Techniques for control channel iterations for cross-carrier scheduling

Abstract

A UE receives control signaling that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduled component carrier (CC) for scheduling communication on the scheduled CC, and identifies a search space set linking configuration for a group of search space sets of the scheduled CC based on the scheduling configuration. The UE identifies a set of decoding candidates in the first and second search space sets that are allocated for cross-carrier scheduling of the scheduled CC based on the search space set linking configuration. The UE then receives at least one control message that schedules communication between the base station and the UE on the scheduled CC within the at least one decoding candidate, and performs the scheduled communication on the scheduled CC.

Description

[Technical Field]

[0001] cross reference This patent application claims priority to U.S. Patent Application No. 17 / 582,473, filed on 24 January 2022, titled "TECHNIQUES FOR CONTROL CHANNEL REPETITION FOR CROSS-CARRIER SCHEDULING," filed on 19 March 2021, titled "TECHNIQUES FOR CONTROL CHANNEL REPETITION FOR CROSS-CARRIER SCHEDULING," and asserts the interests of U.S. Provisional Patent Application No. 63 / 163,522, filed on 19 March 2021, filed by KHOSHNEVISAN et al., titled "TECHNIQUES FOR CONTROL CHANNEL REPETITION FOR CROSS-CARRIER SCHEDULING," which has been assigned to the assignee of this application and is expressly incorporated herein by reference.

[0002] The following concerns wireless communications, including techniques for control channel iteration for cross-carrier scheduling. [Background technology]

[0003] Wireless communication systems are widely deployed to provide various types of communication content, including voice, video, packet data, messaging, and broadcast. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), or LTE-A Pro systems, and fifth-generation (5G) systems, sometimes called New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may sometimes be known as user equipment (UE).

[0004] Some wireless communication systems may allow communications within a component carrier to be scheduled via control signaling within the same component carrier (e.g., "self-scheduling" or "intra-carrier scheduling") and / or via control signaling within different component carriers (e.g., "cross-carrier scheduling" or "inter-carrier scheduling"). In some cases, sets of search spaces on scheduling component carriers may be linked to each other for control channel iterations to improve transmit diversity and reliability of wireless communications. However, some wireless communications exhibit limitations in their ability to schedule component carriers via control channel iterations performed on scheduling component carriers. [Overview of the project] [Means for solving the problem]

[0005] The techniques described relate to improved methods, systems, devices, and apparatus that support techniques for control channel iterations for cross-carrier scheduling. Generally, aspects of this disclosure provide techniques for cross-carrier scheduling using control channel iterations. More specifically, aspects of this disclosure provide techniques and configurations that enable multiple search space sets on a scheduled component carrier to be linked to multiple search space sets on a scheduling component carrier for control channel iterations in order to provide cross-carrier scheduling. Thus, the techniques described herein enable communication to be scheduled on a scheduled component carrier via control channel iterations across search space sets of the scheduling component carrier.

[0006] A method for wireless communication in user equipment (UE) is described. The method may include the steps of: receiving a control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier; identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration; identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier to be allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration; receiving at least one control message from the base station via the scheduling component carrier to schedule communication between the base station and the UE via the scheduled component carrier, within at least one decoding candidate from the set of decoding candidates; and transmitting or receiving communication with the base station via the scheduled component carrier based on the at least one control message.

[0007] The present invention describes an apparatus for wireless communication in a UE. The apparatus may include a processor, memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: receive a control signaling from a base station that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier; identify a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration; identify a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration; receive at least one control message from the base station via the scheduling component carrier that schedules communication between the base station and the UE via the scheduled component carrier, and within at least one decoding candidate from the set of decoding candidates; and transmit or receive communication with the base station via the scheduled component carrier based on at least one control message.

[0008] Another apparatus for wireless communications at a UE is described. The apparatus may include means for receiving control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier; means for identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration; means for identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier, based on the search space set linking configuration, to be allocated for cross-carrier scheduling of the scheduled component carrier; means for receiving at least one control message from the base station via the scheduling component carrier to schedule communications between the base station and the UE via the scheduling component carrier, within at least one decoding candidate from the set of decoding candidates; and means for transmitting or receiving communications with the base station via the scheduling component carrier based on the at least one control message.

[0009] This describes a non-temporary computer-readable medium for storing code for wireless communications in a UE. The code may include instructions executable by a processor to: receive a control signaling from a base station that identifies a scheduling configuration indicating a first and second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier; identify a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration; identify a set of decoding candidates in the first and second search space sets of the scheduling component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration; receive at least one control message from the base station via the scheduling component carrier that schedules communications between the base station and the UE via the scheduled component carrier, and within at least one decoding candidate from the set of decoding candidates; and transmit or receive communications with the base station via the scheduled component carrier based on at least one control message.

[0010] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set-linking configuration may include an operation, feature, means, or instruction for receiving additional control signaling from a base station indicating a search space set-linking configuration.

[0011] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include an operation, feature, means, or instruction for identifying that at least two of a set of multiple search space sets of a scheduled component carrier can be linked for control channel iterations, based on a scheduling configuration that indicates that a first search space set and a second search space set of a scheduling component carrier can be linked for control channel iterations.

[0012] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for monitoring a first decoding candidate in a first search space set for a control message iteration, and a second decoding candidate in a second search space set, which can be linked to the first decoding candidate, for a control message iteration, based on the fact that at least two search space sets are linked for a control channel iteration.

[0013] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include an operation, feature, means, or instruction for identifying that at least two search space sets can be linked for control channel iterations, based on the fact that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are associated with first and second search space set indices which may be the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively.

[0014] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include an operation, feature, means, or instruction for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier can be linked for control channel iterations, based on the fact that at least two search space sets consist of the same amount of decoded candidates per aggregation level.

[0015] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include operations, features, means, or instructions for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier can be linked for control channel iterations, and, based on the fact that at least two search space sets are linked for control channel iterations, that at least two search space sets consist of the same amount of decoded candidates per aggregation level.

[0016] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, at least one decoding candidate from a set of decoding candidates comprises a pair of decoding candidates, and the methods, apparatus, and non-temporary computer-readable media may further include operations, features, means, or instructions for identifying that the pair of decoding candidates can be linked for control channel iterations based on the fact that the pair of decoding candidates corresponds to the same carrier indicator field (CIF), the same candidate index, and the same aggregation level.

[0017] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include actions, features, means, or instructions for identifying that a third set of monitoring occasions in a first search space set of a scheduling component carrier, and a fourth set of monitoring occasions in a second search space set of a scheduling component carrier, may not be linked for control channel iterations for in-carrier scheduling.

[0018] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include an operation, feature, means, or instruction for identifying that at least two of a set of multiple search space sets of a scheduled component carrier may not be linked for control channel iterations.

[0019] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for monitoring a first decoding candidate in a first search space set for a control message and a second decoding candidate in a second search space set for a second control message different from the control message, based on identifying that at least two of a set of multiple search space sets of a scheduled component carrier may not be linked for control channel iterations.

[0020] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for identifying, based on a search space set linking configuration, that a first decoding candidate of a first search space set may not be linked to a second decoding candidate of a second search space set for control channel iterations due to cross-carrier scheduling on a scheduled component carrier.

[0021] Some examples of the methods, apparatuses, and non - transient computer - readable media described herein may further include operations, features, means, or instructions for identifying that, based on a search - space set linking configuration, a third decoding candidate of a first search - space set can be linked to a fourth decoding candidate of a second search - space set for in - carrier scheduling on a scheduling component carrier and for control - channel repetition.

[0022] Some examples of the methods, apparatuses, and non - transient computer - readable media described herein may further include operations, features, means, or instructions for receiving control signaling that indicates a first set of one or more monitoring occasions for a first search - space set and a second set of one or more monitoring occasions for a second search - space set.

[0023] In some examples of the methods, apparatuses, and non - transient computer - readable media described herein, receiving control signaling that identifies a scheduling configuration may include operations, features, means, or instructions for receiving control signaling that indicates a first search - space - set index associated with a first search - space set of a scheduling component carrier and a second search - space - set index associated with a second search - space set of the scheduling component carrier.

[0024] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, a third and fourth search space set among a set of multiple search space sets of a scheduled component carrier may be associated with a first search space set index and a second search space set index, respectively, and the search space set linking configuration may or may not link the third and fourth search space sets for control channel iterations, based on the fact that the first and second search space sets are linked for control channel iterations.

[0025] Some examples of the methods, apparatus, and non-temporary computer-readable media described herein may include an operation, feature, means, or instruction for receiving a control signaling that identifies a scheduling configuration, indicating that at least two of a set of multiple search space sets of a scheduled component carrier may be configured within a first bandwidth part (BWP) of the scheduled component carrier, and that the first and second search space sets of the scheduling component carrier may be configured within a second BWP of the scheduling component carrier.

[0026] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving additional control signaling indicating that a first BWP associated with a first search space set and a second search space set of a scheduling component carrier may be active, and that a second BWP associated with a set of multiple search space sets of a scheduled component carrier may be active, and for one or more iterations of a control message, based on the fact that the first and second BWPs are active, a first decoding candidate for the first search space set and a second decoding candidate for the second search space set.

[0027] Some examples of methods, apparatus, and non-temporary computer-readable media described herein include operations, features, means, or instructions for monitoring a first decoded candidate in the first search space set for a second control message and a second decoded candidate in the second search space set for a second control message repetition, based on the first search space set being linked to a second search space set for control channel repetition for in-carrier scheduling on a scheduling component carrier, the second control message scheduling a second communication between a UE and a base station via a scheduling component carrier.

[0028] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, a first decoding candidate in a first search space set and a second decoding candidate in a second search space set may be associated with a first CIF value corresponding to a scheduling component carrier, and a third decoding candidate in a first search space set and a fourth decoding candidate in a second search space set may be associated with a second CIF value, different from the first CIF value, corresponding to a scheduled component carrier.

[0029] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving additional control signaling from a base station indicating a set of multiple component carriers, including a scheduled component carrier, which may be configured for cross-carrier scheduling via control channel iterations, and identifying, based on the indication of the set of multiple component carriers, that a first decoding candidate of a first search space set may be linked for control channel iterations to a second decoding candidate of a second search space set for cross-carrier scheduling on the scheduled component carrier.

[0030] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving additional control signaling from a base station indicating a set of multiple component carriers, including a scheduled component carrier, which may be configured for cross-carrier scheduling via control channel iterations on a scheduling component carrier, and identifying, based on the indication of the set of multiple component carriers, that a first decoding candidate of a first search space set may be linked for control channel iterations to a second decoding candidate of a second search space set for cross-carrier scheduling on a scheduled component carrier.

[0031] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, a set of multiple search space sets of a scheduled component carrier includes a third search space set and a fourth search space set, the first search space set of the scheduling component carrier and the third search space set of the scheduled component carrier may be associated with a first search space set index, and the second search space set of the scheduling component carrier and the fourth search space set of the scheduled component carrier may be associated with a second search space set index different from the first search space set index.

[0032] A method for wireless communication at a base station is described. The method may include the steps of: transmitting a control signaling to a UE that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier; identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration; identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier, based on the search space set linking configuration, to be allocated for cross-carrier scheduling of the scheduled component carrier; transmitting at least one control message to the UE via the scheduling component carrier, and within at least one decoding candidate from the set of decoding candidates; and transmitting or receiving communication with the UE via the scheduled component carrier based on the at least one control message.

[0033] The present invention describes an apparatus for wireless communication at a base station. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. Instructions may be executable by the processor to cause the apparatus to transmit a control signaling to a UE that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier; identify a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration; identify a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration; transmit at least one control message via the scheduling component carrier that schedules communication between the base station and the UE via the scheduled component carrier, and within at least one decoding candidate from the set of decoding candidates; and transmit or receive communication with the UE via the scheduled component carrier based on at least one control message.

[0034] Another device for wireless communication at a base station is described. The device may include means for transmitting a control signaling to a UE that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier; means for identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration; means for identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration; means for transmitting at least one control message to the UE via the scheduling component carrier, and within at least one decoding candidate from the set of decoding candidates, for scheduling communication between the base station and the UE via the scheduled component carrier; and means for transmitting or receiving communication with the UE via the scheduled component carrier based on the at least one control message.

[0035] The present invention describes a non-temporary computer-readable medium for storing code for wireless communications at a base station. The code may include instructions executable by a processor to: transmit a control signaling to a UE that identifies a scheduling configuration indicating a first and second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier; identify a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration; identify a set of decoding candidates in the first and second search space sets of the scheduling component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration; transmit at least one control message to the UE via the scheduling component carrier that schedules communications between the base station and the UE via the scheduled component carrier, and within at least one decoding candidate from the set of decoding candidates; and transmit or receive communications with the UE via the scheduled component carrier based on at least one control message.

[0036] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set-linking configuration may include an operation, feature, means, or instruction for transmitting additional control signaling indicating the search space set-linking configuration to the UE.

[0037] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include an operation, feature, means, or instruction for identifying that at least two of a set of multiple search space sets of a scheduled component carrier can be linked for control channel iterations, based on a scheduling configuration that indicates that a first search space set and a second search space set of a scheduling component carrier can be linked for control channel iterations.

[0038] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include an operation, feature, means, or instruction for identifying that at least two search space sets can be linked for control channel iterations, based on the fact that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are associated with first and second search space set indices which may be the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively.

[0039] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include an operation, feature, means, or instruction for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier can be linked for control channel iterations, based on the fact that at least two search space sets consist of the same amount of decoded candidates per aggregation level.

[0040] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include operations, features, means, or instructions for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier can be linked for control channel iterations, and, based on the fact that at least two search space sets are linked for control channel iterations, that at least two search space sets consist of the same amount of decoded candidates per aggregation level.

[0041] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include operations, features, means, or instructions for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier can be linked for control channel iterations, based on the fact that each pair of decoded candidates across first and second search space sets for two monitoring occasions is linked for control channel iterations, and each pair of decoded candidates linked for control channel iterations corresponds to the same CIF, the same candidate index, and the same aggregation level.

[0042] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include actions, features, means, or instructions for identifying that a third set of monitoring occasions in a first search space set of a scheduling component carrier, and a fourth set of monitoring occasions in a second search space set of a scheduling component carrier, may not be linked for control channel iterations for in-carrier scheduling.

[0043] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space set linking configuration may include an operation, feature, means, or instruction for identifying that at least two of a set of multiple search space sets of a scheduled component carrier may not be linked for control channel iterations.

[0044] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for identifying, based on a search space set linking configuration, that a first decoding candidate of a first search space set may not be linked to a second decoding candidate of a second search space set for control channel iterations due to cross-carrier scheduling on a scheduled component carrier.

[0045] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for identifying that, based on a search space set linking configuration, a third decoding candidate of a first search space set may be linked to a fourth decoding candidate of a second search space set for control channel iterations, for in-carrier scheduling on a scheduling component carrier.

[0046] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for transmitting control signaling, indicating a first set of one or more monitoring occasions for a first set of search space sets and a second set of one or more monitoring occasions for a second set of search space sets.

[0047] Some examples of the methods, apparatus, and non-temporary computer-readable media described herein may include operations, features, means, or instructions for transmitting control signaling that identifies a scheduling configuration, indicating a first search space set index associated with a first search space set of a scheduling component carrier and a second search space set index associated with a second search space set of a scheduling component carrier.

[0048] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, a third and fourth search space set among a set of multiple search space sets of a scheduled component carrier may be associated with a first search space set index and a second search space set index, respectively, and the search space set linking configuration may or may not link the third and fourth search space sets for control channel iterations, based on the fact that the first and second search space sets are linked for control channel iterations.

[0049] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmitting a control signaling that identifies a scheduling configuration may include an operation, feature, means, or instruction for transmitting a control signaling that indicates at least two of a set of multiple search space sets of a scheduled component carrier may be configured within a first BWP of the scheduled component carrier, and that the first and second search space sets of the scheduling component carrier may be configured within a second BWP of the scheduling component carrier.

[0050] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for transmitting additional control signaling indicating that a first BWP associated with a first search space set and a second search space set of a scheduling component carrier may be active, and that a second BWP associated with a set of multiple search space sets of a scheduled component carrier may be active, wherein transmitting at least one control message may be based on the fact that the first and second BWPs are active.

[0051] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, a first decoding candidate in a first search space set and a second decoding candidate in a second search space set may be associated with a first CIF value corresponding to a scheduling component carrier, and a third decoding candidate in a first search space set and a fourth decoding candidate in a second search space set may be associated with a second CIF value, different from the first CIF value, corresponding to a scheduled component carrier.

[0052] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for transmitting additional control signaling to a UE indicating a set of component carriers, including a scheduled component carrier, which may be configured for cross-carrier scheduling via a control channel iteration, and for identifying, based on the indication of the set of component carriers, that a first decoding candidate in a first search space set may be linked to a second decoding candidate in a second search space set for control channel iterations, for cross-carrier scheduling on the scheduled component carrier.

[0053] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for transmitting additional control signaling to a UE indicating a set of component carriers, including a scheduled component carrier, which may be configured for cross-carrier scheduling via control channel iterations on a scheduling component carrier, and for identifying, based on the indication of the set of component carriers, that a first decoding candidate in a first search space set may be linked to a second decoding candidate in a second search space set for control channel iterations, for cross-carrier scheduling on a scheduled component carrier.

[0054] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, a set of multiple search space sets of a scheduled component carrier includes a third search space set and a fourth search space set, the first search space set of the scheduling component carrier and the third search space set of the scheduled component carrier may be associated with a first search space set index, and the second search space set of the scheduling component carrier and the fourth search space set of the scheduled component carrier may be associated with a second search space set index different from the first search space set index. [Brief explanation of the drawing]

[0055] [Figure 1] This figure shows an example of a wireless communication system that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 2] This figure shows an example of a resource configuration that supports a technique for control channel iterations for cross-carrier scheduling according to an aspect of this disclosure. [Figure 3]This figure shows an example of a resource configuration that supports a technique for control channel iterations for cross-carrier scheduling according to an aspect of this disclosure. [Figure 4] This figure shows an example of a wireless communication system that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 5] This figure shows an example of a resource configuration that supports a technique for control channel iterations for cross-carrier scheduling according to an aspect of this disclosure. [Figure 6] This figure shows an example of a resource configuration that supports a technique for control channel iterations for cross-carrier scheduling according to an aspect of this disclosure. [Figure 7] This figure shows an example of a resource configuration that supports a technique for control channel iterations for cross-carrier scheduling according to an aspect of this disclosure. [Figure 8] This figure shows an example of a process flow that supports a technique for control channel iterations for cross-carrier scheduling according to an aspect of this disclosure. [Figure 9] This is a block diagram of a device supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 10] This is a block diagram of a device supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 11] This is a block diagram of a communications manager supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 12] This is a diagram of a system including a device that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 13] This is a block diagram of a device supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 14] This is a block diagram of a device supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 15] This is a block diagram of a communications manager supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 16] This is a diagram of a system including a device that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 17] This flowchart shows a method for supporting a technique for control channel iterations for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 18] This flowchart shows a method for supporting a technique for control channel iterations for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 19] This flowchart shows a method for supporting a technique for control channel iterations for cross-carrier scheduling according to an aspect of the present disclosure. [Figure 20] This flowchart shows a method for supporting a technique for control channel iterations for cross-carrier scheduling according to an aspect of the present disclosure. [Modes for carrying out the invention]

[0056] Some wireless communication systems may allow communication within a component carrier to be scheduled via control signaling within the same component carrier (e.g., "self-scheduling" or "intra-carrier scheduling") and / or via control signaling in different component carriers (e.g., "cross-carrier scheduling" or "inter-carrier scheduling"). A carrier indicator field (CIF) in the control signaling (e.g., downlink control information (DCI) messages) may indicate whether the control signaling schedules communication within the same component carrier or between different component carriers. In some cases, a "scheduled component carrier" scheduled via control signaling on a "scheduling component carrier" may not consist of a control resource set (CORESET) and may consist only of a search space set. Furthermore, in some implementations, search space sets on scheduling component carriers may be linked to each other for control channel iteration to improve the transmit diversity and reliability of wireless communications. However, in such cases, some wireless communication systems do not provide techniques or configurations that enable cross-carrier scheduling via control channel iterations on a linked search space set of scheduling component carriers. That is, some wireless communication systems do not allow communication on a scheduled component carrier to be scheduled via control message iterations on a linked search space set of scheduling component carriers.

[0057] Accordingly, aspects of the present disclosure provide techniques for cross-carrier scheduling using control channel iterations (e.g., physical downlink control channel (PDCCH) iterations). More specifically, aspects of the present disclosure provide techniques and configurations that enable multiple search space sets on a scheduled component carrier to be linked to multiple search space sets on a scheduling component carrier for control channel iterations, in order to provide cross-carrier scheduling. Accordingly, the techniques described herein enable communication to be scheduled on a scheduled component carrier via control channel iterations across search space sets of the scheduling component carrier.

[0058] For example, a UE may receive a scheduling configuration for cross-carrier scheduling of a scheduled component carrier via control signaling on the scheduling component carrier. The UE may also receive a search space set linking configuration indicating decoded candidates for a search space set of the scheduling component carrier, which can be used to schedule communications within a search space set on the scheduled component carrier. In some embodiments, decoded candidates in different search spaces, "linked" for control channel iterations, may be used to communicate multiple iterations of the same control message (e.g., for cross-carrier or intra-carrier scheduling). The UE may attempt to decode the signals received within each of the PDCCH candidates of the search space set to determine whether a cyclic redundancy check (CRC) passes for any of those candidates. The UE may then receive one or more control messages within the decoded candidates of the scheduling component carrier to schedule communications on the scheduled component carrier, and may perform the scheduled communications on the scheduled component carrier. A UE that successfully decodes at least one of the linked decoded candidates receives at least one iteration of the control message for cross-carrier or intra-carrier scheduling.

[0059] In some embodiments, decoded candidates in different search space sets on a scheduling component carrier are used for cross-carrier scheduling of the scheduled component carrier. The search space sets on the scheduling component carrier may include decoded candidates for intra-carrier scheduling and inter-carrier (e.g., cross-carrier) scheduling. In some cases, decoded candidates on the search space sets of the scheduling component carrier may be linked for control channel iterations for both cross-carrier scheduling and intra-carrier scheduling. In other cases, decoded candidates on the search space sets of the scheduling component carrier may be linked for control channel iterations for intra-carrier scheduling only, or for cross-carrier scheduling only. In some implementations, the UE may determine which decoded candidates are linked for control channel iterations based on control signaling from the base station, or the standard may define linking / unlinking of decoded candidates for cross-carrier scheduling in different search space sets based on whether the configured scheduling component carrier search space sets are linked / unlinked for control channel iterations.

[0060] Aspects of this disclosure will first be described in the context of wireless communication systems. Additional aspects of this disclosure will be described in the context of exemplary resource configurations and exemplary process flows. Aspects of this disclosure will further be illustrated and described with reference to apparatus diagrams, system diagrams, and flowcharts relating to techniques for control channel iteration for cross-carrier scheduling.

[0061] Figure 1 shows an example of a wireless communication system 100 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support extended broadband communication, ultra-high reliability (e.g., mission-critical) communication, low-latency communication, communication with low-cost, low-complexity devices, or any combination thereof.

[0062] Base stations 105 may be distributed across a geographical area to form a wireless communication system 100 and may be devices of different forms or with different capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base station 105 may establish one or more communication links 125. A coverage area 110 may be an example of a geographical area over which base stations 105 and UEs 115 may support the communication of signals by one or more radio access technologies.

[0063] The UE115 may be distributed across the entire coverage area 110 of the wireless communication system 100, and each UE115 may be fixed, mobile, or both at different times. The UE115 may be devices in different forms or with different capabilities. Several exemplary UE115 are shown in Figure 1. The UE115 described herein may be capable of communicating with various types of devices, such as other UE115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in Figure 1.

[0064] Base stations 105 can communicate with the core network 130, with each other, or both. For example, base stations 105 can interface with the core network 130 through one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). Base stations 105 can communicate with each other over the backhaul links 120 (e.g., via X2, Xn, or other interfaces) either directly (e.g., directly between base stations 105), indirectly (e.g., via the core network 130), or both. In some examples, the backhaul links 120 may be one or more wireless links, or may include them.

[0065] One or more of the base stations 105 described herein may include, or be referred to as, a base transceiver station, a radio base station, an access point, a radio transceiver, a node B, an eNode B (eNodeB:eNB), a next-generation node B or giganode B (either of which may be called a gNB), a home node B, a home eNode B, or other more suitable terms.

[0066] UE115 may include, or may be referred to as, a mobile device, wireless device, remote device, handheld device, or subscriber device, or any other preferred term; “device” may also be referred to as a unit, station, terminal, or client, in the examples. UE115 may also include, or may be referred to as, a personal electronic device such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE115 may include, or may be referred to as, a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, in the examples, or may be implemented in various items such as appliances, vehicles, meters, etc.

[0067] The UE115 described herein may be capable of communicating with other UE115s that may function as relays, as well as with various types of devices, including, among other examples, base stations 105 and network equipment, such as macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations.

[0068] UE115 and base station 105 may wirelessly communicate with each other via one or more communication links 125 over one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication links 125. For example, a carrier used for communication link 125 may include a portion of the radio frequency spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry collected signaling (e.g., synchronization signals, system information), control signaling to coordinate operations with the carrier, user data, or other signaling. The wireless communication system 100 may support communication with UE115 using carrier aggregation or multi-carrier operation. UE115 may consist of multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation can be used with both frequency division duplexing (FDD) component carriers and time division duplexing (TDD) component carriers.

[0069] In some examples (for instance, in carrier aggregation configurations), a carrier may also have collection or control signaling to coordinate its operation with other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be arranged according to a channel raster for discovery by the UE115. A carrier may operate in standalone mode, where initial collection and connection may be performed via the carrier by the UE115, or it may operate in non-standalone mode, where connection is anchored using different carriers (e.g., the same or different radio access technologies).

[0070] The communication link 125 shown in the wireless communication system 100 may include uplink transmissions from the UE 115 to the base station 105, or downlink transmissions from the base station 105 to the UE 115. The carrier may carry downlink or uplink communications (for example, in FDD mode), or may be configured to carry both downlink and uplink communications (for example, in TDD mode).

[0071] A carrier may be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths for the carrier of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communication system 100 (e.g., base station 105, UE 115, or both) may have a hardware configuration that supports communication on a specific carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication over carriers associated with multiple carrier bandwidths. In some examples, each UE 115 being served may be configured to operate on a portion of the carrier bandwidth (e.g., a subband, BWP), or all of it.

[0072] The signal waveform transmitted on a carrier can consist of multiple subcarriers (for example, using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM). In systems employing MCM techniques, a resource element may consist of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier interval are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Therefore, the more resource elements the UE115 receives, and the higher the order of the modulation scheme, the higher the data rate of the UE115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communication with the UE115.

[0073] One or more numerologies may be supported for a carrier, where the numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, UE115 may consist of multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communication for UE115 may be limited to one or more active BWPs.

[0074] The time interval for base station 105 or UE115 is, for example, T s = 1 / (Δf max ·N fIt can refer to a sampling period of ) seconds, and can be expressed as a multiple of the basic time unit, where Δf max This can represent the maximum supported subcarrier interval, N f This may represent the maximum supported discrete Fourier transform (DFT) size. The time interval of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0075] Each frame may contain multiple sequentially numbered subframes or slots, each subframe or slot may have the same duration. In some examples, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into several slots. Alternatively, each frame may contain a variable number of slots, the number of slots may depend on the subcarrier interval. Each slot may contain several symbol periods (e.g., depending on the length of the cyclic prefix prepared for each symbol period). In some wireless communication systems 100, a slot may be further divided into several minislots, each containing one or more symbols. Except for the cyclic prefix, each symbol period may contain one or more (e.g., N) symbols. f It may include a sampling period of (1) units. The duration of the symbol period may depend on the subcarrier interval or the frequency band of operation.

[0076] A subframe, slot, minislot, or symbol may be the smallest scheduling unit (for example, in the time domain) of the wireless communication system 100 and may be called a transmission time interval (TTI). In some examples, the TTI duration (for example, the number of symbol periods in the TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (for example, within a burst of shortened TTIs (sTTIs)).

[0077] Physical channels can be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels can be multiplexed on a downlink carrier using, for example, one or more of the following techniques: time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM. A control region for a physical control channel (e.g., a control resource set (CORESET)) may be defined by the number of symbol periods and may extend over the system bandwidth of the carrier, or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UE115s. For example, one or more of the UE115s may monitor or search for control regions for control information according to one or more search space sets, each search space set may contain one or more control channel candidates at one or more aggregation levels arranged in a cascaded manner. The aggregation level for a candidate control channel may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. The search space set may include a common search space set configured to send control information to multiple UE115s and a UE-specific search space set for sending control information to a specific UE115.

[0078] In some examples, base station 105 may be mobile and therefore capable of providing communication coverage to a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but these different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 provide coverage to various geographic coverage areas 110 using the same or different radio access technologies.

[0079] The wireless communication system 100 may be configured to support ultra-reliable low-latency communication, low-latency communication, or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. The UE 115 may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private or group communication and may be supported by one or more mission-critical services such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions may include service prioritization, and mission-critical services may be used for public safety or general commercial purposes. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency may be used interchangeably herein.

[0080] In some examples, UE115 may also be able to communicate directly with other UE115 over a device-to-device (D2D) communication link 135 (for example, using a peer-to-peer (P2P) protocol or a D2D protocol). One or more UE115s utilizing D2D communication may be within the geographical coverage area 110 of base station 105. Other UE115s in such a group may be outside the geographical coverage area 110 of base station 105, or in some cases may not be able to receive transmissions from base station 105. In some examples, a group of UE115s communicating via D2D communication may utilize a one-to-many (1:M) system where each UE115 transmits to any other UE115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication takes place between UE115s without the involvement of base station 105.

[0081] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)), and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UE 115 serviced by base station 105 associated with the core network 130. User IP packets may be forwarded through user plane entities that may provide IP address allocation and other functions. The user plane entity may be connected to IP services 150 of one or more network operators. IP services 150 may include access to the Internet, intranet, IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0082] Some of the network devices, such as the base station 105, may include sub-components such as access network entities 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with the UE 115 through one or more other access network transmission entities 145, which may be called radio heads, smart radio heads, or transmission / reception points (TRPs). Each access network transmission entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or integrated into a single network device (e.g., base station 105).

[0083] The wireless communication system 100 may operate using one or more frequency bands typically ranging from 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, as its wavelengths range from approximately 1 decimeter to 1 meter. While UHF waves may be blocked or redirected by building and environmental characteristics, their waves can penetrate structures well enough for a macrocell to service an indoor UE 115. Transmitting UHF waves may involve smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmitting using lower frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

[0084] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ License Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology in unlicensed bands such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, devices such as base station 105 and UE 115 may employ carrier detection for collision detection and avoidance. In some examples, operation in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in licensed bands (e.g., LAA). Operation in unlicensed spectrums may include, among other examples, downlink transmission, uplink transmission, P2P transmission, or D2D transmission.

[0085] Base station 105 or UE115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE115 may be located in one or more antenna arrays or antenna panels that can support MIMO operation or transmit beamforming or receive beamforming. For example, one or more base station antennas or antenna arrays may be collated in an antenna assembly such as an antenna tower. In some examples, the antennas or antenna arrays associated with base station 105 may be located in diverse geographical locations. Base station 105 may have an antenna array having several rows and columns of antenna ports that base station 105 can use to support beamforming of communication with UE115. Similarly, UE115 may have one or more antenna arrays that can support various MIMO or beamforming operations. As an addition or alternative, an antenna panel may support radio frequency beamforming for signals transmitted through the antenna ports.

[0086] A base station 105 or UE115 may use MIMO communication to enhance spectral efficiency by leveraging multipath signal propagation by transmitting or receiving multiple signals through different spatial layers. Such techniques are sometimes called spatial multiplexing. Multiple signals may be transmitted by a transmitting device through different antennas or different combinations of antennas. Similarly, multiple signals may be received by a receiving device through different antennas or different combinations of antennas. Each of the multiple signals may be called a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0087] Beamforming, sometimes called spatial filtering, directional transmission, or directional reception, is a signal processing technique that can be used in a transmitting or receiving device (e.g., base station 105, UE115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals communicated through the antenna elements of an antenna array such that several signals propagating in a particular direction relative to the antenna array undergo constructive interference, while other signals undergo destructive interference. The coordination of signals communicated through antenna elements may include the transmitting or receiving device applying amplitude offset, phase offset, or both to the signals carried through the antenna elements associated with the device. The coordination associated with each antenna element may be defined by a beamforming weight set associated with a particular direction (e.g., relative to the antenna array of the transmitting or receiving device, or to some other direction).

[0088] The base station 105 or UE 115 may use beam sweeping techniques as part of its beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Several signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions. For example, the base station 105 may transmit signals according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used to identify beam directions for later transmission or reception by the base station 105 (e.g., by a transmitting device such as the base station 105, or by a receiving device such as the UE 115).

[0089] Some signals, such as data signals associated with a specific receiving device, may be transmitted by the base station 105 in a single beam direction (for example, a direction associated with a receiving device such as UE115). In some examples, the beam direction associated with transmission along a single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE115 may receive one or more signals transmitted by the base station 105 in different directions, and UE115 may report to the base station 105 an indication of the signal received with the highest signal quality or, in some cases, an acceptable signal quality.

[0090] In some examples, transmission by a device (e.g., by base station 105 or UE115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from base station 105 to UE115). UE115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may transmit reference signals that can be precoded or amplified (e.g., cell-specific reference signal (CRS), channel state information reference signal (CSI-RS)). UE115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). These techniques will be described with reference to signals transmitted by the base station 105 in one or more directions, but the UE 115 may employ similar techniques to transmit signals multiple times in different directions (for example, to identify beam directions for subsequent transmission or reception by the UE 115) or to transmit signals in a single direction (for example, to transmit data to a receiving device).

[0091] When a receiving device (e.g., UE115) receives various signals from a base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals, it may attempt multiple receiving configurations (e.g., directional listening). For example, the receiving device may attempt multiple receiving directions by receiving through different antenna subarrays, by processing the received signal according to different antenna subarrays, by receiving according to different sets of receive beamforming weights (e.g., different directional listening weights) applied to the received signal at multiple antenna elements of an antenna array, or by processing the received signal according to different sets of receive beamforming weights applied to the received signal at multiple antenna elements of an antenna array, any of which may be referred to as "listening" by different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receiving configuration can be matched to a beam direction determined based on listening in different receiving configuration directions (for example, a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio (SNR), or, in some cases, acceptable signal quality, based on listening in multiple beam directions).

[0092] The wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly for communication on logical channels. The Medium Access Control (MAC) layer may perform priority processing and multiplexing logical channels to transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to improve link efficiency by supporting retransmission at the MAC layer. In the control plane, the Radio Resource Control (RRC) protocol layer may establish, configure, and maintain RRC connections between the UE 115 and the base station 105 or core network 130, supporting radio bearers for user plane data. At the physical layer, transport channels may be mapped to physical channels.

[0093] UE115 and base station 105 may support data retransmission to increase the likelihood of successful data reception. Hybrid automatic repeat request (HARQ) feedback is one technique to increase the likelihood of data being correctly received on communication link 125. HARQ may include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise conditions). In some examples, devices may support same-slot HARQ feedback, where the device provides HARQ feedback within a slot for data received in a previous symbol within a particular slot. In other cases, the device may provide HARQ feedback in subsequent slots or according to some other time interval.

[0094] In some embodiments, the UE 115 of the wireless communication system 100 may consist of up to three CORESETs within a given BWP of a serving cell (e.g., within a given BWP of a component carrier). In some cases (e.g., release 16), the UE 115 may consist of up to five CORESETs within the BWP of a serving cell. A CORESET may be associated with one or more transmission configuration indicator (TCI) states for PDCCH iterations and may be associated with the amount of resource blocks (RB) in the frequency domain and the amount of symbols or other TTIs (e.g., the amount of OFDM symbols) in the time domain. Furthermore, each CORESET may be associated with one active TCI state. In some embodiments, the CORESET configured in UE115 may be associated with a CCE resource element group (CCE-REG) mapping type (e.g., CCE-REG bundle mapping type), a precoding granularity, an identifier associated with scrambling for the PDCCH demodulation reference signal (DMRS) (e.g., a scrambling identifier), coded bits of DCI content, or any combination thereof.

[0095] In some aspects, UE115 may be composed of up to 10 search space sets within a given BWP of a component carrier. In some aspects, each search space set may be associated with one CORESET and may include a set of monitoring occasions. In some aspects, the search space set may include a set of control channel monitoring occasions. For example, the search space set may include a set of monitoring occasions, and the monitoring occasions may occur at regular or irregular intervals (e.g., monitoring occasions every 10 ms). UE115 may be configured to blindly decode the signals received at each monitoring occasion to determine whether the CRC passes at each monitoring occasion. Further, UE115 may determine the control channel monitoring occasions associated with a given search space set based on one or more characteristics of the search space set that may be configured (e.g., pre-configured) in UE115, indicated to UE115 via the base station 105 (e.g., via RRC signaling), or both. UE115 may be composed of one or more different types of search space sets (e.g., searchSpaceType) including UE-specific search space sets, common search space sets, or both. Additionally, each search space set may be associated with one or more DCI formats to be monitored.

[0096] The parameters of the search space set(s) are the period of the monitoring occasion (k s )(e.g., k s number of slots), the offset (o s )(e.g., o s number of slots) for the monitoring occasion per slot unit (e.g., monitoringSlotPeriodicityAndOffset), the duration (T s ) indicating the amount of slots within the period during which the search space set exists (where T s <k s), or any combination thereof. The UE115 of the wireless communication system 100 is

[0097]

number

[0098] In the case of slots

[0099]

number

[0100] and frame η f The number / quantity of PDCCH monitoring occasions (e.g., PDCCH candidates) within the system can be determined. In some embodiments, when monitoring the control channel, the UE115 will determine the slots

[0101]

number

[0102] Starting from, T s It may be configured to monitor control channel candidates (e.g., PDCCH candidates) for a set of search spaces s for a set of consecutive slots, and the following k s -T s It is possible to refrain from monitoring control channel candidates for search space sets s for individual consecutive slots. The number of control channel candidates (e.g., PDCCH candidates) may be based on the aggregation level of wireless communications in UE115 (e.g., the number of CCEs).

[0103] These search space set parameters may be configured (e.g., pre-configured) at UE115, or indicated to UE115 via base station 105 (e.g., via RRC signaling), or both. For example, RRC signaling may be used to configure the parameters of the search space set at UE115, including which CORESET the search space set is associated with, the monitoring occasions of the search space set, the offset of the monitoring occasions, the DCI format to monitor, and the number of PDCCH candidates for a given aggregation level of the search space set.

[0104] Each search space set may be associated with a search space set index. In some implementations, PDCCH candidates may be defined as part of the search space set configuration. For example, a search space set may include a set of PDCCH candidates, where each PDCCH candidate is associated with a given aggregation level and candidate index. In some embodiments, UE115 may be configured to monitor PDCCH candidates in a configured search space set. UE115 may be configured to blind decode PDCCH candidates in a search space set (e.g., monitoring occasions). If UE115 receives a DCI message within a PDCCH candidate, UE115 may identify a CRC path for UE115 (e.g., successful decoding), and UE115 may act according to the received DCI message (e.g., perform communications scheduled by the DCI message).

[0105] In some embodiments, UE115 may be configured to monitor control channels according to a control channel monitoring pattern within a slot (e.g., a PDCCH monitoring pattern) (e.g., monitoringSymbolsWithinSlot). For example, a PDCCH monitoring pattern within a slot may indicate the first symbol of the CORESET within the slot for PDCCH monitoring. For example, in the context of a slot containing 14 symbols, the CORESET configured in UE115 may be associated with a search space set containing 3 symbols, and the control channel monitoring pattern associated with that search space set (e.g., monitoringSymbolsWithinSlot) may be configured as "01000010001000". In this example, UE115 may be configured to determine that there are 3 monitoring occasions (e.g., PDCCH candidates) within each slot where the search space set resides. Furthermore, UE115 may be configured to determine that the 3 monitoring occasions begin at the second, seventh, and eleventh symbols in each respective slot where the search space set resides.

[0106] In some embodiments, multiple search space sets and / or multiple PDCCH candidates may be linked (e.g., associated with each other) for possible repetitions of the same control channel transmission (e.g., repetitions of DCI). Linked PDCCH candidates may be used to transmit / receive repetitions of the same control message. In other words, PDCCH candidates may be linked with each other for a “PDCCH repetition”. In the context of a PDCCH repetition, the payload (e.g., DCI payload) received in two PDCCH candidates (e.g., two PDCCH repetitions) may be the same. For example, a first PDCCH candidate may be associated with or linked to a second PDCCH candidate. In this example, a first repetition of DCI may be transmitted in the first PDCCH candidate, and a second repetition of DCI may be transmitted in the second PDCCH candidate, where the first and second repetitions of DCI are the same. In this example, UE115 may receive and / or decode only the first repetition of DCI or only the second repetition of DCI. As an addition or alternative, UE115 may receive and / or decode both the first and second iterations of the DCI by performing soft synthesis of the first and second iterations of the DCI, and the UE may recognize the linking before decoding. In some embodiments, the related / linked PDCCH candidates may have the same aggregation level (e.g., the same number of CCEs).

[0107] In some embodiments, PDCCH candidates related in different search space sets associated with a corresponding CORESET may be linked (e.g., related) to one another for PDCCH iterations. In some cases, two PDCCH candidates having the same candidate index across two related search space sets may be linked or related. In other cases, PDCCH candidates having the same starting CCE index may be linked. Furthermore, UE115 may consist of a set of linked / related PDCCH candidates that are in the same slot or TTI (e.g., intra-slot PDCCH iterations), a set of linked / related PDCCH candidates that are in different slots (e.g., inter-slot PDCCH iterations), or both.

[0108] The wireless communication system 100 may be configured to support inter-carrier scheduling (e.g., cross-carrier scheduling), intra-carrier scheduling (e.g., self-scheduling), or both. Inter-carrier scheduling, or cross-carrier scheduling, refers to a case where control signaling transmitted / received on a first component carrier (e.g., scheduling component carrier, scheduling cell) is used to schedule communications on different component carriers (e.g., scheduling component carrier, scheduling cell) (e.g., physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH)). Conversely, intra-carrier scheduling, or self-scheduling, refers to a case where control signaling transmitted / received on a component carrier is used to schedule communications on the same component carrier (e.g., the same cell).

[0109] In some embodiments, a search space set may include control channel candidates (e.g., PDCCH candidates) configured for self-scheduling, cross-carrier scheduling, or both. CCEs associated with control channel candidates for different scheduled component carriers within a monitoring occasion of a search space set (e.g., PDCCH candidates for self-scheduling, PDCCH candidates for cross-carrier scheduling) may be identified separately based on the number of candidates per aggregation level. The number / quantity of candidates per aggregation level may be configured in the scheduled component carrier and monitored in the scheduling component carrier. For example, a monitoring occasion for a search space set may include a set of PDCCH candidates with two aggregation levels (e.g., two CCEs per PDCCH candidate). In this example, the set of PDCCH candidates may include a first subset of PDCCH candidates configured for self-scheduling (e.g., a subset of PDCCH candidates with CIF=0) and a second subset of PDCCH candidates for cross-carrier scheduling (e.g., a subset of PDCCH candidates with CIF=1). In this regard, a single set of search spaces may include PDCCH candidates configured for self-scheduling, cross-carrier scheduling, or both.

[0110] Some wireless communication systems do not provide techniques or configurations that enable cross-carrier scheduling via control channel iterations on a linked search space set of scheduling component carriers. That is, some wireless communication systems do not allow communication to be scheduled on a scheduled component carrier via control message iterations on a linked search space set of scheduling component carriers.

[0111] Therefore, the UE 115 and base station 105 of the wireless communication system 100 may support techniques for cross-carrier scheduling using control channel iterations (e.g., PDCCH iterations). More specifically, the wireless communication system 100 may support techniques and configurations that enable multiple search space sets on a scheduled component carrier to be linked to multiple search space sets on a scheduling component carrier for control channel iterations, in order to provide cross-carrier scheduling. Thus, the techniques described herein enable communication to be scheduled on a scheduled component carrier via control channel iterations across search space sets of the scheduling component carrier.

[0112] For example, UE115 of the wireless communication system 100 may receive a scheduling configuration for cross-carrier scheduling of a scheduled component carrier via control signaling on the scheduling component carrier. UE115 may also receive a search space set linking configuration indicating decoded candidates for a search space set of the scheduling component carrier, which can be used to schedule communications within a search space set on the scheduled component carrier. In some embodiments, decoded candidates in different search spaces, “linked” for control channel iterations, may be used to communicate multiple iterations of the same control message (e.g., for cross-carrier or intra-carrier scheduling). UE115 may then receive one or more control messages within the decoded candidates of the scheduling component carrier to schedule communications on the scheduled component carrier, and the scheduled communications may be executed on the scheduled component carrier.

[0113] In some embodiments, decoded candidates in different search space sets on a scheduling component carrier are used for cross-carrier scheduling of the scheduled component carrier. The search space sets on the scheduling component carrier may include decoded candidates for intra-carrier scheduling and inter-carrier (e.g., cross-carrier) scheduling. In some cases, decoded candidates on the search space sets of the scheduling component carrier may be linked for control channel iterations for both cross-carrier scheduling and intra-carrier scheduling. In other cases, decoded candidates on the search space sets of the scheduling component carrier may be linked for control channel iterations for intra-carrier scheduling only, or for cross-carrier scheduling only. In some implementations, UE115 may determine which decoded candidates are linked for control channel iterations based on control signaling from base station 105, or the standard may define linking / unlinking of decoded candidates for cross-carrier scheduling in different search space sets based on whether the configured scheduling component carrier search space sets are linked / unlinked for control channel iterations.

[0114] The techniques described herein may provide improved cross-carrier scheduling. More specifically, the techniques described herein may enable the use of PDCCH iterations in the context of cross-carrier scheduling, thereby enabling a set of search spaces on a scheduled component carrier to be scheduled via signaling transmitted / received on a linked set of search spaces on a scheduling component carrier. By enabling PDCCH iterations in the context of cross-carrier scheduling, the techniques described herein may improve the transmission diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0115] Figure 2 shows an example of a resource configuration 200 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. An aspect of the resource configuration 200 implements, or may implement, a wireless communication system 100.

[0116] As previously stated herein, multiple search space sets 205 may be linked to one another for control channel iterations (e.g., PDCCH iterations). For example, as shown in resource configuration 200, a first search space set 205-a may be linked to a second search space set 205-b. More specifically, monitoring occasions 210 associated with the first search space set 205-a (e.g., monitoring occasions 210-a, 210-b, 210-e, 210-f) may be linked to monitoring occasions 210 associated with the second search space set 205-b (e.g., monitoring occasions 210-c, 210-d, 210-g, 210-h). In some embodiments, related PDCCH candidates in each search space set 205 associated with the corresponding CORESET (for example, PDCCH candidates in the monitoring occasions 210 of each search space set 205) may be linked to each other (e.g., related) for PDCCH iterations.

[0117] In some cases, two PDCCH candidates with the same candidate index across two related search space sets 205 may be linked or related. In other cases, PDCCH candidates with the same starting CCE index may be linked. Furthermore, UE115 may consist of a set of linked / related PDCCH candidates that are in the same slot or TTI (e.g., in-slot PDCCH iterations), a set of linked / related PDCCH candidates that are in different slots (e.g., inter-slot PDCCH iterations), or both.

[0118] Associations (e.g., links) between search space sets 205 and / or between PDCCH candidates may be configured (e.g., pre-configured) at UE 115, signaled to UE 115 by base station 105 (e.g., via RRC signaling), or both. For example, UE 115 may receive an RRC message indicating that a first PDCCH candidate in a first search space set 205-a is linked (e.g., related) to a second PDCCH candidate in a second search space set 205-b. As another example, UE 115 may receive an RRC message indicating that a first search space set 205-a is linked (e.g., related) to a second search space set 205-b for a PDCCH iteration. In this example, PDCCH candidates with the same aggregation level and the same candidate index may be linked between the first and second search space sets 205. More specifically, the first search space set 205-a and the second search space set 205-b may each include a first set of PDCCH candidates (a first set of monitoring occasions 210) and a second set of PDCCH candidates (a second set of monitoring occasions 210), where the first set of PDCCH candidates is linked to the second set of PDCCH candidates.

[0119] In some cases, the first and second sets of monitoring occasions 210 may contain the same amount of monitoring occasion / PDCCH candidates (e.g., one-to-one mappings of monitoring occasions). For example, monitoring occasion 210-a associated with the first search space set 205-a may contain the same amount of PDCCH candidates as monitoring occasion 210-c associated with the second search space set 205-b. Similarly, monitoring occasions 210-b, 210-e, and 210-f associated with the first search space set may contain the same amount of PDCCH candidates as monitoring occasions 210-d, 210-g, and 210-h associated with the second search space set 205-b, respectively. Furthermore, the first search space set 205-a and the second search space set 205-b may consist of the same amount of PDCCH candidates per aggregation level.

[0120] In some embodiments, the resource configuration 200 may support techniques for control channel iterations (e.g., PDCCH iterations) in the context of cross-carrier scheduling, thereby enabling search space sets 205 on a scheduled component carrier to be scheduled via signaling transmitted / received on linked search space sets 205 on a scheduling component carrier. More specifically, embodiments of the resource configuration 200 may support techniques and configurations that enable multiple search space sets 205 on a scheduled component carrier to be linked to multiple search space sets 205 on a scheduling component carrier for control channel iterations, as will be further described herein with respect to Figures 4 to 8, in order to provide cross-carrier scheduling.

[0121] Figure 3 shows an example of a resource configuration 300 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. An aspect of resource configuration 300 may implement, or be implemented by, a wireless communication system 100, resource configuration 200, or both. Resource configuration 300 shows a configuration for intra-carrier and inter-carrier (e.g., cross-carrier) scheduling.

[0122] In some embodiments, some wireless communication systems (e.g., wireless communication system 100) may be configured to support inter-carrier scheduling (e.g., cross-carrier scheduling), intra-carrier scheduling (e.g., self-scheduling), or both. Inter-carrier scheduling, or cross-carrier scheduling, refers to a case where control signaling transmitted / received on a first component carrier (e.g., scheduling component carrier, scheduling cell) is used to schedule communications (e.g., PDSCH, PUSCH) on different component carriers (e.g., scheduling component carrier, scheduling cell). Conversely, intra-carrier scheduling, or self-scheduling, refers to a case where control signaling transmitted / received on a component carrier is used to schedule communications on the same component carrier (e.g., the same cell).

[0123] For example, as shown in resource configuration 300, the scheduling component carrier 305-a may be associated with search space sets 310-a, 310-b, 310-c, and 310-d, which are configured to schedule communications on the scheduled component carrier 305-b. In this regard, the search space set 310 of the scheduling component carrier 305-a may be configured for cross-carrier scheduling on the scheduled component carrier 305-b.

[0124] In some implementations, search space sets 310 having the same search space set index (searchSpaceId) in a scheduling component carrier 305-a (e.g., a scheduling cell) and a scheduled component carrier 305-b (e.g., a scheduled cell) may be associated with (e.g., linked) each other. For example, a first search space set 310-a on a scheduling component carrier 305-a having a first search space set index (e.g., searchSpaceId=1) may be linked to a second search space set 310-e on a scheduled component carrier 305-b having a first search space set index (e.g., searchSpaceId=1) for cross-carrier scheduling. More specifically, a search space set 310 in a scheduled component carrier 305-b may be linked to a search space set 310 in a scheduling component carrier 305-a, where the configuration of the search space set 310 in the scheduling component carrier 305-b may be used to determine the number of decryption candidates to be monitored in the scheduling component carrier 305-a.

[0125] Accordingly, the terms “linked,” “linking,” and similar terms may be used throughout this disclosure in two different contexts. Firstly, related PDCCH candidates in different search space sets 310 may be said to be “linked” for PDCCH iterations, in which case multiple iterations of the same control message may be transmitted / received within the linked PDCCH candidates. Secondly, a search space set 310 in a scheduled component carrier 305-b may be said to be “linked” to a search space set 310 in a scheduling component carrier 305-a for cross-carrier scheduling, in which case the configuration of the search space set 310 in the scheduled component carrier 305-b may be used to determine the number of decryption candidates that will be monitored within the search space set 310 of the scheduling component carrier 305-a.

[0126] In some embodiments, cross-carrier scheduling may be performed only if both the BWP associated with the linked search space set 310 in the scheduling component carrier 305-a and the scheduled component carrier 305-b are active. In other words, continuing the above example, the UE 115 may be configured to apply the search space set 310 in the scheduling component carrier 305-a to schedule the scheduled component carrier 305-b only if both the downlink BWP associated with the linked search space set 310 in the scheduled component carrier 305-b and the scheduling component carrier 305-a are active.

[0127] For example, UE115 may consist of a first search space set 310-a on scheduling component carrier 305-a and a second search space set 310-e on scheduled component carrier 305-b, where the first search space set 310-a and the second search space set 310-e are linked for cross-carrier scheduling. In this example, UE115 may be configured to perform cross-carrier scheduling only when both the first BWP associated with the first search space set 310-a and the second BWP associated with the second search space set 310-e are active (for example, applying the first search space set 310-a on scheduling component carrier 305-a for scheduled component carrier 305-b for cross-carrier scheduling). In some cases, the first and second BWPs for the linked search space sets 310-a and 310-e may be the same.

[0128] The search space set 310 of the scheduling component carrier 305-a may be configured for in-carrier scheduling, either additionally or alternatively. In detail, the search space set 310 may include control channel candidates (e.g., PDCCH candidates) configured for self-scheduling, cross-carrier scheduling, or both. For example, the first search space set 310-a may include a first set of control channel candidates 315-a, 315-c, 315-e (e.g., PDCCH candidates, decoding candidates) configured for in-carrier scheduling (e.g., self-scheduling), and a second set of control channel candidates 315-b, 315-d configured for cross-carrier scheduling. In this regard, control signaling performed on a first set of control channel candidates 315-a, 315-c, and 315-e may be used to schedule communication on scheduling component carrier 305-a, whereas control signaling performed on a second set of control channel candidates 315-b and 315-d may be used to schedule communication on scheduled component carrier 305-b (for example, within search space set 310-e).

[0129] In some embodiments, a CIF within a control signaling message (e.g., a DCI message) may indicate whether the control signaling schedules communication on the same component carrier 305 on which it was transmitted / received, or on a different component carrier 305. For example, a DCI with a CIF value of 0 (e.g., CIF=0) may indicate that the DCI schedules communication on the same component carrier 305 on which it was transmitted / received. In this regard, a CIF value of 0 may indicate self-scheduling. As another example, a DCI with a non-zero CIF value (e.g., CIF=1, 2, etc.) may indicate that the DCI schedules communication on a different component carrier 305 than the one on which it was transmitted / received. In this regard, a non-zero CIF value may indicate cross-carrier scheduling.

[0130] Furthermore, each control channel candidate 315 may be associated with a CIF value used for intra-carrier and cross-carrier scheduling. For example, as shown in resource configuration 300, a first set of control channel candidates 315-a, 315-c, and 315-e may be associated with a first CIF value configured for intra-carrier scheduling (e.g., CIF=0), and a second set of control channel candidates 315-b and 315-d may be associated with a second CIF value configured for cross-carrier scheduling (e.g., CIF=1). In some embodiments, the CIF may consist of 0 to 3 bits. If the DCI includes a CIF consisting of 0 bits, the DCI may only support self-scheduling.

[0131] CCEs associated with control channel candidates 315 for different scheduled component carriers 305 within a monitoring occasion of search space set 310 (e.g., a first set of control channel candidates 315-a, 315-c, and 315-e for self-scheduling, and a second set of control channel candidates 315-b and 315-d for cross-carrier scheduling) can be identified separately based on the amount of candidates per aggregation level. The amount of candidates per aggregation level may be configured in scheduled component carrier 305-b and monitored in scheduling component carrier 305-a. For example, the first search space set 310-a may include a monitoring occasion that includes a set of control channel candidates 315 with two aggregation levels (e.g., two CCEs for each control channel candidate 315). In this example, the set of control channel candidates 315 may include a first subset of control channel candidates 315-a, 315-c, and 315-e configured for self-scheduling (e.g., a subset of PDCCH candidates with CIF=0) and a second subset of control channel candidates 315-b and 315-d for cross-carrier scheduling (e.g., a subset of PDCCH candidates with CIF=1). In this regard, a single search space set 310 may include PDCCH candidates configured for self-scheduling, cross-carrier scheduling, or both. In some examples, time-domain behavior, monitoring occasions, DCI formats for monitoring, or any combination thereof may be configured in the search space set 310 for a scheduling cell, and the number of candidates per aggregation level may be configured in the search space set 310 for a scheduled cell (e.g., a search space set 310 with the same index).For example, the dashed arrows in Figure 3 represent the association (linking) of search space sets 310 that have the same search space set index in the scheduling cell and the scheduled cell (for example, the linking between search space set 310-a of the scheduling component carrier 305-a and search space set 310-e of the scheduled cell).

[0132] In some embodiments, the scheduled component carrier 305-b (e.g., a scheduled cell) may not be configured in a CORESET but may be configured in a search space set 310 (e.g., search space sets 310-e, 310-f, 310-g, 310-h). For a search space set 310 configured in the scheduled component carrier 305-b, fields associated with the search space set index (e.g., searchSpaceId) and the amount of control channel candidates per aggregation level (e.g., nrofCandidates) may be configured. In comparison, other fields for the search space set 310 configured in the scheduled component carrier 305-b, including fields associated with the CORESET, fields associated with time-domain properties (e.g., period, offset, duration, monitoring symbols per slot), and fields associated with the DCI format for monitoring, may be absent or not configured. More specifically, these fields (with the exception of the field relating to the amount of control channel candidates per aggregation level) may be defined for the search space set 310 of the scheduling component carrier 305-a that schedules each scheduled component carrier 305-b (for example, a search space set with the same index).

[0133] In some embodiments, embodiments of resource configuration 300 may support techniques for control channel iterations (e.g., PDCCH iterations) in the context of cross-carrier scheduling, thereby enabling search space sets 310 on scheduled component carrier 305-b to be scheduled via signaling transmitted / received on linked search space sets 310 on scheduling component carrier 305-a. More specifically, embodiments of resource configuration 300 may support techniques and configurations that enable multiple search space sets 310 on scheduled component carrier 305-b to be linked to multiple search space sets 310 on scheduling component carrier 305-a for control channel iterations, in order to provide cross-carrier scheduling, as will be further described herein with respect to Figures 4 to 8.

[0134] Figure 4 shows an example of a wireless communication system 400 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. In some examples, the wireless communication system 400 may implement or be implemented in an aspect of the wireless communication system 100, resource configuration 200, resource configuration 300, or any combination thereof. For example, the wireless communication system 400 may support a control configuration for linking a set of search spaces across component carriers for control channel iteration and cross-carrier scheduling, as described in Figures 1 to 3.

[0135] The wireless communication system 400 may include base station 105-a and UE115-a, which may be examples of base station 105 and UE115 as described with reference to Figure 1. UE115-a may communicate with base station 105-a using communication link 405, which may be an example of an NR or LTE link between UE115-a and base station 105-a. In some cases, communication link 405 between UE115-a and base station 105-a may include an example of an access link (e.g., a Uu link) which may include a bidirectional link that enables both uplink and downlink communication. For example, UE115-a may transmit uplink signals, such as uplink control signals or uplink data signals, to base station 105-a using communication link 405, and base station 105-a may transmit downlink signals, such as downlink control signals or downlink data signals, to UE115-a using communication link 405.

[0136] In some embodiments, the UE 115-a and base station 105-a of the wireless communication system 400 may support techniques for cross-carrier scheduling using control channel iterations (e.g., PDCCH iterations). More specifically, the UE 115-a and base station 105-a of the wireless communication system 400 may support techniques and configurations that enable multiple search space sets on a scheduled component carrier to be linked to multiple search space sets on a scheduling component carrier for control channel iterations, in order to provide cross-carrier scheduling. Thus, the techniques described herein enable communication to be scheduled on a scheduled component carrier via control channel iterations across search space sets of the scheduling component carrier.

[0137] In some embodiments, UE115-a may receive control signaling (e.g., RRC messages, DCI messages) from base station 105-a. In some embodiments, the control signaling may indicate a set of component carriers (e.g., cell groups) configured for cross-carrier scheduling. More specifically, the control signaling may indicate a set of component carriers configured for cross-carrier scheduling via control channel iterations (e.g., PDCCH iterations).

[0138] For example, UE115-a may receive RRC signaling indicating a set of component carriers (e.g., a cell group) including a scheduled component carrier 425 configured for cross-carrier scheduling via a control channel iteration. Alternatively, UE115-a may receive RRC signaling indicating a set of component carriers including a scheduled component carrier 425 configured for cross-carrier scheduling via a control channel iteration on a scheduling component carrier 420. In this regard, the RRC signaling may indicate that cross-carrier scheduling via a control channel iteration on a specified scheduling component carrier 420 applies to all component carriers within a set of component carriers (e.g., within a cell group). Additionally or alternatively, the control signaling may indicate that a set of component carriers is configured for cross-carrier scheduling via a control channel iteration on a given BWP (e.g., a downlink BWP) of the scheduling component carrier 420. In other cases, the control signaling may indicate that a set of search spaces within the downlink BWP of the scheduled component carrier 425 is configured for cross-carrier scheduling via a control channel iteration.

[0139] In some embodiments, UE115-a may receive control signaling (e.g., RRC messages, DCI messages) from base station 105-a that identifies a scheduling configuration 410 for scheduling communications 440 on UE115-a. In some embodiments, the scheduling configuration 410 may represent a first search space set 430 and a second search space set 430 of the scheduling component carrier 420 that can be used to schedule communications 440 on the scheduled component carrier 425. In this regard, the scheduling configuration 410 may represent a configuration for cross-carrier scheduling, where the scheduled component carrier 425 can be scheduled via communications 440 received on the search space set 430 of the scheduling component carrier 420. The scheduling configuration 410 may represent any number of search space sets 430 on the scheduling component carrier 420 that can be used to schedule communications 440 on the scheduled component carrier 425.

[0140] In some embodiments, the search space set 430 of the scheduling component carrier 420 may include decryption candidates allocated for cross-carrier scheduling, intra-carrier scheduling, or both. Decryption candidates may be associated with a CIF value indicating whether each decryption candidate is configured for cross-carrier scheduling or intra-carrier scheduling. For example, a decryption candidate associated with a first CIF value (e.g., CIF=0) may be configured for intra-carrier scheduling (e.g., scheduling communications 440 on the scheduling component carrier 420), while a decryption candidate associated with a second CIF value (e.g., CIF=1) may be configured for cross-carrier scheduling (e.g., scheduling communications 440 on the scheduled component carrier 425).

[0141] In some embodiments, the control signaling indicating the scheduling configuration 410 may further indicate one or more parameters associated with the scheduling configuration 410, including a set of monitoring occasions associated with each search space set 430, a search space set index associated with the search space set 430 on the scheduling component carrier 420 and / or the scheduled component carrier 425, and a BWP associated with each search space set 430.

[0142] For example, referring to the search space set linking configuration 415-a shown in Figure 4, the control signaling indicating the scheduling configuration 410 may indicate a first search space set index associated with a first search space set 430-a of the scheduling component carrier 420-a, and a second search space set index associated with a second search space set 430-b of the scheduling component carrier 420-a. As another example, the control signaling including the scheduling configuration 410 may indicate search space set indices associated with a third search space set 430-c and a fourth search space set 430-d of the scheduled component carrier 425-a. The search space set 430 of the scheduled component carrier 425 may be associated with the same or a different search space set index as the search space set 430 of the scheduling component carrier 420. For example, continuing the reference to the search space set linking configuration 415-a shown in Figure 4, the first search space set 430-a of the scheduling component carrier 420-a and the third search space set 430-c of the scheduled component carrier 425-a may be associated with the same search space set index (e.g., searchSpaceId 1), and the second search space set 430-b of the scheduling component carrier 420-a and the fourth search space set 430-d of the scheduled component carrier 425-a may be associated with the same search space set index (e.g., searchSpaceId 4).

[0143] Therefore, the term “linked” may be used throughout this disclosure in two different contexts to refer to PDCCH candidates linked for PDCCH iterations and search space sets 430 linked for cross-carrier scheduling (for example, the search space set 430 of a scheduled component carrier 425 used to determine the decryption candidates that will be monitored within a scheduling component carrier 420). Thus, the vertical arrows between search space sets 430 shown in Figure 4 indicate “linking” for PDCCH iterations, while the horizontal arrows between search space sets 430 on different component carriers 420, 425 shown in Figure 4 indicate “linking” for cross-carrier scheduling.

[0144] In some embodiments, the control signaling indicating the scheduling configuration 410 may, in addition or alternatively, indicate the BWPs of the respective search space sets 430 of the scheduling component carrier 420, the scheduled component carrier 425, or both. For example, referring to the first search space set linking configuration 415-a, the control signaling may indicate that the first search space set 430-a and the second search space set 430-b of the scheduling component carrier 420-a are configured within the first BWP of the scheduling component carrier 420-a. Similarly, the control signaling may indicate that at least two search space sets 430 of the scheduled component carrier 425-a (e.g., the third search space set 430-c and the fourth search space set 430-d) are configured within the second BWP of the scheduled component carrier 425-a. In some embodiments, the first BWP of the scheduling component carrier 420-a and the second BWP of the scheduled component carrier 425-a may be different.

[0145] UE115-a may receive control signaling (e.g., RRC messages, DCI messages) from base station 105-a indicating a search space set linking configuration 415 for a set of search space sets 430 of the scheduled component carrier 425. Based on receiving control signaling including a scheduling configuration 410, UE115-a may receive control signaling indicating a search space set linking configuration 415. Additionally or alternatively, the scheduling configuration 410 and the search space set linking configuration 415 may be communicated within the same control signaling (e.g., via the same RRC message). Furthermore, in some cases, UE115-a may be configured (e.g., pre-configured) with the search space set linking configuration 415.

[0146] In some embodiments, UE115-a, base station 105-a, or both may identify the search space set linking configuration 415. In some embodiments, UE115-a and / or base station 105-a may identify the search space set linking configuration 415 based on transmitting / receiving control signaling indicating the search space set linking configuration 415. Additionally or alternatively, UE115-a may identify the search space set linking configuration 415 based on transmitting / receiving control signaling including a scheduling configuration 410. Furthermore, in some cases, UE115-a may be configured with the search space set linking configuration 415 (e.g., pre-configured) and thus configured to identify the search space set linking configuration 415 without control signaling from base station 105-a.

[0147] In some embodiments, the search space set linking configuration 415 may indicate whether or not a search space set 430 on the scheduled component carrier 425 is linked for control channel iterations. That is, the search space set linking configuration 415 may indicate whether or not control channel iterations on the search space set 430 of the scheduling component carrier 420 can be used to schedule communications 440 within the search space set 430 of the scheduled component carrier 425. If two or more search space sets 430 on the scheduling component carrier 420 are linked for control channel iterations, then the control channel iterations on the scheduling component carrier 420, along with the number of PDCCH candidates determined from the two or more search space sets 430 of the scheduled component carrier 425, can be used to schedule communications 440 on the scheduled component carrier 425. Conversely, if two or more search space sets 430 on the scheduling component carrier 420 are not linked for control channel iterations (e.g., not linked), then the control channel iterations on the scheduling component carrier 420 may not be used to schedule communications 440 on two or more search space sets 430 of the scheduled component carrier 425. In some embodiments, due to the fact that the scheduled component carrier 425 is scheduled via control signaling on the scheduling component carrier 420, the search space sets 430 of the scheduled component carrier 425 may not actually be monitored by UE 115-a and may therefore be referred to as "dummy" search space sets 430.

[0148] Therefore, by identifying the search space set linking configuration 415, the UE 115-a and base station 105-a may be configured to identify whether the search space set 430 of the scheduled component carrier 425 is linked or not for control channel iterations. In some embodiments, the UE 115-a and / or base station 105-a may identify whether the search space set 430 of the scheduled component carrier 425 is linked or not for control channel iterations based on explicit signaling, scheduling configuration 410, the search space set index associated with the search space set 430 of the scheduling component carrier 420 and / or the scheduled component carrier 425, the amount of decoded candidates per aggregation level, predefined rules, or any combination thereof.

[0149] For example, referring to the first search space set linking configuration 415-a, UE 115-a and / or base station 105-a may identify that the search space sets 430-c and 430-d of the scheduled component carrier 425-a are linked for control channel iterations, based on the scheduling configuration 410, which indicates that the first search space set 430-a and the second search space set 430-b of the scheduling component carrier 420-a are linked for control channel iterations. In other words, based on the fact that the search space sets 430-a and 430-b of the scheduling component carrier 420-a are linked (or not linked) for PDCCH iterations, the search space sets 430-c and 430-d of the scheduled component carrier 425-a may be linked (or not linked) for PDCCH iterations.

[0150] In other implementations, the search space set 430 of the scheduling component carrier 420 may be linked for control channel iterations, while the search space set 430 of the scheduled component carrier 425 may not be linked for control channel iterations. For example, as shown in the second search space set linking configuration 415-b, the UE 115-a and / or base station 105-a may determine that the search space sets 430-e and 430-f of the scheduling component carrier 420-b are linked for control channel iterations, while the search space sets 430-g and 430-h of the scheduled component carrier 425-b are not linked for control channel iterations.

[0151] Conversely, in other implementations, the search space set 430 of the scheduled component carrier 425 may be linked for control channel iterations, even though the search space set 430 of the scheduling component carrier 420 is not linked for control channel iterations for the purpose of scheduling (e.g., self-scheduling) the scheduling component carrier 420. For example, as shown in the third search space set linking configuration 415-c, the UE 115-a and / or base station 105-a may determine that the search space sets 430-k, 430-l of the scheduled component carrier 425-c are linked for control channel iterations, even though the search space sets 430-i, 430-j of the scheduling component carrier 420-c are not linked for control channel iterations for the purpose of scheduling (e.g., self-scheduling) the scheduling component carrier 420-c.

[0152] As an addition or alternative, UE115-a and / or base station 105-a may identify that the search space set 430 in the scheduled component carrier 425 is linked for control channel iterations, based on the fact that the search space sets 430 in the scheduling component carrier 420 and the scheduled component carrier 425 are associated with a common search space set index. For example, UE115-a and / or base station 105-a may identify that the search space set 430 in the scheduled component carrier 425 is linked for control channel iterations, based on the fact that the search space set 430 in the scheduled component carrier 425 is associated with a search space set index that is the same as the search space set index for the search space set 430 in the scheduling component carrier 420, respectively. For example, referring to the first search space set linking configuration 415-a, the first search space set 430-a and the second search space set 430-b of the scheduling component carrier 420-a may be associated with the first and second search space set indices, respectively. In this example, UE115-a may determine that the third search space set 430-c and the fourth search space set 430-d of the scheduled component carrier 425-a are linked for control channel iterations, based on the determination that the third search space set 430-c and the fourth search space set 430-d are associated with the first and second search space set indices, respectively.

[0153] In some embodiments, UE115-a and / or base station 105-a may determine whether the search space sets 430 of the scheduled component carrier 425 are linked or not for control channel iterations, based on the amount of decoded candidates per aggregation level within each search space set 430. For example, referring to the first search space set linking configuration 415-a, UE115-a and / or base station 105-a may identify that the third search space set 430-c and the fourth search space set 430-d of the scheduled component carrier 425-a are linked for control channel iterations, based on the fact that the third search space set 430-c and the fourth search space set 430-d consist of the same amount of decoded candidates per aggregation level. In other words, the third search space set 430-c and the fourth search space set 430-d can be linked for PDCCH iterations, based on the fact that each search space set has a one-to-one mapping of decryption candidates within each aggregation level.

[0154] In some embodiments, UE115-a, base station 105-a, or both, may identify sets of decoding candidates in the first and second search space sets 430 of the scheduling component carrier 420 that are allocated for cross-carrier scheduling of the scheduled component carrier 425. As previously stated herein, the search space sets 430 of the scheduling component carrier 420 may include decoding candidates allocated for cross-carrier scheduling, intra-carrier scheduling, or both. In this regard, UE115-a and / or base station 105-a may be configured to identify which decoding candidates in the first and second search space sets 430 of the scheduling component carrier 420 are allocated for cross-carrier scheduling of the scheduled component carrier 425. UE115-a and / or base station 105-a may identify sets of decoding candidates allocated for cross-carrier scheduling of the scheduled component carrier 425 based on the search space set linking configuration 415, the scheduling configuration 410, or both.

[0155] Furthermore, UE115-a, base station 105-a, or both, may identify decoding candidates (e.g., sets or pairs of decoding candidates) within the search space set 430 of the scheduling component carrier 420 that are linked (or not linked) for control channel iteration. In detail, if the scheduling configuration 410 indicates first and second search space sets 430 of the scheduling component carrier 420 configured for cross-carrier scheduling (e.g., search space sets 430-a, 430-b of the scheduling component carrier 420-a), then UE115-a and / or base station 105-a may identify decoding candidates within the first and second search space sets 430 that are linked (or not linked) for control channel iteration. Based on the scheduling configuration 410, the search space set linking configuration 415, or both, UE115-a, base station 105-a, or both, may identify sets or pairs of decoding candidates linked for control channel iteration.

[0156] Additionally or alternatively, UE115-a and / or base station 105-a may identify the decoding candidates (e.g., a set or pair of decoding candidates) to be linked for control channel iterations based on one or more parameters associated with each decoding candidate and / or search space set 430, including the CIF value of the decoding candidate, the candidate index, the aggregation level, etc. More specifically, UE115-a and / or base station 105-a may determine whether a set / pair of decoding candidates is linked or unlinked for cross-carrier scheduling and / or intra-carrier scheduling.

[0157] For example, referring to the first search space set linking configuration 415-a, UE 115-a may determine that pairs of decoding candidates in the first search space set 430-a and the second search space set 430-b of the scheduling component carrier 420-a (for example, pairs of decoding candidates including the first and second decoding candidates in the first search space set 430-a and the second search space set 430-b, respectively) are linked for control channel iterations based on the fact that they correspond to the same CIF value (for example, scheduling the same component carrier), the same candidate index, the same aggregation level, or any combination thereof. For example, in two linked monitoring occasions of the search space sets 430-a and 430-b of the scheduling component carrier 420-a, two PDCCH candidates in each case corresponding to the same CIF value, the same candidate index, and the same AL (corresponding to the same scheduled cell) are linked to each other for PDCCH iterations.

[0158] Conversely, UE115-a may determine that pairs of decoding candidates are not linked for control channel iterations based on the fact that pairs of decoding candidates in the first and second search space sets 430 of the scheduling component carrier 420 correspond to different CIF values ​​(e.g., scheduling different component carriers 420), different candidate indices, different aggregation levels, or any combination thereof. For example, referring to the second search space set linking configuration 415-b, UE115-a may determine that pairs of decoding candidates are not linked for control channel iterations based on the fact that pairs of decoding candidates in the first search space set 430-e and the second search space set 430-f of the scheduling component carrier 420-b correspond to different CIF values ​​(e.g., scheduling different component carriers 420), different candidate indices, different aggregation levels, or any combination thereof.

[0159] In some embodiments, sets / pairs of decoding candidates in the first and second search space sets 430 of the scheduling component carrier 420 may be linked for both intra-carrier scheduling and cross-carrier scheduling. In other embodiments, sets / pairs of decoding candidates in the first and second search space sets 430 of the scheduling component carrier 420 may be linked for intra-carrier scheduling but not for cross-carrier scheduling (e.g., not linked for cross-carrier scheduling). Conversely, in other embodiments, sets / pairs of decoding candidates in the first and second search space sets 430 of the scheduling component carrier 420 may be linked for cross-carrier scheduling but not for intra-carrier scheduling (e.g., not linked for intra-carrier scheduling). This will be further discussed in detail herein with reference to Figures 5 to 7.

[0160] In some embodiments, UE 115-a may receive control signaling from base station 105-a indicating active BWPs in each of the scheduling component carrier 420 and the scheduled component carrier 425. As previously stated herein, scheduling configuration 410 may indicate BWPs associated with search space sets 430 in scheduling component carrier 420 and the scheduled component carrier 425. For example, scheduling configuration 410 may indicate that search space sets 430-a and 430-b of scheduling component carrier 420-a are associated with a first BWP, and that search space sets 430-c and 430-d of scheduled component carrier 425-a are associated with a second BWP. Furthermore, UE115-a and / or base station 105-a may be configured to schedule communications 440 on the search space set 430 of the scheduled component carrier 425 via control channel iterations on the search space set 430 of the scheduling component carrier 420, only if the BWP associated with the search space set 430 of both the scheduling component carrier 420 and the scheduled component carrier 425 is active. That is, in some implementations, cross-carrier scheduling via control channel iterations may only be performed if the BWP for the linked search space set 430 is active on both the scheduling component carrier 420 and the scheduled component carrier 425.

[0161] For example, scheduling configuration 410 may indicate a first search space set 430-a and a second search space set 430-b of scheduling component carrier 420-a, configured for cross-carrier scheduling. In addition, search space set linking configuration 415-a may indicate that a third search space set 430-c and a fourth search space set 430-d of scheduled component carrier 425-a are linked for control channel iterations (for example, they can be scheduled via PDCCH iterations through the first search space set 430-a and the second search space set 430-b). In this example, control signaling may indicate that the first BWP associated with the first search space set 430-a and the second search space set 430-b of the scheduling component carrier 420-a is active, as well as that the second BWP associated with the third search space set 430-c and the fourth search space set 430-d of the scheduled component carrier 425-a is active. In this example, based on the fact that both the first and second BWPs are active in the scheduling component carrier 420-a and the scheduled component carrier 425-a, cross-carrier scheduling of the scheduled component carrier 425-a may be performed on the scheduling component carrier 420-a via PDCCH iterations.

[0162] In some embodiments, UE115-a may monitor decryption candidates in the search space set 430 of the scheduling component carrier 420. More specifically, UE115-a may monitor decryption candidates in the search space set 430 of the scheduling component carrier 420 for one or more iterations of control message 435 that schedule communications 440 on the scheduled component carrier 425, based on the scheduling configuration 410 and / or the search space set linking configuration 415. In this regard, UE115-a may monitor decryption candidates based on (for example, accordingly to) the scheduling configuration 410, the search space set linking configuration 415, or both.

[0163] As an addition or alternative, UE115-a may monitor the search space set 430 of the scheduling component carrier 420 based on the determination that the decoding candidate is linked (or unlinked) for cross-carrier and / or intra-carrier scheduling, and the search space set 430 of the scheduling component carrier 420 based on the determination that the BWP of each search space set 430 is active in both the scheduling component carrier 420 and the scheduled component carrier 425, or in any combination thereof.

[0164] For example, referring to the first search space set linking configuration 415-a, the first search space set 430-a and the second search space set 430-b in the scheduling component carrier 420-a, which are linked for control channel iterations, may each contain first and second decoding candidates, linked for cross-carrier scheduling and control message 435 iterations, respectively. In this example, UE 115-a may monitor first and second decoding candidates for one or more iterations of control message 435 that schedule communication 440 on the scheduled component carrier 425-a (e.g., one or more iterations of the same control message 435). As another example, the first search space set 430-a and the second search space set 430-b in the scheduling component carrier 420-a, which may not be linked for control channel iterations, may each contain first and second decoding candidates. In this example, UE115-a may monitor a first decoding candidate for the first control message 435 and a second decoding candidate for the second control message 435, which is different from the first decoding candidate, based on the fact that the first and second search space sets 430 are not linked for control channel iterations.

[0165] In some embodiments, UE115-a may receive a first control message 435-a (e.g., a first iteration of the control message 435-a) from base station 105-a. In some embodiments, control message 435-a may schedule communication 440 between UE115-a and base station 105-a on the scheduled component carrier 425. The communication 440 scheduled by control message 435-a may include a PDSCH transmission, a PUSCH transmission, or both. Thus, control message 435-a may indicate a semi-persistent scheduling (SPS) release and / or a configured grant release (e.g., an uplink type 2 configured grant) on the scheduled component carrier 425. Control message 435-a may include DCI messages (e.g., DCI formats 0_1, 0_2, 1_1, and / or 1_2).

[0166] In some embodiments, UE115-a may receive a first control message 435-a (e.g., a first iteration of the control message 435-a) within a decoded candidate of a search space set 430 associated with the scheduling component carrier 420. Furthermore, UE115-a may receive a first iteration of the control message 435-a within a first decoded candidate of the first search space set 430 (e.g., a first search space set 430-a), which is linked to a second decoded candidate of a second search space set 430 (e.g., a second search space set 430-b) that is either linked to the first search space set 430 for control channel iterations or not. In this regard, UE115-a may receive a first iteration of the control message 435-a based on (e.g., in accordance with) the scheduling configuration 410 and / or the search space set linking configuration 415.

[0167] In some implementations, UE115-a may receive a second control message 435-b (e.g., a second iteration of the control message 435-b) from base station 105-a. In some embodiments, the second control message 435-b may schedule communication 440 (e.g., PDSCH / SPS release, PDSCH / configured grant release) between UE115-a and base station 105-a on a first component carrier (e.g., scheduled component carrier 425). The control message 435-b may include DCI messages (e.g., DCI formats 0_1, 0_2, 1_1, and / or 1_2).

[0168] Depending on whether the search space set 430 and decoded candidates of the scheduling component carrier 420 are linked or not for control channel iterations, control messages 435-a and 435-b may contain the same or different payloads. For example, if the search space set 430 of the scheduling component carrier 420 is linked for control channel iterations, the second iteration of the control message 435-b may contain the same data payload and schedule the same communication 440 compared to the first iteration of the control message 435-a. As another example, if the search space set 430 of the scheduling component carrier 420 is not linked for control channel iterations, the second control message 435-b may contain a different data payload and schedule a different communication 440 compared to the first iteration of the control message 435-a.

[0169] In some embodiments, UE115-a may receive a second control message 435-b (e.g., a second repetition of the control message 435-b) within a decoded candidate of a search space set 430 associated with the scheduling component carrier 420. Furthermore, UE115-a may receive a second repetition of the control message 435-b within a second decoded candidate of a second search space set 430 (e.g., search space set 430-b) which is linked to a first decoded candidate of a first search space set 430 (e.g., first search space set 430-a) that is either linked to the first search space set 430 for control channel repetitions or not. In this regard, UE115-a may receive a second repetition of the control message 435-b based on (e.g., in accordance with) the scheduling configuration 410 and / or the search space set linking configuration 415.

[0170] In some cases, UE115-a may receive both the first repetition 435-a and the second repetition 435-b of the control message. In other cases, UE115-a may receive only one of the first repetition 435-a or the second repetition 435-b of the control message. If UE115-a receives only the first or second repetition of the control message 435, UE115-a may demodulate / decode a single received repetition of the control message 435. In other cases where UE115-a receives both the first repetition 435-a and the second repetition 435-b of the control message, UE115-a may demodulate / decode only one of the first or second repetitions of the control message 435. As an addition or alternative, UE115-a may combine the first repetition 435-a and the second repetition 435-b of the control message.

[0171] For example, UE115-a may perform soft synthesis of a first repetition 435-a of a control message and a second repetition 435-b of a control message. In some embodiments, UE115-a may perform soft synthesis (e.g., perform one or more soft synthesis procedures) to demodulate / decode the repetitions 435-a and 435-b of the control message. In detail, UE115-a may perform soft synthesis of a first signal (e.g., a first repetition 435-a of a control message) received in the first search space set 430 with a second signal (e.g., a second repetition 435-b of a control message) received in the second search space set 430, which is linked to the first search space set for the control channel repetition.

[0172] Subsequently, UE115-a may perform (e.g., send, receive) communications 440 scheduled by one or more control messages 435-a, 435-b on the scheduled component carrier 425. For example, if the scheduled communications 440 includes a PUSCH transmission, UE115-a may send the scheduled PUSCH transmission to base station 105-a on the scheduled component carrier 425. As another example, if the scheduled communications 440 includes a PDSCH transmission, UE115-a may receive the scheduled PDSCH transmission from base station 105-a on the scheduled component carrier 425.

[0173] The techniques described herein may provide improved cross-carrier scheduling. More specifically, the techniques described herein may enable the use of PDCCH iterations in the context of cross-carrier scheduling, thereby enabling a search space set 430 on a scheduled component carrier 425 to be scheduled via signaling transmitted / received on a linked search space set 430 of a scheduling component carrier 420. By enabling PDCCH iterations in the context of cross-carrier scheduling, the techniques described herein may improve the transmission diversity of control messages 435 used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0174] Figure 5 shows an example of a resource configuration 500 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. An aspect of resource configuration 500 may implement, or be implemented by, a wireless communication system 100, resource configuration 200, resource configuration 300, wireless communication system 400, or any combination thereof.

[0175] In some embodiments, UE115 may receive / identify a scheduling configuration for cross-carrier scheduling, which indicates a scheduling component carrier 505-a and a scheduled component carrier 505-b. As shown in Figure 5, the scheduling component carrier 505-a may include search space sets 510-a, 510-b, 510-c, and 510-d. Similarly, the scheduled component carrier 505-b may include search space sets 510-e, 510-f, 510-g, and 510-h. In some embodiments, control signaling received on the scheduling component carrier 505-a may be used to schedule communications on the scheduled component carrier 505-b (e.g., cross-carrier scheduling).

[0176] In some embodiments, due to the fact that the scheduled component carrier 505-b is scheduled via control signaling on the scheduling component carrier 505-a, the search space set 510 of the scheduled component carrier 505-b may not actually be monitored by the UE 115 and may therefore be referred to as a "dummy" search space set 510. In some implementations, the configuration for the search space set 510 of the scheduled component carrier 505-b may only include the number of decryption candidates per aggregation level.

[0177] Each search space set 510 within each component carrier 505 may be associated with one or more BWPs. For example, referring to the scheduling component carrier 505-a, the first search space set 510-a and the second search space set 510-b may be associated with the first BWP of the scheduling component carrier 505-a, and search space sets 510-c and 510-d may be associated with the second BWP of the scheduling component carrier 505-a. As another example, referring to the scheduled component carrier 505-b, the first search space set 510-e and the second search space set 510-f may be associated with the first BWP of the scheduled component carrier 505-b, and search space sets 510-g and 510-h may be associated with the second BWP of the scheduled component carrier 505-b. In some implementations, the first BWP of the scheduling component carrier 505-a, which includes a first search space set 510-a and a second search space set 510-b, may differ from the first BWP of the scheduled component carrier 505-b, which includes a first search space set 510-e and a second search space set 510-f.

[0178] In some embodiments, the first search space set 510-a and the second search space set 510-b of the scheduling component carrier 505-a may include monitoring occasions containing decryption candidates (e.g., PDCCH candidates) configured for self-scheduling, cross-carrier scheduling, or both. For example, the first search space set 510-a may include a first monitoring occasion 515-a linked for control channel iterations to a second monitoring occasion 515-b associated with the second search space set 510-b. The first monitoring occasion 515-a may include a first set 520-a of decryption candidates, and the second monitoring occasion 515-b may include a second set 520-b of decryption candidates. Each of the monitoring occasions 515 may include a subset 520 of decryption candidates configured for in-carrier scheduling (e.g., self-scheduling) and a subset of decryption candidates configured for cross-carrier scheduling.

[0179] In this regard, control signaling performed on a first subset of decoding candidates configured for intra-carrier scheduling may be used to schedule communications on scheduling component carrier 505-a, whereas control signaling performed on a second subset of decoding candidates configured for cross-carrier scheduling may be used to schedule communications on scheduled component carrier 505-b. In some embodiments, decoding candidates in sets 520-a, 520-b configured for intra-carrier scheduling may be associated with a first CIF value (e.g., CIF=0), while decoding candidates in sets 520-a, 520-b configured for cross-carrier scheduling may be associated with a second CIF value (e.g., CIF=1).

[0180] The first search space set 510-a (e.g., searchSpaceId 1) and the second search space set 510-b (e.g., searchSpaceId 4) of the scheduling component carrier 505-a may be linked to each other for control channel iterations to schedule the scheduled component carrier 505-b. That is, multiple iterations of the same control message (e.g., the same DCI message) may be sent / received in the first search space set 510-a and the second search space set 510-b, where multiple iterations of the same control message schedule communication on the scheduled component carrier 505-b.

[0181] In some embodiments, the first search space set 510-e (e.g., searchSpaceId 1) and the second search space set 510-f (e.g., searchSpaceId 4) (e.g., dummy search space set 510 on the scheduled component carrier 505-b) of the scheduled component carrier 505-b may be linked to each other for control channel iterations, based on the fact that the first search space set 510-a and the second search space set 510-b of the scheduling component carrier 505-a are linked for control channel iterations. Furthermore, based on the fact that the first search space set 510-e and the second search space set 510-f of the scheduled component carrier 505-b are associated with the same search space set index as the first search space set 510-a and the second search space set 510-b of the scheduling component carrier 505-a, the first search space set 510-e and the second search space set 510-f may be linked to each other for control channel iterations. In other words, based on the fact that a search space set 510 having the same search space set index (e.g., searchSpaceId 1, searchSpaceId 4) is located within both the scheduling component carrier 505-a and the scheduled component carrier 505-b, the first search space set 510-a and the second search space set 510-b of the scheduling component carrier 505-a, as well as the first search space set 510-e and the second search space set 510-f of the scheduled component carrier, can be linked for control channel iterations.

[0182] As shown in resource configuration 500, linked monitoring occasions 515-a and 515-b associated with the first search space set 510-a and the second search space set 510-b may contain sets (e.g., pairs) of linked decryption candidates corresponding to the same CIF value. Furthermore, linked monitoring occasions 515-a and 515-b may contain sets (e.g., pairs) of linked decryption candidates corresponding to the same candidate index, the same aggregation level, or both. In addition, since the first search space set 510-a and the second search space set 510-b are linked to each other for control channel iterations, the first search space set 510-a and the second search space set 510-b may consist of the same number of decryption candidates per aggregation level. For example, the first monitoring occasion 515-a and the second monitoring occasion 515-b may include the same amount of decryption candidates linked for in-carrier scheduling and the same amount of decryption candidates linked for cross-carrier scheduling.

[0183] In some embodiments, the UE 115 may be configured to apply the linked search space sets 510-a, 510-b used to schedule the scheduled component carrier 505-b (for example, by monitoring the decryption candidates corresponding to the scheduled component carrier 505-b) only if the downlink BWPs configured in the scheduling component carrier 505-a are active and the downlink BWPs configured in the scheduled component carrier 505-b are active. In other words, UE115 may be configured to monitor the first search space set 510-a and the second search space set 510-b of scheduling component carrier 505-a for control scheduling that schedules communications within the first search space set 510-e and the second search space set 510-f of scheduled component carrier 505-b, only when the first BWP associated with the first search space set 510-a and the second search space set 510-b of scheduling component carrier 505-a is active, and the second BWP associated with the first search space set 510-e and the second search space set 510-f of scheduled component carrier 505-b is active.

[0184] Therefore, each linked search space set 510 in the scheduling component carrier 505-a and the scheduled component carrier 505-b can be associated with the same BWP. That is, the first search space set 510-a and the second search space set 510-b can be associated with the first BWP, and the first search space set 510-e and the second search space set 510-f can be associated with the second BWP, where the first and second BWPs can be different.

[0185] Figure 6 shows an example of a resource configuration 600 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. An aspect of resource configuration 600 may implement, or be implemented by, a wireless communication system 100, resource configuration 200, resource configuration 300, wireless communication system 400, or any combination thereof.

[0186] In some embodiments, UE115 may receive / identify a scheduling configuration for cross-carrier scheduling, which indicates a scheduling component carrier 605-a and a scheduled component carrier 605-b. As shown in Figure 6, the scheduling component carrier 605-a may include search space sets 610-a, 610-b, 610-c, and 610-d. Similarly, the scheduled component carrier 605-b may include search space sets 610-e, 610-f, 610-g, and 610-h. In some embodiments, control signaling received on the scheduling component carrier 605-a may be used to schedule communications on the scheduled component carrier 605-b (e.g., cross-carrier scheduling).

[0187] In some embodiments, due to the fact that the scheduled component carrier 605-b is scheduled via control signaling on the scheduling component carrier 605-a, the search space set 610 of the scheduled component carrier 605-b may not actually be monitored by the UE115 and may therefore be referred to as a "dummy" search space set 610. In some implementations, the configuration for the search space set 610 of the scheduled component carrier 605-b may only include the number of decryption candidates per aggregation level.

[0188] Each search space set 610 within each component carrier 605 may be associated with one or more BWPs. For example, referring to the scheduling component carrier 605-a, the first search space set 610-a and the second search space set 610-b may be associated with the first BWP of the scheduling component carrier 605-a, and search space sets 610-c and 610-d may be associated with the second BWP of the scheduling component carrier 605-a. As another example, referring to the scheduled component carrier 605-b, the first search space set 610-e and the second search space set 610-f may be associated with the first BWP of the scheduled component carrier 605-b, and search space sets 610-g and 610-h may be associated with the second BWP of the scheduled component carrier 605-b. In some implementations, the first BWP of the scheduling component carrier 605-a, which includes a first search space set 610-a and a second search space set 610-b, may differ from the first BWP of the scheduled component carrier 605-b, which includes a first search space set 610-e and a second search space set 610-f.

[0189] In some embodiments, the first search space set 610-a and the second search space set 610-b of the scheduling component carrier 605-a may include monitoring occasions containing decryption candidates (e.g., PDCCH candidates) configured for self-scheduling, cross-carrier scheduling, or both. For example, the first search space set 610-a may include a first monitoring occasion 615-a linked for control channel iterations to a second monitoring occasion 615-b associated with the second search space set 610-b. The first monitoring occasion 615-a may include a first set 620-a of decryption candidates, and the second monitoring occasion 615-b may include a second set 620-b of decryption candidates. Each of the monitoring occasions 615 may include a subset 620 of decryption candidates configured for in-carrier scheduling (e.g., self-scheduling) and a subset of decryption candidates configured for cross-carrier scheduling.

[0190] In this regard, control signaling performed on a first subset of decoding candidates configured for intra-carrier scheduling may be used to schedule communications on scheduling component carrier 605-a, whereas control signaling performed on a second subset of decoding candidates configured for cross-carrier scheduling may be used to schedule communications on scheduled component carrier 605-b. In some embodiments, decoding candidates in sets 620-a and 620-b configured for intra-carrier scheduling may be associated with a first CIF value (e.g., CIF=0), while decoding candidates in sets 620-a and 620-b configured for cross-carrier scheduling may be associated with a second CIF value (e.g., CIF=1).

[0191] The first search space set 610-a (e.g., searchSpaceId 1) and the second search space set 610-b (e.g., searchSpaceId 4) of the scheduling component carrier 605-a may be linked to each other for control channel iterations to schedule the scheduled component carrier 605-b. That is, multiple iterations of the same control message (e.g., the same DCI message) may be sent / received in the first search space set 610-a and the second search space set 610-b, where multiple iterations of the same control message schedule communication on the scheduled component carrier 605-b.

[0192] In some embodiments, the first search space set 610-e (e.g., searchSpaceId 1) and the second search space set 610-f (e.g., searchSpaceId 4) (e.g., dummy search space set 610 on the scheduled component carrier 605-b) of the scheduled component carrier 605-b may not be linked to each other for control channel iterations, even though the first search space set 610-a and the second search space set 610-b of the scheduling component carrier 605-a are linked for control channel iterations (e.g., they may not be linked at all). In some cases, based on the fact that the first search space set 610-a and the second search space set 610-b of the scheduling component carrier 605-a are linked for control channel iterations, the first search space set 610-e and the second search space set 610-f of the scheduled component carrier 605-b may not be linked for control channel iterations.

[0193] In such cases, decoded candidates configured for in-carrier scheduling (e.g., CIF=0) within monitoring occasions 615-a and 615-b of the linked search space sets 610-a and 610-b of the scheduling component carrier 605-a may be linked for control channel iterations. Thus, iterations of the same control message scheduling communication on the scheduling component carrier 605-a may be sent / received within the linked decoded candidates of the first monitoring occasion 615-a and the second monitoring occasion 615-b. More specifically, sets of decoded candidates within the first monitoring occasion 615-a and the second monitoring occasion 615-b may be linked for control channel iterations for self-scheduling, based on the fact that the sets of decoded candidates within the first monitoring occasion 615-a and the second monitoring occasion 615-b are associated with the same CIF value, the same candidate index, and the same aggregation level. Therefore, the first monitoring occasions 615-a and the second monitoring occasions 615-b associated with the first search space set 610-a and the second search space set 610-b may contain the same number of decryption candidates configured for self-scheduling.

[0194] In contrast, decryption candidates configured for cross-carrier scheduling (e.g., CIF=1) within monitoring occasions 615-a and 615-b of linked search space sets 610-a and 610-b may not be linked for control channel iterations. In other words, multiple iterations of the same control message scheduling communication on scheduled component carrier 605-b may not be transmitted / received within unlinked decryption candidates configured for cross-carrier scheduling. Therefore, UE115 may be configured to individually monitor decryption candidates configured for cross-carrier scheduling (e.g., for each individual, distinct control message scheduling communication on scheduled component carrier 605-b, monitor each decryption candidate).

[0195] Due to the fact that the decryption candidates configured for cross-carrier scheduling within monitoring occasions 615-a and 615-b are not linked for control channel iterations, the first search space set 610-a and the second search space set 610-b of the scheduling component carrier 605-a may consist of different numbers of decryption candidates configured for cross-carrier scheduling per aggregation level. For example, as shown in resource configuration 600, the first monitoring occasion 615-a and the second monitoring occasion 615-b may include different numbers of decryption candidates configured for cross-carrier scheduling (e.g., without one-to-one mapping of cross-carrier decryption candidates).

[0196] Figure 7 shows an example of a resource configuration 700 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. An aspect of resource configuration 700 may implement, or be implemented by, a wireless communication system 100, resource configuration 200, resource configuration 300, wireless communication system 400, or any combination thereof.

[0197] In some embodiments, UE115 may receive / identify a scheduling configuration for cross-carrier scheduling, which indicates a scheduling component carrier 705-a and a scheduled component carrier 705-b. As shown in Figure 7, the scheduling component carrier 705-a may include search space sets 710-a, 710-b, 710-c, and 710-d. Similarly, the scheduled component carrier 705-b may include search space sets 710-e, 710-f, 710-g, and 710-h. In some embodiments, control signaling received on the scheduling component carrier 705-a may be used to schedule communications on the scheduled component carrier 705-b (e.g., cross-carrier scheduling).

[0198] In some embodiments, due to the fact that the scheduled component carrier 705-b is scheduled via control signaling on the scheduling component carrier 705-a, the search space set 710 of the scheduled component carrier 705-b may not actually be monitored by the UE 115 and may therefore be referred to as a "dummy" search space set 710. In some implementations, the configuration for the search space set 710 of the scheduled component carrier 705-b may only include the number of decryption candidates per aggregation level.

[0199] Each search space set 710 within each component carrier 705 may be associated with one or more BWPs. For example, referring to the scheduling component carrier 705-a, the first search space set 710-a and the second search space set 710-b may be associated with the first BWP of the scheduling component carrier 705-a, and search space sets 710-c and 710-d may be associated with the second BWP of the scheduling component carrier 705-a. As another example, referring to the scheduled component carrier 705-b, the first search space set 710-e and the second search space set 710-f may be associated with the first BWP of the scheduled component carrier 705-b, and search space sets 710-g and 710-h may be associated with the second BWP of the scheduled component carrier 705-b. In some implementations, the first BWP of the scheduling component carrier 705-a, which includes a first search space set 710-a and a second search space set 710-b, may differ from the first BWP of the scheduled component carrier 705-b, which includes a first search space set 710-e and a second search space set 710-f.

[0200] In some embodiments, the first search space set 710-a and the second search space set 710-b of the scheduling component carrier 705-a may include monitoring occasions containing decryption candidates (e.g., PDCCH candidates) configured for self-scheduling, cross-carrier scheduling, or both. For example, the first search space set 710-a may include a first monitoring occasion 715-a, and the second search space set 710-b may include a second monitoring occasion 715-b. The first monitoring occasion 715-a may include a first set 720-a of decryption candidates, and the second monitoring occasion 715-b may include a second set 720-b of decryption candidates. Each of the monitoring occasions 715 may include a subset 720 of decryption candidates configured for in-carrier scheduling (e.g., self-scheduling) and a subset of decryption candidates configured for cross-carrier scheduling.

[0201] In this regard, control signaling performed on a first subset of decoding candidates configured for intra-carrier scheduling may be used to schedule communications on a scheduling component carrier 705-a, whereas control signaling performed on a second subset of decoding candidates configured for cross-carrier scheduling may be used to schedule communications on a scheduled component carrier 705-b. In some embodiments, decoding candidates in sets 720-a and 720-b configured for intra-carrier scheduling may be associated with a first CIF value (e.g., CIF=0), while decoding candidates in sets 720-a and 720-b configured for cross-carrier scheduling may be associated with a second CIF value (e.g., CIF=1).

[0202] In some embodiments, the first search space set 710-e (e.g., searchSpaceId 1) and the second search space set 710-f (e.g., searchSpaceId 4) of the scheduled component carrier 705-b may be linked to each other for control channel iterations. That is, multiple iterations of the same control message (e.g., the same DCI message) may be used to schedule communications within the first search space set 710-e and the second search space set 710-f of the scheduled component carrier 705-b.

[0203] In some embodiments, the first search space set 710-a (e.g., searchSpaceId 1) and the second search space set 710-b (e.g., searchSpaceId 4) of the scheduling component carrier 705-a may not be linked to each other for control channel iterations, even though the first search space set 710-e and the second search space set 710-f of the scheduled component carrier 705-b are linked for control channel iterations (e.g., they may not be linked at all).

[0204] In such cases, the decoded candidates configured for in-carrier scheduling (e.g., CIF=0) within the monitoring occasions 715-a and 715-b of the linked search space sets 710-a and 710-b of the scheduling component carrier 705-a may not be linked for control channel iterations. Therefore, iterations of the same control message scheduling communication on the scheduling component carrier 705-a cannot be transmitted / received within the unlinked decoded candidates of the first monitoring occasion 715-a and the second monitoring occasion 715-b. Thus, UE115 may be configured to monitor the unlinked decoded candidates configured for self-scheduling individually. Furthermore, since the decoded candidates configured for self-scheduling are unlinked, the first monitoring occasions 715-a and the second monitoring occasion 715-b associated with the first search space set 710-a and the second search space set 710-b may contain a different number of decoded candidates configured for self-scheduling, as shown in Figure 7.

[0205] In comparison, decryption candidates configured for cross-carrier scheduling (e.g., CIF=1) within monitoring occasions 715-a and 715-b of linked search space sets 710-a and 710-b can be linked for control channel iterations. In other words, multiple iterations of the same control message scheduling communication on the scheduled component carrier 705-b can be sent / received within linked decryption candidates configured for cross-carrier scheduling. More specifically, sets of decryption candidates can be linked for control channel iterations for cross-carrier scheduling, based on the fact that sets of decryption candidates within the first monitoring occasion 715-a and the second monitoring occasion 715-b are associated with the same CIF value, the same candidate index, and the same aggregation level.

[0206] Therefore, UE115 can anticipate that the first search space set 710-a and the second search space set 710-b in the scheduling component carrier 705-a consist of the same DCI format, the same period, the same slot offset (e.g., for in-slot iterations), and the same number of monitoring occasions per slot for monitoring. Furthermore, UE115 may be configured to monitor linked decoded candidates configured for cross-carrier scheduling for iterations of the same control message (e.g., DCI message) that schedule communications within the scheduled component carrier 705-b (e.g., within the first search space set 710-e and the second search space set 710-f of the scheduled component carrier 705-b).

[0207] Due to the fact that the decryption candidates configured for cross-carrier scheduling within monitoring occasions 715-a and 715-b are linked for control channel iterations, the first search space set 710-a and the second search space set 710-b of the scheduling component carrier 705-a may consist of the same number of decryption candidates configured for cross-carrier scheduling per aggregation level. For example, as shown in resource configuration 700, the first monitoring occasion 715-a and the second monitoring occasion 715-b may include the same number of decryption candidates configured for cross-carrier scheduling (e.g., one-to-one mappings of cross-carrier decryption candidates).

[0208] Figure 8 shows an example of a process flow 800 that supports a technique for control channel iterations for cross-carrier scheduling according to aspects of the present disclosure. In some examples, the process flow 800 implements or can implement aspects of wireless communication system 100, resource configuration 200, resource configuration 300, wireless communication system 400, resource configuration 500, resource configuration 600, resource configuration 700, or any combination thereof. For example, the process flow 800 may show that UE115-b receives a scheduling configuration for cross-carrier scheduling of a first component carrier, receives at least one iteration of a control message according to the scheduling configuration, and performs the communication scheduled by at least one iteration of the control message on the first component carrier, as described with reference to Figures 1 to 7.

[0209] In some cases, process flow 800 may include UE115-b and base station 105-b, which may be examples of the corresponding devices described herein. In particular, the UE115-b and base station 105-b shown in Figure 8 may include the example of UE115-a and base station 105-a shown in Figure 4.

[0210] In some examples, the operation shown in process flow 800 may be performed by hardware (e.g., circuits, processing blocks, logic components, and other components), code executed by the processor (e.g., software), or any combination thereof. The following alternative examples may be implemented, in which some steps are performed in a different order than described, or not performed at all. In some cases, the steps may include additional features not mentioned below, or further steps may be added.

[0211] In 805, UE115-b may receive control signaling (e.g., RRC messages, DCI messages) from base station 105-b. In some embodiments, the control signaling may indicate a set of component carriers (e.g., cell groups) configured for cross-carrier scheduling. More specifically, the control signaling may indicate a set of component carriers configured for cross-carrier scheduling via control channel iterations (e.g., PDCCH iterations).

[0212] For example, UE115-b may receive RRC signaling indicating a set of component carriers (e.g., a cell group) containing a scheduled component carrier configured for cross-carrier scheduling via a control channel iteration. Alternatively, UE115-b may receive RRC signaling indicating a set of component carriers containing a scheduled component carrier configured for cross-carrier scheduling via a control channel iteration on a scheduling component carrier. In this regard, the RRC signaling may indicate that cross-carrier scheduling via a control channel iteration on a specified scheduling component carrier applies to all component carriers within the set of component carriers (e.g., within a cell group). Additionally or alternatively, the control signaling may indicate that a set of component carriers is configured for cross-carrier scheduling via a control channel iteration on a given BWP (e.g., a downlink BWP) of the scheduling component carrier. In other cases, the control signaling may indicate that a set of search spaces within the downlink BWP of the scheduled component carrier is configured for cross-carrier scheduling via a control channel iteration.

[0213] In 810, UE115-b may receive control signaling (e.g., RRC messages, DCI messages) from base station 105-b that identifies a scheduling configuration for scheduling communications on UE115-b. In some embodiments, the scheduling configuration may represent a first set and a second set of scheduling component carriers that are available for scheduling communications on the scheduled component carrier. In this regard, the scheduling configuration may represent a configuration for cross-carrier scheduling, where the scheduled component carrier can be scheduled via communications received on the scheduling component carrier's search space set. The scheduling configuration may represent any number of search space sets on the scheduling component carrier that can be used to schedule communications on the scheduled component carrier.

[0214] In some embodiments, the search space set of a scheduling component carrier may include decryption candidates allocated for cross-carrier scheduling, intra-carrier scheduling, or both. Each decryption candidate may be associated with a CIF value indicating whether it is configured for cross-carrier scheduling or intra-carrier scheduling. For example, a decryption candidate associated with a first CIF value (e.g., CIF=0) may be configured for intra-carrier scheduling (e.g., scheduling communications on a scheduling component carrier), while a decryption candidate associated with a second CIF value (e.g., CIF=1) may be configured for cross-carrier scheduling (e.g., scheduling communications on a scheduled component carrier).

[0215] Based on receiving control signaling at 805, UE115-b may receive control signaling indicating a scheduling configuration at 810. Additionally or alternatively, the control signaling indicated at 805 and the control signaling indicated at 810 may be communicated within the same control signaling (e.g., via the same RRC message). Furthermore, in some cases, UE115-b may be configured with a scheduling configuration (e.g., pre-configured) and thus configured to identify the scheduling configuration without control signaling from base station 105-b.

[0216] In some embodiments, the control signaling in 810 may further indicate one or more parameters associated with the scheduling configuration, including a set of monitoring occasions associated with each search space set, a search space set index associated with the search space sets on the scheduling component carrier and / or scheduled component carrier, and a BWP associated with each search space set.

[0217] For example, the control signaling in 810 may indicate a first search space set index associated with a first search space set of the scheduling component carrier, and a second search space set index associated with a second search space set of the scheduling component carrier. As another example, the control signaling including the scheduling configuration may indicate search space set indices associated with a third and a fourth search space set of the scheduled component carrier. The search space sets of the scheduled component carrier may be associated with the same or different search space set indices as the search space sets of the scheduling component carrier. For example, continuing the same example above, the first search space set of the scheduling component carrier and the third search space set of the scheduled component carrier may be associated with the same search space set index, and the second search space set of the scheduling component carrier and the fourth search space set of the scheduled component carrier may be associated with the same search space set index.

[0218] In some embodiments, the control signaling indicating the scheduling configuration may, additionally or alternatively, indicate the BWPs of the respective search space sets of the scheduling component carrier, the scheduled component carrier, or both. For example, the control signaling may indicate that the first and second search space sets of the scheduling component carrier are configured within the first BWP of the scheduling component carrier. Similarly, the control signaling may indicate that at least two search space sets of the scheduled component carrier (e.g., a third and a fourth search space set) are configured within the second BWP of the scheduled component carrier. In some embodiments, the first BWP of the scheduling component carrier and the second BWP of the scheduled component carrier may be different.

[0219] At 815, UE115-b may receive control signaling (e.g., RRC messages, DCI messages) from base station 105-b indicating a search space set linking configuration for a set of search space sets of scheduled component carriers. Based on receiving control signaling at 805, control signaling including scheduling configuration at 810, or both, UE115-b may receive control signaling indicating a search space set linking configuration at 815. Additionally or alternatively, the control signaling indicated at 805, 810, 815, or any combination thereof, may be communicated within the same control signaling (e.g., via the same RRC message). Furthermore, in some cases, UE115-b may be configured (e.g., pre-configured) with a search space set linking configuration.

[0220] At 820, UE115-b, base station 105-b, or both may identify a search space set-linking configuration. In some embodiments, UE115-b and / or base station 105-b may identify a search space set-linking configuration based on transmitting / receiving control signaling indicating a search space set-linking configuration at 815. Additionally or alternatively, UE115-b may identify a search space set-linking configuration at 820 based on transmitting / receiving control signaling at 805, transmitting / receiving control signaling at 810, or both. Furthermore, in some cases, UE115-b may be configured with a search space set-linking configuration (e.g., pre-configured) and therefore may be configured to identify a search space set-linking configuration without control signaling from base station 105-b.

[0221] In some embodiments, the search space set linking configuration may indicate whether or not search space sets on a scheduled component carrier are linked for control channel iterations. That is, the search space set linking configuration may indicate whether or not control channel iterations on the search space sets of a scheduling component carrier can be used to schedule communications within the search space sets of the scheduled component carrier. If two or more search space sets on a scheduled component carrier are linked for control channel iterations, the control channel iterations on the scheduling component carrier can be used to schedule communications on two or more search space sets of the scheduled component carrier. Conversely, if two or more search space sets on a scheduled component carrier are not linked for control channel iterations (e.g., not linked), the control channel iterations on the scheduling component carrier may not be used to schedule communications on two or more search space sets of the scheduled component carrier. In some embodiments, due to the fact that scheduled component carriers are scheduled via control signaling on the scheduling component carrier, the search space set of the scheduled component carrier may not actually be monitored by UE115-b and may therefore be referred to as a “dummy” search space set.

[0222] Therefore, by identifying the search space set linking configuration, the UE115-b and base station 105-b may be configured to identify whether the search space set of a scheduled component carrier is linked or unlinked for control channel iterations. In some embodiments, the UE115-b and / or base station 105-b may identify whether the search space set of a scheduled component carrier is linked or unlinked for control channel iterations based on explicit signaling, scheduling configuration, the search space set index associated with the search space set of the scheduling component carrier and / or scheduled component carrier, the amount of decoded candidates per aggregation level, predefined rules, or any combination thereof.

[0223] For example, in some cases, UE115-b and / or base station 105-b may identify that two or more search space sets of a scheduled component carrier are linked for control channel iterations, based on a scheduling configuration that indicates that the first and second search space sets of the scheduling component carrier are linked for control channel iterations. In other words, the search space sets of a scheduled component carrier may be linked (or not linked) for PDCCH iterations, based on whether the search space sets of the scheduling component carrier are linked (or not linked) for PDCCH iterations. In other implementations, the search space sets of a scheduled component carrier may not be linked for control channel iterations, even though the search space sets of the scheduling component carrier are linked for control channel iterations. In such cases, UE115-b and / or base station 105-b may determine that two or more search space sets of the scheduled component carrier are not linked (e.g., not linked) for control channel iterations, despite a scheduling configuration that indicates that the first and second search space sets of the scheduling component carrier are linked for control channel iterations.

[0224] As an addition or alternative, UE115-b and / or base station 105-b may identify that the search space sets in the scheduled component carrier are linked for control channel iterations, based on the fact that the search space sets in the scheduling component carrier and the scheduled component carrier are associated with a common search space set index. For example, UE115-b and / or base station 105-b may identify that two or more search space sets in the scheduled component carrier are linked for control channel iterations, based on the fact that two or more search space sets in the scheduled component carrier are associated with a search space set index that is the same as the search space set index for the search space sets in the scheduling component carrier, respectively. For example, the first and second search space sets in the scheduling component carrier may be associated with the first and second search space set indices, respectively. In this example, UE115-b may determine that the third and fourth search space sets are linked for control channel iterations, based on the determination that the third and fourth search space sets of the scheduled component carrier are associated with the first and second search space set indices, respectively.

[0225] In some embodiments, UE115-b and / or base station 105-b may determine whether a scheduled component carrier's search space set is linked or not for control channel iterations based on the amount of decoded candidates per aggregation level within each search space set. For example, UE115-b and / or base station 105-b may identify that a third and fourth search space set of the scheduled component carrier is linked for control channel iterations based on the fact that the third and fourth search space sets consist of the same amount of decoded candidates per aggregation level. In other words, the third and fourth search space sets may be linked for PDCCH iterations based on the fact that each search space set has a one-to-one mapping of decoded candidates within each aggregation level.

[0226] In 825, UE115-b, base station 105-b, or both, can identify sets of decoding candidates in the first and second search space sets of the scheduling component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier. As previously stated herein, the search space sets of the scheduling component carrier may include decoding candidates allocated for cross-carrier scheduling, intra-carrier scheduling, or both. In this regard, in 825, UE115-b and / or base station 105-b may be configured to identify which decoding candidates in the first and second search space sets of the scheduling component carrier are allocated for cross-carrier scheduling of the scheduled component carrier.

[0227] UE115-b and / or base station 105-b may identify a set of decoding candidates to be allocated for cross-carrier scheduling of scheduled component carriers based on a search space set linking configuration, a scheduling configuration, or both. In this regard, UE115-b and / or base station 105-b may identify a set of decoding candidates to be allocated for cross-carrier scheduling at 825 based on transmitting / receiving control signaling at 805, 810, 815, or any combination thereof.

[0228] In 830, UE115-b, base station 105-b, or both, may identify decoding candidates (e.g., a set or pair of decoding candidates) in the search space set of scheduling component carriers that are linked (or unlinked) for control channel iteration. More specifically, if the scheduling configuration indicates first and second search space sets of scheduling component carriers configured for cross-carrier scheduling, UE115-b and / or base station 105-b may identify decoding candidates in the first and second search space sets that are linked (or unlinked) for control channel iteration.

[0229] UE115-b, base station 105-b, or both, may identify a set or pair of decoding candidates linked for control channel iteration at 830 based on a scheduling configuration, a search space set linking configuration, or both. Thus, UE115-b and / or base station 105-b may identify decoding candidates linked for control channel iteration based on transmitting / receiving control signaling at 805, 810, and / or 815, identifying a search space set linking configuration at 820, identifying decoding candidates configured for cross-carrier scheduling at 825, or any combination thereof.

[0230] Additionally or alternatively, UE115-b and / or base station 105-b may identify the decoding candidates (e.g., a set or pair of decoding candidates) to be linked for control channel iterations based on one or more parameters associated with each decoding candidate and / or search space set, including the CIF value of the decoding candidate, candidate index, aggregation level, etc. More specifically, UE115-b and / or base station 105-b may determine whether a set / pair of decoding candidates is linked or unlinked for cross-carrier scheduling and / or intra-carrier scheduling.

[0231] For example, UE115-b may determine that pairs of decoding candidates are linked for control channel iterations based on the fact that pairs of decoding candidates in the first and second search space sets of the scheduling component carrier (e.g., pairs containing the first and second decoding candidates in the first and second search space sets, respectively) correspond to the same CIF value (e.g., scheduling the same component carrier), the same candidate index, the same aggregation level, or any combination thereof. Conversely, UE115-b may determine that pairs of decoding candidates in the first and second search space sets of the scheduling component carrier are not linked for control channel iterations based on the fact that pairs of decoding candidates in the first and second search space sets of the scheduling component carrier correspond to different CIF values ​​(e.g., scheduling different component carriers), different candidate indices, different aggregation levels, or any combination thereof.

[0232] In some embodiments, sets / pairs of decryption candidates in the first and second search space sets of a scheduling component carrier may be linked for both intra-carrier scheduling and cross-carrier scheduling. In other embodiments, sets / pairs of decryption candidates in the first and second search space sets of a scheduling component carrier may be linked for intra-carrier scheduling but not for cross-carrier scheduling (e.g., not linked for cross-carrier scheduling). Conversely, in other embodiments, sets / pairs of decryption candidates in the first and second search space sets of a scheduling component carrier may be linked for both cross-carrier scheduling but not for intra-carrier scheduling (e.g., not linked for intra-carrier scheduling).

[0233] At 835, UE115-b may receive control signaling from base station 105-b indicating an active BWP. More specifically, UE115-b may receive control signaling indicating an active BWP in each of the scheduling component carriers and scheduled component carriers. The control signaling used to indicate an active BWP may include DCI messages, MAC-CE messages, or both. UE115-b may receive control signaling indicating an active BWP at 835 based on receiving control signaling at 805, 810, and / or 815, identifying a search space set linking configuration at 820, identifying a decoded candidate configured for cross-carrier scheduling at 825, identifying linked / unlinked decoded candidates at 830, or any combination thereof. Additionally or alternatively, control signaling received at 805, 810, and / or 815 may indicate an active BWP in the scheduling component carrier and scheduled component carrier.

[0234] As previously stated herein, the scheduling configuration may represent BWPs associated with search space sets in the scheduling component carrier and the scheduled component carrier. Furthermore, UE115-b and / or base station 105-b may be configured to schedule communications on the search space set of the scheduled component carrier via control channel iterations on the search space set of the scheduling component carrier only if the BWPs associated with search space sets in both the scheduling component carrier and the scheduled component carrier are active. In other words, in some implementations, cross-carrier scheduling via control channel iterations may only be performed if the BWPs for linked search space sets are active in both the scheduling component carrier and the scheduled component carrier.

[0235] For example, the scheduling configuration may show a first and second search space set of the scheduling component carrier configured for cross-carrier scheduling. In addition, the search space set linking configuration may show that a third and fourth search space set of the scheduled component carrier are linked for control channel iterations (for example, they can be scheduled via PDCCH iterations through the first and second search space sets). In this example, the control signaling in 835 may show that the first BWP associated with the first and second search space sets of the scheduling component carrier is active, as well as the second BWP associated with the third and fourth search space sets of the scheduled component carrier is active. In this example, based on the fact that both the first and second BWPs are active on the scheduling component carrier and the scheduled component carrier, cross-carrier scheduling of the scheduled component carrier can be performed on the scheduling component carrier via PDCCH iterations.

[0236] In 840, UE115-b may monitor decryption candidates in the search space set of the scheduling component carrier. More specifically, UE115-b may monitor decryption candidates in the search space set of the scheduling component carrier for one or more iterations of control messages that schedule communication on the scheduled component carrier, based on the scheduling configuration and / or the search space set linking configuration. In this regard, UE115-b may monitor decryption candidates based on (for example, accordingly to) the scheduling configuration, the search space set linking configuration, or both.

[0237] Therefore, UE115-b may monitor for decoding candidates in the scheduling component carrier at 840 based on receiving control signaling at 805, 810, and / or 815, identifying a search space set linking configuration at 820, identifying decoding candidates configured for cross-carrier scheduling at 825, identifying linked / unlinked decoding candidates at 830, receiving control signaling at 835, or any combination thereof.

[0238] As an addition or alternative, UE115-b may monitor the search space sets of the scheduling component carrier based on whether the decoding candidate is linked (or unlinked) for cross-carrier and / or intra-carrier scheduling, and based on whether the search space sets of the scheduling component carrier and the scheduled component carrier are linked or unlinked for control channel iterations, and based on whether the BWPs of the respective search space sets are active within both the scheduling component carrier and the scheduled component carrier, or any combination thereof.

[0239] For example, first and second search space sets within a scheduling component carrier, linked for control channel iterations, may each contain first and second decoding candidates, linked for cross-carrier scheduling and control message iterations, respectively. In this example, UE115-b may monitor first and second decoding candidates for one or more iterations of a control message that schedules communication on the scheduled component carrier (e.g., one or more iterations of the same control message). As another example, first and second search space sets within a scheduling component carrier, which may not be linked for control channel iterations, may each contain first and second decoding candidates. In this example, UE115-b may monitor a first decoding candidate for a first control message and a second decoding candidate for a second control message, different from the first decoding candidate, based on the fact that the first and second search space sets are not linked for control channel iterations.

[0240] In 845, UE115-b may receive a first control message (e.g., a first iteration of the control message) from base station 105-b. In some embodiments, the control message may schedule communication between UE115-b and base station 105-b on a scheduled component carrier. The communication scheduled by the control message may include a PDSCH transmission, a PUSCH transmission, or both. Thus, the control message may indicate an SPS release and / or configured grant release on the scheduled component carrier (e.g., an uplink type 2 configured grant). The control message may include DCI messages (e.g., DCI formats 0_1, 0_2, 1_1, and / or 1_2).

[0241] In some embodiments, UE115-b may receive a first control message (e.g., a first iteration of the control message) within a decoded candidate of a search space set associated with a scheduling component carrier. Furthermore, UE115-b may receive a first iteration of the control message within a first decoded candidate of a first search space set, which is either linked to the first search space set for a control channel iteration or linked to a second decoded candidate of a second search space set that is not linked. In this regard, UE115-b may receive a first iteration of the control message based on (e.g., in accordance with) the scheduling configuration and / or the search space set linking configuration. Therefore, UE115-b may receive a first iteration of the control message at 845 based on receiving control signaling at 805, 810, and / or 815, identifying a search space set linking configuration at 820, identifying a decoded candidate for cross-carrier scheduling at 825, identifying a linked or unlinked decoded candidate at 830, receiving control signaling at 835, monitoring a decoded candidate at 840, or any combination thereof.

[0242] In 850, UE115-b may receive a second control message (e.g., a second iteration of the control message) from base station 105-b. In some embodiments, the second control message may schedule communication between UE115-b and base station 105-b on the first component carrier (e.g., a scheduled component carrier) (e.g., PDSCH / SPS release, PDSCH / configured grant release). The control message may include DCI messages (e.g., DCI formats 0_1, 0_2, 1_1, and / or 1_2).

[0243] Depending on whether the search space set and decoded candidates of the scheduling component carrier are linked for control channel iterations, the control messages received at 845 and 850 may contain the same or different payloads. For example, if the search space set of the scheduling component carrier is linked for control channel iterations, a second iteration of the control message received at 850 may contain the same data payload and schedule the same communication as a first iteration of the control message received at 845. As another example, if the search space set of the scheduling component carrier is not linked for control channel iterations, a second iteration of the control message received at 850 may contain a different data payload and schedule a different communication as a first iteration of the control message received at 845.

[0244] In some embodiments, UE115-b may receive a second control message (e.g., a second iteration of the control message) within a decoded candidate of a search space set associated with a scheduling component carrier. Furthermore, UE115-b may receive a second iteration of the control message within a second decoded candidate of a second search space set, which is linked to a first decoded candidate of the first search space set, or is not linked to the first search space set, for control channel iterations. In this regard, UE115-b may receive a second iteration of the control message based on (e.g., in accordance with) the scheduling configuration and / or search space set linking configuration. Therefore, UE115-b may receive a second iteration of the control message at 850 based on receiving control signaling at 805, 810, and / or 815, identifying a search space set linking configuration at 820, identifying a decoding candidate for cross-carrier scheduling at 825, identifying a linked or unlinked decoding candidate at 830, receiving control signaling at 835, monitoring a decoding candidate at 840, receiving a first control message at 845, or any combination thereof.

[0245] In some cases, UE115-b may receive both the first iteration of the control message at 845 and the second iteration of the control message at 850, respectively. In other cases, UE115-b may receive only one of the first or second iterations of the control message. If UE115-b receives only the first or second iteration of the control message, UE115-b may demodulate / decode a single received iteration of the control message. In other cases where UE115-b receives both the first and second iterations of the control message, UE115-b may demodulate / decode only one of the first or second iterations of the control message. As an addition or alternative, UE115-b may combine the first and second iterations of the control message as described in 855 of process flow 800.

[0246] At 855, UE115-b may perform soft synthesis of the first and second repetitions of the control message received at 845 and 850. In some embodiments, UE115-b may perform soft synthesis (e.g., perform one or more soft synthesis steps) to demodulate / decode the repetitions of the control message. In particular, UE115-b may perform soft synthesis of the first signal received at 845 (e.g., the first repetition of the control message) with a second signal received at 850 (e.g., the second repetition of the control message).

[0247] In 860, UE115-b may perform (e.g., transmit, receive) communications scheduled by one or more control messages on the scheduled component carrier. For example, if the scheduled communications include a PUSCH transmit, UE115-b may transmit the scheduled PUSCH transmit to base station 105-b in 860 on the scheduled component carrier. As another example, if the scheduled communications include a PDSCH transmit, UE115-b may receive the scheduled PDSCH transmit from base station 105-b in 860 on the scheduled component carrier.

[0248] UE115-b and base station 105-b may perform scheduled communications in 860 based on receiving control signaling in 805, 810, and / or 815, identifying search space set linking configurations in 820, identifying decoded candidates for cross-carrier scheduling in 825, identifying linked or unlinked decoded candidates in 830, receiving control signaling in 835, monitoring decoded candidates in 840, receiving control messages in 845 and / or 850, performing soft synthesis in 855, or any combination thereof.

[0249] The techniques described herein may provide improved cross-carrier scheduling. More specifically, the techniques described herein may enable the use of PDCCH iterations in the context of cross-carrier scheduling, thereby enabling a set of search spaces on a scheduled component carrier to be scheduled via signaling transmitted / received on a linked set of search spaces on a scheduling component carrier. By enabling PDCCH iterations in the context of cross-carrier scheduling, the techniques described herein may improve the transmission diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0250] Figure 9 shows a block diagram 900 of a device 905 supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. Device 905 may be an example of an aspect of UE 115 as described herein. Device 905 may include a receiver 910, a transmitter 915, and a communications manager 920. Device 905 may also include a processor. Each of these components may be communicating with one another (for example, via one or more buses).

[0251] The receiver 910 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for control channel iteration for cross-carrier scheduling). The information may be passed to other components of device 905. The receiver 910 may utilize a single antenna or a set of multiple antennas.

[0252] Transmitter 915 may provide means for transmitting signals generated by other components of device 905. For example, transmitter 915 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to techniques for control channel iteration for cross-carrier scheduling), user data, control information, or any combination thereof. In some examples, transmitter 915 may be collated with receiver 910 in a transceiver module. Transmitter 915 may utilize a single antenna or a set of multiple antennas.

[0253] The communication manager 920, receiver 910, transmitter 915, or various combinations thereof or various components thereof may be examples of means for performing various aspects of techniques for control channel iteration for cross-carrier scheduling as described herein. For example, the communication manager 920, receiver 910, transmitter 915, or various combinations thereof or components thereof may support methods for performing one or more of the functions described herein.

[0254] In some examples, the communications manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in hardware (for example, in a communications management circuit). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gates or transistor logic, discrete hardware components, or any combination thereof that constitutes, or optionally supports, a means for performing the functions described herein. In some examples, a processor and memory coupled to the processor may be configured to perform one or more of the functions described herein (for example, by the processor executing instructions stored in the memory).

[0255] As an addition or alternative, in some examples, the communications manager 920, receiver 910, transmitter 915, or various combinations or components thereof may be implemented in code executed by a processor (for example, as communications management software or firmware). When implemented in code executed by a processor, the functions of the communications manager 920, receiver 910, transmitter 915, or various combinations or components thereof may be performed by a general-purpose processor, DSP, central processing unit (CPU), ASIC, FPGA, or any combination of these or other programmable logic devices (for example, configured as a means for performing the functions described in this disclosure, or optionally supporting them).

[0256] In some examples, the communications manager 920 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using, or possibly in cooperation with, the receiver 910, the transmitter 915, or both. For example, the communications manager 920 may receive information from the receiver 910 and send information to the transmitter 915, or be integrated with the receiver 910, the transmitter 915, or both to receive information, transmit information, or perform various other operations as described herein.

[0257] The communications manager 920 may support wireless communications in the UE in accordance with the examples disclosed herein. For example, the communications manager 920 may be configured, or may optionally support, means for receiving control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The communications manager 920 may be configured, or may optionally support, means for identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration. The communications manager 920 may be configured, or may optionally support, means for identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier to be allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration. The communication manager 920 may be configured, or may optionally support, means for receiving, from the base station, via a scheduling component carrier, at least one control message from the base station, and within at least one decoding candidate from a set of decoding candidates, for scheduling communication between the base station and the UE via a scheduled component carrier. The communication manager 920 may be configured, or may optionally support, means for transmitting or receiving communication with the base station via a scheduled component carrier based on at least one control message.

[0258] By including or configuring a communications manager 920 in accordance with the examples described herein, device 905 (e.g., a processor controlling, or possibly coupled to, a receiver 910, a transmitter 915, a communications manager 920, or a combination thereof) may support techniques for improved cross-carrier scheduling. More specifically, the techniques described herein may enable the use of PDCCH iterations in the context of cross-carrier scheduling, thereby enabling a set of search spaces on a scheduled component carrier to be scheduled via signaling transmitted / received on a linked set of search spaces on a scheduling component carrier. By enabling PDCCH iterations in the context of cross-carrier scheduling, the techniques described herein may improve the transmission diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0259] Figure 10 shows a block diagram 1000 of device 1005 supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. Device 1005 may be an example of an aspect of device 905 or UE 115 as described herein. Device 1005 may include a receiver 1010, a transmitter 1015, and a communications manager 1020. Device 1005 may also include a processor. Each of these components may be communicating with one another (for example, via one or more buses).

[0260] Receiver 1010 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for control channel iteration for cross-carrier scheduling). The information may be passed to other components of device 1005. Receiver 1010 may utilize a single antenna or a set of multiple antennas.

[0261] The transmitter 1015 may provide means for transmitting signals generated by other components of device 1005. For example, the transmitter 1015 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to techniques for control channel iteration for cross-carrier scheduling), user data, control information, or any combination thereof. In some examples, the transmitter 1015 may be collated with the receiver 1010 in a transceiver module. The transmitter 1015 may utilize a single antenna or a set of multiple antennas.

[0262] Device 1005 or its various components may be examples of means for performing various aspects of techniques for control channel iteration for cross-carrier scheduling, as described herein. For example, communication manager 1020 may include scheduling configuration manager 1025, search space set linking configuration manager 1030, decoding candidate manager 1035, control message 1040, base station communication manager 1045, or any combination thereof. Communication manager 1020 may be an example of an aspect of communication manager 920 as described herein. In some examples, communication manager 1020 or its various components may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using, or possibly in cooperation with, receiver 1010, transmitter 1015, or both. For example, communication manager 1020 may receive information from receiver 1010 and send information to transmitter 1015, or be integrated with receiver 1010, transmitter 1015, or both, to receive information, transmit information, or perform various other operations as described herein.

[0263] The communications manager 1020 may support wireless communications in the UE in accordance with the examples disclosed herein. The scheduling configuration manager 1025 may be configured, or may optionally support, means for receiving control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The search space set linking configuration manager 1030 may be configured, or may optionally support, means for identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration. The decoded candidate manager 1035 may be configured, or may optionally support, means for identifying a set of decoded candidates in the first search space set and the second search space set of the scheduling component carrier to be allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration. The control message 1040 may be configured, or may optionally support, for receiving at least one control message via a scheduling component carrier from the base station, and within at least one decoding candidate from a set of decoding candidates, for scheduling communication between the base station and the UE via a scheduled component carrier. The base station communication manager 1045 may be configured, or may optionally support, for transmitting or receiving communication with the base station via a scheduled component carrier based on at least one control message.

[0264] Figure 11 shows a block diagram 1100 of a communications manager 1120 supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. Communications manager 1120 may be an example of an aspect of communications manager 920, communications manager 1020, or both, as described herein. Communications manager 1120 or its various components may be an example of means for performing various aspects of the technique for control channel iteration for cross-carrier scheduling, as described herein. For example, communications manager 1120 may include a scheduling configuration manager 1125, a search space set linking configuration manager 1130, a decoded candidate manager 1135, a control message manager 1140, a base station communications manager 1145, a control signaling receive manager 1150, a monitoring manager 1155, or any combination thereof. Each of these components may communicate with one another directly or indirectly (for example, via one or more buses).

[0265] The communications manager 1120 may support wireless communications in the UE in accordance with the examples disclosed herein. The scheduling configuration manager 1125 may be configured, or may optionally support, means for receiving control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The search space set linking configuration manager 1130 may be configured, or may optionally support, means for identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration. The decoded candidate manager 1135 may be configured, or may optionally support, means for identifying a set of decoded candidates in the first search space set and the second search space set of the scheduling component carrier to be allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration. The control message 1140 may be configured, or may optionally support, for receiving at least one control message via a scheduling component carrier from the base station, and within at least one decoding candidate from a set of decoding candidates, for scheduling communication between the base station and the UE via a scheduled component carrier. The base station communication manager 1145 may be configured, or may optionally support, for transmitting or receiving communication with the base station via a scheduled component carrier based on at least one control message.

[0266] In some examples, to support identifying search space set linking configurations, the search space set linking configuration manager 1130 may be configured, or may support, means for receiving additional control signaling from a base station indicating a search space set linking configuration. In some examples, to support identifying search space set linking configurations, the search space set linking configuration manager 1130 may be configured, or may support, means for identifying that at least two of a set of multiple search space sets of a scheduled component carrier are linked for control channel iterations, based on a scheduling configuration indicating that a first search space set and a second search space set of the scheduling component carrier are linked for control channel iterations.

[0267] In some examples, 1160 may be configured, or may support, means for monitoring a first decoding candidate in a first search space set for control message iterations, and a second decoding candidate in a second search space set linked to the first decoding candidate for control message iterations, based on the assumption that at least two search space sets are linked for control channel iterations.

[0268] In some examples, to support identifying search space set linking configurations, the search space set linking configuration manager 1130 may be configured, or may support, identifying that at least two search space sets are linked for control channel iterations, based on the fact that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are associated with first and second search space set indices which are the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively.

[0269] In some examples, to support identifying search space set linking configurations, the search space set linking configuration manager 1130 may be configured, or may support, identifying that at least two search space sets are linked for control channel iterations, based on the fact that at least two of the multiple sets of search space sets of a scheduled component carrier consist of the same amount of decoded candidates per aggregation level.

[0270] In some examples, at least one decoding candidate of a set of decoding candidates includes a pair of decoding candidates, and the decoding candidate manager 1135 can be configured as, or optionally support, means for identifying that the pair of decoding candidates are linked for control channel repetition based on the pair of decoding candidates corresponding to the same CIF, the same candidate index, and the same aggregation level. In some examples, the decoding candidate manager 1135 can be configured as, or optionally support, means for identifying that a third set of monitoring occasions within a first search space set of a scheduling component carrier, and a fourth set of monitoring occasions within a second search space set of the scheduling component carrier, are not linked for control channel repetition for in-carrier scheduling.

[0271] In some examples, to support identifying a search space set linking configuration, the search space set linking configuration manager 1130 can be configured as, or optionally support, means for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are not linked for control channel repetition.

[0272] In some examples, based on identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are not linked for control channel repetition, the monitoring manager 1155 can be configured as, or optionally support, means for monitoring a first decoding candidate of a first search space set for a first control message and a second decoding candidate of a second search space set for a second control message different from the first control message.

[0273] In some examples, the decoding candidate manager 1135 may be configured, or may support, means for identifying, based on the search space set linking configuration, that a first decoding candidate in a first search space set is not linked to a second decoding candidate in a second search space set for control channel iterations for cross-carrier scheduling on a scheduled component carrier. In some examples, the decoding candidate manager 1135 may be configured, or may support, means for identifying, based on the search space set linking configuration, that a third decoding candidate in a first search space set is linked to a fourth decoding candidate in a second search space set for control channel iterations for in-carrier scheduling on a scheduling component carrier.

[0274] In some examples, the scheduling configuration manager 1125 may be configured, or may optionally support, means for receiving control signaling indicating a first set of one or more monitoring occasions for a first set of search space sets and a second set of one or more monitoring occasions for a second set of search space sets. In some examples, to support receiving control signaling that identifies a scheduling configuration, the scheduling configuration manager 1125 may be configured, or may optionally support, means for receiving control signaling indicating a first search space set index associated with a first set of search space sets of the scheduling component carrier and a second search space set index associated with a second set of search space sets of the scheduling component carrier.

[0275] In some examples, a third search space set and a fourth search space set of a set of multiple search space sets of a scheduled component carrier are each associated with a first search space set index and a second search space set index. In some examples, a search space set linking configuration indicates whether a third search space set and a fourth search space set are linked or not linked for control channel repetition based on the first search space set and the second search space set being linked for control channel repetition.

[0276] In some examples, to support receiving control signaling that identifies a scheduling configuration, the scheduling configuration manager 1125 may be configured as, or may optionally support, means for receiving control signaling indicating that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are configured within a first BWP of the scheduled component carrier, and that a first search space set and a second search space set of the scheduling component carrier are configured within a second BWP of the scheduling component carrier.

[0277] In some examples, the control signaling receive manager 1150 may be configured, or may optionally support, means for receiving additional control signaling indicating that a first BWP associated with a first search space set and a second search space set of a scheduling component carrier is active, and that a second BWP associated with a set of multiple search space sets of a scheduled component carrier is active. In some examples, the monitoring manager 1155 may be configured, or may optionally support, means for monitoring a first decryption candidate for the first search space set and a second decryption candidate for the second search space set for one or more iterations of a control message, based on the activity of the first and second BWPs.

[0278] In some examples, the monitoring manager 1155 monitors a first decoded candidate in the first search space set for a second control message and a second decoded candidate in the second search space set for the repetition of the second control message, based on the first search space set being linked to a second search space set for control channel iterations for in-carrier scheduling on a scheduling component carrier, wherein the second control message may be configured, or may optionally support, a means of scheduling a second communication between the UE and the base station via the scheduling component carrier.

[0279] In some examples, the first decryption candidate in the first search space set and the second decryption candidate in the second search space set are associated with a first CIF value corresponding to the scheduling component carrier. In some examples, the third decryption candidate in the first search space set and the fourth decryption candidate in the second search space set are associated with a second CIF value, different from the first CIF value, corresponding to the scheduled component carrier.

[0280] In some examples, the control signaling receive manager 1150 may be configured, or may optionally support, for receiving additional control signaling from a base station indicating a set of multiple component carriers, including a scheduled component carrier, configured for cross-carrier scheduling via control channel iterations. In some examples, the decoding candidate manager 1135 may be configured, or may optionally support, for identifying, based on the indication of a set of multiple component carriers, that a first decoding candidate in a first search space set is linked to a second decoding candidate in a second search space set for control channel iterations, for cross-carrier scheduling on the scheduled component carrier.

[0281] In some examples, the control signaling receive manager 1150 may be configured, or may optionally support, means for receiving additional control signaling from a base station indicating a set of multiple component carriers, including a scheduled component carrier, configured for cross-carrier scheduling via control channel iterations on a scheduling component carrier. In some examples, the decoding candidate manager 1135 may be configured, or may optionally support, means for identifying, based on the indication of a set of multiple component carriers, that a first decoding candidate in a first search space set is linked to a second decoding candidate in a second search space set for control channel iterations, for cross-carrier scheduling on a scheduled component carrier.

[0282] In some examples, a set of multiple search space sets in a scheduled component carrier includes a third and a fourth search space set. In some examples, the first search space set of a scheduling component carrier and the third search space set of a scheduled component carrier are associated with the first search space set index. In some examples, the second search space set of a scheduling component carrier and the fourth search space set of a scheduled component carrier are associated with a second search space set index different from the first search space set index.

[0283] Figure 12 shows a diagram of a system 1200 including a device 1205 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. Device 1205 may be an example of, or include, a component of, device 905, device 1005, or UE 115 as described herein. Device 1205 may wirelessly communicate with one or more base stations 105, UE 115, or any combination thereof. Device 1205 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, such as a communications manager 1220, an input / output (I / O) controller 1210, a transceiver 1215, an antenna 1225, a memory 1230, a code 1235, and a processor 1240. These components may communicate electronically via one or more buses (e.g., bus 1245) or may be coupled in some cases (e.g., operably, communicatively, functionally, electronically, electrically).

[0284] The I / O controller 1210 may manage input and output signals for device 1205. The I / O controller 1210 may also manage peripherals not integrated into device 1205. In some cases, the I / O controller 1210 may represent physical connections or ports to external peripherals. In some cases, the I / O controller 1210 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX®, or another known operating system. Additionally or alternatively, the I / O controller 1210 may represent, or interact with, a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 1210 may be implemented as part of a processor, such as processor 1240. In some cases, the user may interact with device 1205 via I / O controller 1210 or via hardware components controlled by I / O controller 1210.

[0285] In some cases, device 1205 may include a single antenna 1225. However, in some other cases, device 1205 may have two or more antennas 1225 that may be capable of simultaneously transmitting or receiving multiple wireless transmissions. Transceiver 1215 may communicate bidirectionally via one or more antennas 1225, a wired link, or a wireless link, as described herein. For example, transceiver 1215 may represent a wireless transceiver and communicate bidirectionally with another wireless transceiver. Transceiver 1215 may also include a modem for modulating packets, providing the modulated packets to one or more antennas 1225 for transmission, and demodulating packets received from one or more antennas 1225. Transceiver 1215, or transceiver 1215 and one or more antennas 1225, may be an example of a transmitter 915, a transmitter 1015, a receiver 910, a receiver 1010, or any combination thereof or components thereof, as described herein.

[0286] Memory 1230 may include random access memory (RAM) and read-only memory (ROM). Memory 1230 may store computer-readable, computer-executable code 1235, which, when executed by processor 1240, includes instructions that cause device 1205 to perform various functions described herein. Code 1235 may be stored in a non-temporary computer-readable medium such as system memory or another type of memory. In some cases, code 1235 may not be directly executable by processor 1240, but (for example, when compiled and executed) may cause the computer to perform the functions described herein. In some cases, memory 1230 may include a basic I / O system (BIOS) that can control basic hardware or software operations, in particular, interactions with peripheral components or peripheral devices.

[0287] The processor 1240 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1240 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 1240. The processor 1240 may be configured to execute computer-readable instructions stored in memory (e.g., memory 1230) to cause device 1205 to perform various functions (e.g., functions or tasks supporting techniques for control channel iterations for cross-carrier scheduling). For example, device 1205 or components of device 1205 may include the processor 1240 and memory 1230 coupled to the processor 1240, and the processor 1240 and memory 1230 may be configured to perform various functions described herein.

[0288] The communications manager 1220 may support wireless communications in the UE in accordance with the examples disclosed herein. For example, the communications manager 1220 may be configured, or may optionally support, means for receiving control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The communications manager 1220 may be configured, or may optionally support, means for identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration. The communications manager 1220 may be configured, or may optionally support, means for identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier to be allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration. The communication manager 1220 may be configured, or may optionally support, means for receiving, from the base station, via a scheduling component carrier, at least one control message from the base station, and within at least one decoding candidate from a set of decoding candidates, for scheduling communication between the base station and the UE via a scheduled component carrier. The communication manager 1220 may be configured, or may optionally support, means for transmitting or receiving communication with the base station via a scheduled component carrier based on at least one control message.

[0289] By including or configuring a communications manager 1220 according to the examples described herein, device 1205 may support techniques for improved cross-carrier scheduling. More specifically, the techniques described herein may enable the use of PDCCH iterations in the context of cross-carrier scheduling, thereby enabling a search space set on a scheduled component carrier to be scheduled via signaling transmitted / received on a linked search space set of a scheduling component carrier. By enabling PDCCH iterations in the context of cross-carrier scheduling, the techniques described herein may improve the transmission diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0290] In some examples, the communications manager 1220 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using, or possibly in cooperation with, the transceiver 1215, one or more antennas 1225, or any combination thereof. Although the communications manager 1220 is shown as a separate component, in some examples, one or more functions described with reference to the communications manager 1220 may be supported or performed by the processor 1240, memory 1230, code 1235, or any combination thereof. For example, code 1235 may include instructions executable by the processor 1240 to cause the device 1205 to perform various aspects of techniques for control channel iteration for cross-carrier scheduling as described herein, or the processor 1240 and memory 1230 may, in some cases, be configured to perform or support such operations.

[0291] Figure 13 shows a block diagram 1300 of a device 1305 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. Device 1305 may be an example of an embodiment of a base station 105 as described herein. Device 1305 may include a receiver 1310, a transmitter 1315, and a communications manager 1320. Device 1305 may also include a processor. Each of these components may be communicating with one another (for example, via one or more buses).

[0292] Receiver 1310 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for control channel iteration for cross-carrier scheduling). The information may be passed to other components of device 1305. Receiver 1310 may utilize a single antenna or a set of multiple antennas.

[0293] Transmitter 1315 may provide means for transmitting signals generated by other components of device 1305. For example, transmitter 1315 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to techniques for control channel iteration for cross-carrier scheduling), user data, control information, or any combination thereof. In some examples, transmitter 1315 may be collated with receiver 1310 in a transceiver module. Transmitter 1315 may utilize a single antenna or a set of multiple antennas.

[0294] The communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations or various components thereof can be examples of means for performing various aspects of techniques for control channel repetition for cross-carrier scheduling as described herein. For example, the communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof can support a method for performing one or more of the functions described herein.

[0295] In some examples, the communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof can be implemented within hardware (e.g., within a communication management circuit). The hardware can include a processor, a DSP, an ASIC, an FPGA, or other programmable logic device, discrete gates or transistor logic, discrete hardware components, or any combination thereof configured as or optionally supporting means for performing the functions described in this disclosure. In some examples, a processor, and memory coupled to the processor, can be configured to perform one or more of the functions described herein (e.g., by the processor executing instructions stored in the memory).

[0296] Additionally or alternatively, in some examples, the communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof can be implemented within code executed by a processor (e.g., as communication management software or firmware). When implemented with code executed by a processor, the functions of the communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof can be executed by any combination of a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or these or other programmable logic devices (e.g., configured as or optionally supporting means for performing the functions described in this disclosure).

[0297] In some examples, the communications manager 1320 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using, or possibly in cooperation with, the receiver 1310, the transmitter 1315, or both. For example, the communications manager 1320 may receive information from the receiver 1310 and send information to the transmitter 1315, or be integrated with the receiver 1310, the transmitter 1315, or both to receive information, transmit information, or perform various other operations as described herein.

[0298] The communication manager 1320 may support wireless communications at a base station in accordance with the examples disclosed herein. For example, the communication manager 1320 may be configured, or may optionally support, means for transmitting a control signaling to a UE that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The communication manager 1320 may be configured, or may optionally support, means for identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration. The communication manager 1320 may be configured, or may optionally support, means for identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration. The communication manager 1320 may be configured, or may optionally support, means for sending to the UE, via a scheduling component carrier, at least one control message, via a scheduling component carrier, that schedules communication between the base station and the UE via a scheduling component carrier, and within at least one decoding candidate from a set of decoding candidates. The communication manager 1320 may be configured, or may optionally support, means for sending or receiving communication with the UE via a scheduling component carrier based on at least one control message.

[0299] By including or configuring a communications manager 1320 according to the examples described herein, device 1305 (e.g., a processor controlling or optionally coupled to a receiver 1310, transmitter 1315, communications manager 1320, or a combination thereof) may support improved cross-carrier scheduling techniques. More specifically, the techniques described herein may enable the use of PDCCH iterations in the context of cross-carrier scheduling, thereby enabling a set of search spaces on a scheduled component carrier to be scheduled via signaling transmitted / received on a linked set of search spaces on a scheduling component carrier. By enabling PDCCH iterations in the context of cross-carrier scheduling, the techniques described herein may improve the transmission diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0300] Figure 14 shows a block diagram 1400 of a device 1405 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. Device 1405 may be an example of an aspect of device 1305 or base station 105 as described herein. Device 1405 may include a receiver 1410, a transmitter 1415, and a communications manager 1420. Device 1405 may also include a processor. Each of these components may be communicating with one another (for example, via one or more buses).

[0301] Receiver 1410 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for control channel iteration for cross-carrier scheduling). The information may be passed to other components of device 1405. Receiver 1410 may utilize a single antenna or a set of multiple antennas.

[0302] Transmitter 1415 may provide means for transmitting signals generated by other components of device 1405. For example, transmitter 1415 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to techniques for control channel iteration for cross-carrier scheduling), user data, control information, or any combination thereof. In some examples, transmitter 1415 may be collated with receiver 1410 in a transceiver module. Transmitter 1415 may utilize a single antenna or a set of multiple antennas.

[0303] Device 1405 or its various components may be examples of means for performing various aspects of techniques for control channel iteration for cross-carrier scheduling, as described herein. For example, the communications manager 1420 may include a scheduling configuration manager 1425, a search space set linking configuration manager 1430, a decoded candidate manager 1435, a control message send manager 1440, a UE communications manager 1445, or any combination thereof. The communications manager 1420 may be an example of an aspect of communications manager 1320 as described herein. In some examples, the communications manager 1420 or its various components may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using, or possibly in cooperation with, the receiver 1410, the transmitter 1415, or both. For example, the communications manager 1420 may receive information from the receiver 1410 and send information to the transmitter 1415, or be integrated with the receiver 1410, the transmitter 1415, or both, to receive information, transmit information, or perform various other operations as described herein.

[0304] The communications manager 1420 may support wireless communications at a base station in accordance with the examples disclosed herein. The scheduling configuration manager 1425 may be configured, or may optionally support, for transmitting a control signaling to the UE that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The search space set linking configuration manager 1430 may be configured, or may optionally support, for identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration. The decoded candidate manager 1435 may be configured, or may optionally support, for identifying a set of decoded candidates in the first search space set and the second search space set of the scheduling component carrier to be allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration. The control message transmission manager 1440 may be configured, or may optionally support, means for sending at least one control message to the UE via a scheduling component carrier, which schedules communication between the base station and the UE via a scheduled component carrier, and within at least one decoding candidate from a set of decoding candidates. The UE communication manager 1445 may be configured, or may optionally support, means for sending or receiving communication with the UE via a scheduled component carrier based on at least one control message.

[0305] Figure 15 shows a block diagram 1500 of a communications manager 1520 supporting a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. Communications manager 1520 may be an example of an aspect of communications manager 1320, communications manager 1420, or both, as described herein. Communications manager 1520 or its various components may be an example of means for performing various aspects of the technique for control channel iteration for cross-carrier scheduling, as described herein. For example, communications manager 1520 may include a scheduling configuration manager 1525, a search space set linking configuration manager 1530, a decoded candidate manager 1535, a control message sender manager 1540, a UE communications manager 1545, a control signaling sender manager 1550, or any combination thereof. Each of these components may communicate with each other directly or indirectly (for example, via one or more buses).

[0306] The communications manager 1520 may support wireless communications at a base station in accordance with the examples disclosed herein. The scheduling configuration manager 1525 may be configured, or may optionally support, means for transmitting a control signaling to a UE that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The search space set linking configuration manager 1530 may be configured, or may optionally support, means for identifying a search space set linking configuration for a set of multiple search space sets of a scheduled component carrier based on the scheduling configuration. The decoded candidate manager 1535 may be configured, or may optionally support, means for identifying a set of decoded candidates in the first search space set and the second search space set of a scheduling component carrier to be allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration. The control message transmission manager 1540 may be configured, or may optionally support, means for sending at least one control message to the UE via a scheduling component carrier, which schedules communication between the base station and the UE via a scheduled component carrier, and within at least one decoding candidate from a set of decoding candidates. The UE communication manager 1545 may be configured, or may optionally support, means for sending or receiving communication with the UE via a scheduled component carrier based on at least one control message.

[0307] In some examples, to support the identification of search space set linking configurations, the search space set linking configuration manager 1530 may be configured, or may support, for sending additional control signaling to the UE indicating a search space set linking configuration. In some examples, to support the identification of search space set linking configurations, the search space set linking configuration manager 1530 may be configured, or may support, for identifying that at least two of a set of multiple search space sets of a scheduled component carrier are linked for control channel iterations, based on a scheduling configuration indicating that a first search space set and a second search space set of the scheduling component carrier are linked for control channel iterations.

[0308] In some examples, to support identifying search space set linking configurations, the search space set linking configuration manager 1530 may be configured, or may support, identifying that at least two search space sets are linked for control channel iterations, based on the fact that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are associated with first and second search space set indices which are the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively.

[0309] In some examples, to support the identification of search space set linking configurations, the search space set linking configuration manager 1530 may be configured, or may support, the identification of at least two search space sets being linked for control channel iterations, based on the fact that at least two of the set of multiple search space sets of the scheduled component carrier consist of the same amount of decoded candidates per aggregation level.

[0310] In some examples, to support identifying search space set linking configurations, the search space set linking configuration manager 1530 may be configured, or may support, identifying that at least two of a set of multiple search space sets of a scheduled component carrier are linked for control channel iterations, based on the fact that each pair of decryption candidates across first and second search space sets for two monitoring occasions is linked for control channel iterations, and each pair of decryption candidates linked for control channel iterations corresponds to the same CIF, the same candidate index, and the same aggregation level.

[0311] In some examples, the search space set linking configuration manager 1530 may be configured, or may support, means for identifying that a third set of monitoring occasions in a first search space set of the scheduling component carrier, and a fourth set of monitoring occasions in a second search space set of the scheduling component carrier, are not linked for control channel iterations for in-carrier scheduling. In some examples, to support identifying search space set linking configurations, the search space set linking configuration manager 1530 may be configured, or may support, means for identifying that at least two of the multiple sets of search space sets of the scheduled component carrier are not linked for control channel iterations.

[0312] In some examples, the decoding candidate manager 1535 may be configured, or may support, means for identifying, based on the search space set linking configuration, that a first decoding candidate in a first search space set is not linked to a second decoding candidate in a second search space set for control channel iterations for cross-carrier scheduling on a scheduled component carrier.

[0313] In some examples, the decoding candidate manager 1535 may be configured, or may support, means for identifying, based on the search space set linking configuration, that a third decoding candidate in a first search space set is linked to a fourth decoding candidate in a second search space set for control channel iterations, for in-carrier scheduling on the scheduling component carrier.

[0314] In some examples, the scheduling configuration manager 1525 may be configured, or may optionally support, for transmitting control signaling indicating a first set of one or more monitoring occasions for a first set of search space sets and a second set of one or more monitoring occasions for a second set of search space sets. In some examples, to support transmitting control signaling that identifies a scheduling configuration, the scheduling configuration manager 1525 may be configured, or may optionally support, for transmitting control signaling indicating a first search space set index associated with a first set of search space sets of the scheduling component carrier and a second search space set index associated with a second set of search space sets of the scheduling component carrier.

[0315] In some examples, the third and fourth search space sets of a set of multiple search space sets in a scheduled component carrier are associated with the first and second search space set indexes, respectively. In some examples, the search space set linking configuration indicates whether the third and fourth search space sets are linked or not for control channel iterations, based on the fact that the first and second search space sets are linked for control channel iterations.

[0316] In some examples, to support sending control signaling that identifies the scheduling configuration, the scheduling configuration manager 1525 may be configured, or may support, sending control signaling that indicates at least two of a set of multiple search space sets of the scheduled component carrier are configured within a first BWP of the scheduled component carrier, and that the first and second search space sets of the scheduling component carrier are configured within a second BWP of the scheduling component carrier.

[0317] In some examples, the control signaling send manager 1550 may send additional control signaling indicating that a first BWP associated with a first search space set and a second search space set of a scheduling component carrier is active, and that a second BWP associated with a set of multiple search space sets of a scheduled component carrier is active, wherein sending at least one control message may be configured, or may support, as a means to do so based on the fact that the first and second BWPs are active.

[0318] In some examples, the first decryption candidate in the first search space set and the second decryption candidate in the second search space set are associated with a first CIF value corresponding to the scheduling component carrier. In some examples, the third decryption candidate in the first search space set and the fourth decryption candidate in the second search space set are associated with a second CIF value, different from the first CIF value, corresponding to the scheduled component carrier.

[0319] In some examples, the control signaling send manager 1550 may be configured, or may optionally support, for sending additional control signaling to the UE, indicating a set of component carriers, including a scheduled component carrier, configured for cross-carrier scheduling via control channel iterations. In some examples, the decode candidate manager 1535 may be configured, or may optionally support, for identifying, based on the indication of a set of component carriers, that a first decode candidate in a first search space set is linked to a second decode candidate in a second search space set for control channel iterations, for cross-carrier scheduling on the scheduled component carrier.

[0320] In some examples, the control signaling send manager 1550 may be configured, or may optionally support, for sending additional control signaling to the UE, indicating a set of component carriers, including a scheduled component carrier, configured for cross-carrier scheduling via control channel iterations on a scheduling component carrier. In some examples, the decode candidate manager 1535 may be configured, or may optionally support, for identifying, based on the indication of a set of component carriers, that a first decode candidate in a first search space set is linked to a second decode candidate in a second search space set for control channel iterations, for cross-carrier scheduling on a scheduled component carrier.

[0321] In some examples, a set of multiple search space sets in a scheduled component carrier includes a third and a fourth search space set. In some examples, the first search space set of a scheduling component carrier and the third search space set of a scheduled component carrier are associated with the first search space set index. In some examples, the second search space set of a scheduling component carrier and the fourth search space set of a scheduled component carrier are associated with a second search space set index different from the first search space set index.

[0322] Figure 16 shows a diagram of system 1600 including a device 1605 that supports a technique for control channel iteration for cross-carrier scheduling according to an aspect of the present disclosure. Device 1605 may be an example of, or include, a component of, device 1305, device 1405, or base station 105 as described herein. Device 1605 may wirelessly communicate with one or more base stations 105, UE 115, or any combination thereof. Device 1605 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, such as a communications manager 1620, a network communications manager 1610, a transceiver 1615, an antenna 1625, a memory 1630, a code 1635, a processor 1640, and an inter-station communications manager 1645. These components may communicate electronically or optionally (e.g., operably, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1650).

[0323] The network communication manager 1610 may manage communication with the core network 130 (for example, via one or more wired backhaul links). For example, the network communication manager 1610 may manage the transfer of data communications for one or more client devices such as UE 115.

[0324] In some cases, device 1605 may include a single antenna 1625. However, in some other cases, device 1605 may have two or more antennas 1625 that are capable of simultaneously transmitting or receiving multiple wireless transmissions. Transceiver 1615 may communicate bidirectionally via one or more antennas 1625, a wired link, or a wireless link, as described herein. For example, transceiver 1615 may represent a wireless transceiver and communicate bidirectionally with another wireless transceiver. Transceiver 1615 may also include a modem for modulating packets, providing the modulated packets to one or more antennas 1625 for transmission, and demodulating packets received from one or more antennas 1625. Transceiver 1615, or transceiver 1615 and one or more antennas 1625, may be examples of transmitter 1315, transmitter 1415, receiver 1310, receiver 1410, or any combination thereof or components thereof, as described herein.

[0325] Memory 1630 may include RAM and ROM. Memory 1630 may store computer-readable, computer-executable code 1635, which, when executed by processor 1640, includes instructions that cause device 1605 to perform various functions described herein. Code 1635 may be stored in a non-temporary computer-readable medium such as system memory or another type of memory. In some cases, code 1635 may not be directly executable by processor 1640, but (for example, when compiled and executed) may cause the computer to perform the functions described herein. In some cases, memory 1630 may include a BIOS that can control basic hardware or software operations, in particular, interactions with peripheral components or peripheral devices.

[0326] The processor 1640 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1640 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 1640. The processor 1640 may be configured to execute computer-readable instructions stored in memory (e.g., memory 1630) to cause device 1605 to perform various functions (e.g., functions or tasks supporting techniques for control channel iterations for cross-carrier scheduling). For example, device 1605 or components of device 1605 may include the processor 1640 and memory 1630 coupled to the processor 1640, and the processor 1640 and memory 1630 may be configured to perform various functions described herein.

[0327] The inter-station communication manager 1645 can manage communication with other base stations 105 and may include a controller or scheduler to coordinate communication with the UE 115 in cooperation with other base stations 105. For example, the inter-station communication manager 1645 may coordinate scheduling for transmissions to the UE 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communication manager 1645 may provide an X2 interface within the LTE / LTE-A wireless communication network technology for communication between base stations 105.

[0328] The communication manager 1620 may support wireless communications at a base station in accordance with the examples disclosed herein. For example, the communication manager 1620 may be configured, or may optionally support, means for transmitting a control signaling to a UE that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The communication manager 1620 may be configured, or may optionally support, means for identifying a search space set linking configuration for a set of multiple search space sets of the scheduled component carrier based on the scheduling configuration. The communication manager 1620 may be configured, or may optionally support, means for identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration. The communication manager 1620 may be configured, or may optionally support, means for sending to the UE, via a scheduling component carrier, at least one control message, via a scheduling component carrier, that schedules communication between the base station and the UE via a scheduling component carrier, and within at least one decoding candidate from a set of decoding candidates. The communication manager 1620 may be configured, or may optionally support, means for sending or receiving communication with the UE via a scheduling component carrier based on at least one control message.

[0329] By including or configuring a communications manager 1620 according to the examples described herein, device 1605 may support techniques for improved cross-carrier scheduling. More specifically, the techniques described herein may enable the use of PDCCH iterations in the context of cross-carrier scheduling, thereby enabling a search space set on a scheduled component carrier to be scheduled via signaling transmitted / received on a linked search space set of a scheduling component carrier. By enabling PDCCH iterations in the context of cross-carrier scheduling, the techniques described herein may improve the transmission diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0330] In some examples, the communications manager 1620 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using, or possibly in cooperation with, the transceiver 1615, one or more antennas 1625, or any combination thereof. Although the communications manager 1620 is shown as a separate component, in some examples, one or more functions described with reference to the communications manager 1620 may be supported or performed by the processor 1640, memory 1630, code 1635, or any combination thereof. For example, code 1635 may include instructions executable by the processor 1640 to cause the device 1605 to perform various aspects of techniques for control channel iteration for cross-carrier scheduling as described herein, or the processor 1640 and memory 1630 may, in some cases, be configured to perform or support such operations.

[0331] Figure 17 shows a flowchart illustrating method 1700 supporting a technique for control channel iteration for cross-carrier scheduling according to aspects of this disclosure. The operation of method 1700 may be implemented by a UE or its components as described herein. For example, the operation of method 1700 may be performed by UE 115 as described with reference to Figures 1 to 12. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the functions described. Additional or alternative, the UE may perform aspects of the functions described using dedicated hardware.

[0332] In 1705, the method may include receiving control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The operation of 1705 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1705 may be performed by a scheduling configuration manager 1125 as described with reference to Figure 11.

[0333] In 1710, the method may include identifying a search space set linking configuration for a set of multiple search space sets of a scheduled component carrier, based on the scheduling configuration. The operation of 1710 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1710 may be performed by a search space set linking configuration manager 1130, as described with reference to Figure 11.

[0334] In 1715, the method may include identifying sets of decryption candidates in a first search space set and a second search space set of a scheduling component carrier, which are allocated for cross-carrier scheduling of the scheduled component carrier, based on the search space set linking configuration. The operation of 1715 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1715 may be performed by a decryption candidate manager 1135, as described with reference to Figure 11.

[0335] In 1720, the method may include receiving at least one control message via a scheduling component carrier from the base station and within at least one decoding candidate from a set of decoding candidates, for which communication between the base station and the UE is scheduled via a scheduled component carrier. Operation of 1720 may be performed according to examples such as those disclosed herein. In some examples, a mode of operation of 1720 may be performed by a control message 1140, as described with reference to Figure 11.

[0336] In 1725, the method may include transmitting or receiving communications with a base station via a scheduled component carrier based on at least one control message. The operation of 1725 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1725 may be performed by a base station communications manager 1145, as described with reference to Figure 11.

[0337] Figure 18 shows a flowchart illustrating method 1800 supporting a technique for control channel iteration for cross-carrier scheduling according to aspects of this disclosure. The operation of method 1800 may be implemented by a UE or its components as described herein. For example, the operation of method 1800 may be performed by UE 115 as described with reference to Figures 1 to 12. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the functions described. Additional or alternative, the UE may perform aspects of the functions described using dedicated hardware.

[0338] In 1805, the method may include receiving control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The operation of 1805 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1805 may be performed by a scheduling configuration manager 1125 as described with reference to Figure 11.

[0339] In 1810, the method may include identifying a search space set linking configuration for a set of multiple search space sets of a scheduled component carrier based on the scheduling configuration. The operation of 1810 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1810 may be performed by a search space set linking configuration manager 1130, as described with reference to Figure 11.

[0340] In 1815, the method may include identifying sets of decryption candidates in a first search space set and a second search space set of a scheduled component carrier, which are allocated for cross-carrier scheduling of the scheduled component carrier, based on the search space set linking configuration. The operation of 1815 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1815 may be performed by a decryption candidate manager 1135, as described with reference to Figure 11.

[0341] In 1820, the method may include identifying that at least two of a set of multiple search space sets of a scheduled component carrier are linked for control channel iterations, based on a scheduling configuration indicating that a first search space set and a second search space set of the scheduling component carrier are linked for control channel iterations. The operation of 1820 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1820 may be performed by a search space set linking configuration manager 1130, as described with reference to Figure 11.

[0342] In 1825, the method may include receiving at least one control message via a scheduling component carrier from the base station and within at least one of the set of decoding candidates, which schedules communication between the base station and the UE via a scheduled component carrier. Operation of 1825 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1825 may be performed by a control message 1140, as described with reference to Figure 11.

[0343] In 1830, the method may include transmitting or receiving communications with a base station via a scheduled component carrier based on at least one control message. The operation of 1830 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1830 may be performed by a base station communications manager 1145, as described with reference to Figure 11.

[0344] Figure 19 shows a flowchart illustrating method 1900 supporting a technique for control channel iteration for cross-carrier scheduling according to aspects of this disclosure. The operation of method 1900 may be implemented by a UE or its components as described herein. For example, the operation of method 1900 may be performed by UE 115 as described with reference to Figures 1 to 12. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the functions described. Additional or alternative, the UE may perform aspects of the functions described using dedicated hardware.

[0345] In 1905, the method may include receiving control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The operation of 1905 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1905 may be performed by a scheduling configuration manager 1125 as described with reference to Figure 11.

[0346] In 1910, the method may include identifying a search space set linking configuration for a set of multiple search space sets of a scheduled component carrier based on the scheduling configuration. The operation of 1910 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1910 may be performed by a search space set linking configuration manager 1130, as described with reference to Figure 11.

[0347] In 1915, the method may include identifying sets of decryption candidates in a first and second search space set of a scheduling component carrier, which are allocated for cross-carrier scheduling of the scheduled component carrier, based on the search space set linking configuration. The operation of 1915 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1915 may be performed by a decryption candidate manager 1135, as described with reference to Figure 11.

[0348] In 1920, the method may include identifying that at least two search space sets are linked for control channel iterations, based on the fact that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are associated with first and second search space set indices which are the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively. The operation of 1920 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1920 may be performed by a search space set linking configuration manager 1130, as described with reference to Figure 11.

[0349] In 1925, the method may include receiving at least one control message via a scheduling component carrier from the base station and within at least one decoding candidate from a set of decoding candidates, for which communication between the base station and the UE is scheduled via a scheduled component carrier. The operation of 1925 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1925 may be performed by a control message 1140, as described with reference to Figure 11.

[0350] In 1930, the method may include transmitting or receiving communications with a base station via a scheduled component carrier based on at least one control message. The operation of 1930 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1930 may be performed by a base station communications manager 1145, as described with reference to Figure 11.

[0351] Figure 20 shows a flowchart illustrating Method 2000, which supports a technique for control channel iteration for cross-carrier scheduling, according to aspects of the present disclosure. The operation of Method 2000 may be implemented by a base station or its components, as described herein. For example, the operation of Method 2000 may be performed by base station 105, as described with reference to Figures 1-8 and 13-16. In some examples, the base station may execute a set of instructions for controlling the base station's functional elements to perform the functions described. In addition or alternatively, the base station may perform aspects of the functions described using dedicated hardware.

[0352] In 2005, the method may include sending a control signaling to the UE that identifies a scheduling configuration indicating a first and second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier. The operation of 2005 may be performed according to examples such as those disclosed herein. In some examples, the operation of 2005 may be performed by a scheduling configuration manager 1525 as described with reference to Figure 15.

[0353] In 2010, the method may include identifying a search space set linking configuration for a set of multiple search space sets of a scheduled component carrier, based on the scheduling configuration. The operation of 2010 may be performed according to examples such as those disclosed herein. In some examples, the operation of 2010 may be performed by a search space set linking configuration manager 1530, as described with reference to Figure 15.

[0354] In 2015, the method may include identifying sets of decryption candidates in a first and second search space set of a scheduled component carrier, which are allocated for cross-carrier scheduling of the scheduled component carrier, based on the search space set linking configuration. The operation of 2015 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 2015 may be performed by a decryption candidate manager 1535, as described with reference to Figure 15.

[0355] In 2020, the method may include sending to the UE, and within at least one decoding candidate from a set of decoding candidates, at least one control message via a scheduling component carrier that schedules communication between the base station and the UE via a scheduled component carrier. The operation of 2020 may be performed according to examples such as those disclosed herein. In some examples, the operation of 2020 may be performed by a control message sender 1540, as described with reference to Figure 15.

[0356] In 2025, the method may include sending or receiving communications with the UE via a scheduled component carrier based on at least one control message. The operation of 2025 may be performed according to examples such as those disclosed herein. In some examples, the operation of 2025 may be performed by a UE communications manager 1545, as described with reference to Figure 15.

[0357] The following provides an overview of the aspects of this disclosure.

[0358] Embodiment 1: A method for wireless communication in a UE, comprising: receiving a control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from a scheduling component carrier; identifying a search space set linking configuration for a plurality of search space sets of the scheduled component carrier, at least in part on the scheduling configuration; identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier, at least in part on the search space set linking configuration, to be allocated for cross-carrier scheduling of the scheduled component carrier; receiving at least one control message from the base station via the scheduling component carrier for scheduling communication between the base station and the UE via the scheduled component carrier, and within at least one decoding candidate from the set of decoding candidates; and transmitting or receiving communication with the base station via the scheduled component carrier, at least in part on the at least one control message.

[0359] Embodiment 2: The method of Embodiment 1, wherein the step of identifying a search space set linking configuration includes receiving additional control signaling from a base station indicating a search space set linking configuration.

[0360] Embodiment 3: Any method from Embodiments 1 to 2, wherein the step of identifying a search space set linking configuration includes, at least in part, identifying that at least two of a plurality of search space sets of a scheduled component carrier are linked for control channel iterations, based on a scheduling configuration that indicates that a first search space set and a second search space set of the scheduling component carrier are linked for control channel iterations.

[0361] Embodiment 4: The method of Embodiment 3, further comprising the step of monitoring a first decoding candidate in a first search space set for a control message iteration, and a second decoding candidate in a second search space set linked to the first decoding candidate for a control message iteration, at least in part on the fact that at least two search space sets are linked for a control channel iteration.

[0362] Embodiment 5: Any method of Embodiments 1 to 4, wherein the step of identifying a search space set linking configuration includes identifying that at least two search space sets are linked for control channel iterations, at least on the basis that at least two of the multiple search space sets of a scheduled component carrier are associated with first and second search space set indices which are the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively.

[0363] Embodiment 6: Any method of Embodiments 1 to 5, wherein the step of identifying a search space set linking configuration includes identifying that at least two search space sets of a plurality of search space sets of a scheduled component carrier are linked for control channel iterations, at least on the basis that at least two of those search space sets consist of the same amount of decryption candidates per aggregation level.

[0364] Embodiment 7: Any method from Embodiments 1 to 6, wherein at least one decoding candidate from a set of decoding candidates comprises a pair of decoding candidates, and the method further includes the step of identifying that the pair of decoding candidates is linked for a control channel iteration, at least in part on the basis that the pair of decoding candidates corresponds to the same CIF, the same candidate index, and the same aggregation level.

[0365] Embodiment 8: The method of Embodiment 7, further comprising the step of identifying that a third set of monitoring occasions in a first search space set of the scheduling component carrier, and a fourth set of monitoring occasions in a second search space set of the scheduling component carrier, are not linked for control channel iterations for in-carrier scheduling.

[0366] Embodiment 9: Any method of Embodiments 1 to 8, wherein the step of identifying a search space set linking configuration includes the step of identifying that at least two of a plurality of search space sets of a scheduled component carrier are not linked for control channel iterations.

[0367] Embodiment 10: The method of Embodiment 9, further comprising the steps of monitoring a first decryption candidate in a first search space set for a control message and a second decryption candidate in a second search space set for a second control message different from the control message, at least in part on the step of identifying that at least two of the multiple search space sets of a scheduled component carrier are not linked for control channel iterations.

[0368] Embodiment 11: Any method of Embodiments 9 to 10, further comprising the step of identifying, at least in part, on the search space set linking configuration, that a first decoding candidate of a first search space set is not linked to a second decoding candidate of a second search space set for control channel iterations for cross-carrier scheduling on a scheduled component carrier.

[0369] Embodiment 12: The method of Embodiment 11, further comprising the step of identifying, at least in part, on a search space set linking configuration, that a third decoding candidate of a first search space set is linked to a fourth decoding candidate of a second search space set for control channel iterations for carrier in-carrier scheduling on a scheduling component carrier.

[0370] Embodiment 13: Any method from Embodiments 1 to 12, further comprising the step of receiving control signaling indicating one or more monitoring occasions for a first set of search space sets and one or more monitoring occasions for a second set of search space sets.

[0371] Embodiment 14: Any method of Embodiments 1 to 13, wherein the step of receiving a control signaling for identifying a scheduling configuration includes receiving a control signaling indicating a first search space set index associated with a first search space set of a scheduling component carrier and a second search space set index associated with a second search space set of a scheduling component carrier.

[0372] Embodiment 15: The method of Embodiment 14, wherein a third search space set and a fourth search space set among a plurality of search space sets of a scheduled component carrier are associated with a first search space set index and a second search space set index, respectively, and the search space set linking configuration indicates whether the third search space set and the fourth search space set are linked or not for control channel iterations, at least in part on the fact that the first search space set and the second search space set are linked for control channel iterations.

[0373] Embodiment 16: Any method of Embodiments 1 to 15, wherein the step of receiving a control signaling for identifying a scheduling configuration includes receiving a control signaling indicating that at least two of the multiple search space sets of the scheduled component carrier are configured within a first BWP of the scheduled component carrier, and that the first and second search space sets of the scheduling component carrier are configured within a second BWP of the scheduling component carrier.

[0374] Embodiment 17: Any method from Embodiments 1 to 16, further comprising the steps of receiving additional control signaling indicating that a first BWP associated with a first search space set and a second search space set of a scheduling component carrier is active, and that a second BWP associated with a plurality of search space sets of a scheduled component carrier is active; and monitoring a first decryption candidate for the first search space set and a second decryption candidate for the second search space set for one or more iterations of a control message, at least in part on the fact that the first and second BWPs are active.

[0375] Embodiment 18: Any method of Embodiments 1 to 17, further comprising the step of monitoring a first decode candidate of the first search space set for a second control message and a second decode candidate of the second search space set for an iteration of the second control message, at least in part on the first search space set being linked to a second search space set for control channel iterations for in-carrier scheduling on a scheduling component carrier, wherein the second control message schedules a second communication between a UE and a base station via a scheduling component carrier.

[0376] Embodiment 19: Any method from Embodiments 1 to 18, wherein a first decoding candidate in a first search space set and a second decoding candidate in a second search space set are associated with a first CIF value corresponding to a scheduling component carrier, and a third decoding candidate in a first search space set and a fourth decoding candidate in a second search space set are associated with a second CIF value different from the first CIF value, corresponding to a scheduled component carrier.

[0377] Embodiment 20: Any method of Embodiments 1 to 19, further comprising: receiving additional control signaling from a base station indicating a plurality of component carriers, including a scheduled component carrier configured for cross-carrier scheduling via control channel iterations; and identifying, at least in part, based on the indication of the plurality of component carriers, that a first decoding candidate of a first search space set is linked to a second decoding candidate of a second search space set for control channel iterations for cross-carrier scheduling on the scheduled component carriers.

[0378] Embodiment 21: Any method of Embodiments 1 to 20, further comprising: receiving additional control signaling from a base station indicating a plurality of component carriers, including a scheduled component carrier configured for cross-carrier scheduling via control channel iterations on a scheduling component carrier; and identifying, at least in part, based on the indications of the plurality of component carriers, that a first decoding candidate of a first search space set is linked to a second decoding candidate of a second search space set for control channel iterations for cross-carrier scheduling on a scheduled component carrier.

[0379] Embodiment 22: Any method from Embodiments 1 to 21, wherein the multiple search space sets of the scheduled component carrier comprise a third search space set and a fourth search space set, the first search space set of the scheduling component carrier and the third search space set of the scheduled component carrier are associated with a first search space set index, and the second search space set of the scheduling component carrier and the fourth search space set of the scheduled component carrier are associated with a second search space set index different from the first search space set index.

[0380] Embodiment 23: A method for wireless communication at a base station, comprising: transmitting a control signaling to a UE that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from a scheduling component carrier; identifying a search space set linking configuration for a plurality of search space sets of the scheduled component carrier, at least in part on the scheduling configuration; identifying a set of decoding candidates in the first search space set and the second search space set of the scheduling component carrier, at least in part on the search space set linking configuration, to be allocated for cross-carrier scheduling of the scheduled component carrier; transmitting at least one control message to the UE via the scheduling component carrier, and in at least one decoding candidate from the set of decoding candidates, for scheduling communication between the base station and the UE via the scheduled component carrier; and transmitting or receiving communication with the UE via the scheduled component carrier, at least in part on the at least one control message.

[0381] Embodiment 24: The method of Embodiment 23, wherein the step of identifying a search space set linking configuration includes the step of sending additional control signaling indicating the search space set linking configuration to the UE.

[0382] Embodiment 25: Any method of Embodiments 23 to 24, wherein the step of identifying a search space set linking configuration includes, at least in part, identifying that at least two of a plurality of search space sets of a scheduled component carrier are linked for control channel iterations, based on a scheduling configuration that indicates that a first search space set and a second search space set of the scheduling component carrier are linked for control channel iterations.

[0383] Embodiment 26: Any method of Embodiments 23 to 25, wherein the step of identifying a search space set linking configuration includes identifying that at least two search space sets are linked for control channel iterations, at least on the basis that at least two of the search space sets of a plurality of search space sets of a scheduled component carrier are associated with first and second search space set indices which are the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively.

[0384] Embodiment 27: Any method of Embodiments 23 to 26, wherein the step of identifying a search space set linking configuration includes identifying that at least two search space sets of a plurality of search space sets of a scheduled component carrier are linked for control channel iterations, at least on the basis that at least two of those search space sets consist of the same amount of decryption candidates per aggregation level.

[0385] Embodiment 28: Any method of Embodiments 23 to 27, wherein the step of identifying a search space set linking configuration includes identifying that each pair of decryption candidates across first and second search space sets for two monitoring occasions is linked for control channel iterations, and that at least two of a plurality of search space sets of a scheduled component carrier are linked for control channel iterations, at least on the basis that each pair of decryption candidates linked for control channel iterations corresponds to the same CIF, the same candidate index, and the same aggregation level.

[0386] Embodiment 29: The method of Embodiment 28, further comprising the step of identifying that a third set of monitoring occasions in a first search space set of the scheduling component carrier, and a fourth set of monitoring occasions in a second search space set of the scheduling component carrier, are not linked for control channel iterations for in-carrier scheduling.

[0387] Embodiment 30: Any method of Embodiments 23 to 29, wherein the step of identifying a search space set linking configuration includes the step of identifying that at least two of the multiple search space sets of a scheduled component carrier are not linked for control channel iterations.

[0388] Embodiment 31: The method of Embodiment 30, further comprising the step of identifying, at least in part, on a search space set linking configuration, that a first decoding candidate of a first search space set is not linked to a second decoding candidate of a second search space set for control channel iterations for cross-carrier scheduling on a scheduled component carrier.

[0389] Embodiment 32: The method of Embodiment 31, further comprising the step of identifying, at least in part, on a search space set linking configuration, that a third decoding candidate of a first search space set is linked to a fourth decoding candidate of a second search space set for control channel iterations for carrier in-carrier scheduling on a scheduling component carrier.

[0390] Embodiment 33: Any method of Embodiments 23 to 32, further comprising the step of sending control signaling indicating one or more monitoring occasions for a first set of search space sets and one or more monitoring occasions for a second set of search space sets.

[0391] Embodiment 34: Any method of Embodiments 23 to 33, wherein the step of transmitting a control signaling for identifying a scheduling configuration includes transmitting a control signaling indicating a first search space set index associated with a first search space set of a scheduling component carrier and a second search space set index associated with a second search space set of a scheduling component carrier.

[0392] Embodiment 35: The method of Embodiment 34, wherein a third search space set and a fourth search space set of a plurality of search space sets of a scheduled component carrier are associated with a first search space set index and a second search space set index, respectively, and the search space set linking configuration indicates whether the third search space set and the fourth search space set are linked or not for control channel iterations, at least in part on the fact that the first search space set and the second search space set are linked for control channel iterations.

[0393] Embodiment 36: Any method of Embodiments 23 to 35, wherein the step of transmitting a control signaling for identifying a scheduling configuration includes transmitting a control signaling indicating that at least two of the multiple search space sets of the scheduled component carrier are configured within a first BWP of the scheduled component carrier, and that the first and second search space sets of the scheduling component carrier are configured within a second BWP of the scheduling component carrier.

[0394] Embodiment 37: Any method of Embodiments 23 to 36, further comprising the step of sending additional control signaling indicating that a first BWP associated with a first search space set and a second search space set of a scheduling component carrier is active, and that a second BWP associated with a plurality of search space sets of a scheduled component carrier is active, wherein the step of sending at least one control message is at least partially based on the fact that the first BWP and the second BWP are active.

[0395] Embodiment 38: Any of embodiments 23 to 37, wherein a first decoding candidate in a first search space set and a second decoding candidate in a second search space set are associated with a first CIF value corresponding to a scheduling component carrier, and a third decoding candidate in a first search space set and a fourth decoding candidate in a second search space set are associated with a second CIF value different from the first CIF value, corresponding to a scheduled component carrier.

[0396] Embodiment 39: Any method of Embodiments 23 to 38, further comprising the steps of: sending additional control signaling to a UE indicating a plurality of component carriers, including a scheduled component carrier configured for cross-carrier scheduling via control channel iterations; and identifying, at least in part, based on the indication of the plurality of component carriers, that a first decoding candidate in a first search space set is linked to a second decoding candidate in a second search space set for control channel iterations for cross-carrier scheduling on the scheduled component carriers.

[0397] Embodiment 40: Any method of Embodiments 23 to 39, further comprising the steps of: sending additional control signaling to a UE indicating a plurality of component carriers, including a scheduled component carrier configured for cross-carrier scheduling via control channel iterations on a scheduling component carrier; and identifying, at least in part, based on the indication of the plurality of component carriers, that a first decoding candidate in a first search space set is linked to a second decoding candidate in a second search space set for control channel iterations for cross-carrier scheduling on a scheduled component carrier.

[0398] Embodiment 41: Any of Embodiments 23 to 40, wherein the multiple search space sets of the scheduled component carrier comprise a third search space set and a fourth search space set, the first search space set of the scheduling component carrier and the third search space set of the scheduled component carrier are associated with a first search space set index, and the second search space set of the scheduling component carrier and the fourth search space set of the scheduled component carrier are associated with a second search space set index different from the first search space set index.

[0399] Embodiment 42: A device for wireless communication in a UE, comprising a processor, a memory coupled to the processor, and instructions stored in the memory that can be executed by the processor to cause the device to perform any of the methods in Embodiments 1 to 22.

[0400] Embodiment 43: An apparatus for wireless communication in a UE, comprising at least one means for performing any of the me...

Claims

1. A device for wireless communication in user equipment (UE), Processor and The memory coupled to the aforementioned processor, The device comprises instructions stored in the memory, and the instructions are transmitted to the device. Receiving control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier, Identifying a search space set linking configuration for multiple search space sets of the scheduled component carrier, based at least in part on the scheduling configuration in the received control signaling, Identifying, at least in part, the sets of decryption candidates in the first and second search space sets of the scheduling component carrier, which are allocated for cross-carrier scheduling of the scheduled component carrier, based on the identified search space set linking configuration, Identifying that at least two of the plurality of search space sets of the scheduled component carrier are linked for control channel iterations, at least in part on the fact that at least two of the search space sets of the scheduled component carrier are associated with first and second search space set indices which are the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively, Receiving from the base station and within at least one decoding candidate from the set of identified decoding candidates via the scheduling component carrier, which schedules communication between the base station and the UE via the scheduled component carrier, Transmit or receive the communication with the base station via the scheduled component carrier, at least in part, based on the at least one control message. A device that is executable by the processor in order to perform the following.

2. The set of decoding candidates includes at least one decoding candidate, and the instruction is given to the device, Identifying that the pair of decoding candidates is linked for control channel iterations, at least in part, on the basis that the pair of decoding candidates corresponds to the same carrier indicator field, the same candidate index, and the same aggregation level. The apparatus according to claim 1, further executable by the processor to perform the following.

3. The command for receiving the control signaling that identifies the scheduling configuration is transmitted to the device. Receiving the control signaling which indicates a first search space set index associated with the first search space set of the scheduling component carrier and a second search space set index associated with the second search space set of the scheduling component carrier. The apparatus according to claim 1, which is executable by the processor to perform the following.

4. The apparatus according to claim 3, wherein a third search space set and a fourth search space set of the plurality of search space sets of the scheduled component carrier are associated with the first search space set index and the second search space set index, respectively, and the search space set linking configuration indicates that the third search space set and the fourth search space set are linked or unlinked for control channel iterations, at least in part on the basis that the first search space set and the second search space set are linked for control channel iterations.

5. The instruction for identifying the search space set linking configuration is given to the device, Receiving additional control signaling from the base station indicating the search space set linking configuration. The apparatus according to claim 1, which is executable by the processor to perform the following.

6. The instruction for identifying the search space set linking configuration is given to the device, Based at least in part on the scheduling configuration, it is possible to identify that at least two of the plurality of search space sets of the scheduled component carrier are linked for control channel iterations, indicating that the first and second search space sets of the scheduling component carrier are linked for control channel iterations. The apparatus according to claim 1, which is executable by the processor to perform the following.

7. The command to the device, At least in part, based on the fact that the at least two search space sets are linked for control channel iterations, the system monitors a first decoding candidate in the first search space set for the control message iterations, and a second decoding candidate in the second search space set, linked to the first decoding candidate, for the control message iterations. The apparatus according to claim 6, further executable by the processor to perform the following.

8. The command to the device, Identifying that a third set of monitoring occasions in the first search space set of the scheduling component carrier, and a fourth set of monitoring occasions in the second search space set of the scheduling component carrier, are not linked for control channel iterations for in-carrier scheduling. The apparatus according to claim 6, further executable by the processor to perform the following.

9. The instruction for identifying the search space set linking configuration is given to the device, Identifying that at least two of the multiple search space sets of the scheduled component carrier are not linked for control channel iterations. The apparatus according to claim 1, which is executable by the processor to perform the following.

10. The command to the device, Monitoring a first decoding candidate in the first search space set for the control message and a second decoding candidate in the second search space set for a second control message different from the control message, at least in part based on identifying that at least two of the plurality of search space sets of the scheduled component carrier are not linked for control channel iterations. The apparatus according to claim 9, further executable by the processor to perform the following.

11. The command to the device, Identifying, at least partially based on the search space set linking configuration, that the first decoding candidate of the first search space set is not linked to the second decoding candidate of the second search space set for control channel iterations for cross-carrier scheduling on the scheduled component carrier. The apparatus according to claim 9, further executable by the processor to perform the following.

12. The command to the device, Identifying, at least in part, based on the search space set linking configuration, that the third decoding candidate of the first search space set is linked to the fourth decoding candidate of the second search space set for control channel iterations for in-carrier scheduling on the scheduling component carrier. The apparatus according to claim 11, further executable by the processor to perform the following.

13. The command to the device, Receiving the control signaling indicating a first set of one or more monitoring occasions for the first set of search space and a second set of one or more monitoring occasions for the second set of search space The apparatus according to claim 1, further executable by the processor to perform the following.

14. The command for receiving the control signaling that identifies the scheduling configuration is transmitted to the device. Receiving the control signaling indicating that at least two of the plurality of search space sets of the scheduled component carrier are configured within a first bandwidth part of the scheduled component carrier, and that the first and second search space sets of the scheduling component carrier are configured within a second bandwidth part of the scheduling component carrier. The apparatus according to claim 1, which is executable by the processor to perform the following.

15. The command to the device, Receiving additional control signaling indicating that the first bandwidth part associated with the first and second search space sets of the scheduling component carrier is active, and that the second bandwidth part associated with the plurality of search space sets of the scheduled component carrier is active, and Based at least in part on the fact that the first bandwidth part and the second bandwidth part are active, monitor for one or more iterations of the control message a first decryption candidate in the first search space set and a second decryption candidate in the second search space set. The apparatus according to claim 1, further executable by the processor to perform the following.

16. The command to the device, The first search space set monitors a first decoded candidate of the first search space set for a second control message and a second decoded candidate of the second search space set for an iteration of the second control message, at least in part on the first search space set being linked to the second search space set for control channel iterations for in-carrier scheduling on the scheduling component carrier, wherein the second control message schedules a second communication between the UE and the base station via the scheduling component carrier. The apparatus according to claim 1, further executable by the processor to perform the following.

17. The first decoding candidate of the first search space set and the second decoding candidate of the second search space set are associated with the first carrier indicator field value corresponding to the scheduling component carrier, The apparatus according to claim 1, wherein the third decoding candidate of the first search space set and the fourth decoding candidate of the second search space set are associated with a second carrier indicator field value that corresponds to the scheduled component carrier and is different from the first carrier indicator field value.

18. The command to the device, Receiving additional control signaling from the base station, indicating a plurality of component carriers, including the scheduled component carrier, configured for cross-carrier scheduling via control channel iterations, and Based at least in part on the instructions for the plurality of component carriers, it is identified that the first decoding candidate of the first search space set is linked to the second decoding candidate of the second search space set for control channel iterations for cross-carrier scheduling on the scheduled component carrier. The apparatus according to claim 1, further executable by the processor to perform the following.

19. The command to the device, Receiving additional control signaling from the base station indicating a plurality of component carriers, including the scheduled component carrier, configured for cross-carrier scheduling via control channel iterations on the scheduling component carrier, and Based at least in part on the instructions for the plurality of component carriers, it is identified that the first decoding candidate of the first search space set is linked to the second decoding candidate of the second search space set for control channel iterations for cross-carrier scheduling on the scheduled component carrier. The apparatus according to claim 1, further executable by the processor to perform the following.

20. The plurality of search space sets of the scheduled component carrier comprises a third search space set and a fourth search space set, The first search space set of the scheduling component carrier and the third search space set of the scheduled component carrier are associated with the first search space set index. The apparatus according to claim 1, wherein the second search space set of the scheduling component carrier and the fourth search space set of the scheduled component carrier are associated with a second search space set index different from the first search space set index.

21. A device for wireless communication at a base station, Processor and The memory coupled to the aforementioned processor, The device comprises instructions stored in the memory, and the instructions are transmitted to the device. To transmit a control signaling to user equipment (UE) that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier, Identifying a search space set linking configuration for multiple search space sets of the scheduled component carrier, at least in part, based on the transmitted scheduling configuration. Identifying, at least in part, the sets of decryption candidates in the first and second search space sets of the scheduling component carrier, which are allocated for cross-carrier scheduling of the scheduled component carrier, based on the identified search space set linking configuration, Identifying that at least two of the plurality of search space sets of the scheduled component carrier are linked for control channel iterations, at least in part on the fact that at least two of the search space sets of the scheduled component carrier are associated with first and second search space set indices which are the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively, Sending to the UE, and within at least one decoding candidate from the set of identified decoding candidates, at least one control message via the scheduling component carrier to schedule communication between the base station and the UE via the scheduled component carrier, Transmit or receive the communication with the UE via the scheduled component carrier, at least in part, based on the at least one control message transmitted. A device that is executable by the processor in order to perform the following.

22. A method for wireless communication in user equipment (UE), Steps include receiving a control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier, The steps include identifying a search space set linking configuration for a plurality of search space sets of the scheduled component carrier, based at least in part on the scheduling configuration in the received control signaling, The steps include identifying a set of decryption candidates in the first search space set and the second search space set of the scheduling component carrier, which are allocated for cross-carrier scheduling of the scheduled component carrier, at least in part on the identified search space set linking configuration, The steps of identifying that at least two of the plurality of search space sets of the scheduled component carrier are linked for control channel iterations, at least on the basis that at least two of the search space sets of the scheduled component carrier are associated with first and second search space set indices which are the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively, The steps include receiving at least one control message via the scheduling component carrier from the base station, and within at least one decoding candidate from the set of identified decoding candidates, for scheduling communication between the base station and the UE via the scheduled component carrier, The steps of transmitting or receiving the communication with the base station via the scheduled component carrier, based at least in part on the at least one control message, and A method that includes this.

23. The set of decoding candidates includes at least one decoding candidate comprising a pair of decoding candidates, and the method The step of identifying that the pair of decoding candidates is linked for control channel iterations, at least in part on the basis that the pair of decoding candidates corresponds to the same carrier indicator field, the same candidate index, and the same aggregation level. The method according to claim 22, further comprising:

24. The step of receiving the control signaling to identify the scheduling configuration is: The step of receiving the control signaling, which indicates a first search space set index associated with the first search space set of the scheduling component carrier and a second search space set index associated with the second search space set of the scheduling component carrier. The method according to claim 22, including the method described in claim 22.

25. The method according to claim 24, wherein a third search space set and a fourth search space set of the plurality of search space sets of the scheduled component carrier are associated with the first search space set index and the second search space set index, respectively, and the search space set linking configuration indicates that the third search space set and the fourth search space set are linked or not linked for control channel iterations, at least in part on the fact that the first search space set and the second search space set are linked for control channel iterations.

26. The step of identifying the search space set linking configuration is, The step of receiving additional control signaling from the base station indicating the search space set linking configuration. The method according to claim 22, including the method described in claim 22.

27. The step of identifying the search space set linking configuration is, A step of identifying, at least in part, that at least two of the plurality of search space sets of the scheduled component carrier are linked for control channel iterations, based at least in part on the scheduling configuration, that the first search space set and the second search space set of the scheduling component carrier are linked for control channel iterations. The method according to claim 22, including the method described in claim 22.

28. The steps include, at least in part, monitoring a first decoding candidate in the first search space set for the control message iteration, and a second decoding candidate in the second search space set linked to the first decoding candidate for the control message iteration, based at least in part on the fact that the at least two search space sets are linked for control channel iterations. The method according to claim 27, further comprising:

29. Steps to identify that a third set of monitoring occasions in the first search space set of the scheduling component carrier, and a fourth set of monitoring occasions in the second search space set of the scheduling component carrier, are not linked for control channel iterations for in-carrier scheduling. The method according to claim 22, further comprising:

30. The step of identifying the search space set linking configuration is, Step 1: Identify that at least two of the plurality of search space sets of the scheduled component carrier are not linked for control channel iterations. The method according to claim 22, including the method described in claim 22.

31. Steps to monitor a first decryption candidate in the first search space set for the control message and a second decryption candidate in the second search space set for a second control message different from the control message, at least in part based on identifying that at least two of the plurality of search space sets of the scheduled component carrier are not linked for control channel iterations. The method according to claim 30, further comprising:

32. Steps to identify, at least in part, based on the search space set linking configuration, that the first decoding candidate of the first search space set is not linked to the second decoding candidate of the second search space set for control channel iterations for cross-carrier scheduling on the scheduled component carrier. The method according to claim 30, further comprising:

33. Steps to identify, at least in part, based on the search space set linking configuration, that the third decoding candidate of the first search space set is linked to the fourth decoding candidate of the second search space set for control channel iterations for carrier in-carrier scheduling on the scheduling component carrier. The method according to claim 32, further comprising:

34. The step of receiving the control signaling, which indicates a first set of one or more monitoring occasions for the first set of search space and a second set of one or more monitoring occasions for the second set of search space. The method according to claim 22, further comprising:

35. The step of receiving the control signaling to identify the scheduling configuration is: The step of receiving the control signaling indicating that at least two of the plurality of search space sets of the scheduled component carrier are configured within a first bandwidth part of the scheduled component carrier, and that the first and second search space sets of the scheduling component carrier are configured within a second bandwidth part of the scheduling component carrier. The method according to claim 22, including the method described in claim 22.

36. The steps include receiving additional control signaling indicating that a first bandwidth part associated with the first and second search space sets of the scheduling component carrier is active, and that a second bandwidth part associated with the plurality of search space sets of the scheduled component carrier is active, The steps include: monitoring for one or more iterations of the control message, at least in part, that the first bandwidth part and the second bandwidth part are active, a first decryption candidate in the first search space set and a second decryption candidate in the second search space set; The method according to claim 22, further comprising:

37. Steps of monitoring a first decode candidate of the first search space set for a second control message and a second decode candidate of the second search space set for an iteration of the second control message, at least in part on the first search space set being linked to the second search space set for control channel iterations for in-carrier scheduling on the scheduling component carrier, wherein the second control message schedules a second communication between the UE and the base station via the scheduling component carrier. The method according to claim 22, further comprising:

38. The first decoding candidate of the first search space set and the second decoding candidate of the second search space set are associated with the first carrier indicator field value corresponding to the scheduling component carrier, The method according to claim 22, wherein the third decoding candidate of the first search space set and the fourth decoding candidate of the second search space set are associated with a second carrier indicator field value that corresponds to the scheduled component carrier and is different from the first carrier indicator field value.

39. The steps include receiving additional control signaling from the base station, indicating a plurality of component carriers, including the scheduled component carrier, configured for cross-carrier scheduling via control channel iterations, The steps include identifying, at least in part, based on the instructions for the plurality of component carriers, that a first decoding candidate in the first search space set is linked to a second decoding candidate in the second search space set for control channel iterations for cross-carrier scheduling on the scheduled component carriers, and The method according to claim 22, further comprising:

40. The steps include receiving additional control signaling from the base station, indicating a plurality of component carriers, including the scheduled component carrier, configured for cross-carrier scheduling via control channel iterations on the scheduling component carrier, The steps include identifying, at least in part, based on the instructions for the plurality of component carriers, that a first decoding candidate in the first search space set is linked to a second decoding candidate in the second search space set for control channel iterations for cross-carrier scheduling on the scheduled component carriers, and The method according to claim 22, further comprising:

41. The plurality of search space sets of the scheduled component carrier comprises a third search space set and a fourth search space set, The first search space set of the scheduling component carrier and the third search space set of the scheduled component carrier are associated with the first search space set index. The method according to claim 22, wherein the second search space set of the scheduling component carrier and the fourth search space set of the scheduled component carrier are associated with a second search space set index different from the first search space set index.

42. A method for wireless communication at a base station, The steps include: transmitting a control signaling to user equipment (UE) that identifies a scheduling configuration indicating a first search space set and a second search space set of a scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier; The steps include identifying a search space set linking configuration for a plurality of search space sets of the scheduled component carrier, based at least in part on the transmitted scheduling configuration, The steps include identifying a set of decryption candidates in the first search space set and the second search space set of the scheduling component carrier, which are allocated for cross-carrier scheduling of the scheduled component carrier, at least in part on the identified search space set linking configuration, The steps of identifying that at least two of the plurality of search space sets of the scheduled component carrier are linked for control channel iterations, at least on the basis that at least two of the search space sets of the scheduled component carrier are associated with first and second search space set indices which are the same as the first and second search space set indices of the first and second search space sets of the scheduling component carrier, respectively, The steps include sending at least one control message via the scheduling component carrier to the UE, and within at least one decoding candidate from the set of identified decoding candidates, to schedule communication between the base station and the UE via the scheduled component carrier, The steps include: transmitting or receiving the communication with the UE via the scheduled component carrier, based at least in part on the at least one control message transmitted; A method that includes this.

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