Techniques for Control Channel Repetition 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, entitled “TECHNIQUES FOR CONTROL CHANNEL REPETITION FOR CROSS-CARRIER SCHEDULING,” filed January 24, 2022, which claims the benefit of U.S. Provisional Patent Application No. 63 / 163,522, entitled “TECHNIQUES FOR CONTROL CHANNEL REPETITION FOR CROSS-CARRIER SCHEDULING,” filed March 19, 2021, by KHOSHNEVISAN et al., which is assigned to the assignee of this application and expressly incorporated herein by reference.

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

[0003] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasts, and the like. These systems may be capable of supporting 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) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems, sometimes referred to as 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), etc. 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 in some cases 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, search space sets on a scheduling component carrier may be linked together for control channel repetition to improve transmit diversity and reliability of the wireless communications. However, some wireless communications exhibit limitations in the ability of scheduled component carriers to be scheduled via control channel repetition carried on the scheduling component carrier. Summary of the Invention [Means for solving the problem]

[0005] The described techniques relate to improved methods, systems, devices, and apparatuses that support techniques for control channel repetition for cross-carrier scheduling. In general, aspects of the present disclosure provide techniques for cross-carrier scheduling using control channel repetition. In particular, aspects of the present disclosure provide techniques and configurations that enable multiple search space sets on a scheduled component carrier to be linked for control channel repetition to multiple search space sets on a scheduling component carrier to provide cross-carrier scheduling. Thus, the techniques described herein enable communications to be scheduled on a scheduled component carrier via control channel repetition across a search space set of the scheduling component carrier.

[0006] A method for wireless communication in a user equipment (UE) is described. The method may include receiving control signaling from a base station, the control signaling identifying a scheduling configuration indicating a first search space set and a second search space set of the 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 a plurality of 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 that are 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 and over the scheduling component carrier, the control message scheduling communication between the base station and the UE over the scheduled component carrier within at least one decoding candidate of the set of decoding candidates, and transmitting or receiving communication with the base station over the scheduled component carrier based on the at least one control message.

[0007] An apparatus for wireless communication in a UE is described. The apparatus may include a processor, a 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 control signaling from a base station, identifying a scheduling configuration indicating a first search space set and a second search space set of the 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 a plurality of search space sets of the scheduled component carrier based on the scheduling configuration, identifying a set of decoding candidates within 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, receiving at least one control message from the base station and via the scheduling component carrier that schedules communication between the base station and the UE via the scheduled component carrier within at least one decoding candidate of 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.

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

[0009] A non-transitory computer-readable medium storing code for wireless communications in a UE is described, wherein the code may include instructions executable by a processor to receive control signaling from a base station to identify a scheduling configuration indicating a first search space set and a second search space set of the 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 a plurality of search space sets of the scheduled component carrier based on the scheduling configuration, identify a set of decoding candidates within 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 and via the scheduling component carrier to schedule communications between the base station and the UE via the scheduled component carrier within at least one decoding candidate of the set of decoding candidates, and transmit or receive communications with the base station via the scheduled component carrier based on the at least one control message.

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

[0011] In some examples of the methods, apparatus, and non-transitory 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 may be linked for control channel repetition based on a scheduling configuration indicating that a first search space set and a second search space set of a scheduled component carrier may be linked for control channel repetition.

[0012] Some examples of the methods, apparatus, and non-transitory 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 repetition of the control message and a second decoding candidate in a second search space set for the repetition of the control message, which may be linked to the first decoding candidate based on at least two search space sets being linked for the control channel repetition.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, identifying the search space set linking configuration may include operations, features, means, or instructions for identifying that at least two search space sets may be linked for control channel repetition based on at least two search space sets of a set of multiple search space sets of a scheduled component carrier being associated with first and second search space set indexes that may be the same as first and second search space set indexes of a first and second search space set of a scheduling component carrier, respectively.

[0014] In some examples of the methods, apparatus, and non-transitory 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 are configured with the same amount of decoding candidates per aggregation level, and that at least two search space sets can be linked for control channel repetition.

[0015] In some examples of the methods, apparatus, and non-transitory 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 repetition, and identifying that the at least two search space sets are configured with the same amount of decoding candidates per aggregation level based on the at least two search space sets being linked for control channel repetition.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, at least one decoding candidate of the set of decoding candidates includes a pair of decoding candidates, and the methods, apparatus, and non-transitory 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 repetition based on the pair of decoding candidates corresponding to the same carrier indicator field (CIF), the same candidate index, and the same aggregation level.

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

[0018] In some examples of the methods, apparatus, and non-transitory 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 may not be linked due to control channel repetition.

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

[0020] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include an operation, feature, means, or instruction for identifying, based on the search space set linking configuration, that a first decoding candidate of a first search space set may not be linked for control channel repetition to a second decoding candidate of a second search space set for cross-carrier scheduling on the scheduled component carrier.

[0021] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include an operation, feature, means, or instruction for identifying, based on a search space set linking configuration, that a third decoding candidate of a first search space set may be linked for control channel repetition to a fourth decoding candidate of a second search space set for intra-carrier scheduling on the scheduling component carrier.

[0022] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include an operation, feature, means, or instruction for receiving control signaling indicating 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, apparatus, and non-transitory computer-readable media described herein, receiving control signaling identifying a scheduling configuration may include acts, features, means, or instructions for receiving control signaling indicating 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.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a third search space set and a fourth search space set of 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 a search space set linking configuration indicates that the third search space set and the fourth search space set may or may not be linked for control channel repetition based on the first search space set and the second search space set being linked for control channel repetition.

[0025] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling identifying a scheduling configuration may include operations, features, means, or instructions for receiving control signaling indicating that at least two search space sets of a set of a plurality of 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 search space set and a second search space set of the scheduling component carrier may be configured within a second BWP of the scheduling component carrier.

[0026] Some examples of the methods, apparatus, and non-transitory 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 the scheduling component carrier may be active, and a second BWP associated with a set of multiple search space sets of the scheduled component carrier may be active, and monitoring a first decoding candidate of the first search space set and a second decoding candidate of the second search space set for one or more iterations of the control message based on the first BWP and the second BWP being active.

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

[0028] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first decoding candidate of a first search space set and a second decoding candidate of a second search space set may be associated with a first CIF value corresponding to a scheduling component carrier, and a third decoding candidate of the first search space set and a fourth decoding candidate of the 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 the methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for receiving additional control signaling from the base station indicating a set of multiple component carriers, including a scheduled component carrier, that may be configured for cross-carrier scheduling via control channel repetition, 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 repetition to a second decoding candidate of a second search space set for cross-carrier scheduling on the scheduled component carrier.

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

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of multiple search space sets of the scheduled component carrier may include a third search space set and a fourth search space set, where 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 that is different from the first search space set index.

[0032] A method for wireless communication in a base station is described, which may include transmitting control signaling to a UE, the scheduling configuration indicating a first search space set and a second search space set of the 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 a plurality of 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 that are allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration, transmitting at least one control message via the scheduling component carrier to the UE and within at least one decoding candidate of 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] An apparatus for wireless communication in a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: transmit control signaling to a UE, identifying a scheduling configuration indicating a first search space set and a second search space set of the 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 a plurality of search space sets of the scheduled component carrier based on the scheduling configuration, identify a set of decoding candidates within 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 to the UE and within at least one decoding candidate of the set of decoding candidates, and transmit or receive communication with the UE via the scheduled component carrier based on the at least one control message.

[0034] Another apparatus for wireless communication in a base station is described. The apparatus may include means for transmitting control signaling to a UE, the scheduling configuration indicating a first search space set and a second search space set of the 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 a plurality of 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 via the scheduling component carrier to the UE and within at least one decoding candidate of the set of decoding candidates, and means for transmitting or receiving communication with the UE via the scheduled component carrier based on the at least one control message.

[0035] A non-transitory computer-readable medium storing code for wireless communications in a base station is described, wherein the code may include instructions executable by a processor to: transmit control signaling to a UE, identifying a scheduling configuration indicating a first search space set and a second search space set of the scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier, identifying a search space set linking configuration for a set of a plurality of search space sets of the scheduled component carrier based on the scheduling configuration, identifying a set of decoding candidates within 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, transmitting at least one control message via the scheduling component carrier to the UE and within at least one decoding candidate of the set of decoding candidates, scheduling communications between the base station and the UE via the scheduled component carrier, and transmitting or receiving communications with the UE via the scheduled component carrier based on the at least one control message.

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

[0037] In some examples of the methods, apparatus, and non-transitory 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 may be linked for control channel repetition based on a scheduling configuration indicating that a first search space set and a second search space set of a scheduled component carrier may be linked for control channel repetition.

[0038] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, identifying the search space set linking configuration may include operations, features, means, or instructions for identifying that at least two search space sets may be linked for control channel repetition based on at least two search space sets of a set of multiple search space sets of a scheduled component carrier being associated with first and second search space set indexes that may be the same as first and second search space set indexes of a first and second search space set of a scheduling component carrier, respectively.

[0039] In some examples of the methods, apparatus, and non-transitory 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 are configured with the same amount of decoding candidates per aggregation level, and that at least two search space sets can be linked for control channel repetition.

[0040] In some examples of the methods, apparatus, and non-transitory 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 repetition, and identifying that the at least two search space sets are configured with the same amount of decoding candidates per aggregation level based on the at least two search space sets being linked for control channel repetition.

[0041] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, identifying the 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 may be linked for control channel repetition based on each pair of decoding candidates across first and second search space sets for two monitoring occasions being linked for control channel repetition, and each pair of decoding candidates linked for control channel repetition corresponding to the same CIF, the same candidate index, and the same aggregation level.

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

[0043] In some examples of the methods, apparatus, and non-transitory 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 may not be linked due to control channel repetition.

[0044] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include an operation, feature, means, or instruction for identifying, based on the search space set linking configuration, that a first decoding candidate of a first search space set may not be linked for control channel repetition to a second decoding candidate of a second search space set for cross-carrier scheduling on the scheduled component carrier.

[0045] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include an operation, feature, means, or instruction for identifying, based on a search space set linking configuration, that a third decoding candidate of a first search space set may be linked for control channel repetition to a fourth decoding candidate of a second search space set for intra-carrier scheduling on the scheduling component carrier.

[0046] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include an operation, feature, means, or instruction for transmitting control signaling indicating 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.

[0047] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling identifying a scheduling configuration may include an operation, feature, means, or instruction for transmitting control signaling indicating 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.

[0048] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a third search space set and a fourth search space set of 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 a search space set linking configuration indicates that the third search space set and the fourth search space set may or may not be linked for control channel repetition based on the first search space set and the second search space set being linked for control channel repetition.

[0049] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling identifying the scheduling configuration may include acts, features, means, or instructions for transmitting control signaling indicating that at least two search space sets 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 search space set and a second search space set of the scheduling component carrier may be configured within a second BWP of the scheduling component carrier.

[0050] Some examples of the methods, apparatus, and non-transitory 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 the scheduling component carrier may be active, and a second BWP associated with a set of multiple search space sets of the scheduled component carrier may be active, where transmitting the at least one control message may be based on the first BWP and the second BWP being active.

[0051] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first decoding candidate of a first search space set and a second decoding candidate of a second search space set may be associated with a first CIF value corresponding to a scheduling component carrier, and a third decoding candidate of the first search space set and a fourth decoding candidate of the 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 the methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: transmitting additional control signaling to the UE indicating a set of multiple component carriers, including a scheduled component carrier, that may be configured for cross-carrier scheduling via control channel repetition, 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 repetition to a second decoding candidate of a second search space set for cross-carrier scheduling on the scheduled component carrier.

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

[0054] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of multiple search space sets of the scheduled component carrier may include a third search space set and a fourth search space set, where 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 that is different from the first search space set index. [Brief description of the drawings]

[0055] [Figure 1] FIG. 1 illustrates an example of a wireless communication system that supports techniques for control channel repetition for cross-carrier scheduling, according to aspects of the present disclosure. [Diagram 2] FIG. 1 illustrates an example of a resource configuration that supports techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the present disclosure. [Diagram 3]FIG. 1 illustrates an example of a resource configuration that supports techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the present disclosure. [Figure 4] FIG. 1 illustrates an example of a wireless communication system that supports techniques for control channel repetition for cross-carrier scheduling, according to aspects of the present disclosure. [Diagram 5] FIG. 1 illustrates an example of a resource configuration that supports techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the present disclosure. [Figure 6] FIG. 1 illustrates an example of a resource configuration that supports techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the present disclosure. [Figure 7] FIG. 1 illustrates an example of a resource configuration that supports techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the present disclosure. [Figure 8] FIG. 1 illustrates an example of a process flow supporting techniques for control channel repetition for cross-carrier scheduling, according to aspects of the disclosure. [Figure 9] 1 is a block diagram of a device that supports techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 10] 1 is a block diagram of a device that supports techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 11] FIG. 13 is a block diagram of a communications manager supporting techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 12] FIG. 1 is a diagram of a system including devices that support techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 13] 1 is a block diagram of a device that supports techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 14] 1 is a block diagram of a device that supports techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 15] FIG. 13 is a block diagram of a communications manager supporting techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 16] FIG. 1 is a diagram of a system including devices that support techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 17] 1 is a flowchart illustrating a method for supporting techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 18] 1 is a flowchart illustrating a method for supporting techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 19] 1 is a flowchart illustrating a method for supporting techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. [Figure 20] 1 is a flowchart illustrating a method for supporting techniques for control channel repetition for cross-carrier scheduling, according to an aspect of the disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0056] 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”). A carrier indicator field (CIF) in the control signaling (e.g., a downlink control information (DCI) message) may indicate whether the control signaling schedules communications within the same or different component carriers. In some cases, a “scheduled component carrier” that is scheduled via control signaling on a “scheduling component carrier” may not be configured with a control resource set (CORESET) and may be configured only with a search space set. Furthermore, in some implementations, search space sets on a scheduling component carrier may be linked together for control channel repetition to improve 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 repetition on a linked search space set of the scheduling component carriers, i.e., some wireless communication systems do not allow communications to be scheduled on a scheduled component carrier via repetition of control messages on a linked search space set of the scheduling component carriers.

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

[0058] For example, the UE may receive a scheduling configuration for cross-carrier scheduling of the scheduled component carrier via control signaling on the scheduling component carrier. The UE may also receive a search space set linking configuration indicating decoding candidates of the search space set of the scheduling component carrier that may be used to schedule communication in the search space set on the scheduled component carrier. In some aspects, decoding candidates in different search spaces that are "linked" for control channel repetitions may be used to communicate multiple repetitions of the same control message (e.g., for cross-carrier or intra-carrier scheduling). The UE may attempt to decode 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 the candidates. The UE may then receive one or more control messages within the decoding candidates of the scheduling component carrier that schedule communication on the scheduled component carrier and may perform the scheduled communication on the scheduled component carrier. A UE that successfully decodes at least one of the linked decoding candidates receives at least one repetition of the control message for cross-carrier or intra-carrier scheduling.

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

[0060] Aspects of the present disclosure are first described in the context of a wireless communication system. Additional aspects of the present disclosure are described in the context of example resource configurations and example process flows. Aspects of the present disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flow charts relating to techniques for control channel repetition for cross-carrier scheduling.

[0061] 1 illustrates an example of a wireless communication system 100 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the 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 enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

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

[0063] The UEs 115 may be distributed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be fixed or mobile or both at different times. The UEs 115 may be devices in different forms or with different capabilities. Some example UEs 115 are shown in FIG. 1. The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, 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 FIG. 1.

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

[0065] One or more of the base stations 105 described herein may include or be referred to as a base transceiver station, radio base station, access point, radio transceiver, Node B, eNodeB (eNB), next generation Node B or giganode B (any of which may be referred to as gNB), Home Node B, Home eNodeB, or other suitable terminology by those skilled in the art.

[0066] The UE 115 may include or be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, and a "device" may also be referred to as a unit, a station, a terminal, or a client, among other examples. The UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, the UE 115 may include or 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, among other examples, which may be implemented in various articles, such as an appliance, or a vehicle, a meter, among other examples.

[0067] The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may act as relays, as shown in FIG. 1, as well as base stations 105 and network equipment, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples.

[0068] The UE 115 and the base station 105 may wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure to support the communication link 125. For example, a carrier used for the communication link 125 may include a portion (e.g., a bandwidth part (BWP)) of a radio frequency spectrum band 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 collection signaling (e.g., synchronization signals, system information), control signaling to coordinate operation on the carrier, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. The UE 115 may be configured with 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) and time division duplexing (TDD) component carriers.

[0069] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have collection or control signaling to coordinate operation with respect to 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 UE 115. A carrier may be operated in a standalone mode, where initial collection and connection may be made by the UE 115 over the carrier, or the carrier may be operated in a non-standalone mode, where connection is anchored using a different carrier (e.g., of the same or different radio access technology).

[0070] The communication links 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. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry downlink and uplink communications (e.g., in TDD mode).

[0071] A carrier may be associated with a particular 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 a particular radio access technology carrier (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). The devices of the wireless communication system 100 (e.g., the base station 105, the UE 115, or both) may have a hardware configuration that supports communication on a particular 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 a UE 115 that supports simultaneous communication via a carrier associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., a sub-band, BWP), or all, of the carrier bandwidth.

[0072] A signal waveform transmitted on a carrier may be composed of multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system 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 the subcarrier spacing 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). Thus, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate of the UE 115 may be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase data rates or data integrity for communications with UE 115.

[0073] One or more numerologies for a carrier may be supported, 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, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communication for the UE 115 may be limited to one or more active BWPs.

[0074] The time interval for the base station 105 or the UE 115 may be, for example, T s =1 / (Δf max N f) seconds, where Δf max may represent the maximum supported subcarrier spacing, and N f may represent the maximum supported discrete Fourier transform (DFT) size. The communication resource time intervals 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 include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into several slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on the subcarrier spacing. Each slot may include several symbol periods (e.g., depending on the length of a cyclic prefix prepended to each symbol period). In some wireless communications systems 100, a slot may be further divided into multiple minislots containing one or more symbols. Excluding the cyclic prefix, each symbol period may include one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the frequency band of operation.

[0076] A subframe, slot, minislot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., among a burst of shortened TTIs (sTTIs)).

[0077] The physical channels may be multiplexed on the carriers according to various techniques. The physical control channels and the physical data channels may be multiplexed on the downlink carriers using, for example, one or more of a time division multiplexing (TDM), a frequency division multiplexing (FDM), or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for the physical control channels may be defined by a number of symbol periods and may span the system bandwidth of the carrier, or a subset of the system bandwidth. One or more control regions (e.g., CORESET) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search the control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates at one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for sending control information to multiple UEs 115 and a UE-specific search space set for sending control information to a specific UE 115.

[0078] In some examples, the base stations 105 may be mobile and thus provide communication coverage to moving geographic coverage areas 110. In some examples, the different geographic coverage areas 110 associated with different technologies may overlap, but 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 a heterogeneous network, for example, where 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 or low-latency communications, or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communications (URLLC) or mission-critical communications. The UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission-critical functions). Ultra-reliable communications may include private or group communications 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 the mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency may be used interchangeably herein.

[0080] In some examples, the UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) protocol or a D2D protocol). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105 or may not be able to receive transmissions from the base station 105 in some examples. In some examples, a group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system in which each UE 115 transmits to every other UE 115 in the group. In some examples, the base station 105 facilitates scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without the involvement of the 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 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) that routes packets or interconnects to external networks. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets may be forwarded through a user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to one or more network operators' IP services 150. The IP services 150 may include access to the Internet, an intranet, IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0082] Some of the network devices, such as the base stations 105, may include subcomponents, such as an access network entity 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 referred to as a radio head, a smart radio head, or a transmission / reception point (TRP). Each access network transmission entity 145 may include one or more antenna panels. In some configurations, 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., the base station 105).

[0083] The wireless communication system 100 may operate using one or more frequency bands, typically within the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The 300 MHz to 3 GHz region is commonly known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately 1 decimeter to 1 meter in length. Although UHF waves may be blocked or redirected by buildings and environmental features, the waves may penetrate structures sufficiently for a macrocell to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmissions using lower frequencies and longer waves in the shortwave (high frequency (HF) or very high frequency (VHF) portions 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 an unlicensed band, such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in the unlicensed radio frequency spectrum band, devices such as the base station 105 and the UE 115 may employ carrier sensing for collision detection and avoidance. In some examples, operation in the unlicensed band may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA). Operation in the unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

[0085] The base station 105 or UE 115 may be equipped with multiple antennas that may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located in one or more antenna arrays or antenna panels that may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located in an antenna assembly such as an antenna tower. In some examples, antennas or antenna arrays associated with the base station 105 may be located in diverse geographic locations. The base station 105 may have an antenna array with several rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panels may support radio frequency beamforming for signals transmitted through the antenna ports.

[0086] A base station 105 or a UE 115 may use MIMO communications to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may be transmitted by a transmitting device via different antennas or different combinations of antennas, for example. Similarly, the multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as 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 referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used in a transmitting or receiving device (e.g., base station 105, UE 115) to shape or steer an antenna beam (e.g., transmit beam, receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated through antenna elements of an antenna array such that some signals propagating in a particular orientation relative to the antenna array are subject to constructive interference, while other signals are subject to destructive interference. Adjustment of signals communicated through antenna elements may include a transmitting or receiving device applying an amplitude offset, a phase offset, or both, to signals carried through an antenna element associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., relative to the antenna array of the transmitting or receiving device, or to some other orientation).

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

[0089] Some signals, such as data signals associated with a particular receiving device, may be transmitted by the base station 105 in a single beam direction (e.g., a direction associated with a receiving device, such as the UE 115). In some examples, the beam direction associated with a transmission along a single beam direction may be determined based on signals transmitted in one or more beam directions. For example, the UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions and may report to the base station 105 an indication of the signal that the UE 115 received with the highest signal quality or possibly an acceptable signal quality.

[0090] In some examples, transmission by a device (e.g., by the base station 105 or the UE 115) 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 the base station 105 to the UE 115). The UE 115 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. The base station 105 may transmit a reference signal (e.g., cell-specific reference signal (CRS), channel state information reference signal (CSI-RS)) that may be precoded or amplifycoded. The UE 115 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 are described with reference to signals transmitted in one or more directions by the base station 105, although the UE 115 may employ similar techniques for transmitting a signal multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal in a single direction (e.g., to transmit data to a receiving device).

[0091] A receiving device (e.g., UE 115) may attempt multiple receiving configurations (e.g., directional listening) when receiving various signals, such as synchronization signals, reference signals, beam selection signals, or other control signals, from the base station 105. For example, the receiving device may attempt multiple receiving directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of the antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of the antenna array, any of which may be referred to as "listening" with 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 receive configuration may be aligned to a beam direction determined based on listening with different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or possibly acceptable signal quality based on listening with multiple beam directions).

[0092] The wireless communication system 100 may be a packet-based network that operates 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 to communicate on logical channels. The Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use error detection, error correction, or both techniques to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may establish, configure, and maintain an RRC connection between the UE 115 and the base station 105 or core network 130, which supports radio bearers for user plane data. In the physical layer, the transport channels may be mapped to physical channels.

[0093] The UE 115 and the base station 105 may support retransmission of data to increase the likelihood of successful reception of the data. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is correctly received on the 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 may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support same-slot HARQ feedback, in which the device may provide HARQ feedback in a particular slot for data received in a previous symbol in that slot. In other cases, the device may provide HARQ feedback in a subsequent slot or according to some other time interval.

[0094] In some aspects, a UE 115 of a wireless communication system 100 may be configured with 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), a UE 115 may be configured with up to five CORESETs in a BWP of a serving cell. A CORESET may be associated with one or more transmission configuration indicator (TCI) states for PDCCH repetitions and may be associated with an amount of resource blocks (RBs) in the frequency domain and an amount of symbols or other TTIs (e.g., an amount of OFDM symbols) in the time domain. Furthermore, each CORESET may be associated with one active TCI state. In some aspects, the CORESET configured in the UE 115 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 a PDCCH demodulation reference signal (DMRS) (e.g., a scrambling identifier), coded bits of DCI content, or any combination thereof.

[0095] In some aspects, the UE 115 may be configured with 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, a search space set may include a set of control channel monitoring occasions. For example, a search space set may include a set of monitoring occasions, where the monitoring occasions occur on a regular or irregular periodicity (e.g., a monitoring occasion every 10 ms). The UE 115 may be configured to blindly decode a signal received at each monitoring occasion to determine whether a CRC passes at each monitoring occasion. Furthermore, the UE 115 may be configured to determine a control channel monitoring occasion associated with a given search space set based on one or more characteristics of the search space set, which may be configured (e.g., pre-configured) at the UE 115, indicated to the UE 115 via the base station 105 (e.g., via RRC signaling), or both. The UE 115 may be configured with one or more different types of search space sets (e.g., searchSpaceType), including UE-specific search space sets, common search space sets, or both. In addition, 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 ) (for example, k s slots), offset for monitoring occasion in slots (o s ) (for example, o s slots) (e.g., monitoringSlotPeriodicityAndOffset), a duration (T s ) (where T s <k s), or any combination thereof.

[0097]

number

[0098] If , the slot

[0099]

number

[0100] and frame η f In some aspects, when monitoring the control channel, the UE 115 may determine the number / amount of PDCCH monitoring occasions (e.g., PDCCH candidates) in a slot.

[0101]

number

[0102] Starting from T s may be configured to monitor control channel candidates (e.g., PDCCH candidates) for a search space set s for the next k consecutive slots s -T s The UE 115 may refrain from monitoring control channel candidates for the search space set s for consecutive slots. The amount of control channel candidates (e.g., PDCCH candidates) may be based on an aggregation level (e.g., number of CCEs) of wireless communications at the UE 115.

[0103] These search space set parameters may be configured (e.g., pre-configured) in the UE 115, indicated to the UE 115 via the 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 in the UE 115, including which CORESET the search space set is associated with, the periodicity of the monitoring occasions of the search space set, the offset of the monitoring occasions, the DCI format for monitoring, the number of PDCCH candidates for a given aggregation level of the search space set, etc.

[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 a search space set configuration. For example, a search space set includes a set of PDCCH candidates, where each PDCCH candidate is associated with a given aggregation level and candidate index. In some aspects, the UE 115 may be configured to monitor PDCCH candidates in the configured search space set. The UE 115 may be configured to blindly decode the PDCCH candidates (e.g., monitoring occasions) in the search space set. If the UE 115 receives a DCI message within the PDCCH candidate, the UE 115 may identify a CRC path for the UE 115 (e.g., successfully decode), and the UE 115 may act according to the received DCI message (e.g., perform communication scheduled by the DCI message).

[0105] In some aspects, the UE 115 may be configured to monitor the control channel according to a control channel monitoring pattern (e.g., PDCCH monitoring pattern) within a slot (e.g., monitoringSymbolsWithinSlot). For example, the PDCCH monitoring pattern within a slot may indicate the first symbol of CORESET within the slot for PDCCH monitoring. For example, in the context of a slot including 14 symbols, the CORESET configured in the UE 115 may be associated with a search space set including three symbols, and the control channel monitoring pattern (e.g., monitoringSymbolsWithinSlot) associated with the search space set may be configured as "01000010001000". In this example, the UE 115 may be configured to determine that there are three monitoring occasions (e.g., PDCCH candidates) within each slot in which the search space set exists. Furthermore, the UE 115 may be configured to determine that the three monitoring occasions start at the second symbol, the seventh symbol, and the eleventh symbol of each respective slot in which the search space set exists.

[0106] In some aspects, 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). PDCCH candidates that are linked with each other may be used to transmit / receive repetitions of the same control message. In other words, PDCCH candidates may be linked with each other for "PDCCH repetition". In the context of 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 or linked with 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 repetition and the second repetition of DCI are the same. In this example, the UE 115 may receive and / or decode only the first repetition of DCI or only the second repetition of DCI. Additionally or alternatively, the UE 115 may receive and / or decode both the first and second repetitions of the DCI by performing a soft combining of the first and second repetitions of the DCI, where the UE may have linking awareness prior to decoding. In some aspects, the associated / linked PDCCH candidates may have the same aggregation level (e.g., the same number of CCEs).

[0107] In some aspects, related PDCCH candidates in different search space sets associated with corresponding CORESETs may be linked (e.g., related) to each other for PDCCH repetition. In some cases, two PDCCH candidates with the same candidate index across two related search space sets may be linked or related. In other cases, PDCCH candidates with the same starting CCE index may be linked. Furthermore, the UE 115 may be configured with a set of linked / related PDCCH candidates that are within the same slot or TTI (e.g., intra-slot PDCCH repetition), a set of linked / related PDCCH candidates that are in different slots (e.g., inter-slot PDCCH repetition), 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 when control signaling transmitted / received on a first component carrier (e.g., scheduling component carrier, scheduling cell) is used to schedule communications (e.g., physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH)) on a different component carrier (e.g., scheduling component carrier, scheduling cell). Conversely, intra-carrier scheduling, or self-scheduling, refers to when 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 aspects, 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 (e.g., PDCCH candidates for self-scheduling, PDCCH candidates for cross-carrier scheduling) for different scheduled component carriers in a monitoring occasion of a search space set may be identified separately based on the number of candidates per aggregation level. The number / amount 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 includes a set of PDCCH candidates with an aggregation level of 2 (e.g., 2 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 search space set may contain PDCCH candidates that are 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 repetition on a linked search space set of scheduling component carriers, i.e., some wireless communication systems do not allow communications to be scheduled on scheduled component carriers via repetition of control messages on a linked search space set of scheduling component carriers.

[0111] Thus, the UEs 115 and base stations 105 of the wireless communication system 100 may support techniques for cross-carrier scheduling using control channel repetition (e.g., PDCCH repetition). 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 for control channel repetition to multiple search space sets on a scheduling component carrier to provide cross-carrier scheduling. Thus, the techniques described herein enable communications to be scheduled on a scheduled component carrier via control channel repetition across the search space sets of the scheduling component carrier.

[0112] For example, the UE 115 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. The UE 115 may also receive a search space set linking configuration indicating decoding candidates of the search space set of the scheduling component carrier that may be used to schedule communication in the search space set on the scheduled component carrier. In some aspects, decoding candidates in different search spaces that are "linked" for control channel repetitions may be used to communicate multiple repetitions of the same control message (e.g., for cross-carrier or intra-carrier scheduling). The UE 115 may then receive one or more control messages in the decoding candidates of the scheduling component carrier that schedule communication on the scheduled component carrier and perform the scheduled communication on the scheduled component carrier.

[0113] In some aspects, decoding 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 decoding candidates for intra-carrier and inter-carrier (e.g., cross-carrier) scheduling. In some cases, decoding candidates on a search space set of a scheduling component carrier may be linked for control channel repetition for both cross-carrier and intra-carrier scheduling. In other cases, decoding candidates on a search space set of a scheduling component carrier may be linked for control channel repetition for intra-carrier scheduling only or for cross-carrier scheduling only. In some implementations, the UE 115 may determine which decoding candidates are linked for control channel repetition based on control signaling from the base station 105, or the standard may define linking / unlinking of decoding candidates for cross-carrier scheduling in different search space sets based on whether the search space set of the configured scheduling component carrier is indicated to be linked / unlinked for control channel repetition.

[0114] The techniques described herein may provide improved cross-carrier scheduling. In particular, the techniques described herein may enable the use of PDCCH repetition in the context of cross-carrier scheduling, thereby allowing 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 repetition in the context of cross-carrier scheduling, the techniques described herein may improve the transmit diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of the control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0115] 2 illustrates an example of a resource configuration 200 that supports techniques for control channel repetition for cross-carrier scheduling in accordance with an aspect of the present disclosure. Aspects of the resource configuration 200 may implement or be implemented by the wireless communication system 100.

[0116] As previously described herein, multiple search space sets 205 may be linked together for control channel repetition (e.g., PDCCH repetition). 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. In particular, monitoring occasions 210 (e.g., monitoring occasions 210-a, 210-b, 210-e, 210-f) associated with the first search space set 205-a may be linked with monitoring occasions 210 (e.g., monitoring occasions 210-c, 210-d, 210-g, 210-h) associated with the second search space set 205-b. In some aspects, related PDCCH candidates in each search space set 205 associated with a corresponding CORESET (e.g., PDCCH candidates within a monitoring occasion 210 of each search space set 205) may be linked (e.g., related) to each other for PDCCH repetition.

[0117] In some cases, two PDCCH candidates with the same candidate index across two associated search space sets 205 may be linked or related. In other cases, PDCCH candidates with the same starting CCE index may be linked. Furthermore, the UE 115 may be configured with sets of linked / related PDCCH candidates that are within the same slot or TTI (e.g., intra-slot PDCCH repetition), in different slots (e.g., inter-slot PDCCH repetition), or both.

[0118] The association (e.g., link) between the search space sets 205 and / or between the PDCCH candidates may be configured (e.g., pre-configured) in the UE 115, signaled by the base station 105 to the UE 115 (e.g., via RRC signaling), or both. For example, the 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., associated) with a second PDCCH candidate in a second search space set 205-b. As another example, the UE 115 may receive an RRC message indicating that the first search space set 205-a is linked (e.g., associated) with the second search space set 205-b for PDCCH repetition. 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. In detail, the first search space set 205-a and the second search space set 205-b may include a first set of PDCCH candidates (first set of monitoring occasions 210) and a second set of PDCCH candidates (second set of monitoring occasions 210), respectively, 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 include the same amount of monitoring occasions / PDCCH candidates (e.g., one-to-one mapping of monitoring occasions). For example, the monitoring occasion 210-a associated with the first search space set 205-a may include the same amount of PDCCH candidates as the monitoring occasion 210-c associated with the second search space set 205-b. Similarly, the monitoring occasions 210-b, 210-e, and 210-f associated with the first search space set may include the same amount of PDCCH candidates as the 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 be configured with the same amount of PDCCH candidates per aggregation level.

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

[0121] 3 illustrates an example of a resource configuration 300 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the present disclosure. Aspects of the resource configuration 300 may implement or be implemented by the wireless communications system 100, the resource configuration 200, or both. The resource configuration 300 illustrates a configuration for intra-carrier and inter-carrier (e.g., cross-carrier) scheduling.

[0122] In some aspects, some wireless communications systems (e.g., wireless communications 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 when 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 a different component carrier (e.g., scheduling component carrier, scheduling cell). Conversely, intra-carrier scheduling, or self-scheduling, refers to when control signaling transmitted / received on a component carrier is used to schedule communications on the same component carrier (e.g., same cell).

[0123] For example, as shown in the resource configuration 300, the scheduling component carrier 305-a may be associated with search space sets 310-a, 310-b, 310-c, 310-d that 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 with the same search space set index (searchSpaceId) in the scheduling component carrier 305-a (e.g., scheduling cell) and the scheduled component carrier 305-b (e.g., scheduled cell) may be associated (e.g., linked) with each other. For example, a first search space set 310-a with a first search space set index (e.g., searchSpaceId=1) on the scheduling component carrier 305-a may be linked to a second search space set 310-e with a first search space set index (e.g., searchSpaceId=1) on the scheduled component carrier 305-b for cross-carrier scheduling. In particular, the search space set 310 in the scheduled component carrier 305-b may be linked to the search space set 310 in the scheduling component carrier 305-a, where the configuration of the search space set 310 in the scheduled component carrier 305-b may be used to determine the number of decoding candidates to be monitored in the scheduling component carrier 305-a.

[0125] Thus, the terms "linked," "linking," and similar terms may be used throughout this disclosure in two different contexts. First, related PDCCH candidates in different search space sets 310 may be said to be "linked" for PDCCH repetition, where multiple repetitions of the same control message may be transmitted / received in the linked PDCCH candidates. Second, 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, where the configuration of the search space set 310 in the scheduled component carrier 305-b may be used to determine the number of decoding candidates to be monitored in the search space set 310 of the scheduling component carrier 305-a.

[0126] In some aspects, cross-carrier scheduling may be performed only if the BWPs associated with the linked search space sets 310 in the scheduling component carrier 305-a and the scheduled component carrier 305-b are both active. In other words, continuing with 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 the downlink BWPs associated with the linked search space sets 310 of the scheduled component carrier 305-b and the scheduling component carrier 305-a are both active.

[0127] For example, the UE 115 may be configured with a first search space set 310-a on the scheduling component carrier 305-a and a second search space set 310-e on the 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, the UE 115 may be configured to perform cross-carrier scheduling (e.g., apply the first search space set 310-a of the scheduling component carrier 305-a for the scheduled component carrier 305-b for cross-carrier scheduling) only if 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 both active. In some cases, the first BWP and the second BWP for the linked search space sets 310-a, 310-e may be the same.

[0128] The search space set 310 of the scheduling component carrier 305-a may additionally or alternatively be configured for intra-carrier scheduling. In particular, 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 intra-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, 315-e may be used to schedule communications on the scheduling component carrier 305-a, while control signaling performed on a second set of control channel candidates 315-b, 315-d may be used to schedule communications on the scheduled component carrier 305-b (e.g., within the search space set 310-e).

[0129] In some aspects, a CIF in a control signaling (e.g., a DCI message) may indicate whether the control signaling schedules a communication within the same component carrier 305 on which the control signaling is transmitted / received or a communication within a different component carrier 305. For example, a DCI with a CIF value of zero (e.g., CIF=0) may indicate that the DCI schedules a communication on the same component carrier 305 on which the DCI is transmitted / received. In this regard, a CIF value of zero 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 a communication on a component carrier 305 different from the component carrier 305 on which the DCI is transmitted / received. In this regard, a non-zero CIF value may indicate cross-carrier scheduling.

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

[0131] CCEs associated with control channel candidates 315 for different scheduled component carriers 305 within a monitoring occasion of a search space set 310 (e.g., a first set of control channel candidates 315-a, 315-c, 315-e for self-scheduling, a second set of control channel candidates 315-b, 315-d for cross-carrier scheduling) may be identified separately based on the amount of candidates per aggregation level. The amount of candidates per aggregation level may be configured in the scheduled component carrier 305-b and monitored in the scheduling component carrier 305-a. For example, a first search space set 310-a may include a monitoring occasion that includes a set of control channel candidates 315 with an aggregation level of two (e.g., two CCEs per 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, 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, 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, the time domain behavior, the monitoring occasion, the DCI format for monitoring, or any combination thereof may be configured in the search space set 310 of the scheduling cell, and the number of candidates per aggregation level may be configured in the search space set 310 of the scheduled cell (e.g., a search space set 310 with the same index).For example, the dashed arrows in FIG. 3 represent the association (linking) of search space sets 310 with the same search space set index in the scheduling cell and the scheduled cell (e.g., the linking between the search space set 310-a of the scheduling component carrier 305-a and the search space set 310-e of the scheduled cell).

[0132] In some aspects, the scheduled component carrier 305-b (e.g., scheduled cell) may not be configured with CORESET, but may be configured with search space set 310 (e.g., search space set 310-e, 310-f, 310-g, 310-h). For the search space set 310 configured in the scheduled component carrier 305-b, fields associated with search space set index (e.g., searchSpaceId) and 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 may not be present or configured, including fields associated with CORESET, fields associated with time domain properties (e.g., periodicity, offset, duration, monitoring symbols per slot), fields associated with DCI format for monitoring, etc. In particular, these fields (except for the field relating to the amount of control channel candidates per aggregation level) may be defined for a search space set 310 (e.g., a search space set with the same index) of the scheduling component carrier 305-a that schedules the respective scheduled component carrier 305-b.

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

[0134] 4 illustrates an example of a wireless communication system 400 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. In some examples, the wireless communication system 400 may implement or be implemented by aspects 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 search space sets across component carriers for control channel repetition and cross-carrier scheduling as described in FIGS. 1-3.

[0135] The wireless communication system 400 may include a base station 105-a and a UE 115-a, which may be examples of the base station 105 and the UE 115 as described with reference to FIG. 1. The UE 115-a may communicate with the base station 105-a using a communication link 405, which may be an example of an NR or LTE link between the UE 115-a and the base station 105-a. In some cases, the communication link 405 between the UE 115-a and the base station 105-a may include an example of an access link (e.g., a Uu link), which may include a bidirectional link that allows for both uplink and downlink communication. For example, the UE 115-a may transmit uplink signals, such as uplink control signals or uplink data signals, to the base station 105-a using the communication link 405, and the base station 105-a may transmit downlink signals, such as downlink control signals or downlink data signals, to the UE 115-a using the communication link 405.

[0136] In some aspects, 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 repetition (e.g., PDCCH repetition). In particular, 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 for control channel repetition to multiple search space sets on a scheduling component carrier to provide cross-carrier scheduling. Thus, the techniques described herein enable communications to be scheduled on a scheduled component carrier via control channel repetition across a search space set of the scheduling component carrier.

[0137] In some aspects, the UE 115-a may receive control signaling (e.g., an RRC message, a DCI message) from the base station 105-a. In some aspects, the control signaling may indicate a set of component carriers (e.g., a cell group) that are configured for cross-carrier scheduling. In particular, the control signaling may indicate a set of component carriers that are configured for cross-carrier scheduling via control channel repetition (e.g., PDCCH repetition).

[0138] For example, the UE 115-a may receive RRC signaling indicating a set of component carriers (e.g., a cell group) including the scheduled component carrier 425 that are configured for cross-carrier scheduling via control channel repetition. As another example, the UE 115-a may receive RRC signaling indicating a set of component carriers including the scheduled component carrier 425 that are configured for cross-carrier scheduling via control channel repetition on the scheduling component carrier 420. In this regard, the RRC signaling may indicate that cross-carrier scheduling via control channel repetition on the specified scheduling component carrier 420 applies to all component carriers within the set of component carriers (e.g., within the cell group). Additionally or alternatively, the control signaling may indicate that the set of component carriers is configured for cross-carrier scheduling via control channel repetition on a given BWP (e.g., downlink BWP) of the scheduling component carrier 420. In other cases, the control signaling may indicate that a search space set within the downlink BWP of the scheduled component carrier 425 is configured for cross-carrier scheduling via control channel repetition.

[0139] In some aspects, the UE 115-a may receive control signaling (e.g., an RRC message, a DCI message) from the base station 105-a that identifies a scheduling configuration 410 for scheduling a communication 440 in the UE 115-a. In some aspects, the scheduling configuration 410 may indicate a first search space set 430 and a second search space set 430 of the scheduling component carrier 420 that may be used to schedule the communication 440 on the scheduled component carrier 425. In this regard, the scheduling configuration 410 may indicate a configuration for cross-carrier scheduling, where the scheduled component carrier 425 may be scheduled via a communication 440 received on the search space set 430 of the scheduling component carrier 420. The scheduling configuration 410 may indicate any amount of search space sets 430 on the scheduling component carrier 420 that may be used to schedule the communication 440 on the scheduled component carrier 425.

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

[0141] In some aspects, 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, a BWP associated with each search space set 430, etc.

[0142] For example, with reference to the search space set linking configuration 415-a shown in FIG. 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 indexes 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 sets 430 of the scheduled component carrier 425 may be associated with the same or different search space set indexes as the search space sets 430 of the scheduling component carrier 420. For example, continuing with reference to the search space set linking configuration 415-a shown in FIG. 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] Thus, the term "linked" may be used throughout this disclosure in two different contexts to refer to PDCCH candidates that are linked for PDCCH repetitions and search space sets 430 that are linked for cross-carrier scheduling (e.g., search space sets 430 of a scheduled component carrier 425 that are used to determine the decoding candidates to be monitored in the scheduling component carrier 420). Thus, the vertical arrows between the search space sets 430 shown in Figure 4 indicate "linking" for PDCCH repetitions, whereas the horizontal arrows between the search space sets 430 on different component carriers 420, 425 shown in Figure 4 indicate "linking" for cross-carrier scheduling.

[0144] In some aspects, the control signaling indicating the scheduling configuration 410 may additionally or alternatively indicate a BWP of the respective search space sets 430 of the scheduling component carrier 420, the scheduled component carrier 425, or both. For example, with reference 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 (e.g., the third search space set 430-c and the fourth search space set 430-d) of the scheduled component carrier 425-a are configured within the second BWP of the scheduled component carrier 425-a. In some aspects, 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] The UE 115-a may receive control signaling (e.g., an RRC message, a DCI message) from the base station 105-a indicating a search space set linking configuration 415 for a set of search space sets 430 of a scheduled component carrier 425. The UE 115-a may receive control signaling indicating the search space set linking configuration 415 based on receiving the control signaling including the scheduling configuration 410. 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, the UE 115-a may be configured (e.g., pre-configured) with the search space set linking configuration 415.

[0146] In some aspects, the UE 115-a, the base station 105-a, or both may identify the search space set linking configuration 415. In some aspects, the UE 115-a and / or the 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, the UE 115-a may identify the search space set linking configuration 415 based on transmitting / receiving control signaling including the scheduling configuration 410. Further, in some cases, the UE 115-a may be configured (e.g., pre-configured) with the search space set linking configuration 415 and thus configured to identify the search space set linking configuration 415 without control signaling from the base station 105-a.

[0147] In some aspects, the search space set linking configuration 415 may indicate whether the search space sets 430 on the scheduled component carrier 425 are linked or unlinked for control channel repetition. That is, the search space set linking configuration 415 may indicate whether the control channel repetition on the search space set 430 of the scheduling component carrier 420 may be used to schedule the communication 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 repetition, the control channel repetition on the scheduling component carrier 420 may be used to schedule the communication 440 on the scheduled component carrier 425 along with the number of PDCCH candidates determined from the two or more search space sets 430 of the scheduled component carrier 425. Conversely, if two or more search space sets 430 on a scheduling component carrier 420 are not linked (e.g., unlinked) due to control channel repetition, the control channel repetition on the scheduling component carrier 420 may not be used to schedule communications 440 over the two or more search space sets 430 of the scheduled component carrier 425. In some aspects, 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 the UE 115-a and thus may be referred to as “dummy” search space sets 430.

[0148] Thus, by identifying the search space set linking configuration 415, the UE 115-a and the base station 105-a may be configured to identify whether the search space sets 430 of the scheduled component carriers 425 are linked or unlinked for control channel repetition. In some aspects, the UE 115-a and / or the base station 105-a may identify whether the search space sets 430 of the scheduled component carriers 425 are linked or unlinked for control channel repetition based on explicit signaling, the scheduling configuration 410, a search space set index associated with the scheduling component carrier 420 and / or the search space sets 430 of the scheduled component carriers 425, an amount of decoding candidates per aggregation level, a predefined rule, or any combination thereof.

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

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

[0151] Conversely, in other implementations, the search space sets 430 of the scheduled component carriers 425 may be linked for control channel repetition even though the search space sets 430 of the scheduling component carrier 420 are not linked for control channel repetition for purposes 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 the 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 repetition even though the search space sets 430-i, 430-j of the scheduling component carrier 420-c are not linked for control channel repetition for purposes of scheduling (e.g., self-scheduling) the scheduling component carrier 420-c.

[0152] Additionally or alternatively, the UE 115-a and / or base station 105-a may identify that the search space sets 430 of the scheduled component carrier 425 are linked for control channel repetition based on the search space sets 430 in the scheduling component carrier 420 and the scheduled component carrier 425 being associated with a common search space set index. For example, the UE 115-a and / or base station 105-a may identify that the search space sets 430 of the scheduled component carrier 425 are linked for control channel repetition based on the search space sets 430 of the scheduled component carrier 425 being associated with search space set indexes that are the same as the search space set indexes for the search space sets 430 of the scheduling component carrier 420, respectively. For example, with reference 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 first and second search space set indexes, respectively. In this example, the UE 115-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 associated with the first and second search space set indexes, respectively, and may determine that the third search space set 430-c and the fourth search space set 430-d are linked for control channel repetition.

[0153] In some aspects, the UE 115-a and / or the base station 105-a may determine whether the search space sets 430 of the scheduled component carrier 425 are linked or unlinked for control channel repetition based on the amount of decoding candidates per aggregation level in the respective search space sets 430. For example, with reference to the first search space set linking configuration 415-a, the UE 115-a and / or the 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 repetition based on the third search space set 430-c and the fourth search space set 430-d being configured with the same amount of decoding candidates per aggregation level. In other words, the third search space set 430-c and the fourth search space set 430-d may be linked for PDCCH repetition based on each search space set having a one-to-one mapping of decoding candidates within each aggregation level.

[0154] In some aspects, the UE 115-a, the base station 105-a, or both may identify a set 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 described herein, the search space set 430 of the scheduling component carrier 420 may include decoding candidates that are allocated for cross-carrier scheduling, intra-carrier scheduling, or both. In this regard, the UE 115-a and / or the 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. The UE 115-a and / or the base station 105-a may identify a set of decoding candidates that are 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] Further, the UE 115-a, the base station 105-a, or both may identify decoding candidates (e.g., sets or pairs of decoding candidates) within a search space set 430 of a scheduling component carrier 420 that are linked (or not linked) for control channel repetition. In particular, if the scheduling configuration 410 indicates a first and second search space set 430 of a scheduling component carrier 420 that are configured for cross-carrier scheduling (e.g., search space sets 430-a, 430-b of a scheduling component carrier 420-a), the UE 115-a and / or the 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 repetition. The UE 115-a, the base station 105-a, or both may identify sets or pairs of decoding candidates that are linked for control channel repetition based on the scheduling configuration 410, the search space set linking configuration 415, or both.

[0156] Additionally or alternatively, the UE 115-a and / or base station 105-a may identify decoding candidates (e.g., sets or pairs of decoding candidates) to be linked for control channel repetition based on one or more parameters associated with the respective decoding candidates and / or search space sets 430, including the decoding candidates' CIF values, candidate indexes, aggregation levels, etc. In particular, the UE 115-a and / or base station 105-a may determine that sets / pairs of decoding candidates are linked or not linked for cross-carrier scheduling and / or intra-carrier scheduling.

[0157] For example, referring to the first search space set linking configuration 415-a, the UE 115-a may determine that a pair 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 (e.g., a pair of decoding candidates including a first and a second decoding candidate in the first search space set 430-a and the second search space set 430-b, 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, to be linked for control channel repetition. For example, in two linked monitoring occasions of the search space sets 430-a, 430-b of the scheduling component carrier 420-a, each two PDCCH candidates corresponding to the same CIF value, the same candidate index, and the same AL (corresponding to the same scheduled cell) are linked together for PDCCH repetition.

[0158] Conversely, the UE 115-a may determine that a pair of decoding candidates is not linked for control channel repetition based on the pair of decoding candidates in the first and second search space sets 430 of the scheduling component carrier 420 corresponding to different CIF values ​​(e.g., scheduling different component carriers 420), different candidate indices, different aggregation levels, or any combination thereof. For example, with reference to the second search space set linking configuration 415-b, the UE 115-a may determine that a pair of decoding candidates is not linked for control channel repetition based on the pair 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 corresponding to different CIF values ​​(e.g., scheduling different component carriers 420), different candidate indices, different aggregation levels, or any combination thereof.

[0159] In some aspects, the 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 and cross-carrier scheduling. In other cases, the 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 cases, the 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 is described in further detail herein with respect to Figures 5-7.

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

[0161] For example, the scheduling configuration 410 may indicate a first search space set 430-a and a second search space set 430-b of the scheduling component carrier 420-a to be configured for cross-carrier scheduling. In addition, the 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 the scheduled component carrier 425-a are linked for control channel repetition (e.g., may be scheduled via PDCCH repetition via the first search space set 430-a and the second search space set 430-b). In this example, the control signaling may indicate that a 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, and a 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 first and second BWPs in the scheduling component carrier 420-a and the scheduled component carrier 425-a being both active, cross-carrier scheduling of the scheduled component carrier 425-a may be performed via PDCCH repetitions on the scheduling component carrier 420-a.

[0162] In some aspects, the UE 115-a may monitor decoding candidates within a search space set 430 of a scheduling component carrier 420. In particular, the UE 115-a may monitor decoding candidates within a search space set 430 of a scheduling component carrier 420 for one or more iterations of a control message 435 that schedules communication 440 on a scheduled component carrier 425 based on a scheduling configuration 410 and / or a search space set linking configuration 415. In this regard, the UE 115-a may monitor decoding candidates based on (e.g., in accordance with) the scheduling configuration 410, the search space set linking configuration 415, or both.

[0163] Additionally or alternatively, the UE 115-a may monitor decoding candidates in the search space set 430 of the scheduling component carrier 420 based on determining that the decoding candidates are linked (or not linked) for cross-carrier and / or intra-carrier scheduling, based on determining that the search space sets 430 of the scheduling component carrier 420 and the scheduled component carrier 425 are linked or not linked for control channel repetition, based on the BWP of each search space set 430 being active in both the scheduling component carrier 420 and the scheduled component carrier 425, or any combination thereof.

[0164] For example, with reference 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 repetition, may include first and second decoding candidates, respectively, which are linked for cross-carrier scheduling and control message 435 repetition. In this example, the UE 115-a may monitor the first and second decoding candidates for one or more repetitions of a control message 435 (e.g., one or more repetitions of the same control message 435) that schedules communication 440 on the scheduled component carrier 425-a. 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 repetition, may include first and second decoding candidates, respectively. In this example, the UE 115-a may monitor a first decoding candidate for a first control message 435 and a second decoding candidate for a second control message 435 that is different from the first decoding candidate based on the first and second search space sets 430 being unlinked for control channel repetition.

[0165] In some aspects, the UE 115-a may receive a first control message 435-a (e.g., a first iteration of a control message 435-a) from the base station 105-a. In some aspects, the control message 435-a may schedule communication 440 between the UE 115-a and the base station 105-a on the scheduled component carrier 425. The communication 440 scheduled by the control message 435-a may include a PDSCH transmission, a PUSCH transmission, or both. Thus, the 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. The control message 435-a may include a DCI message (e.g., DCI formats 0_1, 0_2, 1_1, and / or 1_2).

[0166] In some aspects, the UE 115-a may receive the first control message 435-a (e.g., the first iteration 435-a of the control message) within a decoding candidate of a search space set 430 associated with the scheduling component carrier 420. Additionally, the UE 115-a may receive the first iteration 435-a of the control message within a first decoding candidate of a first search space set 430 (e.g., the first search space set 430-a) that is linked to a second decoding candidate of a second search space set 430 (e.g., the second search space set 430-b) that is linked or not to the first search space set 430 for the control channel iteration. In this regard, the UE 115-a may receive the first iteration 435-a of the control message based on (e.g., in accordance with) the scheduling configuration 410 and / or the search space set linking configuration 415.

[0167] In some implementations, the UE 115-a may receive a second control message 435-b (e.g., a second iteration of a control message 435-b) from the base station 105-a. In some aspects, the second control message 435-b may schedule communications 440 (e.g., PDSCH / SPS release, PDSCH / configured grant release) between the UE 115-a and the base station 105-a on the first component carrier (e.g., the scheduled component carrier 425). The control message 435-b may include a DCI message (e.g., DCI formats 0_1, 0_2, 1_1, and / or 1_2).

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

[0169] In some aspects, the UE 115-a may receive the second control message 435-b (e.g., the second iteration 435-b of the control message) within a decoding candidate of a search space set 430 associated with the scheduling component carrier 420. Additionally, the UE 115-a may receive the second iteration 435-b of the control message within a second decoding candidate of a second search space set 430 (e.g., search space set 430-b) that is linked to a first decoding candidate of the first search space set 430 (e.g., the first search space set 430-a) that is linked or not to the first search space set 430 for the control channel iteration. In this regard, the UE 115-a may receive the second iteration 435-b of the control message based on (e.g., in accordance with) the scheduling configuration 410 and / or the search space set linking configuration 415.

[0170] In some cases, the UE 115-a may receive both the first iteration of the control message 435-a and the second iteration of the control message 435-b. In other cases, the UE 115-a may receive only one of the first iteration of the control message 435-a or the second iteration of the control message 435-b. If the UE 115-a receives only the first or second iteration of the control message 435, the UE 115-a may demodulate / decode the single received iteration of the control message 435. In other cases, where the UE 115-a receives both the first iteration of the control message 435-a and the second iteration of the control message 435-b, the UE 115-a may demodulate / decode only one of the first or second iteration of the control message 435. Additionally or alternatively, the UE 115-a may combine the first iteration of the control message 435-a and the second iteration of the control message 435-b.

[0171] For example, the UE 115-a may perform soft combining of the first iteration 435-a of the control message and the second iteration 435-b of the control message. In some aspects, the UE 115-a may perform soft combining (e.g., perform one or more soft combining procedures) to demodulate / decode the iterations 435-a, 435-b of the control message. In particular, the UE 115-a may perform soft combining of a first signal (e.g., the first iteration 435-a of the control message) received within the first search space set 430 with a second signal (e.g., the second iteration 435-b of the control message) received within the second search space set 430 linked to the first search space set for the control channel iteration.

[0172] The UE 115-a may then perform (e.g., transmit, receive) a scheduled communication 440 by one or more control messages 435-a, 435-b on the scheduled component carrier 425. For example, if the scheduled communication 440 includes a PUSCH transmission, the UE 115-a may transmit a scheduled PUSCH transmission to the base station 105-a on the scheduled component carrier 425. As another example, if the scheduled communication 440 includes a PDSCH transmission, the UE 115-a may receive a scheduled PDSCH transmission from the base station 105-a on the scheduled component carrier 425.

[0173] The techniques described herein may provide improved cross-carrier scheduling. In particular, the techniques described herein may enable the use of PDCCH repetition in the context of cross-carrier scheduling, thereby allowing 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 repetition in the context of cross-carrier scheduling, the techniques described herein may improve the transmit 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] 5 illustrates an example of a resource configuration 500 supporting techniques for control channel repetition for cross-carrier scheduling in accordance with aspects of the present disclosure. Aspects of the resource configuration 500 may implement or be implemented by the wireless communication system 100, the resource configuration 200, the resource configuration 300, the wireless communication system 400, or any combination thereof.

[0175] In some aspects, the UE 115 may receive / identify a scheduling configuration for cross-carrier scheduling indicating a scheduling component carrier 505-a and a scheduled component carrier 505-b. As shown in FIG. 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 aspects, the control signaling received on the scheduling component carrier 505-a may be used to schedule (e.g., cross-carrier scheduling) communications on the scheduled component carrier 505-b.

[0176] In some aspects, 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 decoding candidates per aggregation level.

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

[0178] In some aspects, 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 including decoding 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 repetition 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 decoding candidates, and the second monitoring occasion 515-b may include a second set 520-b of decoding candidates. Each of the monitoring occasions 515 may include a subset 520 of decoding candidates configured for intra-carrier scheduling (e.g., self-scheduling) and a subset of decoding 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 the 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 the scheduled component carrier 505-b. In some aspects, decoding candidates in the set of decoding candidates 520-a, 520-b configured for intra-carrier scheduling may be associated with a first CIF value (e.g., CIF=0), whereas decoding candidates in the set of decoding candidates 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 together for control channel repetition to schedule the scheduled component carrier 505-b. That is, multiple repetitions of the same control message (e.g., the same DCI message) may be transmitted / received in the first search space set 510-a and the second search space set 510-b, where the multiple repetitions of the same control message schedule communication on the scheduled component carrier 505-b.

[0181] In some aspects, the first search space set 510-e (e.g., searchSpaceId 1) and the second search space set 510-f (e.g., searchSpaceId 4) of the scheduled component carrier 505-b (e.g., a dummy search space set 510 on the scheduled component carrier 505-b) may be linked together for control channel repetition based on the first search space set 510-a and the second search space set 510-b of the scheduled component carrier 505-a being linked for control channel repetition. Furthermore, based on the first search space set 510-e and the second search space set 510-f of the scheduled component carrier 505-b being 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 repetition. In other words, based on the fact that search space sets 510 with the same search space set index (e.g., searchSpaceId 1, searchSpaceId 4) are located in 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, and the first search space set 510-e and the second search space set 510-f of the scheduled component carrier may be linked for control channel repetition.

[0182] As shown in the resource configuration 500, the linked monitoring occasions 515-a, 515-b associated with the first search space set 510-a and the second search space set 510-b may include sets (e.g., pairs) of linked decoding candidates corresponding to the same CIF value. Furthermore, the linked monitoring occasions 515-a, 515-b may include sets (e.g., pairs) of linked decoding candidates corresponding to the same candidate index, the same aggregation level, or both. Furthermore, since the first search space set 510-a and the second search space set 510-b are linked to each other due to control channel repetition, the first search space set 510-a and the second search space set 510-b may be configured with the same number of decoding 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 decoding candidates linked for intra-carrier scheduling and the same amount of decoding candidates linked for cross-carrier scheduling.

[0183] In some aspects, the UE 115 may be configured to apply the linked search space set 510-a, 510-b used to schedule the scheduled component carrier 505-b (e.g., monitor decoding candidates corresponding to the scheduled component carrier 505-b) only when a downlink BWP in which the search space set 510-a, 510-b is configured on the scheduling component carrier 505-a is active and a downlink BWP in which the search space set 510-e, 510-f is configured on the scheduled component carrier 505-b is active. That is, the UE 115 may be configured to monitor the first search space set 510-a and the second search space set 510-b of the scheduling component carrier 505-a for controlled scheduling to schedule communications within the first search space set 510-e and the second search space set 510-f of the scheduled component carrier only when a first BWP associated with the first search space set 510-a and the second search space set 510-b of the scheduling component carrier 505-a is active and when a second BWP associated with the first search space set 510-e and the second search space set 510-f of the scheduled component carrier 505-b is active.

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

[0185] 6 illustrates an example of a resource configuration 600 supporting techniques for control channel repetition for cross-carrier scheduling in accordance with aspects of the present disclosure. Aspects of the resource configuration 600 may implement or be implemented by the wireless communications system 100, the resource configuration 200, the resource configuration 300, the wireless communications system 400, or any combination thereof.

[0186] In some aspects, the UE 115 may receive / identify a scheduling configuration for cross-carrier scheduling indicating a scheduling component carrier 605-a and a scheduled component carrier 605-b. As shown in FIG. 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 aspects, the control signaling received on the scheduling component carrier 605-a may be used to schedule (e.g., cross-carrier scheduling) communications on the scheduled component carrier 605-b.

[0187] In some aspects, 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 UE 115 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 decoding candidates per aggregation level.

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

[0189] In some aspects, 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 including decoding 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 repetition 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 decoding candidates, and the second monitoring occasion 615-b may include a second set 620-b of decoding candidates. Each of the monitoring occasions 615 may include a subset 620 of decoding candidates configured for intra-carrier scheduling (e.g., self-scheduling) and a subset of decoding 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 the scheduled 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 the scheduled component carrier 605-b. In some aspects, decoding candidates in the set of decoding candidates 620-a, 620-b configured for intra-carrier scheduling may be associated with a first CIF value (e.g., CIF=0), whereas decoding candidates in the set of decoding candidates 620-a, 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 together for control channel repetition to schedule the scheduled component carrier 605-b, i.e., multiple repetitions of the same control message (e.g., the same DCI message) may be transmitted / received in the first search space set 610-a and the second search space set 610-b, where the multiple repetitions of the same control message schedule communication on the scheduled component carrier 605-b.

[0192] In some aspects, the first search space set 610-e (e.g., searchSpaceId 1) and the second search space set 610-f (e.g., searchSpaceId 4) of the scheduled component carrier 605-b (e.g., a dummy search space set 610 on the scheduled component carrier 605-b) may not be linked to each other (e.g., may not be linked) for control channel repetition 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 repetition. In some cases, based on the first search space set 610-a and the second search space set 610-b of the scheduling component carrier 605-a being linked for control channel repetition, 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 repetition.

[0193] In such a case, decoding candidates configured for intra-carrier scheduling (e.g., CIF=0) within monitoring occasions 615-a, 615-b of linked search space sets 610-a, 610-b of a scheduling component carrier 605-a may be linked for control channel repetition. Thus, repetitions of the same control message that schedules communication on the scheduling component carrier 605-a may be transmitted / received within linked decoding candidates of the first monitoring occasion 615-a and the second monitoring occasion 615-b. In particular, based on the sets of decoding candidates within the first monitoring occasion 615-a and the second monitoring occasion 615-b being associated with the same CIF value, the same candidate index, and the same aggregation level, the sets of decoding candidates may be linked for control channel repetition for self-scheduling. Thus, a first monitoring occasion 615-a and a second monitoring occasion 615-b associated with a first search space set 610-a and a second search space set 610-b may include the same number of decoding candidates configured for self-scheduling.

[0194] In comparison, decoding candidates configured for cross-carrier scheduling (e.g., CIF=1) in the monitoring occasions 615-a, 615-b of the linked search space sets 610-a, 610-b may not be linked due to control channel repetition. In other words, multiple repetitions of the same control message that schedules communication on the scheduled component carrier 605-b may not be transmitted / received in the unlinked decoding candidates configured for cross-carrier scheduling. Thus, the UE 115 may be configured to individually monitor the decoding candidates configured for cross-carrier scheduling (e.g., monitor each decoding candidate for an individual, separate control message that schedules communication on the scheduled component carrier 605-b).

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

[0196] 7 illustrates an example of a resource configuration 700 supporting techniques for control channel repetition for cross-carrier scheduling in accordance with aspects of the present disclosure. Aspects of the resource configuration 700 may implement or be implemented by the wireless communication system 100, the resource configuration 200, the resource configuration 300, the wireless communication system 400, or any combination thereof.

[0197] In some aspects, the UE 115 may receive / identify a scheduling configuration for cross-carrier scheduling indicating a scheduling component carrier 705-a and a scheduled component carrier 705-b. As shown in FIG. 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 aspects, the control signaling received on the scheduling component carrier 705-a may be used to schedule (e.g., cross-carrier scheduling) communications on the scheduled component carrier 705-b.

[0198] In some aspects, 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 decoding candidates per aggregation level.

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

[0200] In some aspects, 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 including decoding 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 decoding candidates, and the second monitoring occasion 715-b may include a second set 720-b of decoding candidates. Each of the monitoring occasions 715 may include a subset 720 of decoding candidates configured for intra-carrier scheduling (e.g., self-scheduling) and a subset of decoding 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 the 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 the scheduled component carrier 705-b. In some aspects, decoding candidates in the set of decoding candidates 720-a, 720-b configured for intra-carrier scheduling may be associated with a first CIF value (e.g., CIF=0), whereas decoding candidates in the set of decoding candidates 720-a, 720-b configured for cross-carrier scheduling may be associated with a second CIF value (e.g., CIF=1).

[0202] In some aspects, 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 together for control channel repetition, i.e., multiple repetitions 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 aspects, 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 (e.g., may not be linked) for control channel repetition, 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 repetition.

[0204] In such a case, the decoding candidates configured for intra-carrier scheduling (e.g., CIF=0) in the monitoring occasions 715-a, 715-b of the linked search space sets 710-a, 710-b of the scheduling component carrier 705-a may not be linked for control channel repetition. Thus, repetitions of the same control message that schedules communication on the scheduling component carrier 705-a cannot be transmitted / received in the unlinked decoding candidates of the first monitoring occasion 715-a and the second monitoring occasion 715-b. Thus, the UE 115 may be configured to individually monitor the unlinked decoding candidates configured for self-scheduling. Furthermore, because the decoding candidates configured for self-scheduling are not linked, the first monitoring occasions 715-a and the second monitoring occasions 715-b associated with the first search space sets 710-a and the second search space sets 710-b may include different numbers of decoding candidates configured for self-scheduling, as shown in FIG. 7.

[0205] In comparison, decoding candidates configured for cross-carrier scheduling (e.g., CIF=1) in monitoring occasions 715-a, 715-b of linked search space sets 710-a, 710-b may be linked for control channel repetition. In other words, multiple repetitions of the same control message that schedules communication on the scheduled component carrier 705-b may be transmitted / received in linked decoding candidates configured for cross-carrier scheduling. In particular, based on the sets of decoding candidates in the first monitoring occasion 715-a and the second monitoring occasion 715-b being associated with the same CIF value, the same candidate index, and the same aggregation level, the sets of decoding candidates may be linked for control channel repetition for cross-carrier scheduling.

[0206] Thus, the UE 115 may expect that the first search space set 710-a and the second search space set 710-b in the scheduled component carrier 705-a are configured with the same DCI format for monitoring, the same periodicity, the same slot offset (e.g., for intra-slot repetition), and the same number of monitoring occasions per slot. Furthermore, the UE 115 may be configured to monitor linked decoding candidates configured for cross-carrier scheduling for repetitions of the same control message (e.g., DCI message) that schedules communication 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 decoding candidates configured for cross-carrier scheduling within the monitoring occasions 715-a, 715-b are linked for control channel repetition, the first search space set 710-a and the second search space set 710-b of the scheduling component carrier 705-a may be configured with the same number of decoding candidates configured for cross-carrier scheduling per aggregation level. For example, as shown in the resource configuration 700, the first monitoring occasion 715-a and the second monitoring occasion 715-b may include the same number of decoding candidates configured for cross-carrier scheduling (e.g., a one-to-one mapping of cross-carrier decoding candidates).

[0208] 8 illustrates an example of a process flow 800 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. In some examples, the process flow 800 may implement or be implemented by aspects of the wireless communications system 100, the resource configuration 200, the resource configuration 300, the wireless communications system 400, the resource configuration 500, the resource configuration 600, the resource configuration 700, or any combination thereof. For example, the process flow 800 may illustrate the UE 115-b receiving a scheduling configuration for cross-carrier scheduling of a first component carrier, receiving at least one repetition of a control message in accordance with the scheduling configuration, and performing a scheduled communication by the at least one repetition of the control message on the first component carrier, as described with reference to FIGS. 1-7.

[0209] In some cases, the process flow 800 may include a UE 115-b and a base station 105-b, which may be examples of corresponding devices described herein. In particular, the UE 115-b and the base station 105-b shown in FIG. 8 may include examples of the UE 115-a and the base station 105-a shown in FIG.

[0210] In some examples, the operations illustrated in process flow 800 may be performed by hardware (e.g., circuits, processing blocks, logic components, and other components), code executed by a processor (e.g., software), or any combination thereof. Alternative examples below 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] At 805, the UE 115-b may receive control signaling (e.g., an RRC message, a DCI message) from the base station 105-b. In some aspects, the control signaling may indicate a set of component carriers (e.g., a cell group) configured for cross-carrier scheduling. In particular, the control signaling may indicate a set of component carriers configured for cross-carrier scheduling via control channel repetition (e.g., PDCCH repetition).

[0212] For example, the UE 115-b may receive RRC signaling indicating a set of component carriers (e.g., a cell group) including a scheduled component carrier that is configured for cross-carrier scheduling via control channel repetition. As another example, the UE 115-b may receive RRC signaling indicating a set of component carriers including a scheduled component carrier that is configured for cross-carrier scheduling via control channel repetition on a scheduling component carrier. In this regard, the RRC signaling may indicate that cross-carrier scheduling via control channel repetition 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 control channel repetition on a given BWP (e.g., a downlink BWP) of the scheduling component carrier. In other cases, the control signaling may indicate that a search space set within the downlink BWP of the scheduled component carrier is configured for cross-carrier scheduling via control channel repetition.

[0213] At 810, the UE 115-b may receive control signaling (e.g., an RRC message, a DCI message) from the base station 105-b that identifies a scheduling configuration for scheduling communications at the UE 115-b. In some aspects, the scheduling configuration may indicate a first search space set and a second set of scheduling component carriers that are usable for scheduling communications on the scheduled component carriers. In this regard, the scheduling configuration may indicate a configuration for cross-carrier scheduling, where the scheduled component carriers may be scheduled via communications received on a search space set of the scheduling component carriers. The scheduling configuration may indicate any amount of search space sets on the scheduling component carriers that may be used for scheduling communications on the scheduled component carriers.

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

[0215] The UE 115-b may receive control signaling at 810 indicating the scheduling configuration based on receiving the control signaling at 805. 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). Further, in some cases, the UE 115-b may be configured (e.g., pre-configured) with the scheduling configuration and thus configured to identify the scheduling configuration without control signaling from the base station 105-b.

[0216] In some aspects, the control signaling at 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 set on the scheduling component carrier and / or scheduled component carrier, a BWP associated with the respective search space set, etc.

[0217] For example, the control signaling at 810 may indicate 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. As another example, the control signaling including the scheduling configuration may indicate search space set indexes associated with the third and fourth search space sets 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 index as the search space sets of the scheduling component carrier. For example, continuing with 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 aspects, the control signaling indicating the scheduling configuration may additionally or alternatively indicate a BWP of a respective search space set of the scheduling component carrier, the scheduled component carrier, or both. For example, the control signaling may indicate that a first search space set and a second search space set of the scheduling component carrier are configured within a first BWP of the scheduling component carrier. Similarly, the control signaling may indicate that at least two search space sets (e.g., a third search space set and a fourth search space set) of the scheduled component carrier are configured within a second BWP of the scheduled component carrier. In some aspects, the first BWP of the scheduling component carrier and the second BWP of the scheduled component carrier may be different.

[0219] At 815, the UE 115-b may receive control signaling (e.g., an RRC message, a DCI message) from the base station 105-b indicating a search space set linking configuration for a set of search space sets of scheduled component carriers. The UE 115-b may receive control signaling indicating a search space set linking configuration at 815 based on receiving the control signaling at 805, the control signaling including the scheduling configuration at 810, or both. 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, the UE 115-b may be configured (e.g., pre-configured) with a search space set linking configuration.

[0220] At 820, the UE 115-b, the base station 105-b, or both may identify a search space set linking configuration. In some aspects, the UE 115-b and / or the base station 105-b may identify a search space set linking configuration based on sending / receiving control signaling indicating the search space set linking configuration at 815. Additionally or alternatively, the UE 115-b may identify a search space set linking configuration at 820 based on sending / receiving control signaling at 805, sending / receiving control signaling at 810, or both. Further, in some cases, the UE 115-b may be configured (e.g., pre-configured) with a search space set linking configuration and thus configured to identify a search space set linking configuration without control signaling from the base station 105-b.

[0221] In some aspects, the search space set linking configuration may indicate whether the search space sets on the scheduled component carrier are linked or unlinked for control channel repetition. That is, the search space set linking configuration may indicate whether the control channel repetition on the search space set of the scheduling component carrier may be used to schedule communications within the search space set of the scheduled component carrier. If two or more search space sets on the scheduled component carrier are linked for control channel repetition, the control channel repetition on the scheduling component carrier may 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 the scheduled component carrier are not linked (e.g., unlinked) for control channel repetition, the control channel repetition 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 aspects, due to the fact that the scheduled component carrier is scheduled via control signaling on the scheduling component carrier, the search space set of the scheduled component carrier may not actually be monitored by the UE 115-b and may therefore be referred to as a “dummy” search space set.

[0222] Thus, by identifying the search space set linking configuration, the UE 115-b and the base station 105-b may be configured to identify whether the search space sets of the scheduled component carriers are linked or unlinked for control channel repetition. In some aspects, the UE 115-b and / or the base station 105-b may identify whether the search space sets of the scheduled component carriers are linked or unlinked for control channel repetition based on explicit signaling, a scheduling configuration, a search space set index associated with the scheduling component carrier and / or the search space set of the scheduled component carrier, an amount of decoding candidates per aggregation level, a predefined rule, or any combination thereof.

[0223] For example, in some cases, the UE 115-b and / or the base station 105-b may identify that two or more search space sets of the scheduled component carrier are linked for control channel repetition 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 repetition. In other words, based on that a search space set of the scheduling component carrier is linked (or not linked) for PDCCH repetition, a search space set of the scheduled component carrier may be linked (or not linked) for PDCCH repetition. In other implementations, a search space set of the scheduled component carrier may not be linked for control channel repetition even though a search space set of the scheduling component carrier is linked for control channel repetition. In such a case, the UE 115-b and / or the 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 repetition despite a scheduling configuration indicating that a first and a second search space set of the scheduling component carrier are linked for control channel repetition.

[0224] Additionally or alternatively, the UE 115-b and / or the base station 105-b may identify that the search space sets of the scheduled component carrier are linked for control channel repetition based on the search space sets in the scheduling component carrier and the scheduled component carrier being associated with a common search space set index. For example, the UE 115-b and / or the base station 105-b may identify that the two or more search space sets of the scheduled component carrier are linked for control channel repetition based on the two or more search space sets of the scheduled component carrier being associated with search space set indexes that are the same as the search space set indexes for the search space sets of the scheduling component carrier, respectively. For example, the first and second search space sets of the scheduling component carrier may be associated with first and second search space set indexes, respectively. In this example, the UE 115-b may determine that the third and fourth search space sets of the scheduled component carrier are linked for control channel repetition based on determining that the third and fourth search space sets are associated with the first and second search space set indexes, respectively.

[0225] In some aspects, the UE 115-b and / or the base station 105-b may determine whether the search space sets of the scheduled component carriers are linked or unlinked for control channel repetition based on the amount of decoding candidates per aggregation level in the respective search space sets. For example, the UE 115-b and / or the base station 105-b may identify that the third and fourth search space sets of the scheduled component carriers are linked for control channel repetition based on the third and fourth search space sets of the scheduled component carriers being configured with the same amount of decoding candidates per aggregation level. In other words, the third and fourth search space sets may be linked for PDCCH repetition based on the respective search space sets having a one-to-one mapping of decoding candidates in each aggregation level.

[0226] At 825, the UE 115-b, the base station 105-b, or both may 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. As previously described herein, the search space set of the scheduling component carrier may include decoding candidates that are allocated for cross-carrier scheduling, intra-carrier scheduling, or both. In this regard, at 825, the UE 115-b and / or the 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] The UE 115-b and / or the base station 105-b may identify a set of decoding candidates to be allocated for cross-carrier scheduling of the scheduled component carrier based on the search space set linking configuration, the scheduling configuration, or both. In this regard, the UE 115-b and / or the base station 105-b may identify a set of decoding candidates to be allocated for cross-carrier scheduling at 825 based on sending / receiving control signaling at 805, 810, 815, or any combination thereof.

[0228] At 830, the UE 115-b, the base station 105-b, or both may identify decoding candidates (e.g., sets or pairs of decoding candidates) within a search space set of the scheduling component carrier that is linked (or unlinked) for control channel repetition. In particular, if the scheduling configuration indicates a first and second search space set of the scheduling component carrier that is configured for cross-carrier scheduling, the UE 115-b and / or the base station 105-b may identify decoding candidates within the first and second search space sets that are linked or unlinked for control channel repetition.

[0229] The UE 115-b, the base station 105-b, or both may identify a set or pair of decoding candidates to be linked for control channel repetition based on the scheduling configuration, the search space set linking configuration, or both, at 830. Thus, the UE 115-b and / or the base station 105-b may identify decoding candidates to be linked for control channel repetition 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, the UE 115-b and / or the base station 105-b may identify decoding candidates (e.g., sets or pairs of decoding candidates) to be linked for control channel repetition based on one or more parameters associated with the respective decoding candidates and / or search space sets, including the decoding candidates' CIF values, candidate indexes, aggregation levels, etc. In particular, the UE 115-b and / or the base station 105-b may determine that sets / pairs of decoding candidates are linked or not linked for cross-carrier scheduling and / or intra-carrier scheduling.

[0231] For example, the UE 115-b may determine that a pair of decoding candidates in a first and second search space set of a scheduling component carrier (e.g., a pair of decoding candidates including a first and second decoding candidate in a first and second search space set, respectively) are linked for control channel repetition based on the pair of decoding candidates corresponding 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, the UE 115-b may determine that a pair of decoding candidates in a first and second search space set of a scheduling component carrier are not linked for control channel repetition based on the pair of decoding candidates corresponding to different CIF values ​​(e.g., scheduling different component carriers), different candidate indexes, different aggregation levels, or any combination thereof.

[0232] In some aspects, a set / pair of decoding candidates in the first and second search space sets of a scheduling component carrier may be linked for both intra-carrier and cross-carrier scheduling. In other cases, a set / pair of decoding 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 cases, a set / pair of decoding 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, the UE 115-b may receive control signaling from the base station 105-b indicating an active BWP. In particular, the UE 115-b may receive control signaling indicating an active BWP in each of the scheduling component carrier and the scheduled component carrier. The control signaling used to indicate the active BWP may include a DCI message, a MAC-CE message, or both. The UE 115-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 decoding candidates configured for cross-carrier scheduling at 825, identifying linked / unlinked decoding candidates at 830, or any combination thereof. Additionally or alternatively, the control signaling received at 805, 810, and / or 815 may indicate an active BWP in the scheduling component carrier and the scheduled component carrier.

[0234] As previously described herein, the scheduling configuration may indicate BWPs associated with the scheduling component carrier and the search space sets in the scheduled component carrier. Additionally, the UE 115-b and / or the base station 105-b may be configured to schedule communications on the search space set of the scheduled component carrier via control channel repetition on the search space set of the scheduling component carrier only if the BWPs associated with the search space sets of both the scheduling component carrier and the scheduled component carrier are active. That is, in some implementations, cross-carrier scheduling via control channel repetition may be performed only if the BWPs for the linked search space sets are active in both the scheduling component carrier and the scheduled component carrier.

[0235] For example, the scheduling configuration may indicate a first search space set and a second search space set of the scheduling component carrier that are configured for cross-carrier scheduling. In addition, the search space set linking configuration may indicate that a third search space set and a fourth search space set of the scheduled component carrier are linked for control channel repetition (e.g., may be scheduled via PDCCH repetition via the first and second search space sets). In this example, the control signaling at 835 may indicate that a first BWP associated with the first and second search space sets of the scheduling component carrier is active, and a second BWP associated with the third and fourth search space sets of the scheduled component carrier is active. In this example, based on the first and second BWPs on the scheduling component carrier and the scheduled component carrier being both active, cross-carrier scheduling of the scheduled component carrier may be performed via PDCCH repetition on the scheduling component carrier.

[0236] At 840, the UE 115-b may monitor decoding candidates within a search space set of the scheduling component carrier. In particular, the UE 115-b may monitor decoding candidates within a search space set of the scheduling component carrier for one or more iterations of a control message that schedules communication on the scheduled component carrier based on a scheduling configuration and / or a search space set linking configuration. In this regard, the UE 115-b may monitor decoding candidates based on (e.g., according to) a scheduling configuration, a search space set linking configuration, or both.

[0237] Thus, UE 115-b may monitor 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] Additionally or alternatively, UE 115-b may monitor decoding candidates in a search space set of a scheduling component carrier based on determining that the decoding candidates are linked (or not linked) for cross-carrier and / or intra-carrier scheduling, based on determining that the search space sets of the scheduling component carrier and the scheduled component carrier are linked or not linked for control channel repetition, based on the BWPs of the respective search space sets being active in both the scheduling component carrier and the scheduled component carrier, or any combination thereof.

[0239] For example, the first and second search space sets in the scheduling component carrier that are linked for control channel repetition may include first and second decoding candidates that are linked for cross-carrier scheduling and control message repetition, respectively. In this example, the UE 115-b may monitor the first and second decoding candidates for one or more repetitions of a control message that schedules communication on the scheduled component carrier (e.g., one or more repetitions of the same control message). As another example, the first and second search space sets in the scheduling component carrier that may not be linked for control channel repetition may include the first and second decoding candidates, respectively. In this example, the UE 115-b may monitor a first decoding candidate for a first control message and a second decoding candidate for a second control message that is different from the first decoding candidate, based on the first and second search space sets being not linked for control channel repetition.

[0240] At 845, the UE 115-b may receive a first control message (e.g., a first iteration of a control message) from the base station 105-b. In some aspects, the control message may schedule communication between the UE 115-b and the 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 a configured grant release (e.g., an uplink type 2 configured grant) on the scheduled component carrier. The control message may include a DCI message (e.g., DCI formats 0_1, 0_2, 1_1, and / or 1_2).

[0241] In some aspects, the UE 115-b may receive a first control message (e.g., a first iteration of the control message) within a decoding candidate of a search space set associated with a scheduling component carrier. Additionally, the UE 115-b may receive the first iteration of the control message within a first decoding candidate of a first search space set that is linked to a second decoding candidate of a second search space set that is not linked to the first search space set for the control channel iteration. In this regard, the UE 115-b may receive the first iteration of the control message based on (e.g., in accordance with) a scheduling configuration and / or a search space set linking configuration. Thus, UE 115-b may receive a first iteration of a 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 decoding candidates for cross-carrier scheduling at 825, identifying linked or unlinked decoding candidates at 830, receiving control signaling at 835, monitoring decoding candidates at 840, or any combination thereof.

[0242] At 850, the UE 115-b may receive a second control message (e.g., a second iteration of a control message) from the base station 105-b. In some aspects, the second control message may schedule communication (e.g., PDSCH / SPS release, PDSCH / configured grant release) between the UE 115-b and the base station 105-b on the first component carrier (e.g., a scheduled component carrier). The control message may include a DCI message (e.g., DCI formats 0_1, 0_2, 1_1, and / or 1_2).

[0243] Based on whether the search space set and decoding candidates of the scheduling component carrier are linked or not linked for control channel repetition, the control messages received at 845 and 850 may include the same or different payloads. For example, if the search space set of the scheduling component carrier is linked for control channel repetition, the second iteration of the control message received at 850 may include the same data payload and schedule the same communication compared to the 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 repetition, the second iteration of the control message received at 850 may include a different data payload and schedule a different communication compared to the first iteration of the control message received at 845.

[0244] In some aspects, the UE 115-b may receive a second control message (e.g., a second repetition of the control message) within a decoding candidate of a search space set associated with the scheduling component carrier. Additionally, the UE 115-b may receive the second repetition of the control message within a second decoding candidate of a second search space set that is linked to the first decoding candidate of the first search space set that is not linked to the first search space set for the control channel repetition. In this regard, the UE 115-b may receive the second repetition of the control message based on (e.g., in accordance with) a scheduling configuration and / or a search space set linking configuration. Thus, UE 115-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 decoding candidates for cross-carrier scheduling at 825, identifying linked or unlinked decoding candidates at 830, receiving control signaling at 835, monitoring decoding candidates at 840, receiving the first control message at 845, or any combination thereof.

[0245] In some cases, the UE 115-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, the UE 115-b may receive only one of the first or second iteration of the control message. If the UE 115-b receives only the first or second iteration of the control message, the UE 115-b may demodulate / decode the single received iteration of the control message. In other cases where the UE 115-b receives both the first and second iterations of the control message, the UE 115-b may demodulate / decode only one of the first or second iteration of the control message. Additionally or alternatively, the UE 115-b may combine the first and second iterations of the control message as described at 855 of process flow 800.

[0246] At 855, the UE 115-b may perform soft combining of the first and second iterations of the control message received at 845 and 850. In some aspects, the UE 115-b may perform soft combining (e.g., perform one or more soft combining procedures) to demodulate / decode the iterations of the control message. In particular, the UE 115-b may perform soft combining of the first signal received at 845 (e.g., the first iteration of the control message) with the second signal received at 850 (e.g., the second iteration of the control message).

[0247] At 860, the UE 115-b may perform (e.g., transmit, receive) a scheduled communication via one or more control messages on the scheduled component carrier. For example, if the scheduled communication includes a PUSCH transmission, the UE 115-b may transmit a scheduled PUSCH transmission to the base station 105-b at 860 on the scheduled component carrier. As another example, if the scheduled communication includes a PDSCH transmission, the UE 115-b may receive a scheduled PDSCH transmission from the base station 105-b at 860 on the scheduled component carrier.

[0248] The UE 115-b and the base station 105-b may perform scheduled communication at 860 based on receiving control signaling at 805, 810, and / or 815, identifying a search space set linking configuration at 820, identifying decoding candidates for cross-carrier scheduling at 825, identifying linked or unlinked decoding candidates at 830, receiving control signaling at 835, monitoring decoding candidates at 840, receiving control messages at 845 and / or 850, performing soft combining at 855, or any combination thereof.

[0249] The techniques described herein may provide improved cross-carrier scheduling. In particular, the techniques described herein may enable the use of PDCCH repetition in the context of cross-carrier scheduling, thereby allowing 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 repetition in the context of cross-carrier scheduling, the techniques described herein may improve the transmit diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of the control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0250] 9 illustrates a block diagram 900 of a device 905 supporting techniques for control channel repetition for cross-carrier scheduling according to an aspect of the disclosure. The device 905 may be an example of an aspect of a UE 115 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communications manager 920. The device 905 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

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

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

[0253] The communications manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be examples of means for performing various aspects of techniques for control channel repetition for cross-carrier scheduling as described herein. For example, the communications manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may support a method 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 (e.g., 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 gate or transistor logic, discrete hardware components, or any combination thereof configured as or in some cases supporting means for performing the functions described in this disclosure. In some examples, the processor, and a memory coupled to the processor, may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory).

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

[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, send information to the transmitter 915, or be integrated in combination with the receiver 910, the transmitter 915, or both to receive information, transmit information, or perform various other operations described herein.

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

[0258] By including or configuring the communications manager 920 according to examples described herein, the device 905 (e.g., a processor controlling or possibly coupled to the receiver 910, the transmitter 915, the communications manager 920, or a combination thereof) may support techniques for improved cross-carrier scheduling. In particular, the techniques described herein may enable the use of PDCCH repetition 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 repetition in the context of cross-carrier scheduling, the techniques described herein may improve the transmit diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of the control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0259] 10 illustrates a block diagram 1000 of a device 1005 supporting techniques for control channel repetition for cross-carrier scheduling according to an aspect of the disclosure. The device 1005 may be an example of an aspect of a device 905 or a UE 115 as described herein. The device 1005 may include a receiver 1010, a transmitter 1015, and a communications manager 1020. The device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

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

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

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

[0263] The communications manager 1020 may support wireless communications in a UE according to examples disclosed herein. The scheduling configuration manager 1025 may be configured as, or may possibly support, a means for receiving 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 communications on a scheduled component carrier different from the scheduling component carrier. The search space set linking configuration manager 1030 may be configured as, or may possibly support, a 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 decoding candidate manager 1035 may be configured as, or may possibly support, a means for identifying a set of decoding candidates within a first search space set and a second search space set of a scheduling component carrier that are 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 as or may possibly support a means for receiving at least one control message over a scheduling component carrier from a base station and within at least one decoding candidate of a set of decoding candidates, which schedules communication between the base station and the UE over the scheduled component carrier. The base station communications manager 1045 may be configured as or may possibly support a means for transmitting or receiving communication with the base station over the scheduled component carrier based on the at least one control message.

[0264] FIG. 11 illustrates a block diagram 1100 of a communications manager 1120 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. The communications manager 1120 may be an example of aspects of the communications manager 920, the communications manager 1020, or both, as described herein. The communications manager 1120, or various components thereof, may be an example of a means for performing various aspects of techniques for control channel repetition for cross-carrier scheduling, as described herein. For example, the communications manager 1120 may include a scheduling configuration manager 1125, a search space set linking configuration manager 1130, a decoding candidate manager 1135, a control message 1140, a base station communications manager 1145, a control signaling reception manager 1150, a monitoring manager 1155, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

[0265] The communications manager 1120 may support wireless communications in a UE according to examples disclosed herein. The scheduling configuration manager 1125 may be configured as, or may possibly support, a means for receiving 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 communications on a scheduled component carrier different from the scheduling component carrier. The search space set linking configuration manager 1130 may be configured as, or may possibly support, a 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 decoding candidate manager 1135 may be configured as, or may possibly support, a means for identifying a set of decoding candidates within a first search space set and a second search space set of a scheduling component carrier that are 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 as, or may possibly support, a means for receiving at least one control message over a scheduling component carrier from a base station and within at least one decoding candidate of a set of decoding candidates, which schedules communication between the base station and the UE over the scheduled component carrier. The base station communications manager 1145 may be configured as, or may possibly support, a means for transmitting or receiving communication with the base station over the scheduled component carrier based on the at least one control message.

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

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

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

[0269] In some examples, to support identifying a search space set linking configuration, the search space set linking configuration manager 1130 may be configured as, or may possibly support, a means for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are linked for control channel repetition based on at least two search space sets being configured with the same amount of decoding candidates per aggregation level.

[0270] In some examples, at least one decoding candidate of the set of decoding candidates includes a pair of decoding candidates, and the decoding candidate manager 1135 may be configured or may possibly support as a means for identifying that the pair of decoding candidates is 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 may be configured or may possibly support as a means for identifying that the third set of monitoring occasions in the first search space set of the scheduling component carrier and the fourth set of monitoring occasions in the second search space set of the scheduling component carrier are not linked for control channel repetition for intra-carrier scheduling.

[0271] In some examples, to support identifying a search space set linking configuration, the search space set linking configuration manager 1130 may be configured as, or may possibly support, a 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, the monitoring manager 1155 may be configured as or may possibly support a means for monitoring a first decoding candidate of a first search space set for a control message and a second decoding candidate of a second search space set for a second control message different from the control message 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 due to control channel repetition.

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

[0274] In some examples, the scheduling configuration manager 1125 may be configured as, or may otherwise support, a means for receiving control signaling indicating 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. In some examples, to support receiving control signaling identifying a scheduling configuration, the scheduling configuration manager 1125 may be configured as, or may otherwise support, a means for receiving control signaling indicating 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.

[0275] In some examples, a third search space set and a fourth search space set of the set of multiple 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. In some examples, 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 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 identifying a scheduling configuration, the scheduling configuration manager 1125 may be configured as, or may possibly support, a 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 the 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 reception manager 1150 may be configured as or may possibly support a 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 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 as or may possibly support a means for monitoring a first decoding candidate of the first search space set and a second decoding candidate of the second search space set for one or more iterations of the control message based on the first BWP and the second BWP being active.

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

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

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

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

[0282] In some examples, the set of multiple search space sets of the scheduled component carrier includes a third search space set and a fourth search space set. In some examples, 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. In some examples, 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 that is different from the first search space set index.

[0283] FIG. 12 illustrates a diagram of a system 1200 including a device 1205 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. The device 1205 may be an example of or include components of a device 905, a device 1005, or a UE 115 as described herein. The device 1205 may wirelessly communicate with one or more base stations 105, UEs 115, or any combination thereof. The device 1205 may include components for two-way 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, code 1235, and a processor 1240. These components may be in electronic communication or may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1245).

[0284] The I / O controller 1210 may manage input and output signals for the device 1205. The I / O controller 1210 may also manage peripheral devices that are not integrated into the device 1205. In some cases, the I / O controller 1210 may represent a physical connection or port to an external peripheral device. 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, touch screen, or similar device. In some cases, the I / O controller 1210 may be implemented as part of a processor, such as the processor 1240. In some cases, a user may interact with the device 1205 through the I / O controller 1210 or through hardware components controlled by the I / O controller 1210.

[0285] In some cases, the device 1205 may include a single antenna 1225. However, in some other cases, the device 1205 may have two or more antennas 1225 that may be capable of simultaneously transmitting or receiving multiple wireless transmissions. The transceiver 1215 may communicate bidirectionally via one or more antennas 1225, wired links, or wireless links, as described herein. For example, the transceiver 1215 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The 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 the one or more antennas 1225. The transceiver 1215, or the 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 or components thereof, as described herein.

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

[0287] The processor 1240 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, 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 a memory (e.g., memory 1230) to cause the device 1205 to perform various functions (e.g., functions or tasks supporting techniques for control channel repetition for cross-carrier scheduling). For example, the device 1205 or a component of the device 1205 may include the processor 1240 and a memory 1230 coupled to the processor 1240, where the processor 1240 and the memory 1230 are configured to perform various functions described herein.

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

[0289] By including or configuring the communications manager 1220 according to examples described herein, the device 1205 may support techniques for improved cross-carrier scheduling. In particular, the techniques described herein may enable the use of PDCCH repetition in the context of cross-carrier scheduling, thereby allowing 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 repetition in the context of cross-carrier scheduling, the techniques described herein may improve the transmit 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, the 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, the memory 1230, the code 1235, or any combination thereof. For example, the code 1235 may include instructions executable by the processor 1240 to cause the device 1205 to perform various aspects of techniques for control channel repetition for cross-carrier scheduling as described herein, or the processor 1240 and the memory 1230 may be configured to perform or support such operations, as the case may be.

[0291] 13 illustrates a block diagram 1300 of a device 1305 supporting techniques for control channel repetition for cross-carrier scheduling according to an aspect of the disclosure. The device 1305 may be an example of an aspect of a base station 105 as described herein. The device 1305 may include a receiver 1310, a transmitter 1315, and a communications manager 1320. The device 1305 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

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

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

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

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

[0296] Additionally or alternatively, in some examples, the communications manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communications management software or firmware). If implemented in code executed by a processor, the functions of the communications manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof may be performed by a general purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as a means for performing or in some cases supporting 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, send information to the transmitter 1315, or be integrated in combination with the receiver 1310, the transmitter 1315, or both to receive information, transmit information, or perform various other operations described herein.

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

[0299] By including or configuring the communications manager 1320 according to examples described herein, the device 1305 (e.g., a processor controlling or possibly coupled to the receiver 1310, the transmitter 1315, the communications manager 1320, or a combination thereof) may support techniques for improved cross-carrier scheduling. In particular, the techniques described herein may enable the use of PDCCH repetition 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 repetition in the context of cross-carrier scheduling, the techniques described herein may improve the transmit diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of the control signaling used for cross-carrier scheduling, thereby enabling more efficient and widespread use of cross-carrier scheduling.

[0300] 14 illustrates a block diagram 1400 of a device 1405 supporting techniques for control channel repetition for cross-carrier scheduling according to an aspect of the disclosure. The device 1405 may be an example of an aspect of a device 1305 or a base station 105 as described herein. The device 1405 may include a receiver 1410, a transmitter 1415, and a communications manager 1420. The device 1405 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

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

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

[0303] The device 1405 or various components thereof may be an example of a means for performing various aspects of techniques for control channel repetition 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 decoding candidate manager 1435, a control message transmission manager 1440, a UE communications manager 1445, or any combination thereof. The communications manager 1420 may be an example of an aspect of the communications manager 1320 as described herein. In some examples, the communications manager 1420 or various components thereof may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or possibly cooperating with the receiver 1410, the transmitter 1415, or both. For example, the communications manager 1420 may receive information from the receiver 1410, send information to the transmitter 1415, or be integrated in combination with the receiver 1410, the transmitter 1415, or both to receive information, transmit information, or perform various other operations described herein.

[0304] The communications manager 1420 may support wireless communications in a base station according to examples disclosed herein. The scheduling configuration manager 1425 may be configured as, or may possibly support, a means for transmitting 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 1430 may be configured as, or may possibly support, a 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 decoding candidate manager 1435 may be configured as, or may possibly support, a means for identifying a set of decoding candidates within a first search space set and a second search space set of a scheduling component carrier that are 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 as or may possibly support a means for transmitting at least one control message over a scheduling component carrier to the UE and within at least one decoding candidate of the set of decoding candidates, which schedules communication between the base station and the UE over the scheduled component carrier. The UE communications manager 1445 may be configured as or may possibly support a means for transmitting or receiving communications with the UE over the scheduled component carrier based on the at least one control message.

[0305] FIG. 15 illustrates a block diagram 1500 of a communications manager 1520 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. The communications manager 1520 may be an example of aspects of the communications manager 1320, the communications manager 1420, or both, as described herein. The communications manager 1520, or various components thereof, may be an example of a means for performing various aspects of techniques for control channel repetition for cross-carrier scheduling, as described herein. For example, the communications manager 1520 may include a scheduling configuration manager 1525, a search space set linking configuration manager 1530, a decoding candidate manager 1535, a control message transmission manager 1540, a UE communications manager 1545, a control signaling transmission manager 1550, or any combination thereof. Each of these components may communicate with one another directly or indirectly (e.g., via one or more buses).

[0306] The communications manager 1520 may support wireless communications in a base station according to examples disclosed herein. The scheduling configuration manager 1525 may be configured as, or may possibly support, a means for transmitting 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 as, or may possibly support, a 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 decoding candidate manager 1535 may be configured as, or may possibly support, a means for identifying a set of decoding candidates within a first search space set and a second search space set of a scheduling component carrier that are 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 as or may possibly support a means for transmitting at least one control message over the scheduling component carrier to the UE and within at least one decoding candidate of the set of decoding candidates, which schedules communication between the base station and the UE over the scheduled component carrier. The UE communications manager 1545 may be configured as or may possibly support a means for transmitting or receiving communications with the UE over the scheduled component carrier based on the at least one control message.

[0307] In some examples, to support identifying a search space set linking configuration, the search space set linking configuration manager 1530 may be configured as, or may possibly support, a means for transmitting additional control signaling indicating a search space set linking configuration to the UE. In some examples, to support identifying a search space set linking configuration, the search space set linking configuration manager 1530 may be configured as, or may possibly support, a means for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are linked for control channel repetition 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 repetition.

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

[0309] In some examples, to support identifying a search space set linking configuration, the search space set linking configuration manager 1530 may be configured as, or may possibly support, a means for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are linked for control channel repetition based on at least two search space sets being configured with the same amount of decoding candidates per aggregation level.

[0310] In some examples, to support identifying a search space set linking configuration, the search space set linking configuration manager 1530 may be configured as, or may possibly support, a means for identifying that at least two search space sets of a set of multiple search space sets of a scheduled component carrier are linked for control channel repetition based on that each pair of decoding candidates across a first and second search space set for two monitoring occasions are linked for control channel repetition, and that each pair of decoding candidates linked for control channel repetition 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 as, or may possibly support, a 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 repetition for intra-carrier scheduling. In some examples, to support identifying a search space set linking configuration, the search space set linking configuration manager 1530 may be configured as, or may possibly support, a means for identifying that at least two search space sets of a set of a plurality of search space sets of a scheduled component carrier are not linked for control channel repetition.

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

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

[0314] In some examples, the scheduling configuration manager 1525 may be configured as, or may otherwise support, a means for transmitting control signaling indicating 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. In some examples, to support transmitting control signaling identifying a scheduling configuration, the scheduling configuration manager 1525 may be configured as, or may otherwise support, a means for transmitting control signaling indicating 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.

[0315] In some examples, a third search space set and a fourth search space set of the set of multiple 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. In some examples, 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 repetition based on the first search space set and the second search space set being linked for control channel repetition.

[0316] In some examples, to support transmitting control signaling identifying a scheduling configuration, the scheduling configuration manager 1525 may be configured as, or may possibly support, a means for transmitting 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 the 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.

[0317] In some examples, the control signaling transmission manager 1550 may be configured as or may in some cases support a means 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 is active, and that a second BWP associated with a set of multiple search space sets of a scheduled component carrier is active, where transmitting at least one control message is based on the first BWP and the second BWP being active.

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

[0319] In some examples, the control signaling transmission manager 1550 may be configured as or may possibly support a means for transmitting additional control signaling to the UE indicating a set of multiple component carriers, including a scheduled component carrier, that are configured for cross-carrier scheduling via control channel repetition. In some examples, the decoding candidate manager 1535 may be configured as or may possibly support a means for identifying, based on an indication of a set of multiple component carriers, that a first decoding candidate of a first search space set is linked for control channel repetition to a second decoding candidate of a second search space set for cross-carrier scheduling on the scheduled component carrier.

[0320] In some examples, the control signaling transmission manager 1550 may be configured as or may possibly support a means for transmitting additional control signaling to the UE indicating a set of multiple component carriers, including the scheduled component carrier, that are configured for cross-carrier scheduling via control channel repetition on the scheduled component carrier. In some examples, the decoding candidate manager 1535 may be configured as or may possibly support a means for identifying, based on the indication of the set of multiple component carriers, that a first decoding candidate of a first search space set is linked for control channel repetition to a second decoding candidate of a second search space set for cross-carrier scheduling on the scheduled component carrier.

[0321] In some examples, the set of multiple search space sets of the scheduled component carrier includes a third search space set and a fourth search space set. In some examples, 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. In some examples, 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 that is different from the first search space set index.

[0322] FIG. 16 illustrates a diagram of a system 1600 including a device 1605 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. The device 1605 may be an example of or may include a component of a device 1305, a device 1405, or a base station 105 as described herein. The device 1605 may wirelessly communicate with one or more base stations 105, UEs 115, or any combination thereof. The device 1605 may include components for two-way 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, code 1635, a processor 1640, and an inter-station communications manager 1645. These components may be in electronic communication or may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1650).

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

[0324] In some cases, the device 1605 may include a single antenna 1625. However, in some other cases, the device 1605 may have two or more antennas 1625 that may be capable of simultaneously transmitting or receiving multiple wireless transmissions. The transceiver 1615 may communicate bidirectionally via one or more antennas 1625, wired links, or wireless links, as described herein. For example, the transceiver 1615 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The 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 the one or more antennas 1625. The transceiver 1615, or the transceiver 1615 and one or more antennas 1625, may be an example of the transmitter 1315, the transmitter 1415, the receiver 1310, the receiver 1410, or any combination or components thereof, as described herein.

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

[0326] The processor 1640 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, 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 a memory (e.g., memory 1630) to cause the device 1605 to perform various functions (e.g., functions or tasks supporting techniques for control channel repetition for cross-carrier scheduling). For example, the device 1605 or a component of the device 1605 may include a processor 1640 and a memory 1630 coupled to the processor 1640, where the processor 1640 and the memory 1630 are configured to perform various functions described herein.

[0327] The inter-station communications manager 1645 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with the UE 115 in cooperation with the other base stations 105. For example, the inter-station communications 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 communications manager 1645 may provide an X2 interface in LTE / LTE-A wireless communications network technology to communicate between the base stations 105.

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

[0329] By including or configuring the communications manager 1620 according to examples described herein, the device 1605 may support techniques for improved cross-carrier scheduling. In particular, the techniques described herein may enable the use of PDCCH repetition in the context of cross-carrier scheduling, thereby allowing 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 repetition in the context of cross-carrier scheduling, the techniques described herein may improve the transmit 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, the 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, the memory 1630, the code 1635, or any combination thereof. For example, the code 1635 may include instructions executable by the processor 1640 to cause the device 1605 to perform various aspects of techniques for control channel repetition for cross-carrier scheduling as described herein, or the processor 1640 and the memory 1630 may be configured to perform or support such operations, as the case may be.

[0331] FIG. 17 illustrates a flow chart illustrating a method 1700 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. The operations of the method 1700 may be implemented by a UE or components thereof as described herein. For example, the operations of the method 1700 may be performed by the UE 115 as described with reference to FIGS. 1-12. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0332] At 1705, the method may include receiving control signaling from a base station that identifies a scheduling configuration indicating a first set of search spaces and a second set of search spaces of the scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier. The operations of 1705 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1705 may be performed by a scheduling configuration manager 1125 as described with reference to FIG.

[0333] At 1710, the method may include 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 operations of 1710 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1710 may be performed by a search space set linking configuration manager 1130 as described with reference to FIG.

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

[0335] At 1720, the method may include receiving at least one control message from the base station and over a scheduling component carrier that schedules communication between the base station and the UE over the scheduled component carrier within at least one decoding candidate of the set of decoding candidates. The operations of 1720 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1720 may be performed by a control message 1140 as described with reference to FIG.

[0336] At 1725, the method may include transmitting or receiving communication with a base station over the scheduled component carrier based on the at least one control message. The operations of 1725 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1725 may be performed by a base station communications manager 1145 as described with reference to FIG.

[0337] FIG. 18 illustrates a flowchart illustrating a method 1800 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. The operations of the method 1800 may be implemented by a UE or components thereof as described herein. For example, the operations of the method 1800 may be performed by the UE 115 as described with reference to FIGS. 1-12. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0338] At 1805, the method may include receiving control signaling from a base station that identifies a scheduling configuration indicating a first set of search spaces and a second set of search spaces of the scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier. The operations of 1805 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1805 may be performed by a scheduling configuration manager 1125 as described with reference to FIG.

[0339] At 1810, the method may include 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 operations of 1810 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1810 may be performed by a search space set linking configuration manager 1130 as described with reference to FIG.

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

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

[0342] At 1825, the method may include receiving at least one control message from the base station and over a scheduling component carrier that schedules communication between the base station and the UE over the scheduled component carrier within at least one decoding candidate of the set of decoding candidates. The operations of 1825 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1825 may be performed by a control message 1140 as described with reference to FIG.

[0343] At 1830, the method may include transmitting or receiving communication with a base station over the scheduled component carrier based on the at least one control message. The operations of 1830 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1830 may be performed by a base station communications manager 1145 as described with reference to FIG.

[0344] FIG. 19 illustrates a flowchart illustrating a method 1900 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. The operations of the method 1900 may be implemented by a UE or components thereof as described herein. For example, the operations of the method 1900 may be performed by the UE 115 as described with reference to FIGS. 1-12. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0345] At 1905, the method may include receiving control signaling from a base station that identifies a scheduling configuration indicating a first search space set and a second search space set of the scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier. The operations of 1905 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1905 may be performed by a scheduling configuration manager 1125 as described with reference to FIG.

[0346] At 1910, the method may include 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 operations of 1910 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1910 may be performed by a search space set linking configuration manager 1130 as described with reference to FIG.

[0347] At 1915, the method may include 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 operations of 1915 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1915 may be performed by a decoding candidate manager 1135 as described with reference to FIG.

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

[0349] At 1925, the method may include receiving at least one control message from the base station and over a scheduling component carrier that schedules communication between the base station and the UE over the scheduled component carrier within at least one decoding candidate of the set of decoding candidates. The operations of 1925 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1925 may be performed by a control message 1140 as described with reference to FIG.

[0350] At 1930, the method may include transmitting or receiving communication with a base station over the scheduled component carrier based on the at least one control message. The operations of 1930 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1930 may be performed by a base station communications manager 1145 as described with reference to FIG.

[0351] FIG. 20 illustrates a flow chart illustrating a method 2000 supporting techniques for control channel repetition for cross-carrier scheduling according to aspects of the disclosure. The operations of method 2000 may be implemented by a base station or components thereof as described herein. For example, the operations of method 2000 may be performed by a base station 105 as described with reference to FIGS. 1-8 and 13-16. In some examples, the base station may execute a set of instructions to control functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the described functions.

[0352] At 2005, the method may include transmitting control signaling to the UE identifying a scheduling configuration indicating a first search space set and a second search space set of the scheduling component carrier for scheduling communication on a scheduled component carrier different from the scheduling component carrier. The operations of 2005 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2005 may be performed by a scheduling configuration manager 1525 as described with reference to FIG.

[0353] At 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 a scheduling configuration. The operations of 2010 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2010 may be performed by a search space set linking configuration manager 1530 as described with reference to FIG.

[0354] At 2015, the method may include 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 operations of 2015 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2015 may be performed by a decoding candidate manager 1535 as described with reference to FIG.

[0355] At 2020, the method may include transmitting at least one control message over a scheduling component carrier to the UE and within at least one decoding candidate of the set of decoding candidates, scheduling communication between the base station and the UE over the scheduled component carrier. The operations of 2020 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2020 may be performed by a control message transmission manager 1540 as described with reference to FIG.

[0356] At 2025, the method may include transmitting or receiving communication with the UE over the scheduled component carrier based on the at least one control message. The operations of 2025 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2025 may be performed by a UE communications manager 1545 as described with reference to FIG.

[0357] The following provides a summary of aspects of the disclosure.

[0358] Aspect 1: A method for wireless communications in a UE, the method including: receiving control signaling from a base station, the control signaling identifying a scheduling configuration indicating a first search space set and a second search space set of the scheduling component carrier for scheduling communications on a scheduled component carrier different from the scheduling component carrier; 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; identifying a set of decoding candidates within 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 at least in part on the search space set linking configuration; receiving at least one control message via the scheduling component carrier from the base station and within at least one decoding candidate of the set of decoding candidates, the control message scheduling communications between the base station and the UE via the scheduled component carrier; and transmitting or receiving communications with the base station via the scheduled component carrier based at least in part on the at least one control message.

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

[0360] Aspect 3: The method of any of aspects 1-2, wherein the step of identifying the 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 repetition based at least in part on a scheduling configuration indicating that a first search space set and a second search space set of the scheduled component carrier are linked for control channel repetition.

[0361] Aspect 4: The method of aspect 3, further comprising monitoring a first decoding candidate in a first search space set for a repetition of the control message and a second decoding candidate in a second search space set for the repetition of the control message that is linked to the first decoding candidate based at least in part on at least two search space sets being linked for the control channel repetition.

[0362] Aspect 5: The method of any of aspects 1-4, wherein the step of identifying the search space set linking configuration includes identifying that at least two search space sets are linked for control channel repetition based at least in part on at least two search space sets of a plurality of search space sets of the scheduled component carrier being associated with first and second search space set indexes that are the same as first and second search space set indexes of a first and second search space set of the scheduling component carrier, respectively.

[0363] Aspect 6: The method of any of aspects 1 to 5, wherein the step of identifying the search space set linking configuration includes a step of identifying at least two search space sets to be linked for control channel repetition based at least in part on at least two search space sets of a plurality of search space sets of a scheduled component carrier being configured with the same amount of decoding candidates per aggregation level.

[0364] Aspect 7: The method of any of aspects 1-6, wherein at least one decoding candidate of the set of decoding candidates comprises a pair of decoding candidates, and the method further includes identifying, based at least in part on the pair of decoding candidates corresponding to the same CIF, the same candidate index, and the same aggregation level, that the pair of decoding candidates is to be linked for control channel repetition.

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

[0366] Aspect 9: The method of any of aspects 1-8, wherein identifying the 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 not linked for control channel repetition.

[0367] Aspect 10: The method of aspect 9, further comprising: monitoring a first decoding candidate of a first search space set for the control message and a second decoding candidate of a second search space set for a second control message different from the control message, based at least in part on identifying that at least two search space sets of the multiple search space sets of the scheduled component carrier are not linked due to control channel repetition.

[0368] Aspect 11: The method of any of aspects 9-10, further comprising: identifying, based 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 for control channel repetition to a second decoding candidate of a second search space set for cross-carrier scheduling on the scheduled component carrier.

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

[0370] Aspect 13: The method of any of aspects 1-12, further comprising receiving control signaling indicating 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.

[0371] Aspect 14: The method of any of aspects 1-13, wherein the step of receiving control signaling identifying the scheduling configuration includes receiving control signaling indicating 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.

[0372] Aspect 15: The method of aspect 14, 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 that the third search space set and the fourth search space set are linked or not linked for control channel repetition based at least in part on the first search space set and the second search space set being linked for control channel repetition.

[0373] Aspect 16: The method of any of aspects 1-15, wherein the step of receiving control signaling identifying the scheduling configuration includes receiving control signaling indicating that at least two search space sets of a plurality of search space sets of the scheduled component carrier are configured within a first BWP of the scheduled component carrier, and that the first search space set and the second search space set of the scheduling component carrier are configured within a second BWP of the scheduling component carrier.

[0374] Aspect 17: The method of any of aspects 1-16, further comprising: receiving additional control signaling indicating that a first BWP associated with a first search space set and a second search space set of the scheduling component carrier is active, and a second BWP associated with multiple search space sets of the scheduled component carrier is active; and monitoring a first decoding candidate of the first search space set and a second decoding candidate of the second search space set for one or more iterations of the control message based at least in part on the first BWP and the second BWP being active.

[0375] Aspect 18: The method of any of aspects 1-17, further comprising: monitoring a first decoding candidate of the first search space set for a second control message and a second decoding candidate of the second search space set for a second control message repetition based at least in part on the first search space set being linked to a second search space set for control channel repetition for intra-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.

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

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

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

[0379] Aspect 22: The method of any of aspects 1-21, wherein the plurality of search space sets of the scheduled component carrier comprises a third search space set and a fourth search space set, wherein 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 that is different from the first search space set index.

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

[0381] Aspect 24: The method of aspect 23, wherein identifying the search space set linking configuration includes transmitting additional control signaling to the UE indicating the search space set linking configuration.

[0382] Aspect 25: The method of any of aspects 23-24, wherein the step of identifying the 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 repetition based at least in part on a scheduling configuration indicating that a first search space set and a second search space set of the scheduled component carrier are linked for control channel repetition.

[0383] Aspect 26: The method of any of aspects 23-25, wherein the step of identifying the search space set linking configuration includes identifying that at least two search space sets are linked for control channel repetition based at least in part on at least two search space sets of a plurality of search space sets of the scheduled component carrier being associated with first and second search space set indexes that are the same as first and second search space set indexes of a first and second search space set of the scheduling component carrier, respectively.

[0384] Aspect 27: The method of any of aspects 23-26, wherein the step of identifying the search space set linking configuration includes a step of identifying at least two search space sets to be linked for control channel repetition based at least in part on at least two search space sets of a plurality of search space sets of a scheduled component carrier being configured with the same amount of decoding candidates per aggregation level.

[0385] Aspect 28: The method of any of aspects 23 to 27, wherein the step of identifying the 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 repetition based at least in part on each pair of decoding candidates across the first and second search space sets for the two monitoring occasions being linked for control channel repetition, and each pair of decoding candidates linked for control channel repetition corresponding to the same CIF, the same candidate index, and the same aggregation level.

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

[0387] Aspect 30: The method of any of aspects 23 to 29, wherein the step of identifying the search space set linking configuration includes the step of identifying that at least two search space sets of a plurality of search space sets of a scheduled component carrier are not linked due to control channel repetition.

[0388] Aspect 31: The method of aspect 30, further comprising: identifying, based 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 for control channel repetition to a second decoding candidate of a second search space set for cross-carrier scheduling on the scheduled component carrier.

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

[0390] Aspect 33: The method of any of aspects 23-32, further comprising transmitting control signaling indicating 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.

[0391] Aspect 34: The method of any of aspects 23 to 33, wherein the step of transmitting control signaling identifying the scheduling configuration includes the step of transmitting control signaling indicating 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.

[0392] Aspect 35: The method of aspect 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 that the third search space set and the fourth search space set are linked or not linked for control channel repetition based at least in part on the first search space set and the second search space set being linked for control channel repetition.

[0393] Aspect 36: The method of any of aspects 23 to 35, wherein the step of transmitting control signaling identifying the scheduling configuration includes the step of transmitting control signaling indicating that at least two search space sets of a plurality of search space sets of the scheduled component carrier are configured within a first BWP of the scheduled component carrier, and that the first search space set and the second search space set of the scheduling component carrier are configured within a second BWP of the scheduling component carrier.

[0394] Aspect 37: The method of any of aspects 23-36, further comprising the step of transmitting additional control signaling indicating that a first BWP associated with a first search space set and a ...

Claims

1. An apparatus for wireless communication in a user equipment (UE), comprising: A processor; a memory coupled to the processor; and instructions stored in the memory, the instructions causing the device to: receiving, from a base station, control signaling identifying a scheduling configuration indicating a first set of search spaces and a second set of search spaces of a scheduled component carrier different from the scheduling component carrier for scheduling communications on the scheduled component carrier; 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; identifying a set of decoding candidates within the first search space set and the second search space set of the scheduled component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier based at least in part on the identified search space set linking configuration; receiving at least one control message from the base station and within at least one decoding candidate of the identified set of decoding candidates over the scheduling component carrier, the control message scheduling communication between the base station and the UE over the scheduled component carrier; transmitting or receiving the communication with the base station over the scheduled component carrier based at least in part on the at least one control message; The apparatus is executable by the processor to cause

2. An apparatus for wireless communication in a base station, comprising: A processor; a memory coupled to the processor; and instructions stored in the memory, the instructions causing the device to: transmitting control signaling to a user equipment (UE) identifying a scheduling configuration indicating a first set of search spaces and a second set of search spaces of a scheduled component carrier different from the scheduling component carrier for scheduling communication on the scheduled component carrier; 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; identifying a set of decoding candidates within the first search space set and the second search space set of the scheduled component carrier that are allocated for cross-carrier scheduling of the scheduled component carrier based at least in part on the identified search space set linking configuration; transmitting at least one control message via the scheduling component carrier to the UE and within at least one decoding candidate of the identified set of decoding candidates, the control message scheduling communication between the base station and the UE via the scheduled component carrier; transmitting or receiving the communication with the UE over the scheduled component carrier based at least in part on the transmitted at least one control message; The apparatus is executable by the processor to cause

3. The instructions for identifying the search space set linking configuration may include instructions for the apparatus: identifying at least two search space sets of the plurality of search space sets of the scheduled component carrier to be linked for control channel repetition based at least in part on the at least two search space sets being associated with first and second search space set indexes that are the same as first and second search space set indexes of the first and second search space sets of the scheduling component carrier, respectively; The apparatus of claim 2 , wherein the processor is operable to:

4. The instructions for identifying the search space set linking configuration may include instructions for the apparatus: and identifying at least two search space sets of the plurality of search space sets of the scheduled component carrier to be linked for control channel repetition based at least in part on the at least two search space sets being configured with the same amount of decoding candidates per aggregation level. The apparatus of claim 2 , wherein the processor is operable to:

5. The instructions for identifying the search space set linking configuration may include instructions for the apparatus: identifying at least two search space sets of the plurality of search space sets of the scheduled component carrier to be linked for control channel repetition; and Identifying, based at least in part on the at least two search space sets being linked for control channel repetition, that the at least two search space sets are configured with the same amount of decoding candidates per aggregation level. The apparatus of claim 2 , wherein the processor is operable to:

6. The instructions for identifying the search space set linking configuration may include instructions for the apparatus: each pair of decoding candidates across the first and second search space sets for two monitoring occasions being linked for a control channel repetition; and identifying at least two search space sets of the scheduled component carrier to be linked for a control channel repetition based at least in part on each pair of decoding candidates that are linked for a control channel repetition corresponding to a same carrier indicator field, a same candidate index, and a same aggregation level. The apparatus of claim 2 , wherein the processor is operable to:

7. The instructions for transmitting the control signaling identifying the scheduling configuration include: transmitting the control signaling indicating 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 of claim 2 , wherein the processor is operable to:

8. 8. The apparatus of claim 7, 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 repetition based at least in part on the first search space set and the second search space set being linked for control channel repetition.

9. The instructions for identifying the search space set linking configuration may include instructions for the apparatus: sending additional control signaling to the UE indicating the search space set linking configuration; The apparatus of claim 2 , wherein the processor is operable to:

10. The instructions for identifying the search space set linking configuration may include instructions for the apparatus: identifying at least two search space sets of the plurality of search space sets of the scheduled component carrier to be linked for control channel repetition based at least in part on the scheduling configuration indicating that the first search space set and the second search space set of the scheduled component carrier are linked for control channel repetition; The apparatus of claim 2 , wherein the processor is operable to:

11. The instructions cause the device to: identifying a third set of monitoring occasions within the first search space set of the scheduling component carrier and a fourth set of monitoring occasions within the second search space set of the scheduling component carrier as not being linked for control channel repetition for intra-carrier scheduling; transmitting the control signaling indicating a first set of one or more monitoring occasions for the first search space set and a second set of one or more monitoring occasions for the second search space set; transmitting additional control signaling indicating that a first bandwidth part associated with the first search space set and the second search space set 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, wherein transmitting the at least one control message is based at least in part on the first bandwidth part and the second bandwidth part being active; The apparatus of claim 2 , further executable by the processor to:

12. The instructions for identifying the search space set linking configuration may include instructions for the apparatus: identifying at least two search space sets of the plurality of search space sets of the scheduled component carrier that are not linked due to control channel repetition; The apparatus of claim 2 , wherein the processor is operable to:

13. The instructions cause the device to: Identifying, based at least in part on the search space set linking configuration, that a first decoding candidate of the first search space set is not linked for control channel repetition to a second decoding candidate of the second search space set for cross-carrier scheduling on the scheduled component carrier. The apparatus of claim 12 , further executable by the processor to:

14. 1. A method for wireless communication in a user equipment (UE), comprising: receiving control signaling from a base station identifying a scheduling configuration indicating a first set of search spaces and a second set of search spaces of a scheduled component carrier different from the scheduling component carrier for scheduling communications on said scheduled component carrier; 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; identifying a set of decoding candidates within 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 at least in part on the identified search space set linking configuration; receiving at least one control message from the base station and within at least one decoding candidate of the identified set of decoding candidates over the scheduling component carrier, the control message scheduling communication between the base station and the UE over the scheduled component carrier; transmitting or receiving the communication with the base station over the scheduled component carrier based at least in part on the at least one control message; The method includes:

15. 1. A method for wireless communication in a base station, comprising: transmitting control signaling to a user equipment (UE) identifying a scheduling configuration indicating a first set of search spaces and a second set of search spaces of a scheduled component carrier different from the scheduling component carrier for scheduling communication on the scheduled component carrier; 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; identifying a set of decoding candidates within 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 at least in part on the identified search space set linking configuration; transmitting at least one control message via the scheduling component carrier to the UE and within at least one decoding candidate of the identified set of decoding candidates, the control message scheduling communication between the base station and the UE via the scheduled component carrier; transmitting or receiving the communication with the UE over the scheduled component carrier based at least in part on the transmitted at least one control message; The method includes:

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