Techniques for sharing search space for control channel iterations

Abstract

A method, system, and device for wireless communication are described. A user equipment (UE) may receive control signaling from an access network entity indicating a first search space set and a second search space set. In some cases, a first set of control channel decoding candidates associated with scheduling a first component carrier may be tied for control channel iterations spanning the first search space set and the second search space set, and a second set of control channel decoding candidates associated with scheduling a second component carrier may not be tied for control channel iterations. The UE may identify a search space sharing condition for the first and second sets of control channel decoding candidates, and monitor the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both according to the search space sharing condition.

Description

[Technical Field]

[0001] cross reference This patent application claims the interests of U.S. Provisional Patent Application No. 63 / 163,513, filed on 19 March 2021, entitled "TECHNIQUES FOR SEARCH SPACE SHARING FOR CONTROL CHANNEL REPETITION," and U.S. Patent Application No. 17 / 695,076, filed on 15 March 2022, entitled "TECHNIQUES FOR SEARCH SPACE SHARING FOR CONTROL CHANNEL REPETITION," both of which are assigned to the assignees of this application.

[0002] The following concerns wireless communications, including techniques for sharing the search space for control channel iterations. [Background technology]

[0003] Wireless communication systems are widely deployed to provide various types of communication content, including voice, video, packet data, messaging, and broadcast. These systems may support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems such as Long Term Evolution (LTE) 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). 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, sometimes known as user equipment (UEs). [Overview of the project] [Problems that the invention aims to solve]

[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, to improve the transmit diversity and reliability of wireless communications, a set of search spaces on a scheduling component carrier may be coupled together for control channel iteration. Some techniques for control channel iteration may be insufficient. [Means for solving the problem]

[0005] The techniques described relate to improved methods, systems, devices, and apparatus that support techniques for search space sharing for control channel iterations. Generally, the techniques described achieve search space sharing while performing control channel iterations across search spaces. Specifically, aspects of the disclosure provide techniques and configurations that enable a wireless communication system to use a search space sharing condition when a first set of control channel decoding candidates related to scheduling a first cell is configured for control channel iterations spanning a first and second search space set, and a second set of control channel decoding candidates related to scheduling a second cell is not configured for control channel iterations spanning a search space set. In some cases, search space sharing is not applicable to any control channel candidate in any monitoring opportunity of the search space set. In some other examples, search space sharing may be used between two sets of control channel candidates (for example, to schedule two different cells) where both are either coupled or neither is coupled for control channel iterations. In some cases, search space sharing can be applied between any set of control channel candidates in a first or second search space set, regardless of whether the set of control channel candidates is configured for control channel iterations. Techniques for supporting these and other configurations for search space sharing using control channel iterations are described herein.

[0006] A method for wireless communication in a user device (UE) is described. The method may include the steps of: receiving control signaling from an access network entity indicating a first search space set and a second search space set; identifying search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates is associated with scheduling a first component carrier for control channel iterations spanning the first and second search space sets, or a second set of control channel decoding candidates is associated with scheduling a second component carrier, or both are associated; and monitoring the first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing conditions.

[0007] A device for wireless communication in a UE is described. The device may include a processor, memory coupled to the processor, and instructions stored in memory. Instructions may be executable by the processor to cause the device to receive control signaling from an access network entity indicating a first search space set and a second search space set, to determine a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates is associated with scheduling a first component carrier for control channel iterations spanning the first and second search space sets, or a second set of control channel decoding candidates is associated with scheduling a second component carrier, or both, and to monitor the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing condition.

[0008] Another device for wireless communication in a UE is described. The device may include means for receiving control signaling from an access network entity indicating a first search space set and a second search space set; means for identifying search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates related to scheduling a first component carrier is associated with a control channel iteration spanning the first and second search space sets, or a second set of control channel decoding candidates related to scheduling a second component carrier is associated with a control channel iteration, or both are associated; and means for monitoring the first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, in accordance with the search space sharing conditions.

[0009] A non-temporary, computer-readable medium for storing code for wireless communication in a UE is described. The code may include instructions executable by a processor to receive control signaling from an access network entity indicating a first set of search space sets and a second set of search space sets, to identify search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates is associated with scheduling a first component carrier for a control channel iteration spanning the first and second set of search space sets, or a second set of control channel decoding candidates is associated with scheduling a second component carrier, or both are associated, and to monitor the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing conditions.

[0010] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space shared condition may include an operation, feature, means, or instruction for receiving a control signaling or a second control signaling indicating the search space shared condition.

[0011] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, monitoring may include an operation, feature, means, or instruction for receiving a first control message that schedules a second component carrier on a first decoder in the first search space set of the first set of control channel decoder candidates, relating to scheduling a first component carrier on a first decoder in the first search space set of the first set of control channel decoder candidates, based on a search space sharing condition indicating that the search space sharing can be configured for a first set of control channel decoder candidates and a second set of control channel decoder candidates.

[0012] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving an iteration of a first control message that schedules a second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates, relating to scheduling a first component carrier on a first search space shared condition and that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set.

[0013] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving a first control message to schedule a first component carrier on a first decoder candidate of a second set of control channel decoder candidates, relating to scheduling a second component carrier in a first search space set, based on a search space sharing condition indicating that search space sharing can be configured for a first set of control channel decoder candidates and a second set of control channel decoder candidates.

[0014] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, monitoring may include an operation, feature, means, or instruction for receiving a first control message for scheduling a third component carrier on a first decoder candidate in a first search space set of a first set of control channel decoder candidates related to scheduling a first component carrier, based on a search space sharing condition, where the first set of control channel decoder candidates related to scheduling a first component carrier may be configured for search space sharing, based on the first set of control channel decoder candidates being linked for control channel iterations spanning a first and second search space set, and a third set of control channel decoder candidates related to scheduling a third component carrier being linked for control channel iterations spanning a first and second search space set.

[0015] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving an iteration of a first control message scheduling a third component carrier on a second decoding candidate in a second search space set of a first set of control channel decoding candidates related to scheduling a first component carrier.

[0016] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, monitoring may include an operation, feature, means, or instruction for receiving a first control message for scheduling a third component carrier on a first decoding candidate in a first search space set of a second set of control channel decoding candidates related to scheduling a second component carrier, based on a search space sharing condition, wherein the second set of control channel decoding candidates related to scheduling a second component carrier may be configured for search space sharing, based on the conditions that the second set of control channel decoding candidates is not linked across the first and second search space sets, and the third set of control channel decoding candidates related to scheduling a third component carrier is not linked across the first and second search space sets.

[0017] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing condition may include an operation, feature, means, or instruction to identify that the search space sharing condition indicates that a search space sharing does not need to be established between a first set of control channel decoding candidates and a second set of control channel decoding candidates, based on the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first and second set of search spaces, and a second set of control channel decoding candidates is not linked for control channel iterations spanning a first and second set of search spaces.

[0018] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing condition may include an operation, feature, means, or instruction for identifying that the search space sharing condition indicates that the search space sharing may not be configured for any decoding candidate of the first and second search space sets.

[0019] In some examples of the methods, apparatuses, and non - transient computer - readable media described herein, specifying search space sharing conditions may include operations, features, means, or instructions for an access network entity to transmit an indication of UE capabilities for search space sharing and to receive control signaling or second control signaling indicating search space sharing conditions based on the UE capabilities for search space sharing.

[0020] In some examples of the methods, apparatuses, and non - transient computer - readable media described herein, the indication of UE capabilities may indicate that search space sharing may be possible among a set of control channel decoding candidates that a UE may not be associated with for control channel repetitions.

[0021] In some examples of the methods, apparatuses, and non - transient computer - readable media described herein, the indication of UE capabilities may further indicate that search space sharing may be possible among a set of control channel decoding candidates that a UE may be associated with for control channel repetitions.

[0022] In some examples of the methods, apparatuses, and non - transient computer - readable media described herein, the indication of UE capabilities may indicate that search space sharing related to control channel repetitions may be possible for the UE.

[0023] Some examples of the methods, apparatuses, and non - transient computer - readable media described herein may further include operations, features, means, or instructions for receiving second control signaling from an access network entity to enable or disable search space sharing conditions.

[0024] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, receiving a second control signaling may include an operation, feature, means, or instruction for receiving a second control signaling to enable or disable a search space sharing condition for one or more cell groups, one or more component carriers comprising a set of control channel decoding candidates configured for a UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof.

[0025] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, receiving a second control signaling may include an operation, feature, means, or instruction for receiving a second control signaling via a wireless resource control signaling.

[0026] A method for wireless communication in an access network entity is described. The method may include the steps of: transmitting a control signaling to a UE indicating a first search space set and a second search space set; identifying a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates related to scheduling a first component carrier is associated with a control channel iteration spanning the first and second search space sets, or a second set of control channel decoding candidates related to scheduling a second component carrier, or both are associated; and transmitting a first control message corresponding to at least one of the first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing condition.

[0027] A device for wireless communication in an access network entity is described. The device may include a processor, memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the device to send control signaling to a UE indicating a first search space set and a second search space set; to identify a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates related to scheduling a first component carrier is associated with a control channel iteration spanning the first and second search space sets, or a second set of control channel decoding candidates related to scheduling a second component carrier, or both are associated; and to send a first control message corresponding to at least one of the first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing condition.

[0028] Another device for wireless communication in an access network entity is described. The device may include means for transmitting a control signaling to a UE indicating a first search space set and a second search space set; means for determining a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates related to scheduling a first component carrier is associated with a control channel iteration spanning the first and second search space sets, or a second set of control channel decoding candidates related to scheduling a second component carrier is associated with a control channel iteration, or both are associated; and means for transmitting a first control message corresponding to at least one of the first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, in accordance with the search space sharing condition.

[0029] A non-temporary computer-readable medium for storing code for wireless communication in an access network entity is described. The code may include instructions executable by a processor to send control signaling to a UE indicating a first set of search space sets and a second set of search space sets; to identify search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates related to scheduling a first component carrier is associated with a control channel iteration spanning the first and second set of search space sets, or a second set of control channel decoding candidates related to scheduling a second component carrier, or both are associated; and to send a first control message corresponding to at least one of the first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing conditions.

[0030] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for transmitting a control signaling or a second control signaling indicating a search space sharing condition.

[0031] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmission may include an operation, feature, means, or instruction for transmitting a first control message that schedules a second component carrier on a first decryption candidate in a first search space set of a first set of control channel decryption candidates, relating to scheduling a first component carrier on a first decryption candidate in a first search space set of a first set of control channel decryption candidates, based on a search space sharing condition indicating that a search space sharing can be configured for a first set of control channel decryption candidates and a second set of control channel decryption candidates.

[0032] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for sending iterations of a first control message scheduling a second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates relating to scheduling a first component carrier, based on a search space sharing condition and the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set.

[0033] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for sending a first control message to schedule a first component carrier on a first decoded candidate of a second set of control channel decoded candidates, relating to scheduling a second component carrier in a first search space set, based on a search space sharing condition indicating that search space sharing can be configured for a first set of control channel decoded candidates and a second set of control channel decoded candidates.

[0034] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmission may include an operation, feature, means, or instruction for transmitting a first control message for scheduling a third component carrier on a first decoder candidate in a first search space set of a first set of control channel decoder candidates related to scheduling a first component carrier, the search space sharing condition being that the first set of control channel decoder candidates related to scheduling a first component carrier may be configured for search space sharing, based on the first set of control channel decoder candidates being linked for control channel iterations spanning a first and second search space set, and the third set of control channel decoder candidates related to scheduling a third component carrier being linked for control channel iterations spanning a first and second search space set.

[0035] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for transmitting an iteration of a first control message scheduling a third component carrier on a second decoding candidate in a second search space set of a first set of control channel decoding candidates related to scheduling a first component carrier.

[0036] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmission may include an operation, feature, means, or instruction for transmitting a first control message for scheduling a third component carrier on a first decoding candidate in a first search space set, on a second set of control channel decoding candidates related to scheduling a second component carrier, based on a search space sharing condition, wherein the second set of control channel decoding candidates related to scheduling a second component carrier may be configured for search space sharing, based on the condition that the second set of control channel decoding candidates is not linked across the first and second search space sets, and the third set of control channel decoding candidates related to scheduling a third component carrier is not linked across the first and second search space sets.

[0037] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing condition may include an operation, feature, means, or instruction to identify that the search space sharing condition indicates that a search space sharing does not need to be established between a first set of control channel decoding candidates and a second set of control channel decoding candidates, based on the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first and second set of search spaces, and a second set of control channel decoding candidates is not linked for control channel iterations spanning a first and second set of search spaces.

[0038] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing condition may include an operation, feature, means, or instruction for identifying that the search space sharing condition indicates that the search space sharing may not be configured for any decoding candidate of the first and second search space sets.

[0039] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing condition may include an operation, feature, means, or instruction for receiving an indication of the UE's ability to share a search space from the UE, and transmitting a control signaling or a second control signaling indicating the search space sharing condition based on the UE's ability to share a search space.

[0040] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, the UE capability indication indicates that the UE may be capable of sharing the search space among sets of control channel decoding candidates that may not be linked for control channel iterations.

[0041] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, the indication of UE capability further indicates that the UE may be capable of sharing the search space among sets of control channel decoding candidates that may be linked together for control channel iterations.

[0042] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, the indication of UE capability indicates that the UE may be capable of sharing the search space in relation to control channel iterations.

[0043] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include actions, features, means, or instructions for transmitting to the UE a second control signaling to enable or disable a search space sharing condition.

[0044] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmitting a second control signaling may include an operation, feature, means, or instruction for transmitting a second control signaling to enable or disable a search space sharing condition for one or more cell groups, one or more component carriers comprising a set of control channel decoding candidates configured for a UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof.

[0045] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmitting a second control signaling may include an operation, feature, means, or instruction for transmitting a second control signaling via a radio resource control signaling.

[0046] A method for wireless communication in a user device (UE) is described. The method may include: receiving control signaling from a base station indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is linked for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not linked for control channel iterations spanning the first and second search space sets; identifying a search space sharing configuration for the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, based on the control signaling; and monitoring the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing configuration.

[0047] An apparatus for wireless communication in a UE is described. The apparatus may include a processor, memory coupled to the processor, and instructions stored in the memory. Instructions may be executable by the processor to cause the apparatus to receive control signaling from a base station indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is linked for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not linked for control channel iterations spanning the first and second search space sets; to identify a search space sharing configuration for the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, based on the control signaling; and to monitor the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing configuration.

[0048] Another apparatus for wireless communications in a UE is described. The apparatus may include means for receiving control signaling from a base station indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates relating to scheduling a first component carrier is linked for control channel iterations spanning the first search space set and the second search space set, and a second set of control channel decoding candidates relating to scheduling a second component carrier is not linked for control channel iterations spanning the first search space set and the second search space set; means for identifying a search space sharing configuration for the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, based on the control signaling; and means for monitoring the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing configuration.

[0049] A non-temporary computer-readable medium for storing code for wireless communications in a UE is described. The code may include instructions executable by a processor to receive control signaling from a base station indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is linked for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not linked for control channel iterations spanning the first and second search space sets; to identify a search space sharing configuration for the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, based on the control signaling; and to monitor the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing configuration.

[0050] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a shared search space configuration may include an operation, feature, means, or instruction for receiving a control signaling or a second control signaling indicating a shared search space configuration.

[0051] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, monitoring may include an operation, feature, means, or instruction for receiving a first control message that schedules a second component carrier on a first candidate in the first search space set of the first set of control channel decoding candidates, relating to scheduling a first component carrier on a first candidate in the first search space set of the first set of control channel decoding candidates, based on a search space sharing configuration that indicates the search space sharing can be configured for a first set of control channel decoding candidates and a second set of control channel decoding candidates.

[0052] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving iterations of a first control message scheduling a second component carrier on a second candidate in the second search space set of the first set of control channel decoding candidates, relating to scheduling a first component carrier, based on a search space sharing configuration and the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set.

[0053] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving a first control message to schedule a first component carrier on a first candidate of the second set of control channel decoding candidates, relating to scheduling a second component carrier in the first set of control channel decoding candidates, based on a search space sharing configuration in which the search space sharing can be configured for a first set of control channel decoding candidates and a second set of control channel decoding candidates.

[0054] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, monitoring may include an operation, feature, means, or instruction for receiving a first control message for scheduling a third component carrier on a first decoder candidate in a first search space set of a first set of control channel decoder candidates related to scheduling a first component carrier, based on a search space sharing configuration, where the first set of control channel decoder candidates related to scheduling a first component carrier may be configured for search space sharing, based on the first set of control channel decoder candidates being linked for control channel iterations spanning a first and second search space set, and a third set of control channel decoder candidates related to scheduling a third component carrier being linked for control channel iterations spanning a first and second search space set.

[0055] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving an iteration of a first control message scheduling a third component carrier on a second candidate in a second search space set of a first set of control channel decoding candidates related to scheduling a first component carrier.

[0056] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, monitoring may include an operation, feature, means, or instruction for receiving a first control message for scheduling a third component carrier on a first candidate in a first search space set of a second set of control channel decoding candidates related to scheduling a second component carrier, based on a search space sharing configuration, where the second set of control channel decoding candidates related to scheduling a second component carrier may be configured for search space sharing, based on the fact that the second set of control channel decoding candidates is not linked for control channel iterations spanning the first and second search space sets, and the third set of control channel decoding candidates related to scheduling a third component carrier is not linked for control channel iterations spanning the first and second search space sets.

[0057] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space configuration may include an operation, feature, means, or instruction to identify that a search space sharing configuration indicates that a search space sharing configuration does not need to be established between a first set of candidate candidates and a second set of candidate candidates, based on the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first and second search space set, and a second set of control channel candidate candidates is not linked for control channel iterations spanning a first and second search space set.

[0058] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing configuration may include an operation, feature, means, or instruction to identify that the search space sharing configuration indicates that the search space sharing may not be configured for any decoding candidates of the first and second search space sets.

[0059] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing configuration may include an operation, feature, means, or instruction for transmitting an indication of UE capability for search space sharing to a base station and receiving a control signaling or a second control signaling indicating a search space sharing configuration based on the UE capability for search space sharing.

[0060] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, the UE capability indication indicates that the UE may be capable of sharing the search space among sets of control channel decoding candidates that may not be linked for control channel iterations.

[0061] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, the indication of UE capability further indicates that the UE may be capable of sharing the search space among sets of control channel decoding candidates that may be linked together for control channel iterations.

[0062] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, the indication of UE capability indicates that the UE may be capable of sharing the search space in relation to control channel iterations.

[0063] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for receiving a second control signaling from a base station to enable or disable a search space sharing configuration.

[0064] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, receiving a second control signaling may include an operation, feature, means, or instruction for receiving a second control signaling to enable or disable a search space sharing configuration for one or more cell groups, one or more component carriers comprising a set of control channel decoding candidates configured for a UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof.

[0065] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, receiving a second control signaling may include an operation, feature, means, or instruction for receiving a second control signaling via a wireless resource control signaling.

[0066] A method for wireless communication at a base station is described. The method may include: transmitting a control signaling to a UE indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates relating to scheduling a first component carrier is linked for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates relating to scheduling a second component carrier is not linked for control channel iterations spanning the first and second search space sets; identifying a search space sharing configuration for the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, based on the control signaling; and transmitting a first control message corresponding to at least one of the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing configuration.

[0067] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, memory coupled to the processor, and instructions stored in the memory. Instructions may be executable by the processor to cause the apparatus to transmit to the UE a control signaling indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is linked for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not linked for control channel iterations spanning the first and second search space sets; to identify a search space sharing configuration for the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, based on the control signaling; and to transmit a first control message corresponding to at least one of the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing configuration.

[0068] Another apparatus for wireless communication at a base station is described. The apparatus may include means for transmitting a control signaling to a UE indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates relating to scheduling a first component carrier is linked for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates relating to scheduling a second component carrier is not linked for control channel iterations spanning the first and second search space sets; means for identifying a search space sharing configuration for the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, based on the control signaling; and means for transmitting a first control message corresponding to at least one of the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing configuration.

[0069] A non-temporary computer-readable medium for storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to transmit control signaling to a UE indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is linked for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not linked for control channel iterations spanning the first and second search space sets; identify a search space sharing configuration for the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, based on the control signaling; and transmit a first control message corresponding to at least one of the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing configuration.

[0070] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for transmitting a control signaling or a second control signaling indicating a search space shared configuration.

[0071] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmission may include an operation, feature, means, or instruction for transmitting a first control message that schedules a second component carrier on a first candidate in the first search space set of the first set of control channel decoding candidates, relating to scheduling a first component carrier on a first candidate in the first search space set of the first set of control channel decoding candidates, based on a search space sharing configuration indicating that the search space sharing can be configured for a first set of control channel decoding candidates and a second set of control channel decoding candidates.

[0072] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for sending a series of first control messages scheduling a second component carrier on a second candidate in the second search space set of the first set of control channel decoding candidates, relating to scheduling a first component carrier, based on a search space sharing configuration and the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set.

[0073] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for sending a first control message to schedule a first component carrier on a first candidate of a second set of control channel decoding candidates, relating to scheduling a second component carrier in a first set of control channel decoding candidates, based on a search space sharing configuration in which the search space sharing can be configured for a first set of control channel decoding candidates and a second set of control channel decoding candidates.

[0074] In some examples of methods, apparatus, and non-temporary computer-readable media described herein, transmission may include an operation, feature, means, or instruction for transmitting a first control message for scheduling a third component carrier on a first decoder candidate in a first search space set of a first set of control channel decoder candidates related to scheduling a first component carrier, based on a search space sharing configuration, where the first set of control channel decoder candidates related to scheduling a first component carrier may be configured for search space sharing, based on the first set of control channel decoder candidates being linked for control channel iterations spanning a first and second search space set, and a third set of control channel decoder candidates related to scheduling a third component carrier being linked for control channel iterations spanning a first and second search space set.

[0075] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include operations, features, means, or instructions for transmitting an iteration of a first control message scheduling a third component carrier on a second candidate in a second search space set of a first set of control channel decoding candidates related to scheduling a first component carrier.

[0076] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmission may include an operation, feature, means, or instruction for transmitting a first control message for scheduling a third component carrier on a first candidate in a first search space set of a second set of control channel decoding candidates related to scheduling a second component carrier, based on a search space sharing configuration, where the second set of control channel decoding candidates related to scheduling a second component carrier may be configured for search space sharing, based on the fact that the second set of control channel decoding candidates is not linked for control channel iterations spanning the first and second search space sets, and the third set of control channel decoding candidates related to scheduling a third component carrier is not linked for control channel iterations spanning the first and second search space sets.

[0077] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing configuration may include an operation, feature, means, or instruction to identify that a search space sharing configuration indicates that a search space sharing does not need to be established between a first set of candidate and a second set of candidate, based on the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first and second search space set, and a second set of control channel candidate candidates is not linked for control channel iterations spanning a first and second search space set.

[0078] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing configuration may include an operation, feature, means, or instruction to identify that the search space sharing configuration indicates that the search space sharing may not be configured for any decoding candidates of the first and second search space sets.

[0079] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, identifying a search space sharing configuration may include an operation, feature, means, or instruction for receiving an indication of the UE's capability for search space sharing from the UE, and transmitting a control signaling or a second control signaling indicating the search space sharing configuration based on the UE's capability for search space sharing.

[0080] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, the UE capability indication indicates that the UE may be capable of sharing the search space among sets of control channel decoding candidates that may not be linked for control channel iterations.

[0081] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, the indication of UE capability further indicates that the UE may be capable of sharing the search space among sets of control channel decoding candidates that may be linked together for control channel iterations.

[0082] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, the indication of UE capability indicates that the UE may be capable of sharing the search space in relation to control channel iterations.

[0083] Some examples of methods, apparatus, and non-temporary computer-readable media described herein may further include actions, features, means, or instructions for transmitting a second control signaling to the UE for enabling or disabling a search space sharing configuration.

[0084] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmitting a second control signaling may include an operation, feature, means, or instruction for transmitting a second control signaling to enable or disable a search space sharing configuration for one or more cell groups, one or more component carriers comprising a set of control channel decoding candidates configured for a UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof.

[0085] In some examples of the methods, apparatus, and non-temporary computer-readable media described herein, transmitting a second control signaling may include an operation, feature, means, or instruction for transmitting a second control signaling via a radio resource control signaling. [Brief explanation of the drawing]

[0086] [Figure 1] This figure shows an example of a wireless communication system that supports a technique for sharing a search space for control channel iteration according to an aspect of the present disclosure. [Figure 2] This figure shows an example of resource conditions that support a technique for sharing the search space for control channel iterations according to an aspect of this disclosure. [Figure 3] This figure shows an example of resource conditions that support a technique for sharing the search space for control channel iterations according to an aspect of this disclosure. [Figure 4] This figure shows an example of a wireless communication system that supports a technique for sharing a search space for control channel iteration according to an aspect of the present disclosure. [Figure 5] This figure shows an example of resource conditions that support a technique for sharing the search space for control channel iterations according to an aspect of this disclosure. [Figure 6] This figure shows an example process flow that supports a technique for sharing the search space for control channel iterations according to an aspect of this disclosure. [Figure 7] This is a block diagram of a device supporting a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. [Figure 8] This is a block diagram of a device supporting a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. [Figure 9] This is a block diagram of a communication manager supporting a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. [Figure 10] This is a diagram of a system including a device that supports a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. [Figure 11] This is a block diagram of a device supporting a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. [Figure 12] This is a block diagram of a device supporting a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. [Figure 13] This is a block diagram of a communication manager supporting a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. [Figure 14] This is a diagram of a system including a device that supports a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. [Figure 15] A flowchart shows a method for supporting a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. [Figure 16] A flowchart shows a method for supporting a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. [Figure 17] A flowchart shows a method for supporting a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. [Figure 18] A flowchart shows a method for supporting a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. [Figure 19]A flowchart shows a method for supporting a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. [Figure 20] A flowchart shows a method for supporting a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. [Figure 21] A flowchart shows a method for supporting a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. [Figure 22] A flowchart shows a method for supporting a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. [Modes for carrying out the invention]

[0087] Some wireless communication systems may allow communication within a component carrier to be scheduled via control signaling within the same component carrier (e.g., "self-scheduling" or "intra-carrier scheduling") and / or via control signaling on 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 communication within the same component carrier or on different component carriers. That is, a "scheduled component carrier" can be scheduled via control signaling on one or more "scheduling component carriers". Furthermore, in some implementations, to increase the transmit diversity and reliability of wireless communication, a set of search spaces on a scheduling component carrier may be coupled together for control channel iterations. For example, decoded candidates in different search spaces "coupled" for control channel iterations may be used to communicate multiple iterations of the same control message (e.g., for cross-carrier scheduling or intra-carrier scheduling). Some wireless communication systems may support techniques for shared search spaces. For example, in cross-carrier scheduling, a control channel candidate associated with a first scheduled cell (e.g., associated with a first CIF value) may be used to receive a control message for a second scheduled cell (e.g., associated with a second CIF value). However, in such cases, some wireless communication systems do not provide techniques or conditions that enable shared search spaces for cross-carrier scheduling and control channel iterations on a linked set of search spaces for scheduling component carriers.

[0088] Accordingly, aspects of the present disclosure provide techniques for sharing search space while performing control channel iterations (e.g., physical downlink control channel (PDCCH) iterations). More specifically, aspects of the present disclosure provide techniques and conditions for sharing search space when some scheduling cells are configured for PDCCH iterations and some scheduling cells are not. Accordingly, some techniques may be implemented to configure the UE to support sharing search space between some scheduling cells, while some techniques may be implemented to configure the UE to conditionally support or not support sharing search space between scheduling cells.

[0089] For example, a UE may receive conditions for a first set of search spaces and a second set of search spaces. The UE may consist of a first set of PDCCH candidates related to scheduling a first cell or component carrier, the first PDCCH candidates may be bound together for PDCCH iterations spanning the first and second sets of search spaces. The UE may also consist of a second set of PDCCH candidates related to scheduling a second cell or component carrier, the second set of PDCCH candidates may not be bound together for PDCCH iterations spanning the sets of search spaces, or may not consist of such a set. The UE may identify search space sharing conditions for the first and second sets of PDCCH candidates and, based on the search space sharing conditions, monitor the first set of PDCCH candidates, the second set of PDCCH candidates, or both. The search space sharing conditions may support search space sharing between sets of PDCCH candidates, conditionally support search space sharing between sets of PDCCH candidates, or not support search space sharing between sets of PDCCH candidates.

[0090] In some examples, shared search space may be supported between a first set of PDCCH candidates and a second set of PDCCH candidates. The first set of PDCCH candidates is linked for PDCCH iterations, while the second set is not linked for PDCCH candidates, but a pair of candidates associated with or linked to the first scheduled cell may be used to receive PDCCH signaling for the second scheduled cell. Similarly, a candidate associated with the second scheduled cell in any of the linked search space sets may be used to receive PDCCH for the first scheduled cell. In some other examples, shared search space may be applicable between two sets of PDCCH candidates, both linked for PDCCH iterations, or between two sets of PDCCH candidates, neither linked for PDCCH iterations. For example, shared search space may not be supported between a first set of PDCCH candidates and a second set of PDCCH candidates. However, search space sharing may be supported between a first set of PDCCH candidates and a third set of PDCCH candidates used to schedule a third cell or third component carrier, the third set of PDCCH candidates being configured for PDCCH iterations spanning the first and second search space sets. In some other examples, search space sharing may apply between candidates in a given search space set, but not to linked candidates. In some cases, search space sharing may not apply to candidates in watch opportunities in the first or second search space set.

[0091] To support search space sharing with PDCCH iterations, some additional techniques are described. For example, a UE may demonstrate capabilities related to supporting search space sharing with PDCCH iterations. For example, a UE may demonstrate support for one or more of the search space sharing conditions described herein. In some cases, an access network entity may send control signaling to enable or disable search space sharing conditions. For example, an access network entity may toggle search space sharing for cell groups, scheduling cells, pairs of scheduled cells, search space sets, or any combination thereof.

[0092] Aspects of this disclosure will first be described in the context of wireless communication systems. Aspects of this disclosure will be further illustrated and described by apparatus diagrams, system diagrams, and flowcharts relating to techniques for sharing a search space for control channel iterations.

[0093] Figure 1 shows an example of a wireless communication system 100 supporting a technique for sharing a search space for control channel iteration, according to an aspect of the present disclosure. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support extended broadband communication, ultra-high reliability (e.g., mission-critical) communication, low-latency communication, communication with low-cost, low-complexity devices, or any combination thereof.

[0094] Base stations 105 may be distributed across a geographical area to form a wireless communication system 100 and may be devices of different forms or with different capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base station 105 may establish one or more communication links 125. A coverage area 110 may be an example of a geographical area over which base stations 105 and UEs 115 may support the communication of signals according to one or more radio access technologies.

[0095] The UE115 may be distributed across the entire coverage area 110 of the wireless communication system 100, and each UE115 may be fixed, mobile, or both at different times. The UE115 may be devices of different forms or with different capabilities. Several exemplary UE115 are shown in Figure 1. The UE115 described herein may be capable of communicating with various types of devices, such as other UE115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in Figure 1.

[0096] Base station 105 may communicate with the core network 130, with each other, or both. For example, base station 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). Base station 105 may communicate with each other through the backhaul links 120 (e.g., via X2, Xn, or other interfaces) either directly (e.g., directly between base station 105s) or indirectly (e.g., via the core network 130), or both. In some examples, the backhaul links 120 may be one or more wireless links, or may include one or more wireless links.

[0097] One or more of the base stations 105 described herein may include, or be referred to by, a base transceiver station, radio base station, access point, radio transceiver, NodeB, eNodeB (eNB), next-generation NodeB or giga-NodeB (any of which may be called gNB), Home NodeB, Home eNodeB, or other appropriate terms.

[0098] UE115 may include, or may be referred to as, a mobile device, wireless device, remote device, handheld device, or subscriber device, or any other appropriate term, and “device” may also be referred to as a unit, station, terminal, or client, among other things. UE115 may also include, or may be referred to as, a personal electronic device such as a mobile phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE115 may also include, or may be referred to as, a wireless local loop (WLL) station, an Internet of Things (IoT) device, any Internet of Things (IoE) device, or a machine-type communications (MTC) device, among other things, which may be implemented in an appliance, or various items such as a vehicle, meter, etc.

[0099] The UE115 described herein may be capable of communicating with other UE115s that sometimes act as relays, as shown in Figure 1, as well as with various types of devices, including, among others, base stations 105 and network equipment, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations.

[0100] UE115 and base station 105 may communicate wirelessly with each other via one or more communication links 125 over one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication links 125. For example, a carrier used for communication link 125 may include a portion of the radio frequency spectrum band (e.g., a bandwidth portion (BWP)) operating according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry collected signaling (e.g., synchronization signals, system information), control signaling to coordinate operations with the carrier, user data, or other signaling. The wireless communication system 100 may support communication with UE115 using carrier aggregation or multi-carrier operation. UE115 may 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 duplex (FDD) component carriers and time-division duplex (TDD) component carriers.

[0101] In some examples (for instance, in carrier aggregation configurations), a carrier may also have acquisition or control signaling to coordinate its operation with other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be arranged according to a channel raster for discovery by the UE115. A carrier may operate in standalone mode, where initial acquisition and connection may be performed via the carrier by the UE115, or it may operate in non-standalone mode, where connection is anchored using different carriers (e.g., the same or different radio access technologies).

[0102] The communication link 125 shown in the wireless communication system 100 may include uplink transmissions from the UE 115 to the base station 105, or downlink transmissions from the base station 105 to the UE 115. The carrier may carry downlink communications or uplink communications (for example, in FDD mode), or may be configured to carry downlink communications and uplink communications (for example, in TDD mode).

[0103] A carrier may be associated with a specific bandwidth in the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths for the carrier of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communication system 100 (e.g., base station 105, UE 115, or both) may have a hardware configuration that supports communication on a specific carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication over carriers related to multiple carrier bandwidths. In some examples, each UE 115 being served may be configured to operate on a portion of the carrier bandwidth (e.g., a subband, BWP), or all of it.

[0104] The signal waveform transmitted on a carrier can consist of multiple subcarriers (for example, using multicarrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM). In systems employing MCM techniques, a resource element may consist of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely proportional. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Therefore, the more resource elements the UE115 receives, and the higher the order of the modulation scheme, the higher the data rate of the UE115 can be. Wireless communication resources may refer to a combination of radio frequency spectral resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity of communication with the UE115.

[0105] One or more numerologies may be supported for a carrier, where the numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, UE115 may consist of multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communication for UE115 may be limited to one or more active BWPs.

[0106] The time interval for base station 105 or UE115 is, for example, Ts = 1 / (Δf max ·N f It can refer to a sampling period of ) seconds, and can be expressed as a multiple of the basic time unit, however, Δf max This can represent the maximum supported subcarrier interval, N fThis may represent the maximum supported Discrete Fourier Transform (DFT) size. The time interval of communication resources may be organized according to radio frames, each having a specified time length (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0107] Each frame may contain multiple sequentially numbered subframes or slots, each subframe or slot having the same time length. In some examples, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into several slots. Alternatively, each frame may contain a variable number of slots, the number of slots may depend on the subcarrier interval. Each slot may contain several symbol periods (e.g., depending on the length of the cyclic prefix prepared for each symbol period). In some wireless communication systems 100, a slot may be further divided into several minislots containing one or more symbols. Except for the cyclic prefix, each symbol period may contain one or more (e.g., N) symbols. f The sampling period may include (1) units. The duration of the symbol period may depend on the subcarrier interval or the frequency bandwidth of the operation.

[0108] A subframe, slot, minislot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be called a transmit time interval (TTI). In some examples, the TTI length (e.g., the number of symbol periods in the TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0109] Physical channels can be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels can be multiplexed on a downlink carrier using, for example, one or more of the following techniques: time-division multiplexing (TDM), frequency-division multiplexing (FDM), or hybrid TDM-FDM. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by the number of symbol periods and may extend across the carrier's system bandwidth or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UE115s. For example, one or more UE115s may monitor or search for control regions for control information according to one or more search space sets, each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for control channel candidates may refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. The search space set may include a common search space set configured to send control information to multiple UE115s, and a UE-specific search space set for sending control information to a specific UE115.

[0110] Each base station 105 may provide communication coverage through one or more cells, such as macrocells, small cells, hotspots, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with base station 105 (for example, on a carrier) and may be associated with an identifier for distinguishing neighboring cells (for example, a physical cell identifier (PCID), a virtual cell identifier (VCID), or other). In some examples, a cell may also refer to a geographical coverage area 110 or a portion of geographical coverage area 110 (for example, a sector) on which the logical communication entity operates. Such cells may span from smaller areas (for example, structures, subsets of structures) to larger areas, depending on various factors such as the capabilities of base station 105. For example, a cell may, among other things, be a building, a subset of a building, or external space between or overlapping with geographical coverage area 110.

[0111] Macrocells generally cover relatively large geographical areas (e.g., a radius of several kilometers) and can enable unrestricted access by UE115s subscribed to the services of a network provider that supports macrocells. Small cells may be associated with lower-power base stations 105 compared to macrocells, and small cells may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macrocells. Small cells may provide unrestricted access to UE115s subscribed to the services of a network provider, or they may provide restricted access to UE115s associated with small cells (e.g., UE115s in a limited subscriber group (CSG), UE115s associated with users in a home or office). Base station 105 may support one or more cells and may support communication on one or more cells using one or more component carriers.

[0112] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, Narrowband IoT (NB-IoT), Enhanced Mobile Broadband (eMBB)) that can provide access to different types of devices.

[0113] In some examples, base station 105 may be mobile and therefore provide communication coverage to a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but these different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, heterogeneous networks in which different types of base stations 105 provide coverage to various geographic coverage areas 110 using the same or different radio access technologies.

[0114] The wireless communication system 100 may support synchronous or asynchronous operation. In synchronous operation, base stations 105 may have similar frame timings, and transmissions from different base stations 105 may be approximately synchronized in time. In asynchronous operation, base stations 105 may have different frame timings, and transmissions from different base stations 105 may, in some cases, not be synchronized in time. The techniques described herein may be used for either synchronous or asynchronous operation.

[0115] Some UE115s, such as MTC devices or IoT devices, may be low-cost or low-complexity devices that can provide automated communication between machines (for example, via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that enables devices to communicate with each other or with base stations 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that incorporate sensors or meters for measuring or capturing information and relay that information to a central server or application program that utilizes such information or presents it to a human interacting with the application program. Some UE115s may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security detection, physical access control, and transaction-based business billing.

[0116] Some UE115s may be configured to utilize power-saving operating modes, such as half-duplex communication (e.g., modes that support one-way communication via transmit or receive, but not simultaneous transmit and receive). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power-saving techniques for the UE115 include entering a power-saving deep sleep mode when not engaged in active communication, operating over a limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UE115s may be configured for operation using narrowband protocol types related to a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within, within, or outside the carrier.

[0117] The wireless communication system 100 may be configured to support ultra-high reliability communication, low latency communication, or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-high reliability low latency communication (URLLC) or mission-critical communication. The UE 115 may be designed to support ultra-high reliability, low latency, or critical functions (e.g., mission-critical functions). Ultra-high reliability communication may include private or group communication and may be supported by one or more mission-critical services such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions may include prioritizing services, and mission-critical services may be used for public safety or general commercial purposes. The terms ultra-high reliability, low latency, mission-critical, and ultra-high reliability low latency may be used interchangeably herein.

[0118] In some examples, UE115 may also be able to communicate directly with other UE115 via a device-to-device (D2D) communication link 135 (for example, using a peer-to-peer (P2P) protocol or a D2D protocol). One or more UE115s utilizing D2D communication may be within the geographical coverage area 110 of base station 105. Other UE115s in such a group may be outside the geographical coverage area 110 of base station 105, or in some cases may not be able to receive transmissions from base station 105. In some examples, a group of UE115s communicating via D2D communication may utilize a one-to-many (1:M) system where each UE115 transmits to any other UE115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication takes place between UE115s without the involvement of base station 105.

[0119] In some systems, the D2D communication link 135 may be an example of a communication channel between vehicles (e.g., UE 115), such as a side-link communication channel. In some examples, vehicles may communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or any combination thereof. Vehicles may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information related to the V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure such as roadside units, or with the network via one or more network nodes (e.g., base station 105) using vehicle-to-network (V2N) communication, or both.

[0120] 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 advanced packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)), and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access layer (NAS) functions, such as mobility, authentication, and bearer management for UE 115 serviced by base station 105 associated with the core network 130. User IP packets may be forwarded through user plane entities that may provide IP address allocation and other functions. A user plane entity may be connected to an IP service 150 for one or more network operators. The IP service 150 may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or a packet-switched streaming service.

[0121] Some of the network devices, such as the base station 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 transmit entities 145, which may be called radio heads, smart radio heads, or transmit / receive points (TRPs). Each access network transmit entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or integrated into a single network device (e.g., base station 105).

[0122] The wireless communication system 100 may typically operate using one or more frequency bands in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is called the ultra-high frequency (UHF) region or decimeter band, as the wavelengths range from approximately 1 decimeter to 1 meter. While UHF waves may be blocked or redirected by building and environmental characteristics, their waves can penetrate structures well enough for a macrocell to service an indoor UE 115. Transmitting UHF waves may involve smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmitting using lower frequencies and longer waves in the shortwave (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0123] The wireless communication system 100 may also operate in the very high frequency (SHF) region, using a frequency band from 3 GHz to 30 GHz, also known as the centimeter band, or in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter band. In some examples, the wireless communication system 100 may support millimeter-wave (mmW) communication between a UE 115 and a base station 105, where the EHF antennas of each device may be smaller and more densely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, propagation of EHF transmissions may be subject to greater atmospheric attenuation than SHF or UHF transmissions and may have shorter distances. The techniques disclosed herein may be used across transmissions using one or more different frequency domains, and the specified use of bands across these frequency domains may vary by country or regulatory body.

[0124] The wireless communication system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can utilize License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in unlicensed bands such as the 5 GHz Industrial Scientific and Medical (ISM) band. When operating in the unlicensed radio frequency spectrum band, devices such as the base station 105 and UE 115 can utilize carrier detection 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 the licensed band (e.g., LAA). Operation in the unlicensed spectrum may include, in particular, downlink transmission, uplink transmission, P2P transmission, or D2D transmission.

[0125] Base station 105 or UE115 may be equipped with multiple antennas that can be used to utilize techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE115 may be located in one or more antenna arrays or antenna panels that can support MIMO operation or transmit beamforming or receive beamforming. For example, one or more base station antennas or antenna arrays may be juxtaposed in an antenna assembly such as an antenna tower. In some examples, the antennas or antenna arrays associated with base station 105 may be located in diverse geographical locations. Base station 105 may have an antenna array with several rows and columns of antenna ports that base station 105 can use to support beamforming of communication with UE115. Similarly, UE115 may have one or more antenna arrays that can support various MIMO or beamforming operations. As an addition or alternative, an antenna panel may support radio frequency beamforming for signals transmitted through antenna ports.

[0126] A base station 105 or UE115 may use MIMO communication to enhance spectral efficiency by leveraging multipath signal propagation by transmitting or receiving multiple signals through different spatial layers. Such techniques are sometimes called spatial multiplexing. Multiple signals may be transmitted by a transmitting device through different antennas or different combinations of antennas. Similarly, multiple signals may be transmitted by a receiving device through different antennas or different combinations of antennas. Each of the multiple signals may be called a separate spatial stream and may carry bits related to 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), where multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0127] Beamforming, sometimes called spatial filtering, directional transmission, or directional reception, is a signal processing technique that can be used in a transmitting or receiving device (e.g., base station 105, UE115) to shape or steer an antenna beam (e.g., transmit beam, receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals communicated through the antenna elements of an antenna array such that several signals propagating in a particular orientation relative to the antenna array undergo constructive interference and other signals undergo destructive interference. Coordination of signals communicated through antenna elements may include the transmitting or receiving device applying amplitude offset, phase offset, or both to the signals carried through the antenna elements associated with the device. Coordination associated with each antenna element 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).

[0128] The base station 105 or UE 115 may use beam sweeping techniques as part of its beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Several signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions. For example, the base station 105 may transmit signals according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used to determine the beam direction for later transmission or reception by the base station 105 (e.g., by a transmitting device such as the base station 105, or by a receiving device such as the UE 115).

[0129] Some signals, such as data signals associated with a specific receiving device, may be transmitted by the base station 105 in a single beam direction (for example, a direction associated with a receiving device such as UE115). In some examples, the beam direction associated with transmission along a single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE115 may receive one or more signals transmitted by the base station 105 in different directions, and UE115 may report to the base station 105 the indication of the signals received with the highest signal quality, or possibly an acceptable signal quality.

[0130] In some examples, transmission by a device (e.g., by base station 105 or UE115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from base station 105 to UE115). UE115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may transmit reference signals that may or may not be precoded (e.g., cell-specific reference signals (CRS), channel status information reference signals (CSI-RS)). UE115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). These techniques are described with reference to signals transmitted by base station 105 in one or more directions, but UE 115 may utilize similar techniques to transmit signals multiple times in different directions (for example, to determine the beam direction for subsequent transmission or reception by UE 115) or to transmit signals in a single direction (for example, to transmit data to a receiving device).

[0131] When a receiving device (e.g., UE115) receives various signals from a base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals, it may attempt multiple receiving configurations (e.g., directional listening). For example, the receiving device may attempt multiple receiving directions by receiving through different antenna subarrays, by processing the received signal according to different antenna subarrays, by receiving according to different sets of receive beamforming weights (e.g., different directional listening weights) applied to the received signal at multiple antenna elements of an antenna array, or by processing the received signal according to different sets of receive beamforming weights applied to the received signal at multiple antenna elements of an antenna array, any of which may be referred to as "listening" by different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receiving configuration may be aligned to a beam direction determined based on listening by different receiving configuration directions (e.g., a beam direction determined to have the highest signal intensity, the highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening by multiple beam directions).

[0132] The wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly for communication on logical channels. The Medium Access Control (MAC) layer may perform priority processing and multiplexing logical channels to transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to improve link efficiency by supporting retransmission at the MAC layer. In the control plane, the Radio Resource Control (RRC) protocol layer may establish, configure, and maintain RRC connections between the UE 115 and the base station 105 or core network 130, supporting radio bearers for user plane data. At the physical layer, transport channels may be mapped to physical channels.

[0133] UE115 and base station 105 may support data retransmission to increase the likelihood of successful data reception. Hybrid Automatic Retransmission Request (ARQ) feedback is one technique to increase the likelihood of data being correctly received on communication link 125. HARQ may include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Retransmission Request (ARQ)). HARQ may improve throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise conditions). In some examples, devices may support same-slot HARQ feedback, where the device may provide HARQ feedback within a slot for data received in a previous symbol within a particular slot. In other cases, the device may provide HARQ feedback in subsequent slots or according to some other time interval.

[0134] In some embodiments, the UE 115 of the 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), the UE 115 may be configured with up to five CORESETs within the BWP of a serving cell. A CORESET may be associated with one or more transmit configuration indicator (TCI) states for PDCCH iterations, and may be associated with the amount of resource blocks (RBs) in the frequency domain and the amount of symbols or other TTIs in the time domain (e.g., the amount of OFDM symbols). Furthermore, each CORESET may be associated with one active TCI state. In some embodiments, the CORESET configured in UE115 may be associated with a CCE resource element group (CCE-REG) mapping type (e.g., CCE-REG bundle mapping type), a precoding granularity, an identifier related to scrambling for the PDCCH demodulated reference signal (DMRS) (e.g., a scrambling identifier), the bits to be coded in the DCI content, or any combination thereof.

[0135] In some aspects, UE 115 may be configured using 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 opportunities. In some aspects, the search space set may include a set of control channel monitoring opportunities. For example, the search space set may include a set of monitoring opportunities that occur at regular or irregular intervals (e.g., monitoring opportunities every 10 ms). UE 115 may be configured to blindly decode the signals received at each monitoring opportunity to determine whether the CRC passes at each monitoring opportunity. Additionally, UE 115 may be configured to determine control channel monitoring opportunities associated with a given search space set based on one or more characteristics of the search space set that may be configured (e.g., pre-configured) in UE 115, indicated to UE 115 via base station 105 (e.g., via RRC signaling), or both. UE 115 may be configured using one or more different types of search space sets (e.g., searchSpaceType) including UE-specific search space sets, common search space sets, or both. Additionally, each search space set may be associated with one or more DCI formats to be monitored.

[0136] Parameters of the search space set are the period of the monitoring opportunity in slot units (k s )(e.g., k s slots), the offset of the monitoring opportunity (o s )(e.g., o s slots) (e.g., monitoringSlotPeriodicityAndOffset), the duration (T s )(T s <k s ) indicating the amount of slots within the period during which the search space set exists, or any combination thereof. UE 115 of the wireless communication system 100 is in a slot

[0137]

Number

[0138] and frame η f The number / quantity of PDCCH monitoring opportunities (e.g., PDCCH candidates) within the system.

[0139]

number

[0140] This can be determined in the case of: In some embodiments, when monitoring the control channel, the UE115 will determine the slot

[0141]

number

[0142] Starting from, T s It may be configured to monitor control channel candidates (e.g., PDCCH candidates) for a set of search spaces s between consecutive slots, and the following k s -T s You may refrain from monitoring control channel candidates for a set of search space s between consecutive slots. The number of control channel candidates (e.g., PDCCH candidates) can be based on the aggregation level of wireless communications in UE115 (e.g., the number of CCEs).

[0143] These search space set parameters may be configured at UE115 (e.g., pre-configured), communicated to UE115 via base station 105 (e.g., via RRC signaling), or both. For example, RRC signaling may be used to configure the parameters of the search space set at UE115, including which CORESET the search space set is associated with, the monitoring opportunity period for the search space set, the monitoring opportunity offset, the DCI format to monitor, and the number of PDCCH candidates for a given aggregation level of the search space set.

[0144] Each search space set may be associated with a search space set index. In some implementations, PDCCH candidates may be defined as part of the search space set configuration. For example, a search space set may contain a set of PDCCH candidates, each PDCCH candidate associated with a given aggregation level and candidate index. In some embodiments, UE115 may be configured to monitor PDCCH candidates in a configured search space set. UE115 may be configured to blind decode PDCCH candidates in a search space set (e.g., monitoring opportunities). If UE115 receives a DCI message in a PDCCH candidate, UE115 may identify a CRC pass (e.g., successful decryption) for UE115, and UE115 may act according to the received DCI message (e.g., perform communication scheduled by the DCI message).

[0145] In some embodiments, UE115 may be configured to monitor control channels according to a control channel monitoring pattern (e.g., a PDCCH monitoring pattern) within a slot (e.g., monitoringSymbolsWithinSlot). For example, a PDCCH monitoring pattern within a slot may indicate a first symbol of the CORESET within the slot for PDCCH monitoring. For example, in the context of a slot containing 14 symbols, the CORESET configured in UE115 may be associated with a search space set containing 3 symbols, and the control channel monitoring pattern (e.g., monitoringSymbolsWithinSlot) associated with the search space set may be configured as "01000010001000". In this example, UE115 may be configured to determine that there are 3 monitoring opportunities (e.g., PDCCH candidates) within each slot where the search space set resides. Furthermore, UE115 may be configured to determine that 3 monitoring opportunities begin at the 2nd, 7th, and 11th symbols in each respective slot where the search space resides.

[0146] In some embodiments, multiple search space sets and / or multiple PDCCH candidates may be linked together (e.g., associated with one another) for possible repetitions of the same control channel transmission (e.g., repetitions of DCI). Linked PDCCH candidates may be used to transmit / receive repetitions of the same control message. In other words, PDCCH candidates may be linked together for a “PDCCH repetition”. In the context of a PDCCH repetition, the payload received in two PDCCH candidates (e.g., two PDCCH repetitions) (e.g., a DCI payload) may be the same. For example, a first PDCCH candidate may be associated with or linked to a second PDCCH candidate. In this example, the first repetition of DCI may be transmitted in the first PDCCH candidate, and the second repetition of DCI may be transmitted in the second PDCCH candidate, and the first and second repetitions of DCI are the same. In this example, UE115 may receive and / or decode only the first repetition of DCI or only the second repetition of DCI. As an addition or alternative, UE115 may receive and / or decode both the first and second iterations of the DCI by performing soft synthesis of the first and second iterations of the DCI, and the UE may recognize the association before decoding. In some embodiments, the associated / associated PDCCH candidates may have the same aggregation level (e.g., the same number of CCEs).

[0147] In some embodiments, for a PDCCH iteration, related PDCCH candidates in different search space sets associated with the corresponding CORESET may be linked together (e.g., associated) for the PDCCH iteration. In some cases, two PDCCH candidates having the same candidate index across two associated search space sets may be linked or associated. In other cases, PDCCH candidates having the same starting CCE index may be linked. Furthermore, UE115 may be composed of a set of linked / related PDCCH candidates in the same slot or TTI (e.g., an in-slot PDCCH iteration), a set of linked / related PDCCH candidates in different slots (e.g., an in-slot PDCCH iteration), or both.

[0148] 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 the case where control signaling transmitted / received on a first component carrier (e.g., scheduling component carrier, scheduling cell) is used to schedule communication (e.g., physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH)) on different component carriers (e.g., scheduling component carrier, scheduling cell). Conversely, intra-carrier scheduling, or self-scheduling, refers to the case where control signaling transmitted / received on one component carrier is used to schedule communication on the same component carrier (e.g., the same cell).

[0149] In some embodiments, the search space set may include control channel candidates (e.g., PDCCH candidates) configured for self-scheduling, cross-carrier scheduling, or both. CCEs associated with control channel candidates for different scheduled component carriers (e.g., PDCCH candidates for self-scheduling, PDCCH candidates for cross-carrier scheduling) within the watch opportunities of the search space set may be identified separately based on several candidates for each aggregation level. The number / quantity of candidates for each aggregation level may be configured in the scheduled component carrier and may be watched in the scheduling component carrier. For example, a watch opportunity for the search space set includes a set of PDCCH candidates with aggregation level 2 (e.g., 2 CCEs for each PDCCH candidate). In this example, the set of PDCCH candidates may include a first subset of PDCCH candidates configured for self-scheduling (e.g., a subset of PDCCH candidates with CIF=0) and a second subset of PDCCH candidates for cross-carrier scheduling (e.g., a subset of PDCCH candidates with CIF=1). In this regard, a single set of search spaces may include PDCCH candidates configured for self-scheduling, cross-carrier scheduling, or both.

[0150] The wireless communication system 100 may be configured to support a search space sharing technique. For search space sharing, a first scheduled cell (for example, a first CIF value (n CI,1 A PDCCH candidate related to the second scheduled cell is when the DCI size corresponding to the first scheduled cell is the same as the DCI size corresponding to the second scheduled cell (for example, the second CIF value (n CI,2It can be used to receive control messages for (corresponding to ). In some cases, search space sharing can be applied to uplink DCI formats and downlink DCI formats other than fallback DCI. For example, in uplink-related DCI, search space sharing can be used for DCI formats other than DCI format 0_0 that schedule PUSCH transmissions or uplink grant Type 2 PUSCH releases. In downlink-related DCI, search space sharing may be used for DCI formats that schedule PDSCH iterations, for semi-persistent scheduling (SPS) PDSCH releases, or to indicate secondary cell pauses, or for other formats other than DCI format 1_0. The DCI size can be determined based on various conditions per scheduled component carrier. In some cases, in cross-carrier scheduling, UE115 may indicate support for downlink (e.g., via the "searchSpaceSharingCA-DL" parameter), uplink (e.g., via the "searchSpaceSharingCA-UL" parameter), or both search space sharing (e.g., via UE capability signaling). In some systems, if UE115 indicates support for shared search space, shared search space may be applicable to support a control signaling format.

[0151] Some wireless communication systems do not provide techniques or conditions that support both shared search spaces and PDCCH iterations. For example, shared search spaces may be a complex technique, and this may be optional in some systems. A limit for blind decoding (e.g., the number of PDCCH candidates to monitor per slot or per unit of time) may be defined for each scheduled cell. Shared search spaces allow the UE115 to substantially monitor more PDCCH candidates than the limit for blind decoding, because one candidate may be used to receive a PDCCH for more than one scheduled cell. PDCCH iterations can also increase the complexity of the UE, based on the consideration of linked candidates across two different sets of search spaces and the soft synthesis of two linked PDCCH candidates. In addition, in two linked sets of search spaces, candidates corresponding to a first scheduled cell may be linked (e.g., configured for PDCCH iterations), while candidates for a second scheduled cell may be separate (e.g., not linked or configured for PDCCH iterations).

[0152] Therefore, the UE 115 and base station 105 or access network entity 140 of the wireless communication system 100 may support techniques for supporting search space sharing and PDCCH iteration. More specifically, the wireless communication system 100 may support conditions or rules for supporting both PDCCH iteration and search space sharing. In addition, the wireless communication system 100 may support signaling to indicate UE capability for search space sharing using PDCCH iteration, and RRC configuration signaling to establish, enable, or disable conditions for these techniques.

[0153] For example, UE115 may receive conditions from base station 105 or access network entity 140 for a first and second set of search space. UE115 may be configured with a first set of PDCCH candidates related to scheduling a first cell or component carrier, the first set of PDCCH candidates may be bound together for PDCCH iterations spanning the first and second set of search space. UE115 may also be configured with a second set of PDCCH candidates related to scheduling a second cell or component carrier, the second set of PDCCH candidates may not be bound together for PDCCH iterations spanning the set of search space, or may not be configured at all. UE115 may identify search space sharing conditions for the first and second sets of PDCCH candidates and, based on the search space sharing conditions, may monitor the first set of PDCCH candidates, the second set of PDCCH candidates, or both. The search space sharing condition may support search space sharing between sets of PDCCH candidates, conditionally support search space sharing between sets of PDCCH candidates, or not support search space sharing between sets of PDCCH candidates.

[0154] In some examples, shared search space may be supported between a first set of PDCCH candidates and a second set of PDCCH candidates. The first set of PDCCH candidates is linked for PDCCH iterations, while the second set is not linked for PDCCH candidates, but a pair of candidates associated with or linked to the first scheduled cell may be used to receive PDCCH signaling for the second scheduled cell. Similarly, a candidate associated with the second scheduled cell in any of the linked search space sets may be used to receive PDCCH for the first scheduled cell. In some other examples, shared search space may be applicable between two sets of PDCCH candidates, both linked for PDCCH iterations, or between two sets of PDCCH candidates, neither linked for PDCCH iterations. For example, shared search space may not be supported between a first set of PDCCH candidates and a second set of PDCCH candidates. However, search space sharing may be supported between a first set of PDCCH candidates and a third set of PDCCH candidates used to schedule a third cell or third component carrier, the third set of PDCCH candidates being configured for PDCCH iterations spanning the first and second search space sets. In some other examples, search space sharing may apply between candidates in a given search space set, but not to linked candidates. In some cases, search space sharing may not apply to candidates in watch opportunities in the first or second search space set.

[0155] To support search space sharing with PDCCH iterations, some additional techniques are described. For example, UE115 may demonstrate capabilities related to supporting search space sharing with PDCCH iterations. For example, UE115 may demonstrate support for one or more of the search space sharing conditions described herein. A search space sharing condition may refer to a scenario in which UE115 can make an internal decision regarding search space sharing that is not directly based on signaling or instructions from the access network entity 140 or base station 105. In some cases, base station 105 or access network entity 140 may send control signaling to enable or disable the search space sharing condition. For example, base station 105 may switch search space sharing for cell groups, scheduling cells, pairs of scheduled cells, search space sets, or any combination thereof.

[0156] Figure 2 shows an example of a resource condition 200 that supports a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. An aspect of the resource condition 200 may implement the wireless communication system 100, or may be implemented by the wireless communication system 100.

[0157] As previously described herein, multiple search space sets 205 can be linked together for control channel iterations (e.g., PDCCH iterations). For example, as shown in resource condition 200, a first search space set 205-a can be linked to a second search space set 205-b. Specifically, the watch opportunities 210 associated with the first search space set 205-a (e.g., watch opportunities 210-a, 210-b, 210-e, 210-f) can be linked to the watch opportunities 210 associated with the second search space set 205-b (e.g., watch opportunities 210-c, 210-d, 210-g, 210-h). In some embodiments, relevant PDCCH candidates in each search space set 205 associated with the corresponding CORESET (e.g., PDCCH candidates in the watch opportunities 210 of each search space set 205) can be linked together (e.g., associated) for PDCCH iterations.

[0158] In some cases, two PDCCH candidates having the same candidate index across two related search space sets may be linked or associated. In other cases, PDCCH candidates having the same starting CCE index may be linked. Furthermore, UE115 may consist of linked / related PDCCH candidates in the same slot or TTI (e.g., intra-slot PDCCH iterations), linked / related PDCCH candidates in different slots (e.g., intra-slot PDCCH iterations), or both.

[0159] Associations (e.g., linking) between search space sets 205 and / or between PDCCH candidates may be configured (e.g., pre-configured) at UE 115, signaled to UE 115 by base station 105 (e.g., via RRC signaling), or both. For example, UE 115 may receive an RRC message indicating that a first PDCCH candidate in a first search space set 205-a is linked (e.g., associated) with a second PDCCH candidate in a second search space set 205-b. As another example, UE 115 may receive an RRC message indicating that a first search space set 205-a is linked (e.g., associated) with a second search space set 205-b for PDCCH iterations. In this example, PDCCH candidates with the same aggregation level and the same candidate index may be linked between the first search space set 205 and the second search space set 205. Specifically, the first search space set 205-a and the second search space set 205-b may each include a first set of PDCCH candidates (a first set of monitoring opportunities 210) and a second set of PDCCH candidates (a second set of monitoring opportunities 210), with the first set of PDCCH candidates being associated with the second set of PDCCH candidates.

[0160] In some cases, the first and second sets of monitoring opportunities 210 may contain the same amount of monitoring opportunities / PDCCH candidates (e.g., one-to-one mappings of monitoring opportunities). For example, monitoring opportunity 210-a associated with the first search space set 205-a may contain the same amount of PDCCH candidates as monitoring opportunity 210-c associated with the second search space set 205-b. Similarly, monitoring opportunities 210-b, 210-e, and 210-f associated with the first search space set may contain the same amount of PDCCH candidates as monitoring opportunities 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 constructed using the same amount of PDCCH candidates for each aggregation level.

[0161] In some embodiments, embodiments of resource condition 200 may support techniques for both controlled channel iterations (e.g., PDCCH iterations) and search space sharing. In some cases, embodiments of resource condition 200 may support techniques and configurations that enable search space sharing for sets of search spaces that are linked for PDCCH iterations, not linked for PDCCH iterations, or both. In some examples, embodiments of resource condition 200 may conditionally support techniques and configurations for search space sharing for sets of search spaces that are linked for PDCCH iterations, not linked for PDCCH iterations, or both. Some exemplary techniques or configurations are described in further detail herein with reference to Figures 4–6.

[0162] Figure 3 shows an example of resource condition 300 supporting a technique for sharing a search space for control channel iterations according to an aspect of this disclosure. An aspect of resource condition 200 may implement a wireless communication system 100, resource condition 200, or both, or both. Resource condition 300 represents a condition for intra-carrier scheduling and inter-carrier (e.g., cross-carrier) scheduling.

[0163] In some embodiments, some wireless communication systems (e.g., wireless communication system 100) may be configured to support inter-carrier scheduling (e.g., cross-carrier scheduling), intra-carrier scheduling (e.g., self-scheduling), or both. Inter-carrier scheduling, or cross-carrier scheduling, refers to cases where control signaling transmitted / received on a first component carrier (e.g., scheduling component carrier, scheduling cell) is used to schedule communications (e.g., PDSCH, PUSCH) on a different component carrier (e.g., scheduled component carrier, scheduled cell). Conversely, intra-carrier scheduling, or self-scheduling, refers to cases where control signaling transmitted / received on a component carrier is used to schedule communications on the same component carrier (e.g., the same cell).

[0164] For example, as shown in resource condition 300, the scheduling component carrier 305-a may be associated with search space sets 310-a, 310-b, 310-c, and 310-d 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.

[0165] In some implementations, search space sets 310 having the same search space set index (searchSpaceId) within a scheduling component carrier 305-a (e.g., a scheduling cell) and a scheduled component carrier 305-b (e.g., a scheduled cell) can be associated with each other (e.g., linked). For example, a first search space set 310-a having a first search space set index (e.g., searchSpaceId=1) on a scheduling component carrier 305-a can be linked in cross-carrier scheduling to a second search space set 310-e having the first search space set index (e.g., searchSpaceId=1) on a scheduled component carrier 305-b. Specifically, this search space set in the scheduled component carrier 305-b may be linked to a search space set in a scheduling component carrier 305-a, and the conditions of the search space set in the scheduled component carrier 305-b may be used to determine the number of decryption candidates to be monitored within the scheduling component carrier 305-a.

[0166] Accordingly, the terms “to be linked,” “to link,” and similar terms may be used throughout this disclosure in two different contexts. First, related PDCCH candidates in different search space sets may be said to be “linked” for PDCCH iterations, in which case multiple iterations of the same control message may be sent / received within the linked PDCCH candidates. Second, a search space set in a scheduled component carrier may be said to be “linked” with a search space set in a scheduling component carrier for cross-carrier scheduling, in which case the conditions of the search space set in the scheduled component carrier may be used to determine the number of decoded candidates to be monitored within the search space set of the scheduling component carrier.

[0167] In some embodiments, cross-carrier scheduling may be performed only if both the BWPs associated with the linked search space set 310 in the scheduling component carrier 305-a and the scheduled component carrier 305-b are active. In other words, continuing the above example, the UE 115 may be configured to apply the search space set 310 for scheduling the scheduled component carrier 305-b in the scheduling component carrier 305-a only if both the downlink BWPs in the linked search space set 310 in the scheduled component carrier 305-b and the scheduling component carrier 305-a are active.

[0168] For example, UE115 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, UE115 may be configured to perform cross-carrier scheduling (for example, applying the first search space set 310-a of the scheduling component carrier 305-a to the scheduled component carrier 305-b for cross-carrier scheduling) only when both the first BWP associated with the first search space set 310-a and the second BWP associated with the second search space set 310-e are active. In some cases, the first and second BWPs for the linked search space sets 310-a and 310-e may be the same.

[0169] As an addition or alternative, the search space set 310 of the scheduling component carrier 305-a may be configured for in-carrier scheduling. Specifically, 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 315-a, 315-c, 315-e of control channel candidates (e.g., PDCCH candidates) configured for in-carrier scheduling (e.g., self-scheduling), and a second set 315-b, 315-d of control channel candidates configured for cross-carrier scheduling. In this regard, control signaling performed via a first set of control channel candidates 315-a, 315-c, and 315-e may be used to schedule communication via the scheduling component carrier 305-a, while control signaling performed via a second set of control channel candidates 315-b and 315-d may be used to schedule communication via the scheduled component carrier 305-b (for example, within the search space set 310-e).

[0170] In some embodiments, a CIF within a control signaling message (e.g., a DCI message) may indicate whether the control signaling schedules communication on the same component carrier from which it was sent / received, or on a different component carrier. For example, a DCI with a CIF value of 0 (e.g., CIF=0) may indicate that the DCI schedules communication on the same component carrier from which it was sent / received. In this regard, a CIF value of 0 may indicate self-scheduling. As another example, a DCI with a non-zero CIF value (e.g., CIF=1, 2, etc.) may indicate that the DCI schedules communication on a different component carrier from the one from which it was sent / received. In this regard, a non-zero CIF value may indicate cross-carrier scheduling.

[0171] Furthermore, each control channel candidate 315 may be associated with a CIF value used for intra-carrier scheduling and cross-carrier scheduling. For example, as shown in resource condition 300, a first set of control channel candidates 315-a, 315-c, and 315-e may be associated with a first CIF value configured for intra-carrier scheduling (e.g., CIF=0), and a second set of control channel candidates 315-b and 315-d may be associated with a second CIF value configured for cross-carrier scheduling (e.g., CIF=1). In some embodiments, the CIF may consist of 0 to 3 bits. If the DCI includes a CIF consisting of 0 bits, the DCI may only support self-scheduling.

[0172] The CCEs associated with control channel candidates 315 for different scheduled component carriers within the monitoring opportunities of the search space set 310 (e.g., a first set of control channel candidates 315-a, 315-c, 315-e for self-scheduling, and a second set of control channel candidates 315-b, 315-d for cross-carrier scheduling) can be identified separately based on the number of candidates for each aggregation level. The number of candidates for each aggregation level may be configured in the scheduled component carrier 305-b or monitored in the scheduling component carrier 305-a. For example, the first search space set 310-a may include monitoring opportunities that include a set of control channel candidates 315 having an aggregation level of 2 (e.g., two CCEs for each control channel candidate 315). In this example, the set of control channel candidates 315 may include a first subset 315-a, 315-c, 315-e of control channel candidates configured for self-scheduling (e.g., a subset of PDCCH candidates with CIF=0), and a second subset 315-b, 315-d of control channel candidates for cross-carrier scheduling (e.g., a subset of PDCCH candidates with CIF=1). In this regard, a single search space set 310 may include PDCCH candidates configured for self-scheduling, cross-carrier scheduling, or both. In some examples, time-domain behavior, monitoring opportunities, DCI formats to monitor, or any combination thereof may be configured in the search space (SS) set of the scheduling cell, and the number of candidates for each aggregation level may be configured in the search space set of the scheduled cell (e.g., a search space set with the same index). For example, the dotted arrows in Figure 3 represent the association (link) between search space sets that have the same search space set index in the scheduling cell and the scheduled cell (for example, the link 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).

[0173] In some embodiments, the scheduled component carrier 305-b (e.g., the scheduled cell) may not be configured using CORESET, but may be configured using search space sets 310 (e.g., search space sets 310-e, 310-f, 310-g, 310-h). For the search space sets 310 configured in the scheduled component carrier 305-b, fields related to the search space set index (e.g., searchSpaceId) and the number of control channel candidates per aggregation level (e.g., nrofCandidates) may be configured. In comparison, other fields for the search space sets 310 configured in the scheduled component carrier 305-b, including fields related to CORESET, fields related to time domain attributes (e.g., period, offset, duration, monitoring symbols per slot), and fields related to the DCI format to be monitored, may not exist or be configured. Specifically, these fields (with the exception of fields relating to several control channel candidates for each aggregation level) may be defined for a search space set 310 (for example, a search space set with the same index) of scheduling component carriers 305-a that schedule each scheduled component carrier 305-b.

[0174] In some examples, resource condition 300 may indicate a condition for search space sharing. For search space sharing, a control channel candidate 315 associated with a first scheduled component carrier 305, or a set of control channel candidates 315, may be used to receive a PDCCH for a second scheduled component carrier 305. If the DCI size corresponding to the first scheduled component carrier 305 is the same as the DCI size corresponding to the second scheduled component carrier 305, then a PDCCH candidate associated with the first scheduled component carrier 305 may be used to receive a PDCCH for the second scheduled component carrier 305. For example, a control channel candidate 315-a (e.g., associated with scheduled component carrier 305-a) may be used to receive a PDCCH for scheduled component carrier 305-b.

[0175] In some cases, search space sharing may be applied to uplink DCI formats and downlink DCI formats other than fallback DCI. For example, in uplink-related DCI, search space sharing may be used for DCI formats other than DCI format 0_0 that schedule push transmissions or uplink grant Type 2 push releases. In downlink-related DCI, search space sharing may be used for DCI formats that schedule PDSCH iterations, for SPS PDSCH releases, or to indicate secondary cell pauses, or for other formats other than DCI format 1_0. The DCI size may be determined based on various conditions for each scheduled component carrier. In some cases, in cross-carrier scheduling, UE115 may indicate support for search space sharing for downlink (e.g., via the "searchSpaceSharingCA-DL" parameter), uplink (e.g., via the "searchSpaceSharingCA-UL" parameter), or both (e.g., through UE capability signaling). In some systems, if UE115 indicates support for shared search space, shared search space may be applicable to support a control signaling format.

[0176] In some embodiments, embodiments of resource condition 300 may support techniques for shared search space and controlled channel iterations (e.g., PDCCH iterations). Specifically, as will be described in more detail herein with respect to Figures 4 to 6, embodiments of resource condition 300 may support techniques and configurations that enable one or more rules or conditions to support both shared search space and controlled channel iterations.

[0177] Figure 4 shows an example of a wireless communication system 400 supporting a technique for sharing a search space for control channel iteration according to an aspect of the present disclosure. In some examples, the wireless communication system 400 may implement or be implemented by an aspect of the wireless communication system 100, resource condition 200, resource condition 300, or any combination thereof. For example, as described in Figures 1 to 3, the wireless communication system 400 may support control conditions for sharing a search space and a control channel iteration technique.

[0178] The wireless communication system 400 may include base station 105-a and UE115-a, which may be examples of base station 105 and UE115 as described with reference to Figure 1. UE115-a may communicate with base station 105-a using communication link 405, which may be an example of an NR or LTE link between UE115-a and base station 105-a, or by communicating with access network entity 140. In some cases, communication link 405 between UE115-a and base station 105-a may include an example of an access link (e.g., a Uu link) which may include a bidirectional link that enables both uplink and downlink communication. For example, UE115-a may use communication link 405 to transmit uplink signals to base station 105-a, such as uplink control signals or uplink data signals, and base station 105-a may use communication link 405 to transmit downlink signals to UE115-a, such as downlink control signals or downlink data signals.

[0179] In some embodiments, the UE 115-a and base station 105-b of the wireless communication system 400 may support techniques for search space sharing and control channel iteration. Specifically, the UE 115-a and base station 105-a of the wireless communication system 400 may support techniques and configurations that enable multiple search space sets on a scheduled component carrier to be linked for control channel iteration, while also supporting search space sharing between search spaces in one or more search space sets.

[0180] In some embodiments, the UE 115-a and base station 105-a of the wireless communication system 400 may support techniques for control channel iterations (e.g., PDCCH iterations) spanning multiple component carriers for cross-carrier scheduling. Specifically, the techniques described herein support techniques for "coupling" PDCCH candidates across multiple scheduling component carriers for PDCCH iterations, where multiple PDCCH candidates can be used to schedule communications within the scheduled component carrier. Thus, the techniques described herein may enable communications on the scheduled component carrier to be scheduled by iterations of control messages transmitted / received across multiple scheduling component carriers.

[0181] In some cases, the UE may be configured using cross-carrier scheduling so that two different scheduling component carriers are configured to schedule one scheduled component carrier, and two SS sets on the two scheduling component carriers may be coupled for PDCCH iterations to schedule PDSCH and / or PUSCH on the scheduled cell. One PDCCH candidate in a monitoring opportunity of a first search space set on the first scheduling component carrier (CC) may be coupled with another PDCCH candidate in a monitoring opportunity of a second SS set on the second scheduling component carrier. DCI format 0_1 / 0_2 (e.g., for scheduling PUSCH or for uplink Type 2 CG release) or DCI format 1_1 / 1_2 (e.g., for scheduling PDSCH or for SPS release) may be detected in coupled PDCCH candidates spanning the two scheduling component carriers. As described in some examples herein, the scheduled component carrier is the same as one of the two scheduling component carriers. For example, the two scheduling component carriers could be a PCell and an sSCell (scheduling SCell), and the scheduled cell could be a PCell. In another example, the scheduled component carrier could be a third component carrier distinct from the scheduling component carriers.

[0182] For example, UE115-a may receive a condition 410 from base station 105-a for scheduling communication on one or more component carriers. The condition 410 may be transmitted via control signaling, including RRC messages, synchronous signal block (SSB) messages, DCI messages, or any combination thereof. In some embodiments, the condition 410 may indicate a plurality of downlink control channel candidates, or a plurality of sets of downlink control channel candidates, which may or may not be linked for control channel iteration. The downlink control channel candidates may be used to schedule communication on one or more component carriers.

[0183] For example, UE115-a may receive control signaling (e.g., condition 410) indicating a first set of search space sets and a second set of search space sets, and a plurality of sets of control channel candidates. A first set of control channel decoding candidates (e.g., PDCCH candidates) associated with scheduling a first component carrier, and a first set of control channel decoding candidates may be linked for a control channel iteration (e.g., PDCCH iteration). A second set of control channel decoding candidates may be associated with scheduling a second component carrier, and the second set of control channel decoding candidates may not be linked across the first set of search space sets.

[0184] In some cases, UE115-a may receive control signaling (e.g., RRC messages, DCI messages) from base station 105-a indicating search space set binding conditions for a set of search space sets of the scheduled component carrier. In some cases, UE115-a may receive control signaling indicating search space set binding conditions based on having received control signaling containing condition 410. As an addition or alternative, condition 410 and the search space set binding conditions may be communicated within the same control signaling (e.g., via the same RRC message). Furthermore, in some cases, UE115-a may be configured (e.g., pre-configured) with the search space set binding conditions.

[0185] In some embodiments, UE115-a, base station 105-a, or both may identify the search space set binding conditions. In some embodiments, UE115-a and / or base station 105-a may identify the search space set binding conditions based on having transmitted / received control signaling indicating the search space set binding conditions. Additionally or alternatively, UE115-a may identify the search space set binding conditions based on having transmitted / received control signaling including condition 410. Furthermore, in some cases, UE115-a may be configured (e.g., pre-configured) with the search space set binding conditions and thus configured to identify the search space set binding conditions without control signaling from base station 105-a.

[0186] In some embodiments, the search space set linking condition may indicate whether or not the search space sets on the scheduled component carrier are linked for control channel iterations. That is, the search space set linking condition may indicate whether control channel iterations via the search space sets of the scheduling component carrier can be used to schedule communications within the search space sets of the scheduled component carrier. If two or more search space sets on the scheduling component carrier are linked for control channel iterations, the control channel iterations on the scheduling component carrier can be used to schedule communications on the scheduled component carrier using several PDCCH candidates determined from two or more search space sets of the scheduled component carrier. Conversely, if two or more search space sets on the scheduling component carrier are not linked (e.g., unlinked) for control channel iterations, the control channel iterations on the scheduling component carrier may not be used to schedule communications on two or more search space sets of the scheduled component carrier. In some embodiments, due to the fact that scheduled component carriers are scheduled via control signaling on scheduling component carriers, the search space set of scheduled component carriers may not actually be monitored by UE115-a and may therefore be referred to as a "dummy" search space set.

[0187] Therefore, by identifying search space set binding conditions, the UE115-a and base station 105-a may be configured to determine whether or not the search space set of a scheduled component carrier is bound for control channel iterations. In some embodiments, the UE115-a and / or base station 105-a may determine whether or not the search space set of a scheduled component carrier is bound for control channel iterations based on explicit signaling, scheduling configuration, a search space set index associated with the search space sets of a scheduling component carrier and / or a scheduled component carrier, a quantity of decoded candidates per aggregation level, predefined rules, or any combination thereof.

[0188] UE115-a or base station 105-a, or both, may identify the conditions for search space sharing. Based on the conditions for search space sharing, UE115-a or base station 105-a, or both, may determine whether search space sharing is supported between two sets of control channel decoding candidates in a first search space set, or between two sets of control channel decoding candidates in a second search space set, or both. For example, the conditions for search space sharing may include a set of rules corresponding to whether search space sharing is supported between any two sets of control channel candidates related to different scheduled component carriers. For example, the conditions may indicate whether search space sharing is supported between two sets of five candidates based on other conditions for the set of control channel candidates, such as both being linked for PDCCH iterations, neither being linked for PDCCH iterations, one being linked and the other not for PDCCH iterations, or other conditions for the set of control channel candidates.

[0189] In some cases, the conditions for sharing the search space may be based on condition 410, which specifies the conditions for the search space set. Additional or alternative conditions for sharing the search space may be configured separately from condition 410, such as through RRC signaling, system information, or downlink control information, or any combination thereof. For example, the conditions may be preconfigured, and UE115-a may identify which set of control channel candidates can be used for sharing the search space, based on whether a set of control channel candidates is configured for PDCCH iterations and the search space sharing conditions.

[0190] In some cases, shared search space may be supported between a bound set and an unbound set of control channel candidates. For example, shared search space may be applicable between a first set of PDCCH candidates and a second set of PDCCH candidates. The first set of PDCCH candidates is bound for PDCCH iterations, and the second set of PDCCH candidates is not bound for PDCCH iterations, but a candidate or pair of bound candidates associated with the first scheduled cell may be used to receive PDCCH signaling for the second scheduled cell. For example, UE115-a may receive PDCCH signaling for the second scheduled component carrier using one or more bound PDCCH candidates associated with the first scheduled component carrier in the first search space set, or using one or more bound PDCCH candidates in the second search space set. Similarly, a candidate associated with the second scheduled cell in any of the bound search space sets may be used to receive PDCCH for the first scheduled cell.

[0191] In some other examples, search space sharing may be applicable between two sets of PDCCH candidates, both of which are linked for PDCCH iterations, or between two sets of PDCCH candidates, neither of which are linked for PDCCH iterations. For example, search space sharing may not be supported between a first set of PDCCH candidates and a second set of PDCCH candidates. However, search space sharing may be supported between a first set of PDCCH candidates and a third set of PDCCH candidates used to schedule a third cell or a third component carrier, where the third set of PDCCH candidates is configured for PDCCH iterations spanning the first and second search space sets. In this example, search space sharing may also be supported between a second set of PDCCH candidates and a fourth set of PDCCH candidates associated with a fourth scheduled cell, where the fourth set of PDCCH candidates is not linked or configured for PDCCH iterations. However, a candidate or pair of candidates associated with a first scheduled cell in one or two linked search space sets does not have to be used to receive PDCCH for a second scheduled cell. Similarly, a candidate associated with a second scheduled cell in any of the linked search space sets does not have to be used to receive PDCCH signaling for a first scheduled cell.

[0192] In some other examples, search space sharing may apply between candidates in a given set of search spaces, but not to associated candidates. For example, a candidate in a given set of search spaces related to a first scheduled component carrier may be used to receive PDCCH signaling related to a second scheduled component carrier. However, two associated candidates in two sets of search spaces related to a first scheduled cell may not be used to receive PDCCH signaling related to a second scheduled cell. For example, if control channel candidates exist in a first set of search spaces, a first set of control channel candidates related to a first scheduling cell in the first set of search spaces may be used to receive PDCCH signaling related to a second scheduled component carrier. However, a third set of control channel candidates in a second set of search spaces associated with the first set of control channel candidates may not be used to receive PDCCH signaling related to a second scheduled component carrier.

[0193] In some cases, search space sharing may not apply to candidates in the monitoring opportunities of the first or second search space set. For example, a control channel candidate associated with the first or second scheduled component carrier, or any other scheduled component carrier present in the monitoring opportunities of the first or second search space set, may not support search space sharing.

[0194] Based on the search space sharing conditions, UE115-a may monitor control channel candidates for control signaling in a first set of search spaces, a second set of search spaces, or both. Based on the search space sharing conditions, UE115-a may monitor a first set of control channel candidates, a second set of control channel candidates, or both for a first control message 415-a, a second control message 415-b, or both.

[0195] In the first example, the search space sharing condition may support search space sharing between associated and unassociated control channel candidates. For example, UE115-a may receive a first control message 415-a on a first decoding candidate in a first search space set of a first set of control channel decoding candidates related to scheduling a first component carrier, the first control message 415-a scheduling a second component carrier. In some cases, UE115-a may receive a second control message 415-b on a second decoding candidate in a second search space set of a first set of control channel decoding candidates related to scheduling a first component carrier. The second control message 415-b may be an iteration of the first control message 415-a based on a control channel iteration configured for the first set of control channel decoding candidates and used to schedule a second scheduled component carrier. Thus, a PDCCH candidate associated with a first scheduled cell may be used to receive control signaling for a second scheduled cell. In some cases, control signaling for a second scheduled cell may be sent on both PDCCH candidates of a paired PDCCH candidate. In some other cases, search space sharing may be applicable between candidates in a given set of search spaces, but not to paired candidates. For example, in some cases, UE115-a may only receive the first control message 415-a on the first decoded candidate in the first set of search spaces, because search space sharing may not be supported for the paired second decoded candidate in the second set of search spaces.

[0196] In some examples, the search space sharing condition may support search space sharing between two sets of PDCCH candidates that are both linked, or between two sets of PDCCH candidates that are neither linked, but does not support search space sharing between a linked set of PDCCH candidates and an unlinked set of PDCCH candidates. For example, the first set of control channel decoding candidates does not have to be used to receive control signaling for a second scheduled cell because the first set of control channel decoding candidates is linked for a PDCCH iteration, while the second set of control channel candidates is not. However, the first decoding candidate of the first set of control channel decoding candidates may be used to receive a first control message 415-a scheduling a third component carrier if a third set of control channel decoding candidates related to a third component carrier is linked for a control channel iteration (e.g., across the first and second search space sets).

[0197] In some cases, shared search space may not be supported for any candidate in the monitoring opportunities of either of the two sets of search spaces. For example, shared search space may not be supported for the first set of control channel decoding candidates or the second set of control channel decoding candidates, or for control channel decoding candidates related to any other cell in the first or second set of search spaces.

[0198] In some cases, UE115-a may send signaling indicating UE capability to support search space sharing. In some cases, UE115-a may indicate support for uplink search space sharing, downlink search space sharing, or both. In some cases, UE capability may indicate that UE115-a supports search space sharing applicable to unbound sets of search spaces (e.g., not configured for PDCCH iterations). In this example, UE115-a may send additional UE capability, which may indicate whether UE115-a supports search space sharing in the presence of PDCCH iterations (e.g., bound candidates). For example, UE115-a may indicate whether UE115-a can support search space sharing when no control channel iterations are configured. In addition, UE115-a may indicate whether UE115-a can support search space sharing when control channel iterations are configured. This may provide some granularity for supporting search space sharing at different levels of complexity. Therefore, some less capable UE115s may support search space sharing in certain situations (e.g., situations of low complexity). In some cases, UE115-a may indicate a capability of UE115-a corresponding to whether UE115-a is capable of supporting search space sharing for any set of search spaces, regardless of the control channel iteration conditions. For example, instead of a high level of granularity for search space sharing capability, UE115-a may indicate a single UE capability corresponding to whether UE115-a supports search space sharing.

[0199] In some cases, the network may be configured to enable or disable search space sharing. For example, base station 105-a may send RRC signaling to enable or disable (e.g., switch) the search space sharing condition. The search space sharing condition may be enabled or disabled per cell group, per scheduling cell, per pair of scheduled cells, per search space set, or any combination thereof. To enable or disable search space sharing on a per-cell group basis, base station 105-a may enable or disable search space sharing for each master cell group or secondary cell group in a dual connectivity scheme, or for one or more component carriers in a carrier aggregation scheme. Per-cell group switching may apply to all component carriers. For example, when configured for cross-carrier scheduling, component carriers may be scheduled from the same scheduling cell and may have the same DCI size.

[0200] To enable or disable search space sharing for each scheduling cell, the toggle can be applied to all cells configured to be scheduled from the scheduling cell. For example, the DCI size for scheduled cells may be the same. To enable or disable search space sharing for each pair of scheduled cells, the toggle can be applied to the pair of scheduled cells (for example, when both cells are scheduled from the same scheduling cell and have the same DCI size). To enable or disable search space sharing for a set of search spaces (for example, for individual candidates or unassociated candidates) or for a pair of associated search space sets (for example, for associated candidates), the toggle can be applied to candidates in a set of search spaces, or to associated candidates in an associated search space set for a scheduled cell in an opportunity to monitor a set of search spaces or an opportunity to monitor an associated search space set.

[0201] Figure 5 shows an example of a resource condition 500 that supports a technique for sharing a search space for control channel iteration, according to an aspect of this disclosure. In some examples, the resource condition 500 may implement or be implemented by a wireless communication system 100, resource condition 200, resource condition 300, wireless communication system 400, or any combination thereof. For example, the resource condition 500 may be an example of a resource condition between the UE 115 and the base station 105 that supports a search space sharing and control channel iteration technique, as described with reference to Figures 1 to 4.

[0202] The UE115 and base station 105 may support techniques for search space sharing and control channel iteration. Specifically, the UE115 and base station 105 of the wireless communication system 400 may support techniques and configurations that enable multiple search space sets for a scheduled component carrier to be linked for control channel iteration, while also supporting search space sharing among control channel decoding candidates in one or more search space sets.

[0203] In the example of resource condition 500, the first search space set 505 in the first monitoring opportunity and the second search space set 510 in the second monitoring opportunity may include sets of control channel decoding candidates corresponding to four different scheduled cells. For example, each search space set may include one or more control channel decoding candidates corresponding to a first scheduled component carrier (e.g., CC0 with a CIF value of 0), a second scheduled component carrier (e.g., CC1 with a CIF value of 1), a third scheduled component carrier (e.g., CC2 with a CIF value of 2), and a fourth scheduled component carrier (e.g., CC3 with a CIF value of 3).

[0204] A first set of control channel candidates associated with CC0 may be configured for control channel iterations spanning a first search space set 505 and a second search space set 510. For example, control channel candidate 515-a may be associated with control channel candidate 520-a, and control messages received on control channel candidate 515-a may be duplicated so that iterations of control messages are received on control channel candidate 520-a. In some cases, a third set of control channel candidates associated with CC2 may also be configured for control channel iterations, and control channel candidate 515-c may be associated with control channel candidate 520-c.

[0205] A second set of control channel candidates associated with CC1 may not be linked or configured for control channel iteration. For example, control channel candidates 515-b and 520-b may be unlinked or separate control channel candidates. In some cases, a fourth set of control channel candidates associated with CC3 may also be linked, and control channel candidates 515-d and 520-d may each be used for control signaling for CC3, although control channel candidates 515-d and 520-d may be separate or unlinked.

[0206] UE115 may identify search space sharing conditions, which may indicate how search space sharing may or may not be implemented for different control channel candidates 515 and 520.

[0207] In the first example, search space sharing may be supported between an associated set and an unassociated set of control channel candidates. For example, search space sharing may be applicable between a first set of control channel candidates associated with CC0 and a second set of control channel candidates associated with CC1. For example, control channel candidate 515-a may be used to receive control signaling for CC1. In some cases, iterations of control signaling for CC1 may be received on control channel candidate 520-a. In some cases, control channel candidate 515-b or control channel candidate 520-b may be used to receive control signaling for CC0.

[0208] In some cases, regardless of which scheduled cell it is, search space sharing may be applied among candidates in a given set of search spaces, but not to the coupled candidates. For example, if control channel candidate 515-a is used to receive control signaling for CC1, the coupled candidate (e.g., control channel candidate 520-a) may not be used for the iteration of the control signaling. This technique can reduce the number of blind decodings performed by UE115, because UE115 does not have to perform additional blind decodings individually for the coupled candidates for each possible component carrier, nor does it have to perform additional blind decodings to perform soft synthesis of the coupled control channel candidates.

[0209] In the second example, search space sharing may apply to two sets of control channel candidates, where both are either linked for a control channel iteration or neither is linked for a control channel iteration. For example, search space sharing is applicable between scheduled cells CC0 and CC2 (e.g., for each pair of linked candidates in two linked search space sets), and between scheduled cells CC1 and CC3 (e.g., for each individual candidate in either of the SS sets). In this example, search space sharing may not be applicable between CC0 and CC1, between CC0 and CC3, between CC2 and CC1, or between CC2 and CC3.

[0210] In the second example, search space sharing may be used between a first set of control channel candidates associated with CC0 and a third set of control channel candidates associated with CC2. In this example, control signaling for CC0 may be received on control channel candidate 515-c, control channel candidate 520-c, or both. Similarly, control signaling for CC2 may be received on control channel candidate 515-a, control channel candidate 520-a, or both. For example, iterations of control signaling may be received on both associated control channel candidates. In some other examples, control signaling may be received on only one of the associated control channel candidates. A candidate or pair of associated candidates associated with a first scheduled cell (e.g., CC0) in one or two linked search space sets (e.g., a first search space set 505 and a second search space set 510) does not have to be used to receive a PDCCH for a second scheduled cell (e.g., CC1), but that candidate or pair of associated candidates may be used to receive a PDCCH for a third scheduled cell (e.g., CC2).

[0211] In the second example, search space sharing may also be used for a second set of control channel candidates associated with CC1 and a third set of control channel candidates associated with CC3. For example, control signaling for CC3 may be received on control channel candidate 515-b or control channel candidate 520-b, and control signaling for CC1 may be received on control channel candidate 515-d or control channel candidate 520-d. A control channel candidate associated with a second scheduled cell (e.g., CC1) in either the first search space set 505 or the second search space set 510 does not have to be used to receive a PDCCH for a first scheduled cell (e.g., CC0), but may be used to receive a PDCCH for a fourth scheduled cell (e.g., CC3).

[0212] In some cases, search space sharing may not apply to candidates in the monitoring opportunities of the first search space set 505 or the second search space set 510. For example, neither control channel candidate 515 nor control channel candidate 520 may support search space sharing.

[0213] Based on the search space sharing conditions, UE115 may monitor control channel candidates for control signaling in a first set of search spaces, a second set of search spaces, or both. Based on the search space sharing conditions, UE115 may monitor a first set of control channel candidates (e.g., corresponding to CC0) or a second set of control channel candidates (e.g., corresponding to CC1), or both, for a first control message, a second control message, or both.

[0214] Figure 6 shows an example of process flow 600 supporting a technique for sharing a search space for control channel iterations according to aspects of the present disclosure. In some examples, process flow 600 implements, or may be implemented by, a wireless communication system 100, resource condition 200, resource condition 300, wireless communication system 400, resource condition 500, or any combination thereof. For example, as described with reference to Figures 1 to 5, process flow 600 may show that UE115-b receives a scheduling condition for cross-carrier scheduling of a first component carrier, receives at least one iteration of a control message according to the scheduling condition, and performs communication scheduled by at least one iteration of the control message via the first component carrier.

[0215] In some cases, the process flow 600 may include UE115-b and base station 105-b, which may be examples of corresponding devices as described herein. In particular, the UE115-b and base station 105-b shown in Figure 6 may include the example of UE115-a and base station 105-a shown in Figure 4. In some cases, base station 105-b may be an example of an access network entity 140 as described herein.

[0216] In some examples, the actions shown in process flow 600 may be performed by hardware (including, for example, circuits, processing blocks, logic components, and other components), code executed by a processor (including, for example, software), or any combination thereof. The following alternative examples may be implemented in which some steps are performed in a different order than described, or are not performed at all. In some cases, the steps may include additional features not mentioned below, or further steps may be added.

[0217] In some cases, at 605, UE 115-b may transmit a UE capability indication for search space sharing to base station 105-b. In some cases, the UE capability indication may indicate that the UE is capable of search space sharing among sets of control channel decoding candidates that are not coupled for control channel iterations. In some cases, the UE capability indication may further indicate that the UE is capable of search space sharing among sets of control channel decoding candidates that are coupled for control channel iterations. In some cases, this indication may indicate that the UE is capable of search space sharing related to control channel iterations (whether, for example, the control channel decoding candidates are configured for control channel iterations).

[0218] In 610, UE115-b may receive control signaling from base station 105-b indicating a first search space set and a second search space set, where a first set of control channel decoding candidates related to scheduling a first component carrier (e.g., CC0) is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier (e.g., CC1) is not coupled across the first and second search space sets. In some cases, UE115-b may receive signaling that constitutes control channel iterations in the same control signaling or in a different control signaling.

[0219] In 615, UE115-b may identify a search space sharing condition. For example, UE115-b may identify a search space sharing condition that indicates how search space sharing may or may not be implemented for different control channel candidates corresponding to the first and second scheduled cells. UE115-b may identify a search space sharing condition based on whether a first set of control channel decoding candidates related to scheduling the first component carrier is tied together for control channel iterations spanning the first and second search space sets, and whether a second set of control channel decoding candidates related to scheduling the second component carrier is not tied together across the first and second search space sets. UE115-b may monitor the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, according to the search space sharing condition.

[0220] Under the first condition, search space sharing may be supported between an associated set of control channel candidates and an unassociated set. For example, search space sharing may be applicable between a first set of control channel candidates associated with CC0 and a second set of control channel candidates associated with CC1. In the first example of the first condition, UE115-b may receive a first control message scheduling a second component carrier on the first decoder candidate of the first search space set of the first set of control channel decoder candidates, based on a search space sharing condition indicating that search space sharing is configured for a first set of control channel decoder candidates and a second set of control channel decoder candidates. In the second example of the first condition, UE115-b may receive a first control message scheduling a first component carrier on the first decoder candidate of the second set of control channel decoder candidates, based on a search space sharing condition indicating that search space sharing is configured for a first set of control channel decoder candidates and a second set of control channel decoder candidates.

[0221] In some cases of the first condition, search space sharing may be applied to coupled candidates. In this example, UE115-b may receive a first control message iteration scheduling a second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates related to scheduling a first component carrier, based on the search space sharing condition and the fact that a first set of control channel decoding candidates is coupled for control channel iterations spanning a first search space set and a second search space set.

[0222] In some cases of the first condition, search space sharing may apply between candidates within a single set of search spaces, but not to linked candidates in other search spaces. For example, if a first decoding candidate is used to receive control signaling for CC1, a second (e.g., linked) candidate may not be used to receive iterations of the control signaling.

[0223] Under the second condition, search space sharing can be applied to two sets of control channel candidates, either both being linked for control channel iterations, or both being unlinked for control channel iterations. For example, search space sharing is applicable between two scheduled cells that have sets of control channel decoding candidates, both configured for PDCCH iterations. Alternatively, search space sharing is applicable between two scheduled cells that have sets of control channel decoding candidates that are not linked for PDCCH iterations.

[0224] In the first example of the second condition, UE115-b may receive a first control message scheduling a third component carrier on a first decoder candidate in the first search space set of a first set of control channel decoder candidates related to scheduling a first component carrier, based at least in part on the search space sharing condition, and the search space sharing condition indicates that the first set of control channel decoder candidates related to scheduling a first component carrier is configured for search space sharing, based on the fact that the first set of control channel decoder candidates related to scheduling a first component carrier is linked for control channel iterations spanning the first and second search space sets, and that the third set of control channel decoder candidates related to scheduling a third component carrier is linked for control channel iterations spanning the first and second search space sets. In this example, both the first set of decoder candidates and the third set of decoder candidates may be configured for control channel iterations, so search space sharing between the first set of control channel decoder candidates and the second set of control channel decoder candidates may be supported. In some cases, search space sharing can also be applied to iterative or linked candidates. For example, UE115-b may receive an iteration of a first control message, scheduling a third component carrier on a second decoding candidate in a second search space set, on a first set of control channel decoding candidates related to scheduling a first component carrier.

[0225] In a second example of the second condition, UE115-b may receive a first control message scheduling a third component carrier on a first decoding candidate in the first search space set of a second set of control channel decoding candidates related to scheduling a second component carrier, based on the search space sharing condition, where the second set of control channel decoding candidates related to scheduling a second component carrier is configured for search space sharing, based on the fact that the second set of control channel decoding candidates is not linked across the first and second search space sets, and the third set of control channel decoding candidates related to scheduling a third component carrier is not linked across the first and second search space sets. A second example of the second condition may be an example of search space sharing between unlinked sets of control channel candidates.

[0226] In some cases, search space sharing may not apply to candidates in monitoring opportunities in the first or second search space set. For example, UE115-b may identify that the search space sharing condition indicates that no search space sharing is established between the first set of candidates and the second set of candidates, based on the fact that the first set of control channel decoding candidates are linked for control channel iterations spanning the first and second search space sets, and the second set of control channel candidates are not linked for control channel iterations spanning the first and second search space sets. In some cases, UE115-b may identify that the search space sharing condition indicates that no search space sharing is established for any decoding candidates in the first and second search space sets.

[0227] In some cases, base station 105-b may transmit signaling to enable or disable search space sharing. For example, UE115-b may receive a second control signaling from base station 105-b to enable or disable the search space sharing condition. In some cases, UE115-b may receive a second control signaling to enable or disable the search space sharing condition for one or more cell groups, one or more component carriers containing a set of control channel decoding candidates configured for the UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof. In some cases, the second control signaling may be transmitted via RRC signaling.

[0228] Figure 7 shows a block diagram 700 of a device 705 supporting a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. Device 705 may be an example of an aspect of UE115 as described herein. Device 705 may include a receiver 710, a transmitter 715, and a communications manager 720. Device 705 may also include a processor. Each of these components may communicate with one another (for example, via one or more buses).

[0229] The receiver 710 may provide means for receiving information such as packets related to various information channels (e.g., control channels, data channels, information channels for techniques for sharing search space for control channel iterations), user data, control information, or any combination thereof. The information may be passed to other components of device 705. The receiver 710 may utilize a single antenna or a set of multiple antennas.

[0230] The transmitter 715 may provide means for transmitting signals generated by other components of device 705. For example, the transmitter 715 may transmit information such as packets related to various information channels (e.g., control channels, data channels, information channels for techniques for sharing search space for control channel iterations), user data, control information, or any combination thereof. In some examples, the transmitter 715 may be placed juxtaposed with the receiver 710 in the transceiver module. The transmitter 715 may utilize a single antenna or a set of multiple antennas.

[0231] The communication manager 720, receiver 710, transmitter 715, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the techniques for sharing a search space for control channel iterations as described herein. For example, the communication manager 720, receiver 710, transmitter 715, or various combinations thereof or components thereof may support a method for performing one or more of the functions described herein.

[0232] In some examples, the communications manager 720, the receiver 710, the transmitter 715, or various combinations or components thereof may be implemented in hardware (for example, in a communications management circuit). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as a means for performing, or otherwise supporting, the functions described herein. In some examples, a processor and memory coupled to the processor may be configured to perform one or more of the functions described herein (for example, by the processor executing instructions stored in the memory).

[0233] As an addition or alternative, in some examples, the communications manager 720, receiver 710, transmitter 715, or various combinations or components thereof may be implemented in code executed by a processor (for example, as communications management software or firmware). When implemented in code executed by a processor, the functions of the communications manager 720, receiver 710, transmitter 715, or various combinations or components thereof may be performed by a general-purpose processor, DSP, central processing unit (CPU), ASIC, FPGA, or any combination thereof or other programmable logic device (for example, configured as a means for performing or otherwise supporting the functions described herein).

[0234] In some examples, the communications manager 720 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with the receiver 710, the transmitter 715, or both. For example, the communications manager 720 may receive information from the receiver 710 and send information to the transmitter 715, or be integrated with the receiver 710, the transmitter 715, or both to receive information, transmit information, or perform various other operations as described herein.

[0235] The communications manager 720 may support wireless communications in the UE according to the examples disclosed herein. For example, the communications manager 720 may be configured, or otherwise support, for receiving control signaling from a base station or access network entity indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The communication manager 720 is configured, or may otherwise support, means for identifying search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on control signaling, or based on whether a first set of control channel decoding candidates related to scheduling a first component carrier is linked for control channel iterations spanning a first and second search space set, and whether a second set of control channel decoding candidates related to scheduling a second component carrier is not linked across the first and second search space sets. The communication manager 720 is configured, or may otherwise support, means for monitoring a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing conditions.

[0236] By including or configuring a communications manager 720 according to the examples described herein, device 705 (e.g., a processor controlling a receiver 710, a transmitter 715, a communications manager 720, or a combination thereof, or otherwise coupled thereto) may support improved techniques for cross-carrier scheduling. Specifically, the techniques described herein may enable the use of PDCCH iterations in the context of shared search space for cross-carrier scheduling. By enabling both shared search space and PDCCH iterations, the techniques described herein may improve the transmission diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, which may enable more efficient and widespread use of cross-carrier scheduling.

[0237] Figure 8 shows a block diagram 800 of device 805 supporting a technique for sharing a search space for control channel iterations according to an aspect of the present disclosure. Device 805 may be an example of an aspect of device 705 or UE115 as described herein. Device 805 may include a receiver 810, a transmitter 815, and a communications manager 820. Device 805 may also include a processor. Each of these components may communicate with one another (for example, via one or more buses).

[0238] Receiver 810 may provide means for receiving information such as packets related to various information channels (e.g., control channels, data channels, information channels for techniques for sharing search space for control channel iterations), user data, control information, or any combination thereof. The information may be passed to other components of device 805. Receiver 810 may utilize a single antenna or a set of multiple antennas.

[0239] Transmitter 815 may provide means for transmitting signals generated by other components of device 805. For example, transmitter 815 may transmit information such as packets related to various information channels (e.g., control channels, data channels, information channels for techniques for sharing search space for control channel iterations), user data, control information, or any combination thereof. In some examples, transmitter 815 may be placed juxtaposed with receiver 810 in a transceiver module. Transmitter 815 may utilize a single antenna or a set of multiple antennas.

[0240] Device 805, or various components thereof, may be examples of means for performing various embodiments of techniques for sharing search space for control channel iterations, as described herein. For example, communication manager 820 may include a search space condition component 825, a search space sharing condition component 830, a decoded candidate monitoring component 835, or any combination thereof. Communication manager 820 may be an example of an embodiment of communication manager 720 as described herein. In some examples, communication manager 820, or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with receiver 810, transmitter 815, or both. For example, communication manager 820 may receive information from receiver 810 and send information to transmitter 815, or be integrated with receiver 810, transmitter 815, or both, to receive information, transmit information, or perform various other operations as described herein.

[0241] The communications manager 820 may support wireless communications in the UE according to the examples disclosed herein. The search space condition component 825 is configured, or may otherwise support, means for receiving control signaling from a base station or access network entity indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The search space sharing condition component 830 is configured, or may otherwise support, means for identifying search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on the control signaling. The decoding candidate monitoring component 835 is configured as a means for monitoring a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing conditions, or may support it in other ways.

[0242] Figure 9 shows a block diagram 900 of a communications manager 920 supporting a technique for sharing search space for control channel iterations, according to an aspect of the present disclosure. The communications manager 920 may be an example of communications manager 720, communications manager 820, or both, as described herein. The communications manager 920, or various components thereof, may be examples of means for performing various aspects of the technique for sharing search space for control channel iterations, as described herein. For example, the communications manager 920 may include a search space condition component 925, a search space sharing condition component 930, a decoded candidate monitoring component 935, a capability component 940, a search space sharing switching component 945, or any combination thereof. Each of these components may communicate with one another directly or indirectly (for example, via one or more buses).

[0243] The communication manager 920 may support wireless communication in the UE according to the examples disclosed herein. The search space condition component 925 is configured, or may otherwise support, means for receiving control signaling from a base station or access network entity indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The search space sharing condition component 930 is configured, or may otherwise support, means for identifying search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on control signaling. The decoding candidate monitoring component 935 is configured as a means for monitoring a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing conditions, or may support it in other ways.

[0244] In some examples, to support the identification of search space shared conditions, the search space condition component 925 may be configured as a means for receiving a control signaling or a second control signaling indicating a search space shared condition, or may support it otherwise.

[0245] In some examples, to support monitoring, the decryption candidate monitoring component 935 may be configured, or otherwise support this, as a means for receiving a first control message that schedules a second component carrier on a first decryption candidate in the first search space set of the first set of control channel decryption candidates, relating to scheduling a first component carrier on a first decryption candidate in the first search space set of the first set of control channel decryption candidates, based on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decryption candidates and a second set of control channel decryption candidates.

[0246] In some examples, the decoding candidate monitoring component 935 may be configured, or otherwise support, to receive iterations of a first control message scheduling a second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates, relating to scheduling a first component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates, based on a search space sharing condition and the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set.

[0247] In some examples, the decryption candidate monitoring component 935 may be configured, or otherwise support, to receive a first control message scheduling a first component carrier on the first decryption candidate of the second set of control channel decryption candidates, relating to scheduling a second component carrier in the first set of control channel decryption candidates, based on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decryption candidates and a second set of control channel decryption candidates.

[0248] In some examples, to support monitoring, the decryption candidate monitoring component 935 is configured, or may otherwise support, a means for receiving a first control message for scheduling a third component carrier on a first decryption candidate in a first search space set of a first set of control channel decryption candidates related to scheduling a first component carrier, based on a search space sharing condition, where the first set of control channel decryption candidates related to scheduling a first component carrier is configured for search space sharing, based on the first set of control channel decryption candidates being linked for control channel iterations spanning a first and second search space set, and a third set of control channel decryption candidates related to scheduling a third component carrier being linked for control channel iterations spanning a first and second search space set.

[0249] In some examples, the decoding candidate monitoring component 935 may be configured, or otherwise support, for receiving iterations of a first control message scheduling a third component carrier on a second decoding candidate in a second search space set of a first set of control channel decoding candidates related to scheduling a first component carrier.

[0250] In some examples, to support monitoring, the decryption candidate monitoring component 935 is configured, or may otherwise support, a means for receiving a first control message scheduling a third component carrier on a first decryption candidate in a first search space set of a second set of control channel decryption candidates related to scheduling a second component carrier, based on a search space sharing condition, where the search space sharing condition indicates that the second set of control channel decryption candidates related to scheduling a second component carrier is configured for search space sharing, based on the conditions that the second set of control channel decryption candidates is not linked across the first and second search space sets, and the third set of control channel decryption candidates related to scheduling a third component carrier is not linked across the first and second search space sets.

[0251] In some examples, to support the identification of search space conditions, the search space sharing condition component 930 may be configured, or otherwise support, to identify that the search space sharing condition indicates that no search space sharing is established between the first set of candidate and the second set of candidate, based on the fact that a first set of control channel decoding candidates is bound together for control channel iterations spanning the first and second search space sets, and a second set of control channel candidate candidates is not bound together for control channel iterations spanning the first and second search space sets.

[0252] In some examples, to support identifying search space sharing conditions, the search space sharing condition component 930 may be configured, or otherwise support, for identifying that the search space sharing condition indicates that no search space sharing is established for any decoding candidates in the first and second search space sets.

[0253] In some examples, to support the identification of search space sharing conditions, the capability component 940 may be configured as a means for transmitting an indication of UE capability for search space sharing to a base station or access network entity, or may otherwise support it. In some examples, to support the identification of search space sharing conditions, the capability component 940 may be configured as a means for receiving a control signaling or a second control signaling indicating a search space sharing condition based on the UE capability for search space sharing, or may otherwise support it.

[0254] In some examples, the UE capability indication shows that the UE is capable of sharing the search space among sets of control channel decoding candidates that are not tied together for control channel iterations.

[0255] In some examples, the indication of UE capability further shows that the UE is capable of sharing the search space among sets of control channel decoding candidates that are linked together for control channel iterations.

[0256] In some examples, the UE capability indication shows that the UE is capable of sharing the search space related to control channel iterations.

[0257] In some examples, the search space switching component 945 may be configured, or otherwise support, for receiving a second control signaling from a base station or access network entity to enable or disable the search space sharing condition.

[0258] In some examples, to support receiving a second control signaling, the search space sharing switching component 945 may be configured, or otherwise support, for receiving a second control signaling to enable or disable a search space sharing condition for one or more cell groups, one or more component carriers including a set of control channel decoding candidates configured for a UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof.

[0259] In some examples, to support receiving a second control signaling, the search space sharing switching component 945 may be configured as a means for receiving the second control signaling via a wireless resource control signaling, or may support it otherwise.

[0260] Figure 10 shows a diagram of system 1000 including a device 1005 that supports a technique for sharing a search space for control channel iteration according to an aspect of the present disclosure. Device 1005 may be, or include, an example of a component of device 705, device 805, or UE 115 as described herein. Device 1005 may communicate wirelessly with one or more base stations 105, UE 115, access network entities 140, or any combination thereof. Device 1005 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, such as a communications manager 1020, an input / output (I / O) controller 1010, a transceiver 1015, an antenna 1025, a memory 1030, a code 1035, and a processor 1040. These components may communicate electronically over one or more buses (e.g., bus 1045), or they may be coupled otherwise (e.g., operationally, communicatively, functionally, electronically, electrically).

[0261] The I / O controller 1010 may manage input and output signals for device 1005. The I / O controller 1010 may also manage peripheral devices not integrated into device 1005. In some cases, the I / O controller 1010 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 1010 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 1010 may represent, or interact with, a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 1010 may be implemented as part of a processor, such as processor 1040. In some cases, a user may interact with device 1005 via the I / O controller 1010 or via hardware components controlled by the I / O controller 1010.

[0262] In some cases, device 1005 may include a single antenna 1025. However, in some other cases, device 1005 may have two or more antennas 1025 that may be capable of simultaneously transmitting or receiving multiple wireless transmissions. Transceiver 1015 may communicate bidirectionally via one or more antennas 1025, a wired link, or a wireless link, as described herein. For example, transceiver 1015 may represent a wireless transceiver and communicate bidirectionally with another wireless transceiver. Transceiver 1015 may also include a modem for modulating packets, providing the modulated packets to one or more antennas 1025 for transmission, and demodulating packets received from one or more antennas 1025. Transceiver 1015, or transceiver 1015 and one or more antennas 1025, may be examples of transmitters 715, 815, 710, 810, or any combination thereof or components thereof, as described herein.

[0263] Memory 1030 may include random access memory (RAM) and read-only memory (ROM). Memory 1030 may store computer-readable, computer-executable code 1035, which, when executed by processor 1040, includes instructions causing device 1005 to perform various functions described herein. Code 1035 may be stored in a non-temporary computer-readable medium such as system memory or another type of memory. In some cases, code 1035 may not be directly executable by processor 1040 but may cause the computer to perform the functions described herein (for example, when compiled and executed). In some cases, memory 1030 may include a basic I / O system (BIOS) that can control basic hardware or software operations, such as interaction with peripheral components or peripheral devices.

[0264] The processor 1040 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1040 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 1040. The processor 1040 may be configured to execute computer-readable instructions stored in memory (e.g., memory 1030) in order to cause device 1005 to perform various functions (e.g., functions or tasks that support techniques for sharing search space for control channel iterations). For example, device 1005 or a component of device 1005 may include the processor 1040 and memory 1030 coupled to the processor 1040, and the processor 1040 and memory 1030 may be configured to perform various functions described herein.

[0265] The communication manager 1020 may support wireless communications in the UE according to the examples disclosed herein. For example, the communication manager 1020 may be configured, or otherwise support, for receiving control signaling from a base station or access network entity indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The communication manager 1020 may be configured, or otherwise support, for identifying search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on the control signaling. The communication manager 1020 is configured, or may otherwise support, means for monitoring a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing conditions.

[0266] By including or configuring a communications manager 1020 according to the examples described herein, device 1005 may support improved techniques for cross-carrier scheduling. Specifically, the techniques described herein may enable the use of PDCCH iterations in the context of search space sharing for cross-carrier scheduling. By enabling both search space sharing and PDCCH iterations, the techniques described herein may improve the transmission diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, which may enable more efficient and widespread use of cross-carrier scheduling.

[0267] In some examples, the communications manager 1020 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with the transceiver 1015, one or more antennas 1025, or any combination thereof. Although the communications manager 1020 is shown as a separate component, in some examples, one or more functions described in relation to the communications manager 1020 may be supported or performed by the processor 1040, memory 1030, code 1035, or any combination thereof. For example, code 1035 may include instructions executable by the processor 1040 to cause device 1005 to perform various aspects of techniques for sharing a search space for control channel iterations as described herein, or the processor 1040 and memory 1030 may be otherwise configured to perform or support such operations.

[0268] Figure 11 shows a block diagram 1100 of a device 1105 that supports a technique for sharing a search space for control channel iteration, according to an aspect of the present disclosure. Device 1105 may be an example of an aspect of a base station 105 or access network entity 140 as described herein. Device 1105 may include a receiver 1110, a transmitter 1115, and a communications manager 1120. Device 1105 may also include a processor. Each of these components may communicate with one another (for example, via one or more buses).

[0269] Receiver 1110 may provide means for receiving information such as packets related to various information channels (e.g., control channels, data channels, information channels for techniques for sharing search space for control channel iterations), user data, control information, or any combination thereof. The information may be passed to other components of device 1105. Receiver 1110 may utilize a single antenna or a set of multiple antennas.

[0270] The transmitter 1115 may provide means for transmitting signals generated by other components of the device 1105. For example, the transmitter 1115 may transmit information such as packets, user data, control information, or any combination thereof related to various information channels (e.g., control channels, data channels, information channels regarding techniques for shared search spaces for control channel repetitions). In some examples, the transmitter 1115 may be co-located with the receiver 1110 within a transceiver module. The transmitter 1115 may utilize a single antenna or a set of multiple antennas.

[0271] The communication manager 1120, the receiver 1110, the transmitter 1115, or various combinations thereof or their various components may be examples of means for performing various aspects of techniques for shared search spaces for control channel repetitions as described herein. For example, the communication manager 1120, the receiver 1110, the transmitter 1115, or various combinations thereof or components may support a method for performing one or more of the functions described herein.

[0272] In some examples, the communication manager 1120, the receiver 1110, the transmitter 1115, or various combinations thereof or components may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gates or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting means for performing the functions described in this disclosure. In some examples, a processor and memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by the processor executing instructions stored in the memory).

[0273] As an addition or alternative, in some examples, the communications manager 1120, receiver 1110, transmitter 1115, or various combinations or components thereof may be implemented in code executed by a processor (for example, as communications management software or firmware). When implemented in code executed by a processor, the functions of the communications manager 1120, receiver 1110, transmitter 1115, or various combinations or components thereof may be performed by a general-purpose processor, DSP, CPU, ASIC, FPGA, or any combination thereof or other programmable logic device (for example, configured as a means for performing or otherwise supporting the functions described herein).

[0274] In some examples, the communications manager 1120 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with the receiver 1110, the transmitter 1115, or both. For example, the communications manager 1120 may receive information from the receiver 1110, send information to the transmitter 1115, or be integrated with the receiver 1110, the transmitter 1115, or both to receive information, transmit information, or perform various other operations as described herein.

[0275] The communication manager 1120 may support wireless communication at a base station in accordance with the examples disclosed herein. For example, the communication manager 1120 may be configured, or otherwise support, for transmitting control signaling to a UE indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The communication manager 1120 is configured, or may otherwise support, means for identifying a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on control signaling, or based on whether a first set of control channel decoding candidates related to scheduling a first component carrier is linked for control channel iterations spanning a first and second search space set, and whether a second set of control channel decoding candidates related to scheduling a second component carrier is not linked across the first and second search space sets. The communication manager 1120 is configured, or may otherwise support, means for sending a first control message corresponding to at least one of the first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing condition.

[0276] By including or configuring the communications manager 1120 according to the examples described herein, the device 1105 (e.g., a processor controlling the receiver 1110, transmitter 1115, communications manager 1120, or a combination thereof, or otherwise coupled thereto) may support improved techniques for cross-carrier scheduling. Specifically, the techniques described herein may enable the use of PDCCH iterations in the context of shared search space for cross-carrier scheduling. By enabling both shared search space and PDCCH iterations, the techniques described herein may improve the transmission diversity of control messages used for cross-carrier scheduling. Thus, the techniques described herein may improve the reliability of control signaling used for cross-carrier scheduling, which may enable more efficient and widespread use of cross-carrier scheduling.

[0277] Figure 12 shows a block diagram 1200 of device 1205 supporting a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. Device 1205 may be an example of an aspect of device 1105, base station 105, or access network entity 140 as described herein. Device 1205 may include a receiver 1210, a transmitter 1215, and a communications manager 1220. Device 1205 may also include a processor. Each of these components may communicate with one another (for example, via one or more buses).

[0278] Receiver 1210 may provide means for receiving information such as packets related to various information channels (e.g., control channels, data channels, information channels for techniques for sharing search space for control channel iterations), user data, control information, or any combination thereof. The information may be passed to other components of device 1205. Receiver 1210 may utilize a single antenna or a set of multiple antennas.

[0279] Transmitter 1215 may provide means for transmitting signals generated by other components of device 1205. For example, transmitter 1215 may transmit information such as packets related to various information channels (e.g., control channel, data channel, information channel for techniques for sharing search space for control channel iteration), user data, control information, or any combination thereof. In some examples, transmitter 1215 may be placed juxtaposed with receiver 1210 in a transceiver module. Transmitter 1215 may utilize a single antenna or a set of multiple antennas.

[0280] Device 1205, or various components thereof, may be examples of means for performing various embodiments of techniques for sharing search space for control channel iterations, as described herein. For example, communication manager 1220 may include a search space configuration component 1225, a search space sharing condition component 1230, a control message transmission component 1235, or any combination thereof. Communication manager 1220 may be an example of an embodiment of communication manager 1120 as described herein. In some examples, communication manager 1220 or various components thereof may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or in cooperation with receiver 1210, transmitter 1215, or both. For example, communication manager 1220 may receive information from receiver 1210 and send information to transmitter 1215, or be integrated with receiver 1210, transmitter 1215, or both, to receive information, transmit information, or perform various other operations as described herein.

[0281] The communication manager 1220 may support wireless communication at a base station in accordance with the examples disclosed herein. The search space configuration component 1225 is configured, or may otherwise support, for transmitting control signaling to the UE indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The search space sharing condition component 1230 is configured, or may otherwise support, for identifying search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on the control signaling. The control message transmission component 1235 is configured, or may otherwise support, a means for transmitting a first control message corresponding to a first set of control channel decoding candidates, a second set of control channel decoding candidates, or at least one control channel decoding candidate from both sets, according to the search space sharing condition.

[0282] Figure 13 shows a block diagram 1300 of a communications manager 1320 supporting a technique for sharing a search space for control channel iterations, according to an aspect of the present disclosure. The communications manager 1320 may be an example of communications manager 1120, communications manager 1220, or both, as described herein. The communications manager 1320, or various components thereof, may be examples of means for performing various aspects of the technique for sharing a search space for control channel iterations, as described herein. For example, the communications manager 1320 may include a search space configuration component 1325, a search space sharing condition component 1330, a control message transmission component 1335, a capability component 1340, a search space sharing switching component 1345, or any combination thereof. Each of these components may communicate with each other directly or indirectly (for example, via one or more buses).

[0283] The communication manager 1320 may support wireless communication at a base station in accordance with the examples disclosed herein. The search space configuration component 1325 is configured, or may otherwise support, for transmitting control signaling to the UE indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is linked for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not linked across the first and second search space sets. The search space sharing condition component 1330 is configured, or may otherwise support, for identifying search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on the control signaling. The control message transmission component 1335 is configured, or may otherwise support, a means for transmitting a first control message corresponding to a first set of control channel decoding candidates, a second set of control channel decoding candidates, or at least one control channel decoding candidate from both sets, according to the search space sharing condition.

[0284] In some examples, the search space configuration component 1325 is configured as a means for transmitting a control signaling or a second control signaling indicating a search space sharing condition, or may otherwise support it.

[0285] In some examples, to support transmission, the control message transmission component 1335 may be configured, or otherwise support it, as a means for transmitting a first control message that schedules a second component carrier on a first decoder in the first search space set of the first set of control channel decoder candidates, relating to scheduling a first component carrier on a first decoder in the first search space set of the first set of control channel decoder candidates, based on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decoder candidates and a second set of control channel decoder candidates.

[0286] In some examples, the control message sending component 1335 may be configured, or otherwise support, for sending an iteration of a first control message that schedules a second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates related to scheduling a first component carrier, based on a search space sharing condition and the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set.

[0287] In some examples, the control message sending component 1335 may be configured, or otherwise support, for sending a first control message that schedules a first component carrier on the first decoded candidate of the second set of control channel decoded candidates, relating to scheduling a second component carrier in the first set of control channel decoded candidates, based on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decoded candidates and a second set of control channel decoded candidates.

[0288] In some examples, to support transmission, the control message transmission component 1335 is configured, or may otherwise support, a means for transmitting a first control message that schedules a third component carrier on a first decoder candidate in a first search space set of a first set of control channel decoder candidates related to scheduling a first component carrier, based on a search space sharing condition, where the first set of control channel decoder candidates related to scheduling a first component carrier is configured for search space sharing, based on the first set of control channel decoder candidates related to scheduling a first component carrier being linked for control channel iterations spanning a first and second search space set, and a third set of control channel decoder candidates related to scheduling a third component carrier being linked for control channel iterations spanning a first and second search space set.

[0289] In some examples, the control message sending component 1335 is configured, or may otherwise support, for sending an iteration of a first control message scheduling a third component carrier on a second decoding candidate in a second search space set of a first set of control channel decoding candidates related to scheduling a first component carrier.

[0290] In some examples, to support transmission, the control message transmission component 1335 is configured, or may otherwise support, a means for transmitting a first control message scheduling a third component carrier on a first decoding candidate in a first search space set of a second set of control channel decoding candidates related to scheduling a second component carrier, based on a search space sharing condition, where the search space sharing condition indicates that the second set of control channel decoding candidates related to scheduling a second component carrier is configured for search space sharing, based on the conditions that the second set of control channel decoding candidates is not linked across the first and second search space sets, and the third set of control channel decoding candidates related to scheduling a third component carrier is not linked across the first and second search space sets.

[0291] In some examples, to support identifying search space sharing conditions, the search space sharing condition component 1330 may be configured, or otherwise support, to identify that the search space sharing condition indicates that no search space sharing is established between the first set of candidate and the second set of candidate, based on the fact that a first set of control channel decoding candidates is bound together for control channel iterations spanning the first and second search space sets, and a second set of control channel candidate candidates is not bound together for control channel iterations spanning the first and second search space sets.

[0292] In some examples, to support identifying search space sharing conditions, the search space sharing condition component 1330 may be configured, or otherwise support, for identifying that the search space sharing condition indicates that no search space sharing is established for any decoding candidates in the first and second search space sets.

[0293] In some examples, to support identifying search space sharing conditions, the capability component 1340 may be configured as, or otherwise support, means for receiving from the UE an indication of the UE's capabilities for search space sharing. In some examples, to support identifying search space sharing conditions, the capability component 1340 may be configured as, or otherwise support, means for transmitting control signaling or second control signaling indicating search space sharing conditions based on the UE's capabilities for search space sharing.

[0294] In some examples, the indication of the UE's capabilities indicates that the UE is capable of search space sharing between sets of control channel decoding candidates that are not associated for control channel repetition.

[0295] In some examples, the indication of the UE's capabilities further indicates that the UE is capable of search space sharing between sets of control channel decoding candidates that are associated for control channel repetition.

[0296] In some examples, the indication of the UE's capabilities indicates that the UE is capable of search space sharing related to control channel repetition.

[0297] In some examples, the search space sharing switching component 1345 may be configured as, or otherwise support, means for transmitting second control signaling to the UE to enable or disable search space sharing conditions.

[0298] In some examples, to support transmitting the second control signaling, the search space sharing switching component 1345 may be configured as, or otherwise support, means for transmitting second control signaling to enable or disable search space sharing conditions for one or more cell groups, one or more component carriers including sets of control channel decoding candidates configured for the UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof.

[0299] In some examples, to support the transmission of a second control signaling, the search space sharing switching component 1345 may be configured as a means for transmitting a second control signaling via a wireless resource control signaling, or may support it otherwise.

[0300] Figure 14 shows a diagram of a system 1400 including a device 1405 that supports a technique for sharing a search space for control channel iteration according to an aspect of the present disclosure. Device 1405 may be, or include, an example of a component of device 1105, device 1205, access network entity 140, or base station 105 as described herein. Device 1405 may communicate wirelessly with one or more base stations 105, UE 115, or any combination thereof. Device 1405 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, such as a communications manager 1420, a network communications manager 1410, a transceiver 1415, an antenna 1425, a memory 1430, a code 1435, a processor 1440, and an inter-station communications manager 1445. These components may communicate electronically over one or more buses (e.g., bus 1450) or may be coupled in other ways (e.g., operationally, communicatively, functionally, electronically, or electrically).

[0301] The network communication manager 1410 may manage communication with the core network 130 (for example, via one or more wired backhaul links). For example, the network communication manager 1410 may manage the transfer of data communications for one or more client devices such as UE 115.

[0302] In some cases, device 1405 may include a single antenna 1425. However, in some other cases, device 1405 may have two or more antennas 1425 that may be capable of simultaneously transmitting or receiving multiple wireless transmissions. Transceiver 1415 may communicate bidirectionally via one or more antennas 1425, a wired link, or a wireless link, as described herein. For example, transceiver 1415 may represent a wireless transceiver and communicate bidirectionally with another wireless transceiver. Transceiver 1415 may also include a modem for modulating packets and providing the modulated packets to one or more antennas 1425 for transmission, and for demodulating packets received from one or more antennas 1425. Transceiver 1415, or transceiver 1415 and one or more antennas 1425, may be examples of transmitters 1115, transmitters 1215, receivers 1110, receivers 1210, or any combination thereof or components thereof, as described herein.

[0303] Memory 1430 may include RAM and ROM. Memory 1430 may store computer-readable, computer-executable code 1435, which, when executed by processor 1440, includes instructions that cause device 1405 to perform various functions described herein. Code 1435 may be stored in a non-temporary computer-readable medium, such as system memory or another type of memory. In some cases, code 1435 may not be directly executable by processor 1440, but may cause the computer to perform the functions described herein (for example, when compiled and executed). In some cases, memory 1430 may include a BIOS that can control basic hardware or software operations, such as interaction with peripheral components or devices.

[0304] The processor 1440 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1440 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 1440. The processor 1440 may be configured to execute computer-readable instructions stored in memory (e.g., memory 1430) in order to cause device 1405 to perform various functions (e.g., functions or tasks that support techniques for sharing search space for control channel iterations). For example, device 1405 or a component of device 1405 may include the processor 1440 and memory 1430 coupled to the processor 1440, and the processor 1440 and memory 1430 may be configured to perform various functions described herein.

[0305] The inter-station communication manager 1445 may manage communication with other base stations 105 and may include a controller or scheduler for coordinating communication with the UE 115 in cooperation with other base stations 105. For example, the inter-station communication manager 1445 may coordinate scheduling for transmissions to the UE 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communication manager 1445 may provide an X2 interface within the LTE / LTE-A wireless communication network technology for communication between base stations 105.

[0306] The communication manager 1420 may support wireless communication at a base station in accordance with the examples disclosed herein. For example, the communication manager 1420 may be configured, or otherwise support, for transmitting to the UE control signaling indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The communication manager 1420 may be configured, or otherwise support, for identifying search space sharing conditions for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on the control signaling. The communication manager 1420 is configured, or may otherwise support, means for sending a first control message corresponding to a first set of control channel decoding candidates, a second set of control channel decoding candidates, or at least one control channel decoding candidate from both, according to the search space sharing conditions.

[0307] By including or configuring a communications manager 1420 according to the examples described herein, device 1405 may support techniques for improved cross-carrier scheduling. Specifically, the techniques described herein may enable the use of PDCCH iterations in the context of search space sharing for cross-carrier scheduling. By enabling both search space sharing and PDCCH iterations, the techniques described herein may improve the transmit diversity of control messages used for cross-carrier scheduling. Improved transmit diversity may lead to improved resource utilization of the device.

[0308] In some examples, the communications manager 1420 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with the transceiver 1415, one or more antennas 1425, or any combination thereof. Although the communications manager 1420 is shown as a separate component, in some examples, one or more functions described in relation to the communications manager 1420 may be supported or performed by the processor 1440, memory 1430, code 1435, or any combination thereof. For example, code 1435 may include instructions executable by the processor 1440 to cause device 1405 to perform various aspects of techniques for sharing search space for control channel iterations as described herein, or the processor 1440 and memory 1430 may be otherwise configured to perform or support such operations.

[0309] Figure 15 shows a flowchart illustrating Method 1500, which supports a technique for sharing a search space for control channel iterations, according to aspects of this disclosure. The operation of Method 1500 may be performed by a UE or a component thereof, as described herein. For example, the operation of Method 1500 may be performed by a UE 115, as described with reference to Figures 1 to 10. In some examples, the UE may execute a set of instructions to control a functional element of the UE to perform the described functions. Additional or alternative, the UE may perform aspects of the described functions using dedicated hardware.

[0310] In 1505, the method may include the step of receiving control signaling from a base station indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The operation of 1505 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1505 may be performed by a search space condition component 925 as described with reference to Figure 9.

[0311] In 1510, the method may include the step of identifying a search space shared condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on control signaling. The operation of 1510 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1510 may be performed by a search space shared condition component 930, as described with reference to Figure 9.

[0312] In 1515, the method may include the step of monitoring a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to a search space sharing condition. The operation of 1515 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1515 may be performed by a decoding candidate monitoring component 935, as described with reference to Figure 9.

[0313] Figure 16 shows a flowchart illustrating Method 1600, which supports a technique for sharing a search space for control channel iterations, according to aspects of this disclosure. The operation of Method 1600 may be performed by a UE or a component thereof, as described herein. For example, the operation of Method 1600 may be performed by a UE 115, as described with reference to Figures 1 to 10. In some examples, the UE may execute a set of instructions to control a functional element of the UE to perform the described functions. In addition or alternatively, the UE may perform aspects of the described functions using dedicated hardware.

[0314] In 1605, the method may include the step of receiving control signaling from a base station indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The operation of 1605 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1605 may be performed by a search space condition component 925 as described with reference to Figure 9.

[0315] In 1610, the method may include the step of identifying a search space shared condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on control signaling. The operation of 1610 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1610 may be performed by a search space shared condition component 930, as described with reference to Figure 9.

[0316] In 1615, the method may include the step of monitoring a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to a search space sharing condition. The operation of 1615 may be performed according to examples such as those disclosed herein. In some examples, the operation of 1615 may be performed by a decoding candidate monitoring component 935, as described with reference to Figure 9.

[0317] In 1620, the method may include receiving a first control message to schedule a second component carrier on a first decryption candidate in the first search space set of the first set of control channel decryption candidates, relating to scheduling a first component carrier on a first set of control channel decryption candidates based on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decryption candidates and a second set of control channel decryption candidates. The operation of 1620 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1620 may be performed by a decryption candidate monitoring component 935, as described with reference to Figure 9.

[0318] In 1625, the method may include receiving an iteration of a first control message that schedules a second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates, relating to scheduling a first component carrier on a first search space shared condition and that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set. The operation of 1625 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1625 may be performed by a decoding candidate monitoring component 935, as described with reference to Figure 9.

[0319] Figure 17 shows a flowchart illustrating Method 1700, which supports a technique for sharing a search space for control channel iterations, according to aspects of the present disclosure. The operation of Method 1700 may be performed by a UE or a component thereof, as described herein. For example, the operation of Method 1700 may be performed by a UE 115, as described with reference to Figures 1 to 10. In some examples, the UE may execute a set of instructions to control a functional element of the UE to perform the described functions. Additional or alternative, the UE may perform aspects of the described functions using dedicated hardware.

[0320] In 1705, the method may include the step of transmitting a UE capability indication for search space sharing to a base station. Operation of 1705 may be performed according to examples such as those disclosed herein. In some examples, aspects of operation of 1705 may be performed by capability component 940, as described with reference to Figure 9.

[0321] In 1710, the method may include the step of receiving control signaling from a base station indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The operation of 1710 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1710 may be performed by a search space condition component 925 as described with reference to Figure 9.

[0322] In 1715, the method may include the step of identifying a search space shared condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on control signaling. The operation of 1715 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1715 may be performed by a search space shared condition component 930, as described with reference to Figure 9.

[0323] In 1720, the method may include the step of monitoring a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to a search space sharing condition. The operation of 1720 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1720 may be performed by a decoding candidate monitoring component 935, as described with reference to Figure 9.

[0324] In 1725, the method may include the step of receiving a control signaling or a second control signaling indicating a search space sharing condition based on UE capability for search space sharing. Operation of 1725 may be performed according to examples such as those disclosed herein. In some examples, aspects of operation of 1725 may be performed by capability component 940, as described with reference to Figure 9.

[0325] Figure 18 shows a flowchart illustrating Method 1800, which supports a technique for sharing a search space for control channel iterations, according to aspects of this disclosure. The operation of Method 1800 may be performed by a UE or a component thereof, as described herein. For example, the operation of Method 1800 may be performed by a UE 115, as described with reference to Figures 1 to 10. In some examples, the UE may execute a set of instructions to control a functional element of the UE to perform the described functions. Additional or alternative, the UE may perform aspects of the described functions using dedicated hardware.

[0326] In 1805, the method may include the step of receiving control signaling from a base station indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The operation of 1805 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1805 may be performed by a search space condition component 925, as described with reference to Figure 9.

[0327] In 1810, the method may include the step of identifying a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on control signaling. The operation of 1810 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1810 may be performed by a search space sharing condition component 930, as described with reference to Figure 9.

[0328] In 1815, the method may include the step of receiving a second control signaling from a base station to enable or disable the search space sharing condition. Operation of 1815 may be performed according to examples such as those disclosed herein. In some examples, aspects of operation of 1815 may be performed by a search space sharing switching component 945, as described with reference to Figure 9.

[0329] In 1820, the method may include the step of monitoring a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to a search space sharing condition. The operation of 1820 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1820 may be performed by a decoding candidate monitoring component 935, as described with reference to Figure 9.

[0330] Figure 19 shows a flowchart illustrating method 1900 supporting a technique for sharing a search space for control channel iteration, according to aspects of this disclosure. The operation of method 1900 may be performed by a base station or a component thereof, such as an access network entity 140, as described herein. For example, the operation of method 1900 may be performed by base station 105, as described with reference to Figures 1 to 6 and Figures 11 to 14. In some examples, the base station may execute a set of instructions to control the functional elements of the base station to perform the functions described. In addition or alternatively, the base station may perform aspects of the functions described using dedicated hardware.

[0331] In 1905, the method may include the step of sending control signaling to the UE indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The operation of 1905 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1905 may be performed by a search space configuration component 1325 as described with reference to Figure 13.

[0332] In 1910, the method may include the step of identifying a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on control signaling. The operation of 1910 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1910 may be performed by a search space sharing condition component 1330, as described with reference to Figure 13.

[0333] In 1915, the method may include the step of sending a first control message corresponding to a first set of control channel decoding candidates, a second set of control channel decoding candidates, or at least one of both control channel decoding candidates, according to a search space sharing condition. The operation of 1915 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 1915 may be performed by a control message sending component 1335, as described with reference to Figure 13.

[0334] Figure 20 shows a flowchart illustrating Method 2000, which supports a technique for sharing a search space for control channel iterations, according to aspects of the present disclosure. The operation of Method 2000 may be performed by a base station or a component thereof, as described herein. For example, the operation of Method 2000 may be performed by base station 105, as described with reference to Figures 1 to 6 and Figures 11 to 14. In some examples, the base station may execute a set of instructions to control the functional elements of the base station to perform the functions described. In addition or alternatively, the base station may perform aspects of the functions described using dedicated hardware.

[0335] In 2005, the method may include the step of sending control signaling to the UE indicating a first search space set and a second search space set, wherein a first set of control channel decoding candidates related to scheduling a first component carrier is coupled for control channel iterations spanning the first and second search space sets, and a second set of control channel decoding candidates related to scheduling a second component carrier is not coupled across the first and second search space sets. The operation of 2005 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 2005 may be performed by a search space configuration component 1325 as described with reference to Figure 13.

[0336] In 2010, the method may include the step of identifying a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on control signaling. The operation of 2010 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 2010 may be performed by a search space sharing condition component 1330, as described with reference to Figure 13.

[0337] In 2015, the method may include the step of sending a first control message corresponding to a first set of control channel decoding candidates, a second set of control channel decoding candidates, or at least one of both control channel decoding candidates, according to a search space sharing condition. The operation of 2015 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 2015 may be performed by a control message sending component 1335, as described with reference to Figure 13.

[0338] In 2020, the method may include the step of sending a first control message to schedule a second component carrier on a first decryption candidate in the first search space set of the first set of control channel decryption candidates, relating to scheduling a first component carrier on a first set of control channel decryption candidates based on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decryption candidates and a second set of control channel decryption candidates. The operation of 2020 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 2020 may be performed by a control message sending component 1335, as described with reference to Figure 13.

[0339] In 2025, the method may include the step of sending an iteration of a first control message that schedules a second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates, relating to scheduling a first component carrier on a search space sharing condition and that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set. The operation of 2025 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 2025 may be performed by a control message sending component 1335, as described with reference to Figure 13.

[0340] Figure 21 shows a flowchart illustrating Method 2100, which supports a technique for sharing a search space for control channel iterations, according to aspects of the present disclosure. The operation of Method 2100 may be performed by a UE or a component thereof, as described herein. For example, the operation of Method 2100 may be performed by a UE 115, as described with reference to Figures 1 to 10. In some examples, the UE may execute a set of instructions to control a functional element of the UE to perform the described functions. Additional or alternative, the UE may perform aspects of the described functions using dedicated hardware.

[0341] In 2105, the method may include the step of receiving control signaling from an access network entity indicating a first search space set and a second search space set. The operation of 2105 may be performed according to examples such as those disclosed herein. In some examples, the operation of 2105 may be performed by a search space condition component 925, as described with reference to Figure 9.

[0342] In 2110, the method may include the step of identifying a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates is associated with scheduling a first component carrier for control channel iterations spanning a first set of search spaces and a second set of search spaces, or a second set of control channel decoding candidates is associated with scheduling a second component carrier, or both are associated. The operation of 2110 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 2110 may be performed by a search space sharing condition component 930, as described with reference to Figure 9.

[0343] In 2115, the method may include the step of monitoring a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to a search space sharing condition. The operation of 2115 may be performed according to examples such as those disclosed herein. In some examples, the operation of 2115 may be performed by a decoding candidate monitoring component 935, as described with reference to Figure 9.

[0344] Figure 22 shows a flowchart illustrating Method 2200, which supports a technique for sharing a search space for control channel iterations, according to aspects of the present disclosure. The operation of Method 2200 may be performed by a base station or a component thereof, such as an access network entity 140, as described herein. For example, the operation of Method 2200 may be performed by a base station 105, as described with reference to Figures 1 to 6 and Figures 11 to 14. In some examples, the base station may execute a set of instructions to control the functional elements of the base station to perform the functions described. In addition or alternatively, the base station may perform aspects of the functions described using dedicated hardware.

[0345] In 2205, the method may include the step of sending control signaling to the UE indicating a first set of search spaces and a second set of search spaces. The operation of 2205 may be performed according to examples such as those disclosed herein. In some examples, the operation of 2205 may be performed by a search space configuration component 1325, as described with reference to Figure 13.

[0346] In 2210, the method may include the step of identifying a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based on whether a first set of control channel decoding candidates is associated with scheduling a first component carrier for control channel iterations spanning a first set of search spaces and a second set of search spaces, or a second set of control channel decoding candidates is associated with scheduling a second component carrier, or both are associated. The operation of 2210 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 2210 may be performed by a search space sharing condition component 1330, as described with reference to Figure 13.

[0347] In 2215, the method may include the step of sending a first control message corresponding to a first set of control channel decoding candidates, a second set of control channel decoding candidates, or at least one of both control channel decoding candidates, according to a search space sharing condition. The operation of 2215 may be performed according to examples such as those disclosed herein. In some examples, aspects of the operation of 2215 may be performed by a control message sending component 1335, as described with reference to Figure 13.

[0348] The following provides an overview of the aspects of this disclosure.

[0349] Embodiment 1: A method for wireless communication in a UE, comprising: receiving a control signaling from a base station indicating a first search space set and a second search space set; identifying a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based at least in part on whether a first set of control channel decoding candidates related to scheduling a first component carrier is associated with a control channel iteration spanning the first search space set and the second search space set, or a second set of control channel decoding candidates related to scheduling a second component carrier, or both are associated with a search space sharing condition; and monitoring the first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, in accordance with the search space sharing condition.

[0350] Embodiment 2: The method of Embodiment 1, wherein the step of identifying a shared search space condition comprises the step of receiving a control signaling or a second control signaling indicating a shared search space condition.

[0351] Embodiment 3: Any method of Embodiments 1 to 2, wherein the monitoring step comprises receiving a first control message for scheduling a second component carrier on a first decryption candidate in the first search space set of the first set of control channel decryption candidates, relating to scheduling a first component carrier on a first decryption candidate in the first search space set of the first set of control channel decryption candidates, based at least in part on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decryption candidates and a second set of control channel decryption candidates.

[0352] Embodiment 4: The method of Embodiment 3, further comprising the step of receiving an iteration of a first control message scheduling a second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates relating to scheduling a first component carrier, at least based on a search space sharing condition and the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set.

[0353] Embodiment 5: Any method of Embodiments 1 to 4, further comprising the step of receiving a first control message for scheduling a first component carrier on a first decoded candidate of a second set of control channel decoded candidates, relating to scheduling a second component carrier in a first set of control channel decoded candidates, based at least in part on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decoded candidates and a second set of control channel decoded candidates.

[0354] Embodiment 6: Any method of Embodiments 1 to 5, wherein the monitoring step includes receiving a first control message for scheduling a third component carrier on a first decoder candidate in a first search space set of a first set of control channel decoder candidates related to scheduling a first component carrier, based at least in part on a search space sharing condition, wherein the search space sharing condition indicates that the first set of control channel decoder candidates related to scheduling a first component carrier is configured for search space sharing, based at least in part on the fact that the first set of control channel decoder candidates related to scheduling a first component carrier is linked for control channel iterations spanning a first search space set and a second search space set, and that the third set of control channel decoder candidates related to scheduling a third component carrier is linked for control channel iterations spanning a first search space set and a second search space set.

[0355] Embodiment 7: The method of Embodiment 6, further comprising the step of receiving an iteration of a first control message scheduling a third component carrier on a second decoding candidate in a second search space set of a first set of control channel decoding candidates related to scheduling a first component carrier.

[0356] Embodiment 8: Any method of Embodiments 1 to 7, wherein the monitoring step includes receiving a first control message scheduling a third component carrier on a first decoding candidate in a first search space set of a second set of control channel decoding candidates related to scheduling a second component carrier, based at least in part on a search space sharing condition, wherein the search space sharing condition indicates that the second set of control channel decoding candidates related to scheduling a second component carrier is configured for search space sharing, based at least in part on the fact that the second set of control channel decoding candidates is not linked across the first and second search space sets, and the third set of control channel decoding candidates related to scheduling a third component carrier is not linked across the first and second search space sets.

[0357] Embodiment 9: Any method of Embodiments 1 to 8, wherein the step of identifying a search space sharing condition is to identify that the search space sharing condition indicates that no search space sharing is established between the first set of control channel decoding candidates and the second set of control channel decoding candidates, based at least in part on the fact that the first set of control channel decoding candidates is linked for control channel iterations spanning the first and second search space sets, and the second set of control channel decoding candidates is not linked for control channel iterations spanning the first and second search space sets.

[0358] Embodiment 10: Any method of Embodiments 1 to 9, wherein the step of identifying a search space sharing condition comprises identifying that the search space sharing condition indicates that no search space sharing is established for any decoding candidate in the first search space set and the second search space set.

[0359] Embodiment 11: A method of any one of Embodiments 1 to 10, wherein the step of identifying search space sharing conditions comprises transmitting an indication of UE capability for search space sharing to a base station, and receiving a control signaling or a second control signaling indicating the search space sharing conditions, at least in part based on the UE capability for search space sharing.

[0360] Embodiment 12: The method of Embodiment 11, wherein the UE capability indication indicates that the UE is capable of sharing a search space among sets of control channel decoding candidates that are not linked for control channel iterations.

[0361] Embodiment 13: The method of Embodiment 12, wherein the UE capability indication further indicates that the UE is capable of sharing a search space among sets of control channel decoding candidates that are linked together for control channel iterations.

[0362] Embodiment 14: Any method from Embodiments 11 to 13 in which the indication of UE capability indicates that the UE is capable of sharing a search space related to control channel iterations.

[0363] Embodiment 15: Any method of Embodiments 1 to 14, further comprising the step of receiving a second control signaling from a base station for enabling or disabling a search space sharing condition.

[0364] Embodiment 16: The method of Embodiment 15, wherein the step of receiving a second control signaling is to receive a second control signaling for enabling or disabling a search space sharing condition for one or more cell groups, one or more component carriers including a set of control channel decoding candidates configured for a UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof.

[0365] Embodiment 17: Any method of Embodiments 15 to 16, wherein the step of receiving a second control signaling comprises the step of receiving a second control signaling via a wireless resource control signaling.

[0366] Embodiment 18: A method for wireless communication at a base station, comprising: transmitting a control signaling to a UE indicating a first search space set and a second search space set; identifying a search space sharing condition for a first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, based at least in part on whether a first set of control channel decoding candidates related to scheduling a first component carrier is associated with a control channel iteration spanning the first search space set and the second search space set, or a second set of control channel decoding candidates related to scheduling a second component carrier, or both are associated with a search space sharing condition; and transmitting a first control message corresponding to at least one control channel decoding candidate of the first set of control channel decoding candidates, a second set of control channel decoding candidates, or both, according to the search space sharing condition.

[0367] Embodiment 19: The method of Embodiment 18, further comprising the step of transmitting a control signaling or a second control signaling indicating a search space sharing condition.

[0368] Embodiment 20: Any method of Embodiments 18 to 19, wherein the step of transmitting is to transmit a first control message that schedules a second component carrier on a first decryption candidate in the first search space set of the first set of control channel decryption candidates, relating to scheduling a first component carrier on a first decryption candidate in the first search space set of the first set of control channel decryption candidates, based at least in part on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decryption candidates and a second set of control channel decryption candidates.

[0369] Embodiment 21: The method of Embodiment 20, further comprising the step of transmitting an iteration of a first control message scheduling a second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates relating to scheduling a first component carrier, at least in part on a search space sharing condition and on the fact that a first set of control channel decoding candidates is linked for control channel iterations spanning a first search space set and a second search space set.

[0370] Embodiment 22: Any method of Embodiments 18 to 21, further comprising the step of sending a first control message to schedule a first component carrier on a first decoded candidate of a second set of control channel decoded candidates relating to scheduling a second component carrier in a first set of control channel decoded candidates, based at least in part on a search space sharing condition indicating that the search space sharing is configured for a first set of control channel decoded candidates and a second set of control channel decoded candidates.

[0371] Embodiment 23: Any method of Embodiments 18 to 22, wherein the step of transmitting is to transmit a first control message scheduling a third component carrier on a first decoder candidate in a first search space set of a first set of control channel decoder candidates relating to scheduling a first component carrier, wherein the search space sharing condition indicates that the first set of control channel decoder candidates relating to scheduling a first component carrier is configured for search space sharing, at least on the basis that the first set of control channel decoder candidates relating to scheduling a first component carrier is linked for control channel iterations spanning a first search space set and a second search space set, and that the third set of control channel decoder candidates relating to scheduling a third component carrier is linked for control channel iterations spanning a first search space set and a second search space set.

[0372] Embodiment 24: The method of Embodiment 23, further comprising the step of sending an iteration of a first control message scheduling a third component carrier on a second decoding candidate in a second search space set of a first set of control channel decoding candidates related to scheduling a first component carrier.

[0373] Embodiment 25: Any method of Embodiments 18 to 24, wherein the step of transmitting is to transmit a first control message scheduling a third component carrier on a first decoder candidate in a first search space set of a second set of control channel decoder candidates relating to scheduling a second component carrier, wherein the search space sharing condition is to indicate that the second set of control channel decoder candidates relating to scheduling a second component carrier is configured for search space sharing, at least on the basis that the second set of control channel decoder candidates relating to scheduling a second component carrier is not linked across the first and second search space sets, and the third set of control channel decoder candidates relating to scheduling a third component carrier is not linked across the first and second search space sets.

[0374] Embodiment 26: Any method of Embodiments 18 to 25, wherein the step of identifying a search space sharing condition is to identify that the search space sharing condition indicates that no search space sharing is established between the first set of control channel decoding candidates and the second set of control channel decoding candidates, based at least in part on the fact that the first set of control channel decoding candidates is linked for control channel iterations spanning the first set of search space and the second set of search space, and the second set of control channel decoding candidates is not linked for control channel iterations spanning the first set of search space and the second set of search space.

[0375] Embodiment 27: Any method of Embodiments 18 to 26, wherein the step of identifying a search space sharing condition comprises identifying that the search space sharing condition indicates that no search space sharing is established for any decoding candidate in the first search space set and the second search space set.

[0376] Embodiment 28: A method of any embodiment 18 to 27, wherein the step of identifying a search space sharing condition comprises receiving an indication of UE capability for search space sharing from a UE, and transmitting a control signaling or a second control signaling indicating a search space sharing condition, at least in part based on the UE capability for search space sharing.

[0377] Embodiment 29: The method of Embodiment 28, wherein the UE capability indication indicates that the UE is capable of sharing a search space among sets of control channel decoding candidates that are not linked for control channel iterations.

[0378] Embodiment 30: The method of Embodiment 29, wherein the UE capability indication further indicates that the UE is capable of sharing a search space among sets of control channel decoding candidates that are linked together for control channel iterations.

[0379] Embodiment 31: Any method of Embodiments 28 to 30 wherein the indication of UE capability indicates that the UE is capable of sharing a search space related to control channel iterations.

[0380] Embodiment 32: Any method of Embodiments 18 to 31, further comprising the step of sending a second control signaling to the UE for enabling or disabling a search space sharing condition.

[0381] Embodiment 33: The method of Embodiment 32, wherein the step of transmitting a second control signaling comprises transmitting a second control signaling for enabling or disabling a search space sharing condition for one or more cell groups, one or more component carriers comprising a set of control channel decoding candidates configured for a UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof.

[0382] Embodiment 34: Any method of Embodiments 32 to 33, wherein the step of transmitting a second control signaling comprises the step of transmitting a second control signaling via a wireless resource control signaling.

[0383] Embodiment 35: A device for wireless communication in a UE, comprising a processor, a memory coupled to the processor, and instructions stored in the memory that can be executed by the processor to cause the device to perform any of Embodiments 1 to 17.

[0384] Embodiment 36: Apparatus for wireless communication in a UE, comprising at least one means for performing any of embodiments 1 to 17.

[0385] Embodiment 37: A non-temporary computer-readable medium for storing code for wireless communication in a UE, wherein the code comprises instructions that can be executed by a processor to perform any of Embodiments 1 to 17.

[0386] Embodiment 38: A device for wireless communication at a base station, comprising a processor, a memory coupled to the processor, and instructions stored in the memory that can be executed by the processor to cause the device to perform any of the methods of Embodiments 18 to 34.

[0387] Embodiment 39: An apparatus for wireless communication at a base station, comprising at least one means for performing any of the methods of Embodiments 18 to 34.

[0388] Embodiment 40: A non-temporary computer-readable medium for storing code for wireless communication at a base station, wherein the code comprises instructions that can be executed by a processor to perform any of the methods of Embodiments 18 to 34.

[0389] It should be noted that the methods described herein describe possible implementations, and that the operation and steps may be reconfigured or otherwise modified, and that other implementations are possible. Furthermore, two or more embodiments of these methods may be combined.

[0390] While embodiments of LTE, LTE-A, LTE-A Pro, or NR systems may be described as examples, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used extensively in the description, the techniques described herein are applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR. For example, the techniques described may be applicable to various other wireless communication systems such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and wireless technologies not expressly mentioned herein.

[0391] The information and signals described herein can be represented using a wide variety of techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout this description may be represented by voltage, electric current, electromagnetic waves, magnetic fields or magnetic particles, light fields or optical particles, or any combination thereof.

[0392] The various exemplary blocks and components described in this disclosure may be implemented or run using general-purpose processors, DSPs, ASICs, CPUs, FPGAs or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but alternatively, a processor may be any processor, controller, microcontroller, or state machine. A processor may be implemented as a combination of computing devices (for example, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working with a DSP core, or any other such combination).

[0393] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. When implemented in software executed by a processor, the functions may be stored in or transmitted via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope of this disclosure and the accompanying claims. For example, due to the nature of the software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features implementing the functions may also be physically arranged in various locations, including being distributed so that parts of the functions are implemented in different physical locations.

[0394] Computer-readable media include both non-temporary computer storage media and communication media, including any media that enables the transfer of computer programs from one location to another. Non-temporary storage media can be any available media that can be accessed by a general-purpose or dedicated computer. Examples, rather than limitations, of non-temporary computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-temporary media used to carry or store desired program code means in the form of instructions or data structures, and that can be accessed by a general-purpose or dedicated computer or general-purpose or dedicated processor. Any connection is also appropriately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable media. As used herein, the terms "disk" and "disc" include CDs, laserdiscs, optical discs, digital multipurpose discs (DVDs), floppy disks, and Blu-ray® discs, where a disk typically reproduces data magnetically and a disc reproduces data optically using a laser. Combinations of these terms are also included within the scope of computer-readable media.

[0395] When used herein, including within the claims, “or” as used in an enumeration of items (for example, an enumeration of items followed by a phrase such as “at least one of” or “one or more of”) indicates an inclusive enumeration, such as the enumeration “at least one of A, B, or C” meaning A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, the phrase “based on” as used herein should not be construed as a reference to a closed set of conditions. For example, an exemplary step described as “based on condition A” may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, the phrase “based on” as used herein should be construed in the same way as the phrase “based on at least part of.”

[0396] The term “decide” or “to decide” encompasses a wide range of actions, and therefore “deciding” may include calculating, calculating, processing, deriving, investigating, searching (for example, through searching in a table, database, or other data structure), confirming, etc. “Deciding” may also include receiving (such as receiving information), accessing (such as accessing data in memory), etc. Furthermore, “deciding” may include resolving, selecting, choosing, establishing, or other such similar actions.

[0397] In the attached diagram, similar components or features may have the same reference label. Furthermore, different components of the same type may be distinguished by following the reference label with a dash and a second label that distinguishes similar components. Where only the first reference label is used herein, the description is applicable to any similar component having the same first reference label, regardless of the second reference label or any other subsequent reference labels.

[0398] The descriptions provided herein with respect to the accompanying drawings describe exemplary configurations and do not necessarily represent all examples that may be implemented or fall within the scope of the claims. The term “example” as used herein means “acting as an example, case, or illustration,” and does not mean “preferred” or “advantageous over other examples.” Detailed descriptions include specific details to facilitate understanding of the described techniques. However, these techniques may be practiced without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0399] The description herein is provided to enable those skilled in the art to create or use this disclosure. Various modifications of this disclosure will become apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of this disclosure. Accordingly, this disclosure should be given the broadest scope that is consistent with the principles and novel features disclosed herein, and is not limited to the examples and designs described herein. [Explanation of Symbols]

[0400] 100 Wireless Communication Systems 105 Base station 110 coverage areas 115 UE 120 backhaul links 125 Communication Link 130 Core Network 135 D2D communication link 140 Access Network Entities 145 Access Network Transmitting Entities 150 IP services 200 Resource Conditions 205 Exploration Space Set 210 Monitoring opportunities 300 Resource Conditions 305 First scheduled component carrier, second scheduled component carrier 310 Exploration Space Set 315 Control channel candidates 400 Wireless Communication Systems 405 Communication Link 410 Conditions 415 Control Message 420 ability 500 resource conditions 505 First Exploration Space Set 510 Second Exploration Space Set 515 Control channel candidates 520 control channel candidates 600 Process Flows 700 Block Diagram 705 devices 710 Receiver 715 Transmitter 720 Communications Manager 800 Block Diagram 805 devices 810 Receiver 815 Transmitter 820 Communications Manager 825 Search Space Condition Component 830 Search Space Shared Condition Component 835 Decryption Candidate Monitoring Component 900 Block Diagram 920 Communications Manager 925 Search Space Condition Component 930 Search Space Shared Condition Component 935 Decryption Candidate Monitoring Component 940 Capability Components 945 Search Space Sharing Switching Component 1000 System 1005 devices 1010 Input / Output (I / O) Controller 1015 Transceiver 1020 Communications Manager 1025 Antenna 1030 memory 1035 Code, Computer Executable Code 1040 processor 1045 Bus 1100 Block Diagram 1105 devices 1110 Receiver 1115 Transmitter 1120 Communications Manager 1200 Block Diagram 1205 devices 1210 Receiver 1215 Transmitter 1220 Communications Manager 1225 Search Space Configuration Component 1230 Search Space Shared Condition Component 1235 Control message sending component 1300 Block Diagram 1320 Communications Manager 1325 Search Space Configuration Component 1330 Search Space Shared Condition Component 1335 Control message sending component 1340 Ability Components 1345 Search Space Sharing Switching Component 1400 System 1405 Devices 1410 Network Communications Manager 1415 Transceiver 1420 Communications Manager 1425 Antenna 1430 memory 1435 Code 1440 processor 1445 Inter-station communications manager 1450 Bus 1500 ways 1600 methods 1700 methods 1800 methods 1900 method 2000 methods 2100 method

Claims

1. A device for wireless communication in user equipment (UE), Processor and The memory coupled to the aforementioned processor, The device comprises instructions stored in the memory, and the instructions are transmitted to the device. The access network entity receives control signaling indicating the first and second search space sets. A first set of control channel decoding candidates related to scheduling a first component carrier, a second set of control channel decoding candidates related to scheduling a second component carrier, or both, can identify a search space sharing condition for sharing the search space with a third set of control channel decoding candidates related to scheduling a third component carrier. In accordance with the search space sharing conditions, monitor the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both. Thus, it is executable by the aforementioned processor, The device, wherein the instruction is executable by the processor to cause the device to identify the search space sharing condition, at least in part, based on whether the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both are linked to each other for control channel iterations spanning the first set of search spaces and the second set of search spaces.

2. The command for monitoring is given to the device, The apparatus according to claim 1, wherein the processor is capable of causing a first control message to be received on a first decoding candidate in the first search space set of the first set of control channel decoding candidates relating to scheduling the first component carrier, based at least in part on the search space sharing condition indicating that the search space sharing is configured for the first set of control channel decoding candidates and the second set of control channel decoding candidates.

3. The aforementioned instruction further instructs the device, Apparatus according to claim 2, wherein the processor can cause the first set of control channel decoding candidates to receive iterations of the first control message scheduling the second component carrier on a second decoding candidate in the second search space set of the first set of control channel decoding candidates relating to scheduling the first component carrier, based at least in part on the search space sharing condition and the fact that the first set of control channel decoding candidates are linked together for control channel iterations spanning the first search space set and the second search space set.

4. The command for monitoring is given to the device, Apparatus according to claim 1, wherein the processor is capable of causing a first control message for scheduling a third component carrier to be received on a first decoding candidate in the first search space set of the second set of control channel decoding candidates related to scheduling the second component carrier, based at least in part on the search space sharing condition, wherein the search space sharing condition indicates that the second set of control channel decoding candidates related to scheduling the second component carrier is configured for search space sharing, based at least in part on the fact that the second set of control channel decoding candidates related to scheduling the second component carrier is not linked to one another across the first search space set and the second search space set, and the third set of control channel decoding candidates related to scheduling the third component carrier is not linked to one another across the first search space set and the second search space set.

5. The aforementioned instruction further instructs the device, Based at least in part on the search space sharing condition indicating that the search space sharing is configured for the first set of control channel decoding candidates and the second set of control channel decoding candidates, a first control message is received on the first decoding candidate of the second set of control channel decoding candidates, which is related to scheduling the second component carrier in the first search space set, or The access network entity receives a second control signaling to enable or disable the search space sharing condition for one or more cell groups, one or more component carriers including a set of control channel decoding candidates configured for the UE, one or more pairs of scheduled component carriers, one or more search space sets, or any combination thereof. The apparatus according to claim 1, which is executable by the processor as described above.

6. The command for monitoring is given to the device, Apparatus according to claim 1, wherein the processor is capable of causing a first control message for scheduling the third component carrier to be received on the first decoding candidate in the first search space set of the first set of control channel decoding candidates related to scheduling the first component carrier, based at least in part on the search space sharing condition, wherein the search space sharing condition indicates that the first set of control channel decoding candidates related to scheduling the first component carrier is configured for search space sharing, based at least in part on the fact that the first set of control channel decoding candidates related to scheduling the first component carrier is linked to each other for control channel iterations spanning the first search space set and the second search space set, and that the third set of control channel decoding candidates related to scheduling the third component carrier is linked to each other for control channel iterations spanning the first search space set and the second search space set.

7. The aforementioned instruction further instructs the device, The apparatus according to claim 6, wherein the processor is capable of causing iteratives of the first control message scheduling the third component carrier to be received on a second decoding candidate in the second search space set of the first set of control channel decoding candidates related to scheduling the first component carrier.

8. The command for identifying the shared search space conditions is given to the device, The system receives the control signaling or a second control signaling indicating the search space sharing conditions, or The search space sharing condition indicates that no search space sharing is established between the first set of control channel decoding candidates and the second set of control channel decoding candidates, at least in part on the fact that the first set of control channel decoding candidates is linked to one another for control channel iterations spanning the first search space set and the second search space set, and the second set of control channel decoding candidates is not linked to one another for control channel iterations spanning the first search space set and the second search space set, or Specify that the search space sharing condition indicates that no search space sharing is configured for any decoding candidate in the first search space set and the second search space set. The apparatus according to claim 1, which is executable by the processor as described above.

9. The command for identifying the shared search space conditions is given to the device, The apparatus according to claim 1, wherein the processor is capable of causing the access network entity to transmit an indication of UE capability for sharing a search space.

10. The apparatus according to claim 9, wherein the step of receiving the control signaling or a second control signaling indicating the search space sharing conditions is at least in part based on the UE capability for search space sharing.

11. The apparatus according to claim 10, wherein the indication of the UE capability further indicates that the UE is capable of sharing a search space among sets of control channel decoding candidates that are linked for control channel iteration.

12. A device for wireless communication in an access network entity, Processor and The memory coupled to the aforementioned processor, The device comprises instructions stored in the memory, and the instructions are transmitted to the device. The user device (UE) is instructed to send control signaling indicating the first search space set and the second search space set. A first set of control channel decoding candidates related to scheduling a first component carrier, a second set of control channel decoding candidates related to scheduling a second component carrier, or both, can identify a search space sharing condition for sharing the search space with a third set of control channel decoding candidates related to scheduling a third component carrier. In accordance with the search space sharing condition, a first control message is sent corresponding to the first set of control channel decoding candidates, the second set of control channel decoding candidates, or at least one control channel decoding candidate from both sets. Thus, it is executable by the aforementioned processor, The device, wherein the instruction is executable by the processor to cause the device to identify the search space sharing condition, at least in part, based on whether the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both are linked to each other for control channel iterations spanning the first set of search spaces and the second set of search spaces.

13. The command for identifying the shared search space conditions is given to the device, The processor can be configured to receive an indication of UE capability for sharing the search space from the aforementioned UE. The aforementioned instruction further instructs the device, The apparatus according to claim 12, wherein the processor is capable of causing the UE to transmit the control signaling or a second control signaling indicating the search space sharing condition, based at least in part on the UE capability for search space sharing, the indication of the UE capability indicating that the UE is capable of search space sharing among sets of control channel decoding candidates that are not linked for control channel iterations.

14. A method for wireless communication in user equipment (UE), The steps include receiving control signaling from an access network entity that indicates a first search space set and a second search space set, Steps include identifying search space sharing conditions for a first set of control channel decoding candidates related to scheduling a first component carrier, a second set of control channel decoding candidates related to scheduling a second component carrier, or both, to share a search space with a third set of control channel decoding candidates related to scheduling a third component carrier, The step of monitoring the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, in accordance with the search space sharing conditions, A method for determining the search space sharing condition, wherein the step of determining the search space sharing condition is at least in part on whether the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both are linked to each other for control channel iterations spanning the first set of search spaces and the second set of search spaces.

15. A method for wireless communication in an access network entity, The steps include transmitting control signaling to a user device (UE) indicating a first search space set and a second search space set, Steps include identifying search space sharing conditions for a first set of control channel decoding candidates related to scheduling a first component carrier, a second set of control channel decoding candidates related to scheduling a second component carrier, or both, to share a search space with a third set of control channel decoding candidates related to scheduling a third component carrier, The step of sending a first control message corresponding to the first set of control channel decoding candidates, the second set of control channel decoding candidates, or at least one control channel decoding candidate in accordance with the search space sharing condition, A method for determining the search space sharing condition, wherein the step of determining the search space sharing condition is at least in part on whether the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both are linked to each other for control channel iterations spanning the first set of search spaces and the second set of search spaces.

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