CN117099334A

CN117099334A - Repetition of a common set of search spaces for downlink control channels

Info

Publication number: CN117099334A
Application number: CN202280023479.3A
Authority: CN
Inventors: M·科什内维桑; 张晓霞; J·孙; 骆涛
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2021-04-01
Filing date: 2022-03-31
Publication date: 2023-11-21

Abstract

The user equipment, UE, (115-b) receives an indication (305, 310) from the base station (105-b) that the first set of common search spaces (340) and the second set of common search spaces (345) are linked for repetition of a downlink control channel comprising downlink control information (315) associated with a random access procedure, scheduling of system information, or paging procedure. The UE monitors the first set of common search spaces (340) and the second set of common search spaces (345) for the downlink control information based at least in part on the indication. The UE decodes the downlink control information (315) using at least one of a first physical downlink control channel candidate of the first set of common search spaces (340) and a second physical downlink control channel candidate of the second set of common search spaces (345), wherein the first physical downlink control channel candidate is linked to the second physical downlink control channel candidate as its repetition.

Description

Repetition of a common set of search spaces for downlink control channels

Cross reference

This patent application claims the benefit of U.S. provisional patent application No.63/169,650 entitled "DOWNLINK CHANNEL REPETITION FOR COMMON SEARCH SPACE SETS (downlink channel repetition for shared set of search spaces)" filed by KHOSHNEVISAN et al at 2021, 4, and U.S. patent application No.17/708,516 entitled "DOWNLINK CHANNEL REPETITION FOR COMMON SEARCH SPACE SETS (downlink channel repetition for shared set of search spaces)" filed by KHOSHNEVISAN et al at 2022, 3, 31; each of which is assigned to the assignee of the present application.

Technical Field

The present disclosure relates to wireless communications, including downlink channel repetition for a common set of search spaces.

Background

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing the 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, which may be referred to as New Radio (NR) systems. These systems may employ various techniques 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 of which simultaneously support communication for multiple communication devices, which may be otherwise referred to as User Equipment (UE).

The wireless communication system may support retransmission of control information and data to increase the likelihood that the control information and data is successfully received at the recipient device. In some cases, various resources for retransmitting control information and data are configured by the transmitting device.

SUMMARY

The described technology relates to improved methods, systems, devices, and apparatuses supporting downlink channel repetition for a common set of search spaces.

In general, the described techniques provide for supporting downlink control channel repetition, where the downlink control channel includes downlink control information (e.g., type 0, 0A, 1, or 2 downlink control information) associated with a random access procedure, scheduling of system information, or paging procedure. A User Equipment (UE) may receive an indication that a first set of common search spaces and a second set of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or a paging procedure. The UE may monitor the first set of common search spaces and the second set of common search spaces for the downlink control information based at least in part on the indication. The UE may decode the downlink control information using at least one of a first physical downlink control channel candidate of the first set of common search spaces or a second physical downlink control channel candidate of the second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

A method for wireless communication at a User Equipment (UE) is described. The method may include: the method includes receiving an indication that a first set of common search spaces and a second set of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or a paging procedure, monitoring the first set of common search spaces and the second set of common search spaces for the downlink control information based on the indication, and decoding the downlink control information using at least one of a first physical downlink control channel candidate of the first set of common search spaces or a second physical downlink control channel candidate of the second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: the method includes receiving an indication that a first set of common search spaces and a second set of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or a paging procedure, monitoring the first set of common search spaces and the second set of common search spaces for the downlink control information based on the indication, and decoding the downlink control information using at least one of a first physical downlink control channel candidate of the first set of common search spaces or a second physical downlink control channel candidate of the second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

Another apparatus for wireless communication at a UE is described. The apparatus may include: the apparatus includes means for receiving an indication that a first set of common search spaces and a second set of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, a schedule of system information, or a paging procedure, means for monitoring the first set of common search spaces and the second set of common search spaces for the downlink control information based on the indication, and means for decoding the downlink control information using at least one of a first physical downlink control channel candidate of the first set of common search spaces or a second physical downlink control channel candidate of the second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: the method includes receiving an indication that a first set of common search spaces and a second set of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or a paging procedure, monitoring the first set of common search spaces and the second set of common search spaces for the downlink control information based on the indication, and decoding the downlink control information using at least one of a first physical downlink control channel candidate of the first set of common search spaces or a second physical downlink control channel candidate of the second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, receiving the indication may include operations, features, apparatus or instructions for: the method includes receiving a first control message including a configuration for repeatedly linking the first set of common search spaces with the second set of common search spaces, and receiving a second control message indicating that the first set of common search spaces is monitored for the downlink control channel based on downlink control information associated with one of the random access procedure, the scheduling of system information, or the paging procedure.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, receiving the indication may include operations, features, apparatus or instructions for: a control message is received indicating that both the first set of common search spaces and the second set of common search spaces may be linked and both the first set of common search spaces and the second set of common search spaces are monitored for the downlink control channel based on the downlink control information being associated with one of the random access procedure, the scheduling of the system information, or the paging procedure.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, receiving the control message may include operations, features, means or instructions for: a common physical downlink control channel configuration message is received indicating that both a first index associated with the first set of common search spaces and a second index associated with the second set of common search spaces correspond to the same common search space set type.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: determining a number of downlink control channel candidates for the first and second sets of common search spaces for a control channel element aggregation level of a set of control channel element aggregation levels, wherein the UE monitors the first and second sets of common search spaces based on the determined number of downlink control channel candidates.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: a mapping between the control channel element aggregation level and a number of downlink control channel candidates for the control channel element aggregation level is identified and the number of downlink control channel candidates are assigned to both the first set of common search spaces and the second set of common search spaces.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: a mapping between the control channel element aggregation level and a number of downlink control channel candidates for the control channel element aggregation level is identified and one half of the number of downlink control channel candidates are assigned to both the first set of common search spaces and the second set of common search spaces.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: the method further includes identifying a mapping between the control channel element aggregation level and a number of downlink control channel candidates for the control channel element aggregation level and assigning the number of downlink control channel candidates to the first and second common search space sets based on whether the first and second common search space sets can be located within a same transmission time interval.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, the UE assigns half of the number of downlink control channel candidates to both the first and second sets of common search spaces when the first and second sets of common search spaces may be located within the same transmission time interval, and assigns the number of downlink control channel candidates to both the first and second sets of common search spaces when the first and second sets of common search spaces may be located within separate transmission time intervals.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: a mapping between the control channel element aggregation level and a number of downlink control channel candidates for the control channel element aggregation level is identified based on the first or second set of common search spaces having an index of 0.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: a number of downlink control channel candidates for the control channel element aggregation level is determined based on the search space set configuration corresponding to both the first common search space set and the second common search space set.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: the total number of downlink control channel candidates is determined by determining the number for each control channel element aggregation level in the set of control channel element aggregation levels.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: receiving an indication that the first set of common search spaces may have an index of 0, receiving an indication of a first configuration for the first set of common search spaces based on the first set of common search spaces having an index of 0, and receiving an indication of a second configuration for the second set of common search spaces corresponding to the first configuration.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: receiving an indication that the first set of common search spaces may have an index of 0, wherein the first set of common search spaces may be associated with one or more first monitoring occasions, and monitoring one or more second monitoring occasions of the second set of common search spaces, the one or more second monitoring occasions mapped to the one or more first monitoring occasions of the first set of common search spaces according to the first set of common search spaces having an index of 0.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: suppressing monitoring a second monitoring occasion of the second set of common search spaces that is not mapped to any of the one or more first monitoring occasions of the first set of common search spaces.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: the one or more second monitoring occasions of the second set of common search spaces are mapped to the one or more first monitoring occasions of the first set of common search spaces based on the first set of common search spaces and the second set of common search spaces being located within the same time slot or within consecutive time slots, a first number of the one or more first monitoring occasions relative to a second number of monitoring occasions of the second set of common search spaces, or a combination thereof.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: an indication is transmitted that the UE supports repetition of the downlink control channel including downlink control information associated with the random access procedure, scheduling of the system information, the paging procedure, or a combination thereof.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, transmitting the indication may include operations, features, means or instructions for: transmitting an indication of supporting each radio network temporary identifier type, transmitting an indication of supporting a link of a search space set with search space set 0, transmitting an indication of supporting an inter-slot link, transmitting an indication of supporting an intra-slot link, transmitting an indication of supporting a UE-specific search space set link, transmitting an indication of supporting a type 3 search space set link, or a combination thereof.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, transmitting the indication may include operations, features, means or instructions for: a separate indication specifying each of the support type 0, type 0A, type 1, and type 2 downlink control channel common search space set links is transmitted.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: a first control message is received based on transmitting the indication, the first control message including a configuration to repeatedly link the first set of common search spaces with the second set of common search spaces.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, the first set of common search spaces and the second set of common search spaces may both be a type 0 common search space set associated with a system information radio network temporary identifier, a type 0A common search space set associated with a system information radio network temporary identifier, a type 1 common search space set associated with a random access radio network temporary identifier, an MsgB radio network temporary identifier, or a temporary cell radio network temporary identifier, or a type 2 common search space set associated with a paging radio network temporary identifier.

A method for wireless communication at a UE is described. The method may include: receiving an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel comprising first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and downlink control information messages associated with the random access procedure, the scheduling of system information, or the paging procedure, and monitoring the first set of common search spaces for the downlink control channel based on the first set of common search spaces being configured according to the acknowledgement rule.

An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: receiving an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel comprising first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and downlink control information messages associated with the random access procedure, the scheduling of system information, or the paging procedure, and monitoring the first set of common search spaces for the downlink control channel based on the first set of common search spaces being configured according to the acknowledgement rule.

Another apparatus for wireless communication at a UE is described. The apparatus may include: means for receiving an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel comprising first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure, and means for monitoring the first set of common search spaces for the downlink control channel based on the first set of common search spaces being configured according to the acknowledgement rule.

A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: receiving an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel comprising first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and downlink control information messages associated with the random access procedure, the scheduling of system information, or the paging procedure, and monitoring the first set of common search spaces for the downlink control channel based on the first set of common search spaces being configured according to the acknowledgement rule.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, the validation rule may be that the UE does not expect a type 0, type 0a, type 1 or type 2 common set of search spaces to be linked to another set of search spaces.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, the validation rule may be that the UE does not expect a common set of search spaces with index 0 to be linked to another common set of search spaces.

A method for wireless communication at a base station is described. The method may include: transmitting an indication to the UE that the first and second sets of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or paging procedure, encoding the downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based on the indication, and transmitting the encoded downlink control information to the UE in the first set of common search spaces including the first downlink control channel candidate and in the second set of common search spaces including the second downlink control channel candidate.

An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: transmitting an indication to the UE that the first and second sets of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or paging procedure, encoding the downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based on the indication, and transmitting the encoded downlink control information to the UE in the first set of common search spaces including the first downlink control channel candidate and in the second set of common search spaces including the second downlink control channel candidate.

Another apparatus for wireless communication at a base station is described. The apparatus may include: means for transmitting an indication to a UE that a first set of common search spaces and a second set of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or paging procedure, means for encoding the downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based on the indication, and means for transmitting the encoded downlink control information to the UE in the first set of common search spaces including the first downlink control channel candidate and in the second set of common search spaces including the second downlink control channel candidate.

A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: transmitting an indication to the UE that the first and second sets of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or paging procedure, encoding the downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based on the indication, and transmitting the encoded downlink control information to the UE in the first set of common search spaces including the first downlink control channel candidate and in the second set of common search spaces including the second downlink control channel candidate.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, transmitting the indication may include operations, features, means or instructions for: transmitting a first control message including a configuration for repeatedly linking the first set of common search spaces with the second set of common search spaces, and transmitting a second control message indicating to monitor the first set of common search spaces for the downlink control channel based on the downlink control information being associated with one of the random access procedure, the scheduling of the system information, or the paging procedure.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, transmitting the indication may include operations, features, means or instructions for: a control message is transmitted indicating that both the first set of common search spaces and the second set of common search spaces may be linked and the first set of common search spaces and the second set of common search spaces are monitored for the downlink control channel based on the downlink control information being associated with one of the random access procedure, the scheduling of the system information, or the paging procedure.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, transmitting the control message may include operations, features, means or instructions for: a common physical downlink control channel configuration message is transmitted indicating that both a first index associated with the first set of common search spaces and a second index associated with the second set of common search spaces correspond to the same common search space set type.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level is identified, and the number of downlink control channel candidates are assigned to both the first set of common search spaces and the second set of common search spaces.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level is identified, and one half of the number of downlink control channel candidates are assigned to both the first set of common search spaces and the second set of common search spaces.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: the method further includes identifying a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level, and assigning the number of downlink control channel candidates to the first and second common search space sets based on whether the first and second common search space sets can be located within a same transmission time interval.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, the base station assigns half of the number of downlink control channel candidates to both the first and second sets of common search spaces when the first and second sets of common search spaces may be located within the same transmission time interval, and assigns the number of downlink control channel candidates to both the first and second sets of common search spaces when the first and second sets of common search spaces may be located within separate transmission time intervals.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level is identified based on the first or second set of common search spaces having an index of 0.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, determining the number of downlink control channel candidates for the control channel element aggregation level may include operations, features, apparatus or instructions for: the number of downlink control channel candidates for the control channel element aggregation level is determined based on the search space set configuration corresponding to both the first common search space set and the second common search space set.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: transmitting an indication that the first set of common search spaces may have an index of 0, transmitting an indication of a first configuration for the first set of common search spaces according to the first set of common search spaces having an index of 0, and transmitting an indication of a second configuration for the second set of common search spaces corresponding to the first configuration.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: transmitting an indication that the first set of common search spaces may have an index of 0, wherein the first set of common search spaces may be associated with one or more first monitoring occasions, and wherein the second downlink control channel candidate may be located within a second monitoring occasion of the second set of common search spaces, and the second monitoring occasion may be mapped to a first monitoring occasion of the one or more first monitoring occasions.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: the downlink control information is suppressed from being encoded in a third downlink control channel candidate for a third monitoring occasion that may not be mapped to one of the first monitoring occasions.

Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, means or instructions for: an indication is received from the UE that the UE supports repetition of the downlink control channel including the downlink control information associated with the random access procedure, scheduling of the system information, the paging procedure, or a combination thereof.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, receiving the indication may include operations, features, apparatus or instructions for: receiving an indication of supporting each radio network temporary identifier type, receiving an indication of supporting a link of a search space set with search space set 0, receiving an indication of supporting an inter-slot link, receiving an indication of supporting an intra-slot link, receiving an indication of supporting a UE-specific search space set link, receiving an indication of supporting a type 3 search space set link, or a combination thereof.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, receiving the indication may include operations, features, apparatus or instructions for: an indication specifying support for each of type 0, type 0A, type 1, and type 2 downlink control channel common search space set links is received.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, receiving the indication may include operations, features, apparatus or instructions for: a first control message is transmitted based on the received indication, the first control message including a configuration to repeatedly link the first set of common search spaces with the second set of common search spaces.

A method for wireless communication at a base station is described. The method may include: transmitting, to a UE, an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and downlink control information messages associated with the random access procedure, the scheduling of system information, or the paging procedure, encoding the first downlink control information in the first set of common search spaces based on the first set of common search spaces being configured according to the acknowledgement rule, and transmitting the encoded first downlink control information.

An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: transmitting, to a UE, an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and downlink control information messages associated with the random access procedure, the scheduling of system information, or the paging procedure, encoding the first downlink control information in the first set of common search spaces based on the first set of common search spaces being configured according to the acknowledgement rule, and transmitting the encoded first downlink control information.

Another apparatus for wireless communication at a base station is described. The apparatus may include: means for transmitting to a UE an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel comprising first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure, means for encoding the first downlink control information in the first set of common search spaces based on the first set of common search spaces being configured according to the acknowledgement rule, and means for transmitting the encoded first downlink control information.

A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: transmitting, to a UE, an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and downlink control information messages associated with the random access procedure, the scheduling of system information, or the paging procedure, encoding the first downlink control information in the first set of common search spaces based on the first set of common search spaces being configured according to the acknowledgement rule, and transmitting the encoded first downlink control information.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, the validation rule may be a type 0, type 0a, type 1 or type 2 common set of search spaces may not be linked to another set of search spaces.

In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, the validation rule may be that a set of common search spaces with index 0 may not be linked to another set of common search spaces.

Brief Description of Drawings

Fig. 1 illustrates an example of a wireless communication system supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the present disclosure.

Fig. 2 illustrates an example of a wireless communication system supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure.

Fig. 3 illustrates an example of a wireless communication system supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure.

Fig. 4 illustrates an example of a process flow diagram supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the present disclosure.

Fig. 5 and 6 illustrate block diagrams of devices supporting downlink channel repetition for a common set of search spaces, in accordance with aspects of the present disclosure.

Fig. 7 illustrates a block diagram of a communication manager supporting downlink channel repetition for a common set of search spaces, in accordance with aspects of the disclosure.

Fig. 8 illustrates a diagram of a system including a device that supports downlink channel repetition for a common set of search spaces, in accordance with aspects of the disclosure.

Fig. 9 and 10 illustrate block diagrams of devices supporting downlink channel repetition for a common set of search spaces, in accordance with aspects of the present disclosure.

Fig. 11 illustrates a block diagram of a communication manager supporting downlink channel repetition for a common set of search spaces, in accordance with aspects of the disclosure.

Fig. 12 illustrates a diagram of a system including a device supporting downlink channel repetition for a common set of search spaces, in accordance with aspects of the disclosure.

Fig. 13-18 illustrate flow diagrams that understand a method of supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the present disclosure.

Detailed Description

Some wireless communication systems may support Physical Downlink Control Channel (PDCCH) repetition to improve communication reliability and efficiency. That is, by repeating the PDCCH transmission, the receiving User Equipment (UE) may have a higher probability of successfully decoding the PDCCH and thus be able to identify various control information including scheduling information for other channels. When two PDCCH transmissions are repeated, they may be transmitted in different Sets of Search Spaces (SSs), and the different SS sets are indicated to the UE as linked SS sets. When the UE receives an indication that two SS sets carrying PDCCHs are linked, the UE identifies that the PDCCH in the latter one of the two SS sets is a repetition of the PDCCH in the first one of the two SS sets, which may support soft combining and decoding Downlink Control Information (DCI) of the two PDCCHs from the linked SS sets. Thus, to support PDCCH repetition, the UE may receive an indication that the SS set is linked.

The Common Search Space (CSS) set may be configured via a message transmitted by the base station to the UE. The CSS sets may be configured by the type or purpose of the PDCCH carried in those CSS sets. For example, the wireless communication system may support a configuration message indicating that the CSS set for any of PDCCH types 0, 0A, 1, and 2 is to be monitored for transmissions corresponding to the PDCCH type. However, the configuration message or other related signaling may not be configured to support the purpose of indicating to the UE that the CSS set is linked for PDCCH repetition of these types of PDCCHs.

Implementations described herein provide techniques for indicating to a UE that two CSS sets for type 0/0A/1/2 PDCCH are linked. For example, when two CSS sets are configured as linked CSS sets and the UE is instructed to monitor (e.g., using a PDCCH configuration message) one of the two linked CSS sets, the two CSS sets may be linked for PDCCH repetition of the indicated type. In some examples, the PDCCH configuration message may be updated to support indications of multiple CSS sets. Thus, using these techniques, the UE may be configured to monitor the two linked CSS sets to decode DCI associated with the CSS set type.

Additional techniques described herein support determining the number of PDCCH candidates per aggregation level when a given type of PDCCH repetition is activated. For example, the number of candidates per aggregation level may be assigned to or distributed among the CSS sets. Further technical support links CSS sets when one of the sets has an index of 0 and a UE capability report for supporting PDCCH repetition of a given type. These and other techniques are further described with reference to the accompanying drawings.

Aspects of the present disclosure are initially described in the context of a wireless communication system. Aspects of the present disclosure are further described with reference to a wireless communication system illustrating PDCCH repetition and a process flow diagram illustrating signaling and processing supporting PDCCH repetition. Aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flowcharts relating to downlink channel repetition for a common set of search spaces.

Fig. 1 illustrates an example of a wireless communication system 100 supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-advanced (LTE-a) network, an LTE-a Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low cost and low complexity devices, or any combination thereof.

The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100 and may be different forms of devices or devices with different capabilities. The base station 105 and the UE 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 and ues 115 and base stations 105 may establish one or more communication links 125 over the coverage area 110. Coverage area 110 may be an example of a geographic area over which base station 105 and UE 115 may support signal communications in accordance with one or more radio access technologies.

The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. Each UE 115 may be a different form of device or a device with different capabilities. Some example UEs 115 are illustrated in fig. 1. The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated Access and Backhaul (IAB) nodes, or other network equipment), as shown in fig. 1.

Each base station 105 may communicate with the core network 130, or with each other, or both. For example, the 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). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105), or indirectly (e.g., via the core network 130), or both directly and indirectly over the backhaul link 120 (e.g., via an X2, xn, or other interface). In some examples, the backhaul link 120 may be or include one or more wireless links.

One or more of the base stations 105 described herein may include or may be referred to by those of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a node B, an evolved node B (eNB), a next generation node B or a giganode B (any of which may be referred to as a gNB), a home node B, a home evolved node B, or other suitable terminology.

UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where "device" may also be referred to as a unit, station, terminal, client, or the like. The UE 115 may also include or be referred to as a personal electronic device, such as a cellular telephone, a Personal Digital Assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, the UE 115 may include or be referred to as a Wireless Local Loop (WLL) station, an internet of things (IoT) device, a internet of everything (IoE) device, or a Machine Type Communication (MTC) device, etc., which may be implemented in various objects such as appliances or vehicles, meters, etc.

The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115 that may sometimes act as relays, as well as base stations 105 and network equipment including macro enbs or gnbs, small cell enbs or gnbs, relay base stations, etc., as shown in fig. 1.

The UE 115 and the base station 105 may wirelessly communicate with each other over one or more carriers via one or more communication links 125. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, the carrier for the communication link 125 may include a portion (e.g., a bandwidth portion (BWP)) of the radio frequency spectrum band that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE-A, LTE-a Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling to coordinate carrier operation, user data, or other signaling. The wireless communication system 100 may support communication with UEs 115 using carrier aggregation or multi-carrier operation. The UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with Frequency Division Duplex (FDD) and Time Division Duplex (TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. The carrier may be associated with a frequency channel, such as an evolved universal mobile telecommunications system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN), and may be positioned according to a channel grid for discovery by the UE 115. The carrier may operate in a standalone mode, in which initial acquisition and connection may be made by the UE 115 via the carrier, or the carrier may operate in a non-standalone mode, in which connections are anchored using different carriers (e.g., different carriers of the same or different radio access technologies).

The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. The carrier may carry downlink or uplink communications (e.g., in FDD mode), or may be configured to carry downlink and uplink communications (e.g., in TDD mode).

The carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)) of a carrier of a particular radio access technology. Devices of the wireless communication system 100 (e.g., the base station 105, the UE 115, or both) may have a hardware configuration that supports communication over a particular carrier bandwidth or may be configurable to support communication over one carrier bandwidth in a set of carrier bandwidths. In some examples, wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate over part (e.g., sub-band, BWP) or all of the carrier bandwidth.

The signal waveform transmitted on the carrier may include a plurality of subcarriers (e.g., using a multi-carrier modulation (MCM) technique such as Orthogonal Frequency Division Multiplexing (OFDM) or discrete fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, the resource elements may include one symbol period (e.g., duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the code rate of the modulation scheme, or both). Thus, the more resource elements that the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate of the UE 115 may be. The wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further improve the data rate or data integrity of the communication with the UE 115.

One or more parameter designs for the carrier may be supported, where the parameter designs may include a subcarrier spacing (Δf) and a cyclic prefix. The carrier may be divided into one or more BWP with the same or different parameter designs. In some examples, UE 115 may be configured with multiple BWP. In some examples, a single BWP for a carrier may be active at a given time, and communications for UE 115 may be limited to one or more active BWPs.

The time interval of the base station 105 or the UE 115 may be expressed in multiples of a basic time unit, which may refer to, for example, a sampling period T _s ＝1/(Δf _max ·N _f ) Second, Δf _max Can represent the maximum supported subcarrier spacing, and N _f The maximum supported Discrete Fourier Transform (DFT) size may be represented. The time intervals of the communication resources may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

Each frame may include a plurality of consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on the subcarrier spacing. Each slot may include several symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-slots containing one or more symbols. Before the elimination cycleEach symbol period may contain one or more (e.g., N _f A number) of sampling periods. The duration of the symbol period may depend on the subcarrier spacing or the operating frequency band.

A subframe, slot, mini-slot, or symbol may be a minimum scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a Transmission Time Interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in 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 (sTTI)).

The physical channels may be multiplexed on the carrier according to various techniques. The physical control channels and physical data channels may be multiplexed on the downlink carrier, for example, using one or more of Time Division Multiplexing (TDM) techniques, frequency Division Multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. The control region (e.g., control resource set (CORESET)) for the physical control channel may be defined by a number of symbol periods and may extend across a system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., core) may be configured for the set of UEs 115. For example, one or more of the UEs 115 may monitor or search the control region for control information according to one or more sets of search spaces, and each set of search spaces may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level for control channel candidates may refer to the number of control channel resources (e.g., control Channel Elements (CCEs)) associated with encoded information for a control information format having a given payload size. The set of search spaces may include a common set of search spaces configured to transmit control information to a plurality of UEs 115 and a set of UE-specific search spaces configured to transmit control information to a particular UE 115.

Each base station 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity for communicating with a base station 105 (e.g., on a carrier) and may be associated with an identifier (e.g., a Physical Cell Identifier (PCID), a Virtual Cell Identifier (VCID), or otherwise) for distinguishing between neighboring cells. In some examples, a cell may also refer to a geographic coverage area 110 or a portion (e.g., a sector) of geographic coverage area 110 over which a logical communication entity operates. Such cells may range from a smaller area (e.g., structure, subset of structures) to a larger area depending on various factors, such as the capabilities of the base station 105. For example, a cell may be or include a building, a subset of buildings, or an external space between geographic coverage areas 110 or overlapping geographic coverage areas 110, among other examples.

The macro cell typically covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 115 with service subscription with network providers supporting the macro cell. The small cell may be associated with a lower power base station 105 (as compared to the macro cell), and the small cell may operate in the same or different (e.g., licensed, unlicensed) frequency band as the macro cell. The small cell may provide unrestricted access to UEs 115 with service subscription with the network provider or may provide restricted access to UEs 115 with association with the small cell (e.g., UEs 115 in a Closed Subscriber Group (CSG), UEs 115 associated with users in a home or office). The base station 105 may support one or more cells and may also support communication over the one or more cells using one or more component carriers.

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 may provide access for different types of devices.

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

The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be substantially aligned in time. For asynchronous operation, the base stations 105 may have different frame timings, and transmissions from different base stations 105 may not be aligned in time in some examples. The techniques described herein may be used for synchronous or asynchronous operation.

Some UEs 115, such as MTC or IoT devices, may be low cost or low complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to a data communication technology that allows devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communications or MTC may include communications from devices integrated with sensors or meters to measure or capture information and relay such information to a central server or application that utilizes or presents the information to a person interacting with the application. Some UEs 115 may be designed to collect information or to implement automated behavior of a machine or other device. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, health care monitoring, field survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communications may be performed with reduced peak rates. Other power saving techniques for UE 115 include entering a power saving deep sleep mode when not engaged in active communications, operating over a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs 115 may be configured for operation using a narrowband protocol type associated with a defined portion or range (e.g., a subcarrier or set of Resource Blocks (RBs)) within, within a guard band of, or outside of a carrier.

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

In some examples, the UE 115 may also be capable of communicating directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using peer-to-peer (P2P) or D2D protocols). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in such a group may be outside of the geographic coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some examples, groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system in which each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates scheduling of resources for D2D communications. In other cases, D2D communication is performed between UEs 115 without involving base station 105.

In some systems, D2D communication link 135 may be an example of a communication channel (such as a side link communication channel) between vehicles (e.g., UEs 115). In some examples, the vehicles may communicate using vehicle-to-vehicle (V2V) communications, or some combination of these communications. The vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergency, or any other information related to the V2X system. In some examples, vehicles in the V2X system may communicate with a roadside infrastructure, such as a roadside unit, or with a network, or with both, via one or more network nodes (e.g., base stations 105) using vehicle-to-network (V2N) communications.

The core network 130 may provide user authentication, access authorization, tracking, internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an Evolved Packet Core (EPC) or a 5G core (5 GC), which may include at least one control plane entity (e.g., a Mobility Management Entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a User Plane Function (UPF)) that routes packets or interconnects to an external network. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets may be communicated through a user plane entity that may provide IP address assignment, as well as other functions. The user plane entity may be connected to IP services 150 of 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.

Some network devices, such as base station 105, may include subcomponents, such as access network entity 140, which may be an example of an Access Node Controller (ANC). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as radio heads, intelligent radio heads, or transmission/reception points (TRPs). Each access network transport 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 incorporated into a single network device (e.g., base station 105).

The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, a region of 300MHz to 3GHz is called a Ultra High Frequency (UHF) region or a decimeter band because the wavelength ranges from about 1 decimeter to 1 meter long. UHF waves may be blocked or redirected by building and environmental features, but these waves may penetrate various structures for macro cells sufficiently to serve UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 km) than transmission of smaller and longer waves using High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum below 300 MHz.

The wireless communication system 100 may also operate in an ultra-high frequency (SHF) region using a frequency band from 3GHz to 30GHz (also referred to as a centimeter frequency band) or in an extremely-high frequency (EHF) region of a frequency spectrum (e.g., from 30GHz to 300 GHz) (also referred to as a millimeter frequency band). In some examples, wireless communication system 100 may support millimeter wave (mmW) communication between UE 115 and base station 105, and EHF antennas of respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may experience even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the frequency band usage specified across these frequency regions may vary from country to country or regulatory agency to regulatory agency.

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

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

Base station 105 or UE 115 may utilize multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers using MIMO communication. Such techniques may be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Likewise, the receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the plurality of signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or a different data stream (e.g., a different codeword). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) in which multiple spatial layers are transmitted to the same receiver device; and multi-user MIMO (MU-MIMO), wherein the plurality of spatial layers are transmitted to the plurality of devices.

Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., base station 105, UE 115) to shape or steer antenna beams (e.g., transmit beams, receive beams) along a spatial path between the transmitting device and the receiving device. Beamforming may be implemented by combining signals communicated via antenna elements of an antenna array such that some signals propagating in a particular orientation relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjustment of the signal communicated via the antenna element may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both, to the signal carried via the antenna element associated with the device. The adjustment associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., with respect to an antenna array of a transmitting device or a receiving device, or with respect to some other orientation).

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

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

In some examples, the transmission by the device (e.g., by the base station 105 or the UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from the base station 105 to the UE 115). The UE 115 may report feedback indicating precoding weights for one or more beam directions and the feedback may correspond to a configured number of beams across a system bandwidth or one or more subbands. The base station 105 may transmit reference signals (e.g., cell-specific reference signals (CRSs), channel state information reference signals (CSI-RS)) that may be precoded or not precoded. The UE 115 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). Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by UE 115) or for transmitting signals in a single direction (e.g., for transmitting data to a recipient device).

The receiving device (e.g., UE 115) may attempt multiple reception configurations (e.g., directed listening) upon receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from the base station 105. For example, the recipient device may attempt multiple directions of reception by: the received signals are received via different antenna sub-arrays, processed according to different antenna sub-arrays, received according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array (e.g., different sets of directional listening weights), or processed according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array, any of which may be referred to as "listening" according to different receive configurations or receive directions. In some examples, the recipient device may use a single receive configuration to receive in a single beam direction (e.g., when receiving the data signal). A single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. At the user plane, the communication of the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority handling and multiplex logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmission by the MAC layer to improve link efficiency. In the control plane, a Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between the UE 115 and the base station 105 or the core network 130 supporting radio bearers of user plane data. At the physical layer, transport channels may be mapped to physical channels.

The UE 115 and the base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technique for increasing the likelihood that data is properly received over the communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward Error Correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput of the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support simultaneous slot HARQ feedback, where the device may provide HARQ feedback in a particular slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

The wireless communication system 100 may support channel repetition in order to increase communication reliability. For example, the base station 105 may repeat the PDCCH transmission to increase the likelihood that the recipient UE 115 decodes the DCI of the PDCCH and thereby identify the control and scheduling information. The linked set of SSs may include repeated PDCCH transmissions, and the linked set of SSs may be indicated to UE 115 as the linked set of SSs. As such, UE 115 may be able to soft combine PDCCH transmissions from linked SS sets in order to decode the DCI (e.g., the same DCI payload may be transmitted in PDCCH repetition).

The CSS set may be configured at the UE 115 via a message transmitted by the base station 105. In some examples, the CSS set may be configured by the type or purpose of PDCCH carried in the CSS set. For example, the type 0, type 0A, type 1, and type 2 PDCCH-CSS sets may be indicated to UE 115 using a common PDCCH message. However, the configuration message and other related messages may not support an indication of PDCCH-CSS set links for PDCCH repetition for these types of PDCCHs. For example, the type 0 and 0A PDCCH-CSS sets may be related to scheduling of system information; the type 1 PDCCH-CSS set may support a random access procedure and the type 2 PDCCH-CSS set may support paging. Since the configuration message may not support an indication of the repeated CSS set links to support these PDCCH types, these types of PDCCHs may be unreliable or inefficient (e.g., may not support repetition to increase decoding likelihood at the UE).

The techniques described herein provide signaling to support PDCCH repetition for the type 0, 0A, 1, and 2 PDCCH-CSS sets. The signaling may include a first control message indicating a configuration for repetitively linking two CSS sets and a second control message indicating that at least one of the two CSS sets is to be monitored by the UE 115 for PDCCH transmissions. Based on an indication of one of the linked CSS sets by a second control message (e.g., PDCCH-ConfigCommon (PDCCH-configuration common) message), the CSS sets may be linked for repetition of the PDCCH type indicated by the second control message. Additionally or alternatively, the control message may indicate that the first index corresponding to the first CSS set and the second index corresponding to the second CSS set correspond to the same common search space set type (e.g., PDCCH type 0, 0A, 1, or 2 PDCCH-CSS sets), thereby indicating that these CSS sets are linked for PDCCH repetition.

Further techniques described herein support PDCCH repetition, including techniques for identifying the number of control channel candidates (e.g., PDCCH candidates, search spaces, or some other candidate time and/or frequency locations of downlink resources) per aggregation level in a CSS set, techniques for CSS set monitoring when one of the linked CSS sets has an index of 0, and PDCCH repetition capability signaling. Thus, the described techniques may generally support PDCCH repetition, which may increase communication reliability and efficiency in a communication system by increasing the likelihood that UE 115 successfully decodes DCI from a PDCCH transmission.

Fig. 2 illustrates an example of a wireless communication system 200 supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure. Wireless communication system 200 may implement aspects of wireless communication system 100. For example, wireless communication system 200 includes base station 105-a and UE 115-a, which may be examples of corresponding devices with reference to fig. 1. Fig. 2 illustrates an example of communication 205 between a base station 105-a and a UE 115-a. The wireless communication system may support PDCCH repetition, wherein linked PDCCHs are transmitted in a corresponding linked set of SSs.

To support PDCCH blind decoding, the base station 105-a may configure the UE 115-a with a set of control resource sets (CORESET) in the bandwidth portion of the serving cell. Each CORESET may be associated with an active Transmission Configuration Indicator (TCI) state. RRC signaling may be used to configure the resource blocks in the frequency domain and the number of symbols of CORESET as part of CORESET configuration. The PDCCH SS set may be associated with one CORESET and may determine an upper limit (e.g., 10) set of search spaces in the bandwidth portion of the component carrier/serving cell. Control signaling, such as RRC signaling, may be used to configure a set of search spaces with associated CORESET identifiers, monitor slot periodicity and offset, monitor symbols within a slot (e.g., to determine PDCCH monitoring occasions for the set of search spaces), search space set type (e.g., a set of CSSs or UE-specific SS (USS) sets), DCI format to monitor, and number of PDCCH candidates for a given aggregation level.

PDCCH candidates may be defined as part of a search space set configuration. PDCCH candidates having a given aggregation level and a given candidate index are defined in a given set of search spaces. The DCI may be received in one PDCCH candidate and UE 115-a may monitor the PDCCH candidates in the search space set to identify and decode the DCI. One or more candidates with cyclic redundancy check pass (successful decoding) may correspond to the decoded DCI, and UE 115-a may blindly decode the DCI.

As described herein, the wireless communication system 200 may support PDCCH repetition, where each repetition is a PDCCH candidate. Both PDCCH candidates may carry the same DCI and thus may be considered "linked". The two linked PDCCH candidates may have the same aggregation level (the same number of control channel elements), and the DCI payloads transmitted using the two PDCCH candidates may be the same. UE 115-a may perform soft combining of multiple PDCCH candidates to decode the DCI. To support soft combining, UE 115-a may be configured to identify linked PDCCH candidates. To support linking, two sets of search spaces (carrying PDCCH candidates) may be linked via control signaling (such as RRC signaling). The monitoring opportunities for the two linked sets of search spaces may be mapped one-to-one. PDCCH candidates having the same aggregation level and the same candidate index in the two linked search space sets may be linked, and the two linked search space sets may be configured to have the same number of candidates for each aggregation level.

The first set of SSs 240 and the second set of SSs 245 are illustrated in a slot 250. Arrows across the first SS set 240 and the second SS set 245 illustrate linked PDCCH candidates within the respective search space sets. Communications 205-a and 205-b illustrate possible search space set configurations, but it should be understood that other configurations are contemplated within the scope of the present disclosure.

The wireless communication system 200 may support various types of PDCCH SS sets. Example CSS sets include type 0, type 0A, type 1, type 2, and type 3 PDCCH-CSS sets. The USS set may also be supported by the wireless communication system 200 and may be configured using various fields of control signaling. The type 0-PDCCH CSS set may be configured by a PDCCH-ConfigSIB1 (PDCCH-configuration SIB 1) field in a Master Information Block (MIB) or by searchspace zero in PDCCH-ConfigCommon (system information block) with a Cyclic Redundancy Check (CRC) scrambled by a system information radio network temporary identifier (SI-RNTI) on a master cell in a Master Cell Group (MCG) or by searchspace zero in PDCCH-ConfigCommon. The type 0A-PDCCH CSS set may be configured by searchSpaceOtherSystemInformation in PDCCH-ConfigCommon for DCI formats with CRCs scrambled with SI-RNTI on the primary cell of the MCG. The type 1-PDCCH CSS set may be configured by RA-SearchSpace in PDCCH-ConfigCommon for DCI formats with CRCs scrambled by random access RNTI (RA-RNTI), msgB-RNTI, or temporary cell RNTI (TC-RNTI) on the primary cell. The type 2-PDCCH CSS set may be configured by the paging search space in PDCCH-ConfigCommon for DCI formats with CRCs scrambled by paging RNTI (P-RNTI) on the primary cell of the MCG. The type 3-PDCCH CSS set may be configured by the searspace in PDCCH-confgcommon with searspace type (search space type) =common (common) in PDCCH-confgcommon with CRC scrambled by interrupt RNTI (INT-RNTI), slot format indication RNTI (SFI-RNTI), transmission Power Control (TPC) Physical Uplink Shared Channel (PUSCH) RNTI (TPC-PUSCH-RNTI), TPC sounding reference signal RNTI (TPC-SRS-RNTI) or channel state RNTI (CS-RNTI) and for the primary cell RNTI (C-RNTI), modulation and coding scheme cell RNTI (MCS-C-RNTI), channel state RNTI (CS-RNTI) or power saving RNTI). USS may be configured by SearchSpace in PDCCH-Config (PDCCH-configuration) with searchspace=ue-Specific (ue Specific) for DCI formats with CRCs scrambled by C-RNTI, MCS-C-RNTI, semi-persistent CSI-RNTI (SP-CSI-RNTI), CS-RNTI, side link RNTI (SL-RNTI), SL-CS-RNTI, or SL semi-persistent scheduling V-RNTI.

The type 0-PDCCH CSS set and the type 0A-PDCCH CSS may be used to carry DCI for scheduling or acquiring system information. The type 1-PDCCH CSS set may be used to carry DCI for scheduling Msg2 in a random access procedure, and in some cases, the DCI that schedules Msg2 may be referred to as at least a portion of Msg2 in a random access procedure. The type 2-PDCCH CSS set may be used to carry DCI associated with a paging procedure. In addition, as discussed herein, the type 0, 0A, 1, 2 PDCCH CSS sets may be configured by PDCCH-ConfigCommon messages, while the type 3-PDCCH CSS sets and USS sets may be configured using the SearchSpace message in PDCCH-Config messages. More specifically, the type 3 and PDCCH USS sets may be configured differently than the type 0, 0A, 1, and 2 PDCCH CSS sets.

The PDCCH-ConfigCommon message (e.g., an RRC message) that may be used to indicate to the UE 115-b which SS sets to monitor for the corresponding PDCCH type may include a mapping of various types of common search space sets to search space set identifiers or indexes. For example, the PDCCH-ConfigCommon message may include a mapping of searchSpaceZero, searchSpaceSIB1, searchSpaceOtherSystemInformation, pagingSearchSpace and ra-SearchSpace common search space sets to respective SS identifiers/indices. SearchSpacezero (e.g., search space with index 0) may be a set of SSs configured in the initial BWP (BWP#0) and may be indicated by a MIB or by PDCCH-ConfigCommon. SearchSpacezero may be characterized by integer values between 0 and 15 (e.g., via MIB or PDCCH-ConfigCommon), and the attributes of the SS set (e.g., including time domain behavior of the monitoring occasions) may be based on a fixed table that is preconfigured and corresponds to the indicated integer values. Other sets of search spaces in the PDCCH-ConfigCommon message may be configured using RRC signaling (e.g., a SearchSpace IE), as described herein. More specifically, RRC signaling may be used to configure various parameters or characteristics of the search space set, such as SS set index/ID, CORESET ID, monitoring slot periodicity and offset, and the like. For example, the SearchSpace IE may include a SearchSpace id field (which may not be 0) and other parameters for the SS set.

For type 0, 0A, 1, 2-PDCCH CSS sets, the corresponding SearchSpace id is configured for SearchSpace ib1 (type 0), searchSpace other system information (type 0A), ra-SearchSpace (type 1), pattenssetspace (type 2) in the PDCCH-ConfigCommon message. In some examples, there may be one SS set for each type configured, and the same SS set for two or more of these PDCCH types may be configured. Thus, indices/IDs for these SS set types may be configured using the SearchSpace IE, and these configured indices/IDs may be indicated as corresponding to a particular CSS set type using the indication in the PDCCH-ConfigCommon message. The type 3-PDCCH CSS set and USS set may be configured directly in the SearchSpace IE. Two or more SS sets for each of these PDCCH types (e.g., type 3 and USS) may be configured.

For a type 3 CSS set or USS set, PDCCH repetition may be configured and enabled by associating or linking two SS sets configured for the SS set. In addition, the two linked SS sets may be configured to have the same periodicity, offset, duration, number of monitoring occasions within a slot, SS set type (CSS or USS), DCI format to monitor, and/or number of candidates for each aggregation level. For the type 0, 0A, 1 and 2 PDCCH CSS sets, the SS identifier may be configured separately for each type.

Implementations described herein provide signaling techniques to support or prevent PDCCH repetition. According to example implementations described herein, a UE (such as UE 115-a) may not desire that SS sets configured for each of these CSS set types (0, 0A, 1, and 2) be linked to another SS set according to an validation rule applied by the UE. Thus, the base station 105-b may be configured not to indicate SS set identifiers for one of these types that are linked to another SS set.

Other implementations described herein provide signaling techniques to support PDCCH repetition using type 0, 0A, 1, and 2PDCCH-CSS sets. More specifically, these signaling techniques support linking CSS sets for these CSS set types. In one example signaling technique, if the PDCCH-ConfigCommon message indicates an SS set identifier corresponding to an SS set that is linked (e.g., using RRC configuration) to another SS set, PDCCH repetition is configured for that PDCCH CSS set type. Thus, the first control message (e.g., RRC) may include a configuration to link the first SS set 240 with the second SS set 245 for PDCCH repetition. The second control message (e.g., PDCCH-ConfigCommon) may indicate an identifier for one of the CSS set types, corresponding to the first SS set 240 or the second SS set 245 linked by the configuration, resulting in PDCCH repetition for the corresponding PDCCH type.

According to another repeated signaling technique, the RRC configuration under PDCCH-ConfigCommon may be updated to support two SS identifiers for each PDCCH type. More specifically, searchSpace ib1 (type 0), searchSpace other system information (type 0A), ra-SearchSpace (type 1), and/or pagengsearchspace (type 2) in PDCCH-ConfigCommon may point to two SS set identifiers, thereby activating PDCCH repetition for the corresponding PDCCH type. For example, the pagesetspace field may include a first index corresponding to the first SS set 240 and a second index corresponding to the second SS set 245, thereby activating type 2-PDCCH repetition in the first SS set 240 and the second SS set 245.

As described herein, when the first SS set 240 and the second SS set 245 are linked, the configuration limitations described herein (e.g., the same periodicity, offset, number of monitoring occasions within a slot or transmission time interval, SS set type (CSS or USS), DCI format to be monitored, number of candidates for each aggregation level) may be applied. When the UE 115-a determines that PDCCH repetition is configured via either of these described signaling techniques, the UE 115-a may monitor linked PDCCH candidates across two linked monitoring occasions of two linked SS sets to find PDCCH repetition for DCI formats with CRCs scrambled by SI-RNTI (type 0/0A), RA-RNTI/MSGB-RNTI/TC-RNTI (type 1) or P-RNTI (type 2). Further considerations and capability signaling for these types of PDCCH repetition are further described herein.

Fig. 3 illustrates an example of a wireless communication system 300 supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure. Wireless communication system 300 may implement aspects of wireless communication system 100. For example, wireless communication system 300 may include base station 105-b and UE 115-b, which may be examples of corresponding devices described with reference to fig. 1 and 2. Fig. 3 illustrates an example of communication 320 between base station 105-b and UE 115-b. The wireless communication system 300 may support PDCCH repetition, wherein linked PDCCHs are transmitted in a corresponding linked set of SSs.

As described herein, various types of signaling may be used to configure UE 115-b for PDCCH repetition for the type 0, 0A, 1, and 2 PDCCH-CSS sets. In some examples, the base station 105-b may transmit a first control message 305, the first control message 305 indicating a search space set configuration for repeating linking the first CSS set 340 with the second CSS set 345. The same or different configurations may also specify configuration parameters for the first CSS set 340 and the second CSS set 345, such as periodicity, offset, number of monitoring occasions within a slot, search space set type, DCI format to monitor, number of candidates for each aggregation level, etc. These parameters may be the same in order to support PDCCH repetition. The base station 105-b may also transmit a second control message 310 (e.g., PDCCH-ConfigCommon (PDCCH configuration common)), the second control message 310 indicating an index or identifier corresponding to the first CSS set 340 or the second CSS set 345. Since the first CSS set 340 and the second CSS set 345 are linked by configuration, the PDCCH repetition will be configured by the indication of the index of one of the CSS sets by the second control message.

According to another implementation, the control message 310 (e.g., PDCCH-ConfigCommon) may indicate, for one of the PDCCH CSS set types, an index or identifier corresponding to the first CSS set 340 and an index or identifier corresponding to the second CSS set 345, thereby configuring PDCCH repetition for that PDCCH CSS set type using the indicated CSS set. As illustrated in the second control message 310-a, the SearchSpace 1 CSS set type indicates search space set identifiers 3 and 5, which may indicate that CSS sets (e.g., configured via separate SearchSpace IE messages) corresponding to those identifiers are linked for repetition of type 0 PDCCH. Thus, using any of these signaling techniques, UE 115-a may monitor first CSS set 340 and second CSS set 345 for a PDCCH carrying DCI. In some cases, UE 115b may soft combine DCI from first CSS set 340 and second CSS set 345 for decoding.

When UE 115-a is configured with a type 0, 0A, or 2 PDCCH-CSS set, a table mapping aggregation levels to number of candidates may be used to determine the number of PDCCH candidates per aggregation level. For example, there may be 4 PDCCH candidates for control channel element aggregation level 4 in the CSS set, 2 PDCCH candidates for control channel element aggregation level 8 in the CSS set, and 1 PDCCH candidate for control channel element aggregation level 16 in the CSS set. If UE 115-a is configured with PDCCH repetition for type 0, 0A or 2 PDCCH-CSS sets, it may not be clear how to apply these mappings of PDCCH candidates to control channel element aggregation levels.

When UE 115-b is configured with PDCCH repetitions for a type 0, 0A, or 2 PDCCH-CS set, the techniques described herein support using one or more options to determine the number of PDCCH candidates for each aggregation level. According to a first option, the number of linked PDCCH candidate pairs for each aggregation level (e.g., 4, 8, and 16) may be based on the mapping (e.g., mapping table) described above. Thus, the total number of PDCCH candidates for each PDCCH type may be twice the number listed in the table or in the map. For example, according to this option, at aggregation level 8, the first CSS set 340 may have two PDCCH candidates and the second CSS set may have two PDCCH candidates, with each of the two candidates in the first CSS set 340 being linked to a respective PDCCH candidate in the second CSS set 345.

According to a second option for determining the number of PDCCH candidates for the linked types 0, 0A and 2 PDCCH CSS sets, the number of linked PDCCH candidate pairs for each aggregation level (e.g., 4, 8 and 16) of each CSS set may be based on half the number in the map or table. As such, each of the two linked SS sets has half of the candidates listed in the table or map. For example, according to this option, at aggregation level 8, the first set of CSSs 340 may have one PDCCH candidate (e.g., half of two) and the second set of CSSs 345 may have one PDCCH candidate, with the candidates in the first set of CSSs 340 linked to the candidates in the second set of CSSs 345.

According to a third option for determining the number of PDCCH candidates for the linked types 0, 0A and 2 PDCCH CSS sets. The selection between the first option and the second option described above may depend on whether the linked candidates are in the same time slot (e.g., whether the first set 340 of CSSs and the second set 345 of CSSs are positioned within the same transmission time interval or time slot-in a time slot or time slot configuration). For example, for intra-slot repetition, when two linked monitoring opportunities associated with two linked CSS sets are in the same slot, the number of linked PDCCH candidate pairs for each aggregation level may be half the number mapped (e.g., the second option above). For inter-slot repetition, the number of linked PDCCH candidate pairs for each aggregation level is based on the number of mapped (e.g., the first option above) when the two linked monitoring opportunities associated with the two linked CSS sets are in different slots. The technique may ensure that the number of candidates per slot remains the same regardless of whether PDCCH repetition is configured.

In some cases, a mapping or table is used when one of the linked CSS sets is the CSS set with index 0 ("SearchSpaceZero"). Thus, when one of the linked sets is the SearchSpaceZero set, the three options described herein can be applied. Otherwise, the number of PDCCH candidates for each aggregation level may be RRC configured for each of the two linked CSS sets, and the number should be the same across the two linked CSS sets. As described herein, the number of candidates may not be configured via RRC for SS sets with index 0, as the SearchSpaceZero set may be based on a fixed or mapped configuration.

As described herein, some configuration restrictions may be applied to two linked SS sets such that there is a one-to-one mapping for monitoring opportunities between the two linked SS sets. For example, for PDCCH repetition within a slot, the periodicity, offset, duration, and number of monitoring occasions within a slot may be the same across the two SS sets. However, for SS set 0, these parameters may not be directly configured. In contrast, a value between 0 and 15 (indicated in MIB or PDCCH-ConfigCommon) defines a monitoring occasion (e.g., frame, slot, symbol of the monitoring occasion) based on a fixed table that can be preconfigured. These tables may specify these configurations corresponding to FR1, FR2, various multiplexing modes, etc. In addition, some configurations within the table may be dependent on the most recent Synchronization Signal Block (SSB) index i. SSB may be determined based on the following updates: (1) A MAC-CE activation command indicating a TCI state including an active bandwidth portion of CORESET with index 0, wherein the TCI state includes a CSI-RS quasi co-located with a Synchronization Signal (SS) or Physical Broadcast Channel (PBCH) block, or (2) a random access procedure not initiated by a PDCCH command triggering a contention-free random access procedure. As a result of various circumstances, SSB indexes may change over time, which may result in a configuration change of CSS set 0, which may be linked to another CSS set, resulting in unclear mapping of monitoring opportunities between sets if linked.

According to a first option, UE 115-b may not desire an SS set identifier of 0 for either of the two linked SS sets according to the validation rule applied by UE 115-b. That is, base station 105-a may not configure SS set 0 to link with another SS set, and as such, PDCCH repetition may not be applicable to PDCCH candidates in SS set 0.

According to a second option, SS set 0 linking may be supported by ensuring that another linked SS set is configured with RRC parameters (such as periodicity, slot offset, duration, monitoring symbols within a slot) such that the monitoring occasions of the linked SS set map one-to-one with the monitoring occasions of SS set 0. . For example, if SS set 0 is to be used as a linked SS set for PDCCH repetition, then base station 105-a will configure another linked SS set such that monitoring opportunities are one-to-one mapped. For SS set 0, these parameters may not be directly configured. For example, a value between 0-15 (indicated in MIB or PDCCH-ConfigCommon) defines a monitoring occasion (e.g., frame, slot, symbol of the monitoring occasion) of SS set 0 based on a fixed table, and another linked set may be configured with corresponding parameters via RRC.

According to a third option, if one of the two linked SS sets is SS set 0, for monitoring of the type 0, 0A, 1, 2-PDCCH CSS set, the monitoring occasion of the other SS set mapped to the monitoring occasion of SS set 0 is monitored, and the additional configured monitoring occasion of the other SS set may not be monitored. The mapping between the monitoring occasions of SS set 0 and another SS set may be based on being in the same time slot (for the intra-slot case), or in consecutive time slots (for the inter-slot case), and also based on the number of monitoring occasions of SS set 0 over the duration. For example, if SS set 0 has 10 monitoring occasions within an x millisecond duration and another SS set is configured with 30 monitoring occasions within the same duration, then 10 pairs of monitoring occasions may be one-to-one mapped and thus monitored by UE 115-b. Thus, since the monitoring configuration of SS set 0 may change due to a change in SSB index, the technique may ensure that the mapped monitoring occasions are monitored for PDCCH repetition regardless of the change in configuration.

To support PDCCH repetition for the type 0, 0A, 1, and 2PDCCH CSS sets, UE 115-b may indicate to base station 105-b its ability to support these types of PDCCH repetition. In one example, one bit may indicate the capability of the UE to support each of the PDCCH types of types 0, 0A, 1, and 2. In another example, separate bits may be used to indicate support for some or all types separately (e.g., using a bitmap or set of bits). In some cases, UE 115-b may indicate its support for PDCCH CSS sets based on the RNTI for the CRC of the associated DCI. For example, the UE 115-b may indicate support for SI-RNTI (types 0 and 0A) or RA-RNTI, MSGB-RNTI, TC-RNTI (type 1), and/or P-RNTI (type 2). UE 115-b may also indicate whether SS set 0 may be linked with any other SS set to aim at PDCCH repetition for type 0, 0A, 1, 2PDCCH CSS set. Additionally or alternatively, UE 115-b may indicate whether PDCCH repetition for a type 0, 0A, 1, 2PDCCH CSS set is supported in an inter-slot configuration, an intra-slot configuration, or both. In some cases, any of these capability indications may be transmitted in connection with the UE's support for PDCCH repetition for USS sets and/or type 3CSS sets (preconditions relationships). As such, the RRC configuration (e.g., RRC configuration of the CSS set and PDCCH-ConfigCommon monitoring signaling) transmitted by the base station 105-b may be based on the UE capability indication. Thus, when the repetition is RRC configured, the UE 115-b may monitor the PDCCH of the type 0, 0A, 1, or 2PDCCH CSS set using the linked CSS set, the monitoring occasion, and the PDCCH candidate.

Thus, using the techniques described herein, UE 115-b may report its support for various types of PDCCH repetition. The base station 105-b may transmit the first control message 305 and/or the second control message 310 to configure the first CSS set 340 and the second CSS set 345 to be linked for PDCCH repetition based on the UE capability report. The UE 115-a may monitor the first CSS set 340 and the second CSS set 345 based on the indicated configuration in order to decode the DCI 315 encoded in the PDCCH candidate. In some cases, UE 115-b may determine the number of PDCCH candidates per aggregation level based on a table and/or configuration. In addition, if one of the linked sets is SS set 0, UE 115-a may determine a mapped monitoring occasion (e.g., configure mapped, or UE 115-b monitor for mapped monitoring occasions from the CSS set linked to SS set 0) using the techniques described herein.

Fig. 4 illustrates an example of a process flow diagram 400 supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure. Process flow diagram 400 may be implemented by aspects of wireless communication systems 100, 200, and 300 as described with reference to fig. 1-3. For example, process flow diagram 400 includes UE 115-c and base station 105-c, which may be examples of corresponding devices described with reference to fig. 1-3.

At 405, the UE 115-c may transmit an indication to the base station 105-c that the UE 115-c supports repetition of a downlink control channel including downlink control information (e.g., types 0, 0A, 1, and 2 PDCCH-CSS sets) associated with a random access procedure, scheduling of system information, a paging procedure, or a combination thereof. The indication may be based on the RNTI type and/or may specify support for linking the search space set with search space set 0. The indication may also specify support for inter-slot links (e.g., CSS sets are positioned between slots) and/or intra-slot links. The support may also be indicated with or based on support for UE-specific SS set links or type 3 SS set links. UE 115-c may transmit any combination of these support indications.

At 410 and/or 415, ue 115-c may receive an indication that the first and second sets of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure (e.g., type 0, 0A, 1, or 2 PDCCH-CSS setup link). In some cases, at 410, ue 115-c may receive a first control message including a configuration to repeatedly link a first set of common search spaces with a second set of common search spaces. The UE 115-c may receive a second control message indicating that the first set of common search spaces is to be monitored for a downlink control channel based at least in part on the downlink control information being associated with one of a random access procedure, a scheduling of system information, or a paging procedure. In some cases, UE 115-c may receive a control message indicating that both the first and second sets of common search spaces are linked and monitor the first and second sets of common search spaces for downlink control channels based at least in part on downlink control information being associated with one of a random access procedure, a scheduling of system information, or a paging procedure at 415. The control message may be an example of a common physical downlink control channel configuration message (e.g., PDCCH-ConfigCommon message) indicating that both a first index associated with a first common set of search spaces and a second index associated with a second common set of search spaces correspond to the same common set of search spaces type.

At 420, ue 115-c may determine a number of downlink control channel candidates for the first and second sets of common search spaces for control channel element aggregation levels of the set of control channel element aggregation levels. The UE 115-c may monitor the first set of common search spaces and the second set of common search spaces based at least in part on the determined number of downlink control channel candidates. In some cases, the number of downlink control channel candidates is determined based on a mapping between the aggregation level and the number of candidates. In some cases, the number of candidates is applied to each common set of search spaces, or half the number may be applied to each common set of search spaces. The determination of whether to apply the number to each set or half the number to each set may be based on whether the sets are located in the same TTI or in different TTIs. In some examples, the number of candidates may be RRC configured.

At 425, ue 115-c may determine monitoring opportunities for the first set of common search spaces and the second set of common search spaces. In some cases, the determination may be based on RRC configuration for each of the sets, which may have a one-to-one monitoring occasion mapping. However, in some examples, one of these sets may be SS set 0, and thus, the linked set may be RRC configured to match the monitoring occasion configuration of SS set 0. In other cases, when one of the linked CSS sets is SS set 0, UE 115-c may determine a monitoring occasion of the linked set to monitor the monitoring occasions mapped to SS set 0.

At 430, the base station 105-c may encode downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based at least in part on the indication. At 435, the base station 105-c may transmit encoded downlink control information to the UE 115-c in a first set of common search spaces including a first downlink control channel candidate and in a second set of common search spaces including a second downlink control channel candidate.

At 440, ue 115-c may decode downlink control information using at least one of a first physical downlink control channel candidate of a first set of common search spaces or a second physical downlink control channel candidate of a second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate. In some cases, the UE 115-c may communicate with the base station 105-c based on the decoded downlink control information, such as by acquiring system information from the base station 105-c, performing a random access procedure with the base station 105-c, or performing a paging procedure with the base station 105-c.

Fig. 5 illustrates a block diagram 500 of an apparatus 505 that supports downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure. The device 505 may be an example of aspects of the UE 115 as described herein. The device 505 may include a receiver 510, a transmitter 515, and a communication manager 520. The apparatus 505 may also include one or more processors, memory coupled with the one or more processors, and instructions stored in the memory, the instructions executable by the one or more processors to enable the one or more processors to perform the downlink channel repetition feature discussed herein. Each of these components may be in communication with each other (e.g., via one or more buses).

The receiver 510 may provide means for receiving information, such as packets associated with various information channels (e.g., control channels, data channels, information channels related to downlink channel repetition for a common set of search spaces), user data, control information, or any combination thereof. Information may be passed on to other components of the device 505. The receiver 510 may utilize a single antenna or a set comprising multiple antennas.

The transmitter 515 may provide means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to downlink channel repetition for a common set of search spaces), user data, control information, or any combination thereof. In some examples, the transmitter 515 may be co-located with the receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or a set comprising multiple antennas.

The communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of downlink channel repetition for a common set of search spaces as described herein. For example, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may support methods for performing one or more of the functions described herein.

In some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in hardware (e.g., in communication management circuitry). The hardware may include processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combinations thereof, configured or otherwise supporting the apparatus for performing the functions described in the present disclosure. In some examples, a processor and a memory coupled to the processor may be configured to perform one or more functions described herein (e.g., by the processor executing instructions stored in the memory).

Additionally or alternatively, in some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented by code (e.g., as communication management software or firmware) that is executed by a processor. If implemented in code executed by a processor, the functions of the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof, may be performed by a general purpose processor, a DSP, a Central Processing Unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., means configured or otherwise supported for performing the functions described herein).

In some examples, communication manager 520 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise in conjunction with receiver 510, transmitter 515, or both. For example, communication manager 520 may receive information from receiver 510, send information to transmitter 515, or be integrated with receiver 510, transmitter 515, or both to receive information, transmit information, or perform various other operations described herein.

According to examples disclosed herein, the communication manager 520 may support wireless communication at the UE. For example, the communication manager 520 may be configured or otherwise support means for receiving an indication that the first and second sets of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. The communication manager 520 may be configured or otherwise support means for monitoring the first and second sets of common search spaces for downlink control information based on the indication. The communication manager 520 may be configured or otherwise support means for decoding downlink control information using at least one of a first physical downlink control channel candidate of a first set of common search spaces or a second physical downlink control channel candidate of a second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

Additionally or alternatively, in accordance with examples disclosed herein, the communication manager 520 may support wireless communication at the UE. For example, the communication manager 520 may be configured or otherwise support means for receiving an indication that a first set of common search spaces is configured for a downlink control channel that includes first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule related to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure. The communication manager 520 may be configured or otherwise support means for monitoring a first set of common search spaces for downlink control channels based on the first set of common search spaces being configured according to an validation rule.

By including or configuring a communication manager 520 according to examples as described herein, a device 505 (e.g., a processor controlling or otherwise coupled to a receiver 510, a transmitter 515, a communication manager 520, or a combination thereof) may support techniques for more efficiently utilizing communication resources by configuring a UE to support control repetition, which may result in reduced processing overhead by increasing the probability of the UE receiving control information for communication. Fig. 6 illustrates a block diagram 600 of an apparatus 605 supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure. The device 605 may be an example of aspects of the device 505 or UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. The device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

The receiver 610 may provide means for receiving information, such as packets associated with various information channels (e.g., control channels, data channels, information channels related to downlink channel repetition for a common set of search spaces), user data, control information, or any combination thereof. Information may be passed on to other components of the device 605. The receiver 610 may utilize a single antenna or a set comprising multiple antennas.

The transmitter 615 may provide a means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to downlink channel repetition for a common set of search spaces), user data, control information, or any combination thereof. In some examples, the transmitter 615 may be co-located with the receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a set including multiple antennas.

The device 605 or various components thereof may be an example of an apparatus for performing aspects of downlink channel repetition for a common set of search spaces as described herein. For example, the communication manager 620 can include a search space set configuration interface 625, a search space set monitoring component 630, a decoding component 635, or any combination thereof. Communication manager 620 may be an example of aspects of communication manager 520 as described herein. In some examples, the communication manager 620 or various components thereof may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise in conjunction with the receiver 610, the transmitter 615, or both. For example, the communication manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated with the receiver 610, the transmitter 615, or both to receive information, transmit information, or perform various other operations described herein.

According to examples disclosed herein, the communication manager 620 may support wireless communication at the UE. The search space set configuration interface 625 may be configured or otherwise support means for receiving an indication that the first and second common search space sets are linked for repetition of a downlink control channel comprising downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. The search space set monitoring component 630 can be configured or otherwise support means for monitoring the first and second common search space sets for downlink control information based on the indication. The decoding component 635 may be configured or otherwise support means for decoding downlink control information using at least one of a first physical downlink control channel candidate of a first set of common search spaces or a second physical downlink control channel candidate of a second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

Additionally or alternatively, in accordance with examples disclosed herein, the communication manager 620 may support wireless communication at the UE. The search space set configuration interface 625 may be configured or otherwise support means for receiving an indication that a first set of common search spaces is configured for a downlink control channel that includes first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule related to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure. The search space set monitoring component 630 can be configured or otherwise support means for monitoring a first common set of search spaces for a downlink control channel based on the first common set of search spaces being configured according to an validation rule.

In some cases, search space set configuration interface 625, search space set monitoring component 630, and decoding component 635 may each be a processor (e.g., transceiver processor, or radio processor, or transmitter processor, or receiver processor) or at least a portion thereof. The processor can be coupled with and execute instructions stored in memory that enable the processor to perform or facilitate the features of the search space set configuration interface 625, the search space set monitoring component 630, and the decoding component 635 as discussed herein. The transceiver processor may be co-located and/or in communication with (e.g., direct the operation of) the transceiver of the device. The radio processor may be co-located and/or in communication with (e.g., direct the operation of) a radio of the device (e.g., NR radio, LTE radio, wi-Fi radio). The transmitter processor may be co-located and/or in communication with (e.g., direct the operation of) a transmitter of the device. The receiver processor may be co-located and/or in communication with (e.g., direct the operation of) a receiver of the device.

Fig. 7 illustrates a block diagram 700 of a communication manager 720 supporting downlink channel repetition for a common set of search spaces, in accordance with aspects of the disclosure. Communication manager 720 may be an example of aspects of communication manager 520, communication manager 620, or both described herein. The communication manager 720, or various components thereof, may be an example of an apparatus for performing aspects of downlink channel repetition for a common set of search spaces as described herein. For example, communication manager 720 may include a search space set configuration interface 725, a search space set monitoring component 730, a decoding component 735, a set monitoring indication interface 740, a candidate identification component 745, a capability interface 750, an aggregation level component 755, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

According to examples disclosed herein, communication manager 720 may support wireless communication at a UE. The search space set configuration interface 725 may be configured or otherwise support means for receiving an indication that the first and second common search space sets are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. The search space set monitoring component 730 may be configured or otherwise support means for monitoring the first and second common search space sets for downlink control information based on the indication. The decoding component 735 may be configured or otherwise support means for decoding downlink control information using at least one of a first physical downlink control channel candidate of a first set of common search spaces or a second physical downlink control channel candidate of a second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

In some examples, to support receiving an indication, search space set configuration interface 725 may be configured or otherwise support means for receiving a first control message including a configuration for repeatedly linking a first set of common search spaces with a second set of common search spaces. In some examples, to support receiving the indication, the set monitoring indication interface 740 may be configured or otherwise support means for receiving a second control message indicating that the first set of common search spaces is monitored for downlink control channels based on downlink control information associated with one of a random access procedure, a scheduling of system information, or a paging procedure.

In some examples, to support receiving the indication, the set monitoring indication interface 740 may be configured or otherwise support means for receiving a control message indicating that both the first and second sets of common search spaces are linked and monitoring both the first and second sets of common search spaces for downlink control channels based on downlink control information being associated with one of a random access procedure, a scheduling of system information, or a paging procedure.

In some examples, to support receiving the control message, the set monitoring indication interface 740 may be configured or otherwise support means for receiving a common physical downlink control channel configuration message indicating that both a first index associated with a first common set of search spaces and a second index associated with a second common set of search spaces correspond to the same common set of search spaces type.

In some examples, candidate identification component 745 may be configured or otherwise support means for determining a number of downlink control channel candidates for a first set of common search spaces and a second set of common search spaces for a control channel element aggregation level of a set of control channel element aggregation levels, wherein the UE monitors the first set of common search spaces and the second set of common search spaces based on the determined number of downlink control channel candidates.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, the aggregation level component 755 may be configured or otherwise support means for identifying a mapping between a control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level. In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, candidate identification component 745 may be configured or otherwise support means for assigning the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, the aggregation level component 755 may be configured or otherwise support means for identifying a mapping between a control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level. In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, candidate identification component 745 may be configured or otherwise support means for assigning half of the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, the aggregation level component 755 may be configured or otherwise support means for identifying a mapping between a control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level. In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, candidate identification component 745 may be configured or otherwise support means for assigning the number of downlink control channel candidates to a first set of common search spaces and a second set of common search spaces based on whether the first set of common search spaces and the second set of common search spaces are positioned within a same transmission time interval.

In some examples, the UE assigns half of the number of downlink control channel candidates to both the first and second sets of common search spaces when they are located within the same transmission time interval. In some examples, the UE assigns the number of downlink control channel candidates to both the first and second sets of common search spaces when the first and second sets of common search spaces are located within separate transmission time intervals.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, candidate identification component 745 may be configured or otherwise support means for identifying a mapping between a control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level based on the first or second set of common search spaces having an index of 0.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, candidate identification component 745 may be configured or otherwise support means for determining a number of downlink control channel candidates for a control channel element aggregation level based on a search space set configuration corresponding to both a first common search space set and a second common search space set.

In some examples, candidate identification component 745 may be configured or otherwise support means for determining a total number of downlink control channel candidates by determining the number for each control channel element aggregation level in the set of control channel element aggregation levels.

In some examples, search space set configuration interface 725 may be configured or otherwise support means for receiving an indication that the first common search space set has index 0. In some examples, search space set configuration interface 725 may be configured or otherwise support means for receiving an indication of a first configuration for a first common set of search spaces according to the first common set of search spaces having an index of 0. In some examples, search space set configuration interface 725 may be configured or otherwise support means for receiving an indication of a second configuration for a second set of common search spaces corresponding to the first configuration.

In some examples, search space set configuration interface 725 may be configured or otherwise support means for receiving an indication that a first common set of search spaces has an index of 0, where the first common set of search spaces is associated with one or more first monitoring opportunities. In some examples, the search space set monitoring component 730 may be configured or otherwise support means for monitoring one or more second monitoring occasions of the second common search space set, the one or more second monitoring occasions mapped to one or more first monitoring occasions of the first common search space set according to the first common search space set having an index of 0.

In some examples, the search space set monitoring component 730 may be configured or otherwise support means for refraining from monitoring a second common set of search spaces for a second monitoring occasion that is not mapped to any of the one or more first monitoring occasions of the first common set of search spaces.

In some examples, the search space set monitoring component 730 may be configured or otherwise support means for determining that one or more second monitoring occasions of the second common search space set map to one or more first monitoring occasions of the first common search space set based on the first common search space set and the second common search space set being positioned within a same time slot or within consecutive time slots, a first number of one or more first monitoring occasions relative to a second number of monitoring occasions of the second common search space set, or a combination thereof.

In some examples, the capability interface 750 may be configured or otherwise support means for transmitting an indication that the UE supports repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, paging procedure, or a combination thereof.

In some examples, to support transmitting the indication, the capability interface 750 may be configured to or otherwise support means for: transmitting an indication of supporting each radio network temporary identifier type, transmitting an indication of supporting a link of a search space set with search space set 0, transmitting an indication of supporting an inter-slot link, transmitting an indication of supporting an intra-slot link, transmitting an indication of supporting a UE-specific search space set link, transmitting an indication of supporting a type 3 search space set link, or a combination thereof.

In some examples, to support transmitting the indication, capability interface 750 may be configured or otherwise support means for transmitting separate indications specifying each of support type 0, type 0A, type 1, and type 2 downlink control channel common search space set links.

In some examples, capability interface 750 may be configured or otherwise support means for receiving a first control message based on the transmission indication, the first control message including a configuration for repeatedly linking the first set of common search spaces with the second set of common search spaces.

In some examples, both the first set of common search spaces and the second set of common search spaces are a type 0 common search space set associated with a system information radio network temporary identifier, a type 0A common search space set associated with a system information radio network temporary identifier, a type 1 common search space set associated with a random access radio network temporary identifier, an MsgB radio network temporary identifier, or a temporary cell radio network temporary identifier, or a type 2 common search space set associated with a paging radio network temporary identifier.

Additionally or alternatively, according to examples disclosed herein, the communication manager 720 may support wireless communication at the UE. In some examples, the search space set configuration interface 725 may be configured or otherwise support means for receiving an indication that a first set of common search spaces is configured for a downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule related to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure. In some examples, the search space set monitoring component 730 may be configured or otherwise support means for monitoring a first common set of search spaces for downlink control channels based on the first common set of search spaces being configured according to an confirmatory rule.

In some examples, the validation rule is that the UE does not expect a set of type 0, type 0a, type 1, or type 2 common search spaces to be linked to another set of search spaces.

In some examples, the validation rule is that the UE does not expect the common set of search spaces with index 0 to be linked to another common set of search spaces.

In some cases, the search space set configuration interface 725, the search space set monitoring component 730, the decoding component 735, the set monitoring indication interface 740, the candidate identification component 745, the capability interface 750, and the aggregation level component 755 may each be a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) or at least a portion thereof. The processor can be coupled with and execute instructions stored in memory that enable the processor to execute or facilitate features of the search space set configuration interface 725, the search space set monitoring component 730, the decoding component 735, the set monitoring indication interface 740, the candidate identification component 745, the capability interface 750, and the aggregation level component 755 as discussed herein.

Fig. 8 illustrates a diagram of a system 800 including a device 805 that supports downlink channel repetition for a common set of search spaces, in accordance with aspects of the disclosure. Device 805 may be an example of device 505, device 605, or UE 115 as described herein, or a component comprising device 505, device 605, or UE 115. The device 805 may communicate wirelessly with one or more base stations 105, UEs 115, or any combination thereof. Device 805 may include components for two-way voice and data communications including components for transmitting and receiving communications, such as a communications manager 820, an input/output (I/O) controller 810, a transceiver 815, an antenna 825, a memory 830, code 835, and a processor 840. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 845).

The I/O controller 810 may manage input and output signals for the device 805. The I/O controller 810 may also manage peripheral devices that are not integrated into the device 805. In some cases, I/O controller 810 may represent a physical connection or port to an external peripheral device. In some cases, I/O controller 810 may utilize an operating system, such as Or another known operating system. Additionally or alternatively, the I/O controller 810 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I/O controller 810 may be implemented as part of a processor (such as processor 840). In some cases, a user may interact with device 805 via I/O controller 810 or via hardware components controlled by I/O controller 810.

In some cases, device 805 may include a single antenna 825. However, in some other cases, the device 805 may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 815 may communicate bi-directionally via one or more antennas 825, wired or wireless links, as described herein. For example, transceiver 815 may represent a wireless transceiver and may be in two-way communication with another wireless transceiver. The transceiver 815 may also include a modem to modulate packets and provide the modulated packets to one or more antennas 825 for transmission, as well as demodulate packets received from the one or more antennas 825. The transceiver 815 or transceiver 815 and one or more antennas 825 may be examples of a transmitter 515, a transmitter 615, a receiver 510, a receiver 610, or any combination or component thereof, as described herein.

Memory 830 may include Random Access Memory (RAM) and Read Only Memory (ROM). Memory 830 may store computer-readable, computer-executable code 835 comprising instructions that, when executed by processor 840, cause device 805 to perform the various functions described herein. Code 835 may be stored in a non-transitory computer-readable medium such as system memory or other types of memory. In some cases, code 835 may not be directly executable by processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, memory 830 may include, among other things, a basic I/O system (BIOS) that may control basic hardware or software operations, such as interactions with peripheral components or devices.

Processor 840 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 combinations thereof). In some cases, processor 840 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 840. Processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause device 805 to perform various functions (e.g., functions or tasks that support downlink channel repetition for a common set of search spaces). For example, the device 805 or components of the device 805 may include a processor 840 and a memory 830 coupled to the processor 840, the processor 840 and the memory 830 configured to perform the various functions described herein.

According to examples disclosed herein, communication manager 820 may support wireless communication at a UE. For example, communication manager 820 may be configured or otherwise support means for receiving an indication that a first set of common search spaces and a second set of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. Communication manager 820 may be configured or otherwise support means for monitoring the first and second sets of common search spaces for downlink control information based on the indication. Communication manager 820 may be configured or otherwise support means for decoding downlink control information using at least one of a first physical downlink control channel candidate of a first set of common search spaces or a second physical downlink control channel candidate of a second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

Additionally or alternatively, communication manager 820 may support wireless communication at a UE in accordance with examples disclosed herein. For example, communication manager 820 may be configured or otherwise support means for receiving an indication that a first set of common search spaces is configured for a downlink control channel that includes first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule related to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure. Communication manager 820 may be configured or otherwise support means for monitoring a first set of common search spaces for downlink control channels based on the first set of common search spaces being configured according to an validation rule.

By including or configuring the communication manager 820 according to examples as described herein, the device 805 can support techniques for improved communication reliability by configuring a UE for control channel repetition monitoring, thereby increasing the probability that the UE receives and decodes control information to support wireless communication. In addition, since the UE may apply rules to determine whether the set of search spaces are linked for repetition, the UE may be able to efficiently identify the location of the control information and decode the control information to support subsequent wireless communications.

In some examples, communication manager 820 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise in conjunction with transceiver 815, one or more antennas 825, or any combination thereof. Although communication manager 820 is illustrated as a separate component, in some examples, one or more of the functions described with reference to communication manager 820 may be supported or performed by processor 840, memory 830, code 835, or any combination thereof. For example, code 835 may include instructions executable by processor 840 to cause device 805 to perform aspects of downlink channel repetition for a shared set of search spaces as described herein, or processor 840 and memory 830 may be otherwise configured to perform or support such operations.

Fig. 9 illustrates a block diagram 900 of an apparatus 905 supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure. The device 905 may be an example of aspects of the base station 105 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communication manager 920. The apparatus 905 may also include one or more processors, memory coupled with the one or more processors, and instructions stored in the memory, executable by the one or more processors, to enable the one or more processors to perform the downlink channel repetition feature discussed herein. Each of these components may be in communication with each other (e.g., via one or more buses).

The receiver 910 may provide means for receiving information, such as packets associated with various information channels (e.g., control channels, data channels, information channels related to downlink channel repetition for a common set of search spaces), user data, control information, or any combination thereof. Information may be passed on to other components of the device 905. The receiver 910 may utilize a single antenna or a set comprising multiple antennas.

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

The communication manager 920, receiver 910, transmitter 915, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of downlink channel repetition for a common set of search spaces as described herein. For example, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may support methods for performing one or more of the functions described herein.

In some examples, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in hardware (e.g., in communication management circuitry). The hardware may include processors, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured or otherwise supporting means for performing the functions described in this disclosure. In some examples, a processor and a memory coupled to the processor may be configured to perform one or more functions described herein (e.g., by the processor executing instructions stored in the memory).

Additionally or alternatively, in some examples, the communication manager 920, receiver 910, transmitter 915, or various combinations or components thereof may be implemented by code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functions of the communication manager 920, receiver 910, transmitter 915, or various combinations or components thereof, may be performed by a general purpose processor, DSP, CPU, ASIC, FPGA, or any combination of these or other programmable logic devices (e.g., configured or otherwise supporting means for performing the functions described herein).

In some examples, the communication manager 920 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise in conjunction with the receiver 910, the transmitter 915, or both. For example, the communication manager 920 may receive information from the receiver 910, send information to the transmitter 915, or be integrated with the receiver 910, the transmitter 915, or both to receive information, transmit information, or perform various other operations described herein.

The communication manager 920 may support wireless communication at a base station according to examples as disclosed herein. For example, the communication manager 920 may be configured or otherwise support means for transmitting an indication to the UE that the first and second sets of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. The communication manager 920 may be configured or otherwise support means for encoding downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based on the indication. The communication manager 920 may be configured or otherwise support means for transmitting encoded downlink control information to a UE in a first set of common search spaces including a first downlink control channel candidate and in a second set of common search spaces including a second downlink control channel candidate.

Additionally or alternatively, the communication manager 920 may support wireless communication at a base station according to examples disclosed herein. For example, the communication manager 920 may be configured or otherwise support means for transmitting to a UE an indication that a first set of common search spaces is configured for a downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule related to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure. The communication manager 920 may be configured or otherwise support means for encoding the first downlink control information in the first set of common search spaces based on the first set of common search spaces being configured according to an validation rule. The communication manager 920 may be configured or otherwise support means for transmitting the encoded first downlink control information.

By including or configuring a communication manager 920 according to examples as described herein, the device 905 (e.g., a processor controlling or otherwise coupled to the receiver 910, the transmitter 915, the communication manager 920, or a combination thereof) may support techniques for more efficiently utilizing communication resources by configuring a UE to support control repetition, which may result in reduced processing overhead by increasing the probability of the UE receiving control information for communication. In addition, since the UE may apply rules to determine whether the set of search spaces are linked for repetition, the UE may be able to efficiently identify the location of the control information and decode the control information to support subsequent wireless communications, thereby improving communication efficiency in the wireless communication system.

Fig. 10 illustrates a block diagram 1000 of an apparatus 1005 supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure. The device 1005 may be an example of aspects of the device 905 or base station 105 as described herein. The device 1005 may include a receiver 1010, a transmitter 1015, and a communication manager 1020. The device 1005 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

The receiver 1010 may provide means for receiving information, such as packets associated with various information channels (e.g., control channels, data channels, information channels related to downlink channel repetition for a common set of search spaces), user data, control information, or any combination thereof. Information may be passed on to other components of the device 1005. The receiver 1010 may utilize a single antenna or a set comprising multiple antennas.

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

The apparatus 1005 or various components thereof may be an example of means for performing aspects of downlink channel repetition for a common set of search spaces as described herein. For example, communication manager 1020 may include search space set configuration interface 1025, coding component 1030, DCI interface 1035, or any combination thereof. Communication manager 1020 may be an example of aspects of communication manager 920 as described herein. In some examples, communication manager 1020 or various components thereof may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise in conjunction with receiver 1010, transmitter 1015, or both. For example, communication manager 1020 may receive information from receiver 1010, send information to transmitter 1015, or be integrated with receiver 1010, transmitter 1015, or both to receive information, transmit information, or perform various other operations described herein.

The communication manager 1020 may support wireless communication at a base station according to examples as disclosed herein. The search space set configuration interface 1025 may be configured or otherwise support means for transmitting an indication to the UE that the first and second sets of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. The encoding component 1030 may be configured or otherwise support means for encoding downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based on the indication. The DCI interface 1035 may be configured or otherwise support means for transmitting encoded downlink control information to a UE in a first set of common search spaces including a first downlink control channel candidate and in a second set of common search spaces including a second downlink control channel candidate.

Additionally or alternatively, the communication manager 1020 may support wireless communication at a base station according to examples disclosed herein. The search space set configuration interface 1025 may be configured or otherwise support means for transmitting to a UE an indication that a first set of common search spaces is configured for a downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule related to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure. The encoding component 1030 may be configured or otherwise support means for encoding first downlink control information in a first set of common search spaces based on the first set of common search spaces being configured according to an validation rule. The DCI interface 1035 may be configured or otherwise support means for transmitting the encoded first downlink control information.

In some cases, search space set configuration interface 1025, encoding component 1030, and DCI interface 1035 may each be, or at least be part of, a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor). The processor may be coupled with a memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features of search space set configuration interface 1025, coding component 1030, and DCI interface 1035 as discussed herein. The transceiver processor may be co-located and/or in communication with (e.g., direct the operation of) the transceiver of the device. The radio processor may be co-located and/or in communication with (e.g., direct the operation of) a radio of the device (e.g., NR radio, LTE radio, wi-Fi radio). The transmitter processor may be co-located and/or in communication with (e.g., direct the operation of) a transmitter of the device. The receiver processor may be co-located and/or in communication with (e.g., direct the operation of) a receiver of the device.

Fig. 11 illustrates a block diagram 1100 of a communication manager 1120 supporting downlink channel repetition for a common set of search spaces, in accordance with aspects of the disclosure. Communication manager 1120 may be an example of aspects of communication manager 920, communication manager 1020, or both described herein. The communication manager 1120, or various components thereof, may be an example of means for performing aspects of downlink channel repetition for a common set of search spaces as described herein. For example, the communication manager 1120 can include a search space set configuration interface 1125, an encoding component 1130, a DCI interface 1135, a search space set monitoring indication interface 1140, a control channel candidate identification component 1145, a capability interface 1150, an aggregation level component 1155, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

The communication manager 1120 may support wireless communication at a base station according to examples as disclosed herein. The search space set configuration interface 1125 may be configured or otherwise support means for transmitting an indication to the UE that the first and second sets of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. The encoding component 1130 may be configured or otherwise support means for encoding downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based on the indication. The DCI interface 1135 may be configured or otherwise support means for transmitting encoded downlink control information to a UE in a first set of common search spaces including a first downlink control channel candidate and in a second set of common search spaces including a second downlink control channel candidate.

In some examples, to support transmitting the indication, the search space set configuration interface 1125 may be configured or otherwise support means for transmitting a first control message including a configuration for repeatedly linking a first set of common search spaces with a second set of common search spaces. In some examples, to support transmitting the indication, the search space set monitoring indication interface 1140 may be configured or otherwise support means for transmitting a second control message indicating that the first set of common search spaces is monitored for a downlink control channel based on downlink control information associated with one of a random access procedure, a scheduling of system information, or a paging procedure.

In some examples, to support transmitting the indication, the search space set monitoring indication interface 1140 may be configured or otherwise support means for transmitting a control message indicating that both the first and second sets of common search spaces are linked and monitoring both the first and second sets of common search spaces for downlink control channels based on downlink control information being associated with one of a random access procedure, a scheduling of system information, or a paging procedure.

In some examples, to support transmission of control messages, the search space set monitoring indication interface 1140 may be configured or otherwise support means for transmitting a common physical downlink control channel configuration message indicating that both a first index associated with a first common search space set and a second index associated with a second common search space set correspond to the same common search space set type.

In some examples, the control channel candidate identification component 1145 may be configured or otherwise support means for determining a number of downlink control channel candidates for a first set of common search spaces and a second set of common search spaces for a control channel element aggregation level of a set of control channel element aggregation levels, wherein the UE monitors the first set of common search spaces and the second set of common search spaces based on the determined number of downlink control channel candidates.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, aggregation level component 1155 may be configured or otherwise support means for identifying a mapping between a control channel element aggregation level and a number of downlink control channel candidates for the control channel element aggregation level. In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, the control channel candidate identification component 1145 may be configured or otherwise support means for assigning the number of downlink control channel candidates to both the first and second sets of common search spaces.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, aggregation level component 1155 may be configured or otherwise support means for identifying a mapping between a control channel element aggregation level and a number of downlink control channel candidates for the control channel element aggregation level. In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, the control channel candidate identification component 1145 may be configured or otherwise support means for assigning half of the number of downlink control channel candidates to both the first and second sets of common search spaces.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, aggregation level component 1155 may be configured or otherwise support means for identifying a mapping between a control channel element aggregation level and a number of downlink control channel candidates for the control channel element aggregation level. In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, the control channel candidate identification component 1145 may be configured or otherwise support means for assigning the number of downlink control channel candidates to a first set of common search spaces and a second set of common search spaces based on whether the first set of common search spaces and the second set of common search spaces are positioned within a same transmission time interval.

In some examples, when the first and second sets of common search spaces are located within the same transmission time interval, the base station assigns half of the number of downlink control channel candidates to both the first and second sets of common search spaces. In some examples, the base station assigns the number of downlink control channel candidates to both the first and second sets of common search spaces when the first and second sets of common search spaces are located within separate transmission time intervals.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, aggregation level component 1155 may be configured or otherwise support means for identifying a mapping between a control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level based on the first or second set of common search spaces having an index of 0.

In some examples, to support determining a number of downlink control channel candidates for a control channel element aggregation level, the control channel candidate identification component 1145 may be configured or otherwise support means for determining a number of downlink control channel candidates for a control channel element aggregation level based on a search space set configuration corresponding to both the first and second common search space sets.

In some examples, the control channel candidate identification component 1145 may be configured or otherwise support means for determining the total number of downlink control channel candidates by determining the number for each control channel element aggregation level in the set of control channel element aggregation levels.

In some examples, search space set configuration interface 1125 may be configured or otherwise support means for transmitting an indication that the first common search space set has index 0. In some examples, search space set configuration interface 1125 may be configured or otherwise support means for transmitting an indication of a first configuration for a first common set of search spaces according to the first common set of search spaces having an index of 0. In some examples, search space set configuration interface 1125 may be configured or otherwise support means for transmitting an indication of a second configuration for a second set of shared search spaces corresponding to the first configuration.

In some examples, the search space set configuration interface 1125 may be configured or otherwise support means for transmitting an indication that the first common search space set has an index of 0, wherein the first common search space set is associated with one or more first monitoring occasions, and wherein the second downlink control channel candidate is located within a second monitoring occasion of the second common search space set, and the second monitoring occasion is mapped to a first monitoring occasion of the one or more first monitoring occasions.

In some examples, the encoding component 1130 may be configured or otherwise support means for suppressing encoding of downlink control information in a third downlink control channel candidate that is not mapped to a third monitoring occasion of one of the first monitoring occasions.

In some examples, encoding component 1130 may be configured or otherwise support means for determining that one or more second monitoring occasions of the second set of common search spaces map to one or more first monitoring occasions of the first set of common search spaces based on the first set of common search spaces and the second set of common search spaces being positioned within a same time slot or within consecutive time slots, a first number of one or more first monitoring occasions relative to a second number of monitoring occasions of the second set of common search spaces, or a combination thereof.

In some examples, the capability interface 1150 may be configured or otherwise support means for receiving from a UE an indication that the UE supports repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, paging procedure, or a combination thereof.

In some examples, to support receiving the indication, the capability interface 1150 may be configured or otherwise support means for: receiving an indication of supporting each radio network temporary identifier type, receiving an indication of supporting a link of a search space set with search space set 0, receiving an indication of supporting an inter-slot link, receiving an indication of supporting an intra-slot link, receiving an indication of supporting a UE-specific search space set link, receiving an indication of supporting a type 3 search space set link, or a combination thereof.

In some examples, to support receiving the indication, the capability interface 1150 may be configured or otherwise support means for receiving an indication specifying each of the support type 0, type 0A, type 1, and type 2 downlink control channel common search space set links.

In some examples, to support receiving the indication, the capability interface 1150 may be configured or otherwise support means for transmitting a first control message based on the received indication, the first control message including a configuration for repeatedly linking a first set of common search spaces with a second set of common search spaces.

Additionally or alternatively, the communication manager 1120 may support wireless communication at a base station according to examples disclosed herein. In some examples, the search space set configuration interface 1125 may be configured to or otherwise support means for transmitting to a UE an indication that a first common search space set is configured for a downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first common search space set being a unique common search space set configured for the downlink control channel according to an acknowledgement rule related to the linked common search space set and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure. In some examples, encoding component 1130 may be configured or otherwise support means for encoding the first downlink control information in the first set of common search spaces based on the first set of common search spaces being configured according to an validation rule. In some examples, DCI interface 1135 may be configured to or otherwise support means for transmitting the encoded first downlink control information.

In some examples, the validation rule is that the set of type 0, type 0a, type 1, or type 2 common search spaces are not linked to another set of search spaces.

In some examples, the validation rule is that a common set of search spaces with index 0 is not linked to another common set of search spaces.

In some cases, search space set configuration interface 1125, coding component 1130, DCI interface 1135, search space set monitoring indication interface 1140, control channel candidate identification component 1145, capability interface 1150, and aggregation level component 1155 may each be a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) or at least a portion thereof. The processor can be coupled with and execute instructions stored in memory that enable the processor to perform or facilitate the features of search space set configuration interface 1125, coding component 1130, DCI interface 1135, search space set monitoring indication interface 1140, control channel candidate identification component 1145, capability interface 1150, and aggregation level component 1155 as discussed herein.

Fig. 12 illustrates a diagram of a system 1200 including an apparatus 1205 supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the disclosure. The device 1205 may be or include examples of the device 905, the device 1005, or the base station 105 as described herein. The device 1205 may communicate wirelessly with one or more base stations 105, UEs 115, or any combination thereof. Device 1205 may include components for two-way voice and data communications including components for transmitting and receiving communications, such as a communications manager 1220, a network communications manager 1210, a transceiver 1215, an antenna 1225, memory 1230, code 1235, a processor 1240, and an inter-station communications manager 1245. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1250).

The network communication manager 1210 may manage communication with the core network 130 (e.g., via one or more wired backhaul links). For example, the network communication manager 1210 may manage delivery of data communications for client devices, such as one or more UEs 115.

In some cases, device 1205 may include a single antenna 1225. However, in some other cases, the device 1205 may have more than one antenna 1225 that may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 1215 may communicate bi-directionally via one or more antennas 1225, wired or wireless links, as described herein. For example, transceiver 1215 may represent a wireless transceiver and may be in two-way communication with another wireless transceiver. The transceiver 1215 may also include a modem to modulate packets and provide the modulated packets to the one or more antennas 1225 for transmission, as well as demodulate packets received from the one or more antennas 1225. The transceiver 1215 or transceiver 1215 and the one or more antennas 1225 may be examples of a transmitter 915, a transmitter 1015, a receiver 910, a receiver 1010, or any combination thereof, or components thereof, as described herein.

The memory 1230 may include RAM and ROM. Memory 1230 may store computer-readable, computer-executable code 1235 comprising instructions that, when executed by processor 1240, cause device 1205 to perform the various functions described herein. Code 1235 may be stored in a non-transitory computer readable medium, such as system memory or other types of memory. In some cases, code 1235 may not be executed directly by processor 1240, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, memory 1230 may include, among other things, a BIOS that may control basic hardware or software operations, such as interactions with peripheral components or devices.

Processor 1240 may include intelligent hardware devices (e.g., general purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combinations thereof). In some cases, processor 1240 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 1240. Processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1230) to cause device 1205 to perform various functions (e.g., functions or tasks that support downlink channel repetition for a common set of search spaces). For example, the device 1205 or components of the device 1205 may include a processor 1240 and a memory 1230 coupled to the processor 1240, the processor 1240 and memory 1230 configured to perform the various functions described herein.

The inter-station communication manager 1245 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, inter-station communication manager 1245 may coordinate scheduling of transmissions to UEs 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-station communication manager 1245 may provide an X2 interface within the LTE/LTE-a wireless communication network technology to provide communication between the base stations 105.

The communication manager 1220 may support wireless communication at a base station according to examples as disclosed herein. For example, the communication manager 1220 may be configured or otherwise support means for transmitting an indication to the UE that the first set of common search spaces and the second set of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. The communication manager 1220 may be configured or otherwise support means for encoding downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based on the indication. The communication manager 1220 may be configured or otherwise support means for transmitting encoded downlink control information to a UE in a first set of common search spaces including a first downlink control channel candidate and in a second set of common search spaces including a second downlink control channel candidate.

Additionally or alternatively, the communication manager 1220 may support wireless communication at a base station according to examples disclosed herein. For example, the communication manager 1220 may be configured or otherwise support means for transmitting to a UE an indication that a first set of common search spaces is configured for a downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule related to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure. The communication manager 1220 may be configured or otherwise support means for encoding first downlink control information in the first set of common search spaces based on the first set of common search spaces being configured according to an validation rule. The communication manager 1220 may be configured or otherwise support means for transmitting the encoded first downlink control information.

By including or configuring the communication manager 1220 in accordance with examples as described herein, the device 1205 may support techniques for improved communication reliability by configuring a UE for control channel repetition monitoring, thereby increasing the probability that the UE receives and decodes control information to support wireless communication.

In some examples, the communication manager 1220 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise in conjunction with the transceiver 1215, the one or more antennas 1225, or any combination thereof. Although communication manager 1220 is illustrated as a separate component, in some examples, one or more of the functions described with reference to communication manager 1220 may be supported or performed by processor 1240, memory 1230, code 1235, or any combination thereof. For example, code 1235 may include instructions executable by processor 1240 to cause apparatus 1205 to perform aspects of downlink channel repetition for a common set of search spaces as described herein, or processor 1240 and memory 1230 may be otherwise configured to perform or support such operations.

Fig. 13 illustrates a flow chart that demonstrates a method 1300 of supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the present disclosure. The operations of method 1300 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1300 may be performed by UE 115 as described with reference to fig. 1-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functionality.

At 1305, the method may include receiving an indication that a first set of common search spaces and a second set of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. 1305 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1305 may be performed by search space set configuration interface 725 as described with reference to fig. 7.

At 1310, the method may include monitoring a first set of common search spaces and a second set of common search spaces for downlink control information based on the indication. Operations of 1310 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1310 may be performed by search space set monitoring component 730 as described with reference to fig. 7.

At 1315, the method may include decoding downlink control information using at least one of a first physical downlink control channel candidate of a first set of common search spaces or a second physical downlink control channel candidate of a second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate. The operations of 1315 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1315 may be performed by decoding component 735 as described with reference to fig. 7.

Fig. 14 illustrates a flow chart that demonstrates a method 1400 of supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the present disclosure. The operations of method 1400 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1400 may be performed by UE 115 as described with reference to fig. 1-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functionality.

At 1405, the method can include receiving an indication that the first set of common search spaces and the second set of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or a paging procedure. 1405 may be performed according to examples disclosed herein. In some examples, aspects of the operation of 1405 may be performed by search space set configuration interface 725 as described with reference to fig. 7.

At 1410, the method may include receiving a first control message including a configuration to repeatedly link a first set of common search spaces with a second set of common search spaces. 1410 may be performed according to examples disclosed herein. In some examples, aspects of the operation of 1410 may be performed by search space set configuration interface 725 as described with reference to fig. 7.

At 1415, the method may include receiving a second control message indicating that the first set of common search spaces is monitored for a downlink control channel based on the downlink control information being associated with one of a random access procedure, a scheduling of system information, or a paging procedure. 1415 may be performed according to examples disclosed herein. In some examples, aspects of the operation of 1415 may be performed by the set monitoring indication interface 740 as described with reference to fig. 7.

At 1420, the method may include monitoring the first set of common search spaces and the second set of common search spaces for downlink control information based on the indication. Operations of 1420 may be performed according to examples disclosed herein. In some examples, aspects of the operation of 1420 may be performed by search space set monitoring component 730 as described with reference to fig. 7.

At 1425, the method may include decoding downlink control information using at least one of a first physical downlink control channel candidate of a first set of common search spaces or a second physical downlink control channel candidate of a second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate. The operations of 1425 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1425 may be performed by decoding component 735 as described with reference to fig. 7.

Fig. 15 illustrates a flow chart that demonstrates a method 1500 of supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the present disclosure. The operations of the method 1500 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1500 may be performed by UE 115 as described with reference to fig. 1-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functionality.

At 1505, the method may include receiving an indication that the first set of common search spaces and the second set of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. The operations of 1505 may be performed according to examples disclosed herein. In some examples, aspects of the operation of 1505 may be performed by search space set configuration interface 725 as described with reference to fig. 7.

At 1510, the method may include receiving a control message indicating that both the first set of common search spaces and the second set of common search spaces are linked and monitoring both the first set of common search spaces and the second set of common search spaces for a downlink control channel based on downlink control information associated with one of a random access procedure, a scheduling of system information, or a paging procedure. 1510 may be performed according to examples disclosed herein. In some examples, aspects of the operation of 1510 may be performed by the set monitoring indication interface 740 as described with reference to fig. 7.

At 1515, the method may include monitoring the first set of common search spaces and the second set of common search spaces for downlink control information based on the indication. Operations of 1515 may be performed according to examples disclosed herein. In some examples, aspects of the operations of 1515 may be performed by the search space set monitoring component 730 as described with reference to fig. 7.

At 1520, the method may include decoding downlink control information using at least one of a first physical downlink control channel candidate of a first set of common search spaces or a second physical downlink control channel candidate of a second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate. Operations of 1520 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1520 may be performed by decoding component 735 as described with reference to fig. 7.

Fig. 16 illustrates a flow chart that demonstrates a method 1600 of supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the present disclosure. The operations of method 1600 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1600 may be performed by UE 115 as described with reference to fig. 1-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functionality.

At 1605, the method may include receiving an indication that a first set of common search spaces is configured for a downlink control channel that includes first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule related to the linked set of common search spaces and downlink control information messages associated with the random access procedure, the scheduling of system information, or the paging procedure. The operations of 1605 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1605 may be performed by search space set configuration interface 725 as described with reference to fig. 7.

At 1610, the method may include monitoring the first set of common search spaces for a downlink control channel based on the first set of common search spaces being configured according to an confirmatory rule. The operations of 1610 may be performed according to examples disclosed herein. In some examples, aspects of the operation of 1610 may be performed by search space set monitoring component 730 as described with reference to fig. 7.

Fig. 17 illustrates a flow chart that demonstrates a method 1700 of supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the present disclosure. The operations of method 1700 may be implemented by a base station or components thereof as described herein. For example, the operations of the method 1700 may be performed by the base station 105 as described with reference to fig. 1-4 and 9-12. In some examples, a base station may execute a set of instructions to control a functional element of the base station to perform the described functions. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the described functions.

At 1705, the method may include transmitting an indication to the UE that the first set of common search spaces and the second set of common search spaces are linked for repetition of a downlink control channel that includes downlink control information associated with a random access procedure, scheduling of system information, or paging procedure. 1705 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1705 may be performed by search space set configuration interface 1125 as described with reference to fig. 11.

At 1710, the method may include encoding downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based on the indication. Operations of 1710 may be performed according to examples disclosed herein. In some examples, aspects of the operation of 1710 may be performed by the encoding component 1130 as described with reference to fig. 11.

At 1715, the method may include transmitting the encoded downlink control information to the UE in a first set of common search spaces including the first downlink control channel candidate and in a second set of common search spaces including the second downlink control channel candidate. 1715 may be performed according to examples disclosed herein. In some examples, aspects of the operation of 1715 may be performed by DCI interface 1135 as described with reference to fig. 11.

Fig. 18 illustrates a flow chart that demonstrates a method 1800 of supporting downlink channel repetition for a common set of search spaces in accordance with aspects of the present disclosure. The operations of method 1800 may be implemented by a base station or components thereof as described herein. For example, the operations of method 1800 may be performed by base station 105 as described with reference to fig. 1-4 and 9-12. In some examples, a base station may execute a set of instructions to control a functional element of the base station to perform the described functions. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the described functions.

At 1805, the method may include transmitting, to the UE, an indication that a first set of common search spaces is configured for a downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule related to the linked set of common search spaces and downlink control information messages associated with the random access procedure, the scheduling of system information, or the paging procedure. The operations of 1805 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1805 may be performed by search space set configuration interface 1125 as described with reference to fig. 11.

At 1810, the method may include encoding first downlink control information in the first set of common search spaces based on the first set of common search spaces being configured according to an acknowledgement rule. 1810 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1810 may be performed by the encoding component 1130 as described with reference to fig. 11.

At 1815, the method may include transmitting the encoded first downlink control information. The operations of 1815 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1815 may be performed by DCI interface 1135 as described with reference to fig. 11.

The following provides an overview of aspects of the disclosure:

aspect 1: a method for wireless communication at a UE, comprising: receiving an indication that the first set of common search spaces and the second set of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or a paging procedure; monitoring the first set of common search spaces and the second set of common search spaces for the downlink control information based at least in part on the indication; and decoding the downlink control information using at least one of a first physical downlink control channel candidate of the first set of common search spaces or a second physical downlink control channel candidate of the second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

Aspect 2: the method of aspect 1, wherein receiving the indication comprises: receiving a first control message, the first control message including a configuration for repeatedly linking the first set of common search spaces with the second set of common search spaces; and receive a second control message indicating to monitor the first set of common search spaces for the downlink control channel based at least in part on the downlink control information being associated with one of the random access procedure, the scheduling of system information, or the paging procedure.

Aspect 3: the method of aspect 1, wherein receiving the indication comprises: a control message is received indicating that both the first set of common search spaces and the second set of common search spaces are linked and both the first set of common search spaces and the second set of common search spaces are monitored for the downlink control channel based at least in part on the downlink control information being associated with one of the random access procedure, the scheduling of the system information, or the paging procedure.

Aspect 4: the method of aspect 3, wherein receiving the control message comprises: a common physical downlink control channel configuration message is received indicating that both a first index associated with the first set of common search spaces and a second index associated with the second set of common search spaces correspond to the same common search space set type.

Aspect 5: the method of any one of aspects 1 to 4, further comprising: determining a number of downlink control channel candidates for the first and second sets of common search spaces for a control channel element aggregation level of a set of control channel element aggregation levels, wherein the UE monitors the first and second sets of common search spaces based at least in part on the determined number of downlink control channel candidates.

Aspect 6: the method of aspect 5, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: identifying a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level; and assigning the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces.

Aspect 7: the method of aspect 5, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: identifying a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level; and assigning half of the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces.

Aspect 8: the method of any of aspects 5 to 7, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: identifying a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level; and assigning the number of downlink control channel candidates to the first and second sets of common search spaces based at least in part on whether the first and second sets of common search spaces are positioned within a same transmission time interval.

Aspect 9: the method of aspect 8, wherein the UE assigns half of the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces when the first set of common search spaces and the second set of common search spaces are positioned within a same transmission time interval, or assigns the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces when the first set of common search spaces and the second set of common search spaces are positioned within separate transmission time intervals.

Aspect 10: the method of aspect 5, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level is identified based at least in part on the first set of common search spaces or the second set of common search spaces having an index of 0.

Aspect 11: the method of aspect 5, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: the number of downlink control channel candidates for the control channel element aggregation level is determined based at least in part on the search space set configuration corresponding to both the first common search space set and the second common search space set.

Aspect 12: the method of any one of aspects 5 to 11, further comprising: the total number of downlink control channel candidates is determined by determining the number for each control channel element aggregation level in the set of control channel element aggregation levels.

Aspect 13: the method of any one of aspects 1 to 12, further comprising: receiving an indication that the first set of common search spaces has an index of 0; receiving an indication of a first configuration for the first set of common search spaces in accordance with the first set of common search spaces having an index of 0; and receiving an indication of a second configuration for the second set of common search spaces corresponding to the first configuration.

Aspect 14: the method of any one of aspects 1 to 13, further comprising: receiving an indication that the first set of common search spaces has an index of 0, wherein the first set of common search spaces is associated with one or more first monitoring opportunities; and monitoring one or more second monitoring occasions of the second set of common search spaces, the one or more second monitoring occasions mapped to the one or more first monitoring occasions of the first set of common search spaces according to the first set of common search spaces having an index of 0.

Aspect 15: the method of aspect 14, further comprising: suppressing monitoring a second monitoring occasion of the second set of common search spaces that is not mapped to any of the one or more first monitoring occasions of the first set of common search spaces.

Aspect 16: the method of any of aspects 14 to 15, further comprising: the one or more second monitoring occasions of the second set of common search spaces are mapped to the one or more first monitoring occasions of the first set of common search spaces based on the first set of common search spaces and the second set of common search spaces being located within the same time slot or within consecutive time slots, a first number of the one or more first monitoring occasions relative to a second number of the monitoring occasions of the second set of common search spaces, or a combination thereof.

Aspect 17: the method of any one of aspects 1 to 16, further comprising: an indication is transmitted that the UE supports repetition of the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, paging procedure, or a combination thereof.

Aspect 18: the method of aspect 17, wherein transmitting the indication comprises: transmitting an indication of supporting each radio network temporary identifier type, transmitting an indication of supporting a link of a search space set with search space set 0, transmitting an indication of supporting an inter-slot link, transmitting an indication of supporting an intra-slot link, transmitting an indication of supporting a UE-specific search space set link, transmitting an indication of supporting a type 3 search space set link, or a combination thereof.

Aspect 19: the method of any of aspects 17 to 18, wherein transmitting the indication comprises: a separate indication specifying each of the support type 0, type 0A, type 1, and type 2 downlink control channel common search space set links is transmitted.

Aspect 20: the method of any of aspects 17-19, further comprising: a first control message is received based at least in part on transmitting the indication, the first control message including a configuration to repeatedly link the first set of common search spaces with the second set of common search spaces.

Aspect 21: the method of any one of aspects 1 to 20, wherein the first set of common search spaces and the second set of common search spaces are both a type 0 common search space set associated with a system information radio network temporary identifier, a type 0A common search space set associated with a system information radio network temporary identifier, a type 1 common search space set associated with a random access radio network temporary identifier, an MsgB radio network temporary identifier, or a temporary cell radio network temporary identifier, or a type 2 common search space set associated with a paging radio network temporary identifier.

Aspect 22: a method for wireless communication at a UE, comprising: receiving an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel comprising first downlink control information associated with a random access procedure, scheduling of system information, or paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and a downlink control information message associated with the random access procedure, scheduling of system information, or the paging procedure; and monitoring the first set of common search spaces for the downlink control channel based at least in part on the first set of common search spaces being configured according to the validation rule.

Aspect 23: the method of aspect 22, wherein the validation rule is that the UE does not expect a set of type 0, type 0a, type 1, or type 2 common search spaces to be linked to another set of search spaces.

Aspect 24: the method of any of aspects 22-23, wherein the validation rule is that the UE does not expect a common set of search spaces with index 0 to be linked to another common set of search spaces.

Aspect 25: a method for wireless communication at a base station, comprising: transmitting, to the UE, an indication that the first set of common search spaces and the second set of common search spaces are linked for repetition of a downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or paging procedure; encoding the downlink control information in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based at least in part on the indication; and transmitting encoded downlink control information to the UE in the first set of common search spaces including the first downlink control channel candidate and in the second set of common search spaces including the second downlink control channel candidate.

Aspect 26: the method of aspect 25, wherein transmitting the indication comprises: transmitting a first control message, the first control message including a configuration for repeatedly linking the first set of common search spaces with the second set of common search spaces; and transmitting a second control message indicating to monitor the first set of common search spaces for the downlink control channel based at least in part on the downlink control information being associated with one of the random access procedure, the scheduling of system information, or the paging procedure.

Aspect 27: the method of aspect 25, wherein transmitting the indication comprises: a control message is transmitted indicating that both the first set of common search spaces and the second set of common search spaces are linked and both the first set of common search spaces and the second set of common search spaces are monitored for the downlink control channel based at least in part on the downlink control information being associated with one of the random access procedure, the scheduling of the system information, or the paging procedure.

Aspect 28: the method of aspect 27, wherein transmitting the control message comprises: a common physical downlink control channel configuration message is transmitted indicating that both a first index associated with the first set of common search spaces and a second index associated with the second set of common search spaces correspond to the same common search space set type.

Aspect 29: the method of any of aspects 25-28, further comprising: determining a number of downlink control channel candidates for the first and second sets of common search spaces for a control channel element aggregation level of a set of control channel element aggregation levels, wherein the UE monitors the first and second sets of common search spaces based at least in part on the determined number of downlink control channel candidates.

Aspect 30: the method of claim 29, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: identifying a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level; and assigning the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces.

Aspect 31: the method of claim 29, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: identifying a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level; and assigning half of the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces.

Aspect 32: the method of any of claims 29 to 31, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: identifying a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level; and assigning the number of downlink control channel candidates to the first and second sets of common search spaces based at least in part on whether the first and second sets of common search spaces are positioned within a same transmission time interval.

Aspect 33: the method of claim 32, wherein the base station assigns half of the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces when the first set of common search spaces and the second set of common search spaces are positioned within a same transmission time interval, or assigns half of the number of downlink control channel candidates to both the first set of common search spaces and the second set of common search spaces when the first set of common search spaces and the second set of common search spaces are positioned within separate transmission time intervals.

Aspect 34: the method of any of claims 29 to 33, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: a mapping between the control channel element aggregation level and the number of downlink control channel candidates for the control channel element aggregation level is identified based at least in part on the first set of common search spaces or the second set of common search spaces having an index of 0.

Aspect 35: the method of claim 29, wherein determining the number of downlink control channel candidates for the control channel element aggregation level comprises: the number of downlink control channel candidates for the control channel element aggregation level is determined based at least in part on the search space set configuration corresponding to both the first common search space set and the second common search space set.

Aspect 36: the method of any of aspects 29 to 35, further comprising: the total number of downlink control channel candidates is determined by determining the number for each control channel element aggregation level in the set of control channel element aggregation levels.

Aspect 37: the method of any of aspects 25 to 36, further comprising: transmitting an indication that the first set of common search spaces has an index of 0; transmitting an indication of a first configuration for the first set of common search spaces in accordance with the first set of common search spaces having an index of 0; and transmitting an indication of a second configuration for the second set of common search spaces corresponding to the first configuration.

Aspect 38: the method of any of aspects 25 to 37, further comprising: transmitting an indication that the first set of common search spaces has an index of 0, wherein the first set of common search spaces is associated with one or more first monitoring occasions, and wherein the second downlink control channel candidate is located within a second monitoring occasion of the second set of common search spaces, and the second monitoring occasion is mapped to a first monitoring occasion of the one or more first monitoring occasions.

Aspect 39: the method of aspect 38, further comprising: the downlink control information is suppressed from being encoded in a third downlink control channel candidate that is not mapped to a third one of the first monitoring occasions.

Aspect 40: the method of any of aspects 38-39, further comprising: the one or more second monitoring occasions of the second set of common search spaces are mapped to the one or more first monitoring occasions of the first set of common search spaces based on the first set of common search spaces and the second set of common search spaces being located within the same time slot or within consecutive time slots, a first number of the one or more first monitoring occasions relative to a second number of the monitoring occasions of the second set of common search spaces, or a combination thereof.

Aspect 41: the method of any of aspects 25 to 40, further comprising: an indication is received from the UE that the UE supports repetition of the downlink control channel including the downlink control information associated with the random access procedure, scheduling of the system information, the paging procedure, or a combination thereof.

Aspect 42: the method of aspect 41, wherein receiving the indication comprises: receiving an indication of supporting each radio network temporary identifier type, receiving an indication of supporting a link of a search space set with search space set 0, receiving an indication of supporting an inter-slot link, receiving an indication of supporting an intra-slot link, receiving an indication of supporting a UE-specific search space set link, receiving an indication of supporting a type 3 search space set link, or a combination thereof.

Aspect 43: the method of any of aspects 41-42, wherein receiving the indication comprises: an indication specifying support for each of type 0, type 0A, type 1, and type 2 downlink control channel common search space set links is received.

Aspect 44: the method of any of aspects 41-43, wherein receiving the indication comprises: a first control message is transmitted based at least in part on the received indication, the first control message including a configuration to repeatedly link the first set of common search spaces with the second set of common search spaces.

Aspect 45: the method of any one of aspects 25 to 44, wherein the first set of common search spaces and the second set of common search spaces are both a type 0 common search space set associated with a system information radio network temporary identifier, a type 0A common search space set associated with a system information radio network temporary identifier, a type 1 common search space set associated with a random access radio network temporary identifier, an MsgB radio network temporary identifier, or a temporary cell radio network temporary identifier, or a type 2 common search space set associated with a paging radio network temporary identifier.

Aspect 46: a method for wireless communication at a base station, comprising: transmitting, to a UE, an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel including first downlink control information associated with a random access procedure, scheduling of system information, or paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and a downlink control information message associated with the random access procedure, scheduling of system information, or the paging procedure; encoding the first downlink control information in the first set of common search spaces based at least in part on the first set of common search spaces being configured according to the validation rule; and transmitting the encoded first downlink control information.

Aspect 47: the method of aspect 46, wherein the validation rule is that a set of type 0, type 0a, type 1, or type 2 common search spaces are not linked to another set of search spaces.

Aspect 48: the method of any of aspects 46-47, wherein the validation rule is that a common set of search spaces with index 0 is not linked to another common set of search spaces.

Aspect 49: an apparatus for wireless communication at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 1 to 21.

Aspect 50: an apparatus for wireless communication at a UE, comprising at least one means for performing the method of any one of aspects 1-21.

Aspect 51: a non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 1 to 21.

Aspect 52: an apparatus for wireless communication at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 22 to 24.

Aspect 53: an apparatus for wireless communication at a UE, comprising at least one means for performing the method of any of aspects 22-24.

Aspect 54: a non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method of any of aspects 22 to 24.

Aspect 55: an apparatus for wireless communication at a base station, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 25 to 45.

Aspect 56: an apparatus for wireless communication at a base station, comprising at least one means for performing the method of any one of aspects 25-45.

Aspect 57: a non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform the method of any one of aspects 25 to 45.

Aspect 58: an apparatus for wireless communication at a base station, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 46 to 48.

Aspect 59: an apparatus for wireless communication at a base station, comprising at least one means for performing the method of any of aspects 46-48.

Aspect 60: a non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform the method of any of aspects 46 to 48.

It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and other implementations are possible. Further, aspects from two or more methods may be combined.

Although aspects of the LTE, LTE-A, LTE-a Pro or NR system may be described for exemplary purposes and LTE, LTE-A, LTE-a Pro or NR terminology may be used in much of the description, the techniques described herein may also be applied to networks other than LTE, LTE-A, LTE-a Pro or NR networks. For example, the described techniques may be applied to various other wireless communication systems such as Ultra Mobile Broadband (UMB), institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, 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 in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software for execution by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwired or any combination thereof. Features that implement the functions may also be physically located in various places including being distributed such that parts of the functions are implemented at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Non-transitory storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can comprise 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-transitory medium that can be 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 special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the 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 medium. Disk (disc) and disc (disc), as used herein, includes CD, laser disc, optical disc, digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

As used herein (including in the claims), an "or" used in an item enumeration (e.g., an item enumeration with a phrase such as "at least one of" or "one or more of" attached) indicates an inclusive enumeration, such that, for example, enumeration of at least one of A, B or C means a or B or C or AB or AC or BC or ABC (i.e., a and B and C). Also, as used herein, the phrase "based on" should not be construed as referring to a closed set of conditions. For example, example steps described as "based on condition a" may be based on both condition a and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be read in the same manner as the phrase "based at least in part on".

The term "determining" or "determining" encompasses a wide variety of actions, and as such, "determining" may include calculating, computing, processing, deriving, exploring, looking up (such as via looking up in a table, database or other data structure), ascertaining, and the like. In addition, "determining" may include receiving (such as receiving information), accessing (such as accessing data in memory), and the like. Additionally, "determining" may include parsing, selecting, choosing, establishing, and other such similar actions.

In the drawings, similar components or features may have the same reference numerals. Further, individual components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If only the first reference number is used in the specification, the description may be applied to any one of the similar components having the same first reference number, regardless of the second reference number, or other subsequent reference numbers.

The description set forth herein in connection with the appended drawings describes example configurations and is not intended to represent all examples that may be implemented or fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," and does not mean "better than" or "over other examples. The detailed description includes specific details to provide an understanding of the described technology. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The description herein is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for wireless communication at a User Equipment (UE), comprising:

a processor;

a memory coupled to the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receiving an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel comprising first downlink control information associated with a random access procedure, scheduling of system information, or paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and a downlink control information message associated with the random access procedure, scheduling of system information, or the paging procedure; and

the first set of common search spaces is monitored for the downlink control channel based at least in part on the first set of common search spaces being configured in accordance with the validation rule.

2. The apparatus of claim 1, wherein the validation rule is that the UE does not expect a set of type 0, type 0a, type 1, or type 2 common search spaces to be linked to another set of search spaces.

3. The apparatus of claim 1, wherein the validation rule is that the UE does not expect a common set of search spaces with index 0 to be linked to another common set of search spaces.

4. An apparatus for wireless communication at a base station, comprising:

a processor;

a memory coupled to the processor; and

transmitting, to a User Equipment (UE), an indication that a first set of common search spaces is configured for a downlink control channel, the downlink control channel including first downlink control information associated with a random access procedure, a scheduling of system information, or a paging procedure, the first set of common search spaces being a unique set of common search spaces configured for the downlink control channel according to an acknowledgement rule, the acknowledgement rule relating to the linked set of common search spaces and a downlink control information message associated with the random access procedure, the scheduling of system information, or the paging procedure;

encoding the first downlink control information in the first set of common search spaces based at least in part on the first set of common search spaces being configured in accordance with the validation rule; and

Encoded first downlink control information is transmitted.

5. The apparatus of claim 4, wherein the validation rule is that the UE does not expect a set of type 0, type 0a, type 1, or type 2 common search spaces to be linked to another set of search spaces.

6. The apparatus of claim 4, wherein the validation rule is that the UE does not expect a common set of search spaces with index 0 to be linked to another common set of search spaces.

7. An apparatus for wireless communication at a User Equipment (UE), comprising:

a processor;

a memory coupled to the processor; and

receiving an indication that the first set of common search spaces and the second set of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or a paging procedure;

monitoring the first set of common search spaces and the second set of common search spaces for the downlink control information based at least in part on the indication; and

The downlink control information is decoded using at least one of a first physical downlink control channel candidate of the first set of common search spaces or a second physical downlink control channel candidate of the second set of common search spaces, wherein the first physical downlink control channel candidate is linked with the second physical downlink control channel candidate.

8. The apparatus of claim 7, wherein the instructions for receiving the indication are executable by the processor to cause the apparatus to:

receiving a first control message, the first control message comprising a configuration for repeatedly linking the first set of common search spaces with the second set of common search spaces; and

a second control message is received, the second control message indicating that the first set of common search spaces is monitored for the downlink control channel based at least in part on the downlink control information being associated with one of the random access procedure, scheduling of the system information, or the paging procedure.

9. The apparatus of claim 7, wherein the instructions for receiving the indication are executable by the processor to cause the apparatus to:

A control message is received indicating that both the first set of common search spaces and the second set of common search spaces are linked and both the first set of common search spaces and the second set of common search spaces are monitored for the downlink control channel based at least in part on the downlink control information being associated with one of the random access procedure, the scheduling of system information, or the paging procedure.

10. The apparatus of claim 9, wherein the instructions for receiving the control message are executable by the processor to cause the apparatus to:

a common physical downlink control channel configuration message is received indicating that both a first index associated with the first set of common search spaces and a second index associated with the second set of common search spaces correspond to the same common search space set type.

11. The apparatus of claim 7, wherein the instructions are further executable by the processor to cause the apparatus to:

determining a number of downlink control channel candidates for the first and second sets of common search spaces for a control channel element aggregation level of a set of control channel element aggregation levels, wherein the UE monitors the first and second sets of common search spaces based at least in part on the determined number of downlink control channel candidates.

12. The apparatus of claim 11, wherein the instructions for determining the number of downlink control channel candidates for the control channel element aggregation level are executable by the processor to cause the apparatus to:

identifying a mapping between the control channel element aggregation level and a number of downlink control channel candidates for the control channel element aggregation level; and

the number of downlink control channel candidates is assigned to both the first set of common search spaces and the second set of common search spaces.

13. The apparatus of claim 11, wherein the instructions for determining the number of downlink control channel candidates for the control channel element aggregation level are executable by the processor to cause the apparatus to:

one half of the number of downlink control channel candidates are assigned to both the first set of common search spaces and the second set of common search spaces.

14. The apparatus of claim 11, wherein the instructions for determining the number of downlink control channel candidates for the control channel element aggregation level are executable by the processor to cause the apparatus to:

the number of downlink control channel candidates is assigned to the first and second sets of common search spaces based at least in part on whether the first and second sets of common search spaces are positioned within a same transmission time interval.

15. The apparatus of claim 14, wherein:

when the first and second sets of common search spaces are located within the same transmission time interval, the UE assigns half of the number of downlink control channel candidates to either both the first and second sets of common search spaces, or; and is also provided with

The UE assigns the number of downlink control channel candidates to both the first and second sets of common search spaces when the first and second sets of common search spaces are positioned within separate transmission time intervals.

16. The apparatus of claim 11, wherein the instructions for determining the number of downlink control channel candidates for the control channel element aggregation level are executable by the processor to cause the apparatus to:

a mapping between the control channel element aggregation level and a number of downlink control channel candidates for the control channel element aggregation level is identified based at least in part on the first or second set of common search spaces having an index of 0.

17. The apparatus of claim 11, wherein the instructions for determining the number of downlink control channel candidates for the control channel element aggregation level are executable by the processor to cause the apparatus to:

a number of downlink control channel candidates for the control channel element aggregation level is determined based at least in part on a search space set configuration corresponding to both the first common search space set and the second common search space set.

18. The apparatus of claim 11, wherein the instructions are further executable by the processor to cause the apparatus to:

the total number of downlink control channel candidates is determined by determining the number for each control channel element aggregation level in the set of control channel element aggregation levels.

19. The apparatus of claim 7, wherein the instructions are further executable by the processor to cause the apparatus to:

receiving an indication that the first set of common search spaces has an index of 0;

receiving an indication of a first configuration for the first set of common search spaces in accordance with the first set of common search spaces having the index 0; and

an indication of a second configuration for the second set of common search spaces corresponding to the first configuration is received.

20. The apparatus of claim 7, wherein the instructions are further executable by the processor to cause the apparatus to:

receiving an indication that the first set of common search spaces has an index of 0, wherein the first set of common search spaces is associated with one or more first monitoring opportunities; and

one or more second monitoring occasions of the second set of common search spaces are monitored, the one or more second monitoring occasions of the second set of common search spaces mapped to the one or more first monitoring occasions of the first set of common search spaces according to the first set of common search spaces having the index 0.

21. The apparatus of claim 20, wherein the instructions are further executable by the processor to cause the apparatus to:

suppressing monitoring a second monitoring occasion of the second set of common search spaces that does not map to any of the one or more first monitoring occasions of the first set of common search spaces.

22. The apparatus of claim 20, wherein the instructions are further executable by the processor to cause the apparatus to:

the one or more second monitoring occasions of the second common set of search spaces are mapped to the one or more first monitoring occasions of the first common set of search spaces according to the first common set of search spaces and the second common set of search spaces being positioned within the same time slot or within consecutive time slots, a first number of the one or more first monitoring occasions relative to a second number of monitoring occasions of the second common set of search spaces, or a combination thereof.

23. The apparatus of claim 7, wherein the instructions are further executable by the processor to cause the apparatus to:

transmitting an indication that the UE supports the repetition of the downlink control channel, the downlink control channel including downlink control information associated with the random access procedure, scheduling of the system information, the paging procedure, or a combination thereof.

24. The apparatus of claim 23, wherein the instructions for transmitting the indication are executable by the processor to cause the apparatus to:

transmitting an indication of supporting each radio network temporary identifier type, transmitting an indication of supporting a link of a search space set with search space set 0, transmitting an indication of supporting an inter-slot link, transmitting an indication of supporting an intra-slot link, transmitting an indication of supporting a UE-specific search space set link, transmitting an indication of supporting a type 3 search space set link, or a combination thereof.

25. The apparatus of claim 23, wherein the instructions for transmitting the indication are executable by the processor to cause the apparatus to:

a separate indication specifying each of the support type 0, type 0A, type 1, and type 2 downlink control channel common search space set links is transmitted.

26. The apparatus of claim 23, wherein the instructions are further executable by the processor to cause the apparatus to:

a first control message is received based at least in part on transmitting the indication, the first control message including a configuration to repeatedly link the first set of common search spaces with the second set of common search spaces.

27. The apparatus of claim 7, wherein the first set of common search spaces and the second set of common search spaces are both a type 0 common search space set associated with a system information radio network temporary identifier, a type 0A common search space set associated with a system information radio network temporary identifier, a type 1 common search space set associated with a random access radio network temporary identifier, an MsgB radio network temporary identifier, or a temporary cell radio network temporary identifier, or a type 2 common search space set associated with a paging radio network temporary identifier.

28. An apparatus for wireless communication at a base station, comprising:

a processor;

a memory coupled to the processor; and

transmitting, to a User Equipment (UE), an indication that a first set of common search spaces and a second set of common search spaces are linked for repetition of a downlink control channel, the downlink control channel including downlink control information associated with a random access procedure, scheduling of system information, or paging procedure, the downlink control information being encoded in a first downlink control channel candidate and a second downlink control channel candidate linked to the first downlink control channel candidate based at least in part on the indication; and

Encoded downlink control information is transmitted to the UE in the first set of common search spaces including the first downlink control channel candidate and in the second set of common search spaces including the second downlink control channel candidate.

29. The apparatus of claim 28, wherein the instructions for transmitting the indication are executable by the processor to cause the apparatus to:

transmitting a first control message, the first control message comprising a configuration for repeatedly linking the first set of common search spaces with the second set of common search spaces; and

a second control message is transmitted, the second control message indicating that the first set of common search spaces is monitored for the downlink control channel based at least in part on the downlink control information being associated with one of the random access procedure, the scheduling of system information, or the paging procedure.

30. The apparatus of claim 28, wherein the instructions for transmitting the indication are executable by the processor to cause the apparatus to:

a control message is transmitted indicating that both the first set of common search spaces and the second set of common search spaces are linked and both the first set of common search spaces and the second set of common search spaces are monitored for the downlink control channel based at least in part on the downlink control information being associated with one of the random access procedure, the scheduling of system information, or the paging procedure.