Discontinuous Transmission and Discontinuous Reception Configuration for Sidelink Communication

Abstract

Methods, systems, and devices for wireless communication are described. A communication device supports sidelink communication, including device-to-device (D2D) communication and vehicle-based communication. The communication device receives a discontinuous transmission (DTX) configuration for a sidelink connection between the communication device and another device from the other device. Based on the received DTX configuration, the communication device determines a discontinuous reception (DRX) configuration and transmits the determined DRX configuration to the other device. The devices experience power savings and other results based on the DTX configuration or the DRX configuration.

Description

[0001] Cross-reference

[0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 62 / 979,985, filed on Feb. 21, 2020, by DUTTA et al. and entitled "DISCONTINUOUS TRANSMISSION AND DISCONTINUOUS RECEPTION CONFIGURATIONS FOR SIDELINK COMMUNICATIONS", and U.S. Patent Application No. 17 / 179,367, filed on Feb. 18, 2021, by DUTTA et al. and entitled "DISCONTINUOUS TRANSMISSION AND DISCONTINUOUS RECEPTION CONFIGURATIONS FOR SIDELINK COMMUNICATIONS", each of which is assigned to the assignee of this application.

[0003] Introduction

[0004] The following relates to wireless communications, and more particularly, to configurations for wireless communications.

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multi-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 Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM).

[0006] A wireless multi - access communication system may include one or more base stations or one or more network access nodes, where each base station or network access node supports the communication of multiple communication devices simultaneously, and these communication devices may also be referred to as user equipment (UE). Some wireless communication systems (such as 4G and 5G systems) can support sidelink communication between multiple communication devices. Examples of sidelink communication may include but are not limited to device - to - device (D2D) communication, vehicle - based communication (which may also be referred to as vehicle - to - everything (V2X) communication system, vehicle - to - vehicle (V2V) communication system, cellular V2X (C - V2X) communication system, etc.). As the demand for communication efficiency increases, it may be desirable for some wireless communication systems (such as 4G and 5G systems) to provide higher reliability and lower latency sidelink operations, etc., for sidelink communication.

[0007] Overview

[0008] A method for wireless communication at a first device is described. The method may include: receiving, from a second device, a discontinuous transmission configuration for a sidelink connection between the first device and the second device; and transmitting, to the second device, a discontinuous reception configuration for the sidelink connection, where the discontinuous reception configuration is based on the discontinuous transmission configuration.

[0009] An apparatus for wireless communication at a first device is described. The apparatus may include a processor and a memory coupled to the processor. The processor and the memory may be configured to: receive, from a second device, a discontinuous transmission configuration for a sidelink connection between the first device and the second device; and transmit, to the second device, a discontinuous reception configuration for the sidelink connection, where the discontinuous reception configuration is based on the discontinuous transmission configuration.

[0010] Another piece of equipment for wireless communication at a first device is described. The equipment may include: means for receiving, from a second device, a discontinuous transmission configuration for a sidelink connection between the first device and the second device; and means for transmitting, to the second device, a discontinuous reception configuration for the sidelink connection, where the discontinuous reception configuration is based on the discontinuous transmission configuration.

[0011] A non - transitory computer - readable medium storing code for wireless communication at a first device is described. The code may include instructions executable by a processor for: receiving, from a second device, a discontinuous transmission configuration for a sidelink connection between the first device and the second device; and transmitting, to the second device, a discontinuous reception configuration for the sidelink connection, where the discontinuous reception configuration is based on the discontinuous transmission configuration.

[0012] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: receiving, from a third device, a second discontinuous transmission configuration for a second sidelink connection between the first device and the third device.

[0013] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: determining a union of the discontinuous transmission configuration for the sidelink connection between the first device and the second device and the second discontinuous transmission configuration for the second sidelink connection between the first device and the third device, and wherein determining the discontinuous reception configuration may be based on the union, the discontinuous reception configuration including a pattern of one or more discontinuous reception cycles associated with the sidelink connection between the first device and the second device, or the second sidelink connection between the first device and the third device, or both.

[0014] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the discontinuous transmission configuration may be exclusively used for the sidelink connection.

[0015] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: transmitting, to the second device, a request message that includes a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of the following: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof, and wherein determining the discontinuous reception configuration may be based on the request to adjust the parameter associated with the discontinuous transmission configuration.

[0016] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: receiving, from the second device, a response message based on the request message, the response message being related to the request to adjust the parameter associated with the discontinuous transmission configuration, and wherein determining the discontinuous reception configuration may be based on the response message.

[0017] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the response message indicates one or more of the following: adjusted discontinuous transmission period, adjusted discontinuous transmission active duration, or adjusted discontinuous transmission offset, or any combination thereof, and the response message indicates a reason for rejecting the request to adjust the parameter associated with the discontinuous transmission configuration.

[0018] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: receiving, from a set of devices including the second device, a set of discontinuous transmission configurations for a set of sidelink connections including the sidelink connection between the first device and the second device.

[0019] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: determining a subset of sidelink connections in the set of sidelink connections that correspond to the same directional receive beam, the subset of sidelink connections including the sidelink connection between the first device and the second device, and wherein determining the discontinuous reception configuration may be based on the union of the discontinuous transmission configuration for the sidelink connection between the first device and the second device and one or more other discontinuous transmission configurations for corresponding sidelink connections in the subset of sidelink connections, the corresponding sidelink connection being between the first device and a corresponding other device associated with the corresponding sidelink connection.

[0020] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: determining the subset of sidelink connections in the set of sidelink connections that correspond to the same directional receive beam may be based on a receiver spatial configuration associated with the first device.

[0021] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, and the method, apparatus (equipment), and non-transitory computer-readable media may further include operations, features, means, or instructions for the following: a different peak quality of service metric for the corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, a different traffic throughput metric for the corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, a different spectral efficiency metric for the corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, a different reference signal received power metric for the corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, and a different reference signal received quality metric for the corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, or any combination thereof.

[0022] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: transmitting a request message to a third device, the request message including a request to adjust a parameter associated with a corresponding discontinuous transmission configuration associated with the third device, where the parameter includes one or more of the following: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof, and where determining the discontinuous reception configuration may be based on the request to adjust the parameter associated with the corresponding discontinuous transmission configuration associated with the third device.

[0023] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: transmitting to a set of devices including the second device the discontinuous transmission configuration and the discontinuous reception configuration for a set of sidelink connections including the sidelink connection between the first device and the second device.

[0024] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the discontinuous reception configuration may include operations, features, means, or instructions for the following actions: transmitting to the set of devices the discontinuous transmission configuration and the discontinuous reception configuration for the set of sidelink connections including the sidelink connection between the first device and the second device based on corresponding device identifiers associated with each device in the set of devices including the second device.

[0025] A method for wireless communication at a first device is described. The method may include: transmitting a discontinuous transmission configuration for a sidelink connection between the first device and a second device; and receiving, based on the discontinuous transmission configuration, a discontinuous reception configuration for the sidelink connection between the first device and the second device from the second device.

[0026] An apparatus for wireless communication at a first device is described. The apparatus may include a processor and a memory coupled to the processor. The processor and the memory may be configured to: transmit a discontinuous transmission configuration for a sidelink connection between the first device and a second device; and receive, based on the discontinuous transmission configuration, a discontinuous reception configuration for the sidelink connection between the first device and the second device from the second device.

[0027] Describes another apparatus for wireless communication at a first device. The apparatus may include: means for transmitting to a second device a discontinuous transmission configuration for a sidelink connection between the first device and the second device; and means for receiving from the second device a discontinuous reception configuration for the sidelink connection between the first device and the second device based on the discontinuous transmission configuration.

[0028] Describes a non-transitory computer-readable medium storing code for wireless communication at a first device. The code may include instructions executable by a processor for: transmitting to a second device a discontinuous transmission configuration for a sidelink connection between the first device and the second device; and receiving from the second device a discontinuous reception configuration for the sidelink connection between the first device and the second device based on the discontinuous transmission configuration.

[0029] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the discontinuous transmission configuration may be exclusively used for the sidelink connection.

[0030] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: receiving from the second device a request message that includes a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof.

[0031] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: transmitting to the second device a response message based on the request message, the response message being related to the request to adjust the parameter associated with the discontinuous transmission configuration.

[0032] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the response message indicates one or more of: adjusted discontinuous transmission period, adjusted discontinuous transmission active duration, or adjusted discontinuous transmission offset, or any combination thereof.

[0033] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the response message indicates a reason for rejecting the request to adjust the parameter associated with the discontinuous transmission configuration.

[0034] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the discontinuous transmission configuration may include operations, features, apparatuses, or instructions for the following actions: transmitting the discontinuous transmission configuration based on a sidelink connection procedure.

[0035] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the sidelink connection procedure includes a sidelink connection establishment procedure.

[0036] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the sidelink connection establishment procedure includes a unicast radio resource control sidelink connection establishment procedure.

[0037] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the discontinuous transmission configuration may include operations, features, apparatuses, or instructions for the following actions: transmitting the discontinuous transmission configuration in a radio resource control configuration message during the unicast radio resource control sidelink connection establishment procedure.

[0038] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the discontinuous transmission configuration includes a pattern of one or more discontinuous transmission cycles.

[0039] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the discontinuous transmission configuration including the pattern of one or more discontinuous transmission cycles includes a slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for transmitting sidelink communication on the sidelink connection.

[0040] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the discontinuous reception configuration includes a pattern of one or more discontinuous reception cycles.

[0041] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the discontinuous reception configuration including the pattern of one or more discontinuous reception cycles includes a slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for receiving sidelink communication on the sidelink connection.

[0042] A method for wireless communication at a first device is described. The method may include: receiving, from a second device, a discontinuous transmission (DTX) configuration for a sidelink connection between the first device and the second device; determining a discontinuous reception (DRX) configuration based on the DTX configuration; and transmitting, to the second device, the DRX configuration for the sidelink connection.

[0043] A first apparatus for wireless communication is described. The first apparatus may include a processor and a memory coupled to the processor. The processor and the memory may be configured to: receive, from a second apparatus, a DTX configuration for a sidelink connection between the first apparatus and the second apparatus; determine a DRX configuration based on the DTX configuration; and transmit, to the second apparatus, the DRX configuration for the sidelink connection.

[0044] Another first device for wireless communication is described. The first device may include means for: receiving, from a second device, a DTX configuration for a sidelink connection between the first device and the second device; determining a DRX configuration based on the DTX configuration; and transmitting, to the second device, the DRX configuration for the sidelink connection.

[0045] A non-transitory computer-readable medium storing code for wireless communication at a first device is described. The code may include instructions executable by a processor for: receiving, from a second device, a DTX configuration for a sidelink connection between the first device and the second device; determining a DRX configuration based on the DTX configuration; and transmitting, to the second device, the DRX configuration for the sidelink connection.

[0046] In some examples of the methods, devices, and non-transitory computer-readable media described herein, the DTX configuration may be exclusively used for the sidelink connection.

[0047] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: receiving, from a third device, a second DTX configuration for a second sidelink connection between the first device and the third device.

[0048] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: determining the union of the DTX configuration for the sidelink connection between the first device and the second device and the second DTX configuration for the second sidelink connection between the first device and the third device, wherein determining the DRX configuration may be based on the union, and the DRX configuration includes a pattern of one or more DRX cycles associated with the sidelink connection between the first device and the second device, or the second sidelink connection between the first device and the third device, or both.

[0049] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: receiving, from a set of devices including the second device, a set of DTX configurations for a set of sidelink connections including the sidelink connection between the first device and the second device.

[0050] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: determining a subset of sidelink connections in the set of sidelink connections that correspond to the same directional reception beam, the subset of sidelink connections including the sidelink connection between the first device and the second device, wherein determining the DRX configuration may be based on the union of the DTX configuration for the sidelink connection between the first device and the second device and one or more other DTX configurations for corresponding sidelink connections in the subset of sidelink connections, the corresponding sidelink connection being between the first device and a corresponding other device associated with the corresponding sidelink connection.

[0051] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: determining the subset of sidelink connections in the set of sidelink connections that correspond to the same directional reception beam may be based on a receiver spatial configuration associated with the first device.

[0052] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DRX configuration includes a pattern of one or more DRX cycles, each DRX cycle in the pattern corresponding to a different peak quality of service metric for a corresponding DTX configuration among one or more other DTX configurations.

[0053] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DRX configuration includes a pattern of one or more DRX cycles, each DRX cycle in the pattern corresponding to a different traffic throughput metric for a corresponding DTX configuration among one or more other DTX configurations.

[0054] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DRX configuration includes a pattern of one or more DRX cycles, each DRX cycle in the pattern corresponding to a different spectral efficiency metric for a corresponding DTX configuration among one or more other DTX configurations.

[0055] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DRX configuration includes a pattern of one or more DRX cycles, where each DRX cycle in the pattern corresponds to a different reference signal received power metric of a corresponding DTX configuration in one or more other DTX configurations.

[0056] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DRX configuration includes a pattern of one or more DRX cycles, where each DRX cycle in the pattern corresponds to a different reference signal received quality metric of a corresponding DTX configuration in one or more other DTX configurations.

[0057] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: transmitting a request message to the second device, the request message including a request to adjust a parameter associated with the DTX configuration, where the parameter includes one or more of the following: DTX period, DTX active duration, or DTX offset, or any combination thereof, where determining the DRX configuration may be based on the request to adjust the parameter associated with the DTX configuration.

[0058] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: receiving a response message from the second device based on the request message, the response message related to the request to adjust the parameter associated with the DTX configuration, where determining the DRX configuration is based on the response message.

[0059] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the response message indicates one or more of the following: adjusted DTX period, adjusted DTX active duration, or adjusted DTX offset, or any combination thereof.

[0060] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the response message indicates a reason for rejecting the request to adjust the parameter associated with the DTX configuration.

[0061] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: transmitting a request message to a third device, the request message including a request to adjust a parameter associated with a corresponding DTX configuration associated with the third device, where the parameter includes one or more of the following: DTX period, DTX active duration, or DTX offset, or any combination thereof, where determining the DRX configuration may be based on the request to adjust the parameter associated with the corresponding DTX configuration associated with the third device.

[0062] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: transmitting, to a set of devices including the second device, the DTX configuration and the DRX configuration for a set of sidelink connections including the sidelink connection between the first device and the second device.

[0063] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the DRX configuration may include operations, features, means, or instructions for the following actions: transmitting, to the set of devices, the DTX configuration and the DRX configuration for the set of sidelink connections including the sidelink connection between the first device and the second device, based on corresponding device identifiers associated with each device in the set of devices including the second device.

[0064] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: receiving, from a set of devices including the second device, a set of DRX configurations for a set of sidelink connections including the sidelink connection between the first device and the second device.

[0065] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: adjusting a pattern of one or more DRX cycles based on a DTX configuration received from the second device for the sidelink connection.

[0066] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: transmitting an indication of the adjusted pattern to the set of devices for each device in the set of devices to align DTX timing, wherein the first device has a corresponding sidelink connection with each device in the set of devices.

[0067] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: adjusting a pattern of one or more DRX cycles associated with the DRX configuration based on a trigger; and transmitting an update message to the second device based on the adjustment, the update message including an RRC update message including a DTX offset adjustment request.

[0068] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the trigger includes a new sidelink connection, a new sidelink application, or both.

[0069] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: identifying capability information; and transmitting, to the second device, a message including the capability information associated with the first device, the message including an RRC connection message.

[0070] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: enabling a DRX reconfiguration mode based on the capability information.

[0071] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: monitoring one or more DRX cycles based on the DRX configuration; and activating a DRX timer based on the monitoring.

[0072] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: determining, based on the monitoring, that there is no data from the second device during the one or more DRX cycles, wherein activating the DRX timer may be based on the absence of data from the second device during the one or more DRX cycles.

[0073] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: adjusting a mode of one or more DRX cycles based on the expiration of the DRX timer.

[0074] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, adjusting the mode of the one or more DRX cycles may include operations, features, apparatuses, or instructions for the following actions: modifying the length of the one or more DRX cycles.

[0075] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: transmitting, to the second device, an indication of the modified length of the one or more DRX cycles.

[0076] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the DTX configuration may include operations, features, apparatuses, or instructions for the following actions: receiving the DTX configuration based on a sidelink connection procedure.

[0077] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the sidelink connection procedure includes a sidelink connection establishment procedure.

[0078] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the sidelink connection establishment procedure includes a unicast RRC sidelink connection establishment procedure.

[0079] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the DTX configuration may include operations, features, apparatuses, or instructions for: receiving the DTX configuration in an RRC configuration message during the unicast RRC sidelink connection establishment procedure.

[0080] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration includes a pattern of one or more DTX cycles.

[0081] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration including the pattern of one or more DTX cycles includes a slot offset, frame offset, periodicity, or active duration, or any combination thereof, for transmitting sidelink communications on the sidelink connection.

[0082] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DRX configuration includes a pattern of one or more DRX cycles.

[0083] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DRX configuration including the pattern of one or more DRX cycles includes a slot offset, frame offset, periodicity, or active duration, or any combination thereof, for receiving sidelink communications on the sidelink connection.

[0084] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for: identifying a DTX period, DTX active duration, or DTX offset, or any combination thereof, based on the DTX configuration, wherein determining the DRX configuration may be based on the DTX period, the DTX active duration, or the DTX offset, or any combination thereof.

[0085] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, one or more of the DTX period, DTX active duration, or DTX offset may be based on the traffic load associated with the sidelink connection.

[0086] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, one or more of the DTX period, DTX active duration, or DTX offset may be based on the data radio bearer configuration associated with the sidelink connection.

[0087] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the wireless communication includes sidelink communication.

[0088] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the sidelink communication includes V2X communication.

[0089] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: receiving the DTX configuration for the sidelink connection may be based on a broadcast connection associated with the second device.

[0090] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration may be common for all sidelink connections associated with a broadcast connection associated with the second device, wherein the DTX configuration may be common for at least the sidelink connection between the first device and the second device and the second sidelink connection between the third device and the second device.

[0091] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, one or more DTX configurations vary on one or more sidelink connections associated with a broadcast connection associated with the second device based on the unicast traffic load associated with the one or more sidelink connections.

[0092] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following action: receiving the DTX configuration for the sidelink connection may be based on a multicast connection associated with the second device.

[0093] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration may be common for all sidelink connections associated with a multicast connection associated with the second device, wherein the DTX configuration may be common for at least the sidelink connection between the first device and the second device and the second sidelink connection between the third device and the second device.

[0094] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, one or more DTX configurations vary on one or more sidelink connections associated with a multicast connection associated with the second device based on the unicast traffic load associated with the one or more sidelink connections.

[0095] A method for wireless communication at a first device is described. The method may include: determining a DTX configuration for a sidelink connection between the first device and a second device; transmitting the DTX configuration to the second device; and receiving, based on the DTX configuration, a DRX configuration for the sidelink connection between the first device and the second device from the second device.

[0096] A first apparatus for wireless communication is described. The first apparatus may include a processor and a memory coupled to the processor. The processor and the memory may be configured to: determine a DTX configuration for a sidelink connection between the first apparatus and a second apparatus; transmit the DTX configuration to the second apparatus; and receive, based on the DTX configuration, a DRX configuration for the sidelink connection between the first apparatus and the second apparatus from the second apparatus.

[0097] Another first equipment for wireless communication is described. The first equipment may include means for: determining a DTX configuration for a sidelink connection between the first equipment and a second equipment; transmitting the DTX configuration to the second equipment; and receiving, based on the DTX configuration, a DRX configuration for the sidelink connection between the first equipment and the second equipment from the second equipment.

[0098] A non-transitory computer-readable medium storing code for wireless communication at a first device is described. The code may include instructions executable by a processor for: determining a DTX configuration for a sidelink connection between the first device and a second device; transmitting the DTX configuration to the second device; and receiving, based on the DTX configuration, a DRX configuration for the sidelink connection between the first device and the second device from the second device.

[0099] In some examples of the methods, devices, and non-transitory computer-readable media described herein, the DTX configuration may be exclusively used for the sidelink connection.

[0100] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: receiving a request message from the second device, the request message including a request to adjust a parameter associated with the DTX configuration, where the parameter includes one or more of: DTX period, DTX active duration, or DTX offset, or any combination thereof.

[0101] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: transmitting a response message to the second device based on the request message, the response message being related to the request to adjust the parameter associated with the DTX configuration.

[0102] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the response message indicates one or more of the following: an adjusted DTX period, an adjusted DTX active duration, or an adjusted DTX offset, or any combination thereof.

[0103] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the response message indicates the reason for rejecting the request to adjust the parameter associated with the DTX configuration.

[0104] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the DTX configuration may include operations, features, means, or instructions for the following action: transmitting the DTX configuration based on a sidelink connection procedure.

[0105] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the sidelink connection procedure includes a sidelink connection establishment procedure.

[0106] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the sidelink connection establishment procedure includes a unicast RRC sidelink connection establishment procedure.

[0107] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the DTX configuration may include operations, features, means, or instructions for the following action: transmitting the DTX configuration in an RRC configuration message during the unicast RRC sidelink connection establishment procedure.

[0108] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration includes a pattern of one or more DTX cycles.

[0109] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration including the pattern of one or more DTX cycles includes a slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for transmitting sidelink communication on the sidelink connection.

[0110] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DRX configuration includes a pattern of one or more DRX cycles.

[0111] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DRX configuration including the pattern of one or more DRX cycles includes a slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for receiving sidelink communication on the sidelink connection.

[0112] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration includes a DTX period, a DTX active duration, or a DTX offset, or any combination thereof.

[0113] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, one or more of the DTX period, the DTX active duration, or the DTX offset may be based on the traffic load associated with the sidelink connection.

[0114] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, one or more of the DTX period, the DTX active duration, or the DTX offset may be based on the data radio bearer configuration associated with the sidelink connection.

[0115] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the wireless communication includes sidelink communication.

[0116] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the sidelink communication includes V2X communication.

[0117] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the DTX configuration may include operations, features, means, or instructions for: broadcasting the DTX configuration to a set of devices based on a broadcast connection associated with the set of devices including the second device.

[0118] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration may be common for all sidelink connections associated with the broadcast connection associated with the set of devices.

[0119] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration may be common for at least the sidelink connection between the first device and the second device and the second sidelink connection between the third device and the first device.

[0120] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, one or more DTX configurations vary based on the unicast traffic load associated with one or more sidelink connections on one or more sidelink connections associated with the broadcast connection associated with the set of devices.

[0121] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the DTX configuration may include operations, features, means, or instructions for: transmitting the DTX configuration to a set of devices based on a multicast connection associated with the set of devices including the second device.

[0122] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DTX configuration may be common for all sidelink connections associated with a multicast connection, where the DTX configuration may be common for at least the sidelink connection between the first device and the second device and a second sidelink connection between a third device and the first device.

[0123] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, one or more DTX configurations vary based on unicast traffic load associated with one or more sidelink connections on a multicast connection associated with a set of devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0125] Figures 1 to 4 An example of a wireless communication system in accordance with one or more aspects of the present disclosure is illustrated.

[0126] Figures 5 to 6 An example of a transmission timeline in accordance with one or more aspects of the present disclosure is illustrated.

[0127] Figure 7 and 8 A block diagram of a device in accordance with one or more aspects of the present disclosure is shown.

[0128] Figure 9 A block diagram of a communication manager in accordance with one or more aspects of the present disclosure is shown.

[0129] Figure 10 A diagram of a system including a device in accordance with one or more aspects of the present disclosure is shown.

[0130] Figures 11 to 16 A flowchart illustrating a method in accordance with one or more aspects of the present disclosure is shown.

[0131] Figure 17 A flowchart illustrating a method in accordance with one or more aspects of the present disclosure is shown.

[0132] DETAILED DESCRIPTION

[0133] A wireless communication system may include multiple communication devices, such as UEs and base stations (which may provide wireless communication services to UEs). For example, such base stations may be next-generation Node Bs or gigabit Node Bs that support multiple radio access technologies (either of which may be referred to as a gNB), and these radio access technologies include 4G systems (such as LTE systems) and 5G systems (which may be referred to as NR systems). Some wireless communication systems may also support sidelink communication between multiple UEs. Examples of sidelink communication may include, but are not limited to, D2D communication, vehicle-based communication (which may also be referred to as a V2X communication system, a V2V communication system, etc.). As the demand for communication efficiency, reliability, and latency increases, it may be desirable for a wireless communication system to provide higher reliability and lower latency sidelink operations, etc., for sidelink communication.

[0134] In some examples, the wireless communication between a base station and a UE may include DTX operations or DRX operations or both to provide power savings at the UE. Different from the wireless communication between a base station and a UE, the sidelink communication between multiple UEs may not include DTX operations or DRX operations. In the case of sidelink communication, a first UE may not assume that a second UE (e.g., a peer UE) is available to always listen for transmissions from the first UE. Accordingly, the first UE may transmit the DTX configuration of the first UE to the second UE so that the second UE can determine when the first UE will transmit a message. Otherwise, even if the first UE transmits at a relatively infrequent period, the second UE will always remain awake.

[0135] A UE may establish a sidelink connection with one or more other UEs in a wireless communication system (e.g., such as a V2X communication system). In some examples, the UE may support unicast communication, broadcast communication, or multicast communication, or a combination thereof. To provide higher reliability and lower latency for sidelink communication, the UE may be configured to support DTX operation or DRX operation or both. For example, the UE may be configured with a DTX configuration (e.g., receive the DTX configuration or determine the DTX configuration based on the configuration of the UE), or may be configured with a DRX configuration (e.g., receive the DRX configuration or determine the DRX configuration based on the configuration of the UE), or both of the above. In some examples of unicast communication, a UE (e.g., a receiving UE) may receive a DTX configuration from another UE (e.g., a transmitting UE) via a connection (e.g., a sidelink connection), and the DTX configuration may identify a pattern of a DTX cycle dedicated to the UE (e.g., the receiving UE). The DTX cycle may include an active DTX duration (e.g., a period during which the UE's transmitter is active or transmitting), an inactive DTX duration (e.g., a period during which the UE's transmitter is inactive or in sleep), etc., as described herein. In some cases, the DTX mode may indicate when the UE may be configured to transmit data / control information (e.g., the DTX active duration) and when the UE's transmitter circuitry is in sleep or inactive (e.g., the DTX inactive duration).

[0136] In some examples of broadcast communication and multicast communication, a UE (e.g., a transmitting UE) may broadcast or transmit a DTX configuration to all UEs or a group of UEs on multiple connections (e.g., multiple sidelink connections). In such examples, the DTX configuration may thus be common to all UEs or the group of UEs. Although the DTX configuration may be the same for all UEs or the group of UEs, each UE may have different unicast traffic on the corresponding sidelink connection in some examples.

[0137] As part of DRX operation, a UE may determine a DRX configuration based on one or more received DTX configurations. The DRX configuration identifies one or more DRX cycles, which may include an active DRX duration (e.g., a period of time during which the UE's receiver is active or monitoring), an inactive DRX duration (e.g., a period of time during which the UE's receiver is inactive or in sleep), and so on, as described herein. In some cases, the DRX pattern may indicate when the UE may be configured to receive data / control information (e.g., the DRX active duration) and when the UE's receiver circuitry is in sleep or inactive (the DRX inactive duration). Similarly, in some examples of unicast communication, a UE may transmit a DRX configuration to another UE via a connection (e.g., sidelink communication), and the DRX configuration may identify the pattern of a DRX cycle dedicated to that UE. In some examples of broadcast communication and multicast communication, a UE may transmit or broadcast a DRX configuration to all UEs or a group of UEs over multiple connections (e.g., multiple sidelink connections). The DRX configuration may thus be common to all UEs or the group of UEs. Accordingly, by implementing DRX operation and DTX operation for sidelink communication, the associated UEs may experience power savings due to providing the DTX configuration or the DRX configuration or both.

[0138] Particular aspects of the subject matter described in this disclosure may be implemented to achieve power savings and provide higher reliability and lower latency sidelink operation for sidelink communication. Techniques employed by a UE may provide power savings for the operation of the UE. For example, operations performed by the UE may provide power savings for sidelink operation. In some examples, configuring the UE to support a DRX configuration or a DRX configuration or both for sidelink communication may support reduced power consumption, increased spectral efficiency, and in some examples, may facilitate increased efficiency of sidelink operation and other benefits.

[0139] Aspects of the present disclosure are initially described in the context of a wireless communication system. Aspects of the present disclosure are subsequently illustrated and described by and with reference to a transmission timeline related to DTX and DRX configurations for sidelink communication. Aspects of the present disclosure are further illustrated and described by and with reference to block diagrams, system diagrams, and flowcharts related to DTX and DRX configurations for sidelink communication.

[0140] Figure 1An example of a wireless communication system 100 in accordance with one or more aspects of the present disclosure is illustrated. 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 an LTE network, an LTE-A network, an LTE-A Pro network, or an NR network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0141] The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may be devices of different forms or having different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110, and the UEs 115 and the base stations 105 may establish one or more communication links 125 over the coverage area 110. The coverage area 110 may be an example of a geographic area over which the base stations 105 and the UEs 115 may support signal communication according to one or more radio access technologies.

[0142] 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. The UEs 115 may be devices of different forms or having different capabilities. Some example UEs 115 are illustrated in Figure 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 Figure 1 shown in

[0143] Each base station 105 can communicate with the core network 130, communicate with each other, or both. For example, the base station 105 can interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 can communicate with each other directly (e.g., directly between the base stations 105), indirectly (e.g., via the core network 130), or both directly and indirectly over the backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul link 120 can be or include one or more wireless links. One or more of the base stations 105 described herein can include or can be referred to by those of ordinary skill in the art as a base transceiver station, radio base station, access point, radio transceiver, Node B, evolved Node B (eNB), next-generation Node B, or gigabit Node B (any of which can be referred to as a gNB), home Node B, home evolved Node B, or other suitable terms.

[0144] The UE 115 can include or can be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, where "device" can also be referred to as a unit, station, terminal, or client, etc. The UE 115 can also include or can be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, the UE 115 can include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine type communication (MTC) device, etc., which can be implemented in various objects such as appliances, vehicles, meters, etc. The UE 115 described herein can be capable of communicating with various types of devices (such as other UEs 115 that can sometimes act as relays, as well as base stations 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc.), as Figure 1 shown.

[0145] UE 115 and base station 105 may wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operation, user data, or other signaling. The wireless communication system 100 may support communicating with UE 115 using carrier aggregation or multi-carrier operation. UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0146] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling for coordinating the operation of other carriers. A carrier may be associated with a frequency channel (e.g., 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 raster for discovery by UE 115. A carrier may operate in a stand-alone mode in which initial acquisition and connection may be made by UE 115 via the carrier, or a carrier may operate in a non-stand-alone mode in which the connection is anchored using a different carrier (e.g., a different carrier of the same or different radio access technology). The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from UE 115 to base station 105, or a downlink transmission from base station 105 to UE 115. A carrier may carry downlink or uplink communication (e.g., in FDD mode), or may be configured to carry both downlink communication and uplink communication (e.g., in TDD mode).

[0147] A carrier may be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or the wireless communication system 100. For example, the carrier bandwidth may be one of several defined bandwidths of a carrier of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communication system 100 (e.g., the base station 105, the UE 115, or both) may have a hardware configuration that supports communication on a specific carrier bandwidth or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a 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 on a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0148] The signal waveform transmitted on a carrier may include multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing an MCM technique, a resource element may include one symbol period (e.g., the duration of one modulated symbol) and one subcarrier, where the symbol period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate of the UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and using multiple spatial layers may further increase the data rate or data integrity of communication with the UE 115.

[0149] One or more parameter sets may be supported for a carrier, where a parameter set may include subcarrier spacing (Δf) and cyclic prefix. A carrier may be divided into one or more BWPs with the same or different parameter sets. In some examples, the UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communication for the UE 115 may be limited to one or more active BWPs. The time intervals of the base station 105 or the UE 115 may be expressed as multiples of a basic time unit, which may refer to, for example, the sampling period T s = 1 / (Δf max ·N f ) seconds, where Δf max may represent the maximum supported subcarrier spacing, and N fmay represent the maximum supported Discrete Fourier Transform (DFT) size. The time intervals of communication resources may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0150] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time 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 time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of 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 each containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band. A subframe, time slot, mini-slot, or symbol may be the smallest 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 a 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 TTI (sTTI)).

[0151] Physical channels may be multiplexed on a carrier according to various techniques. The physical control channel and the physical data channel may be multiplexed on a downlink carrier using, for example, one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for the physical control channel may be defined by the number of symbol periods and may extend across the system bandwidth of the carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESET) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCE)) associated with the encoded information for a control information format having a given payload size. The search space set may include a common search space set configured to send control information to a plurality of UEs 115 and a UE-specific search space set configured to send control information to a specific UE 115.

[0152] Each base station 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hotspots, 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 for distinguishing adjacent cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area 110 or a portion of the geographic coverage area 110 (e.g., a sector) on which the logical communication entity operates. The scope of such cells may vary depending on various factors (such as the capabilities of the base station 105) from a smaller area (e.g., a structure, a subset of a structure) to a larger area. For example, a cell may be or include a building, a subset of a building, or an external space between or overlapping with the geographic coverage area 110, and other examples.

[0153] Macro cells cover a relatively large geographic area (e.g., with a radius of several kilometers) and may allow unconstrained access for UEs 115 having a service subscription with the network provider supporting the macro cell. Small cells may be associated with lower power base stations 105 (compared to macro cells), and small cells may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unconstrained access for UEs 115 having a service subscription with the network provider, or may provide constrained access for UEs 115 associated 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 on 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.

[0154] In some examples, the base station 105 may be mobile and thus provide communication coverage for a 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.

[0155] Wireless communication system 100 may support synchronous or asynchronous operations. For synchronous operations, base stations 105 may have similar frame timings, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operations, base stations 105 may have different frame timings, and in some examples, transmissions from different base stations 105 may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operations.

[0156] 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 data communication technologies that allow devices to communicate with each other or with base stations 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices integrated with sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents the information to a person interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wilderness survival monitoring, weather and geographical event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0157] Some UEs 115 may be configured to operate in power-saving modes, such as half-duplex communication (e.g., a mode that supports one-way communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power-saving techniques for UEs 115 include entering a deep sleep power-saving mode when not participating in active communication, operating on limited bandwidth (e.g., according to narrowband communication), 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 within a carrier, in a guard band of the carrier, or outside the carrier (e.g., a set of subcarriers or resource blocks (RBs)).

[0158] 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 communication (URLLC) or mission-critical communication. The UE 115 may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private communication or group communication and may be supported by one or more mission-critical services such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency may be used interchangeably herein.

[0159] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and the EPC or 5GC may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)), and at least one user plane entity that routes packets or interconnects to an external network (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as the mobility, authentication, and bearer management of the UE 115 served by the base station 105 associated with the core network 130. User IP packets may be passed through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the network operator IP services 150. The operator IP services 150 may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or a packet-switched streaming service.

[0160] Some network devices (such as the base station 105) may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with the respective UEs 115 through one or more other access network transport entities 145, which may be referred to as radio heads, intelligent radio heads, or transmit / receive 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 the base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or combined into a single network device (e.g., the base station 105).

[0161] The wireless communication system 100 may operate using one or more frequency bands in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The 300 MHz to 3 GHz division is referred to as the ultra-high frequency (UHF) division or the decimeter band because the wavelengths are in the range of approximately one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can sufficiently penetrate various structures for macrocells to provide service to UEs 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, UHF wave transmissions can be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers).

[0162] The wireless communication system 100 may also operate in the super-high frequency (SHF) division of the frequency band from 3 GHz to 30 GHz (also referred to as the centimeter band) or in the extremely high frequency (EHF) division of the spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as the millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the devices. However, the propagation of EHF transmissions may experience even greater atmospheric attenuation and shorter ranges than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency divisions, and the use of frequency bands designated across these frequency divisions may vary by country or regulatory body.

[0163] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency 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 an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio frequency band, devices such as the base station 105 and the UE 115 may employ carrier sensing for collision detection and avoidance. In some examples, operation in the unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with a component carrier operating in a licensed band. Operation in the unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer (P2P) transmissions, or device-to-device (D2D) transmissions, among others.

[0164] The base station 105 or the UE 115 may be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of the base station 105 or the UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may co-locate at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having several rows and columns of antenna ports for beamforming that the base station 105 can use to support communication with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0165] The base station 105 or the UE 115 can use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. 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. Similarly, the receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0166] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., the base station 105, the UE 115) to shape or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining the signals communicated via the 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 signals communicated via the antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements 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., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0167] Base station 105 or UE 115 may use beam sweeping techniques as part of beamforming operations. For example, base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by base station 105 multiple times in different directions. For example, 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 the transmitting device (such as base station 105) or the receiving device (such as UE 115)) to identify the beam direction that base station 105 will use for later transmission or reception.

[0168] Some signals (such as data signals associated with a particular receiving device) may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with the receiving device (such as UE 115)). In some examples, the beam direction associated with a transmission 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 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality to base station 105.

[0169] In some examples, transmissions performed by a device (e.g., by base station 105 or UE 115) may use multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from base station 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may transmit reference signals that may or may not be precoded (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)). UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). 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 to transmit signals multiple times in different directions (e.g., to identify the beam direction that UE 115 will use for subsequent transmission or reception) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0170] A receiving device (e.g., UE 115) may attempt multiple receive configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a base station 105. For example, the receiving device may attempt multiple receive directions by: receiving via different antenna sub-arrays, processing received signals according to different antenna sub-arrays, receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receive configurations or receive directions. In some examples, the receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned in 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).

[0171] The wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In 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 for communication over logical channels. The media 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 at the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer may provide the establishment, configuration, and maintenance of an RRC connection that supports the radio bearers for user plane data between the UE 115 and the base station 105 or the core network 130. At the physical layer, transport channels may be mapped to physical channels.

[0172] 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 correctly received over a 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 the throughput of the MAC layer in poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support simultaneous slot HARQ feedback, where the device may provide HARQ feedback for data received in previous symbols in a particular slot in that slot. In other cases, the device may provide HARQ feedback in a subsequent slot or according to some other time interval.

[0173] The wireless communication system 100 can be a 4G or 5G system and can support DRX operation for power saving. The UE 115 in the wireless communication system 100 can support DRX operation to reduce power consumption when the UE 115 has no data to transmit or no expected data to receive. In some examples, the UE 115 can be configured with or determine a DRX configuration for DRX operation. The DRX configuration can identify the pattern of one or more DRX cycles, which can include an active DRX duration, an inactive DRX duration, and so on.

[0174] During the active DRX duration of a DRX cycle, the UE 115 can wake up and monitor physical channels (e.g., Physical Downlink Control Channel (PDCCH), Physical Downlink Shared Channel (PDSCH)) to receive various types of communication content (e.g., control information, data). The UE 115 can monitor the physical channels during monitoring opportunities (e.g., several time slots). In some examples, the UE 115 can wake up and perform a random access procedure (e.g., Random Access Channel (RACH) procedure) with the base station 105 to receive various types of communication content from the base station 105. Additionally, during the inactive DRX duration of a DRX cycle, the UE 115 can power off, thereby experiencing power saving during the DRX cycle.

[0175] In some examples, the UE 115 can also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication can be within the geographical coverage area 110 of the base station 105. Other UEs 115 in such a group can be outside the geographical coverage area 110 of the base station 105 or unable to receive transmissions from the base station 105 for other reasons. In some examples, groups of UEs 115 communicating via D2D communication can utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the base station 105.

[0176] The D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel (also referred to as a sidelink connection)) between vehicles (e.g., UE 115). In some examples, vehicles can communicate using V2X communication, V2V communication, or some combination of these communications. The vehicle can signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units), or with the network, or with both, using vehicle-to-network (V2N) communication via one or more network nodes (e.g., base station 105).

[0177] In some cases, in the wireless communication system 100 (e.g., such as in a 4G or 5G system), the base station 105 can continuously listen for transmissions from the UEs 115 within its geographical coverage area 110. Thus, the UE 115 can exclusively support DRX operation because the base station 105 listens (e.g., always listens) for transmissions from the UE 115. That is, the DTX configuration of the UE 115 may not be necessary because the base station 150 continuously listens for transmissions from the UE 115. However, in some examples, such as in a 4G or 5G system that supports sidelink communication, the UE 115 can be configured to support both DTX and DRX operations for sidelink communication to save power. In other words, the UE 115 that supports sidelink communication can support both DTX and DRX operations because the UE 115 in sidelink communication cannot assume that another UE 115 (with which it may have a sidelink connection) is available (e.g., idle, always idle) to listen for transmissions from the UE 115.

[0178] The wireless communication system 100 can provide higher reliability and lower latency sidelink operations, etc., for sidelink communication. The UE 115 can include a communication manager 101, which can manage communications (e.g., sidelink communications) with other UEs 115. The communication manager 101 can be as described with reference to Figures 8 to 11Examples of aspects of the communication manager described therein. A UE 115 (e.g., a vehicle in a V2X system) may receive a DTX configuration for a sidelink connection between the UE 115 and another UE 115 (e.g., another vehicle in a V2X system). In some examples, the DTX configuration may provide an indication of one or more DRX cycles including an active DTX duration, an inactive DTX duration, and the like. As such, a peer UE 115 (e.g., the receiving UE 115) may know when to expect transmissions from another peer UE 115 (e.g., the transmitting UE 115) on one or more sidelink connections. In the absence of a DTX configuration, the peer UE 115 (e.g., the receiving UE 115) may have to remain awake continuously, even if the other peer UE 115 (e.g., the transmitting UE 115) has no transmissions for the peer UE 115, thus wasting resources (e.g., the battery life of the UE 115).

[0179] The UE 115 may determine a DRX configuration based on the received DTX configuration and transmit the DRX configuration for the sidelink connection to the other UE 115. In some examples, the DRX configuration may provide an indication of one or more DRX cycles including an active DRX duration, an inactive DRX duration, and the like. By supporting a DTX configuration or a DRX configuration or one or more configurations of both for sidelink communication, the UE 115 in the wireless communication system 100 may experience power savings and other benefits. In other aspects, configuring the UE 115 to support a DTX configuration or a DRX configuration or both for sidelink communication may support increased spectral efficiency and, in some examples, may facilitate increased efficiency of sidelink operation and other benefits.

[0180] Figure 2 An example of a wireless communication system 200 in accordance with one or more aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. For example, the wireless communication system 200 may support multiple radio access technologies, including 4G systems (such as an LTE system, an LTE-A system, or an LTE-A Pro system), and 5G systems (which may be referred to as an NR system). The wireless communication system 200 may also support sidelink communication between multiple UEs 115 (such as between UE 115-a and UE 115-b, which may be examples of corresponding devices described with reference to Figure 1 ). Examples of sidelink communication may include D2D communication, V2X communication systems, V2V communication systems, and the like. The wireless communication system 200 may also support reduced power consumption and, in some examples, may facilitate higher reliability and lower latency sidelink communication and other benefits.

[0181] UE 115-a and UE 115-b can be configured with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output communication, or beamforming, or any combination thereof. The antennas of UE 115-a and UE 115-b can be located within one or more antenna arrays or antenna panels that can support multiple-input multiple-output operations or transmit or receive beamforming. UE 115-a can have an antenna array that has several rows and columns of antenna ports for beamforming that UE 115-a can use to support communication (e.g., sidelink communication) with UE 115-b or multiple other UEs. Similarly, UE 115-b can have one or more antenna arrays that can support various multiple-input multiple-output or beamforming operations for communication (e.g., sidelink communication) with UE 115-a or multiple other UEs. Additionally or alternatively, the antenna panel can support radio frequency beamforming for signals transmitted via one or more antenna ports. UE 115-a and UE 115-b can thus be configured to support directional sidelink communication using multiple antennas.

[0182] UE 115-a, UE 115-b, or both in the wireless communication system 200 can support operations for saving resources (e.g., time and frequency resources of the wireless communication system 200), battery life of UE 115-a or UE 115-b, or both. In some examples, UE 115-a or UE 115-b, or both, can be configured to support sidelink operations that provide higher reliability and lower latency for sidelink communication of the sidelink connection 205 between UE 115-a and UE 115-b. For example, UE 115-a or UE 115-b, or both, can be configured to support discontinuous transmission (DTX) operations or discontinuous reception (DRX) operations, or both, for sidelink communication of the sidelink connection 205.

[0183] The sidelink connection 205 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UEs 115). The sidelink communication channel can correspond to the PC5 interface between UE 115-a and UE 115-b. The PC5 interface can facilitate direct communication between at least two UEs without involving network infrastructure (e.g., base stations (e.g., eNBs, next-generation B nodes, or gigabit B nodes (any of which can be referred to as gNBs)), etc.). The PC5 interface can also be a one-to-many communication interface (i.e., can be designated for group communication).

[0184] In some examples, UE 115-a and UE 115-b may execute a connection procedure (e.g., a sidelink connection procedure) to establish a sidelink connection 205. For example, UE 115-a and UE 115-b may execute a sidelink connection setup procedure to establish a sidelink connection 205. As part of the sidelink connection procedure, UE 115-a may determine a DTX configuration 210 for the sidelink connection 205, and the DTX configuration 210 may be exclusively used for (e.g., dedicated to) the sidelink connection 205. In some other examples, UE 115-a may determine the DTX configuration 210 prior to the sidelink connection procedure. The DTX configuration 210 may indicate a pattern of one or more DTX cycles, which may include a timing offset (e.g., a slot offset, a frame offset), the periodicity of the one or more DTX cycles, an active DTX duration, or an inactive DTX duration, or any combination thereof.

[0185] In some examples, UE 115-a may determine one or more of the following, at least in part, based on expected data traffic (e.g., traffic load) on the sidelink connection 205: a timing offset (e.g., a slot offset, a frame offset), the periodicity of the one or more DTX cycles, an active DTX duration, or an inactive DTX duration, or any combination thereof. For example, UE 115-a may determine one or more of the following, at least in part, based on a DRB configuration including a mapping and a quasi co-location indicator (PQI): a timing offset (e.g., a slot offset, a frame offset), the periodicity of the one or more DTX cycles, an active DTX duration, or an inactive DTX duration, or any combination thereof. As part of the sidelink connection procedure, UE 115-a may provide the DTX configuration 210 to UE 115-b. In some examples, the sidelink connection setup procedure may be an RRC sidelink connection setup procedure, and UE 115-a may provide the DTX configuration 210 in an RRC configuration message.

[0186] As part of the sidelink connection procedure, UE 115-b may receive a DTX configuration 210 from UE 115-a. In some examples, UE 115-b may determine a DRX configuration 215 for the sidelink connection 205, at least in part, based on the DTX configuration 210. The DRX configuration 215 may be exclusively used for the sidelink connection 205. In some examples, the DRX configuration 215 may indicate a pattern of one or more DRX cycles, which may include a timing offset (e.g., a slot offset, a frame offset), a periodicity of the one or more DRX cycles, an active DRX duration, or an inactive DRX duration, or any combination thereof. As such, UE 115-b (e.g., the receiving UE) may derive one or more DRX cycles based on the DTX configuration 210 from UE 115-a (e.g., the transmitting UE). As part of the sidelink connection procedure, UE 115-b may provide the DRX configuration 215 to UE 115-a. In some examples, the sidelink connection setup procedure may be an RRC sidelink connection setup procedure, and UE 115-b may provide the DRX configuration 215 in an RRC configuration message.

[0187] The DTX configuration 210 and the DRX configuration 215 are thus separate. Additionally, the DTX configuration 210 and the DRX configuration 215 are dedicated to a given sidelink connection (such as the sidelink connection 205). That is, a UE participating in multiple sidelink connections with multiple UEs (also referred to as peer UEs) may have separate DTX and DRX configurations (e.g., a separate DTX configuration and a separate DRX configuration) dedicated to each sidelink connection that the UE has with each of the multiple UEs among the multiple UEs.

[0188] By supporting the DTX configuration 210 or the DRX configuration 215 or one or more of both configurations for sidelink communication associated with the sidelink connection 205, UE 115-a and UE 115-b may experience power savings and other benefits. In Figure 2 an example, the sidelink connection procedure may be a unicast RRC sidelink connection setup procedure. As such, the exchange of the DTX configuration 210 and the DRX configuration 215 may be performed via unicast communication. Examples of exchanging the DTX configuration 210 and the DRX configuration 215 via other communications (e.g., such as multicast communication and broadcast communication) are described with reference to Figure 3 and 4 are described.

[0189] Figure 3An example of a wireless communication system 300 in accordance with one or more aspects of the present disclosure is described. In some examples, the wireless communication system 300 may implement aspects of the wireless communication systems 100 and 200. For example, the wireless communication system 300 may support multiple radio access technologies, including 4G systems (such as LTE systems, LTE-A systems, or LTE-A Pro systems), and 5G systems (which may be referred to as NR systems). The wireless communication system 300 may also support sidelink communication between multiple UEs 115 (such as between UEs 115-a, 115-b, and 115-c, which may be examples of corresponding devices referred to Figure 1 and 2 ). Examples of sidelink communication may include D2D communication, V2X communication systems, V2V communication systems, and the like. The wireless communication system 300 may also support reduced power consumption, and in some examples, may facilitate higher reliability and lower latency sidelink communication and other benefits.

[0190] In Figure 3 the example, UEs 115-a, 115-b, and 115-c may support multicast communication for a sidelink connection 205 (which may be a sidelink communication channel). For example, the sidelink communication channel may correspond to the PC5 interface between UE 115-a and UE 115-b, or between UE 115-a and UE 115-c. The PC5 interface may enable direct communication between at least two UEs without involving network infrastructure (such as a base station (e.g., an eNB, a next-generation B node, or a gigabit B node (any of which may be referred to as a gNB)), etc.). The PC5 interface may also be a one-to-many communication interface (i.e., may be designated for group communication). For example, UEs 115-a, 115-b, and 115-c may be part of a group 305.

[0191] UE 115-a may use the sidelink connection 205 to transmit a DTX configuration 210 to the group 305 via multicast communication. Similarly, one or more of UEs 115-a, 115-b, and 115-c may use the sidelink connection 205 to transmit a corresponding DRX configuration to the group 305 via multicast communication. In Figure 3In the example, the DTX configuration 210 can be shared for the group 305 (e.g., UE 115-b and UE 115-c). In other words, the DTX configuration 210 can be the same for the group 305 (e.g., UE 115-b and UE 115-c), while each UE (e.g., UE 115-b and UE 115-c) may have different unicast traffic on the corresponding sidelink connection 205 in some examples. Additionally, the DRX configuration can still be dedicated to a given sidelink connection (such as each sidelink connection 205). In other words, even if the DTX configuration 210 is shared for all UEs in the group 305, a UE participating in multiple sidelink connections with multiple UEs (also referred to as peer UEs) may have a separate DRX configuration (e.g., a separate DRX configuration) dedicated to each sidelink connection that the UE has with each of the multiple UEs among the multiple UEs.

[0192] Figure 4 Illustrates an example of a wireless communication system 400 in accordance with one or more aspects of the present disclosure. In some examples, the wireless communication system 400 may implement aspects of the wireless communication systems 100 to 300. For example, the wireless communication system 400 may support multiple radio access technologies, including 4G systems (such as LTE systems, LTE-A systems, or LTE-A Pro systems), and 5G systems (which may be referred to as NR systems). The wireless communication system 400 may also support sidelink communication between multiple UEs 115 (such as UE 115-a, UE 115-b, UE 115-c, and UE 115-d, which may be examples of the corresponding devices described with reference to Figures 1 to 3 ). Examples of sidelink communication may include D2D communication, V2X communication systems, V2V communication systems, and the like. The wireless communication system 400 may also support reduced power consumption, and in some examples, may facilitate higher reliability and lower latency sidelink communication and other benefits.

[0193] In Figure 4 the example, UE 115-a, UE 115-b, UE 115-c, and UE 115-d may support broadcast communication for a sidelink connection (which may be a sidelink communication channel). For example, the sidelink communication channel may correspond to the PC5 interface between UE 115-a, UE 115-b, UE 115-c, and UE 115-d. The PC5 interface may enable direct communication between at least two UEs without involving network infrastructure (such as a base station (e.g., an eNB, a next-generation B node, or a gigabit B node (any of which may be referred to as a gNB)), etc.). The PC5 interface may also be a one-to-many communication interface (i.e., may be designated for group communication).

[0194] UE 115-a may broadcast the DTX configuration 210 to UE 115-b, UE 115-c, and UE 115-d. Similarly, one or more of UE 115-b, UE 115-c, and UE 115-d may broadcast corresponding DRX configurations 215. In Figure 4 the example, the DTX configuration 210 may be common for all 115 (e.g., UE 115-b, UE 115-c, and UE 115-d). That is, the DTX configuration 210 may be the same for all UEs 115 (e.g., UE 115-b, UE 115-c, and UE 115-d), while each UE 115 (e.g., UE 115-b, UE 115-c, and UE 115-d) may have different unicast traffic on the corresponding sidelink connection 205 in some examples. Additionally, the DRX configuration 215 may still be dedicated to a given sidelink connection (such as each sidelink connection). In other words, even if the DTX configuration 210 is common for all UEs 115, a UE 115 participating in multiple sidelink connections with multiple UEs 115 (also referred to as peer UEs) may have a separate DRX configuration 215 (e.g., a separate DRX configuration 215) dedicated to each sidelink connection that the UE has with each of the multiple UEs 115 among the multiple UEs 115.

[0195] Thus, UE 115-a, UE 115-b, UE 115-c, and UE 115-d may be part of multiple sidelink connections. As such, the DTX configuration 210 and the DRX configuration 215 may thus be sidelink-dependent. That is, the DRX configuration 215 may be exclusive for each sidelink connection (e.g., sidelink). In some examples, as described herein, determining the DTX configuration 210 or the DRX configuration 215 may be partially based on multiple active sidelink connections (e.g., active sidelinks). Each UE 115 may provide the DRX configuration 215 to all of its peer UEs partially based on determining the corresponding DRX configuration 215, and each UE 115 may also receive the DRX configuration 215 from all of its peer UEs.

[0196] Returning to Figure 2 , in some examples, UE 115-b may receive multiple DTX configurations 210 from multiple UEs 115 (including UE 115-a). For example, referring to Figure 3 and 4, UE 115-b may receive DTX configuration 210 from UE 115-a, UE 115-c, or UE 115-c, or a combination thereof. UE 115-b may receive multiple DTX configurations 210 (e.g., a set of DTX configurations 210) via unicast communication, multicast communication, or broadcast communication, as described with reference to Figures 2 to 4 . UE 115-b may thus receive DTX configuration 210 on multiple (e.g., all) active sidelink connections.

[0197] UE 115-b (e.g., the receiving UE) may determine DRX configuration 215 (e.g., the pattern of one or more DRX cycles) based on the received set of DTX configurations 210. In other words, UE 115-b may determine DRX configuration 215 based on multiple DTX configurations 210 received on multiple sidelink connections. In some examples, when UE 115-b (e.g., the receiving UE) receives multiple DTX configurations 210 from multiple UEs 115 (e.g., UE 115-a, UE 115-c, or UE 115-c or a combination thereof), UE 115-b may determine DRX configuration 215 based in part on a union operation (also simply referred to as a union) of the received multiple DTX configurations 210. For example, UE 115-b may identify all DTX cycles associated with the received multiple DTX configurations 210 and determine DRX configuration 215 based in part on all the identified DTX cycles associated with the received multiple DTX configurations 210. In some examples, UE 115-b may identify the DTX cycles associated with the received multiple DTX configurations 210 and determine the DTX cycles that are common for the received multiple DTX configurations 210. Based on the determined common DTX cycles, UE 115-b may determine DRX configuration 215.

[0198] In some examples, UE 115-b may determine or generate a DRX configuration 215 based, in part, on performing a union operation (e.g., a union) on a subset of DTX configurations 210 associated with a received set of DTX configurations 210. In some examples, UE 115-b may determine a receiver spatial configuration 420 (Rx spatial configuration). UE 115-b may select a subset of DTX configurations 210 associated with the received set of DTX configurations 210 based, in part, on the receiver spatial configuration 420. The subset of DTX configurations 210 may thus correspond to sidelink connections associated with the same receive directional beam of UE 115-b. That is, the subset of DTX configurations 210 includes all sidelink connections that can be received using the same receiver directional beam, which is intended for a corresponding sidelink connection between UE 115-b and a peer UE (e.g., UE 115-a, UE 115-c, or UE 115-d, or any combination thereof).

[0199] As an example, referring to Figure 4 , UE 115-b may determine a DRX configuration 215 for a sidelink connection between UE 115-b and UE 115-d. The sidelink connection between UE 115-b and UE 115-d may correspond to a first receive directional beam 405 to receive a DTX configuration 210 or other various communication content (e.g., data) from UE 115-d. Additionally, for a different sidelink connection between UE 115-b and UE 115-a, UE 115-b may use a second receive directional beam 410 to receive a DTX configuration 210 or other various communication content (e.g., data) from UE 115-a. Similarly, for another sidelink connection between UE 115-b and UE 115-c, UE 115-b may use a third receive directional beam 415 to receive a DTX configuration 210 or other various communication content (e.g., data) from UE 115-c. UE 115-b may still use the second receive directional beam 410 to receive from UE 115-d to receive a DTX configuration 210 or other various communication content (e.g., data) from UE 115-d, but if UE 115-b uses the third receive directional beam 415, it cannot receive from UE 115-d (e.g., the quality may be less than the minimum QoS). Thus, UE 115-b may determine a DRX configuration 215 for the sidelink connection between UE 115-b and UE 115-d based, in part, on the union of DTX configurations 210 from UE 115-b, UE 115-d (rather than the DTX configuration from UE 115-c).

[0200] The DRX configuration 215 determined by UE 115-b can be based in part on one or more DRX cycles (e.g., a set of DRX patterns) with different criteria. In some examples, the DRX configuration 215 determined by UE 115-b can be based in part on a different peak QoS metric associated with the corresponding DTX configuration 210 in one or more received DTX configurations 210. In some other examples, the DRX configuration 215 determined by UE 115-b can be based in part on a different traffic throughput associated with the corresponding DTX configuration 210 in the one or more received DTX configurations 210. In other examples, the DRX configuration 215 determined by UE 115-b can be based in part on a different spectral efficiency associated with the corresponding DTX configuration 210 in the one or more received DTX configurations 210. In some examples, the DRX configuration 215 determined by UE 115-b can be based in part on a different RSRP associated with the corresponding DTX configuration 210 in the one or more received DTX configurations 210. In other examples, the DRX configuration 215 determined by UE 115-b can be based in part on a different RSRQ associated with the corresponding DTX configuration 210 in the one or more received DTX configurations 210. The DRX configuration 215 determined by UE 115-b can thus be based in part on one or more DRX cycles (e.g., a set of DRX patterns) with different criteria (e.g., such as different peak QoS, throughput, spectral efficiency, RSRP, or RSRQ, or any combination thereof).

[0201] UE 115-b (e.g., the receiving UE) may transmit a request message (e.g., an offset alignment request message) to a peer UE 115 (e.g., UE 115-a, UE 115-c, or UE 115-d, or any combination thereof), the request message including a request to adjust a parameter of the DTX configuration 210 associated with the peer UE 115. The parameter may be a DTX period, a DTX active duration, a DTX timing offset, or any combination thereof. For example, UE 115-b may request the peer UE 115 (e.g., UE 115-a, UE 115-c, or UE 115-d, or any combination thereof) to change the DTX timing offset to reduce the DRX active duration associated with UE 115-b, thereby providing increased power savings for UE 115-b. The peer UE 115 (e.g., UE 115-a, UE 115-c, or UE 115-d, or any combination thereof) may transmit, and UE 115-b may receive, a response message (e.g., an offset alignment response message) related to the request to adjust a parameter of the DTX configuration 210 associated with the peer UE 115. The response message may indicate one or more of the following: an adjusted DTX period, an adjusted DTX active duration, or an adjusted DTX timing offset, or any combination thereof.

[0202] In the above example, the response message may indicate the new DTX timing offset. In some other examples, the response message may indicate the reason for rejecting the request to adjust the parameter associated with the DTX configuration 210. For example, the peer UE 115 (UE 115-a, UE 115-c, or UE 115-d, or any combination thereof) may indicate that it cannot change the DTX timing offset due to time-sensitive data. As a result, UE 115-b may transmit a request message including a request to adjust a parameter of the DTX configuration 210 associated with another peer UE 115 with which UE 115-b has an active sidelink connection. For example, UE 115-b may request the peer UE 115 (e.g., UE 115-a, UE 115-c, or UE 115-d, or any combination thereof) to change the DTX timing offset to reduce the DRX active duration associated with UE 115-b, thereby providing increased power savings for UE 115-b.

[0203] Referring to Figures 2 to 4 , UE 115-a (e.g., the transmitting UE) may transmit (e.g., signal) for all its active sidelink connections (including the sidelink connection 205 between UE 115-a and UE 115-b as Figure 2The DTX configuration 210 as shown in (). UE 115-a may also transmit the DTX configuration 210 for a sidelink connection (e.g., sidelink) that the UE 115-a is currently listening to (e.g., the sidelink between UE 115-a and UE 115-c, or the sidelink between UE 115-a and UE 115-d). In some examples, UE 115-a may transmit the DTX configuration 210 to a peer UE (e.g., UE 115-b, UE 115-c, or UE 115-d, or any combination thereof) at least in part based on a device identifier (e.g., peer identifier). In some examples, each peer UE may align its DTX timing at least in part based on the received DTX configuration 210. Similarly, the peer UE may determine its DTX configuration and provide the DTX configuration to UE 115-a. Thus, UE 115 may determine its DRX configuration 215 (e.g., DRX mode) at least in part based on the received DTX configuration 210 (e.g., DTX mode). UE 115 may also request that a peer UE adjust one or more parameters of the DTX configuration (e.g., DTX timing offset adjustment). The UE may also notify all peer UEs of the adjusted DRX configuration 215.

[0204] For example, one or more UEs 115 (e.g., UE 115-a, UE 115-b, UE 115-c, or UE 115-d, or any combination thereof) may support DTX and DRX reconfiguration. That is, one or more of UE 115-a, UE 115-b, UE 115-c, or UE 115-d, or any combination thereof may update the DTX mode (e.g., DTX cycle) or the DRX mode (e.g., DRX cycle) or both. In some examples, one or more of UE 115-a, UE 115-b, UE 115-c, or UE 115-d, or any combination thereof may determine to update the DTX mode (e.g., DTX cycle) or the DRX mode (e.g., DRX cycle) or both at least in part based on a trigger. The trigger may be a new sidelink connection or a new sidelink application or both. One or more of UE 115-a, UE 115-b, UE 115-c, or UE 115-d, or any combination thereof may transmit an update message to a corresponding peer UE (e.g., one or more of UE 115-a, UE 115-b, UE 115-c, or UE 115-d, or any combination thereof), the update message indicating the updated DTX mode (e.g., DTX cycle) or the updated DRX mode (e.g., DRX cycle) or both. In some examples, the update message may be transmitted at least in part based on the DRX configuration (e.g., DRX cycle) of the peer UE. In some examples, this may trigger an offset adjustment request as in the link establishment scenario described herein.

[0205] One or more UEs 115 (e.g., UE 115-a, UE 115-b, UE 115-c, or UE 115-d, or any combination thereof) may support activity-based DRX mode reconfiguration (e.g., DTX and / or DRX reconfiguration). For example, UE 115-b may identify capability information (e.g., UE capabilities), and may transmit a message including the capability information to UE 115-a. In some examples, UE 115-b may provide the capability information in an RRC connection message as part of a connection procedure such as an RRC connection procedure. UE 115-b may be configured to enable a DRX reconfiguration mode based on the capability information. In some examples, UE 115-b may provide a DTX configuration or a DRX configuration or both in the capability information. In some examples, UE 115-b may monitor one or more DRX cycles based in part on DRX configuration 215, and may activate a DRX timer based in part on the monitoring. In some examples, UE 115-b may determine that there is no data from a peer UE (e.g., UE 115-a) during the one or more DRX cycles based on the monitoring, and may thereby activate the DRX timer. In other words, if UE 115-b does not receive data on a DRX occasion (e.g., DRX cycle) corresponding to a peer UE or a set of peer UEs, UE 115-b may start a timer.

[0206] UE 115-b may adjust the mode of one or more DRX cycles associated with DRX configuration 215 based in part on the expiration of the DRX timer. For example, UE 115-b may modify the length of the one or more DRX cycles. UE 115-b may transmit an indication of the modified length of the one or more DRX cycles to a peer UE or a set of peer UEs. In other words, if no data is received from a peer UE or a set of peer UEs before the timer expires, UE 115-b may modify the DRX occasion (e.g., DRX cycle). In some examples, modifying the DRX occasion may include increasing or decreasing the length (e.g., duration) of the DRX period associated with a peer UE or a set of peer UEs. UE 115-b may notify the peer UE or the set of peer UEs of the modified DRX period in a new DRX configuration.

[0207] Thus, referring to Figures 2 to 4 , for sidelink communication, UE 115 may experience power savings due to providing a DTX configuration or a DRX configuration or both. Referring to Figures 2 to 4Certain aspects of the described subject matter can be implemented to achieve one or more of the following potential power savings and increased efficiency for sidelink communication, and so on. The techniques employed by UE 115 can provide power savings and an enhanced user experience for the operation of UE 115. For example, the operations performed by UE 115 can provide higher reliability and lower latency sidelink operations for sidelink communication. In some examples, configuring UE 115 to support a DTX configuration or a DRX configuration or both for sidelink communication can support reduced power consumption, increased spectral efficiency, and in some examples, can facilitate increased efficiency of sidelink operations and other benefits.

[0208] Figure 5 An example of a transmission timeline 500 in accordance with one or more aspects of the present disclosure is illustrated. In some examples, the transmission timeline 500 can implement aspects of the wireless communication systems 100 to 400 described respectively with reference to Figures 1 to 4 For example, the transmission timeline 500 can be based on a configuration by UE 115 and implemented by UE 115. The transmission timeline 500 can be applicable to implementations or instances when UE 115 is configured for sidelink communication such as sidelink communication in V2X and V2V communication systems. In some examples, the transmission timeline 500 can be applicable to implementations or instances when UE 115 is configured with a DRX configuration for sidelink communication such as sidelink communication in V2X and V2V communication systems.

[0209] In Figure 5 the example illustrated, the transmission timeline 500 can include sidelink communication between UE 115-a and UE 115-b, where UE 115-a and UE 115-b can be with reference to Figures 1 to 4Examples of corresponding devices described. Sidelink communication between UE 115-a and UE 115-b can be an example of unicast communication including a single sidelink connection for these two UEs 115 (e.g., UE 115-a and UE 115-b). UE 115-a or UE 115-b or both can carry sidelink communication (e.g., in FDD mode) or can be configured to carry sidelink communication (e.g., in TDD mode). Transmission timeline 500 can include a DTX timeline 505 associated with UE 115-a. DTX timeline 505 can include one or more DTX active durations 510 (also referred to as DTX on durations). DTX active duration 510 can correspond to time resources (e.g., symbols, mini-slots, slots, sub-frames, frames) and frequency resources (e.g., sub-carriers, carriers). Transmission timeline 500 can include a DTX timeline 515 associated with UE 115-b. DTX timeline 515 can include one or more DTX active durations 520, and one or more DTX inactive durations 525 (where UE 115-b operates in a low power mode). DTX active duration 520 and DTX inactive duration 525 can correspond to time resources (e.g., symbols, mini-slots, slots, sub-frames, frames) and frequency resources (e.g., sub-carriers, carriers).

[0210] Transmission timeline 500 can include a DRX timeline 530 associated with UE 115-a. DRX timeline 530 can include one or more DRX active durations 535 (also referred to as DRX on durations). DRX active duration 535 can correspond to time resources (e.g., symbols, mini-slots, slots, sub-frames, frames) and frequency resources (e.g., sub-carriers, carriers). Transmission timeline 500 can include a DRX timeline 540 associated with UE 115-b. DRX timeline 540 can include one or more DRX active durations 545, and one or more DRX inactive durations 550 (where UE 115-b operates in a low power mode). DRX active duration 545 and DRX inactive duration 550 can correspond to time resources (e.g., symbols, mini-slots, slots, sub-frames, frames) and frequency resources (e.g., sub-carriers, carriers).

[0211] In some examples, UEs 115-a and 115-b may transmit or receive various communication contents (e.g., control information, data) in an asymmetric manner. In other words, the traffic associated with UEs 115-a and 115-b may be asymmetric in the context of DTX timelines 505, 515 or DRX timelines 530, 540, or both. For example, UE 115-a may generate and transmit information (e.g., packets) every 320 ms, while UE 115-b may generate and transmit information (e.g., packets) every 64 ms. In some examples, UE 115-a or UE 115-b or both may be configured to operate in a power-saving mode, such as half-duplex communication (e.g., a mode that supports one-way communication via transmission or reception but not simultaneous transmission and reception). For example, UE 115-a or UE 115-b or both may be configured (or scheduled) to have a time-division duplex (TDD) configuration. In some examples, UE 115-a or UE 115-b or both may be configured (e.g., scheduled) to have a TDD configuration to manage half-duplex communication between UE 115-a and UE 115-b. The sidelink communication between UE 115-a and UE 115-b can thus be partitioned in the time domain. In other words, at a given moment, UE 115-a or UE 115-b may transmit or receive information (e.g., packets) over the connection (e.g., sidelink) between UE 115-a and UE 115-b.

[0212] UE 115-a or UE 115-b or both may determine the DRX configuration associated with DRX timelines 530, 540, at least in part, based on the DTX configuration. For example, the DTX configuration associated with UE 115-a and used for the connection between UE 115-a and UE 115-b may derive the DRX configuration at the peer UE (e.g., UE 115-b). Similarly, the DTX configuration associated with UE 115-b and used for the connection between UE 115-a and UE 115-b may derive the DRX configuration at the peer UE (e.g., UE 115-a). As an example, and as referred to Figures 2 to 4As described, UE 115-a and UE 115-b may perform a connection procedure (e.g., an RRC connection establishment procedure) to establish or improve the connection (e.g., a sidelink connection) between UE 115-a and UE 115-b. During the connection procedure, UE 115-a may provide a DTX configuration that may indicate a DTX mode (e.g., a DTX cycle) of 320 ms. Additionally or alternatively, the DTX configuration may indicate one or more of the following: DTX timing offset, DTX active duration, or DTX inactive duration, or any combination thereof. Similarly, during the connection procedure, UE 115-b may provide a DTX configuration that may indicate a DTX mode (e.g., a DTX cycle) of 64 ms. Additionally or alternatively, the DTX configuration may indicate one or more of the following: DTX timing offset, DTX active duration, or DTX inactive duration, or any combination thereof.

[0213] Based on the exchange of DTX configurations, UE 115-a and UE 115-b may negotiate (e.g., determine) the DTX timing offset. In Figure 5 the example of, the DRX configuration determination may be based on the DTX configuration of the peer UE (e.g., UE 115-a or UE 115-b). That is, the DRX configuration of UE115-a may be based on the DTX configuration of UE 115-b (e.g., DRX configuration of UE 115-a = DTX configuration of UE 115-b). Similarly, the DRX configuration of UE 115-b may be based on the DTX configuration of UE 115-a (e.g., DRX configuration of UE 115-b = DTX configuration of UE 115-a). Thus, the DTX configuration for the connection (e.g., sidelink) derives the DRX configuration at the peer UE.

[0214] Figure 6 An example of a transmission timeline 600 in accordance with one or more aspects of the present disclosure is illustrated. In some examples, the transmission timeline 600 may implement aspects of the wireless communication systems 100 to 400 described with reference to Figures 1 to 4 respectively. For example, the transmission timeline 600 may be based on a configuration performed by UE 115 and implemented by UE 115. The transmission timeline 600 may be applicable to implementations or instances when UE 115 is configured for sidelink communication such as sidelink communication in V2X and V2V communication systems. In some examples, the transmission timeline 600 may be applicable to implementations or instances when UE 115 is configured with a DRX configuration for sidelink communication such as sidelink communication in V2X and V2V communication systems.

[0215] In Figure 6In the example illustrated, the transmission timeline 600 may include sidelink communication between UE 115-a and UE 115-b, and the UE 115-a and UE 115-b may be examples of corresponding devices described with reference to Figures 1 to 4 Additionally, the transmission timeline 600 may include sidelink communication between UE 115-a and UE 115-c, and the UE 115-a and UE 115-c may be examples of corresponding devices described with reference to Figures 1 to 4 The sidelink communication between UE 115-a and UE 115-b may be an example of unicast communication. That is, the sidelink connection may be a unicast connection between UE 115-a and UE 115-b. Similarly, the sidelink communication between UE 115-a and UE 115-c may be an example of unicast communication and may be another unicast connection between UE 115-a and UE 115-c. Thus, UE 115-a may communicate with multiple UEs (e.g., UE 115-b and UE 115-c) on multiple unicast connections (e.g., unicast links). One or more of UE 115-a, UE 115-b, and UE 115-c may carry sidelink communication (e.g., in FDD mode) or may be configured to carry sidelink communication (e.g., in TDD mode).

[0216] The transmission timeline 600 may include a DTX timeline 605 associated with UE 115-a. The DTX timeline 605 may correspond to a sidelink connection (e.g., unicast connection) between UE 115-a and UE 115-b. The DTX timeline 605 may include one or more DTX active durations 610 (also referred to as DTX on durations), which may be part of a DTX occasion 615 (also referred to as a DTX cycle). The DTX active duration 610 may correspond to time resources (e.g., symbols, mini-slots, slots, sub-frames, frames) and frequency resources (e.g., sub-carriers, carriers). The transmission timeline 600 may include a DTX timeline 620 associated with UE 115-a. The DTX timeline 620 may correspond to a sidelink connection (e.g., unicast connection) between UE 115-a and UE 115-c. The DTX timeline 620 may include one or more DTX active durations 625, which may be part of a DTX occasion 630 (also referred to as a DTX cycle). The DTX active duration 625 may correspond to time resources (e.g., symbols, mini-slots, slots, sub-frames, frames) and frequency resources (e.g., sub-carriers, carriers).

[0217] The transmission timeline 600 may include a DTX timeline 635 associated with UE 115-b. The DTX timeline 635 may correspond to a sidelink connection (e.g., a unicast connection) between UE 115-b and UE 115-a. The DTX timeline 635 may include one or more DTX active durations 640 (also referred to as DTX on durations). The DTX active duration 640 may correspond to time resources (e.g., symbols, mini-slots, slots, sub-frames, frames) and frequency resources (e.g., sub-carriers, carriers). The transmission timeline 600 may include a DTX timeline 645 associated with UE 115-c. The DTX timeline 645 may correspond to a sidelink connection (e.g., a unicast connection) between UE 115-c and UE 115-a. The DTX timeline 645 may include one or more DTX active durations 650. The DTX active duration 650 may correspond to time resources (e.g., symbols, mini-slots, slots, sub-frames, frames) and frequency resources (e.g., sub-carriers, carriers). The transmission timeline 600 may include a DRX timeline 655 associated with UE 115-a. The DRX timeline 655 may correspond to a sidelink connection (e.g., a unicast connection) between UE 115-a and UE 115-b, or a sidelink connection (e.g., a unicast connection) between UE 115-a and UE 115-c, or both. The DRX timeline 655 may include one or more DRX active durations 660 (also referred to as DTX on durations).

[0218] In some examples, the DRX timeline 655 may be based in part on the DTX timeline 635 and the DTX timeline 645. For example, as described herein, UE 115-a may determine the DRX timeline 655 (e.g., the DRX configuration) based in part on, for example, the union of the DTX configuration associated with the DTX timeline 635 (associated with UE 115-b) and the DTX configuration associated with the DTX timeline 645 (associated with UE 115-c). Similarly, as described herein, UE 115-b may determine the DRX timeline (e.g., the DRX configuration) based in part on, for example, the union of the DTX configuration associated with the DTX timeline 605 (associated with UE 115-a) and the DTX configuration associated with the DTX timeline 645 (associated with UE 115-c). Additionally, as described herein, UE 115-c may determine the DRX timeline (e.g., the DRX configuration) based in part on, for example, the union of the DTX configuration associated with the DTX timeline 605 (associated with UE 115-a) and the DTX configuration associated with the DTX timeline 635 (associated with UE 115-b).

[0219] By supporting multiple sidelink connections, UE 115-a can transmit information (e.g., packets) to a peer UE based on the DTX configuration of the peer UE (such as UE 115-b or UE 115-c). For example, UE 115-a can generate information (e.g., packets) every 320 ms (with a 10-ms DTX active duration (e.g., on duration)) and transmit it to UE 115-b. UE 115-c can also generate information (e.g., packets) every 64 ms (with a 5-ms DTX active duration (e.g., on duration)) and transmit it to UE 115-c. UE 115-a can thus have a DTX configuration for each sidelink connection based on the traffic load it has for each specific sidelink connection. In some examples, UE 115-a can have an aggregated DRX configuration (e.g., as illustrated by DRX timeline 655). Since UE 115-a has multiple sidelink connections, UE 115-a wakes up at different times to participate in those sidelinks (e.g., transmit or receive information). In some examples, knowledge of the DRX of the peer enables UE 115-a to reach its peer outside of the period indicated by DTX, e.g., due to new traffic, bursty traffic, traffic based on radio resource management (RRM)-related events, etc. In Figure 6 examples, the DTX and DRX configurations for different sidelink connections can be different. The DRX configuration can also be derived in part based on the aggregated DTX configuration over all active links (e.g., active sidelink connections).

[0220] Figure 7 FIG. 700 is a block diagram of a device 705 in accordance with one or more aspects of the present disclosure. Device 705 can be an example of aspects of UE 115 as described herein. Device 705 can include a receiver 710, a communication manager 715, and a transmitter 720. Device 705 can also include a processor. Each of these components can be in communication with one another (e.g., via one or more buses).

[0221] The receiver 710 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to DTX and DRX configurations for sidelink communication, etc.). The information can be passed to other components of device 705. The receiver 710 can be an example of aspects of transceiver 1020 described with reference to Figure 10 The receiver 710 can utilize a single antenna or an antenna array.

[0222] The communication manager 715 may receive a DTX configuration for a sidelink connection between the device 705 and a second device from the second device, determine a DRX configuration based on the DTX configuration, and transmit the DRX configuration for the sidelink connection to the second device. The communication manager 715 may also determine a DTX configuration for a sidelink connection between the device 705 and the second device, transmit the DTX configuration to the second device, and receive a DRX configuration for the sidelink connection between the device 705 and the second device from the second device based on the DTX configuration. The communication manager 715 may be an example of aspects of the communication manager 1010 described herein.

[0223] The communication manager 715 or its subcomponents may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 715 or its subcomponents may be performed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC), an FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

[0224] The communication manager 715 or its subcomponents may be physically located in various positions, including being distributed such that portions of the functions are implemented by one or more physical components in different physical locations. In some examples, in accordance with various aspects of the present disclosure, the communication manager 715 or its subcomponents may be separate and distinct components. In some examples, in accordance with various aspects of the present disclosure, the communication manager 715 or its subcomponents may be combined with one or more other hardware components, the one or more other hardware components including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof.

[0225] The transmitter 720 may transmit signals generated by other components of the device 705. In some examples, the transmitter 720 may be co-located with the receiver 710 in a transceiver component. For example, the transmitter 720 may be an example of aspects of the transceiver 1020 described with reference to Figure 10 The transmitter 720 may utilize a single antenna or an antenna array.

[0226] Figure 8 A block diagram 800 of a device 805 in accordance with one or more aspects of the present disclosure is shown. The device 805 may be an example of aspects of the device 705 or the UE 115 described herein. The device 805 may include a receiver 810, a communication manager 815, and a transmitter 830. The device 805 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0227] The receiver 810 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to DTX and DRX configurations for sidelink communication, etc.). The information can be passed to other components of the device 805. The receiver 810 can be an example of aspects of the transceiver 1020 described with reference to Figure 10 The receiver 810 can utilize a single antenna or an antenna array.

[0228] The communication manager 815 can be an example of aspects of the communication manager 715 described herein. The communication manager 815 can include a transmission configuration 820 and a reception configuration 825. The communication manager 815 can be an example of aspects of the communication manager 1010 described herein.

[0229] The transmission configuration 820 can receive a DTX configuration for a sidelink connection between the device 805 and the second device from the second device. The reception configuration 825 can determine a DRX configuration based on the DTX configuration and transmit the DRX configuration for the sidelink connection to the second device. The transmission configuration 820 can determine a DTX configuration for a sidelink connection between the device 805 and the second device. The reception configuration 825 can transmit the DTX configuration to the second device and receive a DRX configuration for the sidelink connection between the device 805 and the second device from the second device based on the DTX configuration.

[0230] The transmitter 830 can transmit signals generated by other components of the device 805. In some examples, the transmitter 830 can be co-located with the receiver 810 in a transceiver component. For example, the transmitter 830 can be an example of aspects of the transceiver 1020 described with reference to Figure 10 The transmitter 830 can utilize a single antenna or an antenna array.

[0231] Figure 9 A block diagram 900 of a communication manager 905 is shown in accordance with one or more aspects of the present disclosure. The communication manager 905 can be an example of aspects of the communication manager 715, the communication manager 815, or the communication manager 1010 described herein. The communication manager 905 can include a transmission configuration 910, a reception configuration 915, an adjustment component 920, a capability component 925, and a parameter component 930. Each of these components can communicate directly or indirectly with each other (e.g., via one or more buses).

[0232] The transmission configuration 910 may receive a DTX configuration for a sidelink connection between the first device and the second device from the second device. In some examples, the transmission configuration 910 may determine a DTX configuration for a sidelink connection between the first device and the second device. In some examples, the transmission configuration 910 may receive a second DTX configuration for a sidelink connection between the first device and a third device from the third device. In some examples, the transmission configuration 910 may determine the union of the DTX configuration for the sidelink connection between the first device and the second device and the second DTX configuration for the second sidelink connection between the first device and the third device, wherein determining the DRX configuration is based on the union, and the DRX configuration includes a pattern of one or more DRX cycles associated with the sidelink connection between the first device and the second device or the second sidelink connection between the first device and the third device.

[0233] In some examples, the transmission configuration 910 may receive a set of DTX configurations for a set of sidelink connections including the sidelink connection between the first device and the second device from a set of devices including the second device. In some examples, the transmission configuration 910 may determine a subset of sidelink connections in the set of sidelink connections corresponding to the same directional reception beam, the subset of sidelink connections including the sidelink connection between the first device and the second device, wherein determining the DRX configuration is based on the union of the DTX configuration for the sidelink connection between the first device and the second device and one or more other DTX configurations for the corresponding sidelink connections in the subset of sidelink connections, and the corresponding sidelink connections are between the first device and the corresponding other devices associated with the corresponding sidelink connections.

[0234] In some examples, the transmission configuration 910 may determine a subset of sidelink connections in the set of sidelink connections corresponding to the same directional reception beam based on a receiver spatial configuration associated with the first device. In some examples, the transmission configuration 910 may transmit the DTX configuration and the DRX configuration for the set of sidelink connections including the sidelink connection between the first device and the second device to a set of devices including the second device. In some examples, the transmission configuration 910 may transmit the DTX configuration and the DRX configuration for the set of sidelink connections including the sidelink connection between the first device and the second device to the set of devices based on corresponding device identifiers associated with each device in the set of devices including the second device.

[0235] In some examples, transmission configuration 910 may receive a DTX configuration based on a sidelink connection procedure. In some examples, transmission configuration 910 may receive a DTX configuration in an RRC configuration message during a unicast RRC sidelink connection setup procedure. In some examples, transmission configuration 910 may receive a DTX configuration for a sidelink connection based on a broadcast connection associated with a second device. In some examples, transmission configuration 910 may receive a DTX configuration for a sidelink connection based on a multicast connection associated with a second device.

[0236] In some examples, transmission configuration 910 may transmit a DTX configuration based on a sidelink connection procedure. In some examples, transmission configuration 910 may transmit a DTX configuration in an RRC configuration message during a unicast RRC sidelink connection setup procedure. In some examples, transmission configuration 910 may broadcast a DTX configuration to a set of devices based on a broadcast connection associated with the set of devices including a second device. In some examples, transmission configuration 910 may transmit a DTX configuration to a set of devices based on a multicast connection associated with the set of devices including a second device.

[0237] In some cases, the DTX configuration is exclusively used for sidelink connections. In some cases, the DRX configuration includes a pattern of one or more DRX cycles, where each DRX cycle in the pattern corresponds to a different peak QoS metric of a corresponding DTX configuration among one or more other DTX configurations. In some cases, the DRX configuration includes a pattern of one or more DRX cycles, where each DRX cycle in the pattern corresponds to a different traffic throughput metric of a corresponding DTX configuration among one or more other DTX configurations. In some cases, the DRX configuration includes a pattern of one or more DRX cycles, where each DRX cycle in the pattern corresponds to a different spectral efficiency metric of a corresponding DTX configuration among one or more other DTX configurations. In some cases, the DRX configuration includes a pattern of one or more DRX cycles, where each DRX cycle in the pattern corresponds to a different RSRP metric of a corresponding DTX configuration among one or more other DTX configurations. In some cases, the DRX configuration includes a pattern of one or more DRX cycles, where each DRX cycle in the pattern corresponds to a different RSRQ metric of a corresponding DTX configuration among one or more other DTX configurations.

[0238] In some cases, the sidelink connection procedure includes a sidelink connection establishment procedure. In some cases, the sidelink connection establishment procedure includes a unicast RRC sidelink connection establishment procedure. In some cases, the DTX configuration includes a pattern of one or more DTX cycles. In some cases, the DTX configuration including the pattern of one or more DTX cycles includes a slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for transmitting sidelink communication on the sidelink connection. In some cases, the wireless communication includes sidelink communication. In some cases, the sidelink communication includes V2X communication.

[0239] In some cases, the DTX configuration is common for all sidelink connections associated with a broadcast connection associated with a second device, where the DTX configuration is common for at least the sidelink connection between a first device and the second device and the second sidelink connection between a third device and the second device. In some cases, one or more DTX configurations vary based on the unicast traffic load associated with one or more sidelink connections associated with a broadcast connection associated with a second device. In some cases, the DTX configuration is common for all sidelink connections associated with a multicast connection associated with a second device, where the DTX configuration is common for at least the sidelink connection between a first device and the second device and the second sidelink connection between a third device and the second device. In some cases, one or more DTX configurations vary based on the unicast traffic load associated with one or more sidelink connections associated with a multicast connection associated with a second device.

[0240] In some cases, the DTX configuration is exclusively used for sidelink connections. In some cases, the sidelink connection procedure includes a sidelink connection establishment procedure. In some cases, the sidelink connection establishment procedure includes a unicast RRC sidelink connection establishment procedure. In some cases, the DTX configuration includes a pattern of one or more DTX cycles. In some cases, the DTX configuration including the pattern of one or more DTX cycles includes a slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for transmitting sidelink communication on the sidelink connection. In some cases, the DTX configuration includes a DTX period, a DTX active duration, or a DTX offset, or any combination thereof. In some cases, one or more of the DTX period, the DTX active duration, or the DTX offset is based on the traffic load associated with the sidelink connection. In some cases, one or more of the DTX period, the DTX active duration, or the DTX offset is based on the DRB configuration associated with the sidelink connection.

[0241] In some cases, wireless communication includes sidelink communication. In some cases, sidelink communication includes V2X communication. In some cases, the DTX configuration is common for all sidelink connections associated with a broadcast connection associated with a set of devices. In some cases, the DTX configuration is common for at least a sidelink connection between a first device and a second device and a second sidelink connection between a third device and the first device. In some cases, one or more DTX configurations vary on one or more sidelink connections associated with a broadcast connection associated with a set of devices based on the unicast traffic load associated with the one or more sidelink connections. In some cases, the DTX configuration is common for all sidelink connections associated with a multicast connection, where the DTX configuration is common for at least a sidelink connection between a first device and a second device and a second sidelink connection between a third device and the first device. In some cases, one or more DTX configurations vary on one or more sidelink connections associated with a multicast connection associated with a set of devices based on the unicast traffic load associated with the one or more sidelink connections.

[0242] The receive configuration 915 may determine the DRX configuration based on the DTX configuration. In some examples, the receive configuration 915 may convey the DRX configuration for a sidelink connection to a second device. In some examples, the receive configuration 915 may convey the DTX configuration to a second device. In some examples, the receive configuration 915 may receive, based on the DTX configuration, the DRX configuration for a sidelink connection between a first device and a second device from the second device. In some examples, the receive configuration 915 may receive a set of DRX configurations for a set of sidelink connections including a sidelink connection between a first device and a second device from a set of devices including the second device.

[0243] In some cases, the DRX configuration includes a pattern of one or more DRX cycles. In some cases, the DRX configuration including the pattern of one or more DRX cycles includes a time slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for receiving sidelink communication on a sidelink connection. In some cases, the DRX configuration includes a pattern of one or more DRX cycles. In some cases, the DRX configuration including the pattern of one or more DRX cycles includes a time slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for receiving sidelink communication on a sidelink connection.

[0244] The adjustment component 920 may transmit a request message to a second device, the request message including a request to adjust a parameter associated with the DTX configuration, where the parameter includes one or more of the following: DTX period, DTX active duration, or DTX offset, or any combination thereof, where determining the DRX configuration is based on the request to adjust the parameter associated with the DTX configuration. In some examples, the adjustment component 920 may receive a response message from the second device based on the request message, the response message being related to the request to adjust the parameter associated with the DTX configuration, where determining the DRX configuration is based on the response message. In some examples, a request message is transmitted to a third device, the request message including a request to adjust a parameter associated with a corresponding DTX configuration associated with the third device, where the parameter includes one or more of the following: DTX period, DTX active duration, or DTX offset, or any combination thereof, where determining the DRX configuration is based on the request to adjust the parameter associated with the corresponding DTX configuration associated with the third device.

[0245] In some examples, the adjustment component 920 may adjust the pattern of one or more DRX cycles based on the DTX configuration received from the second device for a sidelink connection. In some examples, the adjustment component 920 may transmit an indication of the adjusted pattern to a set of devices for each device in the set of devices to align DTX timing, where the first device has a corresponding sidelink connection with each device in the set of devices. In some examples, the adjustment component 920 may adjust the pattern of one or more DRX cycles associated with the DRX configuration based on a trigger. In some examples, the adjustment component 920 may transmit an update message to the second device based on the adjustment, the update message including an RRC update message including a DTX offset adjustment request.

[0246] In some examples, the adjustment component 920 may receive a request message from a second device, the request message including a request to adjust a parameter associated with the DTX configuration, where the parameter includes one or more of the following: DTX period, DTX active duration, or DTX offset, or any combination thereof. In some examples, the adjustment component 920 may transmit a response message to the second device based on the request message, the response message being related to the request to adjust a parameter associated with the DTX configuration. In some cases, the response message indicates one or more of an adjusted DTX period, an adjusted DTX active duration, or an adjusted DTX offset, or any combination thereof. In some cases, the response message indicates a reason for rejecting the request to adjust a parameter associated with the DTX configuration. In some cases, the trigger includes a new sidelink connection, or a new sidelink application, or both. In some cases, the response message indicates one or more of an adjusted DTX period, an adjusted DTX active duration, or an adjusted DTX offset, or any combination thereof. In some cases, the response message indicates a reason for rejecting the request to adjust a parameter associated with the DTX configuration.

[0247] The capability component 925 may identify capability information. In some examples, the capability component 925 may transmit a message including the capability information associated with the first device to the second device, the message including an RRC connection message. In some examples, the capability component 925 may enable the DRX reconfiguration mode based on the capability information. In some examples, the capability component 925 may monitor one or more DRX cycles based on the DRX configuration. In some examples, the capability component 925 may activate a DRX timer based on the monitoring.

[0248] In some examples, the capability component 925 may determine, based on the monitoring, that there is no data from the second device during the one or more DRX cycles, where activating the DRX timer is based on the absence of data from the second device during the one or more DRX cycles. In some examples, the capability component 925 may adjust the mode of one or more DRX cycles associated with the DRX configuration based on the expiration of the DRX timer. In some examples, the capability component 925 may modify the length of the one or more DRX cycles. In some examples, the capability component 925 may transmit an indication of the modified length of the one or more DRX cycles to the second device.

[0249] The parameter component 930 may identify a DTX period, a DTX active duration, or a DTX offset, or any combination thereof, based on the DTX configuration, wherein determining the DRX configuration is based on the DTX period, the DTX active duration, or the DTX offset, or any combination thereof. In some cases, one or more of the DTX period, the DTX active duration, or the DTX offset is based on the traffic load associated with the sidelink connection. In some cases, one or more of the DTX period, the DTX active duration, or the DTX offset is based on the data radio bearer configuration associated with the sidelink connection.

[0250] Figure 10 FIG. shows a diagram of a system 1000 of a device 1005 according to one or more aspects of the present disclosure. The device 1005 may be an example of or include components of the device 705, the device 805, or the UE 115 as described herein. The device 1005 may include components for two-way voice and data communication, which include components for transmitting and receiving communications, including a communication manager 1010, an I / O controller 1015, a transceiver 1020, an antenna 1025, a memory 1030, and a processor 1040. These components may be in electronic communication via one or more buses (e.g., bus 1045).

[0251] The communication manager 1010 as described herein may be implemented to achieve higher reliability and lower latency sidelink operations for sidelink communication. One implementation may allow the device 1005 to reduce power consumption when providing sidelink communication in a wireless communication system (such as a 5G system). Another implementation may allow the device 1005 to support higher reliability and low latency sidelink operations by supporting DTX configurations and DRX configurations for sidelink communication.

[0252] The communication manager 1010 may receive a DTX configuration for a sidelink connection between the device 1005 and a second device, determine a DRX configuration based on the DTX configuration, and transmit the DRX configuration for the sidelink connection to the second device. The communication manager 1010 may also determine a DTX configuration for a sidelink connection between the device 1005 and the second device, transmit the DTX configuration to the second device, and receive a DRX configuration for the sidelink connection between the device 1005 and the second device from the second device based on the DTX configuration.

[0253] The I / O controller 1015 may manage the input and output signals of the device 1005. The I / O controller 1015 may also manage peripheral devices not integrated into the device 1005. In some cases, the I / O controller 1015 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 1015 may utilize an operating system, such as or another known operating system. In other cases, the I / O controller 1015 may represent, or interact with, a modem, keyboard, mouse, touch screen, or similar device. In some cases, the I / O controller 1015 may be implemented as part of a processor. In some cases, a user may interact with the device 1005 via the I / O controller 1015 or via a hardware component controlled by the I / O controller 1015.

[0254] The transceiver 1020 may perform bi-directional communication via one or more antennas, wired or wireless links, as described herein. For example, the transceiver 1020 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1020 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna. In some cases, the device 1005 may include a single antenna 1025. However, in some cases, the device 1005 may have more than one antenna 1025, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

[0255] The memory 1030 may include RAM and ROM. The memory 1030 may store computer-readable, computer-executable code 1035 that includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 1030 may specifically contain BIOS, which may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0256] The code 1035 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communication. The code 1035 may be stored on a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, the code 1035 may not be directly executable by the processor 1040, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0257] The processor 1040 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, microcontroller, ASIC, FPGA, programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1040 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 1040. The processor 1040 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1030) to cause the device 1005 to perform various functions (e.g., functions or tasks supporting DTX and DRX configurations for sidelink communication).

[0258] Figure 11 A flowchart illustrating method 1100 according to one or more aspects of the present disclosure is shown. Operations of method 1100 may be implemented by the UE 115 or its components as described herein. For example, operations of method 1100 may be performed by a communication manager as described with reference to Figures 7 to 10 what is described. In some examples, a first device (e.g., UE 115) may execute an instruction set to control functional elements of the device to perform the functions described herein. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described herein.

[0259] At 1105, the first device may receive a DTX configuration for a sidelink connection between the first device and the second device from the second device. The operation of 1105 may be performed according to the methods described herein. In some examples, aspects of the operation of 1105 may be performed by a transmission configuration as described with reference to Figures 7 to 10 what is described.

[0260] At 1110, the first device may optionally transmit a DRX configuration for the sidelink connection to the second device, the DRX configuration being at least partially based on the DTX configuration. The operation of 1110 may be performed according to the methods described herein. In some examples, aspects of the operation of 1110 may be performed by a reception configuration as described with reference to Figures 7 to 10 what is described.

[0261] Figure 12 A flowchart illustrating method 1200 according to one or more aspects of the present disclosure is shown. Operations of method 1200 may be implemented by the UE 115 or its components as described herein. For example, operations of method 1200 may be performed by a communication manager as described with reference to Figures 7 to 10 what is described. In some examples, a device (e.g., UE 115) may execute an instruction set to control functional elements of the device to perform the functions described herein. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described herein.

[0262] At 1205, the first device may receive a DTX configuration for a sidelink connection between the first device and the second device from the second device. The operation of 1205 may be performed according to the methods described herein. In some examples, aspects of the operation of 1205 may be performed by a transmission configuration as described with reference to Figures 7 to 10 what is described.

[0263] At 1210, the first device may determine a DRX configuration based on the DTX configuration. The operation of 1210 may be performed according to the methods described herein. In some examples, aspects of the operation of 1210 may be performed by a reception configuration as described with reference to Figures 7 to 10performed according to the described reception configuration.

[0264] At 1215, the first device may optionally transmit to the second device the DRX configuration for the sidelink connection. The operation at 1215 may be performed according to the methods described herein. In some examples, aspects of the operation at 1215 may be performed by a reception configuration as referred to Figures 7 to 10 performed according to the described reception configuration.

[0265] Figure 13 A flowchart illustrating method 1300 in accordance with one or more aspects of the present disclosure is shown. The operations of method 1300 may be implemented by the UE 115 or its components as described herein. For example, the operations of method 1300 may be performed by a communication manager as referred to Figures 7 to 10 performed according to the described reception configuration. In some examples, a device (e.g., UE 115) may execute an instruction set to control functional elements of the device to perform the functions described herein. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described herein.

[0266] At 1305, the first device may receive from the second device a DTX configuration for a sidelink connection between the first device and the second device. The operation at 1305 may be performed according to the methods described herein. In some examples, aspects of the operation at 1305 may be performed by a transmission configuration as referred to Figures 7 to 10 performed according to the described transmission configuration.

[0267] At 1310, the first device may optionally receive from a third device a second DTX configuration for a sidelink connection between the first device and the third device. The operation at 1310 may be performed according to the methods described herein. In some examples, aspects of the operation at 1310 may be performed by a transmission configuration as referred to Figures 7 to 10 performed according to the described transmission configuration.

[0268] At 1315, the first device may determine the union of the DTX configuration for the sidelink connection between the first device and the second device and the second DTX configuration for the second sidelink connection between the first device and the third device. The operation at 1315 may be performed according to the methods described herein. In some examples, aspects of the operation at 1315 may be performed by a transmission configuration as referred to Figures 7 to 10 performed according to the described transmission configuration.

[0269] At 1320, the first device may determine a DRX configuration based on the union, the DRX configuration including a pattern of one or more DRX cycles associated with a sidelink connection between the first device and the second device, or a second sidelink connection between the first device and the third device, or both. The operations at 1320 may be performed according to the methods described herein. In some examples, aspects of the operations at 1320 may be performed by a transmission configuration as described with reference to Figures 7 to 10 as described.

[0270] At 1325, the first device may optionally transmit the DRX configuration for the sidelink connection to the second device. The operations at 1325 may be performed according to the methods described herein. In some examples, aspects of the operations at 1325 may be performed by a reception configuration as described with reference to Figures 7 to 10 as described.

[0271] Figure 14 FIG. 11 shows a flow chart of a method 1400 illustrating one or more aspects of the present disclosure. The operations of method 1400 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1400 may be performed by a communication manager as described with reference to Figures 7 to 10 as described. In some examples, a device (e.g., UE 115) may execute an instruction set to control functional elements of the device to perform the functions described herein. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described herein.

[0272] At 1405, the first device may receive a DTX configuration for a sidelink connection between the first device and the second device from the second device. The operations at 1405 may be performed according to the methods described herein. In some examples, aspects of the operations at 1405 may be performed by a transmission configuration as described with reference to Figures 7 to 10 as described.

[0273] At 1410, the first device may optionally receive a set of DTX configurations for a set of sidelink connections including the sidelink connection between the first device and the second device from a set of devices including the second device. The operations at 1410 may be performed according to the methods described herein. In some examples, aspects of the operations at 1410 may be performed by a transmission configuration as described with reference to Figures 7 to 10 as described.

[0274] At 1415, the first device may optionally determine a subset of sidelink connections in the set of sidelink connections corresponding to the same directional reception beam, the subset of sidelink connections including the sidelink connection between the first device and the second device. The operations at 1415 may be performed according to the methods described herein. In some examples, aspects of the operations at 1415 may be performed by a transmission configuration as described with reference toFigures 7 to 10 Execute according to the described transmission configuration.

[0275] At 1420, the first device may determine a DRX configuration based on the union of the DTX configuration for the sidelink connection between the first device and the second device and one or more other DTX configurations for the corresponding sidelink connections in a subset of sidelink connections, where the corresponding sidelink connections are between the first device and the corresponding other devices associated with the corresponding sidelink connections. The operation of 1420 may be performed according to the methods described herein. In some examples, aspects of the operation of 1420 may be performed by, such as with reference to Figures 7 to 10 the described transmission configuration.

[0276] At 1425, the first device may optionally transmit to the second device the DRX configuration for the sidelink connection. The operation of 1425 may be performed according to the methods described herein. In some examples, aspects of the operation of 1425 may be performed by, such as with reference to Figures 7 to 10 the described reception configuration.

[0277] Figure 15 FIG. 1500 is a flow chart illustrating a method 1500 according to one or more aspects of the present disclosure. The operations of method 1500 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1500 may be performed by, such as with reference to Figures 7 to 10 the described communication manager. In some examples, a device (e.g., UE 115) may execute an instruction set to control functional elements of the device to perform the functions described herein. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described herein.

[0278] At 1505, the first device may transmit to the second device a DTX configuration for the sidelink connection between the first device and the second device. The operation of 1505 may be performed according to the methods described herein. In some examples, aspects of the operation of 1505 may be performed by, such as with reference to Figures 7 to 10 the described transmission configuration.

[0279] At 1510, the first device may optionally receive from the second device a DRX configuration for the sidelink connection between the first device and the second device based on the DTX configuration. The operation of 1510 may be performed according to the methods described herein. In some examples, aspects of the operation of 1510 may be performed by, such as with reference to Figures 7 to 10 the described reception configuration.

[0280] Figure 16A flowchart illustrating method 1600 according to one or more aspects of the present disclosure is shown. Operations of method 1600 may be implemented by a UE 115 or its components as described herein. For example, operations of method 1600 may be performed by a communication manager as described with reference to Figures 7 to 10 as described. In some examples, a device (e.g., UE 115) may execute an instruction set to control functional elements of the device to perform the functions described herein. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described herein.

[0281] At 1605, a first device may determine a DTX configuration for a sidelink connection between the first device and a second device. The operation of 1605 may be performed according to the methods described herein. In some examples, aspects of the operation of 1605 may be performed by a transmission configuration as described with reference to Figures 7 to 10 as described.

[0282] At 1610, the first device may transmit the DTX configuration to the second device. The operation of 1610 may be performed according to the methods described herein. In some examples, aspects of the operation of 1610 may be performed by a reception configuration as described with reference to Figures 7 to 10 as described.

[0283] At 1615, the first device may optionally receive a DRX configuration for the sidelink connection between the first device and the second device from the second device based on the DTX configuration. The operation of 1615 may be performed according to the methods described herein. In some examples, aspects of the operation of 1615 may be performed by a reception configuration as described with reference to Figures 7 to 10 as described.

[0284] Figure 17 An example of flowchart 1700 according to one or more aspects of the present disclosure is illustrated. In some examples, flowchart 1700 may implement aspects of the wireless communication system depicted herein. In the example illustrated in Figure 17 , flowchart 1700 may include UE 115-b, UE 115-a, and UE 115-c. In some examples, flowchart 1700 may be based on a configuration performed by UE115-b, UE 115-a, or UE 115-c, or a combination thereof, and may be implemented by UE 115-a, UE 115-b, and UE115-c.

[0285] At 1705, UE 115-b may receive a discontinuous transmission configuration for a sidelink connection between UE 115-b and UE 115-a from UE 115-a, and a second discontinuous transmission configuration for a second sidelink connection between UE 115-b and UE 115-c from UE 115-c.

[0286] In 1710, UE 115-b may determine the union of a discontinuous transmission configuration for a sidelink connection between UE 115-b and UE 115-a and a second discontinuous transmission configuration for a second sidelink connection between UE 115-b and UE 115-c.

[0287] In 1715, UE 115-b may determine a discontinuous reception configuration based on the received discontinuous transmission configuration. In some cases, UE 115-b may determine the discontinuous reception configuration based on the union. In some cases, the discontinuous reception configuration may include a pattern of one or more discontinuous reception cycles associated with the sidelink connection between UE 115-b and UE 115-a, or the second sidelink connection between UE 115-b and UE 115-c, or both.

[0288] In 1720, UE 115-b may transmit the discontinuous reception configuration for the sidelink connection to UE 115-a. In some cases, the discontinuous reception configuration for the second sidelink connection may be based on the discontinuous transmission configuration received from UE 115-a and the union determined in 1710. In 1720, UE 115-b may transmit the discontinuous reception configuration for the second sidelink connection to UE 115-c. In some cases, the discontinuous reception configuration for the second sidelink connection may be based on the discontinuous transmission configuration received from UE 115-c and the union determined in 1710.

[0289] It should be noted that the methods described herein describe possible implementations, and the operations may be rearranged or otherwise modified and other implementations are possible. Additionally, aspects from two or more methods may be combined.

[0290] A first overview of aspects of the present disclosure is provided below:

[0291] Aspect 1: A method for wireless communication at a first device, comprising: receiving, from a second device, a discontinuous transmission configuration for a sidelink connection between the first device and the second device; and transmitting, to the second device, a discontinuous reception configuration for the sidelink connection, the discontinuous reception configuration being at least partially based on the discontinuous transmission configuration.

[0292] Aspect 2: The method of aspect 1, further comprising: receiving, from a third device, a second discontinuous transmission configuration for a second sidelink connection between the first device and the third device.

[0293] Aspect 3: The method as described in aspect 2 further includes: determining the union of the discontinuous transmission configuration for the sidelink connection between the first device and the second device and the second discontinuous transmission configuration for the second sidelink connection between the first device and the third device, wherein determining the discontinuous reception configuration is at least partially based on the union, and the discontinuous reception configuration includes a pattern of one or more discontinuous reception cycles associated with the sidelink connection between the first device and the second device, or the second sidelink connection between the first device and the third device, or both.

[0294] Aspect 4: The method as described in any one of aspects 1 to 3, wherein the discontinuous transmission configuration is exclusively used for the sidelink connection.

[0295] Aspect 5: The method as described in any one of aspects 1 to 4 further includes: transmitting a request message to the second device, the request message including a request to adjust a parameter associated with the discontinuous transmission configuration, wherein the parameter includes one or more of the following: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof, and wherein determining the discontinuous reception configuration is at least partially based on the request to adjust the parameter associated with the discontinuous transmission configuration.

[0296] Aspect 6: The method as described in aspect 5 further includes: receiving a response message from the second device at least partially based on the request message, the response message being related to the request to adjust the parameter associated with the discontinuous transmission configuration, and wherein determining the discontinuous reception configuration is at least partially based on the response message.

[0297] Aspect 7: The method as described in aspect 6, wherein the response message indicates one or more of the following: adjusted discontinuous transmission period, adjusted discontinuous transmission active duration, or adjusted discontinuous transmission offset, or any combination thereof, and the response message indicates a reason for rejecting the request to adjust the parameter associated with the discontinuous transmission configuration.

[0298] Aspect 8: The method as described in any one of aspects 1 to 7 further includes: receiving a set of discontinuous transmission configurations for a set of sidelink connections including the sidelink connection between the first device and the second device from a set of devices including the second device.

[0299] Aspect 9: The method as described in aspect 8 further includes: determining a subset of sidelink connections in the sidelink connection set corresponding to the same directional receive beam, the subset of sidelink connections including the sidelink connection between the first device and the second device, wherein determining the discontinuous reception configuration is at least partially based on the union of the discontinuous transmission configuration for the sidelink connection between the first device and the second device and one or more other discontinuous transmission configurations for corresponding sidelink connections in the subset of sidelink connections, the corresponding sidelink connection being between the first device and a corresponding other device associated with the corresponding sidelink connection.

[0300] Aspect 10: The method as described in aspect 9, wherein determining the subset of sidelink connections in the sidelink connection set corresponding to the same directional receive beam is at least partially based on the receiver spatial configuration associated with the first device.

[0301] Aspect 11: The method as described in any one of aspects 9 to 10, wherein the discontinuous reception configuration includes a pattern of one or more discontinuous reception cycles, each discontinuous reception cycle of the pattern corresponding to at least one of the following: a different peak quality of service metric of a corresponding discontinuous transmission configuration in one or more other discontinuous transmission configurations, or a different traffic throughput metric of a corresponding discontinuous transmission configuration in one or more other discontinuous transmission configurations, or a different spectral efficiency metric of a corresponding discontinuous transmission configuration in one or more other discontinuous transmission configurations, or a different reference signal received power metric of a corresponding discontinuous transmission configuration in one or more other discontinuous transmission configurations, or a different reference signal received quality metric of a corresponding discontinuous transmission configuration in one or more other discontinuous transmission configurations, or any combination thereof.

[0302] Aspect 12: The method as described in any one of aspects 1 to 11 further includes: transmitting a request message to a third device, the request message including a request to adjust a parameter associated with a corresponding discontinuous transmission configuration associated with the third device, wherein the parameter includes one or more of the following: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof, wherein determining the discontinuous reception configuration is at least partially based on the request to adjust the parameter associated with the corresponding discontinuous transmission configuration associated with the third device.

[0303] Aspect 13: The method as described in any one of aspects 1 to 12 further includes: transmitting the discontinuous transmission configuration and the discontinuous reception configuration for a set of sidelink connections including the sidelink connection between the first device and the second device to a set of devices including the second device.

[0304] Aspect 14: The method as described in aspect 13, wherein transmitting the discontinuous reception configuration includes: transmitting, to the set of devices including the second device, the discontinuous transmission configuration and the discontinuous reception configuration for the set of sidelink connections including the sidelink connection between the first device and the second device, at least partially based on corresponding device identifiers associated with each device in the set of devices including the second device.

[0305] Aspect 15: A method for wireless communication at a first device, including: transmitting, to a second device, a discontinuous transmission configuration for a sidelink connection between the first device and the second device; and receiving, from the second device, a discontinuous reception configuration for the sidelink connection between the first device and the second device, at least partially based on the discontinuous transmission configuration.

[0306] Aspect 16: The method as described in aspect 15, wherein the discontinuous transmission configuration is exclusively used for the sidelink connection.

[0307] Aspect 17: The method as described in any one of aspects 15 to 16, further including: receiving, from the second device, a request message including a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof.

[0308] Aspect 18: The method as described in aspect 17, further including: transmitting, to the second device, a response message at least partially based on the request message, the response message being related to the request to adjust the parameter associated with the discontinuous transmission configuration.

[0309] Aspect 19: The method as described in aspect 18, wherein the response message indicates one or more of: adjusted discontinuous transmission period, adjusted discontinuous transmission active duration, or adjusted discontinuous transmission offset, or any combination thereof.

[0310] Aspect 20: The method as described in any one of aspects 18 to 19, wherein the response message indicates a reason for rejecting the request to adjust the parameter associated with the discontinuous transmission configuration.

[0311] Aspect 21: The method as described in any one of aspects 15 to 20, wherein transmitting the discontinuous transmission configuration includes: transmitting the discontinuous transmission configuration at least partially based on a sidelink connection procedure.

[0312] Aspect 22: The method as described in aspect 21, wherein the sidelink connection procedure includes a sidelink connection establishment procedure.

[0313] Aspect 23: The method as described in aspect 22, wherein the sidelink connection establishment procedure includes a unicast radio resource control sidelink connection establishment procedure.

[0314] Aspect 24: The method as described in aspect 23, wherein transmitting the discontinuous transmission configuration includes: transmitting the discontinuous transmission configuration in a radio resource control configuration message during the unicast radio resource control sidelink connection establishment procedure.

[0315] Aspect 25: The method as described in any one of aspects 15 to 24, wherein the discontinuous transmission configuration includes a pattern of one or more discontinuous transmission cycles.

[0316] Aspect 26: The method as described in aspect 25, wherein the discontinuous transmission configuration including the pattern of one or more discontinuous transmission cycles includes a time slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof for transmitting sidelink communication on the sidelink connection.

[0317] Aspect 27: The method as described in any one of aspects 15 to 26, wherein the discontinuous reception configuration includes a pattern of one or more discontinuous reception cycles.

[0318] Aspect 28: The method as described in aspect 27, wherein the discontinuous reception configuration including the pattern of one or more discontinuous reception cycles includes a time slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof for receiving sidelink communication on the sidelink connection.

[0319] Aspect 29: An apparatus for wireless communication at a first device, comprising: a processor; and a memory coupled to the processor, the processor and the memory being configured to perform the method as described in any one of aspects 1 to 14.

[0320] Aspect 30: An equipment for wireless communication at a first device, comprising at least one means for performing the method as described in any one of aspects 1 to 14.

[0321] Aspect 31: A non-transitory computer-readable medium storing code for wireless communication at a first device, the code including instructions executable by a processor to perform the method as described in any one of aspects 1 to 14.

[0322] Aspect 32: An apparatus for wireless communication at a first device, comprising: a processor; and a memory coupled to the processor, the processor and the memory being configured to perform the method as described in any one of aspects 15 to 28.

[0323] Aspect 33: An apparatus for wireless communication at a first device, comprising at least one means for performing the method according to any one of Aspects 15 to 28.

[0324] Aspect 34: A non-transitory computer-readable medium storing code for wireless communication at a first device, the code comprising instructions executable by a processor to perform the method according to any one of Aspects 15 to 28.

[0325] Aspect 35: A method for wireless communication at a first device, comprising: receiving, from a second device, a DTX configuration for a sidelink connection between the first device and the second device; determining, at least in part based on the DTX configuration, a DRX configuration; and transmitting, to the second device, the DRX configuration for the sidelink connection.

[0326] Aspect 36: The method according to Aspect 35, wherein the DTX configuration is exclusively for the sidelink connection.

[0327] Aspect 37: The method according to Aspect 35 or 36, further comprising: receiving, from a third device, a second DTX configuration for a second sidelink connection between the first device and the third device.

[0328] Aspect 38: The method according to any one of Aspects 35 to 37, further comprising: determining a union of the DTX configuration for the sidelink connection between the first device and the second device and the second DTX configuration for the second sidelink connection between the first device and the third device, wherein determining the DRX configuration is at least in part based on the union, the DRX configuration comprising a pattern of one or more DRX cycles associated with the sidelink connection between the first device and the second device, or the second sidelink connection between the first device and the third device, or both.

[0329] Aspect 39: The method according to any one of Aspects 35 to 38, further comprising: receiving, from a set of devices including the second device, a set of DTX configurations for a set of sidelink connections including the sidelink connection between the first device and the second device.

[0330] Aspect 40: The method as described in aspect 39, further comprising: determining a subset of sidelink connections in the set of sidelink connections that correspond to the same directional receive beam, the subset of sidelink connections including the sidelink connection between the first device and the second device, wherein determining the DRX configuration is at least partially based on the union of the DTX configuration for the sidelink connection between the first device and the second device and one or more other DTX configurations for corresponding sidelink connections in the subset of sidelink connections, the corresponding sidelink connections being between the first device and corresponding other devices associated with the corresponding sidelink connections.

[0331] Aspect 41: The method as described in aspect 40, wherein determining the subset of sidelink connections in the set of sidelink connections that correspond to the same directional receive beam is at least partially based on the receiver spatial configuration associated with the first device.

[0332] Aspect 42: The method as described in aspect 40, wherein the DRX configuration includes a pattern of one or more DRX cycles, each DRX cycle in the pattern corresponding to a different peak QoS metric of a corresponding DTX configuration among one or more other DTX configurations.

[0333] Aspect 43: The method as described in aspect 40, wherein the DRX configuration includes a pattern of one or more DRX cycles, each DRX cycle in the pattern corresponding to a different traffic throughput metric of a corresponding DTX configuration among one or more other DTX configurations.

[0334] Aspect 44: The method as described in aspect 40, wherein the DRX configuration includes a pattern of one or more DRX cycles, each DRX cycle in the pattern corresponding to a different spectral efficiency metric of a corresponding DTX configuration among one or more other DTX configurations.

[0335] Aspect 45: The method as described in aspect 40, wherein the DRX configuration includes a pattern of one or more DRX cycles, each DRX cycle in the pattern corresponding to a different RSRP metric of a corresponding DTX configuration among one or more other DTX configurations.

[0336] Aspect 46: The method as described in aspect 40, wherein the DRX configuration includes a pattern of one or more DRX cycles, each DRX cycle in the pattern corresponding to a different RSRQ metric of a corresponding DTX configuration among one or more other DTX configurations.

[0337] Aspect 47: The method as described in any one of Aspects 35 to 46 further includes: transmitting a request message to the second device, the request message including a request to adjust a parameter associated with the DTX configuration, where the parameter includes one or more of the following: DTX period, DTX active duration, or DTX offset, or any combination thereof, and where determining the non-DRX configuration is at least partially based on the request to adjust the parameter associated with the DTX configuration.

[0338] Aspect 48: The method as described in Aspect 47 further includes: receiving a response message from the second device at least partially based on the request message, the response message being related to the request to adjust the parameter associated with the DTX configuration, and where determining the DRX configuration is at least partially based on the response message.

[0339] Aspect 49: The method as described in Aspect 48, where the response message indicates one or more of the following: adjusted DTX period, adjusted DTX active duration, or adjusted DTX offset, or any combination thereof.

[0340] Aspect 50: The method as described in Aspect 48, where the response message indicates the reason for rejecting the request to adjust the parameter associated with the DTX configuration.

[0341] Aspect 51: The method as described in any one of Aspects 35 to 50 further includes: transmitting a request message to a third device, the request message including a request to adjust a parameter associated with the corresponding DTX configuration associated with the third device, where the parameter includes one or more of the following: DTX period, DTX active duration, or DTX offset, or any combination thereof, and where determining the DRX configuration is at least partially based on the request to adjust the parameter associated with the corresponding DTX configuration associated with the third device.

[0342] Aspect 52: The method as described in any one of Aspects 35 to 51 further includes: transmitting the DTX configuration and the DRX configuration for a set of sidelink connections including the sidelink connection between the first device and the second device to a set of devices including the second device.

[0343] Aspect 53: The method as described in Aspect 52, where transmitting the DRX configuration includes: transmitting the DTX configuration and the DRX configuration for the set of sidelink connections including the sidelink connection between the first device and the second device to the set of devices at least partially based on corresponding device identifiers associated with each device in the set of devices including the second device.

[0344] Aspect 54: The method as described in any one of Aspects 35 to 53 further includes: receiving, from a set of devices including the second device, a set of DRX configurations for a set of sidelink connections including the sidelink connection between the first device and the second device.

[0345] Aspect 55: The method as described in any one of Aspects 35 to 54 further includes: adjusting, at least in part, a pattern of one or more DRX cycles based on a DTX configuration received from the second device for the sidelink connection.

[0346] Aspect 56: The method as described in Aspect 55 further includes: transmitting an indication of the adjusted pattern to the set of devices for each device in the set of devices to align DTX opportunities, wherein the first device has a corresponding sidelink connection with each device in the set of devices.

[0347] Aspect 57: The method as described in any one of Aspects 35 to 56 further includes: adjusting, at least in part, a pattern of one or more DRX cycles associated with the DRX configuration based on a trigger; and transmitting, at least in part, based on the adjustment, an update message to the second device, the update message including an RRC update message containing a DTX offset adjustment request.

[0348] Aspect 58: The method as described in Aspect 57, wherein the trigger includes a new sidelink connection, a new sidelink application, or both.

[0349] Aspect 59: The method as described in any one of Aspects 35 to 58 further includes: identifying capability information; and transmitting a message including the capability information associated with the first device to the second device, the message including an RRC connection message.

[0350] Aspect 60: The method as described in Aspect 59 further includes: enabling a DRX reconfiguration mode, at least in part, based on the capability information.

[0351] Aspect 61: The method as described in Aspect 59 further includes: monitoring one or more DRX cycles, at least in part, based on the DRX configuration; and activating a DRX timer, at least in part, based on the monitoring.

[0352] Aspect 62: The method as described in Aspect 61 further includes: determining, at least in part, based on the monitoring, that there is no data from the second device during the one or more DRX cycles, wherein activating the DRX timer is at least in part based on there being no data from the second device during the one or more DRX cycles.

[0353] Aspect 63: The method as described in aspect 61, further comprising: adjusting, at least in part based on the expiration of the DRX timer, a mode of one or more DRX cycles associated with the DRX configuration.

[0354] Aspect 64: The method as described in aspect 63, wherein adjusting the mode of the one or more DRX cycles includes: modifying the length of the one or more DRX cycles.

[0355] Aspect 65: The method as described in aspect 64, further comprising: transmitting an indication of the modified length of the one or more DRX cycles to the second device.

[0356] Aspect 66: The method as described in any one of aspects 35 to 65, wherein receiving the DTX configuration includes: receiving the DTX configuration at least in part based on a sidelink connection procedure.

[0357] Aspect 67: The method as described in aspect 66, wherein the sidelink connection procedure includes a sidelink connection establishment procedure.

[0358] Aspect 68: The method as described in aspect 67, wherein the sidelink connection establishment procedure includes a unicast RRC sidelink connection establishment procedure.

[0359] Aspect 69: The method as described in aspect 68, wherein receiving the DTX configuration includes: receiving the DTX configuration in an RRC configuration message during the unicast RRC sidelink connection establishment procedure.

[0360] Aspect 70: The method as described in any one of aspects 35 to 69, wherein the DTX configuration includes a mode of one or more DTX cycles.

[0361] Aspect 71: The method as described in aspect 70, wherein the DTX configuration including the mode of the one or more DTX cycles includes a time slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for transmitting sidelink communication on the sidelink connection.

[0362] Aspect 72: The method as described in any one of aspects 35 to 71, wherein the DRX configuration includes a mode of one or more DRX cycles.

[0363] Aspect 73: The method as described in aspect 72, wherein the DRX configuration including the mode of the one or more DRX cycles includes a time slot offset, a frame offset, a periodicity, or an active duration, or any combination thereof, for receiving sidelink communication on the sidelink connection.

[0364] Aspect 74: The method as described in any one of Aspects 35 to 73 further includes: identifying at least in part a DTX period, a DTX active duration, or a DTX offset, or any combination thereof, based on the DTX configuration, wherein determining the DRX configuration is at least in part based on the DTX period, the DTX active duration, or the DTX offset, or any combination thereof.

[0365] Aspect 75: The method as described in Aspect 74, wherein one or more of the DTX period, the DTX active duration, or the DTX offset is at least in part based on the traffic load associated with the sidelink connection.

[0366] Aspect 76: The method as described in Aspect 74, wherein one or more of the DTX period, the DTX active duration, or the DTX offset is at least in part based on the data radio bearer configuration associated with the sidelink connection.

[0367] Aspect 77: The method as described in any one of Aspects 35 to 76, wherein the wireless communication includes sidelink communication.

[0368] Aspect 78: The method as described in Aspect 77, wherein the sidelink communication includes vehicle-to-everything (V2X) communication.

[0369] Aspect 79: The method as described in any one of Aspects 35 to 78, wherein receiving the DTX configuration for the sidelink connection is at least in part based on the broadcast connection associated with the second device.

[0370] Aspect 80: The method as described in Aspect 79, wherein the DTX configuration is shared for all sidelink connections associated with the broadcast connection associated with the second device, wherein the DTX configuration is shared for at least the sidelink connection between the first device and the second device and the second sidelink connection between the third device and the second device.

[0371] Aspect 81: The method as described in Aspect 79, wherein one or more DTX configurations vary at least in part based on the unicast traffic load associated with the one or more sidelink connections on the one or more sidelink connections associated with the broadcast connection associated with the second device.

[0372] Aspect 82: The method as described in any one of Aspects 35 to 47, wherein receiving the DTX configuration for the sidelink connection is at least in part based on the multicast connection associated with the second device.

[0373] Aspect 83: The method as described in aspect 82, wherein the DTX configuration is common for all sidelink connections associated with the multicast connection associated with the second device, and wherein the DTX configuration is common for at least the sidelink connection between the first device and the second device and the second sidelink connection between the third device and the second device.

[0374] Aspect 84: The method as described in aspect 82, wherein one or more DTX configurations vary at least in part based on the unicast traffic load associated with one or more sidelink connections associated with the multicast connection associated with the second device.

[0375] Aspect 85: A method for wireless communication at a first device, comprising: determining a DTX configuration for a sidelink connection between the first device and a second device; transmitting the DTX configuration to the second device; and receiving, at least in part based on the DTX configuration, a DRX configuration for the sidelink connection between the first device and the second device from the second device.

[0376] Aspect 86: The method as described in aspect 85, wherein the DTX configuration is exclusively used for the sidelink connection.

[0377] Aspect 87: The method as described in aspect 85 or 86, further comprising: receiving a request message from the second device, the request message including a request to adjust a parameter associated with the DTX configuration, wherein the parameter includes one or more of the following: DTX period, DTX active duration, or DTX offset, or any combination thereof.

[0378] Aspect 88: The method as described in aspect 87, further comprising: transmitting a response message to the second device, at least in part based on the request message, the response message being related to the request to adjust the parameter associated with the DTX.

[0379] Aspect 89: The method as described in aspect 88, the response message indicating one or more of the following: adjusted DTX period, adjusted DTX active duration, or adjusted DTX offset, or any combination thereof.

[0380] Aspect 90: The method as described in aspect 88, wherein the response message indicates a reason for rejecting the request to adjust the parameter associated with the DTX configuration.

[0381] Aspect 91: The method as described in any one of aspects 85 to 90, wherein transmitting the DTX configuration comprises: transmitting the DTX configuration at least in part based on the sidelink connection procedure.

[0382] Aspect 92: The method as described in aspect 91, wherein the sidelink connection procedure includes a sidelink connection establishment procedure.

[0383] Aspect 93: The method as described in aspect 92, wherein the sidelink connection establishment procedure includes a unicast RRC sidelink connection establishment procedure.

[0384] Aspect 94: The method as described in aspect 93, wherein transmitting the DTX configuration includes: transmitting the DTX configuration in an RRC configuration message during the unicast RRC sidelink connection establishment procedure.

[0385] Aspect 95: The method as described in any one of aspects 85 to 94, wherein the DTX configuration includes a pattern of one or more DTX cycles.

[0386] Aspect 96: The method as described in aspect 95, wherein the DTX configuration including the pattern of one or more DTX cycles includes a time slot offset, a frame offset, a periodicity, or an active duration for transmitting sidelink communication on the sidelink connection or any combination thereof.

[0387] Aspect 97: The method as described in any one of aspects 85 to 96, wherein the DRX configuration includes a pattern of one or more DRX cycles.

[0388] Aspect 98: The method as described in aspect 97, wherein the DRX configuration including the pattern of one or more DRX cycles includes a time slot offset, a frame offset, a periodicity, or an active duration for receiving sidelink communication on the sidelink connection or any combination thereof.

[0389] Aspect 99: The method as described in any one of aspects 85 to 98, wherein the DTX configuration includes a DTX period, a DTX active duration, or a DTX offset, or any combination thereof.

[0390] Aspect 100: The method as described in aspect 99, wherein one or more of the DTX period, the DTX active duration, or the DTX offset is at least partially based on the traffic load associated with the sidelink connection.

[0391] Aspect 101: The method as described in aspect 99, wherein one or more of the DTX period, the DTX active duration, or the DTX offset is at least partially based on the data radio bearer configuration associated with the sidelink connection.

[0392] Aspect 102: The method as described in any one of aspects 85 to 101, wherein the wireless communication includes sidelink communication.

[0393] Aspect 103: The method as described in aspect 102, wherein the sidelink communication includes vehicle-to-everything communication.

[0394] Aspect 104: The method as described in any one of Aspects 85 to 103, wherein transmitting the DTX configuration includes: broadcasting the DTX configuration to the set of devices at least partially based on a broadcast connection associated with the set of devices including the second device.

[0395] Aspect 105: The method as described in Aspect 104, wherein the DTX configuration is common for all sidelink connections associated with the broadcast connection associated with the set of devices.

[0396] Aspect 106: The method as described in Aspect 105, wherein the DTX configuration is common for at least the sidelink connection between the first device and the second device and the second sidelink connection between the third device and the first device.

[0397] Aspect 107: The method as described in Aspect 104, wherein one or more DTX configurations vary at least partially based on the unicast traffic load associated with one or more sidelink connections on one or more sidelink connections associated with the broadcast connection associated with the set of devices.

[0398] Aspect 108: The method as described in any one of Aspects 85 to 107, wherein transmitting the DTX configuration includes: transmitting the DTX configuration to the set of devices at least partially based on a multicast connection associated with the set of devices including the second device.

[0399] Aspect 109: The method as described in Aspect 108, wherein the DTX configuration is common for all sidelink connections associated with the multicast connection, and wherein the DTX configuration is common for at least the sidelink connection between the first device and the second device and the second sidelink connection between the third device and the first device.

[0400] Aspect 110: The method as described in Aspect 108, wherein one or more DTX configurations vary at least partially based on the unicast traffic load associated with one or more sidelink connections on one or more sidelink connections associated with the multicast connection associated with the set of devices.

[0401] Aspect 111. An apparatus for wireless communication, comprising: a processor; and a memory coupled to the processor, the processor and the memory being configured to perform the method as described in any one of Aspects 35 to 84.

[0402] Aspect 112. A device for wireless communication, comprising at least one means for performing the method as described in any one of Aspects 35 to 84.

[0403] Aspect 113. A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform a method as described in any of Aspects 35 to 84.

[0404] Aspect 114. An apparatus for wireless communication, comprising: a processor; and a memory coupled to the processor, the processor and the memory being configured to perform a method as described in any of Aspects 85 to 110.

[0405] Aspect 115. A device for wireless communication, comprising at least one means for performing a method as described in any of Aspects 85 to 110.

[0406] Aspect 116. A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform a method as described in any of Aspects 85 to 110.

[0407] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and the terms LTE, LTE-A, LTE-A Pro, or NR 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.

[0408] The information and signals described herein may be represented using any of a variety of different arts and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0409] 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. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0410] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations fall within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software, hardware, firmware, hardwiring, or any combination thereof executed by a processor. The features implementing the functions can also be physically located in various positions, including being distributed such that portions of the functions are implemented at different physical locations.

[0411] 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 can be any available media that can be accessed by a general or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include random access memory (RAM), read only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disc read only memory (CD-ROM) or other optical disc 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 in the form of instructions or data structures and that can be accessed by a general or special purpose computer, or a general or special purpose processor. Similarly, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a web site, 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. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks usually reproduce data magnetically and discs reproduce data optically with lasers. Combinations of the above media are also included within the scope of computer-readable media.

[0412] As used herein, including in the claims, the "or" used in a list of items (e.g., a list of items accompanied by language such as "at least one of" or "one or more of") indicates an inclusive listing such that, for example, the listing 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). Similarly, as used herein, the phrase "based on" should not be construed as reciting a closed set of conditions. For example, an example operation 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 construed in the same manner as the phrase "at least partially based on".

[0413] In the figures, similar components or features may have the same reference numeral. Additionally, each of the same type of components may be distinguished by following the reference numeral with a dash and a second identifier that differentiates between similar components. If only the first reference numeral is used in the specification, the description may apply to any one of the similar components having the same first reference numeral regardless of the second reference numeral, or any other subsequent reference numerals.

[0414] The description set forth herein with reference to the drawings describes example configurations and does not represent all examples that may be implemented or that fall within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration" and does not mean "superior to other examples" or "an improvement over other examples". This detailed description includes specific details to provide an understanding of the described techniques. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0415] The present disclosure is provided to enable a person of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to a person of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not 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. A method for wireless communication by a first device, comprising: receiving, from a second device, a discontinuous transmission configuration for a sidelink connection between the first device and the second device; transmitting a request message to the second device, the request message including a request to adjust a parameter associated with the discontinuous transmission configuration, wherein the parameter includes one or more of the following: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof; and transmitting a discontinuous reception configuration for the sidelink connection to the second device, the discontinuous reception configuration being at least partially based on the request to adjust the parameter associated with the discontinuous transmission configuration.

2. The method according to claim 1, further comprising: receiving, from a third device, a second discontinuous transmission configuration for a second sidelink connection between the first device and the third device.

3. The method according to claim 2, further comprising: determining a union of the discontinuous transmission configuration for the sidelink connection between the first device and the second device and the second discontinuous transmission configuration for the second sidelink connection between the first device and the third device, wherein determining the discontinuous reception configuration is at least partially based on the union, the discontinuous reception configuration including a pattern of one or more discontinuous reception cycles associated with the sidelink connection between the first device and the second device, or the second sidelink connection between the first device and the third device, or both.

4. The method according to claim 1, wherein, the discontinuous transmission configuration is exclusively used for the sidelink connection.

5. The method according to claim 1, further comprising: receiving, from the second device, a response message at least partially based on the request message, the response message being related to the request to adjust the parameter associated with the discontinuous transmission configuration, wherein determining the discontinuous reception configuration is at least partially based on the response message.

6. The method according to claim 5, wherein, the response message indicates one or more of the following: adjusted discontinuous transmission period, adjusted discontinuous transmission active duration, or adjusted discontinuous transmission offset, or any combination thereof, and wherein the response message indicates a reason for rejecting the request to adjust the parameter associated with the discontinuous transmission configuration.

7. The method according to claim 1, further comprising: receiving, from a set of devices including the second device, a set of discontinuous transmission configurations for a set of sidelink connections including the sidelink connection between the first device and the second device.

8. The method according to claim 7, further comprising: determining a subset of sidelink connections in the set of sidelink connections corresponding to the same directional reception beam, the subset of sidelink connections including the sidelink connection between the first device and the second device, wherein determining the discontinuous reception configuration is at least partially based on a union of the discontinuous transmission configuration for the sidelink connection between the first device and the second device and one or more other discontinuous transmission configurations for corresponding sidelink connections in a subset of the sidelink connections, the corresponding sidelink connections being between the first device and corresponding other devices associated with the corresponding sidelink connections.

9. The method of claim 8, wherein: determining the subset of the sidelink connections in the sidelink connection set corresponding to the same directional reception beam is at least partially based on a receiver spatial configuration associated with the first device.

10. The method of claim 8, wherein, the discontinuous reception configuration includes a pattern of one or more discontinuous reception cycles, and each discontinuous reception cycle of the pattern corresponds to at least one of the following: a different peak quality of service metric of a corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, or a different traffic throughput metric of the corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, or a different spectral efficiency metric of the corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, or a different reference signal received power metric of the corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, or a different reference signal received quality metric of the corresponding discontinuous transmission configuration among the one or more other discontinuous transmission configurations, or any combination thereof.

11. The method of claim 1, further including: transmitting a request message to a third device, the request message including a request to adjust a parameter associated with a corresponding discontinuous transmission configuration associated with the third device, where the parameter includes one or more of the following: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof, wherein determining the discontinuous reception configuration is at least partially based on the request to adjust the parameter associated with the corresponding discontinuous transmission configuration associated with the third device.

12. The method of claim 1, further including: transmitting the discontinuous transmission configuration and the discontinuous reception configuration for a set of sidelink connections including the sidelink connection between the first device and the second device to a set of devices including the second device.

13. The method of claim 12, wherein, transmitting the discontinuous reception configuration includes: transmitting the discontinuous transmission configuration and the discontinuous reception configuration for the set of sidelink connections including the sidelink connection between the first device and the second device to the set of devices at least partially based on corresponding device identifiers associated with each device in the set of devices including the second device.

14. A method for wireless communication by a first device, including: transmitting a discontinuous transmission configuration for a sidelink connection between the first device and a second device; Receive a request message from the second device, the request message including a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of the following: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof; and Receive, at least in part based on the request to adjust the parameter associated with the discontinuous transmission configuration, a discontinuous reception configuration for the sidelink connection between the first device and the second device from the second device.

15. The method according to claim 14, wherein, the discontinuous transmission configuration is exclusively used for the sidelink connection.

16. The method according to claim 14, further comprising: Transmit a response message to the second device, at least in part based on the request message, the response message being related to the request to adjust the parameter associated with the discontinuous transmission configuration.

17. The method according to claim 16, wherein, the response message indicates one or more of: adjusted discontinuous transmission period, adjusted discontinuous transmission active duration, or adjusted discontinuous transmission offset, or any combination thereof.

18. The method according to claim 16, wherein, the response message indicates the reason for rejecting the request to adjust the parameter associated with the discontinuous transmission configuration.

19. The method according to claim 14, wherein, transmitting the discontinuous transmission configuration includes: Transmit the discontinuous transmission configuration, at least in part based on the sidelink connection procedure.

20. The method according to claim 19, wherein, the sidelink connection procedure includes a sidelink connection establishment procedure.

21. The method according to claim 20, wherein, the sidelink connection establishment procedure includes a unicast radio resource control sidelink connection establishment procedure.

22. The method according to claim 21, wherein, transmitting the discontinuous transmission configuration includes: Transmit the discontinuous transmission configuration in a radio resource control configuration message during the unicast radio resource control sidelink connection establishment procedure.

23. The method according to claim 14, wherein, the discontinuous transmission configuration includes a pattern of one or more discontinuous transmission cycles.

24. The method according to claim 23, wherein, the discontinuous transmission configuration including the pattern of one or more discontinuous transmission cycles includes a time slot offset, frame offset, periodicity, or active duration, or any combination thereof for transmitting sidelink communication on the sidelink connection.

25. The method according to claim 14, wherein, the discontinuous reception configuration includes a pattern of one or more discontinuous reception cycles.

26. The method according to claim 25, wherein, the discontinuous reception configuration including the pattern of one or more discontinuous reception cycles includes a time slot offset, frame offset, periodicity, or active duration, or any combination thereof for receiving sidelink communication on the sidelink connection.

27. An apparatus for wireless communication at a first device, comprising: Apparatus for receiving, from a second device, a discontinuous transmission configuration for a sidelink connection between the first device and the second device; Apparatus for transmitting a request message to the second device, the request message including a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof; and Apparatus for transmitting, to the second device, a discontinuous reception configuration for the sidelink connection, the discontinuous reception configuration being at least partially based on the request to adjust the parameter associated with the discontinuous transmission configuration.

28. The apparatus of claim 27, further comprising apparatus for performing the method of any one of claims 2 - 13.

29. An apparatus for wireless communication at a first device, comprising: Apparatus for transmitting, to a second device, a discontinuous transmission configuration for a sidelink connection between the first device and the second device; Apparatus for receiving, from the second device, a request message, the request message including a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof; and Apparatus for receiving, from the second device, a discontinuous reception configuration for the sidelink connection between the first device and the second device, at least partially based on the request to adjust the parameter associated with the discontinuous transmission configuration.

30. The apparatus of claim 29, further comprising apparatus for performing the method of any one of claims 15 - 26.

31. An apparatus for wireless communication at a first device, comprising: One or more memories; and One or more processors, the one or more processors being coupled to the one or more memories and configured to cause the first device to: Receive a discontinuous transmission configuration for a sidelink connection between the first device and the second device from the second device; Transmit a request message to the second device, the request message including a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof; and Transmit a discontinuous reception configuration for the sidelink connection to the second device, the discontinuous reception configuration being at least partially based on the request to adjust the parameter associated with the discontinuous transmission configuration.

32. The apparatus of claim 31, wherein the one or more processors are further configured to cause the first device to perform the method of any one of claims 2 - 13.

33. An apparatus for wireless communication at a first device, comprising: One or more memories; and One or more processors, the one or more processors being coupled to the one or more memories and configured to cause the first device to: Transmit to a second device a discontinuous transmission configuration for a sidelink connection between the first device and the second device; Receive from the second device a request message, the request message including a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof; and Receive from the second device a discontinuous reception configuration for the sidelink connection between the first device and the second device, at least partially based on the request to adjust the parameter associated with the discontinuous transmission configuration.

34. The apparatus of claim 33, wherein the one or more processors are further configured to cause the first device to perform the method of any one of claims 15 - 26.

35. A non - transient computer - readable medium storing code for wireless communication at a first device, the code including instructions executable by one or more processors to cause the first device to perform the following operations: Receive from a second device a discontinuous transmission configuration for a sidelink connection between the first device and the second device; Transmit to the second device a request message, the request message including a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof; and Transmit to the second device a discontinuous reception configuration for the sidelink connection, the discontinuous reception configuration being at least partially based on the request to adjust the parameter associated with the discontinuous transmission configuration.

36. The non - transient computer - readable medium of claim 35, wherein the instructions are further executable by the one or more processors to cause the first device to perform the method of any one of claims 2 - 13.

37. A non - transient computer - readable medium storing code for wireless communication at a first device, the code including instructions executable by one or more processors to cause the first device to perform the following operations: Transmit to a second device a discontinuous transmission configuration for a sidelink connection between the first device and the second device; Receive from the second device a request message, the request message including a request to adjust a parameter associated with the discontinuous transmission configuration, where the parameter includes one or more of: discontinuous transmission period, discontinuous transmission active duration, or discontinuous transmission offset, or any combination thereof; and Receive from the second device a discontinuous reception configuration for the sidelink connection between the first device and the second device, at least partially based on the request to adjust the parameter associated with the discontinuous transmission configuration.

38. The non-transitory computer-readable medium of claim 37, wherein the instructions are further executable by the one or more processors to cause the first device to perform the method of any one of claims 15-26.

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