Scheduling Request Operation in Connected Mode Discontinuous Reception

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may use one or more antenna subarrays to perform scheduling request (SR) operations with one or more corresponding transmit receive points (TRPs) when operating in a connected discontinuous reception mode. In some implementations, the UE may receive a configuration indicating its set of antenna subarrays and the corresponding set of TRPs with which to perform SR operations. Based on the configuration, the UE may use its set of antenna subarrays to transmit SRs to the set of TRPs, receive uplink grants from at least one TRP in the set of TRPs, and transmit uplink data to the at least one TRP. Additionally or alternatively, the UE may autonomously determine the set of antenna elements and the set of TRPs to use for SR operations, and transmit an indication of the determination when transmitting the SR.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. patent application No. 16 / 785,949, filed by PARK et al. on February 10, 2020, entitled “SCHEDULING REQUESTOPERATION IN CONNECTED MODE DISCONTINUOUS RECEPTIION,” which claims priority to U.S. provisional patent application No. 62 / 815,269, filed by PARK et al. on March 7, 2019, entitled “SCHEDULING REQUEST OPERATION IN CONNECTED MODE DISCONTINUOUS RECEPTION,” which are assigned to the assignee of this application.

[0003] background

[0004] The following relates generally to wireless communications, and more particularly to scheduling request (SR) operations in connected mode discontinuous reception (DRX).

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems that may be referred to as new radio (NR) systems. These systems may use various technologies, 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). A wireless multiple access communication system may include several base stations or network access nodes, each of which simultaneously supports the communication of multiple communication devices, which may be referred to as user equipment (UE).

[0006] In some wireless communication systems, a UE may communicate with a base station (including, for example, via one or more transmit receive points (TRPs)) according to a connected DRX (CDRX) mode, wherein the UE transitions between a sleep state and an awake state based on the CDRX mode without receiving signaling to initiate the transition. During the awake state, the base station may transmit downlink information to the UE, and the UE may monitor the downlink channel (e.g., to find downlink information). Additionally, when the UE detects that uplink information is to be transmitted to the base station, the UE may enter the awake state, and during the awake state, transmit an SR to the base station to request configuration information to subsequently transmit the uplink information (e.g., in the same awake state or in a different awake state). However, the UE may communicate concurrently with multiple TRPs (e.g., multiple TRPs associated with the same base station or with two or more different base stations), which may cause complexity when the UE determines to which TPR the UE will transmit an SR for uplink transmission.

[0007] Overview

[0008] The described technology relates to improved methods, systems, devices and apparatuses for supporting scheduling request (SR) operations in connected mode discontinuous reception (DRX). In general, the described technology provides a user equipment (UE) using one or more antenna subarrays (which may also be referred to as, for example, panels or antenna panels) to perform SR operations with one or more corresponding transmit receive points (TRPs). Such SR operations can be performed when the UE is operating in a mode that provides a wake-up or active state that alternates with a sleep or inactive state of the UE, such as in a connected DRX (CDRX) mode. In some implementations, the UE may receive a configuration indicating a set of antenna subarrays, a set of TRPs, or both of the UE from a base station associated with one or more TRPs, with which the UE is to perform SR operations. Based on this configuration, the UE may then use the UE's set of antenna subarrays to transmit an SR to one or more TRPs in the TRP set, receive an uplink grant from at least one TRP in the TRP set based on the SR transmission, and transmit uplink data to the at least one TRP based on receiving the uplink grant.

[0009] In some implementations, the set of antenna elements, or the set of TRPs, or both may be dynamically selected (e.g., selected by the UE) or semi-statically selected (e.g., selected by one of the TRPs and signaled to the UE with the indicated configuration). Additionally or alternatively, the UE may determine the set of antenna subarrays, the set of TRPs, or both for SR operation, and then transmit an indication of the determined set (e.g., as a preferred configuration) when transmitting the SR. The UE may receive an uplink grant based on the indication transmitted with the SR, and transmit uplink data based on the uplink grant (and, in some implementations, the indication).

[0010] A method of wireless communication at a UE is described. The method may include: receiving a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in a DRX mode; transmitting an SR based on the received configuration when operating in the DRX mode; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the received configuration.

[0011] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for use by the UE to communicate when operating in a DRX mode; transmit an SR based on the received configuration when operating in the DRX mode; receive an uplink grant in response to the transmitted SR; and transmit uplink data based on the received uplink grant and the received configuration.

[0012] Another apparatus for wireless communication at a UE is described. The apparatus may include means for: receiving a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in a DRX mode; transmitting an SR based on the received configuration when operating in the DRX mode; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the received configuration.

[0013] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor for the following operations: receiving a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in a DRX mode; transmitting an SR based on the received configuration when operating in the DRX mode; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the received configuration.

[0014] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, transmitting the SR may include operations, features, apparatus, or instructions for the following actions: using multiple antenna subarrays of the UE to transmit the SR to multiple TRPs, wherein the TRP set includes the multiple TRPs, and the antenna subarray set of the UE includes the multiple antenna subarrays.

[0015] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, transmitting the SR may include operations, features, apparatus, or instructions for transmitting the SR using an antenna subarray set indicated by the received configuration, the antenna subarray set comprising a subset of a set of antenna subarrays of the UE.

[0016] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, receiving the configuration may include operations, features, apparatus, or instructions for the following actions: receiving the configuration in one or more of radio resource control (RRC) signaling, downlink control information (DCI), or media access control (MAC) control element (MAC-CE).

[0017] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: selecting, by the UE, at least one antenna subarray from the UE's antenna subarray set for performing one or more of the following: transmitting the SR, receiving the uplink grant, or transmitting the uplink data.

[0018] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the uplink grant in response to the transmitted SR may include operations, features, apparatuses, or instructions for: receiving an uplink grant for a first TRP from a first TRP in the TRP set in response to the transmitted SR; and receiving an uplink grant for a second TRP from a second TRP in the TRP set in response to the transmitted SR.

[0019] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the TRP set may include operations, features, apparatus, or instructions for the following actions: receiving an uplink grant for each TRP in the TRP set in response to the transmitted SR.

[0020] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the SR may be transmitted to a first TRP in the set of TRPs, and an uplink grant may be received from the first TRP in response to the transmitted SR.

[0021] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the TRP set may include operations, features, apparatus, or instructions for transmitting uplink data to each TRP in the TRP set.

[0022] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, transmitting the uplink data may include operations, features, apparatus, or instructions for the following actions: identifying that one or more TRPs in the TRP set have transmitted an uplink grant in response to the transmitted SR, and transmitting uplink data to the one or more TRPs based on the identification.

[0023] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, an SR may be transmitted on an uplink control channel, an uplink grant may be received on a downlink control channel, and uplink data may be transmitted on an uplink shared channel.

[0024] A method of wireless communication at a UE is described. The method may include: transmitting an SR when operating in a DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the indication in the transmitted SR.

[0025] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: transmit an SR when operating in a DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE; receive an uplink grant in response to the transmitted SR; and transmit uplink data based on the received uplink grant and the indication in the transmitted SR.

[0026] Another apparatus for wireless communication at a UE is described. The apparatus may include means for: transmitting an SR when operating in a DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the indication in the transmitted SR.

[0027] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor for the following operations: transmitting an SR when operating in a DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof for the UE; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the indication in the transmitted SR.

[0028] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the TRP set may include operations, features, apparatus, or instructions for transmitting uplink data to the TRP set based on an indication in a received uplink grant and a transmitted SR.

[0029] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, transmitting the uplink data to the TRP set may include operations, features, apparatus, or instructions for the following actions: transmitting the uplink data to the TRP set using multiple antenna subarrays of the UE, the antenna subarray set including the multiple antenna subarrays.

[0030] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the SR may be transmitted using a second antenna subarray in an antenna subarray set of the UE, the second antenna subarray being different from a first antenna subarray in the antenna subarray set used to transmit the uplink data.

[0031] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, receiving the uplink grant in response to the transmitted SR may include operations, features, apparatus, or instructions for receiving the uplink grant using the antenna subarray set of the UE indicated in the transmitted SR.

[0032] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the set of antenna subarrays may include a second antenna subarray that is different from a first antenna subarray in the set of antenna subarrays used to transmit uplink data.

[0033] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the set of antenna subarrays may include a group of antenna subarrays.

[0034] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for determining a channel quality associated with each TRP in the TRP set, and determining the TRP set based on the determined channel quality, wherein the transmitted SR indicates the determined TRP set.

[0035] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: determining a channel quality associated with each antenna subarray in an antenna subarray set of a UE, and determining the antenna subarray set based on the determined channel quality, wherein the transmitted SR indicates the determined antenna subarray set.

[0036] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, an SR may be transmitted on an uplink control channel, an uplink grant may be received on a downlink control channel, and uplink data may be transmitted on an uplink shared channel.

[0037] A method of wireless communication at a base station is described. The method may include: transmitting to a UE a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in a DRX mode; receiving an SR from the UE based on the transmitted configuration; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data from the UE based on the transmitted uplink grant.

[0038] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: transmit to a UE a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in a DRX mode; receive an SR from the UE based on the transmitted configuration; transmit an uplink grant to the UE in response to the received SR; and receive uplink data from the UE based on the transmitted uplink grant.

[0039] Another apparatus for wireless communication at a base station is described. The apparatus may include means for transmitting to a UE a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in a DRX mode; receiving an SR from the UE based on the transmitted configuration; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data from the UE based on the transmitted uplink grant.

[0040] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor for the following operations: transmitting to a UE a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in a DRX mode; receiving an SR from the UE based on the transmitted configuration; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data from the UE based on the transmitted uplink grant.

[0041] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, receiving the SR may include operations, features, apparatus, or instructions for the following actions: receiving the SR via multiple TRPs, wherein each TRP in the TRP set monitors the SR from the UE.

[0042] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the SR may include operations, features, apparatuses, or instructions for the following actions: receiving the SR via a TRP in the TRP set, wherein each TRP in the TRP set monitors the SR from the UE.

[0043] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, receiving the SR may include operations, features, apparatus, or instructions for the following actions: identifying an anchor TRP in the TRP set, wherein the anchor TRP monitors the SR from the UE, and receiving the SR via the anchor TRP.

[0044] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, transmitting the configuration may include operations, features, apparatus, or instructions for the following actions: transmitting the configuration in one or more of RRC signaling, DCI, or MAC CE.

[0045] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for transmitting an uplink grant for a second TRP via a second TRP in the TRP set in response to a received SR.

[0046] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, an SR may be received via a first TRP in the set of TRPs, and an uplink grant may be transmitted via the first TRP in response to the received SR.

[0047] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: determining to suppress transmitting an uplink grant via a second TRP based on determining that the base station failed to receive a second SR via a second TRP in the TRP set.

[0048] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, receiving the uplink data may include operations, features, apparatus, or instructions for the following actions: receiving the uplink data via each of a plurality of TRPs, wherein the TRP set includes the plurality of TRPs.

[0049] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, receiving the uplink data may include operations, features, apparatus, or instructions for the following actions: identifying that one or more TRPs in the TRP set have transmitted an uplink grant in response to the received SR, and receiving uplink data from the UE via the one or more TRPs based on the identification.

[0050] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, an SR may be received on an uplink control channel, an uplink grant may be transmitted on a downlink control channel, and uplink data may be received on an uplink shared channel.

[0051] A method of wireless communication at a base station is described. The method may include: receiving an SR from a UE operating in a DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data based on the transmitted uplink grant and the indication in the received SR.

[0052] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: receive an SR from a UE operating in a DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE; transmit an uplink grant to the UE in response to the received SR; and receive uplink data based on the transmitted uplink grant and the indication in the received SR.

[0053] Another apparatus for wireless communication at a base station is described. The apparatus may include means for: receiving an SR from a UE operating in a DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data based on the transmitted uplink grant and the indication in the received SR.

[0054] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor for the following operations: receiving an SR from a UE operating in a DRX mode, the SR including an indication of an antenna subarray set, or a TRP set, or a combination thereof for the UE; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data based on the transmitted uplink grant and the indication in the received SR.

[0055] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, receiving the uplink data may include operations, features, apparatus, or instructions for the following actions: receiving uplink data from the UE via multiple TRPs based on the transmitted uplink grant and the indication in the received SR, the TRP set including the multiple TRPs.

[0056] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the SR may be received via a second TRP in the TRP set, the second TRP being different from a first TRP in the TRP set that is used to receive uplink data.

[0057] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, transmitting the uplink grant in response to the received SR may include operations, features, apparatus, or instructions for transmitting the uplink grant via at least one TRP in the TRP set indicated in the received SR.

[0058] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: determining a TRP in the TRP set indicated in the received SR, wherein the uplink grant is transmitted via the determined TRP.

[0059] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: determining a plurality of TRPs in the TRP set indicated in the received SR, wherein the uplink grant is transmitted via the determined plurality of TRPs.

[0060] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the indicated TRP set may be determined based on a channel quality associated with one or more of: each TRP in the TRP set, or each antenna subarray in the antenna subarray set.

[0061] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the indicated set of antenna subarrays may be determined based on a channel quality associated with one or more of: each TRP in the set of TRPs, or each antenna subarray in the set of antenna subarrays.

[0062] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, an SR may be received on an uplink control channel, an uplink grant may be transmitted on a downlink control channel, and uplink data may be received on an uplink shared channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 An example of a wireless communication system supporting scheduling request (SR) operation in connected mode discontinuous reception (DRX) in accordance with aspects of the present disclosure is illustrated.

[0065] Figure 2 An example of a wireless communication system supporting SR operation in a connected DRX (CDRX) mode in accordance with aspects of the present disclosure is illustrated.

[0066] Figure 3 , 4 5 illustrate examples of SR operation in CDRX mode according to aspects of the present disclosure.

[0067] Figure 6 and 7 An example of a process flow supporting SR operation in CDRX mode according to aspects of the present disclosure is illustrated.

[0068] Figure 8 and 9 A block diagram of a device supporting SR operation in CDRX mode according to aspects of the present disclosure is shown.

[0069] Fig.10 A block diagram of a UE communications manager supporting SR operations in CDRX mode according to aspects of the present disclosure is shown.

[0070] Fig.11 A diagram of a system including a device supporting SR operation in CDRX mode is shown in accordance with aspects of the present disclosure.

[0071] Fig.12 and 13 A block diagram of a device supporting SR operation in CDRX mode according to aspects of the present disclosure is shown.

[0072] Fig.14 A block diagram of a base station communications manager supporting SR operations in CDRX mode is shown in accordance with aspects of the present disclosure.

[0073] Fig.15 A diagram of a system including a device supporting SR operation in CDRX mode is shown in accordance with aspects of the present disclosure.

[0074] Figures 16 to 20 A flow chart of a method of supporting SR operation in CDRX mode according to aspects of the present disclosure is shown.

[0075] Detailed Description

[0076] In some wireless communication systems, a user equipment (UE) may communicate concurrently with one or more transmit receive points (TRPs) (e.g., TRPs associated with the same base station or with two or more different base stations) via one or more antenna subarrays (also referred to as, for example, panels or antenna panels) according to a pattern that provides alternating awake (or active) and dormant (or inactive) states (e.g., a connected mode of a discontinuous reception (DRX) cycle). In some implementations, the UE may use separate antenna subarrays (i.e., sets of antennas used for, for example, beamforming, transmit diversity, receive diversity, or multiple-input multiple-output (MIMO) communications) for communications with the TRPs based on, for example, corresponding orientations of the antenna subarrays on the UE or physical locations of the antenna subarrays. In a connected DRX (CDRX) mode (e.g., a connected mode of a DRX cycle), the UE may transition between dormant and awake states signal-free (i.e., without requiring signaling from one of the TRPs to wake the UE). During the awake state, one or more of these TRPs may transmit downlink information (such as control or data) to the UE on one or more downlink channels, and the UE may accordingly monitor the downlink channels for incoming downlink information from these TRPs (e.g., using the corresponding antenna subarrays associated with the TRPs).

[0077] Additionally or alternatively, if the UE detects that the UE has uplink information (such as data) to transmit, the UE may perform a scheduling request (SR) operation to request resources and configuration information for subsequent transmission of the uplink data. For example, the SR operation may include the UE transmitting an SR to one of the TRPs via an uplink channel, the TRP transmitting an uplink grant to the UE via a downlink channel, and the UE transmitting uplink data via the uplink channel on resources as indicated in the uplink grant. However, as described above, the UE may be communicating with multiple TRPs concurrently, which may complicate the SR operation based on the UE not knowing which TRP to perform the SR operation with.

[0078] As described herein, a first TRP (i.e., any of one or more TRPs to which the UE is connected) may transmit configuration information regarding which antenna subarrays to use when transmitting an SR, which TRPs to perform future SR operations with (e.g., which TRPs will transmit uplink grants), and which antenna subarrays to use when transmitting uplink data for the SR, or a combination thereof. In some implementations, the configuration information may include an indication of resources for SR transmission, for receiving uplink grants, for transmitting uplink grants, or a combination thereof for SR operations.

[0079] Based on the configuration information, the UE may transmit an SR to the corresponding TRPs using each antenna subarray, transmit an SR using a subset of the UE's antenna subarrays, or transmit an SR to a corresponding TRP using one antenna subarray. In some implementations, the one subarray may be dynamically selected (e.g., selected by a base station or TRP, which signals the selection via downlink control information (DCI) or a media access control (MAC) control element (MAC-CE), or selected by the UE) or semi-statically selected (e.g., selected by a base station or TRP, which signals the selection via radio resource control (RRC) signaling). The corresponding TRPs or the corresponding TRPs may then transmit an uplink grant to the UE based on receiving the SR. That is, if the UE uses each antenna subarray to transmit an SR to the corresponding TRPs, each of these TRPs may transmit a separate uplink grant, and if the UE transmits one SR, the corresponding TRP that receives the SR may transmit an uplink grant to the UE. Additionally, the UE may subsequently transmit uplink data using the antenna subarray on which the UE transmitted the SR and the antenna subarray on which the uplink grant was received.

[0080] In other implementations, the UE may autonomously determine one or more TRP-antenna subarray pairs for transmitting uplink data, and transmit an indication of the determined TRP-antenna subarray pairs together with the SR. For example, the UE may transmit the indication to the first TRP, receive an uplink grant from the first TRP, or from the indicated TRP in the TRP-antenna subarray pair, and transmit uplink data to the determined TRP in the TRP-antenna subarray pair.

[0081] Various aspects of the present disclosure are initially described in the context of a wireless communication system. Additionally, various aspects of the present disclosure are illustrated by additional wireless communication systems, examples of SR operations, and process flow examples. Various aspects of the present disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow diagrams related to SR operations in connected mode DRX.

[0082] Figure 1 An example of a wireless communication system 100 supporting SR operation in CDRX mode according to various aspects of the present disclosure is illustrated. The wireless communication system 100 includes a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, or a new radio (NR) network. In some implementations, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low latency communications, or communications with low-cost and low-complexity devices.

[0083] The base station 105 may communicate wirelessly with the UE 115 via one or more base station antennas. The base station 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a Home Node B, a Home Evolved Node B, or some other suitable terminology. The wireless communication system 100 may include different types of base stations 105 (e.g., macro base stations or small cell base stations). The UE 115 described herein may be able to communicate with various types of base stations 105 and network equipment (including macro eNBs, small cell eNBs, gNBs, relay base stations, etc.).

[0084] Each base station 105 may be associated with a particular geographic coverage area 110 in which it supports communications with various UEs 115. Each base station 105 may provide communications coverage for the respective geographic coverage area 110 via a communication link 125, and the communication link 125 between the base station 105 and the UE 115 may utilize one or more carriers. The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.

[0085] The geographic coverage area 110 of the base station 105 may be divided into sectors that constitute a portion of the geographic coverage area 110, and each sector may be associated with a cellular cell. For example, each base station 105 may provide communication coverage for a macrocellular cell, a small cellular cell, a hotspot, or other types of cellular cells, or various combinations thereof. In some examples, the base station 105 may be mobile and therefore provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and the overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous LTE / LTE-A / LTE-A Pro or NR network, in which different types of base stations 105 provide coverage for various geographic coverage areas 110.

[0086] The term "cell" refers to a logical communication entity used to communicate with base station 105 (e.g., on a carrier), and may be associated with an identifier to distinguish adjacent cells operating via the same or different carriers (e.g., physical cell identifier (PCID), virtual cell identifier (VCID)). In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types that may provide access to different types of devices (e.g., machine type communication (MTC), narrowband Internet of Things (NB-IoT), enhanced mobile broadband (eMBB), or other protocol types). In some implementations, the term "cell" may refer to a portion (e.g., a sector) of a geographic coverage area 110 on which the logical entity operates.

[0087] Each UE 115 can be dispersed throughout the wireless communication system 100, and each UE 115 can be stationary or mobile. UE 115 can also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, wherein "device" can also be referred to as a unit, a station, a terminal, or a client. UE 115 can be a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 can also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, etc., which can be implemented in various items (such as electrical appliances, vehicles, meters, etc.).

[0088] 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 technology that allows devices to communicate with each other or with a base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay the information to a central server or application, which may utilize the information or present the information to a person interacting with the program or application. Some UEs 115 may be designed to collect information or implement automated behavior of machines. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, health care monitoring, field survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0089] Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication may be performed with a reduced peak rate. Other power saving techniques for UE 115 include entering a power-saving "deep sleep" mode when not engaged in active communications, or operating over limited bandwidth (e.g., in accordance with narrowband communications). In some implementations, UE 115 may be designed to support critical functions (e.g., mission-critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communications for these functions.

[0090] In some implementations, UE 115 may also be able to communicate directly with other UE 115 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol). One or more UEs in a group of UEs 115 utilizing D2D communication may be within a geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105, or may not be able to receive transmissions from the base station 105 for other reasons. In some implementations, groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to each other UE 115 in the group. In some implementations, the base station 105 facilitates the scheduling of resources for D2D communication. In other implementations, D2D communication is performed between UEs 115 without involving the base station 105.

[0091] Each base station 105 can communicate with the core network 130 and with each other. For example, the base station 105 can interface with the core network 130 via a backhaul link 132 (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) or indirectly (e.g., via the core network 130) on a backhaul link 134 (e.g., via X2, Xn, or other interfaces).

[0092] 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), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one packet data network (PDN) gateway (P-GW). The MME may manage non-access layer (e.g., control plane) functions such as mobility, authentication, and bearer management of UEs 115 served by base stations 105 associated with the EPC. User IP packets may be delivered through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation and other functions. The P-GW may be connected to network operator IP services. Operator IP services may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or packet switched (PS) streaming services.

[0093] At least some network devices (such as base stations 105) may include subcomponents, such as access network entities, which may be examples of access node controllers (ANCs). Each access network entity may communicate with each UE 115 through a number of other access network transport entities, which may be referred to as radio heads, smart radio heads, or TRPs. In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or merged into a single network device (e.g., base station 105).

[0094] The wireless communication system 100 can operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). In general, the 300 MHz to 3 GHz region is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths are in the range of from about 1 decimeter to 1 meter long. UHF waves can be blocked or redirected by buildings and environmental features. However, these waves can penetrate various structures sufficiently for macro cells to provide services to UEs 115 located indoors. Transmission of UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 km) compared to transmission using lower frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

[0095] The wireless communication system 100 may also operate in the Super High Frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as centimeter bands. The SHF region includes frequency bands that may be opportunistically used by devices that may be able to tolerate interference from other users, such as the 5 GHz Industrial, Scientific, and Medical (ISM) band.

[0096] The wireless communication system 100 may also operate in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), which is also referred to as the millimeter band. In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be even smaller and more closely spaced than the UHF antennas. In some implementations, this may facilitate the use of antenna arrays within the UE 115. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The technology disclosed herein may be adopted across transmissions using one or more different frequency divisions, and the use of frequency bands specified across these frequency divisions may vary by country or regulatory agency.

[0097] In some implementations, the wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as a 5 GHz ISM band). When operating in an unlicensed radio frequency spectrum band, wireless devices (such as base stations 105 and UE 115) may employ a listen-before-talk (LBT) procedure to ensure that the frequency channel is clear before transmitting data. In some implementations, operations in unlicensed bands may be based on carrier aggregation configurations (e.g., LAA) in coordination with component carriers operating in licensed bands. Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these transmissions. Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD), time division duplexing (TDD), or a combination of the two.

[0098] In some examples, 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, MIMO communication, or beamforming. For example, the wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., the base station 105) and a receiving device (e.g., the UE 115), wherein the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas. MIMO communication may employ multipath signal propagation to increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different antenna combinations. Similarly, the receiving device may receive multiple signals via different antennas or different antenna combinations. Each of these 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. Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0099] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or direct an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated via antenna elements of an antenna array so that signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements may include the transmitting device or the receiving device applying a particular amplitude and phase shift to the signal carried via each antenna element associated with the device. Adjustments 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).

[0100] In one example, the base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communication with the UE 115. For example, some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions, which may include a signal being transmitted according to different beamforming weight sets associated with different transmission directions. The transmissions in different beam directions may be used (e.g., by the base station 105 or a receiving device, such as the UE 115) to identify the beam direction used by the base station 105 for subsequent transmission / reception.

[0101] 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., a direction associated with a receiving device, such as UE 115). In some examples, a beam direction associated with transmissions along a single beam direction may be determined based at least in part on signals transmitted in different beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions, and UE 115 may report to base station 105 an indication of the signals received by it with the highest signal quality or other acceptable signal quality. Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction used by UE 115 for subsequent transmission or reception), or for transmitting signals in a single direction (e.g., for transmitting data to a receiving device).

[0102] A receiving device (e.g., UE 115, which may be an example of a mmW receiving device) may try multiple receive beams when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiving device may try multiple receive directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receive beamforming 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 beams or receive directions. In some examples, the receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal). The single receive beam may be aligned on a beam direction determined at least in part based on listening according to different receive beam directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio, or other acceptable signal quality based at least in part on listening according to multiple beam directions).

[0103] In some implementations, the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays that may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some implementations, the antennas or antenna arrays associated with a base station 105 may be located at different geographic locations. A base station 105 may have an antenna array having several rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with a UE 115. Likewise, a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.

[0104] In some implementations, the wireless communication system 100 may be a packet-based network that operates 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 to communicate on logical channels. The MAC layer may perform priority handling and multiplex logical channels into transport channels. The MAC layer may also use a hybrid automatic repeat request (HARQ) to provide retransmissions at the MAC layer, thereby improving link efficiency. In the control plane, the RRC protocol layer may provide the establishment, configuration, and maintenance of an RRC connection for a radio bearer that supports user plane data between the UE 115 and the base station 105 or the core network 130. At the physical layer (PHY), transport channels may be mapped to physical channels.

[0105] In some implementations, the UE 115 and the base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. HARQ feedback is a technique that increases the likelihood of correctly receiving data on the communication link 125. HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput of the MAC layer in poor radio conditions (e.g., signal-to-noise ratio conditions). In some implementations, the wireless device may support simultaneous slot HARQ feedback, where the device may provide HARQ feedback in a specific time slot for data received in a previous symbol in the time slot. In other implementations, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0106] The time interval in LTE or NR can be represented by a basic time unit (which may refer to a sampling period T, for example). s =1 / 30,720,000 seconds). The time intervals of the communication resources may be organized according to radio frames each having a duration of 10 milliseconds (ms), where the frame period may be expressed as T f =307,200T s. A radio frame may be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may be further divided into 2 time slots, each time slot having a duration of 0.5 ms, and each time slot may contain 6 or 7 modulation code element periods (e.g., depending on the length of a cyclic prefix prepended to each code element period). Excluding the cyclic prefix, each code element period may contain 2048 sampling periods. In some implementations, a subframe may be the minimum scheduling unit of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In other implementations, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI) or in a selected component carrier using sTTI).

[0107] In some wireless communication systems, a time slot may be further divided into a plurality of mini-slots containing one or more symbols. In some instances, a symbol of a mini-slot or a mini-slot may be the minimum scheduling unit. For example, each symbol may vary in duration depending on the subcarrier spacing or the operating frequency band. Further, some wireless communication systems may implement time slot aggregation, wherein a plurality of time slots or mini-slots are aggregated together and used for communication between UE 115 and base station 105.

[0108] The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications on the communication link 125. For example, a carrier of the communication link 125 may include a portion of a radio frequency spectrum band that operates according to a physical layer channel for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. A carrier may be associated with a predefined frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by a UE 115. A carrier may be downlink or uplink (e.g., in FDD mode), or configured to carry downlink communications and uplink communications (e.g., in TDD mode). In some examples, a 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)).

[0109] The organization structure of the carrier may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR). For example, communications on a carrier may be organized according to TTIs or time slots, each of which may include user data and control information or signaling to support decoding of the user data. A carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information) and control signaling to coordinate carrier operations. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling to coordinate the operations of other carriers.

[0110] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. In some examples, control information transmitted in a physical control channel may be distributed in a cascaded manner between different control regions (e.g., between a common control region or a common search space and one or more UE-specific control regions or UE-specific search spaces).

[0111] A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of several predetermined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) of a carrier for a particular radio access technology. In some examples, each served UE 115 may be configured to operate on part or all of the carrier bandwidth. In other examples, some UEs 115 may be configured to operate using a narrowband protocol type associated with a predefined portion or range (e.g., a set of subcarriers or RBs) within a carrier (e.g., an "in-band" deployment of a narrowband protocol type).

[0112] In a system using MCM technology, a resource element may include a symbol period (e.g., the duration of a modulation symbol) and a 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). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. In a MIMO system, wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and space resources (e.g., space layers), and the use of multiple space layers may further increase the data rate of communication with UE 115.

[0113] A device (e.g., base station 105 or UE 115) of wireless communication system 100 may have a hardware configuration that supports communication on a specific carrier bandwidth, or may be configurable to support communication on one carrier bandwidth in a carrier bandwidth set. In some examples, wireless communication system 100 may include base station 105, UE 115, or a combination thereof that supports simultaneous communication via carriers associated with more than one different carrier bandwidths.

[0114] The wireless communication system 100 may support communication with the UE 115 on multiple cells or carriers, a feature that may be referred to as carrier aggregation or multi-carrier operation. The UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both FDD and TDD component carriers.

[0115] In some implementations, the wireless communication system 100 may utilize an enhanced component carrier (eCC). An eCC may be characterized by one or more features including a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some implementations, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). An eCC may also be configured to be used in an unlicensed spectrum or a shared spectrum (e.g., where more than one operator is allowed to use the spectrum). An eCC characterized by a wide carrier bandwidth may include one or more segments that may be utilized by a UE 115 that is not capable of monitoring the entire carrier bandwidth or is otherwise configured to use a limited carrier bandwidth (e.g., to save power).

[0116] In some implementations, an eCC may utilize a different symbol duration than other component carriers, which may include using a reduced symbol duration compared to the symbol duration of other component carriers. A shorter symbol duration may be associated with an increased spacing between adjacent subcarriers. A device utilizing an eCC (such as a UE 115 or a base station 105) may transmit a wideband signal (e.g., based on a frequency channel or carrier bandwidth of 20, 40, 60, or 80 MHz) with a reduced symbol duration (e.g., 16.67 microseconds). A TTI in an eCC may include one or more symbol periods. In some implementations, the TTI duration (i.e., the number of symbol periods in a TTI) may be variable.

[0117] The wireless communication system 100 may be an NR system that may utilize any combination of licensed, shared, and unlicensed spectrum bands, etc. The flexibility of eCC symbol duration and subcarrier spacing may allow eCC to be used across multiple spectrums. In some examples, NR shared spectrum may improve spectrum utilization and spectrum efficiency, particularly through dynamic vertical (e.g., across frequency domain) and horizontal (e.g., across time domain) sharing of resources.

[0118] To save battery power, the UE 115 can utilize a DRX cycle when communicating with the base station 105, which includes periodic turning on and off of the receiver, for example, in alternating active and inactive states. The DRX cycle can be configured so that the UE 115 does not have to decode the physical downlink control channel (PDCCH) or receive physical downlink shared channel (PDSCH) transmissions in certain subframes. In some implementations, the UE 115 can continuously monitor the communication link 125 to find an indication that the UE 115 can receive data. In other implementations (e.g., to save power and extend battery life), the UE 115 can be configured with a DRX cycle.

[0119] The DRX cycle may include an on-duration that the UE 115 may monitor to find control information (e.g., on the PDCCH) and a DRX period during which the UE 115 may power down certain radio components. In some implementations, the UE 115 may be configured with a short DRX cycle and a long DRX cycle. For example, the UE 115 may enter a long DRX cycle when the UE is inactive for one or more short DRX cycles. The transition between the short DRX cycle, the long DRX cycle, and the continuous reception may be controlled by an internal timer or by the transmission and reception of messages from the base station 105. In some implementations, the UE 115 may receive a scheduling message on the PDCCH during the on-duration. While monitoring the PDCCH to find the scheduling message, the UE 115 may initiate a DRX inactivity timer. If the scheduling message is successfully received, the UE 115 may be ready to receive data and the DRX inactivity timer may be reset. When the DRX inactivity timer expires without receiving a scheduling message, the UE 115 may move to a short DRX cycle and may start a DRX short cycle timer. When the DRX short cycle timer expires, the UE 115 may resume the long DRX cycle.

[0120] In some implementations, the DRX cycle may include a CDRX mode, in which the UE 115 remains connected to the base station 105 during both the on duration (e.g., wake duration) and the DRX period (e.g., sleep period). The CDRX mode may allow the UE 115 to switch between a sleep state and a wake state (e.g., a DRX period and an on duration, or a sleep mode and a wake mode, respectively) without a signal. The base station 105 may schedule transmissions during the active time (e.g., wake state or on duration). In addition, the UE 115 may monitor a control channel (such as PDCCH) during the active time (i.e., wake up or wake up to monitor the control channel). In some implementations, the active time may include the time when the on duration timer is running, the time when the inactive timer is running, the time when the SR is pending, or a combination thereof. The UE 115 may sleep when it is not in the active time to save battery power.

[0121] Additionally or alternatively, the UE 115 may enter an active time when it detects that uplink data is to be transmitted to the base station 105. During the active time, the UE 115 may perform an SR operation to request resources and configuration information for subsequent transmission of uplink data. For example, the SR operation may include: the UE transmits an SR (e.g., via an uplink control channel, such as a physical uplink control channel (PUCCH)) to the base station 105, the base station 105 transmits an uplink grant (e.g., via a downlink control channel, such as a PDCCH) to the UE 115, and the UE 115 transmits uplink data on resources as indicated in the uplink grant (e.g., via a separate uplink channel, such as a physical uplink shared channel (PUSCH)). Based on performing the SR operation in a single active time of the CDRX mode, the UE 115 can additionally save power.

[0122] Conventionally, a UE 115 may communicate with a single base station 105 via a single antenna subarray for CDRX mode, thereby reducing any complexity in determining which base station 105 to transmit an SR to when uplink data is detected. However, as described herein, a UE 115 may include multiple antenna subarrays for concurrently communicating with multiple TRPs, wherein each antenna subarray includes multiple antenna elements that may be used for beamforming communications, transmit diversity, receive diversity, or MIMO communications from the antenna subarray and the UE 115. In some implementations, the UE 115 may use separate antenna subarrays for communications with the TRPs based on, for example, the corresponding orientation of the antenna subarrays on the UE or the physical location of the antenna subarrays. For example, the UE 115 may communicate with a first base station 105 via a first antenna subarray, communicate with a second base station 105 via a second antenna subarray, communicate with a third base station 105 via a third antenna subarray, and so on.

[0123] Additionally or alternatively, the UE 115 may communicate with multiple TRPs, which may be separate base stations 105, separate antenna arrays within a base station 105, separate radio heads of a base station 105, or a combination thereof, wherein each TRP is associated with a corresponding antenna subarray (e.g., thereby generating a TRP-antenna subarray pair). As such, in the event that multiple TRPs are configured for communication (e.g., the multiple TRPs may be considered a multi-TRP cluster), the UE 115 may be uncertain as to which TRP to transmit the SR to and which antenna subarray to use to transmit the SR to initiate an SR operation, which TRP and antenna subarray to use to receive an uplink grant, and which TRP and antenna subarray to use to transmit subsequent uplink data.

[0124] The wireless communication system 100 may support efficient techniques for determining which TRPs and antenna subarrays to use for SR operations during CDRX mode when multiple TRPs are configured for simultaneous communications with a UE 115. For example, a first TRP (i.e., a first TRP among multiple TRPs connected to the UE 115) may transmit configuration information regarding which antenna subarrays the UE 115 is to use when transmitting an SR (and which TRPs the SR is to be transmitted to), which TRPs are to be used for receiving uplink grants (and on which antenna subarrays the uplink grants are to be received), and which antenna subarrays are to be used when transmitting uplink data (and to which TRPs the uplink data is to be transmitted to), or a combination thereof. Based on the configuration information, the UE 115 may use each corresponding antenna subarray located on the UE 115 to perform SR operations with multiple TRPs, use one corresponding antenna subarray (e.g., the one antenna subarray may be dynamically or semi-statically selected) to perform SR operations with a single TRP, or use a corresponding subset of antenna subarrays to perform SR operations with a subset of TRPs. Additionally or alternatively, UE 115 may autonomously determine one or more TRP-antenna subarray pairs for transmitting uplink data and transmit an indication of the determined TRP-antenna subarray pairs together with the SR. For example, UE 115 may transmit the indication to the first TRP, receive an uplink grant from the first TRP (or from each TRP indicated in the TRP-antenna subarray pair), and transmit uplink data to the determined TRP in the TRP-antenna subarray pair.

[0125] Figure 2 An example of a communication system 200 that supports SR operation in CDRX mode according to aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. The wireless communication system 200 can include TRP 105-a and TRP 105-b, which can be as described above with reference to Figure 1An example of two base stations 105 described. In some implementations, each TRP 105 can be a separate antenna array for a base station 105, a separate radio head for a base station 105, or a similar device for accessing a network. Additionally, TRP 105-a and TRP 105-b can be connected via a backhaul link 134-a, thereby enabling the two TRPs 105 to communicate directly with each other. In some implementations, TRP 105-a and TRP 105-b can be part of a multi-TRP cluster of multiple TRPs 105, and UE 115-a is configured to communicate with the multiple TRPs 105 (e.g., as an extension, there may be more than two TRPs 105 with which UE 115-a can communicate, and such TRPs 105 can be associated with one, two, or more base stations). The wireless communication system 200 may also include UE 115-a, which may be as described above with reference to Figure 1 An example corresponding to UE 115 is described.

[0126] As described herein, UE 115-a may include multiple antenna subarrays 205 for concurrently communicating with each TRP 105, wherein each antenna subarray 205 includes multiple antenna elements 210. For example, UE 115-a may communicate with TRP 105-a via antenna subarray 205-a and communicate with TRP 105-b via antenna subarray 205-b, wherein TRP 105-a and antenna subarray 205-a may constitute a first TRP-antenna subarray pair and TRP 105-b and antenna subarray 205-b may constitute a second TRP-antenna subarray pair. Additionally, the UE 115-a may use the antenna elements 210 of each antenna subarray 205 to steer and form a corresponding beam 215 for communication with each TRP 105, wherein beam 215-a is used for communication with TRP 105-a and beam 215-b is used for communication with TRP 105-b. Each TRP 105 may also use a corresponding beam 220 for their respective communications with the UE 115-a, wherein TRP 105-a may use beam 220-a for communication with UE 115-a, and TRP 105-b may use beam 220-b for communication with UE 115-a. In some implementations, each beam 215 and 220 may be used for both transmitting and receiving information for UE 115-a and TRPs 105-a and 105-b, respectively. Additionally or alternatively, at each wireless device (e.g., UE 115-a or TRP 105-a or TRP 105-b), a first beam may be used to transmit information or data, while a second separate beam may be used to receive information.

[0127] In some implementations, the UE 115-a may communicate with two TRPs 105 according to a CDRX mode, wherein the UE 115-a monitors downlink communications from one or both TRPs 105 during an awake state of the CDRX mode. However, when the UE 115-a includes multiple antenna subarrays 205 for communicating with multiple TRPs 105, uplink communications from the UE 115-a for the CDRX mode may include uncertainty as to which antenna subarray 205 to use to perform SR operations or with which TRP 105 to perform SR operations. The SR operation may include: UE 115-a transmitting SR 230 to one or more TRPs 105 via an uplink channel (e.g., PUCCH), one or more TRPs 105 transmitting an uplink grant to UE 115-a via a downlink channel (e.g., PDCCH), and UE 115-a transmitting uplink data via a separate uplink channel (e.g., PUSCH) on resources as indicated in the uplink grant.

[0128] In some implementations, to alleviate uncertainty, TRP 105-a (or a separate TRP 105 operating as an anchor TRP) may transmit a configuration 225 to inform UE 115-a which TRP(s) 105 or antenna subarray 205 are to be used to transmit SR230, the corresponding PDCCH, and the corresponding PUSCH. Based on the configuration 225, the UE 115-a may transmit the SR 230 to the corresponding TRPs 105 using each antenna subarray 205 (i.e., each antenna subarray 205 located on the UE 115-a) (e.g., to TRP 105-a on antenna subarray 205-a and to TRP 105-b on antenna subarray 205-b), transmit the SR 230 to the corresponding TRP 105 on one antenna subarray 205 (e.g., to TRP 105-a on antenna subarray 205-a), or transmit the SR 230 to the corresponding TRP 105 on a subset of multiple antenna subarrays 205 of the UE 115-a. The corresponding TRPs 105, the corresponding TRPs 105, or the subset of the TRPs 105 may then transmit an uplink grant to the UE 115-a based on receiving the SR 230. Additionally, UE 115 - a may then transmit uplink data using the antenna subarray 205 used to transmit SR 230 and using the antenna subarray 205 used to receive uplink grants.

[0129] In other implementations, to alleviate the uncertainty, the UE 115-a may autonomously determine which TRP-antenna subarray pairs are suitable for SR operation (e.g., TRP 105 suitable for transmitting uplink grants on the PDCCH and antenna subarray 205 suitable for transmitting uplink data on the PUSCH), and transmit the determination in the SR 230. In some implementations, the UE 115-a may determine the TRP-antenna subarray pairs based on the measured channel quality for each TRP 105. For example, the UE 115-a may use the first TRP-antenna subarray link (i.e., the first TRP-antenna subarray pair between antenna subarray 205-a and TRP 105-a) for transmission of SR 230, for transmission of uplink grants (e.g., on the PDCCH), or for transmission of both SR 230 and uplink grants (which supports power saving purposes at the UE 115-a). Antenna subarray 205-a may be an anchor antenna subarray (e.g., a primary antenna subarray) for UE 115-a. In some implementations, during off-duration cycles of the CDRX mode (such as DRX periods and sleep periods), UE 115-a may have more information about the channel than any TRP 105, which may increase the chances of SR operation based on this more accurate information.

[0130] After receiving an uplink grant from a first TRP-antenna subarray link (e.g., from TRP 105-a), UE115-a may transmit uplink data to any TRP 105 determined with a suitable TRP-antenna subarray pair. Additionally or alternatively, TRP 105-a may share information about suitable TRP-antenna subarray pairs with TRP 105-b (or other TRP 105) via backhaul link 134-a, and TRP 105-b (or other TRP 105) may also transmit an uplink grant to UE 115-a. In some implementations, the information shared across backhaul link 134-a may include scheduling information about incoming uplink data. For example, the scheduling information may further include information about beam 220-b at TRP 105-b for receiving uplink data from UE 115-a.

[0131] As described above, communications between UE 115-a and TRPs 105-a and 105-b (which may include downlink communications 235 and uplink communications 240) may occur according to a CDRX mode. Additionally, each of downlink communications 235 and uplink communications 240 may include one or more DRX cycles 245 having an on duration 250 and followed by a sleep period (e.g., an inactive period, a DRX period, an off duration, or a sleep state) for the remainder of the DRX cycle 245 not occupied by active time 255. For example, active time 255 may occur during on duration 250 (e.g., active time 255-a corresponds to on duration 250-a, active time 255-c corresponds to on duration 250-c, etc.) or may occur for a longer time than on duration 250 (such as active time 255-b is longer than on duration 250-b). In downlink communication 235, UE 115-a may receive grant 260-a (e.g., on the PDCCH to seek a downlink grant for receiving subsequent downlink information), wherein receiving grant 260-a initiates inactivity timer 265. UE 115-a may remain awake until inactivity timer 265 expires (e.g., extending active time 255-b beyond the end of on duration 250-b), and may then return to a dormant state once inactivity timer 265 expires.

[0132] Similarly, in uplink communication 240, active time 255 may correspond to the on duration 250 of the CDRX mode (e.g., active times 255-d, 255-f, and 255-g may last for the same time span as on durations 250-a, 250-b, and 250-c, respectively). On duration 250 in uplink communication 240 may correspond to the on duration 250 of downlink communication 235 (i.e., the on duration 250 of the CDRX mode is configured for uplink or downlink communication). However, in uplink communication 240, if UE 115-a detects that uplink data is to be transmitted to TRP 105, UE 115-a may wake up and transmit SR 270 (e.g., SR 230), which may start active time 255-e outside of on duration 250. Active time 255-e may include a period for pending SR 275, where UE 115-a is waiting for grant 260-b (e.g., an uplink grant based on SR 270) from TRP 105. After receiving grant 260-b (e.g., a PDCCH carrying an uplink grant), UE 115-a may start an inactivity timer 265 and return to a dormant state once the inactivity timer expires if no further signaling is received from TRP 105.

[0133] As described herein, UE 115-a may perform SR operations with one or more TRPs 105 during active time 255 of uplink communication 240 based on configuration 225 or based on indicating an appropriate TRP-antenna subarray pair in SR 230 (e.g., SR 270). For example, UE 115-a may transmit SR 230 to the indicated TRP(s) 105 (e.g., from configuration 225) or to TRP 105-a (e.g., when autonomously determining the TRP-antenna subarray pair), receive an uplink grant (e.g., grant 260-b) from one or more of the TRPs 105, and then transmit uplink data to one or more TRPs 105.

[0134] Figure 3 An example of SR operation 300 in CDRX mode according to aspects of the present disclosure is illustrated. In some examples, SR operation 300 can implement aspects of wireless communication systems 100 and 200. SR operation 300 may include TRP 105-c and TRP 105-d, which may be as described above with reference to Figure 1 and Figure 2 105 or base station 105 described herein. Additionally, TRP 105-c and TRP 105-d may be connected via backhaul link 134-b, thereby enabling the two TRPs 105 to communicate directly with each other. In some implementations, TRP 105-c and TRP 105-d may be part of a multi-TRP cluster of multiple TRPs 105 with which UE 115-b is configured to communicate (e.g., there may be more than two TRPs 105 with which UE 115-b may communicate). SR operations 300 may also include UE 115-b, which may be as described above with reference to Figure 1 and Figure 2 An example corresponding to UE 115 is described.

[0135] As described herein, UE 115-b may include multiple antenna subarrays for concurrently communicating with each TRP 105, wherein each antenna subarray includes multiple antenna elements. For example, UE 115-b may communicate with TRP 105-c via a first antenna subarray and communicate with TRP 105-d via a second antenna subarray, wherein TRP 105-c and the first antenna subarray may constitute a first TRP-antenna subarray pair and TRP 105-d and the second antenna subarray may constitute a second TRP-antenna subarray pair. Additionally, UE 115-b may use the antenna elements of each antenna subarray to direct and form a corresponding beam 305 for communication with each TRP 105, wherein beam 305-a is used for communication with TRP 105-c and beam 305-b is used for communication with TRP 105-d. Each TRP 105 may also use a corresponding beam 310 for their respective communications with UE 115-b, where TRP 105-c may use beam 310-a for communicating with UE 115-b, and TRP 105-d may use beam 310-b for communicating with UE 115-b. In some implementations, each beam 305 and 310 may be used for both transmitting and receiving information for UE 115-b and TRPs 105-c and 105-d, respectively. Additionally or alternatively, at each wireless device (e.g., UE 115-b or TRP 105-c or TRP 105-d), a first beam may be used to transmit information or data, while a second separate beam may be used to receive information.

[0136] In some implementations, a TRP 105-c (e.g., an anchor TRP) may transmit a configuration 315 to a UE 115-b that informs the UE 115-b which TRPs 105 or antenna subarrays are to be used to transmit the SR 320, the corresponding PDCCH for receiving uplink grants 325, and the corresponding PUSCH for transmitting uplink data 330. As shown, the configuration 315 may indicate that all subarrays of the UE 115-b are to transmit the SR 320 simultaneously on the PUCCH (e.g., an uplink channel). Each associated TRP 105 (e.g., as part of a corresponding TRP-antenna subarray pair) may need to monitor a corresponding PUCCH from the UE 115-b. For example, the UE 115-b may transmit the SR 320-a to the TRP 105-c and transmit the SR 320-b to the TRP 105-d. Subsequently, each TRP 105 (e.g., in a multi-TRP cluster) may then transmit a separate PDCCH for uplink grant 325. For example, TRP 105-c may transmit uplink grant 325-a to UE 115-b, and TRP 105-d may transmit a separate uplink grant 325-b to UE 115-b. In some implementations, even if UE 115-b transmits SR 320 on each antenna subarray, not every corresponding TRP 105 may receive SR 320, and a TRP 105 that does not receive SR 320 may not transmit a corresponding uplink grant 325, while a TRP 105 that receives SR 320 may transmit a corresponding uplink grant 325.

[0137] UE 115-b may use all antenna subarrays associated with each TRP 105 (e.g., in a multi-TRP cluster) to transmit uplink data 330 via a separate PUSCH. For example, UE 115-b may transmit uplink data 330-a to TRP 105-c and may transmit uplink data 330-b to TRP 105-d. Using all antenna subarrays of UE 115-b and all TRPs 105 of a multi-TRP cluster to perform SR operations may improve the reliability of receiving uplink grants 325 for transmitting subsequent uplink data 330. However, using all antenna subarrays may increase power consumption at UE 115-b, reducing battery power and battery life.

[0138] Figure 4 An example of SR operation 400 in CDRX mode according to aspects of the present disclosure is illustrated. In some examples, SR operation 400 can implement aspects of wireless communication systems 100 and 200. SR operation 400 may include TRP 105-e and TRP 105-f, which may be as described above with reference to Figure 1-3105 or base station 105 described herein. Additionally, TRP 105-e and TRP 105-f may be connected via backhaul link 134-c, thereby enabling the two TRPs 105 to communicate directly with each other. In some implementations, TRP 105-e and TRP 105-f may be part of a multi-TRP cluster of multiple TRPs 105, and UE 115-c may be configured to communicate with the multiple TRPs 105 (e.g., there may be more than two TRPs 105 with which UE 115-c may communicate, and the two or more TRPs 105 may be associated with one, two, or more base stations). SR operation 400 may also include UE 115-c, which may be as described above with reference to Figure 1-3 An example corresponding to UE 115 is described.

[0139] As described herein, UE 115-c may include multiple antenna subarrays for concurrently communicating with each TRP 105, wherein each antenna subarray includes multiple antenna elements. For example, UE 115-c may communicate with TRP 105-e via a first antenna subarray and communicate with TRP 105-f via a second antenna subarray, wherein TRP 105-e and the first antenna subarray may constitute a first TRP-antenna subarray pair and TRP 105-f and the second antenna subarray may constitute a second TRP-antenna subarray pair. Additionally, UE 115-c may use the antenna elements of each antenna subarray to direct and form a corresponding beam 405 for communication with each TRP 105, wherein beam 405 is used for communication with TRP 105-f. Each TRP 105 may also use a corresponding beam 410 for their respective communications with UE 115-c, where TRP 105-f may use beam 410 for communicating with UE 115-c. In some implementations, each beam 405 and 410 may be used for both transmitting and receiving information for UE 115-c and TRPs 105-e and 105-f, respectively. Additionally or alternatively, at each wireless device (e.g., UE 115-c or TRP 105-e or TRP 105-f), a first beam may be used to transmit information or data, while a second separate beam may be used to receive information.

[0140] In some implementations, a TRP 105-e (e.g., an anchor TRP) may transmit a configuration 415 to a UE 115-c that informs the UE 115-c which TRPs 105 or antenna subarrays to use to transmit the SR 420, the corresponding PDCCH for receiving an uplink grant 425, and the corresponding PUSCH for transmitting uplink data 430. As shown, one antenna subarray (or a subset of antenna subarrays) of the UE 115-c may transmit the SR 420 to the TRP 105-f on the PUCCH. In some implementations, the TRP 105-e may semi-statically select an antenna subarray and indicate the selected antenna subarray in the configuration 415. For example, the TRP 105-e may indicate the selected antenna subarray via RRC signaling, MAC-CE, DCI message, or a combination thereof. In some implementations, the TRP 105-e may select an antenna subarray based on information previously received or indicated from the UE 115-c. The selected antenna subarray may be an anchor antenna subarray (e.g., a primary antenna subarray) of the UE 115-c. Based on the anchor antenna subarray, any predefined TRP 105 associated with the anchor antenna subarray(s) need to monitor the PDCCH carrying the SR 420.

[0141] Additionally or alternatively, the UE 115-c may dynamically select an antenna subarray (or a subset of antenna subarrays) without an indication from the TRP 105-e (e.g., without the configuration 415). The UE 115-c may indicate the selected antenna subarray(s) to the associated TRP 105 in the PUCCH carrying the SR 420, where the associated TRP(s) 105 need to monitor the PUCCH. However, in some implementations, the UE 115-c may not indicate the selected antenna subarray because all TRPs 105 (i.e., including the associated TRP) (e.g., a multi-TRP cluster) with which the UE 115-c is configured to communicate may need to monitor the SR 420, which may eliminate the need to signal the indication in the case where these TRPs 105 are already monitoring the SR 420. By using one antenna subarray (or a subset of antenna subarrays), the UE 115-c may save power instead of using each antenna subarray to transmit the SR 420.

[0142] Based on transmitting the SR 420 to one selected TRP 105 (or a subset of TRPs 105), the TRP 105 that detected the SR 420 on the PUCCH may subsequently transmit a PDCCH for an uplink grant 425. For example, TRP 105-f may receive the SR 420 and subsequently transmit an uplink grant 425 to UE 115-c based on receiving the SR 420. Additionally or alternatively, even if UE 115-c transmits the SR 420 using one antenna subarray (or a subset of antenna subarrays), each TRP 105 in the TRP multi-cluster (or a greater number of TRPs 105 from the TRP multi-cluster than the TRP to which UE 115-c transmits the SR 420) may transmit an uplink grant 425 to UE 115-c. In some implementations, the TRP 105 that transmits the uplink grant 425 without receiving the SR 420 may determine to transmit the uplink grant 425 based on information communicated over the backhaul link 134-c from the TRP(s) 105 that received the SR 420. The UE 115-c may then use any antenna subarray associated with the TRP 105 that sent the PDCCH to transmit the uplink data 430 via the PUSCH. For example, based on receiving the uplink grant 425 from the TRP 105-f, the UE 115-c may use the corresponding antenna subarray to transmit the uplink data 430 to the TRP 105-f.

[0143] Figure 5 An example of SR operation 500 in CDRX mode according to aspects of the present disclosure is illustrated. In some examples, SR operation 500 can implement aspects of wireless communication systems 100 and 200. SR operation 500 may include TRP 105-g and TRP 105-h, which may be as described above with reference to Figure 1-4 105 or base station 105 described herein. Additionally, TRP 105-g and TRP 105-h may be connected via backhaul link 134-d, thereby enabling the two TRPs 105 to communicate directly with each other. In some implementations, TRP 105-g and TRP 105-h may be part of a multi-TRP cluster of multiple TRPs 105 with which UE 115-d is configured to communicate (e.g., there may be more than two TRPs 105 with which UE 115-d may communicate). SR operations 500 may also include UE 115-d, which may be as described above with reference to Figure 1-4 An example corresponding to UE 115 is described.

[0144] As described herein, UE 115-d may include multiple antenna subarrays for concurrently communicating with each TRP 105, wherein each antenna subarray includes multiple antenna elements. For example, UE 115-d may communicate with TRP 105-g via a first antenna subarray and communicate with TRP 105-h via a second antenna subarray, wherein TRP 105-g and the first antenna subarray may constitute a first TRP-antenna subarray pair and TRP 105-h and the second antenna subarray may constitute a second TRP-antenna subarray pair. Additionally, UE 115-d may use the antenna elements of each antenna subarray to direct and form a corresponding beam 505 for communication with each TRP 105, wherein beam 505-a is used for communication with TRP 105-g and beam 505-b is used for communication with TRP 105-h. Each TRP 105 may also use a corresponding beam 510 for their respective communications with UE 115-d, where TRP 105-g may use beam 510-a for communications with UE 115-d, and TRP 105-h may use beam 510-b for communications with UE 115-d. In some implementations, each beam 505 and 510 may be used for both transmitting and receiving information for UE 115-d and TRPs 105-g and 105-h, respectively. Additionally or alternatively, at each wireless device (e.g., UE 115-d or TRP 105-g or TRP 105-h), a first beam may be used to transmit information or data, while a second separate beam may be used to receive information.

[0145] In some implementations, UE 115-d may use one TRP-antenna subarray link (i.e., a first TRP-antenna subarray pair, where the first TRP-antenna subarray pair includes an anchor TRP) for SR 515 transmission, PDCCH transmission carrying uplink grant 520, or a combination thereof based on autonomous selection of UE 115-d. Additionally or alternatively, UE 115-d may use more than one TRP-antenna subarray link for SR 515 transmission and uplink grant 520 transmission / reception. In some implementations, UE 115-d may determine one or more TRP-antenna subarray links based on the channel quality of each TRP in a multi-TRP cluster. UE 115-d may transmit information about TRP-antenna subarray link(s) suitable (e.g., preferred) for PDCCH and PUSCH transmission when transmitting SR 515. That is, the SR 515 may include information about which TRP-subarray pair(s) are applicable for SR operations (e.g., PDCCH transmission of uplink grant 520 and PUSCH transmission(s) of uplink data 530). In some implementations, the UE 115-d may indicate in the transmission of the SR 515 one or more TRPs 105 for subsequent SR operation transmissions. The indication may be included in the SR 515 via an additional bit within the SR 515. During the OFF duration when operating in CDRX mode, the UE 115-d may have more information about the channels used for communication between the UE 115-d and the TRP 105, which may increase the accuracy of which TRP-antenna subarray pair(s) are selected for subsequent SR operation transmissions after transmitting the SR 515.

[0146] One or more TRPs 105 may then transmit a PDCCH for an uplink grant 520. For example, TRP 105-g may transmit an uplink grant 520 based on information received from UE 115-d with SR 515 and as part of a TRP-antenna subarray pair used for transmission of SR 515. Additionally or alternatively, multiple TRPs 105 (e.g., TRP 105-g and TRP 105-h) may transmit an uplink grant 520 based on information received with SR 515. For example, TRP 105-g may transmit scheduling information 525 to TRP 105-h via backhaul link 134-d, wherein scheduling information 525 includes information about the selected TRP-antenna subarray pair(s) as indicated in SR 515. Additionally, the scheduling information 525 may include information about uplink receive beams that other TRPs 105 may use to receive uplink data 530 from UE 115-d. In some implementations, the uplink grant 520 may include a DCI message or a MAC CE that indicates configuration information about other TRPs 105 to use for transmission of uplink data 530 (e.g., configuration information identified by TRP 105-g based on the selected TRP-antenna subarray pair information in SR 515). Subsequently, UE 115-d may then transmit the uplink data 530 to the TRP 105 from the selected TRP-antenna subarray pair(s) via the PUSCH. For example, UE 115-d may transmit uplink data 530-a to TRP 105-g and uplink data 530-b to TRP 105-h. In some implementations, dynamic TRP selection or simultaneous transmission to TRPs 105 may be possible for uplink data 530 transmission.

[0147] Additionally, in some implementations, a configuration message (eg, similar to the above, respectively, Figure 3 and Figure 4The described configuration 315 or 415) can be transmitted by a TRP 105 (e.g., TRP 105-g or anchor TRP 105) to UE 115-d. The configuration message can inform UE 115-d how to transmit SR 515 (e.g., using corresponding antenna subarrays to transmit to all associated TRPs 105, using (s) dynamically selected antenna subarrays to transmit to at least one TRP 105, or using (s) semi-statically selected antenna subarrays to transmit to at least one TRP 105). In these implementations, UE 115-d may still select an appropriate TRP-antenna subarray pair for transmitting SR 515 and for performing the remainder of the SR operation, but may use the configuration message to determine other configuration information for transmitting SR 515 and the remainder of the SR operation (e.g., information about channels (such as PDCCH and PUSCH) used to receive and transmit different messages for the SR operation).

[0148] Figure 6 An example of a process flow 600 for supporting SR operation in CDRX mode according to aspects of the present disclosure is illustrated. In some examples, the process flow 600 can implement aspects of wireless communication systems 100 and 200. The process flow 600 may include TRPs 105-i and 105-j, which may be as described above with reference to Figure 1-5 105 or base stations 105. In some implementations, each TRP 105 may be a separate antenna array of a base station 105, a separate radio head of a base station 105, or a similar device for accessing a network. In some implementations, TRP 105-a and TRP 105-b may be part of a multi-TRP cluster of multiple TRPs 105 with which UE 115-e is configured to communicate (e.g., there may be more than two TRPs 105 with which UE 115-e may communicate). Process flow 600 may also include UE 115-e, which may be as described above with reference to Figure 1-5 An example corresponding to UE 115 is described.

[0149] In the following description of process flow 600, operations between UE 115-e, TRP 105-i, and TRP 105-j may be performed in a different order or at different times. Certain operations may also be excluded from process flow 600, or other operations may be added to process flow 600. Although UE 115-e, TRP 105-i, and TRP 105-j are shown as performing the operations of process flow 600, any wireless device may perform the operations shown.

[0150] At 605, the UE 115-e may receive (e.g., from the TRP 105-i) a configuration indicating its own set of antenna subarrays (e.g., antenna panels), or a set of TRPs, or a combination thereof for the UE 115-e to use to communicate (e.g., perform SR operations) when operating in a DRX mode (e.g., a CDRX mode). In some implementations, the UE 115-e may receive the configuration in RRC signaling, or a DCI message, or a MAC-CE, or a combination thereof. Additionally, the TRP 105-i may identify an anchor TRP in the set of TRPs (e.g., itself, or another TRP (such as TRP 105-j)), where the anchor TRP monitors SRs from the UE 115-e.

[0151] At 610 , the UE 115 - e may select at least one antenna subarray from its own set of antenna subarrays for transmitting SR, or receiving uplink grants, or transmitting uplink data, or a combination thereof (eg, for SR operation).

[0152] At 615, the UE 115-e may transmit the SR based on the received configuration when operating in DRX mode. In some implementations, the UE 115-e may transmit the SR to multiple TRPs using its own multiple antenna subarrays, wherein the set of TRPs with which the UE 115-e communicates includes the multiple TRPs and the set of antenna subarrays of the UE 115-e includes the multiple antenna subarrays. Additionally or alternatively, the UE 115-e may transmit the SR using the set of antenna subarrays indicated by the received configuration or the set of antenna subarrays including a subset of the multiple antenna subarrays of the UE 115-e. In some implementations, the UE 115-e may transmit the SR to a first TRP in the set of TRPs (e.g., TRP 105-i), to a second TRP in the set of TRPs (e.g., TRP 105-j), and to additional TRPs in the set of TRPs. Additionally, the UE 115-e may transmit the SR on an uplink control channel (e.g., PUCCH). In some implementations, UE 115 - e may transmit the SR to the anchor TRP identified in 605 .

[0153] At 620, the UE 115-e may receive an uplink grant in response to the transmitted SR. In some implementations, the UE 115-e may receive an uplink grant for a first TRP (e.g., TRP 105-i) in the TRP set in response to the transmitted SR, and may receive an uplink grant for a second TRP from a second TRP in the TRP set in response to the transmitted SR. Additionally or alternatively, the TRP set may include multiple TRPs (e.g., a multi-TRP cluster), and the UE 115-e may receive an uplink grant for each TRP from each TRP in the multiple TRPs in response to the transmitted SR. In some implementations, the UE 115-e may transmit an SR to a first TRP (e.g., TRP 105-i) in the TRP set, and may receive an uplink grant from the first TRP in response to the transmitted SR. Additionally, UE 115-e may receive an uplink grant on a downlink control channel (e.g., PDCCH). In some implementations, the TRP may determine to refrain from transmitting an uplink grant (e.g., via a second TRP) based on determining that the TRP failed to receive a second SR (e.g., via a second TRP in the TRP set).

[0154] At 625, the UE 115-e may identify that one or more TRPs in the set of TRPs have transmitted an uplink grant in response to the transmitted SR.

[0155] At 630, the UE 115-e may transmit uplink data based on the received uplink grant and the received configuration. In some implementations, the TRP set may include multiple TRPs, and the UE 115-e may transmit uplink data to each of the multiple TRPs. Additionally or alternatively, the UE 115-e may transmit uplink data to one or more TRPs identified at 625. In some implementations, the UE 115-e may transmit the uplink data on an uplink shared channel (e.g., PUSCH). After transmission of the uplink data, the UE 115-e may return to an off state (sleep state) of the DRX cycle until the next on duration or until the UE 115-e identifies uplink data to be sent and transmits another SR.

[0156] Figure 7 An example of a process flow 700 for supporting SR operation in CDRX mode according to aspects of the present disclosure is illustrated. In some examples, the process flow 700 can implement aspects of the wireless communication systems 100 and 200. The process flow 700 may include TRP 105-k and TRP 105-1, which may be as described above with reference to Figure 1-6105 or base stations 105. In some implementations, each TRP 105 may be a separate antenna array for a base station 105, a separate radio head for a base station 105, or a similar device for accessing a network. In some implementations, TRP 105-k and TRP 105-l may be part of a multi-TRP cluster of multiple TRPs 105 with which UE 115-f is configured to communicate (e.g., there may be more than two TRPs 105 with which UE 115-f may communicate, and the two or more TRPs 105 may be associated with one, two, or more different base stations). Process flow 700 may also include UE 115-f, which may be as described above with reference to Figure 1-6 An example corresponding to UE 115 is described.

[0157] In the following description of process flow 700, operations between UE 115-f, TRP 105-k, and TRP 105-1 may be performed in a different order or at different times. Certain operations may also be excluded from process flow 700, or other operations may be added to process flow 700. Although UE 115-f, TRP 105-k, and TRP 105-1 are shown as performing the operations of process flow 700, any wireless device may perform the operations shown.

[0158] At 705, UE 115-f may determine a channel quality associated with each of a set of TRPs, each of a set of antenna subarrays (e.g., antenna panels) of UE 115-f, or a combination thereof.

[0159] At 710, the UE 115-f, when operating in a DRX mode (e.g., a CDRX mode), may transmit an SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE 115-f for performing an SR operation. In some implementations, the UE 115-f may determine the set of antenna subarrays or the set of TRPs of the UE 115-f to be included in the indication based on the channel quality determination of 705. Additionally, the UE 115-f may transmit the SR on an uplink control channel (e.g., a PUCCH). In some implementations, the UE 115-f may receive a configuration message from one of the TRPs configured for communication with the UE 115-f (e.g., TRP 105-k or an anchor TRP), the configuration message including information for the UE 115-f to transmit the SR. For example, the configuration message may include information about the channel used to transmit the SR (e.g., ) and information about additional channels (e.g., PDCCH and PUSCH) used to transmit or receive additional messages for SR operations.

[0160] At 715, UE 115-f may receive an uplink grant in response to the transmitted SR. In some implementations, UE 115-f may receive the uplink grant using an antenna subarray set of UE 115-f indicated in the transmitted SR. Additionally, the antenna subarray set may include multiple antenna subarrays of UE 115-f. In some implementations, UE 115-f may receive the uplink grant on a downlink control channel (e.g., PDCCH).

[0161] At 720, UE 115-f may transmit uplink data based on the received uplink grant and the indication in the transmitted SR. In some implementations, the TRP set may include multiple TRPs, and UE 115-f may transmit uplink data to the multiple TRPs based on the received uplink grant and the indication in the transmitted SR. Additionally, UE 115-f may use multiple antenna subarrays to transmit uplink data to multiple TRPs, wherein the antenna array set included in the indication in the transmitted SR includes the multiple antenna subarrays. In some examples, UE 115-f may use a second antenna subarray in the antenna subarray set of UE 115-f to transmit the SR, and may transmit uplink data on a first antenna subarray in the antenna subarray set of UE 115-f that is different from the second antenna subarray. Additionally, UE 115-f may transmit uplink data on an uplink shared channel (e.g., PUSCH). In some implementations, UE 115-f may receive an uplink grant using an antenna subarray set as indicated in the transmitted SR, the antenna subarray set including a second antenna subarray that is different from a first antenna subarray in the antenna subarray set used to transmit uplink data.

[0162] Figure 8 A block diagram 800 of a device 805 supporting SR operation in CDRX mode according to aspects of the present disclosure is shown. The device 805 may be an example of aspects of the UE 115 as described herein. The device 805 may include a receiver 810, a UE communication manager 815, and a transmitter 820. 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).

[0163] The receiver 810 may 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 SR operation in CDRX mode). The information may be passed to other components of the device 805. The receiver 810 may be a reference Fig.11 Examples of aspects of the described transceiver 1120. The receiver 810 may utilize a single antenna or a collection of antennas.

[0164] The UE communication manager 815 may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in DRX mode. Additionally, when operating in DRX mode, the UE communication manager 815 may transmit an SR based on the received configuration. In some implementations, the UE communication manager 815 may receive an uplink grant in response to the transmitted SR. Subsequently, the UE communication manager 815 may transmit uplink data based on the received uplink grant and the received configuration.

[0165] Additionally or alternatively, when operating in DRX mode, the UE communication manager 815 may transmit an SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE. In some implementations, the UE communication manager 815 may receive an uplink grant in response to the transmitted SR. Additionally, the UE communication manager 815 may transmit uplink data based on the received uplink grant and the indication in the transmitted SR. The UE communication manager 815 may be an example of aspects of the UE communication manager 1110 described herein.

[0166] In some examples, the UE communication manager 815 as described herein may be implemented to achieve one or more potential advantages. For example, by using a configuration of a set of antenna subarrays (e.g., indicated by a TRP or determined by the UE communication manager 815) for performing SR operations, the UE communication manager 815 may enable the UE 115 to perform SR operations with higher reliability. Instead of using different antenna subarrays or attempting to perform SR operations with different TRPs, the UE communication manager 815 may use the configuration of the set of antenna subarrays to perform SR operations with corresponding TRPs (e.g., TRP-antenna subarray pairs) corresponding to the antenna subarrays, where the configuration of the set of antenna subarrays is selected to efficiently perform SR operations. Based on this configuration using the antenna set, the UE communication manager 815 may enable the UE 115 to reduce signaling overhead and save power by not performing multiple SR operations with less efficient antenna subarrays and not with other TRPs.

[0167] The UE communication manager 815 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 UE communication manager 815 or its subcomponents may be performed by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device designed to perform the functions described in the present disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0168] The UE communication manager 815 or its subcomponents may be physically located at different locations, including being distributed so that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the UE communication manager 815 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the UE communication manager 815 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0169] The transmitter 820 may transmit signals generated by other components of the device 805. In some examples, the transmitter 820 may be co-located with the receiver 810 in a transceiver module. For example, the transmitter 820 may be a reference Fig.11 Examples of aspects of the described transceiver 1120. The transmitter 820 may utilize a single antenna or a collection of antennas.

[0170] Fig. 9 A block diagram 900 of a device 905 supporting SR operation in CDRX mode according to aspects of the present disclosure is shown. The device 905 may be an example of aspects of the device 805 or UE 115 as described herein. The device 905 may include a receiver 910, a UE communication manager 915, and a transmitter 940. The device 905 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0171] The receiver 910 may 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 SR operation in CDRX mode). The information may be passed to other components of the device 905. The receiver 910 may be a reference Fig.11 Examples of aspects of the described transceiver 1120. The receiver 910 may utilize a single antenna or a collection of antennas.

[0172] The UE communication manager 915 may be an example of aspects of the UE communication manager 815 as described herein. The UE communication manager 915 may include an SR operation configuration receiver 920, an SR transmitter 925, an uplink grant receiver 930, and an uplink data transmitter 935. The UE communication manager 915 may be an example of aspects of the UE communication manager 1110 described herein.

[0173] The SR operation configuration receiver 920 may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof for the UE to use for communication when the UE operates in DRX mode.

[0174] When operating in DRX mode, the SR transmitter 925 may transmit the SR based on the received configuration. Additionally or alternatively, when operating in DRX mode, the SR transmitter 925 may transmit the SR including an indication of the antenna subarray set, or the TRP set, or a combination thereof, of the UE.

[0175] Uplink grant receiver 930 may receive an uplink grant in response to the transmitted SR.

[0176] The uplink data transmitter 935 may transmit uplink data based on the received uplink grant and the received configuration. Additionally or alternatively, the uplink data transmitter 935 may transmit uplink data based on the received uplink grant and the indication in the transmitted SR.

[0177] Based on a technique for transmitting an SR according to a configuration of the antenna subarray (e.g., a configuration indicated by the TRP or determined by the UE 115), a processor of the UE 115 (e.g., a processor that controls the receiver 910, the transmitter 940, or a processor as described in reference to FIG. Fig.11 The described transceiver 1120) can save battery life by transmitting SR with higher reliability by utilizing the configuration of antenna subarrays. Additionally, the processor can reduce the signaling overhead of performing multiple SR operations with antenna subarrays and TRPs that are less efficient than those included in the configuration.

[0178] The transmitter 940 may transmit signals generated by other components of the device 905. In some examples, the transmitter 940 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 940 may be a reference Fig.11 Examples of aspects of the described transceiver 1120. The transmitter 940 may utilize a single antenna or a collection of antennas.

[0179] Fig.10A block diagram 1000 of a UE communication manager 1005 supporting SR operation in CDRX mode according to aspects of the present disclosure is shown. The UE communication manager 1005 may be an example of aspects of the UE communication manager 815, the UE communication manager 915, or the UE communication manager 1110 described herein. The UE communication manager 1005 may include an SR operation configuration receiver 1010, an SR transmitter 1015, an uplink grant receiver 1020, an uplink data transmitter 1025, an antenna subarray selector 1030, and a channel quality determination component 1035. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0180] The SR operation configuration receiver 1010 may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof for the UE to use for communication when operating in DRX mode. In some examples, the SR operation configuration receiver 1010 may receive the configuration in one or more of RRC, DCI, or MAC-CE.

[0181] When operating in DRX mode, the SR transmitter 1015 may transmit the SR based on the received configuration. Additionally or alternatively, when operating in DRX mode, the SR transmitter 1015 may transmit the SR, which includes an indication of the UE's antenna subarray set, or the TRP set, or a combination thereof. In some examples, the SR transmitter 1015 may transmit the SR to a set of TRPs using a set of antenna subarrays of the UE, wherein the UE's TRP set includes the set of TRPs and the antenna subarray set includes the set of antenna subarrays. In other examples, the SR transmitter 1015 may transmit the SR using an antenna subarray set indicated by the received configuration, the antenna subarray set including a subset of the UE's antenna subarray set.

[0182] The uplink grant receiver 1020 may receive an uplink grant in response to the transmitted SR. In some examples, the uplink grant receiver 1020 may receive an uplink grant for a first TRP from a first TRP in a set of TRPs in response to the transmitted SR. Additionally or alternatively, the uplink grant receiver 1020 may receive an uplink grant for a second TRP from a second TRP in a set of TRPs in response to the transmitted SR. In some examples, the uplink grant receiver 1020 may receive an uplink grant for each TRP in a set of TRPs in response to the transmitted SR. Additionally or alternatively, the uplink grant receiver 1020 may receive an uplink grant for the TRP using a set of antenna subarrays of a UE indicated in the transmitted SR. In some implementations, the SR may be transmitted to a first TRP in a set of TRPs, and the uplink grant may be received from the first TRP in response to the transmitted SR. Additionally or alternatively, the set of antenna subarrays may include a second antenna subarray that is different from a first antenna subarray in the set of antenna subarrays used to transmit uplink data.In some implementations, the set of antenna subarrays may include a plurality of antenna subarrays.

[0183] The uplink data transmitter 1025 may transmit uplink data based on the received uplink grant and the received configuration. Additionally or alternatively, the uplink data transmitter 1025 may transmit uplink data based on the received uplink grant and the indication in the transmitted SR. In some examples, the uplink data transmitter 1025 may transmit uplink data to each of the TRP sets. In other examples, the uplink data transmitter 1025 may identify that one or more TRPs in the TRP set have transmitted an uplink grant in response to the transmitted SR. Additionally or alternatively, the uplink data transmitter 1025 may transmit uplink data to the one or more TRPs based on the identification. In some implementations, the uplink data transmitter 1025 may transmit uplink data to a group of TRPs based on the received uplink grant and the indication in the transmitted SR. In some examples, the uplink data transmitter 1025 may transmit uplink data to the group of TRPs using a set of antenna subarrays of the UE, the antenna subarray set including the set of antenna subarrays.

[0184] In some implementations, the SR may be transmitted on an uplink control channel (e.g., PUCCH), an uplink grant may be received on a downlink control channel (e.g., PDCCH), and uplink data may be transmitted on an uplink shared channel (e.g., PUSCH). Additionally, the SR may be transmitted using a second antenna subarray in the set of antenna subarrays of the UE, the second antenna subarray being different from a first antenna subarray in the set of antenna subarrays used to transmit uplink data.

[0185] The antenna subarray selector 1030 may select, by the UE, at least one antenna subarray in the antenna subarray set of the UE for transmitting an SR, or receiving an uplink grant, or transmitting uplink data, or a combination thereof.

[0186] The channel quality determining component 1035 may determine a channel quality associated with each of a set of TRPs and may determine the set of TRPs based on the determined channel quality, wherein the transmitted SR indicates the determined set of TRPs. Additionally or alternatively, the channel quality determining component 1035 may determine a channel quality associated with each of a set of antenna subarrays of the UE and may determine the set of antenna subarrays based on the determined channel quality, wherein the transmitted SR indicates the determined set of antenna subarrays.

[0187] Fig.11 A diagram of a system 1100 including a device 1105 supporting SR operation in CDRX mode according to various aspects of the present disclosure is shown. The device 1105 may be an example of a device 805, a device 905, or a UE 115 as described herein or include components of these devices. The device 1105 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a UE communication manager 1110, an I / O controller 1115, a transceiver 1120, an antenna 1125, a memory 1130, and a processor 1140. These components may be in electronic communication via one or more buses (e.g., bus 1145).

[0188] The UE communication manager 1110 may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in DRX mode. In some implementations, when operating in DRX mode, the UE communication manager 1110 may transmit an SR based on the received configuration. Additionally, the UE communication manager 1110 may receive an uplink grant in response to the transmitted SR. Subsequently, the UE communication manager 1110 may transmit uplink data based on the received uplink grant and the received configuration.

[0189] Additionally or alternatively, when operating in DRX mode, the UE communication manager 1110 may transmit an SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE. In some implementations, the UE communication manager 1110 may receive an uplink grant in response to the transmitted SR. Additionally, the UE communication manager 1110 may transmit uplink data based on the received uplink grant and the indication in the transmitted SR.

[0190] I / O controller 1115 can manage input and output signals of device 1105. I / O controller 1115 can also manage peripheral devices that are not integrated into device 1105. In some implementations, I / O controller 1115 can represent a physical connection or port to an external peripheral device. In some implementations, I / O controller 1115 can utilize an operating system, such as or another known operating system. In other implementations, the I / O controller 1115 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some implementations, the I / O controller 1115 may be implemented as part of the processor. In some implementations, a user may interact with the device 1105 via the I / O controller 1115 or via hardware components controlled by the I / O controller 1115.

[0191] The transceiver 1120 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1120 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1120 can also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0192] In some implementations, a wireless device may include a single antenna 1125. However, in some implementations, the device may have more than one antenna 1125, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0193] The memory 1130 may include random access memory (RAM) and read-only memory (ROM). The memory 1130 may store computer-readable, computer-executable code 1135 including instructions that, when executed, cause the processor to perform various functions described herein. In some implementations, the memory 1130 may include, among other things, a basic I / O system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0194] The processor 1140 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a central processing unit (CPU), a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some implementations, the processor 1140 may be configured to operate the memory array using a memory controller. In other implementations, the memory controller may be integrated into the processor 1140. The processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1130) to cause the device 1105 to perform various functions (e.g., functions or tasks that support SR operations in CDRX mode).

[0195] The code 1135 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1135 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some implementations, the code 1135 may not be directly executable by the processor 1140, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0196] Fig.12 A block diagram 1200 of a device 1205 supporting SR operation in CDRX mode according to aspects of the present disclosure is shown. The device 1205 may be an example of aspects of a base station 105 as described herein. The device 1205 may include a receiver 1210, a base station communication manager 1215, and a transmitter 1220. The device 1205 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0197] The receiver 1210 may 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 SR operation in CDRX mode). The information may be passed to other components of the device 1205. The receiver 1210 may be a reference Fig.15 Examples of aspects of the described transceiver 1520. The receiver 1210 may utilize a single antenna or a collection of antennas.

[0198] The base station communication manager 1215 may transmit to the UE a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in the DRX mode. In some implementations, the base station communication manager 1215 may receive an SR from the UE based on the transmitted configuration. Additionally, the base station communication manager 1215 may transmit an uplink grant to the UE in response to the received SR. Subsequently, the base station communication manager 1215 may receive uplink data from the UE based on the transmitted uplink grant.

[0199] Additionally or alternatively, the base station communication manager 1215 may receive an SR from a UE operating in DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE. In some implementations, the base station communication manager 1215 may transmit an uplink grant to the UE in response to the received SR. Additionally, the base station communication manager 1215 may receive uplink data based on the transmitted uplink grant and the indication in the received SR. The base station communication manager 1215 may be an example of aspects of the base station communication manager 1510 described herein.

[0200] The base station communication manager 1215 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the base station communication manager 1215 or its subcomponents may be performed by a general purpose processor, DSP, ASIC, FPGA or other programmable logic device designed to perform the functions described in the present disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0201] The base station communication manager 1215 or its subcomponents may be physically located at different locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the base station communication manager 1215 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the base station communication manager 1215 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, I / O components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0202] The transmitter 1220 may transmit signals generated by other components of the device 1205. In some examples, the transmitter 1220 may be co-located with the receiver 1210 in a transceiver module. For example, the transmitter 1220 may be a reference Fig.15 Examples of various aspects of the described transceiver 1520. The transmitter 1220 may utilize a single antenna or a collection of antennas.

[0203] Fig.13A block diagram 1300 of a device 1305 supporting SR operation in CDRX mode according to aspects of the present disclosure is shown. The device 1305 may be an example of aspects of the device 1205, or base station 105, as described herein. The device 1305 may include a receiver 1310, a base station communication manager 1315, and a transmitter 1340. The device 1305 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0204] The receiver 1310 may 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 SR operation in CDRX mode). The information may be passed to other components of the device 1305. The receiver 1310 may be a reference Fig.15 Examples of various aspects of the described transceiver 1520. The receiver 1310 may utilize a single antenna or a collection of antennas.

[0205] The base station communication manager 1315 may be an example of aspects of the base station communication manager 1215 as described herein. The base station communication manager 1315 may include a configuration transmitter 1320, an SR receiver 1325, an uplink grant transmitter 1330, and an uplink data receiver 1335. The base station communication manager 1315 may be an example of aspects of the base station communication manager 1510 as described herein.

[0206] The configuration transmitter 1320 may transmit to the UE a configuration indicating the UE's antenna subarray set, or TRP set, or a combination thereof for the UE to use for communication when operating in DRX mode.

[0207] The SR receiver 1325 may receive the SR from the UE based on the transmitted configuration. Additionally or alternatively, the SR receiver 1325 may receive the SR from the UE operating in the DRX mode, the SR including an indication of the antenna subarray set, or the TRP set, or a combination thereof for the UE.

[0208] Uplink grant transmitter 1330 may transmit an uplink grant to the UE in response to the received SR.

[0209] The uplink data receiver 1335 may receive uplink data from the UE based on the transmitted uplink grant. Additionally or alternatively, the uplink data receiver 1335 may receive uplink data based on the transmitted uplink grant and an indication in the received SR.

[0210] Transmitter 1340 may transmit signals generated by other components of device 1305. In some examples, transmitter 1340 may be co-located with receiver 1310 in a transceiver module. For example, transmitter 1340 may be a reference Fig.15 Examples of aspects of the described transceiver 1520. The transmitter 1340 may utilize a single antenna or a collection of antennas.

[0211] Fig.14 A block diagram 1400 of a base station communication manager 1405 supporting SR operation in CDRX mode in accordance with aspects of the present disclosure is shown. The base station communication manager 1405 may be an example of aspects of the base station communication manager 1215, the base station communication manager 1315, or the base station communication manager 1510 described herein. The base station communication manager 1405 may include a configuration transmitter 1410, an SR receiver 1415, an uplink grant transmitter 1420, an uplink data receiver 1425, and an anchor TRP identifier 1430. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0212] Configuration transmitter 1410 may transmit to the UE a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof for the UE to use for communication when operating in DRX mode. In some examples, configuration transmitter 1410 may transmit the configuration in one or more of RRC signaling, DCI, or MAC-CE.

[0213] The SR receiver 1415 may receive an SR from the UE based on the transmitted configuration. Additionally or alternatively, the SR receiver 1415 may receive an SR from a UE operating in DRX mode, the SR including an indication of an antenna subarray set, or a TRP set, or a combination thereof, for the UE. In some examples, the SR receiver 1415 may receive the SR via a TRP set, wherein each of the TRP sets monitors the SR from the UE. In other examples, the SR receiver 1415 may receive the SR via a TRP in the TRP set, wherein each of the TRP sets monitors the SR from the UE. In some implementations, the indicated TRP set may be determined based on a channel quality associated with each of the TRP sets, or each of the antenna subarray sets, or a combination thereof. Additionally or alternatively, the indicated antenna subarray set is determined based on a channel quality associated with each of the TRP sets, or each of the antenna subarray sets, or a combination thereof.

[0214] The uplink grant transmitter 1420 may transmit an uplink grant to the UE in response to the received SR. In some examples, the uplink grant transmitter 1420 may transmit a second uplink grant for a second TRP via a second TRP in the TRP set in response to the received SR. In some implementations, the uplink grant transmitter 1420 may determine to suppress transmission of the uplink grant via the second TRP based on determining that the base station has failed to receive the second SR via the second TRP in the TRP set. Additionally or alternatively, the uplink grant transmitter 1420 may transmit the uplink grant via at least one of the TRP sets indicated in the received SR. In some examples, the uplink grant transmitter 1420 may determine a TRP in the TRP set indicated in the received SR, and the uplink grant is transmitted via the determined one TRP. In other examples, the uplink grant transmitter 1420 may determine a set of TRPs in a set of TRPs indicated in a received SR, and the uplink grant is transmitted via the determined set of TRPs. In some implementations, the SR may be received via a first TRP in the set of TRPs, and the uplink grant may be transmitted via the first TRP in response to the received SR.

[0215] The uplink data receiver 1425 may receive uplink data from the UE based on the transmitted uplink grant. Additionally or alternatively, the uplink data receiver 1425 may receive uplink data based on the transmitted uplink grant and the indication in the received SR. In some examples, the uplink data receiver 1425 may receive uplink data via each of a set of TRPs, wherein the TRP set includes the set of TRPs. In other examples, the uplink data receiver 1425 may identify that one or more TRPs in the TRP set have transmitted an uplink grant in response to the received SR. Additionally or alternatively, the uplink data receiver 1425 may receive uplink data from the UE via the one or more TRPs based on the identification. In some examples, the uplink data receiver 1425 may receive uplink data from the UE via multiple TRPs based on the transmitted uplink grant and the indication in the received SR, and the TRP set includes the multiple TRPs.

[0216] In some implementations, the SR may be received on an uplink control channel (e.g., PUCCH), an uplink grant may be transmitted on a downlink control channel (e.g., PDCCH), and uplink data may be received on an uplink shared channel (e.g., PUSCH). Additionally, the SR may be received via a second TRP in a set of TRPs that is different from a first TRP in the set of TRPs that is used to receive uplink data.

[0217] The anchor TRP identifier 1430 may identify an anchor TRP in the TRP set, where the anchor TRP monitors the SR from the UE and may receive the SR via the anchor TRP.

[0218] Fig.15 A diagram of a system 1500 including a device 1505 supporting SR operation in CDRX mode according to aspects of the present disclosure is shown. The device 1505 may be an example of a device 1205, a device 1305, or a base station 105 as described herein or include components of the above devices. The device 1505 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a base station communication manager 1510, a network communication manager 1515, a transceiver 1520, an antenna 1525, a memory 1530, a processor 1540, and an inter-station communication manager 1545. These components may be in electronic communication via one or more buses (e.g., bus 1550).

[0219] The base station communication manager 1510 may transmit to the UE a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof of the UE for the UE to use for communication when operating in the DRX mode. In some implementations, the base station communication manager 1510 may receive an SR from the UE based on the transmitted configuration. Additionally, the base station communication manager 1510 may transmit an uplink grant to the UE in response to the received SR, and receive uplink data from the UE based on the transmitted uplink grant.

[0220] Additionally or alternatively, the base station communication manager 1510 may receive an SR from a UE operating in DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof for the UE. In some implementations, the base station communication manager 1510 may transmit an uplink grant to the UE in response to the received SR. Additionally, the base station communication manager 1510 may receive uplink data based on the transmitted uplink grant and the indication in the received SR.

[0221] The network communications manager 1515 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1515 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0222] The transceiver 1520 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1520 may represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1520 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0223] In some implementations, a wireless device may include a single antenna 1525. However, in some implementations, the device may have more than one antenna 1525, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0224] The memory 1530 may include RAM, ROM, or a combination thereof. The memory 1530 may store computer readable code 1535 including instructions that, when executed by a processor (e.g., processor 1540), cause the device to perform various functions described herein. In some implementations, the memory 1530 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0225] Processor 1540 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some implementations, processor 1540 may be configured to operate a memory array using a memory controller. In some implementations, the memory controller may be integrated into processor 1540. Processor 1540 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1530) to cause device 1505 to perform various functions (e.g., functions or tasks that support SR operations in CDRX mode).

[0226] The inter-site communication manager 1545 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with UE 115 in cooperation with other base stations 105. For example, the inter-site communication manager 1545 may coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-site communication manager 1545 may provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0227] The code 1535 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1535 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some implementations, the code 1535 may not be directly executable by the processor 1540, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0228] Fig.161 is a flow chart illustrating a method 1600 for supporting SR operation in CDRX mode according to aspects of the present disclosure. The operations of the method 1600 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1600 may be implemented by a UE 115 or components thereof as described herein. Figures 8 to 11 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0229] At 1605, the UE may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE to use for communication when operating in DRX mode. The operations of 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of 1605 may be performed as described with reference to Figures 8 to 11 The described SR operations configure the receiver to perform.

[0230] At 1610, the UE may transmit an SR based on the received configuration when operating in DRX mode. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be as described with reference to Figures 8 to 11 The SR transmitter described is implemented.

[0231] At 1615, the UE may receive an uplink grant in response to the transmitted SR. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be performed as described with reference to Figures 8 to 11 The described uplink grant is performed by the receiver.

[0232] At 1620, the UE may transmit uplink data based on the received uplink grant and the received configuration. The operations of 1620 may be performed according to the methods described herein. In some examples, aspects of the operations of 1620 may be performed as described with reference to Figures 8 to 11 The uplink data transmitter described is performed.

[0233] Fig.17 1 is a flow chart illustrating a method 1700 for supporting SR operation in CDRX mode according to aspects of the present disclosure. The operations of the method 1700 may be implemented by the UE 115 or components thereof as described herein. For example, the operations of the method 1700 may be implemented by the UE 115 or components thereof as described herein. Figures 8 to 11 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0234] At 1705, the UE may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use for communication when operating in DRX mode. The operations of 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed as described with reference to Figures 8 to 11 The described SR operations configure the receiver to perform.

[0235] At 1710, the UE may: select, by the UE, at least one antenna subarray from a set of antenna subarrays of the UE for transmitting an SR, or receiving an uplink grant, or transmitting uplink data, or a combination thereof. The operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed as described with reference to Figures 8 to 11 The described antenna subarray selector is implemented.

[0236] At 1715, the UE may transmit an SR based on the received configuration when operating in DRX mode. The operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be as described with reference to Figures 8 to 11 The SR transmitter described is implemented.

[0237] At 1720, the UE may receive an uplink grant in response to the transmitted SR. The operations of 1720 may be performed according to the methods described herein. In some examples, aspects of the operations of 1720 may be performed as described with reference to Figures 8 to 11 The described uplink grant is performed by the receiver.

[0238] At 1725, the UE may transmit uplink data based on the received uplink grant and the received configuration. The operations of 1725 may be performed according to the methods described herein. In some examples, aspects of the operations of 1725 may be performed as described with reference to Figures 8 to 11 The uplink data transmitter described is performed.

[0239] Fig.18 1 is a flow chart illustrating a method 1800 for supporting SR operation in CDRX mode according to aspects of the present disclosure. The operations of the method 1800 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1800 may be implemented by a UE 115 or components thereof as described herein. Figures 8 to 11 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0240] At 1805, the UE may transmit an SR when operating in DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE. The operations of 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of 1805 may be performed as described with reference to Figures 8 to 11 The SR transmitter described is implemented.

[0241] At 1810, the UE may receive an uplink grant in response to the transmitted SR. The operations of 1810 may be performed according to the methods described herein. In some examples, aspects of the operations of 1810 may be performed as described with reference to Figures 8 to 11 The described uplink grant is performed by the receiver.

[0242] At 1815, the UE may transmit uplink data based on the received uplink grant and the indication in the transmitted SR. The operations of 1815 may be performed according to the methods described herein. In some examples, aspects of the operations of 1815 may be performed as described with reference to Figures 8 to 11 The uplink data transmitter described is performed.

[0243] Fig.19 1 is a flow chart illustrating a method 1900 for supporting SR operation in CDRX mode according to aspects of the present disclosure. The operations of the method 1900 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 1900 may be implemented by a base station 105 or components thereof as described herein. Figures 12 to 15 In some examples, the base station may execute an instruction set to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0244] At 1905, the base station may transmit to the UE a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof for the UE to use for communication when operating in DRX mode. The operations of 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of 1905 may be performed as described with reference to Figures 12 to 15 The transmitter is configured to perform as described.

[0245] At 1910, the base station may receive an SR from the UE based on the transmitted configuration. The operations of 1910 may be performed according to the methods described herein. In some examples, aspects of the operations of 1910 may be performed as described with reference to Figures 12 to 15 The SR receiver described is implemented.

[0246] At 1915, the base station may transmit an uplink grant to the UE in response to the received SR. The operations of 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of 1915 may be performed as described with reference to Figures 12 to 15 The uplink grant transmitter described is performed.

[0247] At 1920, the base station may receive uplink data from the UE based on the transmitted uplink grant. The operations of 1920 may be performed according to the methods described herein. In some examples, aspects of the operations of 1920 may be performed as described with reference to Figures 12 to 15 The uplink data receiver described is performed.

[0248] Fig. 20 1 is a flow chart illustrating a method 2000 for supporting SR operation in CDRX mode according to aspects of the present disclosure. The operations of the method 2000 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 2000 may be implemented by a base station 105 or components thereof as described herein. Figures 12 to 15 In some examples, the base station may execute an instruction set to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0249] At 2005, the base station may receive an SR from a UE operating in a DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE. The operations of 2005 may be performed according to the methods described herein. In some examples, aspects of the operations of 2005 may be performed as described with reference to Figures 12 to 15 The SR receiver described is implemented.

[0250] At 2010, the base station may transmit an uplink grant to the UE in response to the received SR. The operations of 2010 may be performed according to the methods described herein. In some examples, aspects of the operations of 2010 may be performed as described with reference to Figures 12 to 15 The uplink grant transmitter described is performed.

[0251] At 2015, the base station may receive uplink data based on the transmitted uplink grant and the indication in the received SR. The operations of 2015 may be performed according to the methods described herein. In some examples, aspects of the operations of 2015 may be performed as described with reference to Figures 12 to 15 The uplink data receiver described is performed.

[0252] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0253] The techniques described herein can be used in various wireless communication systems, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA) and other systems. A CDMA system can implement radio technologies such as CDMA2000 or Universal Terrestrial Radio Access (UTRA). CDMA2000 covers IS-2000, IS-95 and IS-856 standards. The IS-2000 version is often referred to as CDMA2000 1X or 1X. IS-856 (TIA-856) is often referred to as CDMA2000 1xEV-DO or high rate packet data (HRPD). UTRA includes wideband CDMA (WCDMA) and other CDMA variants. A TDMA system can implement radio technologies such as Global System for Mobile Communications (GSM).

[0254] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, or Flash-OFDM. UTRA and E-UTRA are parts of Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from an organization called the Third Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the Third Generation Partnership Project 2 (3GPP2). The techniques described herein can be used for systems and radio technologies mentioned herein as well as for other systems and radio technologies. Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to applications other than LTE, LTE-A, LTE-A Pro, or NR applications.

[0255] A macro cell generally covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with service subscriptions to a network provider. A small cell may be associated with a lower power base station (compared to a macro cell), and the small cell may operate in the same or different (e.g., licensed or unlicensed) frequency band as the macro cell. According to various examples, a small cell may include a pico cell, a femto cell, and a micro cell. A pico cell, for example, may cover a smaller geographic area and may allow unrestricted access by UEs with service subscriptions to a network provider. A femto cell may also cover a smaller geographic area (e.g., a residence) and may provide restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in the residence, etc.). An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or more (eg, two, three, four, etc.) cells and may also support communication using one or more component carriers.

[0256] The wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, each base station may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, each base station may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0257] The information and signals described herein may be represented using any of a variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0258] The various illustrative blocks and modules described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, a DSP, an 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 herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional 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, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0259] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. 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 may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in different locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0260] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to transfer from one place to another.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.As an example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, disk storage or other magnetic storage device, or can be used to carry or store instruction or data structure form of desired program code means and can be accessed by general or special-purpose computer or general or special-purpose processor any other non-transient medium.Any connection is also properly referred to as computer-readable medium.For example, if software is transmitted from website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are just included in the definition of medium. Disk and disc as used herein include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0261] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list 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 interpreted as referring to a closed set of conditions. For example, an exemplary step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0262] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between similar components. If only the first reference number is used in the specification, the description may apply to any of the similar components having the same first reference number regardless of the second reference number, or other subsequent reference numbers.

[0263] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or that fall within the scope of the claims. The term "exemplary" as used herein means "used as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these 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.

[0264] The description herein is provided to enable those skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the universal 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 should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment UE, comprising: receiving a configuration indicating a set of antenna subarrays, or a set of transmit reception points, or a combination thereof, for the UE to use for communication when the UE is operating in a discontinuous reception mode; transmitting a scheduling request based at least in part on the received configuration while operating in the discontinuous reception mode; receiving an uplink grant in response to the transmitted scheduling request; as well as Uplink data is transmitted based at least in part on the received uplink grant and the received configuration.

2. The method of claim 1 , wherein transmitting the scheduling request comprises: The scheduling request is transmitted to a plurality of transmission reception points using a plurality of antenna subarrays of the UE, wherein the set of transmission reception points of the UE includes the plurality of transmission reception points and the set of antenna subarrays includes the plurality of antenna subarrays.

3. The method of claim 1 , wherein transmitting the scheduling request comprises: The scheduling request is transmitted using the set of antenna subarrays indicated by the received configuration, the set of antenna subarrays comprising a subset of a plurality of antenna subarrays of the UE.

4. The method of claim 1 , wherein receiving the configuration comprises: The configuration is received in one or more of radio resource control signaling, downlink control information (DCI), or a medium access control (MAC) control element.

5. The method of claim 1, further comprising selecting, by the UE, at least one of a plurality of antenna subarrays of the UE for performing one or more of: transmitting the scheduling request, receiving the uplink grant, or transmitting the uplink data.

6. The method of claim 1 , wherein receiving the uplink grant in response to the transmitted scheduling request comprises: receiving, from a first transmission reception point in the set of transmission reception points, an uplink grant for the first transmission reception point in response to the transmitted scheduling request; as well as An uplink grant for a second transmission reception point in the set of transmission reception points is received from the second transmission reception point in response to the transmitted scheduling request.

7. The method of claim 1, wherein the transmission reception point set comprises a plurality of transmission reception points, the method further comprising: An uplink grant for each of the plurality of transmit-reception points is received from the transmit-reception point in response to the transmitted scheduling request.

8. The method of claim 1, wherein the scheduling request is transmitted to a first transmission reception point in the set of transmission reception points, and the uplink grant is received from the first transmission reception point in response to the transmitted scheduling request.

9. The method of claim 1, wherein the set of transmission reception points comprises a plurality of transmission reception points, and transmitting the uplink data comprises transmitting uplink data to each of the plurality of transmission reception points.

10. The method of claim 1, wherein transmitting the uplink data comprises: identifying that one or more transmit-receive points in the set of transmit-receive points have transmitted an uplink grant in response to the transmitted scheduling request; as well as Uplink data is transmitted to the one or more transmission reception points based at least in part on the identification.

11. A method for wireless communication at a user equipment (UE), comprising: transmitting a scheduling request when operating in a discontinuous reception mode, the scheduling request comprising an indication of a set of antenna subarrays, or a set of transmit-receive points, or a combination thereof, for the UE; receiving an uplink grant in response to the transmitted scheduling request; and Uplink data is transmitted based at least in part on the received uplink grant and the indication in the transmitted scheduling request.

12. The method of claim 11, wherein the transmission reception point set comprises a plurality of transmission reception points, the method further comprising: Based at least in part on the received uplink grant and the indication in the transmitted scheduling request, uplink data is transmitted to the plurality of transmit-reception points using a plurality of antenna subarrays of the UE, the set of antenna subarrays comprising the plurality of antenna subarrays.

13. The method of claim 11 , wherein receiving the uplink grant in response to the transmitted scheduling request comprises: The uplink grant is received using the set of antenna subarrays for the UE indicated in the transmitted scheduling request.

14. The method of claim 11, further comprising: determining a channel quality associated with one or more of: each transmit-receive point in the set of transmit-receive points, or each antenna subarray in the set of antenna subarrays of the UE; and One or more of the set of transmit-receive points or the set of antenna subarrays is determined based at least in part on the determined channel quality, wherein the transmitted scheduling request indicates the determined set of transmit-receive points or the determined set of antenna subarrays.

15. A method for wireless communication at a base station, comprising: transmitting to a user equipment (UE) a configuration indicating a set of antenna subarrays, or a set of transmit-receive points, or a combination thereof, of the UE for use by the UE to communicate when operating in a discontinuous reception mode; receiving a scheduling request from the UE based at least in part on the transmitted configuration; transmitting an uplink grant to the UE in response to the received scheduling request; as well as Uplink data is received from the UE based at least in part on the transmitted uplink grant.

16. The method of claim 15, wherein receiving the scheduling request comprises receiving the scheduling request via a plurality of transmission reception points, wherein each of the plurality of transmission reception points monitors for scheduling requests from the UE.

17. The method of claim 15, wherein receiving the scheduling request comprises: The scheduling request is received via one of the set of transmission reception points, wherein each of the set of transmission reception points monitors the scheduling request from the UE.

18. The method of claim 15, wherein receiving the scheduling request comprises: identifying an anchor transmission reception point in the set of transmission reception points, wherein the anchor transmission reception point monitors a scheduling request from the UE; as well as The scheduling request is received via the anchor transmission reception point.

19. The method of claim 15, wherein the uplink grant is transmitted via a first transmission reception point in the set of transmission reception points in response to the received scheduling request, the method further comprising: A second uplink grant for a second transmission reception point in the set of transmission reception points is transmitted via the second transmission reception point in response to the received scheduling request.

20. The method of claim 15, wherein the scheduling request is received via a first transmission reception point in the set of transmission reception points, and the uplink grant is transmitted via the first transmission reception point in response to the received scheduling request.

21. The method of claim 20, further comprising: The determination to refrain from transmitting an uplink grant via a second transmission reception point in the set of transmission reception points is based at least in part on a determination that the base station failed to receive a second scheduling request via the second transmission reception point.

22. The method of claim 15, wherein receiving the uplink data comprises receiving uplink data via each of a plurality of transmission reception points, wherein the set of transmission reception points includes the plurality of transmission reception points.

23. The method of claim 15, wherein receiving the uplink data comprises: identifying that one or more transmit-receive points in the set of transmit-receive points have transmitted an uplink grant in response to the received scheduling request; as well as Uplink data is received from the UE via the one or more transmission-reception points based at least in part on the identification.

24. A method for wireless communication at a base station, comprising: receiving a scheduling request from a user equipment UE operating in a discontinuous reception mode, the scheduling request comprising an indication of a set of antenna subarrays, or a set of transmit reception points, or a combination thereof, for the UE; transmitting an uplink grant to the UE in response to the received scheduling request; as well as Uplink data is received based at least in part on the transmitted uplink grant and the indication in the received scheduling request.

25. The method of claim 24, wherein receiving the uplink data comprises: Based at least in part on the transmitted uplink grant and the indication in the received scheduling request, uplink data is received from the UE via a plurality of transmit-receive points, the set of transmit-receive points including the plurality of transmit-receive points.

26. The method of claim 24, wherein the scheduling request is received via a second transmission reception point in the set of transmission reception points, the second transmission reception point being different from a first transmission reception point in the set of transmission reception points used to receive the uplink data.

27. The method of claim 24, wherein transmitting the uplink grant in response to the received scheduling request comprises: The uplink grant is transmitted via at least one transmit reception point in the set of transmit reception points indicated in the received scheduling request.

28. The method of claim 27, further comprising: A transmission reception point in the transmission reception point set indicated in the received scheduling request is determined, and the uplink grant is transmitted via the determined transmission reception point.

29. The method of claim 27, further comprising: A plurality of transmission reception points in the transmission reception point set indicated in the received scheduling request is determined, and the uplink grant is transmitted via the determined plurality of transmission reception points.

30. The method of claim 24, wherein the indicated set of transmit-receive points is determined based at least in part on a channel quality associated with each transmit-receive point in the set of transmit-receive points, or each antenna subarray in the set of antenna subarrays, or a combination thereof.

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