Techniques for determining sidelink resources for a user equipment enabling multiple transmission and reception points

Abstract

Techniques for wireless communications are described. A user equipment (UE) may be configured with one or more transmit and receive points (TRPs). The UE may support sidelink communications, which may be referred to as a vehicle-to-everything (V2X) communication system, a vehicle-to-vehicle (V2V) communication system, or the like. The UE may provide improvements in resource determination for sidelink communications by determining whether multiple peer UEs may be spatially multiplexed on time and frequency resources. In order to mitigate interference between multiple peer UEs, the UE may send a power control request message to one or more peer UEs to adjust a transmit power level, and receive a power control response message from one or more peer UEs that accept or reject the transmit power level adjustment. Thus, the UE may experience efficient sidelink operation.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. patent application No. 17 / 179,247, filed by DUTTA et al. on February 18, 2021, entitled “TECHNIQUES FOR DETERMINING SIDELINK RESOURCES FOR MULTIPLE TRANSMISSION AND RECEPTION POINTS ENABLED USER EQUIPMENTS,” and priority to U.S. Provisional Patent Application No. 63 / 001,206, filed by DUTTA et al. on March 27, 2020, entitled “TECHNIQUES FOR DETERMINING SIDELINK RESOURCES FOR MULTIPLE TRANSMISSION AND RECEPTION POINTS ENABLED USER EQUIPMENTS,” each of which is assigned to the assignee of this application and is hereby incorporated by reference in its entirety. Technical Field

[0003] The present disclosure relates to sidelink communications and techniques, for example, for determining sidelink resources for a user equipment (UE) with multiple transmit and receive points (TRPs) enabled. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems can 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 employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM).

[0005] A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting communication for multiple communication devices, which may be further referred to as user equipment (UE). Some wireless communication systems may support sidelink communications between multiple communication devices. Examples of sidelink communications may include vehicle-based communications, which may also be referred to as vehicle-to-everything (V2X) communication systems, vehicle-to-vehicle (V2V) communication systems, and the like. As the demand for sidelink communication efficiency increases, it may be desirable to provide improvements to sidelink communications to support higher reliability and low latency sidelink operations, and the like. Summary of the invention

[0006] Various aspects of the described technology relate to configuring a communication device with a single or multiple transmit and receive points (TRPs), which may be referred to as a user equipment (UE). By configuring the UE to determine whether multiple peer UEs can be spatially multiplexed on time and frequency resources, the UE can be configured to provide improvements in resource determination for sidelink communications. In order to mitigate interference between two or more peer UEs that are spatially multiplexed, the UE may request one or both of the peer UEs to adjust the transmit power. In some examples, the UE may additionally or alternatively request one or both of the peer UEs to beamform in one direction (and zero some other direction). Thus, the UE can experience efficient sidelink operation by spatially multiplexing multiple peer UEs and communicating with the peer UEs via multiple TRPs.

[0007] A method for sidelink communication at a UE is described. The method may include: sending a first power control request message to a first peer UE using a first TRP of at least two TRPs associated with the UE, and sending a second power control request message to a second peer UE using a first TRP or a second TRP of at least two TRPs associated with the UE; in response to sending, receiving a first power control response message from the first peer UE using the first TRP of the UE, and receiving a second power control response message from the second peer UE using the first TRP or the second TRP of the UE; and determining time and frequency resources for sidelink communication with the first peer UE and the second peer UE based on the received first power control response message and the received second power control response message.

[0008] An apparatus for sidelink communication is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to: send a first power control request message to a first peer device using a first TRP of at least two TRPs associated with the apparatus, and send a second power control request message to a second peer device using a first TRP or a second TRP of at least two TRPs associated with the apparatus; in response to the sending, receive a first power control response message from the first peer device using the first TRP of the apparatus, and receive a second power control response message from the second peer device using the first TRP of the apparatus or the second TRP of the apparatus; and determine time and frequency resources for sidelink communication with the first peer device and the second peer device based on the received first power control response message and the received second power control response message.

[0009] Another apparatus for sidelink communications is described. The apparatus may include components for: sending a first power control request message to a first peer device using a first TRP of at least two TRPs associated with the apparatus, and sending a second power control request message to a second peer device using a first TRP or a second TRP of at least two TRPs associated with the apparatus; in response to sending, receiving a first power control response message from the first peer device using the first TRP of the apparatus, and receiving a second power control response message from the second peer device using the first TRP of the apparatus or the second TRP of the apparatus; and determining time and frequency resources for sidelink communications with the first peer device and the second peer device based on the received first power control response message and the received second power control response message.

[0010] A non-transitory computer-readable medium is described that stores code for sidelink communication at a UE. The code may include instructions executable by a processor to: send a first power control request message to a first peer UE using a first TRP of at least two TRPs associated with the UE, and send a second power control request message to a second peer UE using a first TRP or a second TRP of at least two TRPs associated with the UE; in response to sending, receive a first power control response message from the first peer UE using the first TRP of the UE, and receive a second power control response message from the second peer UE using the first TRP or the second TRP of the UE; and determine time and frequency resources for sidelink communication with the first peer UE and the second peer UE based on the received first power control response message and the received second power control response message.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first power control request message and the second power control request message include transmit power parameters for adjusting transmit power values ​​of the first peer UE and the second peer UE.

[0012] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining to spatially multiplex sidelink communications of the first peer UE and the second peer UE based on sidelink information associated with the first peer UE and the second peer UE, the sidelink information including an RSRP indicator or an RSRQ indicator or both.

[0013] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for multiplexing sidelink communications of a first peer UE and a second peer UE on determined time and frequency resources, wherein the multiplexing includes spatial division multiplexing.

[0014] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining a first transmit power value for a first peer UE and a second transmit power value for a second peer UE based on sidelink information associated with the first peer UE and the second peer UE, wherein the first transmit power value may be different from the second transmit power value.

[0015] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first power control request message includes a first indication of a first transmit power value and the second power control request message includes a second indication of a second transmit power value.

[0016] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining that a first peer UE accepts a first transmit power value and a second peer UE accepts a second transmit power value based on a first power control response message and a second power control response message, wherein determining time and frequency resources for sidelink communication with the first peer UE and the second peer UE may be based on the first peer UE accepting the first transmit power value and the second peer UE accepting the second transmit power value.

[0017] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending first sidelink control information (SCI) to a first peer UE using the UE's first TRP and sending a second SCI to a second peer UE using the UE's second TRP based on a first power control response message indicating that the first peer UE accepts a first transmit power value and a second power control response message indicating that the second peer UE accepts a second transmit power value.

[0018] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: sending a first modulation and coding scheme (MCS) request message to a second peer UE using the UE's second TRP based on a first power control response message indicating that the first peer UE rejects the first transmit power value and a second power control response message indicating that the second peer UE accepts the second transmit power value, wherein the first MCS request message includes a first MCS restriction, and receiving a first MCS response message from the second peer UE using the UE's second TRP based on the first MCS request message.

[0019] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending a third power control request message to a first peer UE using the UE's first TRP based on a first MCS response message indicating that the second peer UE accepts the first MCS restriction, and receiving a third power control response message from the first peer UE using the UE's first TRP based on the third power control request message.

[0020] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the third power control request message includes a third indication of a third transmit power value different from the first transmit power value.

[0021] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending a second MCS request message to a second peer UE using the UE's second TRP based on a third power control response message indicating that the first peer UE rejects a third transmit power value, wherein the second MCS request message includes a second MCS limit different from the first MCS limit, and receiving a second MCS response message from the second peer UE using the UE's second TRP based on the second MCS request message.

[0022] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining a first MCS limit or a second MCS limit, or both, based on sidelink information associated with a first peer UE and a second peer UE.

[0023] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining, based on a first power control response message and a second power control response message, that a first peer UE accepts a first transmit power value and a second peer UE rejects the second transmit power value, determining a third transmit power value different from the second transmit power value based on the second peer UE rejecting the second transmit power value, and resending a second power control request message to a second peer UE using a second TRP of the UE based on a second power control response message indicating that the second peer UE rejects the second transmit power value, wherein the resent second power control request message includes an indication of the third transmit power value.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining the third transmit power value may include operations, features, components, or instructions for updating the second transmit power value with the transmit power adjustment value.

[0025] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining that a third transmit power value satisfies a threshold associated with a second peer UE, wherein a second power control request message including an indication of the third transmit power value may be resent based on the third transmit power value satisfying the threshold associated with the second peer UE.

[0026] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining an MCS limit for the first peer UE based on receiving a third power control response message indicating that the second peer UE accepts a third transmit power value.

[0027] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending an MCS request message to a first peer UE using the UE's first TRP, wherein the MCS request message includes an indication of an MCS restriction, and based on the MCS request message, receiving an MCS response message from the first peer UE using the UE's first TRP, wherein determining time and frequency resources for sidelink communication with the first peer UE and a second peer UE may be based on the first peer UE accepting the MCS restriction and the second peer UE accepting a third transmit power value.

[0028] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending a first beam modification request message to a first peer UE using the UE's first TRP, or sending a second beam modification request message to a second peer UE using the UE's second TRP, or both, based on first capability information associated with the first peer UE or second capability information associated with the second peer UE, or both, and receiving a first beam modification response message from the first peer UE using the UE's first TRP, or receiving a second beam modification response message from the second peer UE using the UE's second TRP, or both, based on the first beam modification request message or the second beam modification request message, or both.

[0029] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending a first power control request message or a second power control request message or both based on the first beam modification response message or the second beam modification response message or both.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first beam modification request message or the second beam modification request message, or both, includes an indication for the first peer UE or the second peer UE, or both, to activate a directional beam set for sidelink communication.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first beam modification request message or the second beam modification request message, or both, includes an indication for the first peer UE or the second peer UE, or both, to deactivate a directional beam set for sidelink communication.

[0032] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first beam modification request message or a second beam modification request message, or both, includes an indication of a threshold transmit power value for each directional beam to be used by the first peer UE or the second peer UE or both for sidelink communications.

[0033] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first beam modification response message or a second beam modification response message, or both, includes an indication for the first peer UE or the second peer UE or both to accept or reject a directional beam set for sidelink communication by the first peer UE or the second peer UE or both.

[0034] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first TRP can be different from the second TRP.

[0035] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the determined time and frequency resources include the same block of time and frequency resources.

[0036] A method for sidelink communication at a UE is described. The method may include: receiving a power control request message from a peer UE, the power control request message including an indication of a transmit power value for the UE, the peer UE having a plurality of TRPs; based on receiving, sending a power control response message from the peer UE; and sending a sidelink communication to the peer UE according to the transmit power value.

[0037] An apparatus for sidelink communication is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to: receive a power control request message from a peer device, the power control request message including an indication of a transmit power value for the device, the peer device having a plurality of TRPs; based on the receiving, send a power control response message from the peer device; and send a sidelink communication to the peer device in accordance with the transmit power value.

[0038] Another apparatus for sidelink communication is described. The apparatus may include components for: receiving a power control request message from a peer device, the power control request message including an indication of a transmit power value for the device, the peer device having multiple TRPs; based on receiving, sending a power control response message from the peer device; and sending a sidelink communication to the peer device based on the transmit power value.

[0039] A non-transitory computer-readable medium is described that stores code for sidelink communication at a UE. The code may include instructions executable by a processor to: receive a power control request message from a peer UE, the power control request message including an indication of a transmit power value for the UE, the peer UE having multiple TRPs; based on receiving, send a power control response message from the peer UE; and send a sidelink communication to the peer UE according to the transmit power value.

[0040] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for setting a transmit power level of the UE based on a transmit power value indicated in a power control request message.

[0041] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving an SCI from a peer UE based on a power control response message indicating that the UE accepts a transmit power value.

[0042] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: receiving an MCS request message based on a power control response message indicating that the UE refuses to transmit a power value, wherein the MCS request message includes an MCS restriction, and sending an MCS response message based on the MCS request message.

[0043] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving a beam modification request message based on capability information associated with the UE and sending a beam modification response message based on the beam modification request message.

[0044] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving a power control request message based on the beam modification response message.

[0045] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the beam modification request message includes an indication that the UE is to activate a set of directional beams for sidelink communication.

[0046] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the beam modification request message includes an indication that the UE is to deactivate a set of directional beams for sidelink communications.

[0047] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the beam modification request message includes an indication of a threshold transmit power value associated with one or more directional beams to be used by the UE for sidelink communications.

[0048] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the beam modification response message includes an indication of a UE's acceptance or rejection of one or more directional beams used by the UE for sidelink communications. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figures 1 to 4 An example of a wireless communication network according to various aspects of the present disclosure is illustrated.

[0050] Figure 5 An example of a protocol stack according to various aspects of the present disclosure is illustrated.

[0051] Figures 6 to 9 An example of a process flow according to various aspects of the present disclosure is illustrated.

[0052] Fig.10 and Fig.11 A block diagram of a device according to various aspects of the present disclosure is shown.

[0053] Fig.12 A block diagram of a user equipment (UE) communications manager is shown in accordance with various aspects of the present disclosure.

[0054] Fig.13 A diagram of a system including devices according to various aspects of the present disclosure is shown.

[0055] Figures 14 to 17 A flow chart illustrating a method according to various aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0056] A wireless communication system may include multiple communication devices (such as UEs and base stations), which may provide wireless communication services to the UEs. For example, such a base station may be a next-generation node B or a gigabit node B (either of which may be referred to as a gNB), which may support a variety of radio access technologies, including 4G systems (such as LTE systems) and 5G systems (which may be referred to as NR systems). Some wireless communication systems may also support sidelink communications between multiple UEs. Examples of sidelink communications may include, but are not limited to, vehicle-to-everything (V2X) communication systems, vehicle-to-vehicle (V2V) communication systems, and the like. As demands for communication efficiency and reliability increase, it may be desirable for wireless communication systems to provide improvements to sidelink communications to support higher reliability and low latency sidelink operations, and the like.

[0057] The UE may establish a sidelink connection with one or more other UEs in a wireless communication system (e.g., such as a V2X communication system). In some examples, the UE may support unicast communication, broadcast communication, or multicast communication, or a combination thereof. In order to provide improvements to sidelink communications, the UE may be configured to determine whether multiple peer UEs can be spatially multiplexed in time and frequency resources. In some examples, in order to reduce interference between peer UEs, the UE may request the peer UE to adjust the transmit power. In some examples, the UE may additionally or alternatively request the peer UE to perform beamforming in one direction depending on whether the peer UE supports beamforming. Therefore, the UE can experience effective sidelink operation by spatially multiplexing multiple peer UEs and communicating with the peer UEs through multiple TRPs.

[0058] Various aspects of the subject matter described in the present disclosure may be implemented to achieve one or more of the following potential improvements. The techniques employed by the UE may provide benefits and enhancements to the operation of the UE. For example, the operations performed by the UE may provide improvements to sidelink operations. In some examples, configuring the UE to support spatial division multiplexing of multiple peer UEs for sidelink communications may support improvements to power consumption, spectral efficiency, and in some examples, may promote enhanced efficiency of sidelink operations and other benefits.

[0059] Various aspects of the present disclosure are initially described in the context of wireless communication systems. Various aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flow charts related to techniques for determining sidelink resources for a UE that enables multiple TRPs.

[0060] Figure 1 An example of a wireless communication system 100 according to various aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be 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 examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low-latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0061] The base stations 105 may be dispersed across a geographic area to form the wireless communication system 100 and may be devices of different forms or with different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base stations 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which the base stations 105 and the UEs 115 may support communication of signals according to one or more radio access technologies.

[0062] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, mobile, or both at different times. The UEs 115 may be devices of different forms or with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. Figure 1 As shown, the UE 115 described herein may be able to communicate with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network devices).

[0063] The base stations 105 may communicate with the core network 130, or with each other, or with both. For example, the base stations 105 may be connected to the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3 or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) or indirectly (e.g., through the core network 130) via the backhaul links 120 (e.g., via X2, Xn or other interfaces), or both. In some examples, the backhaul links 120 may be or include one or more wireless links. One or more of the base stations 105 described herein may include or may be referred to by a person of ordinary skill in the art as: a base transceiver station, a radio base station, an access point, a radio transceiver, a node B, an eNode 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 eNode B or other suitable terms.

[0064] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, among other examples. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a notebook computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects, such as appliances or vehicles, meters, etc. The UE 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays, as well as base stations 105 and network devices (including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations), and other examples, such as Figure 1 shown.

[0065] The UE 115 and the base station 105 may communicate wirelessly with each other over one or more carriers via one or more communication links 125. The term "carrier" may refer to a set of radio spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion (e.g., bandwidth portion (BWP)) of a radio spectrum band that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-APro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used with frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0066] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located based on a channel raster for discovery by UE 115. A carrier may operate in a standalone mode, where a UE 115 may perform initial acquisition and connection via a carrier, or a carrier may operate in a non-standalone mode, where a connection is anchored using a different carrier (e.g., of the same or different radio access technology).

[0067] 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. A carrier may carry downlink or uplink communications (e.g., in FDD mode), or may be configured to carry downlink and uplink communications (e.g., in TDD mode). A carrier may be associated with a bandwidth of a radio spectrum, and in some examples, the carrier bandwidth may be referred to as a "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a plurality of determined bandwidths of a carrier for a radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). The device of the wireless communication system 100 (e.g., the base station 105, the UE 115, or both) may have a hardware configuration that supports communication on a carrier bandwidth, or may be configured to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a UE 115 that supports simultaneous communication via a carrier associated with a plurality of carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., sub-band, BWP) or the entire carrier bandwidth.

[0068] The signal waveform transmitted on the carrier may be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may 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, the coding rate of the modulation scheme, or both). Therefore, 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 may be. Wireless communication resources may refer to a combination of radio spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity of communications with UE 115.

[0069] One or more parameter sets for a carrier may be supported, where the parameter set may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs with the same or different parameter sets. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications by a UE 115 may be restricted to one or more active BWPs. A time interval for a base station 105 or a UE 115 may be expressed as a multiple of a basic time unit, which may be referred to, for example, as a T.s =1 / (Δf max ·N f ) seconds sampling period, where Δf max It can represent the maximum supported subcarrier spacing, and N f The maximum supported discrete Fourier transform (DFT) size may be indicated. The time intervals of the communication resources may be organized according to radio frames, each radio frame having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0070] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, the frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into multiple time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include multiple symbol periods (e.g., depending on the length of the cyclic prefix appended to each symbol period). In some wireless communication systems 100, the time slot may be further divided into multiple micro-time slots containing one or more symbols. In addition to the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling period. The duration of a symbol period may depend on the subcarrier spacing or the RF spectrum band of operation. A subframe, time slot, microslot, or symbol may be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0071] 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 one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) of a physical control channel may be defined by a plurality of symbol periods and may extend across a system bandwidth of a carrier or a subset of a system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information of a control information format having a given payload size. A search space set may include a common search space set configured for sending control information to a plurality of UEs 115 and a UE-specific search space set for sending control information to a specific UE 115.

[0072] Each base station 105 can provide communication coverage through one or more cells, such as macro cells, small cells, hot spots, or other types of cells, or any combination thereof. The term "cell" may refer to a logical communication entity used to communicate with the base station 105 (e.g., via a carrier), and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other) used to distinguish adjacent cells. In some examples, a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. Depending on various factors such as the capabilities of the base station 105, such cells may range from a smaller area (e.g., a structure, a subset of a structure) to a larger area. For example, a cell may be or include a building, a subset of a building, or an external space between or overlapping geographic coverage areas 110, as well as other examples.

[0073] A macro cell covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to UE 115 with a service subscription to a network provider that supports the macro cell. A small cell may be associated with a base station 105 with lower power than a macro cell, and the small cell may operate in a radio frequency spectrum band that is the same or different (e.g., licensed, unlicensed) from the macro cell. A small cell may provide unrestricted access to a UE 115 with a service subscription to a network provider, or may provide restricted access to a UE 115 associated with a small cell (e.g., a UE 115 in a closed subscriber group (CSG), a UE 115 associated with a user in a home or office). A base station 105 may support one or more cells, and may also support communication on one or more cells using one or more component carriers.

[0074] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices. In some examples, base stations 105 may be mobile and thus provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0075] The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing, and in some examples, transmissions from different base stations 105 may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0076] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automatic 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 such information to a central server or application that utilizes the information or presents the information to a person interacting with the application. Some UEs 115 may be designed to collect information or enable automatic behavior of machines or other devices. Application examples of MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business billing.

[0077] Some UEs 115 may be configured to employ an operating mode that reduces power consumption, 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 at a reduced peak rate. Other power saving techniques for UE 115 include entering a power saving deep sleep mode when not engaged in active communication, operating over a limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a subcarrier or resource block (RB) set) within a carrier, within a guard band of a carrier, or outside a carrier.

[0078] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE115 can be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication, and can be supported by one or more mission-critical services, such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include service priorities, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably in this article.

[0079] In some examples, UE 115 may also be able to communicate directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol). One or more of the UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in the group may be outside the geographic coverage area 110 of the base station 105, or otherwise unable to receive transmissions from the base station 105. In some examples, a group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system in which each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates resource scheduling for D2D communication. In other cases, D2D communication is performed between UEs 115 without the involvement of the base station 105.

[0080] In some systems, the D2D communication link 135 can be an example of a communication channel between vehicles (e.g., UE 115), such as a sidelink communication channel. In some examples, vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. Vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in a V2X system can communicate with roadside infrastructure (such as roadside units), or communicate with a network using vehicle-to-network (V2N) communication through one or more network nodes (e.g., base station 105), or communicate with both.

[0081] In a 5G wireless communication system, a UE 115 may support sidelink communications with other devices. Sidelink communications may include vehicle-to-everything communications, vehicle-to-vehicle communications, or some combination of these communications. In some cases, these UEs 115 may have multiple TRPs (e.g., multiple transmit and receive chains). Each TRP may have separate transmit and receive chains, thereby enabling these UEs 115 to provide sidelink communications to other UEs 115 individually. These UEs 115 configured with multiple TRPs may provide improvements in resource determination for sidelink communications by configuring these UEs 115 to determine whether two or more peer UEs 115 can be spatially multiplexed on time and frequency resources (e.g., the same resource blocks). In order to mitigate interference between two or more peer UEs 115 that are spatially multiplexed, these UEs 115 may request one or both of the peer UEs 115 to change the transmit power level or provide an MCS restriction (e.g., an MCS threshold). In some implementations, the UEs 115 may additionally or alternatively request that one or both of the peer UEs 115 beamform in one direction (and null some other direction). Thus, the UEs 115 may experience efficient sidelink operation by spatially multiplexing multiple peer UEs 115 and communicating with the peer UEs 115 via multiple TRPs.

[0082] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing or interconnecting packets to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by a base station 105 associated with the core network 130. User IP packets may be delivered through a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to a network operator IP service 150. The operator IP service 150 may include access to the Internet, (multiple) intranets, an IP multimedia subsystem (IMS), or a packet-switched streaming service.

[0083] Some of the network devices, such as base stations 105, may include subcomponents such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with UE 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs). Each access network transmission entity 145 may include one or more antenna panels. In some examples, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs), or merged into a single network device (e.g., base station 105).

[0084] The wireless communication system 100 can operate using one or more radio frequency spectrum bands in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The area from 300 MHz to 3 GHz is called the ultra-high frequency (UHF) area or decimeter band because the wavelength distance is from about 1 decimeter to 1 meter long. Buildings and environmental features may block or redirect UHF waves, but the waves can fully penetrate the structure of the macro cell to provide services to UE 115 located indoors. Compared with the transmission of smaller frequencies and longer waves using the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz, the transmission of UHF waves can be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers).

[0085] The wireless communication system 100 may also operate in a super high frequency (SHF) region using a radio frequency spectrum band from 3 GHz to 30 GHz (also referred to as a centimeter wave band), or an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as a millimeter wave band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between UE 115 and base station 105, and the EHF antennas of each device may be even smaller and more closely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and a shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed between transmissions using one or more different frequency regions, and the designated use of frequency bands across these frequency regions may vary from country to country or regulatory agency.

[0086] The wireless communication system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can employ license assisted access (LAA), unlicensed LTE (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio frequency spectrum band, devices such as base stations 105 and UEs 115 can employ carrier sensing for conflict detection and avoidance. In some examples, operations in unlicensed bands can be based on carrier aggregation configurations together with component carriers operating in licensed bands (e.g., LAA). Operations in unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0087] The base station 105 or UE 115 may be equipped with multiple antennas that may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having multiple rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals sent via the antenna ports.

[0088] The base station 105 or UE 115 can use MIMO communication to exploit multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. This technology can be referred to as spatial multiplexing. For example, multiple signals can be sent by a transmitting device via different antennas or different antenna combinations. Similarly, multiple signals can be received by a receiving device via different antennas or different antenna combinations. Each of the multiple signals can be referred to as a separate spatial stream and can carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers can 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 sent to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are sent to multiple devices.

[0089] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals communicated via antenna elements in an antenna array so that signals propagating in an azimuth relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements can include a transmitting device or a receiving device applying an offset, a phase offset, or both to a signal carried via an antenna element associated with the device. Adjustments associated with each antenna element can be defined by a set of beamforming weights associated with an azimuth (e.g., relative to an antenna array of a transmitting device or a receiving device, or relative to some other direction).

[0090] The base station 105 or the UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform 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 sent multiple times by the base station 105 in different directions, which may include sending signals according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device such as the UE 115) a beam direction for subsequent transmissions or receptions by the base station 105.

[0091] Some signals, such as data signals associated with a 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 on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0092] In some examples, transmissions by a device (e.g., base station 105 or UE 115) may be performed using multiple beam directions, and the device may generate a combined beam for transmission (e.g., from base station 105 to UE 115) using a combination of digital precoding or radio frequency beamforming. UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may send reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)) that may be precoded or unprecoded. UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may employ similar techniques for sending signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by UE 115), or for sending signals in a single direction (e.g., for sending data to a receiving device).

[0093] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from the base station 105, the receiving device (e.g., UE 115) can try multiple reception configurations (e.g., directional listening). For example, the receiving device can try multiple reception directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different reception beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of the antenna array, or processing received signals according to different reception beamforming weight sets applied to signals received at multiple antenna elements of the antenna array, any of which can be referred to as "listening" according to different reception configurations or reception directions. In some examples, the receiving device can use a single reception configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0094] 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 at the bearer or packet data convergence protocol (PDCP) layer may be IP-based. The radio link control (RLC) layer may perform packet segmentation and reassembly to communicate through logical channels. The medium access control (MAC) layer may perform priority processing and multiplex logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmission at the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer may provide the establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or a core network 130 that supports radio bearers for user plane data. At the physical layer (PHY), transport channels may be mapped to physical channels.

[0095] UE 115 and base station 105 can support retransmission of data to increase the possibility of successfully receiving data. Hybrid automatic repeat request (HARQ) feedback is a technology for increasing the possibility of correctly receiving data through communication link 125. HARQ can include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC) and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device can support HARQ feedback for the same time slot, wherein the device can provide HARQ feedback for data received in the previous symbol in the time slot in a specific time slot. In other cases, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0096] Figure 2 An example of a wireless communication system 200 according to various aspects of the present disclosure is illustrated. The wireless communication system 200 can support multiple radio access technologies, including a 4G system such as an LTE system, an LTE-A system, or an LTE-A Pro system, and a 5G system, which can be referred to as an NR system. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. For example, the wireless communication system 200 can support sidelink communications between multiple UEs 215, which can be referenced as Figure 1 Examples of corresponding devices described. Examples of sidelink communications can include V2V communications, V2X communications, etc. The wireless communication system 200 can support improvements in power consumption and, in some examples, can facilitate higher reliability and lower latency sidelink communications, among other benefits.

[0097] One or more UEs 215 in the wireless communication system 200 may be configured with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output communications or beamforming or any combination thereof. The antennas of one or more UEs 215 may be located within one or more antenna arrays or antenna panels, which may support multiple-input multiple-output operations, or transmit or receive beamforming. One or more UEs 215 may have an antenna array with multiple rows and columns of antenna ports, which one or more UEs 215 may use to support beamforming for sidelink communications. Similarly, one or more UEs 215 may have one or more antenna arrays, which may support various multiple-input multiple-output or beamforming operations for sidelink communications. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals sent via one or more antenna ports. Thus, one or more UEs 215 may be configured to support directional sidelink communications using one or more antennas.

[0098] Thus, one or more UEs 215 in the wireless communication system 200 may be configured with a single TRP (e.g., a single transmit and receive chain) or multiple TRPs (e.g., multiple transmit and receive chains). Figure 2 In the example of , UE 215-a can be configured with multiple TRPs, while UE 215-b through UE 215-d can be configured with a single TRP. Figure 2 In an example, UE 215-a can be a vehicle (e.g., a sedan, a coupe) configured with a front antenna panel and a rear antenna panel for sidelink communication with one or more of UE 215-b, UE 215-c, and UE 215-c in a wireless communication system 200 (e.g., a V2V communication system or a V2X communication system, etc.). In some examples, UE 215-a can be different types of vehicles (such as a truck or a trailer) and can be configured with multiple TRPs.

[0099] In some examples, there may be an interval between each of the multiple TRPs associated with UE 215-a. The interval between each TRP may be, for example, a threshold distance. Referring to the example when UE 215-a is a vehicle (e.g., a sedan, a coupe) configured with a front antenna panel and a rear antenna panel, for example, the front antenna panel and the rear antenna panel may be spaced 3 to 4 meters apart. Referring to the example when UE 215-a may be a different type of vehicle (such as a truck or a trailer (e.g., a 16-wheel trailer)), the front antenna panel and the rear antenna panel may have a larger interval, such as 20 meters, for example.

[0100] One or more ports associated with each of the multiple TRPs associated with UE 215-a may monitor the sidelink channel and the sidelink environment differently. For example, each of the multiple TRPs associated with UE 215-a may monitor a separate geographic location but the same or a portion of the processing chain. For example, UE 215-a may monitor a sidelink channel and receive sidelink communications from UE 215-b via a first TRP associated with UE 215-a and a second TRP associated with UE 215-a. In some examples, the sidelink communication may be a reference signal. UE 215-a may measure a reference signal received power (RSRP) or a reference signal received quality (RSRQ) associated with the sidelink communication (e.g., a reference signal), etc. RSRP and RSRQ, etc. may be referred to as sidelink information.

[0101] In some examples, UE 215a-a may determine that sidelink communications received at a first TRP associated with UE 215-a may have an RSRP below an RSRP threshold (e.g., RSRP < RSRP threshold), while sidelink communications received at a second TRP associated with UE 215-a may have an RSRP above the RSRP threshold (e.g., RSRP > RSRP threshold). In some examples, UE 215-a may monitor a sidelink channel and receive sidelink communications from UE 215-d via a first TRP associated with UE 215-a, but due to blocking (e.g., interference) between UE 215-d and the second TRP associated with UE 215-a, UE 215-a may not receive sidelink communications via the second TRP associated with UE 215-a. Figure 2 In the example of , blocking may be due to UE 215-c interfering in a transmission path between UE 215-d and a second TRP associated with UE 215-a. Thus, each of the multiple TRPs associated with UE 215-a may monitor and collect different sidelink information, which may be used to provide improved resource determination for sidelink communications with other UEs 215 (e.g., UE 215-b, UE 215-c, and UE 215-d) in the wireless communication system 200.

[0102] Figure 3An example of a wireless communication system 300 according to various aspects of the present disclosure is shown. The wireless communication system 300 can support multiple radio access technologies, including a 4G system such as an LTE system, an LTE-A system, or an LTE-A Pro system, and a 5G system, which can be referred to as an NR system. In some examples, the wireless communication system 300 can implement aspects of the wireless communication system 100 and the wireless communication system 200. For example, the wireless communication system 300 can support sidelink communications between multiple UEs 315, which can be referenced as Figure 1 and Figure 2 Examples of corresponding devices described. Examples of sidelink communications can include V2V communications, V2X communications, etc. The wireless communication system 300 can support improvements in power consumption and, in some examples, can facilitate higher reliability and lower latency sidelink communications, among other benefits.

[0103] One or more UEs 315 in the wireless communication system 300 may be configured with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output communications, or beamforming, or any combination thereof. The antennas of one or more UEs 315 may be located within one or more antenna arrays or antenna panels, which may support multiple-input multiple-output operations, or transmit or receive beamforming. One or more UEs 315 may have an antenna array with multiple rows and columns of antenna ports, which one or more UEs 315 may use to support beamforming for sidelink communications. Similarly, one or more UEs 315 may have one or more antenna arrays, which may support various multiple-input multiple-output or beamforming operations for sidelink communications. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals sent via one or more antenna ports. Thus, one or more UEs 315 may be configured to support directional sidelink communications using one or more antennas.

[0104] Thus, one or more UEs 315 in the wireless communication system 300 may be configured with a single TRP (e.g., a single transmit and receive chain) or multiple TRPs (e.g., multiple transmit and receive chains). Figure 3In an example of , UE 315-a can be configured with multiple TRPs, while UE 315-b through UE 315-e can be configured with a single TRP. One or more of UE 315 can monitor one or more sidelink channels. In some examples, each of the plurality of UEs 315 can monitor one or more sidelink channels (e.g., channel sensing) during one or more time intervals. For example, each of UE 315-a through 315-e can be configured to monitor one or more sidelink channels during one or more time intervals.

[0105] exist Figure 3 In an example, UE 315-a may monitor one or more sidelink channels and measure RSRP associated with sidelink communications from UE 315-b to UE 315-d. UE 315-a may measure RSRP associated with sidelink communications from UE 315-b to UE 315-d at each of a plurality of TRPs. In some examples, UE 315-a may measure RSRP associated with sidelink communications from UE 315-b at a first TRP associated with UE 315-a. 1，1 , and measuring the RSRP associated with the sidelink communication from UE 315-b at a second TRP associated with UE 315-a 1，2 In some other examples, UE 315-a may measure the RSRP associated with the sidelink communication from UE 315-c at a first TRP associated with UE 315-a. 2，1 , and measuring the RSRP associated with the sidelink communication from UE 315-b at a second TRP associated with UE 315-a 2，2 . Thus, both the first TRP and the second TRP associated with UE 315-a can sense (e.g., receive sidelink communications) with both UE 315-b and UE 315-c. The quality (e.g., link quality) associated with the sidelink channel between UE 315-a (e.g., each TRP associated with UE 315-a) and UE 315-b and UE 315-c can be different.

[0106] In some examples, UE 315-a may measure RSRP associated with sidelink communications from UE 315-b to UE 315-d at one TRP of the plurality of TRPs. For example, UE 315-a may measure RSRP associated with sidelink communications from UE 315-d at a second TRP associated with UE 315-a. 3，2, but the RSRP associated with the sidelink communication from UE 315-d may not be measured at the first TRP associated with UE 315-a because the first TRP may not be in the transmission path of the sidelink communication from UE 315-d, or there may be congestion between the first TRP associated with UE 315-a and UE 315-d. In some other examples, UE 315-a may measure the RSRP associated with the sidelink communication from UE 315-e at the first TRP associated with UE 315-a. 4，1 . Similarly, UE 315-a may not measure the RSRP associated with the sidelink communication from UE 315-e at the second TRP associated with UE 315-a because the second TRP may not be in the transmission path of the sidelink communication from UE 315-e, or there may be congestion between the second TRP associated with UE 315-a and UE 315-e. Therefore, UE 315-a may sense UE 315-d via the second TRP associated with UE 315-a, and UE 315-a may sense UE 315-e via the first TRP associated with UE 315-a.

[0107] UE 315-a may determine to jointly allocate resources in both the time domain and the frequency domain for sidelink communications with two or more of UE 315-b through UE 315-e based in part on measured RSRP associated with two or more of UE 315-b through UE 315-e. For example, UE 315-a may determine to jointly allocate resources in both the time domain and the frequency domain based in part on measured RSRP associated with two or more of UE 315-b through UE 315-e. 2，1 <a*RSRP 1，1 And SRP 1，2 <a*RSRP 2，2 To determine to co-allocate UE 315-b and UE 315-c in both the time domain and the frequency domain, where a is a weighting factor. In some examples, UE 315-a may determine to co-allocate UE 315-b and UE 315-c orthogonally in the time domain and the frequency domain. For example, UE 315-a may perform space-division multiplexing (also known as spatial-division multiplexing).

[0108] In some examples, UE 315-a can determine to jointly allocate UE 315-b and UE 315-c in both the time domain and the frequency domain by controlling the transmit power of one or both of UE 315-b and UE 315-c. UE 315-a can receive sidelink communications from UE 315-d and UE 315-e on the same time and frequency resources. UE 315-a can send a power control request message (e.g., RRC signaling) to UE 315-b and UE 315-c. The power control request message can instruct UE 315-b and UE 315-c to transmit sidelink communications according to the transmit power level indicated in the power control request message, or to adjust (e.g., reduce, increase) the transmit power level with a value (e.g., a transmit power level reduction value, a transmit power level increase value). The transmit power level can cause RSRP 2，1 <a*RSRP 1，1 And RSRP 1，2 <a*RSRP 2，2 . In some examples, UE 315-a may also send an MCS request message indicating an MCS restriction (e.g., an MCS threshold) so that UE 315-b and UE 315-c can use any MCS equal to or lower than the MCS threshold.

[0109] Figure 4 An example of a wireless communication system 400 according to various aspects of the present disclosure is illustrated. The wireless communication system 400 may support a variety of radio access technologies, including a 4G system such as an LTE system, an LTE-A system, or an LTE-A Pro system, and a 5G system, which may be referred to as an NR system. In some examples, the wireless communication system 400 may implement aspects of the wireless communication system 100, the wireless communication system 200, and the wireless communication system 300. For example, the wireless communication system 400 may support sidelink communications between multiple UEs 415, which may be referenced to Figures 1 to 3 Examples of corresponding devices described. Examples of sidelink communications can include V2V communications, V2X communications, etc. The wireless communication system 300 can support improvements in power consumption and, in some examples, can facilitate higher reliability and lower latency sidelink communications, among other benefits.

[0110] One or more UEs 315 in the wireless communication system 400 may be configured with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output communications or beamforming or any combination thereof. The antennas of one or more UEs 415 may be located within one or more antenna arrays or antenna panels, which may support multiple-input multiple-output operations, or transmit or receive beamforming. One or more UEs 415 may have an antenna array with multiple rows and columns of antenna ports, which one or more UEs 415 may use to support beamforming for sidelink communications. Similarly, one or more UEs 415 may have one or more antenna arrays, which may support various multiple-input multiple-output or beamforming operations for sidelink communications. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals sent via one or more antenna ports. Thus, one or more UEs 415 may be configured to support directional sidelink communications using one or more antennas. Thus, one or more UEs 415 in the wireless communication system 400 may be configured with a single TRP (e.g., a single transmit and receive chain) or multiple TRPs (e.g., multiple transmit and receive chains). Figure 4 In the example of , UE 415-a can be configured with multiple TRPs, while UE 415-b through UE 415-e can be configured with a single TRP. One or more UEs 415 in the wireless communication system 400 can be configured to support beamforming for sidelink communications. For example, UE 415-a can support beamforming for sidelink communications with UE 415-b through UE 415-e.

[0111] In some examples, UE 415-a can determine resource allocations for sidelink communications with UE 415-b to UE 415-e. For example, UE 415-a can send and receive sidelink communications to or from UE 415-b to UE 415-e based on resource allocations corresponding to resource grid 405 and resource grid 410. Resource grid 405 can correspond to a first TRP associated with UE 415-a, and resource grid 410 can correspond to a second TRP associated with UE 415-a. Resource grid 405 and resource grid 410 can refer to a combination of frequency resources (e.g., subcarriers, carriers) and time resources (e.g., symbols, mini-slots, time slots, subframes, frames). In some cases, when UE 415-a determines resource allocations without beamforming isolation and power control, UE 415-a can send and receive sidelink communications based on resource grid 420. Resource grid 420 may refer to a combination of frequency resources (eg, subcarriers, carriers) and time resources (eg, symbols, mini-slots, slots, subframes, frames).

[0112] exist Figure 4 In some examples, UE 415-a may determine and generate directional beams toward UE 415-b and UE 415-e using a first TRP associated with UE 415-a. Thus, resource grid 405 may correspond to resource allocations for directional beams toward UE 415-b and UE 415-e. In some examples, UE 415-a may determine and generate directional beams toward UE 415-c and UE 415-d using a second TRP associated with UE 415-a. Thus, resource grid 410 may correspond to resource allocations for directional beams toward UE 415-c and UE 415-d. In some examples, UE 415-a may send a beamforming request message to one or more of UE 415-b to UE 415-e to perform beamforming toward a first TRP associated with UE 415-a or a second TRP associated with UE 415-a. In some examples, UE 415-a may send a beamforming request message to one or more of UE 415-b to UE 415-e to perform beamforming toward UE 415-a based in part on one or more of UE 415-b to UE 415-e being configured to support beamforming.

[0113] Thus, UE 415-a may determine (e.g., allocate, assign) resource allocations for one or more of UE 415-b to UE 415-e in the time domain, frequency domain, and spatial domain using beamforming. In some examples, UE 415-a may be configured to provide power control for one or more of UE 415-b to UE 415-e to mitigate interference in the wireless communication system 400. By supporting beam-based isolation plus power control, UE 415-a may experience reduced latency associated with reception of sidelink communications. UE 415-a also experiences improved resource utilization for sidelink communications.

[0114] Figure 5 1 illustrates an example of a protocol stack 500 according to various aspects of the present disclosure. A device may be configured with the protocol stack 500. The device may be Figures 1 to 4 The protocol stack 500 may include an RRC layer 505, a MAC layer 510, and a PHY layer 515. Each of these layers may communicate with each other directly or indirectly (e.g., via one or more buses). The protocol stack 500 may support sidelink communications between multiple UEs, which may be referenced separately. Figures 1 to 4 Examples of the corresponding devices described. Examples of sidelink communications may include V2V communications, V2X communications, and the like.

[0115] The RRC layer 505 may be as described in reference Figure 1 The establishment, configuration and maintenance of a connection (e.g., a sidelink connection) between a multi-TRP UE 115 and a peer UE 115, or between a multi-TRP UE 115 and a base station 105 or a core network 130 supporting a radio bearer for user plane data are provided, respectively. The MAC layer 510 may perform priority processing and multiplexing of logical channels to transmission channels. The MAC layer 510 may also support retransmission at the MAC layer to improve link efficiency (e.g., sidelink efficiency) using error detection techniques, error correction techniques, or both.

[0116] The PHY layer 515 may map a transport channel to a physical channel. The physical channel may be a physical sidelink channel, such as a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), a physical sidelink discovery channel (PSDCH), or a physical sidelink broadcast channel (PSBCH). In some examples, the PHY layer 515 may include a baseband 520 and a baseband 525. The baseband 520 may be mapped to one or more ports 530, and the baseband 525 may be mapped to one or more ports 535.

[0117] A multi-TRP UE may collect sidelink information associated with a peer UE on one or both of port 530 and port 535. For example, a multi-TRP UE may collect RSRP information associated with one or more peer UEs on one or both of port 530 and port 535. A multi-TRP UE may collect sidelink information in an omnidirectional manner or in a beamforming manner or both. In some examples, port 530 may correspond to one TRP of a multi-TRP UE, and port 535 may correspond to another TRP of a multi-TRP UE. Each TRP may have a separate transmitter and receiver chain. In some examples, the RRC layer 505, the MAC layer 510, and the PHY layer 515 may correspond to common processing of the UE, while the baseband 520, the baseband 525, the port 530, and the port 535 may correspond to separate RF and digital processing. In other words, some digital processing and upper layer functions are common. The RF chain and part of the baseband are separated, and some PHY layer processes, MAC layer, and RRC layer processes are common.

[0118] Figure 6 An example of a process flow 600 according to various aspects of the present disclosure is illustrated. The process flow 600 may be implemented by referring to Figures 1 to 4Aspects of the wireless communication systems 100, 200, 300, and 400 described herein. For example, the process flow 600 may be based on the configuration of the UE 615 and implemented by the UE 615 to reduce power consumption, improve resource utilization of sidelink communications, and promote low latency for sidelink communications, among other advantages. The UE 615 may be as described in reference Figures 1 to 5 Examples of UEs described.

[0119] In process flow 600, one or more UEs 615 may be configured with a single TRP (e.g., a single transmit and receive chain) or multiple TRPs (e.g., multiple transmit and receive chains). Figure 6 In the example of , UE 615-a can be configured with multiple TRPs (e.g., a UE with multiple TRPs enabled), while UE 615-b and UE 615-c can be configured with a single TRP. In the following description of process flow 600, operations between UE 615-a, UE 615-b, and UE 615-c can be sent in an order different from the example order shown, or operations performed by UE 615-a, UE 615-b, and UE 615-c can be performed in a different order or at a different time. Some operations can also be omitted from process flow 600, or other operations can be added to process flow 600.

[0120] At 620, one or more of UE 615-a, UE 615-b, and UE 615-c may perform channel sensing by monitoring one or more sidelink channels using one or more TRPs associated with UE 615-a, UE 615-b, and UE 615-c. In some examples, UE 615-a may determine whether UE 615-b and UE 615-c may be co-allocated in the time domain and the frequency domain. For example, UE 615-a may determine resources for both UE 615-b and UE 615-c based in part on sidelink information associated with UE 615-b and UE 615-c. The resources may be the same resource blocks (e.g., the same time and frequency resource blocks). In some examples, UE 615-a may determine to spatially multiplex sidelink communications for UE 615-b and UE 615-c based in part on sidelink information associated with UE 615-b and UE 615-c. The sidelink information may include an RSRP indicator or an RSRQ indicator or both.

[0121] At 625, UE 615-a may send a first power control request message to UE 615-b. At 630, UE 615-a may send a second power control request message to UE 615-c. The first power control request message and the second power control request message may be RRC messages. If one or both of UE 615-b and UE 615-c reduce the transmit power level, UE 615-a may send the first power control request message and the second power control request message based in part on determining that UE 615-b and UE 615-c may be multiplexed in the spatial domain. Thus, the first power control request message or the second power control request message or both may include an indication of a transmit power parameter to adjust the transmit power value of one or both of UE 615-b and UE 615-c. The transmit power value may be referred to as a preferred transmit power level, a transmit power reduction value, or a transmit power increment value.

[0122] In some examples, UE 615-a may send a first power control request message to UE 615-b via a first TRP associated with UE 615-a, and send a second power control request message to UE 615-c via a second TRP associated with UE 615-a, the second TRP being different from the first TRP associated with UE 615-a. In some other examples, UE 615-a may send a first power control request message to UE 615-b and send a second power control request message to UE 615-c using the same TRP among multiple TRPs associated with UE 615-a. In some examples, UE 615-a may send a first power control request message to UE 615-b via a first directional beam, and send a second power control request message to UE 615-c via a second directional beam that is different from the first directional beam.

[0123] In some examples, UE 615-a may additionally or alternatively determine that one or both of UE 615-b and UE 615-c are capable of beamforming. In order to reduce or eliminate interference to sidelink transmissions from other UEs, UE 615-a may also send a beam modification request message to one or both of UE 615-b and UE 615-c. The beam modification request message may include an indication of one or more directional beams to be used for sidelink communication (e.g., sidelink transmission). In some other examples, the beam modification request message may include an indication of one or more directional beams that should be activated or deactivated (e.g., turned on or off). In other examples, the beam modification request message may include an indication of setting a transmit power value (e.g., maximum transmit power) that can be used for one or more directional beams. UE 615-a may combine the request with a power control request. For example, UE 615-a may indicate one or more of a preferred transmit power level, a transmit power reduction value, or a transmit power increment value for each directional beam. One or both of UE 615-b and UE 615-c may respond with a beam modification response message indicating that UE 615-b and UE 615-c accept or reject the beam modification request. In some examples, when one or both of UE 615-b and UE 615-c reject the beam modification request, UE 615-a may back off on the power control request. In other words, if UE 615-b and UE 615-c reject the beam modification request, UE 615-a may use the power control request to co-allocate UE 615-b and UE 615-c.

[0124] At 635, UE 615-b may send a first power control response message to UE 615-a. At 640, UE 615-c may send a second power control response message to UE 615-a. One or both of UE 615-b and UE 615-c may receive the first power control request message and the second power control request message from UE 615-a, and determine whether to accept or reject the preferred transmit power level, transmit power reduction value, or transmit power increase value indicated by the transmit power parameters in the first power control request message and the second power control request message. Therefore, one or both of UE 615-b and UE 615-c may accept the preferred transmit power level, transmit power reduction value, or transmit power increase value, and send a power control response message indicating the acceptance. Alternatively, one or both of UE 615-b and UE 615-c may reject the preferred transmit power level, transmit power reduction value, or transmit power increase value and send a power control response message indicating the rejection (e.g., indicating that one or both of UE 615-b and UE 615-c are unwilling to adjust the transmit power level).

[0125] At 645, one or more of UE 615-a, UE 615-b, and UE 615-c may determine time and frequency resources for sidelink communications. In some examples, UE 615-a may determine time and frequency resources for sidelink communications with UE 615-b and UE 615-c based in part on a first power control response message and a second power control response message. Thus, UE 615-a may multiplex sidelink communications from UE 615-b and UE 615-c on time and frequency resources, wherein the multiplexing is space division multiplexing. If both UE 615-b and UE 615-c accept the power control request, UE 615-a may send sidelink control information (SCI) for sidelink data to one or both of UE 615-b and UE 615-c. At 650, UE 615-b may send sidelink communications (e.g., sidelink data) to UE 615-a on time and frequency resources. At 655, UE 615-c may send a sidelink communication (e.g., sidelink data) to UE 615-a on the time and frequency resources.

[0126] Figure 7 An example of a process flow 700 according to various aspects of the present disclosure is shown. The process flow 700 may be implemented by referring to Figures 1 to 4 Aspects of the wireless communication systems 100, 200, 300, and 400 described herein. For example, the process flow 700 may be based on the configuration of the UE 715 and implemented by the UE 715 to reduce power consumption, improve resource utilization of sidelink communications, and promote low latency for sidelink communications, among other advantages. The UE 715 may be as described in reference Figures 1 to 5 Examples of UEs described.

[0127] In process flow 700, one or more UEs 715 may be configured with a single TRP (e.g., a single transmit and receive chain) or multiple TRPs (e.g., multiple transmit and receive chains). Figure 7In the example of , UE 715-a can be configured with multiple TRPs (e.g., a UE with multiple TRPs enabled), while UE 715-b and UE 715-c can be configured with a single TRP. In the following description of process flow 700, operations between UE 715-a, UE 715-b, and UE 715-c can be sent in an order different from the example order shown, or operations performed by UE 715-a, UE 715-b, and UE 715-c can be performed in a different order or at different times. Some operations can also be omitted from process flow 700, or other operations can be added to process flow 700.

[0128] At 720, one or more of UE 715-a, UE 715-b, and UE 715-c may perform channel sensing by monitoring one or more sidelink channels using one or more TRPs associated with UE 715-a, UE 715-b, and UE 715-c. In some examples, UE 715-a may determine whether UE 715-b and UE 715-c may be co-allocated in the time domain and the frequency domain. For example, UE 715-a may determine resources for both UE 715-b and UE 715-c based in part on sidelink information associated with UE 715-b and UE 715-c. The resources may be the same resource blocks (e.g., the same time and frequency resource blocks). In some examples, UE 715-a may determine to spatially multiplex sidelink communications for UE 715-b and UE 715-c based in part on sidelink information associated with UE 715-b and UE 715-c. The sidelink information may include an RSRP indicator or an RSRQ indicator or both.

[0129] At 725, UE 715-a may send a first power control request message to UE 715-b. At 730, UE 715-a may send a second power control request message to UE 715-c. The first power control request message and the second power control request message may be RRC messages. If one or both of UE 715-b and UE 715-c reduce the transmit power level, UE 715-a may send the first power control request message and the second power control request message based in part on determining that UE 715-b and UE 715-c may be multiplexed in the spatial domain. Thus, the first power control request message or the second power control request message or both may include an indication of a transmit power parameter to adjust the transmit power value of one or both of UE 715-b and UE 715-c. The transmit power value may be referred to as a preferred transmit power level, a transmit power reduction value, or a transmit power increment value.

[0130] In some examples, UE 715-a may send a first power control request message to UE 715-b via a first TRP associated with UE 715-a, and send a second power control request message to UE 715-c via a second TRP associated with UE 715-a, the second TRP being different from the first TRP associated with UE 715-a. In some other examples, UE 715-a may send a first power control request message to UE 715-b and send a second power control request message to UE 715-c using the same TRP among multiple TRPs associated with UE 715-a. In some examples, UE 715-a may send a first power control request message to UE 715-b via a first directional beam, and send a second power control request message to UE 715-c via a second directional beam that is different from the first directional beam.

[0131] At 735, UE 715-b may send a first power control response message to UE 715-a. At 740, UE 715-c may send a second power control response message to UE 715-a. One or both of UE 715-b and UE 715-c may receive the first power control request message and the second power control request message from UE 715-a and determine whether to accept or reject the preferred transmit power level, transmit power reduction value, or transmit power increase value indicated by the transmit power parameters in the first power control request message and the second power control request message.

[0132] One or both of UE 715-b and UE 715-c may accept the preferred transmit power level, transmit power reduction value, or transmit power increase value, and send a power control response message indicating the acceptance. Alternatively, one or both of UE 715-b and UE 715-c may reject the preferred transmit power level, transmit power reduction value, or transmit power increase value, and send a power control response message indicating the rejection (e.g., indicating that one or both of UE 715-b and UE 715-c are unwilling to adjust the transmit power level). Figure 7 In the example of , UE 715-b may reject the preferred transmit power level, transmit power reduction value, or transmit power increase value and indicate the rejection in the power control response message. Figure 7 In the example of , UE 715-c can accept the preferred transmit power level, the transmit power reduction value, or the transmit power increase value and indicate the acceptance in the power control response message.

[0133] In some examples, if one or both of UE 715-b and UE 715-c reject the power control request from UE 715-a, UE 715-a may send an MCS request message including an MCS limit, which may be a threshold MCS (e.g., maximum MCS, minimum MCS). Figure 7 In the example of , UE 715-a may send an MCS request message to UE 715-c. The MCS request message may include an indication of the maximum MCS that UE 715-c may send. At 750, UE 715-c may send an MCS response message to UE 715-a. Figure 7 In the example of , the MCS response message may include an indication that UE 715-c rejects the MCS restriction. In this case, UE 715-a cannot jointly allocate time and frequency resources for UE 715-b and UE 715-c across multiple TRPs.

[0134] Figure 8 An example of a process flow 800 according to various aspects of the present disclosure is shown. The process flow 800 may be implemented by referring to Figures 1 to 4 Aspects of the wireless communication systems 100, 200, 300, and 400 described herein. For example, the process flow 800 may be based on the configuration of the UE 815 and implemented by the UE 815 to reduce power consumption, improve resource utilization of sidelink communications, and promote low latency for sidelink communications, among other advantages. The UE 815 may be as described in reference Figures 1 to 5 Examples of UEs described.

[0135] In process flow 800, one or more UEs 815 may be configured with a single TRP (e.g., a single transmit and receive chain) or multiple TRPs (e.g., multiple transmit and receive chains). Figure 8 In the example of , UE 815-a can be configured with multiple TRPs (e.g., a UE with multiple TRPs enabled), while UE 815-b and UE 815-c can be configured with a single TRP. In the following description of process flow 800, operations between UE 815-a, UE 815-b, and UE 815-c can be sent in an order different from the example order shown, or operations performed by UE 815-a, UE 815-b, and UE 815-c can be performed in a different order or at different times. Some operations can also be omitted from process flow 800, or other operations can be added to process flow 800.

[0136] At 820, one or more of UE 815-a, UE 815-b, and UE 815-c may perform channel sensing by monitoring one or more sidelink channels using one or more TRPs associated with UE 815-a, UE 815-b, and UE 815-c. In some examples, UE 815-a may determine whether UE 815-b and UE 815-c may be co-allocated in the time domain and the frequency domain. 。 For example, UE 815-a may determine resources for both UE 815-b and UE 815-c based in part on sidelink information associated with UE 815-b and UE 815-c. The resources may be the same resource blocks (e.g., the same time and frequency resource blocks). In some examples, UE 815-a may determine to spatially multiplex sidelink communications of UE 815-b and UE 815-c based in part on sidelink information associated with UE 815-b and UE 815-c. The sidelink information may include an RSRP indicator or an RSRQ indicator or both.

[0137] At 825, UE 815-a may send a first power control request message to UE 815-b. At 830, UE 815-a may send a second power control request message to UE 815-c. The first power control request message and the second power control request message may be RRC messages. If one or both of UE 815-b and UE 815-c reduce the transmit power level, UE 815-a may send the first power control request message and the second power control request message based in part on determining that UE 815-b and UE 815-c may be multiplexed in the spatial domain. Thus, the first power control request message or the second power control request message or both may include an indication of a transmit power parameter to adjust the transmit power value of one or both of UE 815-b and UE 815-c. The transmit power value may be referred to as a preferred transmit power level, a transmit power reduction value, or a transmit power increment value.

[0138] In some examples, UE 815-a may send a first power control request message to UE 815-b via a first TRP associated with UE 815-a, and send a second power control request message to UE 815-c via a second TRP associated with UE 815-a, the second TRP being different from the first TRP associated with UE 815-a. In some other examples, UE 815-a may send a first power control request message to UE 815-b and send a second power control request message to UE 815-c using the same TRP among multiple TRPs associated with UE 815-a. In some examples, UE 815-a may send a first power control request message to UE 815-b via a first directional beam, and send a second power control request message to UE 815-c via a second directional beam that is different from the first directional beam.

[0139] At 835, UE 815-b may send a first power control response message to UE 815-a. At 840, UE 815-c may send a second power control response message to UE 815-a. One or both of UE 815-b and UE 815-c may receive the first power control request message and the second power control request message from UE 815-a and determine whether to accept or reject the preferred transmit power level, transmit power reduction value, or transmit power increase value indicated by the transmit power parameters in the first power control request message and the second power control request message.

[0140] One or both of UE 815-b and UE 815-c may accept the preferred transmit power level, transmit power reduction value, or transmit power increase value, and send a power control response message indicating the acceptance. Alternatively, one or both of UE 815-b and UE 815-c may reject the preferred transmit power level, transmit power reduction value, or transmit power increase value, and send a power control response message indicating the rejection (e.g., indicating that one or both of UE 815-b and UE 815-c are unwilling to adjust the transmit power level). Figure 8 In the example of , UE 815-b may reject the preferred transmit power level, transmit power reduction value, or transmit power increase value and indicate the rejection in the power control response message. Figure 8 In the example of , UE 815-c can accept the preferred transmit power level, the transmit power reduction value, or the transmit power increase value and indicate the acceptance in the power control response message.

[0141] In some examples, if one or both of UE 815-b and UE 815-c reject the power control request from UE 815-a, UE 815-a may send an MCS request message including an MCS limit, which may be a threshold MCS (e.g., maximum MCS, minimum MCS). At 845, Figure 8 In the example of , UE 815-a may send an MCS request message to UE 815-c. The MCS request message may include an indication of the maximum MCS that UE 815-c may send. At 850, UE 815-c may send an MCS response message to UE 815-a. Figure 8 In an example, the MCS response message may include an indication that UE 815-c accepts the MCS restriction. In some examples, if UE 815-c rejects the MCS restriction request, UE 815-a may send another MCS restriction request with a lower or higher MCS restriction to UE 815-c. In this case, UE 815-a may jointly allocate time and frequency resources for UE 815-b and UE 815-c across multiple TRPs based on the MCS restrictions negotiated with UE 815-c.

[0142] In some examples, if UE 815-c accepts the MCS restriction request, UE 815-a may send another power control request message with a different transmit power (e.g., a higher transmit power value) to UE 815-b that rejected the first power control request. At 855, UE 815-a may send a third power control request message to UE 815-b. At 860, UE 815-b may send a third power control response message to UE 815-a. The third power control request message may include an indication of a different transmit power value (e.g., a higher or lower preferred transmit power level, a transmit power reduction value, or a transmit power increase value).

[0143] exist Figure 8 In the example of , UE 815-b can accept different transmit power values, and therefore, UE 815-a can multiplex sidelink communications from UE 815-b and UE 815-c on time and frequency resources, where the multiplexing is space division multiplexing. If both UE 815-b and UE 815-c accept the power control request or the MCS restriction request or both, UE 815-a can send the SCI of the sidelink data to one or both of UE 815-b and UE 815-c. Figure 6As described in the description, UE 815-b can send sidelink communications (e.g., sidelink data) to UE 815-a on time and frequency resources, and UE 815-c can send sidelink communications (e.g., sidelink data) to UE 815-a on time and frequency resources.

[0144] Fig. 9 An example of a process flow 900 according to various aspects of the present disclosure is shown. The process flow 900 may be implemented by referring to Figures 1 to 4 Aspects of the wireless communication systems 100, 200, 300, and 400 described herein. For example, the process flow 900 may be based on the configuration of the UE 915 and implemented by the UE 915 to reduce power consumption, improve resource utilization of sidelink communications, and promote low latency for sidelink communications, among other advantages. The UE 915 may be as described in reference Figures 1 to 5 Examples of UEs described.

[0145] In process flow 900, one or more UEs 915 may be configured with a single TRP (e.g., a single transmit and receive chain) or multiple TRPs (e.g., multiple transmit and receive chains). Fig. 9 In the example of , UE 915-a can be configured with multiple TRPs (e.g., a UE with multiple TRPs enabled), while UE 915-b and UE 915-c can be configured with a single TRP. In the following description of process flow 900, operations between UE 915-a, UE 915-b, and UE 915-c can be sent in an order different from the example order shown, or operations performed by UE 915-a, UE 915-b, and UE 915-c can be performed in a different order or at different times. Some operations can also be omitted from process flow 900, or other operations can be added to process flow 900.

[0146] At 920, one or more of UE 915-a, UE 915-b, and UE 915-c may perform channel sensing by monitoring one or more sidelink channels using one or more TRPs associated with UE 915-a, UE 915-b, and UE 915-c. In some examples, UE 915-a may determine whether UE 915-b and UE 915-c may be co-allocated in the time domain and the frequency domain. For example, UE 915-a may determine resources for both UE 915-b and UE 915-c based in part on sidelink information associated with UE 915-b and UE 915-c. The resources may be the same resource blocks (e.g., the same time and frequency resource blocks). In some examples, UE 915-a may determine to spatially multiplex sidelink communications for UE 915-b and UE 915-c based in part on sidelink information associated with UE 915-b and UE 915-c. The sidelink information may include an RSRP indicator or an RSRQ indicator or both.

[0147] exist Fig. 9 In the example of , UE 915-a may send a power control request message to both UE 915-b and UE 915-c. However, UE 915-b may send a power control response message accepting the power control request from UE 915-a, while UE 915-c may send a power control response message rejecting the power control request from UE 915-a. Therefore, UE 915-a may negotiate a transmit power value with UE 915-c. For example, at 925, UE 915-a may send a first power control request message to UE 915-c, which may include an indication of a transmit power value (P0). At 930, UE 915-c may send a first power control response message to UE 915-a that still rejects the transmit power value (P0).

[0148] At 935, UE 915-a may send a second power control request message to UE 915-c, the second power control request message including an indication of the adjusted transmit power value (P0+3dB). The adjusted transmit power value may be incremented or decremented by a value (e.g., ±3dB) by UE 915-a, or may be incremented or decremented by a multiple of the value (e.g., n*3dB). At 940, UE 915-c may send a second power control response message to UE 915-a that still rejects the adjusted transmit power value (P0+3dB).

[0149] At 945, UE 915-a may send a third power control request message to UE 915-c, the third power control request message including an indication of another adjusted transmit power value (P0+n*3dB). The adjusted transmit power value may be incremented or decremented by a multiple of the value (e.g., n*3dB) by UE 915-a. At 950, UE 915-c may send a third power control response message to UE 915-a accepting the adjusted transmit power value (P0+n*3dB). Thus, UE 915-a may resend the power control request with an updated preferred transmit power value, etc., until UE 915-c accepts the preferred transmit power value. Additionally, UE 915-a may increase the preferred transmit power value by a value (e.g., 3dB) in each consecutive power control request. Thus, if the power control request is rejected, UE 915-a can update and resend the power control request until the increased transmit power value still benefits UE 915-c.

[0150] In some examples, once a power control agreement is reached between UE 915-a and UE 915-c, UE 915-a may send an MCS request message to UE 915-b at 955. The MCS request message may include an indication of MCS limits based on a transmit power value negotiated between UE 915-a and UE 915-c. At 960, UE 915-b may send an MCS response message to UE 915-a. Thus, peer UEs such as UE 915-b and UE 915-c that agree on quality of service (QoS) may be co-allocated (e.g., spatial division multiplexing).

[0151] Fig.10 1000 is a block diagram of a device 1005 according to various aspects of the present disclosure. The device 1005 may be an example of various aspects of the UE 115 as described herein. For example, as described in reference Figures 1 to 9 As described, the device 1005 may be configured with a single TRP or multiple TRPs. The device 1005 may include a receiver 1010, a UE communication manager 1015, and a transmitter 1020. The device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0152] The receiver 1010 may receive information associated with various information channels (e.g., control channels, data channels, and information related to techniques for determining sidelink resources, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 1005. The receiver 1010 may be a reference Fig.13 Examples of various aspects of the described transceiver 1320. The receiver 1010 may utilize a single antenna or a collection of antennas.

[0153] The communication manager 1015 described herein may be implemented to achieve one or more potential improvements. One implementation may allow the device 1005 to reduce latency for sidelink communications in a wireless communication system (such as a 5G system). Another implementation may allow the device 1005 to improve resource utilization for sidelink communications with two or more peer devices by determining time and frequency resources for the two or more peer devices and performing spatial division multiplexing on the determined time and frequency resources. Another implementation may allow the device 1005 to save sidelink resources (e.g., time and frequency resources) and battery life of the device 1005.

[0154] The UE communication manager 1015 may send a first power control request message to a first peer UE using a first TRP among at least two TRPs associated with the UE, and send a second power control request message to a second peer UE using a first TRP or a second TRP among at least two TRPs associated with the UE, in response to the sending, receive a first power control response message from the first peer UE using the first TRP of the UE, and receive a second power control response message from the second peer UE using the first TRP or the second TRP of the UE, and determine time and frequency resources for sidelink communication with the first peer UE and the second peer UE based on the received first power control response message and the received second power control response message.

[0155] The UE communications manager 1015 may also receive a power control request message from a peer UE, the power control request message including an indication of a transmit power value for the UE, the peer UE having multiple TRPs, based on the receipt, send a power control response message from the peer UE, and send a sidelink communication to the peer UE based on the transmit power value. The UE communications manager 1015 may be an example of aspects of the UE communications manager 1310 described herein.

[0156] The UE communication manager 1015 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or in any combination thereof. If implemented in code executed by a processor, the functions of the UE communication manager 1015 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, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0157] The UE communication manager 1015 or its subcomponents may be physically located at various locations, including portions that are distributed so that functions 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 1015 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the UE communication manager 1015 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0158] Transmitter 1020 can transmit signals generated by other components of device 1005. In some examples, transmitter 1020 can be co-located with receiver 1010 in a transceiver module. For example, transmitter 1020 can be a reference Fig.13 Examples of various aspects of the described transceiver 1320. The transmitter 1020 may utilize a single antenna or a collection of antennas.

[0159] Fig.11 A block diagram 1100 of a device 1105 according to various aspects of the present disclosure is shown. The device 1105 may be an example of aspects of the device 1005 or UE 115 as described herein. For example, as described in reference Figures 1 to 9 As described, the device 1105 may be configured with a single TRP or multiple TRPs. The device 1105 may include a receiver 1110, a UE communication manager 1115, and a transmitter 1135. The device 1105 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0160] The receiver 1110 may receive information associated with various information channels (e.g., control channels, data channels, and information related to techniques for determining sidelink resources, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 1105. The receiver 1110 may be a reference Fig.13 Examples of various aspects of the described transceiver 1320. The receiver 1110 may utilize a single antenna or a collection of antennas.

[0161] UE communication manager 1115 may be an example of aspects of UE communication manager 1015 described herein. UE communication manager 1115 may include power component 1120, resource component 1125, and sidelink component 1130. UE communication manager 1115 may be an example of aspects of UE communication manager 1310 described herein.

[0162] The power component 1120 may send a first power control request message to a first peer UE using a first TRP of at least two TRPs associated with the UE, and send a second power control request message to a second peer UE using a first TRP or a second TRP of at least two TRPs associated with the UE, and in response to sending, receive a first power control response message from the first peer UE using the first TRP of the UE, and receive a second power control response message from the second peer UE using the first TRP of the UE or the second TRP of the UE. The resource component 1125 may determine time and frequency resources for sidelink communications with the first peer UE and the second peer UE based on the received first power control response message and the received second power control response message.

[0163] Power component 1120 can receive a power control request message from a peer UE, the power control request message including an indication of a transmit power value for the UE, the peer UE having multiple TRPs, and based on receiving, send a power control response message from the peer UE. Sidelink component 1130 can send a sidelink communication to the peer UE based on the transmit power value.

[0164] Transmitter 1135 can transmit signals generated by other components of device 1105. In some examples, transmitter 1135 can be co-located with receiver 1110 in a transceiver component. For example, transmitter 1135 can be a reference Fig.13 Examples of various aspects of the described transceiver 1320. The transmitter 1135 may utilize a single antenna or a collection of antennas.

[0165] Fig.12 A block diagram 1200 of a UE communication manager 1205 is shown in accordance with various aspects of the present disclosure. The UE communication manager 1205 may be an example of aspects of the UE communication manager 1015, the UE communication manager 1115, or the UE communication manager 1310 described herein. The UE communication manager 1205 may include a power component 1210, a resource component 1215, a multiplexing component 1220, a sidelink component 1225, a modulation component 1230, and a beamforming component 1235. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

[0166] The power component 1210 may send a first power control request message to a first peer UE using a first TRP of at least two TRPs associated with the UE, and send a second power control request message to a second peer UE using a first TRP or a second TRP of at least two TRPs associated with the UE. In some examples, the power component 1210 may receive a first power control response message from the first peer UE using the first TRP of the UE in response to sending, and receive a second power control response message from the second peer UE using the first TRP or the second TRP of the UE. In some examples, the power component 1210 may receive a power control request message from the peer UE, the power control request message including an indication of a transmit power value for the UE, the peer UE having multiple TRPs. In some examples, the power component 1210 may send a power control response message from the peer UE based on receiving.

[0167] In some examples, power component 1210 may determine a first transmit power value for the first peer UE and a second transmit power value for the second peer UE based on sidelink information associated with the first peer UE and the second peer UE, wherein the first transmit power value is different from the second transmit power value. In some examples, power component 1210 may determine that the first peer UE accepts the first transmit power value and the second peer UE accepts the second transmit power value based on the first power control response message and the second power control response message, wherein determining the time and frequency resources for sidelink communication with the first peer UE and the second peer UE is based on the first peer UE accepting the first transmit power value and the second peer UE accepting the second transmit power value.

[0168] In some examples, the power component 1210 may send a third power control request message to the first peer UE using the first TRP of the UE based on the first MCS response message indicating that the second peer UE accepts the first MCS restriction. In some examples, the power component 1210 may receive a third power control response message from the first peer UE using the first TRP of the UE based on the third power control request message. In some examples, the power component 1210 may determine that the first peer UE accepts the first transmit power value and the second peer UE rejects the second transmit power value based on the first power control response message and the second power control response message. In some examples, the power component 1210 may determine a third transmit power value different from the second transmit power value based on the second peer UE rejecting the second transmit power value.

[0169] In some examples, power component 1210 may resend a second power control request message to a second peer UE using a second TRP of the UE based on a second power control response message indicating that the second peer UE rejects the second transmit power value, wherein the resent second power control request message includes an indication of a third transmit power value. In some examples, power component 1210 may update the second transmit power value with a transmit power adjustment value. In some examples, power component 1210 may determine that the third transmit power value satisfies a threshold associated with the second peer UE, wherein the second power control request message including an indication of the third transmit power value is resent based on the third transmit power value satisfying the threshold associated with the second peer UE.

[0170] In some examples, the power component 1210 can set the transmit power level of the UE based on the transmit power value indicated in the power control request message. In some cases, the first power control request message and the second power control request message include a transmit power parameter for adjusting the transmit power value of the first peer UE and the second peer UE. In some cases, the first power control request message includes a first indication of the first transmit power value, and the second power control request message includes a second indication of the second transmit power value. In some cases, the third power control request message includes a third indication of a third transmit power value different from the first transmit power value. In some cases, the first TRP is different from the second TRP.

[0171] Resource component 1215 may determine time and frequency resources for sidelink communications with a first peer UE and a second peer UE based on a received first power control response message and a received second power control response message. In some cases, the determined time and frequency resources include the same time and frequency resource blocks. Sidelink component 1225 may send sidelink communications to peer UEs based on a transmit power value. In some examples, sidelink component 1225 may send a first SCI to a first peer UE using a first TRP of the UE and send a second SCI to a second peer UE using a second TRP of the UE based on a first power control response message indicating that the first peer UE accepts a first transmit power value and a second power control response message indicating that the second peer UE accepts a second transmit power value. In some examples, sidelink component 1225 may receive an SCI from a peer UE based on a power control response message indicating that the UE accepts a transmit power value.

[0172] Multiplexing component 1220 can determine to spatially multiplex sidelink communications of the first peer UE and the second peer UE based on sidelink information associated with the first peer UE and the second peer UE, the sidelink information including an RSRP indicator or an RSRQ indicator or both. In some examples, the sidelink communications of the first peer UE and the second peer UE are multiplexed on the determined time and frequency resources, wherein the multiplexing includes spatial multiplexing.

[0173] Modulation component 1230 may send a first MCS request message to a second peer UE using the UE's second TRP based on a first power control response message indicating that the first peer UE rejects the first transmit power value and a second power control response message indicating that the second peer UE accepts the second transmit power value, wherein the first MCS request message includes a first MCS restriction. In some examples, modulation component 1230 may receive a first MCS response message from a second peer UE using the UE's second TRP based on the first MCS request message. In some examples, a second MCS request message may be sent to a second peer UE using the UE's second TRP based on a third power control response message indicating that the first peer UE rejects a third transmit power value, wherein the second MCS request message includes a second MCS restriction different from the first MCS restriction. In some examples, modulation component 1230 may receive a second MCS response message from a second peer UE using the UE's second TRP based on the second MCS request message.

[0174] In some examples, the modulation component 1230 may determine the first MCS limit or the second MCS or both based on the sidelink information associated with the first peer UE and the second peer UE. In some examples, the modulation component 1230 may determine the MCS limit of the first peer UE based on receiving a third power control response message indicating that the second peer UE accepts the third transmit power value. In some examples, the MCS request message is sent to the first peer UE using the first TRP of the UE, wherein the MCS request message includes an indication of the MCS limit. In some examples, the modulation component 1230 may receive an MCS response message from the first peer UE using the first TRP of the UE based on the MCS request message, wherein the time and frequency resources for sidelink communication with the first peer UE and the second peer UE are determined based on the first peer UE accepting the MCS limit and the second peer UE accepting the third transmit power value. In some examples, the MCS request message is received based on a power control response message indicating that the UE refuses to transmit the power value, wherein the MCS request message includes the MCS limit. In some examples, the modulation component 1230 may send the MCS response message based on the MCS request message.

[0175] Beam component 1235 may send a first beam modification request message to a first peer UE using a first TRP of the UE, or send a second beam modification request message to a second peer UE using a second TRP of the UE, or both, based on first capability information associated with the first peer UE or second capability information associated with the second peer UE, or both. In some examples, beam component 1235 may receive a first beam modification response message from the first peer UE using the first TRP of the UE, or receive a second beam modification response message from the second peer UE using the second TRP of the UE, or both, based on the first beam modification request message or the second beam modification request message, or both. In some examples, beam component 1235 may send a first power control request message or a second power control request message, or both, based at least in part on the first beam modification response message or the second beam modification response message, or both.

[0176] In some examples, beam component 1235 may receive a beam modification request message based on capability information associated with the UE. In some examples, beam component 1235 may send a beam modification response message based on the beam modification request message. In some examples, beam component 1235 may receive a power control request message based on the beam modification response message. In some cases, the first beam modification request message or the second beam modification request message or both include an indication for the first peer UE or the second peer UE or both to activate a directional beam set for sidelink communication.

[0177] In some cases, the first beam modification request message or the second beam modification request message, or both, includes an indication for the first peer UE or the second peer UE or both to deactivate the set of directional beams for sidelink communications. In some cases, the first beam modification request message or the second beam modification request message, or both, includes an indication of a threshold transmit power value for each directional beam to be used for sidelink communications by the first peer UE or the second peer UE or both. In some cases, the first beam modification response message or the second beam modification response message, or both, includes an indication for the first peer UE or the second peer UE or both to accept or reject the set of directional beams to be used by the first peer UE or the second peer UE or both for sidelink communications.

[0178] In some cases, the beam modification request message includes an indication that the UE is to activate a set of directional beams for sidelink communications. In some cases, the beam modification request message includes an indication that the UE is to deactivate a set of directional beams for sidelink communications. In some cases, the beam modification request message includes an indication of a threshold transmit power value associated with one or more directional beams that the UE is to use for sidelink communications. In some cases, the beam modification response message includes an indication that the UE accepts or rejects one or more directional beams used by the UE for sidelink communications.

[0179] Fig.13 A diagram of a system 1300 including a device 1305 according to various aspects of the present disclosure is shown. The device 1305 may be an example of or a component including the device 1005, device 1105, or UE 115 as described herein. Figures 1 to 9 As described, the device 1305 may be configured with a single TRP or multiple TRPs. The device 1305 may include components for two-way voice and data communications, including components for sending and receiving communications, including a UE communication manager 1310, an I / O controller 1315, a transceiver 1320, an antenna 1325, a memory 1330, and a processor 1340. These components may communicate electronically via one or more buses (e.g., bus 1345).

[0180] The communication manager 1310 described herein may be implemented to achieve one or more potential improvements. One implementation may allow the device 1305 to reduce the latency of sidelink communications in a wireless communication system (such as a 5G system). Another implementation may allow the device 1305 to improve resource utilization for sidelink communications with two or more peer devices by determining the time and frequency resources of two or more peer devices and performing space division multiplexing on the determined time and frequency resources. Another implementation may allow the device 1305 to mitigate interference with sidelink communications with two or more peer devices by sending a power control request message to two or more peer devices and receiving a power control response message from two or more peer devices. The power control request message may indicate a preferred transmit power, a transmit power decrement value, or a transmit power increment value for two or more peer devices to adjust the transmit power level to avoid interference with other peer devices.

[0181] The UE communication manager 1310 may send a first power control request message to a first peer UE using a first TRP among at least two TRPs associated with the UE, and send a second power control request message to a second peer UE using a first TRP or a second TRP among at least two TRPs associated with the UE, in response to the sending, receive a first power control response message from the first peer UE using the first TRP of the UE, and receive a second power control response message from the second peer UE using the first TRP or the second TRP of the UE, and determine time and frequency resources for sidelink communication with the first peer UE and the second peer UE based on the received first power control response message and the received second power control response message.

[0182] The UE communication manager 1310 may also receive a power control request message from a peer UE, the power control request message including an indication of a transmit power value for the UE, the peer UE having multiple TRPs, based on the reception, send a power control response message from the peer UE, and send sidelink communications to the peer UE according to the transmit power value.

[0183] I / O controller 1315 can manage input and output signals for device 1305. I / O controller 1315 can also manage peripheral devices that are not integrated into device 1305. In some cases, I / O controller 1315 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1315 can utilize a computer such as a 1305. In some cases, the I / O controller 1315 may be implemented as part of the processor. In some cases, a user may interact with the device 1305 via the I / O controller 1315 or via hardware components controlled by the I / O controller 1315.

[0184] The transceiver 1320 can communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 1320 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1320 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and demodulate the packets received from the antenna. In some cases, the wireless device can include a single antenna 1325. However, in some cases, the device 1305 can have more than one antenna 1325, which can send or receive multiple wireless transmissions simultaneously.

[0185] Memory 1330 may include random access memory (RAM) and read-only memory (ROM). Memory 1330 may store computer-readable, computer-executable code 1335, including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 1330 may contain, among other things, a basic input / output system (BIOS), which may control basic hardware or software operations such as interaction with peripheral components or devices.

[0186] The code 1335 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1335 may be stored in a non-transitory computer-readable medium such as a system memory or other type of memory. In some cases, the code 1335 may not be directly executable by the processor 1340, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0187] Processor 1340 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1340 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into processor 1340. Processor 1340 may be configured to run computer-readable instructions stored in a memory (e.g., memory 1330) to cause device 1305 to perform various functions (e.g., functions or tasks supporting techniques for determining sidelink resources for user equipment that enables multiple TRPs).

[0188] Fig.14 A flow chart illustrating a method 1400 according to various aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by a UE 115 or a component thereof as described herein. Figures 1 to 9 As described, UE 115 may be configured with a single TRP or multiple TRPs. The operations of method 1400 may be performed as described with reference to Figures 10 to 13 The communication manager described in the embodiment of the present invention performs. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0189] At 1405, the UE may send a first power control request message to a first peer UE using a first TRP of at least two TRPs associated with the UE, and send a second power control request message to a second peer UE using a first TRP or a second TRP of at least two TRPs associated with the UE. The operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed as described in reference to Figures 10 to 13 The power components described are implemented.

[0190] At 1410, the UE may, in response to the sending, receive a first power control response message from a first peer UE using the UE's first TRP, and receive a second power control response message from a second peer UE using the UE's first TRP or a second TRP. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed as described in reference to Figures 10 to 13 The power components described are implemented.

[0191] At 1415, the UE may determine time and frequency resources for sidelink communications with the first peer UE and the second peer UE based on the received first power control response message and the received second power control response message. The operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed as described in reference to Figures 10 to 13 Describes the resource component implementation.

[0192] Fig.15 A flow chart illustrating a method 1500 according to various aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by a UE 115 or a component thereof as described herein. Figures 1 to 9 As described, UE 115 may be configured with a single TRP or multiple TRPs. The operations of method 1500 may be performed as described with reference to Figures 10 to 13 The UE communication manager described herein performs. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0193] At 1505, the UE may determine to spatially multiplex sidelink communications of the first peer UE and the second peer UE based on sidelink information associated with the first peer UE and the second peer UE, the sidelink information including an RSRP indicator or an RSRQ indicator or both. The operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed as described in reference to Figures 10 to 13 Describes the implementation of a reusable component.

[0194] At 1510, the UE may send a first power control request message to a first peer UE using a first TRP of at least two TRPs associated with the UE, and send a second power control request message to a second peer UE using a first TRP or a second TRP of at least two TRPs associated with the UE. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed as described in reference to Figures 10 to 13 The power components described are implemented.

[0195] At 1515, the UE may, in response to the sending, receive a first power control response message from the first peer UE using the UE's first TRP, and receive a second power control response message from the second peer UE using the UE's first TRP or the second TRP. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed as described in reference to Figures 10 to 13 The power components described are implemented.

[0196] At 1520, the UE may determine time and frequency resources for sidelink communications with the first peer UE and the second peer UE based on the received first power control response message and the received second power control response message. The operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed as described in reference to Figures 10 to 13 Describes the resource component implementation.

[0197] Fig.16 A flow chart illustrating a method 1600 according to various aspects of the present disclosure is shown. The operations of the method 1600 may be implemented by a UE 115 or a component thereof as described herein. Figures 1 to 9 As described, UE 115 may be configured with a single TRP or multiple TRPs. The operations of method 1600 may be performed as described in reference Figures 10 to 13 The communication manager described in the embodiment of the present invention performs. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0198] At 1605, the UE may send a first power control request message to a first peer UE using a first TRP of at least two TRPs associated with the UE, and send a second power control request message to a second peer UE using a first TRP or a second TRP of at least two TRPs associated with the UE. 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 in reference to Figures 10 to 13 The power components described are implemented.

[0199] At 1610, the UE may, in response to the sending, receive a first power control response message from a first peer UE using the UE's first TRP, and receive a second power control response message from a second peer UE using the UE's first TRP or a second TRP. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed as described in reference to Figures 10 to 13 The power components described are implemented.

[0200] At 1615, the UE may determine time and frequency resources for sidelink communications with the first peer UE and the second peer UE based on the received first power control response message and the received second power control response message. 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 in reference to Figures 10 to 13 Describes the resource component implementation.

[0201] At 1620, the UE may multiplex sidelink communications of the first peer UE and the second peer UE on the determined time and frequency resources, wherein the multiplexing includes spatial division multiplexing. 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 in reference to Figures 10 to 13 Describes the implementation of a reusable component.

[0202] Fig.17 A flow chart illustrating a method 1700 according to various aspects of the present disclosure is shown. The operations of the method 1700 may be implemented by a UE 115 or a component thereof as described herein. Figures 1 to 9 As described, UE 115 may be configured with a single TRP or multiple TRPs. The operations of method 1700 may be performed as described with reference to Figures 10 to 13 The communication manager described in the embodiment of the present invention performs. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0203] At 1705, the UE may receive a power control request message from a peer UE, the power control request message including an indication of a transmit power value for the UE, the peer UE having multiple TRPs. 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 in reference to Figures 10 to 13 The power components described are implemented.

[0204] At 1710, the UE may send a power control response message from the peer UE based on the reception. 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 in reference to Figures 10 to 13 The power components described are implemented.

[0205] At 1715, the UE may transmit a sidelink communication to a peer UE according to the transmit power value. The operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be performed as described in reference to Figures 10 to 13 The sidelink component described performs the following.

[0206] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects of two or more of the methods may be combined.

[0207] The following provides an overview of various aspects of the disclosure:

[0208] Aspect 1: A method for sidelink communication at a UE, wherein: a first power control request message is sent to a first peer UE using a first TRP among at least two TRPs associated with the UE, and a second power control request message is sent to a second peer UE using a first TRP or a second TRP among at least two TRPs associated with the UE; in response to the sending, a first power control response message is received from the first peer UE using the first TRP of the UE, and a second power control response message is received from the second peer UE using the first TRP or the second TRP of the UE; and time and frequency resources for sidelink communication with the first peer UE and the second peer UE are determined based at least in part on the received first power control response message and the received second power control response message.

[0209] Aspect 2: The method according to aspect 1, wherein the first power control request message and the second power control request message include a transmit power parameter for adjusting transmit power values ​​of the first peer UE and the second peer UE.

[0210] Aspect 3: The method according to any one of Aspects 1 to 2 further includes: determining to perform spatial division multiplexing of sidelink communications of the first peer UE and the second peer UE based at least in part on sidelink information associated with the first peer UE and the second peer UE, the sidelink information including an RSRP indicator or an RSRQ indicator or both.

[0211] Aspect 4: The method according to any one of Aspects 1 to 3 further includes: multiplexing the sidelink communications of the first peer UE and the second peer UE on the determined time and frequency resources, wherein the multiplexing includes space division multiplexing.

[0212] Aspect 5: The method according to any one of Aspects 1 to 4 further includes: determining a first transmit power value of the first peer UE and a second transmit power value of the second peer UE based at least in part on sidelink information associated with the first peer UE and the second peer UE, wherein the first transmit power value is different from the second transmit power value.

[0213] Aspect 6: The method according to aspect 5, wherein the first power control request message includes a first indication of a first transmit power value, and the second power control request message includes a second indication of a second transmit power value.

[0214] Aspect 7: The method according to any one of Aspects 5 to 6 also includes: determining that the first peer UE accepts the first transmit power value and the second peer UE accepts the second transmit power value at least partially based on the first power control response message and the second power control response message, wherein determining the time and frequency resources for sidelink communication with the first peer UE and the second peer UE is at least partially based on the first peer UE accepting the first transmit power value and the second peer UE accepting the second transmit power value.

[0215] Aspect 8: The method according to any one of Aspects 5 to 7 further includes: sending a first SCI to the first peer UE using the first TRP of the UE, and sending a second SCI to the second peer UE using the second TRP of the UE, at least in part based on a first power control response message indicating that the first peer UE accepts the first transmit power value and a second power control response message indicating that the second peer UE accepts the second transmit power value.

[0216] Aspect 9: The method according to any one of Aspects 5 to 8 further includes: sending a first MCS request message to a second peer UE using the UE's second TRP based at least in part on a first power control response message indicating that the first peer UE rejects the first transmit power value and a second power control response message indicating that the second peer UE accepts the second transmit power value, wherein the first MCS request message includes a first MCS restriction; and receiving a first MCS response message from the second peer UE using the UE's second TRP based at least in part on the first MCS request message.

[0217] Aspect 10: The method according to Aspect 9 also includes: sending a third power control request message to the first peer UE using the first TRP of the UE based at least in part on the first MCS response message indicating that the second peer UE accepts the first MCS restriction; and receiving a third power control response message from the first peer UE using the first TRP of the UE based at least in part on the third power control request message.

[0218] Aspect 11: The method according to aspect 10, wherein the third power control request message includes a third indication of a third transmit power value different from the first transmit power value.

[0219] Aspect 12: The method according to any one of Aspects 10 to 11 further includes: sending a second MCS request message to a second peer UE using the UE's second TRP based at least in part on a third power control response message indicating that the first peer UE rejects a third transmit power value, wherein the second MCS request message includes a second MCS restriction different from the first MCS restriction; and receiving a second MCS response message from the second peer UE using the UE's second TRP based at least in part on the second MCS request message.

[0220] Aspect 13: The method according to aspect 12 further includes: determining the first MCS limit or the second MCS or both based at least in part on sidelink information associated with the first peer UE and the second peer UE.

[0221] Aspect 14: The method according to any one of Aspects 5 to 13 further includes: determining that the first peer UE accepts the first transmit power value and the second peer UE rejects the second transmit power value based at least in part on the first power control response message and the second power control response message; determining a third transmit power value different from the second transmit power value based at least in part on the second peer UE rejecting the second transmit power value; and resending a second power control request message to the second peer UE using the UE's second TRP based at least in part on the second power control response message indicating that the second peer UE rejects the second transmit power value, wherein the resent second power control request message includes an indication of the third transmit power value.

[0222] Aspect 15: The method according to aspect 14, wherein determining the third transmit power value comprises: updating the second transmit power value with the transmit power adjustment value.

[0223] Aspect 16: The method according to any one of Aspects 14 to 15 further includes: determining that the third transmit power value satisfies a threshold associated with a second peer UE, wherein a second power control request message including an indication of the third transmit power value is resent at least in part based on the third transmit power value satisfying the threshold associated with the second peer UE.

[0224] Aspect 17: The method according to any one of Aspects 14 to 16 further comprises: determining the MCS limit of the first peer UE based at least in part on receiving a third power control response message indicating that the second peer UE accepts the third transmit power value.

[0225] Aspect 18: According to the method of Aspect 17, it also includes: sending an MCS request message to a first peer UE using the first TRP of the UE, wherein the MCS request message includes an indication of an MCS restriction; and receiving an MCS response message from the first peer UE using the first TRP of the UE based at least in part on the MCS request message, wherein determining the time and frequency resources for sidelink communication with the first peer UE and the second peer UE is based at least in part on the first peer UE accepting the MCS restriction and the second peer UE accepting a third transmit power value.

[0226] Aspect 19: The method according to any one of Aspects 1 to 18 further includes: sending a first beam modification request message to the first peer UE using the first TRP of the UE, or sending a second beam modification request message to the second peer UE using the second TRP of the UE, or both, based at least in part on first capability information associated with the first peer UE or second capability information associated with the second peer UE, or both; and receiving a first beam modification response message from the first peer UE using the first TRP of the UE, or receiving a second beam modification response message from the second peer UE using the second TRP of the UE, or both, based at least in part on the first beam modification request message or the second beam modification request message, or both.

[0227] Aspect 20: The method according to Aspect 19, wherein sending the first power control request message or the second power control request message or both is based at least in part on the first beam modification response message or the second beam modification response message or both.

[0228] Aspect 21: A method according to any one of Aspects 19 to 20, wherein the first beam modification request message or the second beam modification request message or both include an indication for the first peer UE or the second peer UE or both to activate a directional beam set for sidelink communication.

[0229] Aspect 22: A method according to any one of Aspects 19 to 21, wherein the first beam modification request message or the second beam modification request message or both include an indication for the first peer UE or the second peer UE or both to deactivate the directional beam set for sidelink communication.

[0230] Aspect 23: A method according to any one of Aspects 19 to 22, wherein the first beam modification request message or the second beam modification request message or both include an indication of a threshold transmit power value for each directional beam to be used for sidelink communication by the first peer UE or the second peer UE or both.

[0231] Aspect 24: A method according to any one of Aspects 19 to 23, wherein the first beam modification response message or the second beam modification response message or both include an indication for the first peer UE or the second peer UE or both to accept or reject the directional beam set used by the first peer UE or the second peer UE or both for sidelink communication.

[0232] Aspect 25: A method according to any one of Aspects 1 to 24, wherein the first TRP is different from the second TRP.

[0233] Aspect 26: The method according to any one of Aspects 1 to 25, wherein the determined time and frequency resources comprise the same time and frequency resource blocks.

[0234] Aspect 27: A method for sidelink communication at a UE, comprising: receiving a power control request message from a peer UE, the power control request message including an indication of a transmit power value for the UE, the peer UE having multiple TRPs; sending a power control response message from the peer UE based at least in part on the receiving; and sending sidelink communication to the peer UE based on the transmit power value.

[0235] Aspect 28: The method according to Aspect 27 further comprises: setting the transmit power level of the UE based at least in part on the transmit power value indicated in the power control request message.

[0236] Aspect 29: The method according to any one of Aspects 27 to 28, further comprising: receiving an SCI from a peer UE based at least in part on a power control response message indicating that the UE accepts the transmit power value.

[0237] Aspect 30: The method according to any one of Aspects 27 to 29 further includes: receiving an MCS request message based at least in part on a power control response message indicating that the UE refuses to send a power value, wherein the MCS request message includes an MCS restriction; and sending an MCS response message based at least in part on the MCS request message.

[0238] Aspect 31: The method according to any one of Aspects 27 to 30 further includes: receiving a beam modification request message based at least in part on capability information associated with the UE; and sending a beam modification response message based at least in part on the beam modification request message.

[0239] Aspect 32: The method according to Aspect 31, wherein receiving the power control request message is based at least in part on the beam modification response message.

[0240] Aspect 33: The method according to any one of Aspects 31 to 32, wherein the beam modification request message includes an indication that the UE is to activate a directional beam set for sidelink communication.

[0241] Aspect 34: The method according to any one of Aspects 31 to 33, wherein the beam modification request message includes an indication that the UE is to deactivate the directional beam set for sidelink communication.

[0242] Aspect 35: A method according to any one of Aspects 31 to 34, wherein the beam modification request message includes an indication of a threshold transmit power value associated with one or more directional beams to be used by the UE for sidelink communication.

[0243] Aspect 36: A method according to any one of Aspects 31 to 35, wherein the beam modification response message includes an indication of the UE accepting or rejecting one or more directional beams used by the UE for sidelink communication.

[0244] Aspect 37: An apparatus for sidelink communication at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform any one of the methods described in Aspects 1 to 26.

[0245] Aspect 38: An apparatus for sidelink communication at a UE, comprising: at least one component for performing the method of any one of Aspects 1 to 26.

[0246] Aspect 39: A non-transitory computer-readable medium storing a code for sidelink communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 1 to 26.

[0247] Aspect 40: An apparatus for sidelink communication at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform any one of the methods described in Aspects 27 to 36.

[0248] Aspect 41: An apparatus for sidelink communication at a UE, comprising: at least one component for performing the method of any one of Aspects 27 to 36.

[0249] Aspect 42: A non-transitory computer-readable medium storing a code for sidelink communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 27 to 36.

[0250] 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 many descriptions, the techniques described herein are also applicable outside of LTE, LTE-A, LTE-A Pro, or NR systems. For example, the described techniques may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0251] The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0252] 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, a CPU, 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 alternatively, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration).

[0253] The functions described herein may be implemented in hardware, software run by a processor, firmware, or any combination thereof. If implemented in software run by a processor, the functions may be stored on or sent via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software run by a processor, hardware, firmware, hard wiring, or any combination thereof. Features that implement the functions may also be physically located at various locations, including portions that are distributed so as to implement the functions at different physical locations.

[0254] Computer-readable media include both non-transitory computer storage media and communication media, and communication media include any media that helps to transfer a computer program from one place to another place.Non-transitory storage media can be any available media that can be accessed by a general or special computer.As an example and not limitation, non-transitory computer-readable media 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 devices, or can be used to carry or store required program code in the form of instructions or data structures and can be accessed by a general or special computer or a general or special processor. Any other non-transitory medium. In addition, any connection is appropriately referred to as computer-readable media. For example, if software is sent from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwaves, coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwaves are included in the definition of computer-readable media. Disk and disc as used herein include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0255] As used herein, including in the claims, "or" used in a list of items (e.g., a list of items beginning 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 refers to A or B or C or AB or AC or BC or ABC (i.e., A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of this 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."

[0256] In the 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 the similar components. If only the first reference number is used in the specification, the description applies to any one of the similar components having the same first reference number, regardless of the second reference number or other subsequent reference numbers.

[0257] 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 within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "superior to other examples." In order to provide an understanding of the described techniques, the detailed description includes specific details. However, these techniques may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0258] The description herein is provided to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for sidelink communication at a user equipment UE, comprising: sending a first power control request message to a first peer UE using a first transmission and reception point of at least two transmission and reception points associated with the UE, and sending a second power control request message to a second peer UE using the first transmission and reception point or a second transmission and reception point of the at least two transmission and reception points associated with the UE; In response to the transmitting, receiving a first power control response message from the first peer UE using the first transmit and receive point associated with the UE, and receiving a second power control response message from the second peer UE using the first transmit and receive point or the second transmit and receive point associated with the UE; as well as Time and frequency resources for sidelink communications with the first peer to peer UE and the second peer to peer UE are determined based at least in part on the received first power control response message and the received second power control response message.

2. The method according to claim 1, wherein: The first power control request message and the second power control request message include transmit power parameters for adjusting transmit power values ​​of the first peer UE and the second peer UE.

3. The method according to claim 1, further comprising: Determine to spatially multiplex the sidelink communications of the first peer UE and the second peer UE based at least in part on sidelink information associated with the first peer UE and the second peer UE, the sidelink information comprising a reference signal received power indicator or a reference signal received quality indicator or both.

4. The method according to claim 1, further comprising: The sidelink communications of the first peer to peer UE and the second peer to peer UE are multiplexed on the determined time and frequency resources, wherein the multiplexing comprises space division multiplexing.

5. The method according to claim 1, further comprising: A first transmit power value for the first peer UE and a second transmit power value for the second peer UE are determined based at least in part on sidelink information associated with the first peer UE and the second peer UE, wherein the first transmit power value is different from the second transmit power value.

6. The method according to claim 5, wherein: The first power control request message includes a first indication of the first transmit power value, and the second power control request message includes a second indication of the second transmit power value.

7. The method according to claim 5, further comprising: determining, based at least in part on the first power control response message and the second power control response message, that the first peer to peer UE accepts the first transmit power value and the second peer to peer UE accepts the second transmit power value, Wherein determining the time and frequency resources for the sidelink communications with the first peer UE and the second peer UE is based at least in part on the first peer UE accepting the first transmit power value and the second peer UE accepting the second transmit power value.

8. The method according to claim 5, further comprising: At least partially based on the first power control response message indicating that the first peer UE accepts the first transmit power value and the second power control response message indicating that the second peer UE accepts the second transmit power value, first sidelink control information is sent to the first peer UE using the first transmit and receive point associated with the UE, and second sidelink control information is sent to the second peer UE using the second transmit and receive point associated with the UE.

9. The method according to claim 5, further comprising: sending a first modulation and coding scheme request message to the second peer UE using the second transmission and reception point associated with the UE, wherein the first modulation and coding scheme request message includes a first modulation and coding scheme restriction based at least in part on the first power control response message indicating that the first peer UE rejects the first transmit power value and the second power control response message indicating that the second peer UE accepts the second transmit power value; and Based at least in part on the first modulation and coding scheme request message, receiving a first modulation and coding scheme response message from the second peer UE using the second transmission and reception point associated with the UE.

10. The method according to claim 9, further comprising: transmitting, based at least in part on the first modulation and coding scheme response message indicating that the second peer UE accepts the first modulation and coding scheme restriction, a third power control request message to the first peer UE using the first transmission and reception point associated with the UE; and Based at least in part on the third power control request message, receiving a third power control response message from the first peer UE using the first transmit and receive point associated with the UE.

11. The method according to claim 10, wherein: The third power control request message includes a third indication of a third transmit power value different from the first transmit power value.

12. The method according to claim 11, further comprising: sending, based at least in part on the third power control response message indicating that the first peer UE rejects the third transmit power value, a second modulation and coding scheme request message to the second peer UE using the second transmit and receive point associated with the UE, wherein the second modulation and coding scheme request message includes a second modulation and coding scheme restriction that is different from the first modulation and coding scheme restriction; and Based at least in part on the second modulation and coding scheme request message, receiving a second modulation and coding scheme response message from the second peer UE using the second transmission and reception point associated with the UE.

13. The method according to claim 12, further comprising: The first modulation and coding scheme restriction or the second modulation and coding scheme restriction or both are determined based at least in part on the sidelink information associated with the first peer to peer UE and the second peer to peer UE.

14. The method according to claim 5, further comprising: determining, based at least in part on the first power control response message and the second power control response message, that the first peer to peer UE accepts the first transmit power value and the second peer to peer UE rejects the second transmit power value; determining a third transmit power value different from the second transmit power value based at least in part on the second peer UE rejecting the second transmit power value; and At least partially based on the second power control response message indicating that the second peer UE rejects the second transmit power value, resend the second power control request message to the second peer UE using the second transmit and receive point associated with the UE, wherein the resent second power control request message includes an indication of the third transmit power value.

15. The method according to claim 14, wherein: Determining the third transmit power value includes: The second transmit power value is updated with a transmit power adjustment value.

16. The method according to claim 14, further comprising: determining that the third transmit power value satisfies a threshold associated with the second peer UE, wherein the second power control request message including the indication of the third transmit power value is resent based at least in part on the third transmit power value satisfying the threshold associated with the second peer UE.

17. The method according to claim 14, further comprising: A modulation and coding scheme restriction of the first peer to peer UE is determined based at least in part on receiving a third power control response message indicating that the second peer to peer UE accepts the third transmit power value.

18. The method according to claim 17, further comprising: sending a modulation and coding scheme request message to the first peer UE using the first transmission and reception point associated with the UE, wherein the modulation and coding scheme request message includes an indication of the modulation and coding scheme restriction; and receiving a modulation and coding scheme response message from the first peer UE using the first transmission and reception point associated with the UE based at least in part on the modulation and coding scheme request message, Wherein determining the time and frequency resources for the sidelink communications with the first peer UE and the second peer UE is based at least in part on the first peer UE accepting the modulation and coding scheme restriction and the second peer UE accepting the third transmit power value.

19. The method of claim 1, further comprising: sending a first beam modification request message to the first peer UE using the first transmission and reception point associated with the UE, or sending a second beam modification request message to the second peer UE using the second transmission and reception point associated with the UE, or both, based at least in part on first capability information associated with the first peer UE or second capability information associated with the second peer UE, or both; and At least partially based on the first beam modification request message or the second beam modification request message, or both, receiving a first beam modification response message from the first peer UE using the first transmit and receive point associated with the UE, or receiving a second beam modification response message from the second peer UE using the second transmit and receive point associated with the UE, or both.

20. The method according to claim 19, wherein: Sending the first power control request message or the second power control request message, or both, is based at least in part on the first beam modification response message or the second beam modification response message, or both.

21. The method according to claim 19, wherein: The first beam modification request message or the second beam modification request message, or both, comprises an indication for the first peer UE or the second peer UE, or both, to activate a set of directional beams for the sidelink communication.

22. The method according to claim 19, wherein: The first beam modification request message or the second beam modification request message or both include an indication for the first peer UE or the second peer UE or both to deactivate a directional beam set for the sidelink communication.

23. The method according to claim 19, wherein: The first beam modification request message or the second beam modification request message or both comprise an indication of a threshold transmit power value for each directional beam to be used by the first peer to peer UE or the second peer to peer UE or both for the sidelink communication.

24. The method according to claim 19, wherein: The first beam modification response message or the second beam modification response message or both include an indication that the first peer UE or the second peer UE or both accept or reject the directional beam set used by the first peer UE or the second peer UE or both for the sidelink communication.

25. The method of claim 1, wherein: The first sending and receiving point is different from the second sending and receiving point.

26. The method of claim 1, wherein: The determined time and frequency resources include the same time and frequency resource blocks.

27. An apparatus for sidelink communication, comprising: means for sending a first power control request message to a first peer device using a first transmission and reception point of at least two transmission and reception points associated with the device and sending a second power control request message to a second peer device using the first transmission and reception point or a second transmission and reception point of the at least two transmission and reception points associated with the device; means for receiving, in response to said transmitting, a first power control response message from said first peer device using said first transmit and receive point associated with said device and receiving a second power control response message from said second peer device using said first transmit and receive point or said second transmit and receive point associated with said device; as well as Means for determining time and frequency resources for sidelink communications with the first peer device and the second peer device based at least in part on the received first power control response message and the received second power control response message.

28. The device according to claim 27, wherein The first power control request message and the second power control request message include transmit power parameters for adjusting transmit power values ​​of the first peer device and the second peer device.

29. An apparatus for sidelink communication, comprising: processor, a memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor to cause the apparatus to: sending a first power control request message to a first peer device using a first transmission and reception point of at least two transmission and reception points associated with the device, and sending a second power control request message to a second peer device using the first transmission and reception point or a second transmission and reception point of the at least two transmission and reception points associated with the device; in response to the transmitting, receiving a first power control response message from the first peer device using the first transmit and receive point associated with the device, and receiving a second power control response message from the second peer device using the first transmit and receive point or the second transmit and receive point associated with the device; as well as Time and frequency resources for sidelink communications with the first peer device and the second peer device are determined based at least in part on the received first power control response message and the received second power control response message.

30. A non-transitory computer-readable medium storing code for sidelink communication at a user equipment (UE), the code comprising instructions executable by a processor to: sending a first power control request message to a first peer UE using a first transmission and reception point of at least two transmission and reception points associated with the UE, and sending a second power control request message to a second peer UE using the first transmission and reception point or a second transmission and reception point of the at least two transmission and reception points associated with the UE; In response to the transmitting, receiving a first power control response message from the first peer UE using the first transmit and receive point associated with the UE, and receiving a second power control response message from the second peer UE using the first transmit and receive point or the second transmit and receive point associated with the UE; as well as Time and frequency resources for sidelink communications with the first peer to peer UE and the second peer to peer UE are determined based at least in part on the received first power control response message and the received second power control response message.

31. A computer program product comprising computer instructions which, when executed by a processor, cause the processor to perform a method for sidelink communication at a user equipment (UE), the method comprising: sending a first power control request message to a first peer UE using a first transmission and reception point of at least two transmission and reception points associated with the UE, and sending a second power control request message to a second peer UE using the first transmission and reception point or a second transmission and reception point of the at least two transmission and reception points associated with the UE; In response to the transmitting, receiving a first power control response message from the first peer UE using the first transmit and receive point associated with the UE, and receiving a second power control response message from the second peer UE using the first transmit and receive point or the second transmit and receive point associated with the UE; as well as Time and frequency resources for sidelink communications with the first peer to peer UE and the second peer to peer UE are determined based at least in part on the received first power control response message and the received second power control response message.

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