WO2025059788A1

WO2025059788A1 - Sounding reference signal configuration for vehicle user equipment

Info

Publication number: WO2025059788A1
Application number: PCT/CN2023/119311
Authority: WO
Inventors: Hui Guo; Shuanshuan Wu; Tien Viet NGUYEN
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2023-09-18
Filing date: 2023-09-18
Publication date: 2025-03-27
Anticipated expiration: 2026-03-18

Abstract

Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to configuration of sounding reference signal (SRS) transmission for user equipments (UEs) participating in UE aggregation, such as a vehicle UE (V-UE) and a first UE (e.g., a handheld UE). In some aspects, the first UE and the V-UE may coordinate with one another regarding transmission of an SRS, which enables the two UEs to share information regarding transmission of the SRS or subsequent data communication. Some techniques described herein provide signaling to support SRS configuration in scenarios where the UE aggregation is transparent to the network. In some aspects, the network node may configure different SRS configurations for the V-UE and the first UE (e.g., if the UE aggregation is not transparent to the network).

Description

SOUNDING REFERENCE SIGNAL CONFIGURATION FOR VEHICLE USER EQUIPMENT

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and specifically, to techniques and apparatuses for sounding reference signal configuration for a vehicle user equipment.

BACKGROUND

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (for example, bandwidth or transmit power) . Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) . LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipments (UEs) to communicate on a municipal, national, regional, or global level. New Radio (NR) , which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.

SUMMARY

Some aspects described herein relate to a method of wireless communication performed at a first user equipment (UE) . The method may include transmitting information regarding a sounding reference signal (SRS) configuration for the first UE and a vehicle UE associated with the first UE. The method may include receiving the SRS configuration. The method may include coordinating with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration. The method may include transmitting the SRS in accordance with the SRS configuration.

Some aspects described herein relate to a method of wireless communication performed at a network node. The method may include transmitting a first SRS configuration to a first UE. The method may include transmitting a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE. The method may include triggering at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration.

Some aspects described herein relate to a first UE for wireless communication. The first UE may include one or more memories storing processor readable code and one or more processors coupled with the one or more memories. The one or more processors may be individually or collectively operable to cause the first UE to transmit information regarding an SRS configuration for the first UE and a vehicle UE associated with the first UE. The one or more processors may be individually or collectively operable to cause the first UE to receive the SRS configuration. The one or more processors may be individually or collectively operable to cause the first UE to coordinate with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration. The one or more processors may be individually or collectively operable to cause the first UE to transmit the SRS in accordance with the SRS configuration.

Some aspects described herein relate to a network node for wireless communication. The network node may include one or more memories storing processor readable code and one or more processors coupled with the one or more memories. The one or more processors may be individually or collectively operable to cause the network node to transmit a first SRS configuration to a first UE. The one or more processors may be individually or collectively operable to cause the network node to transmit a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE. The one or more processors may be individually or collectively operable to cause the network node to trigger at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a first UE. The set of instructions, when executed by one or more processors of the first UE, may cause the first UE to transmit information regarding an SRS configuration for the first UE and a vehicle UE associated with the first UE. The set of instructions, when executed by one or more processors of the first UE, may cause the first UE to receive the SRS configuration. The set of instructions, when executed by one or more processors of the first UE, may cause the first UE to coordinate with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration. The set of instructions, when executed by one or more processors of the first UE, may cause the first UE to transmit the SRS in accordance with the SRS configuration.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a network node. The set of instructions, when executed by one or more processors of the network node, may cause the network node to transmit a first SRS configuration to a first UE. The set of instructions, when executed by one or more processors of the network node, may cause the network node to transmit a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE. The set of instructions, when executed by one or more processors of the network node, may cause the network node to trigger at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting information regarding an SRS configuration for the apparatus and a vehicle UE associated with the apparatus . The apparatus may include means for receiving the SRS configuration. The apparatus may include means for coordinating with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration. The apparatus may include means for transmitting the SRS in accordance with the SRS configuration.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting a first SRS configuration to a first UE. The apparatus may include means for transmitting a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE. The apparatus may include means for triggering at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, network entity, wireless communication device, or processing system as substantially described with reference to and as illustrated by the drawings and specification.

The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only some typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.

Figure 1 is a diagram illustrating an example of a wireless network.

Figure 2 is a diagram illustrating an example network node in communication with a user equipment (UE) in a wireless network.

Figure 3 is a diagram illustrating an example of UE coordination for a vehicle UE.

Figure 4 is a diagram illustrating examples of uplink UE aggregation.

Figures 5 and 6 are diagrams illustrating examples of signaling relating to sounding reference signal (SRS) configuration and transmission for single-frequency network UE aggregation.

Figures 7 and 8 are diagrams illustrating examples of signaling relating to SRS configuration and transmission for transmission switching UE aggregation.

Figure 9 is a flowchart illustrating an example process performed, for example, by a UE that supports SRS transmission for UE aggregation in accordance with the present disclosure.

Figure 10 is a flowchart illustrating an example process performed, for example, by a network node that supports SRS transmission for UE aggregation in accordance with the present disclosure.

Figure 11 is a diagram of an example apparatus for wireless communication that supports SRS transmission for UE aggregation in accordance with the present disclosure.

Figure 12 is a diagram of an example apparatus for wireless communication that supports SRS transmission for UE aggregation in accordance with the present disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and are not to be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art may appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any quantity of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. Any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or a combination of hardware and software. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

In some deployments, user equipments (UEs) may coordinate with one another for various purposes, referred to as “UE aggregation. ” For example, UEs may coordinate with one another in an automotive context, in which a vehicle UE (V-UE) is mounted to or otherwise associated with a vehicle to support radio access and/or sidelink communication relating to operation of the vehicle. The vehicle UE may support communications of a handheld UE ( “first UE” ) . For example, the V-UE may have an antenna externally mounted to the vehicle, which may provide lower path loss, higher channel quality, and/or a higher power limit than the first UE, which may be inside the vehicle. Additionally, or alternatively, the first UE may support communications of the V-UE. For example, the first UE may be less susceptible to thermal issues than the V-UE, such that the first UE can assist in transmitting or receiving communications during times of high operating temperature.

Various operations of a radio access network (RAN) may rely on or be benefitted by reference signal transmission by a UE. For example, a UE may transmit a sounding reference signal (SRS) according to an SRS configuration and/or an SRS capability of the UE. The SRS can be used for various purposes including channel estimation, rank determination, selection of modulation and coding parameters, and so on. SRS configuration is generally per-UE, in that a UE may be configured with various parameters (e.g., an SRS resource or resource set, a cyclic shift, a number of SRS ports, etc. ) and may transmit an SRS according to the various parameters. However, in the context of UE aggregation, in some examples, the first UE and the V-UE may be treated as a single UE at the network (e.g., the UE aggregation may be transparent to the network) , whereas in other examples the first UE and the V-UE may be treated as separate UEs at the network. This may lead to ambiguity in how to configure and measure SRSs, leading to underutilization of the channel or improper configuration of uplink communications. Furthermore, the V-UE and the first UE may operate in different conditions (for example, due to an antenna of the V-UE being located outside a vehicle and the first UE being located inside the vehicle) , so if a single SRS configuration is used for SRS transmission at both UEs without taking into account these different conditions, communication performance may be degraded.

Various aspects relate generally to SRS transmission for UE aggregation. Some aspects more specifically relate to configuration of SRS transmission for a V-UE and a first UE.

In some aspects, in a situation in which the network node is unaware of the UE aggregation, the first UE and the V-UE may coordinate by exchanging SRS scheduling information, such that the first UE and the V-UE can transmit an SRS on a same resource. Additionally, or alternatively, the first UE may report an SRS configuration that facilitates SRS configuration for both the first UE and the V-UE (such as indicating a number of SRS ports that enables differentiation between the first UE and the V-UE) .

In some aspects, when the V-UE and the first UE are configured to transmit the same uplink data in the same frequency and time resource, the network node may configure different SRS configurations for the V-UE and the first UE (e.g., if the UE aggregation is not transparent to the network) . For example, the network node may configure the different SRS configurations with a same time and frequency resource and with different cyclic shifts.

In some aspects, when the V-UE and the first UE are configured to transmit uplink data in different resources (such as for transmission switching) , the V-UE and the first UE may exchange information, and may select a UE to transmit an SRS and/or a subsequent data communication in association with the exchanging information.

In some aspects, when the V-UE and the first UE are configured to transmit uplink data in different resources (such as for transmission switching) , the network node may configure different SRS configurations for the V-UE and the first UE (e.g., if the UE aggregation is not transparent to the network) . For example, the V-UE’s SRS configuration may have a first bandwidth and the first UE’s SRS configuration may have a second bandwidth (which may or may not be overlapped) . In this example, the network node, or the first UE or the V-UE, may configure the first UE and the V-UE to transmit portions of a transport block using SRS measurements associated with the SRS configurations. Additionally, or alternatively, the network node, the first UE, or the V-UE may configure the first UE and the V-UE to transmit respective communications in different resources (corresponding to the SRS configurations) and/or using different transmission parameters (such as different modulation and coding schemes) using the SRS measurements.

Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages.

In some aspects, by exchanging SRS scheduling information, such that the first UE and the V-UE can transmit an SRS on a same resource, the first UE and the V-UE enable aggregated transmission on the same SRS resource, thereby improving transmission performance and improving compatibility with network nodes that do not support UE aggregation. By reporting an SRS configuration that facilitates SRS configuration for both the first UE and the V-UE, the first UE facilitates SRS configuration that is compatible with UE aggregation by a network node that does not support UE aggregation.

In some aspects, by configuring the different SRS configurations with a same time and frequency resource and with different cyclic shifts, the network node may differentiate which UE (of the V-UE and the first UE) transmitted an SRS in a given resource (e.g., a same time and frequency resource) , thereby enabling configuration of the V-UE and the first UE to use different transmission parameters for respective transmission of the V-UE and the first UE. Using different transmission parameters may provide power savings and improved communication performance by more precisely utilizing capabilities and available resources of the first UE and the V-UE.

In some aspects, by selecting a UE, of the V-UE and the first UE, to transmit an SRS and subsequent data communication, the V-UE and the first UE improve uplink or sidelink transmission performance via UE aggregation in a fashion that is compatible with network nodes that may not support or configure UE aggregation.

In some aspects, by configuring a first bandwidth and a second bandwidth for the V-UE and the first UE, respectively, the network node enables sounding of different bandwidths by the two UEs, thereby increasing the amount of channel information available to the network node, which improves selection of transmission parameters for the two UEs. By configuring the two UEs to transmit portions of a transport block or configuring different transmission parameters using SRS measurements associated with the SRS configurations, communication performance and efficiency of transmission of the transport block may be improved relative to only one of the two UEs transmitting the transport block or transmitting the transport block in an SFN manner.

Figure 1 is a diagram illustrating an example of a wireless network. The wireless network 100 may be or may include elements of a 5G (for example, NR) network or a 4G (for example, Long Term Evolution (LTE) ) network, among other examples. The wireless network 100 may include one or more network nodes 110 (shown as a network node (NN) 110a, a network node 110b, a network node 110c, and a network node 110d) , a user equipment (UE) 120 or multiple UEs 120 (shown as a UE 120a, a UE 120b, a UE 120c, a UE 120d, and a UE 120e) , or other network entities. A network node 110 is an entity that communicates with UEs 120. As shown, a network node 110 may include one or more network nodes. For example, a network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (for example, within a single device or unit) . As another example, a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , meaning that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more central units (CUs) , one or more distributed units (DUs) , or one or more radio units (RUs) ) .

In some examples, a network node 110 is or includes a network node that communicates with UEs 120 via a radio access link, such as an RU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or a core network via a backhaul link, such as a CU. In some examples, a network node 110 (such as an aggregated network node 110 or a disaggregated network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, or one or more DUs. A network node 110 may include, for example, an NR network node, an LTE network node, a Node B, an eNB (for example, in 4G) , a gNB (for example, in 5G) , an access point, or a transmission reception point (TRP) , a DU, an RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, and/or a RAN node. In some examples, the network nodes 110 may be interconnected to one another or to one or more other network nodes 110 in the wireless network 100 through various types of fronthaul, midhaul, or backhaul interfaces, such as a direct physical connection, an air interface, or a virtual network, using any suitable transport network.

Each network node 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP) , the term “cell” can refer to a coverage area of a network node 110 or a network node subsystem serving this coverage area, depending on the context in which the term is used.

A network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs 120 with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscription. A femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs 120 having association with the femto cell (for example, UEs 120 in a closed subscriber group (CSG) ) . A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. A network node 110 for a femto cell may be referred to as a femto network node or an in-home network node.

In some aspects, the terms “base station” or “network node” may refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, “base station” or “network node” may refer to a CU, a DU, an RU, a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) , and/or a Non-Real Time (Non-RT) RIC. In some aspects, the terms “base station” or “network node” may refer to one device configured to perform one or more functions, such as those described herein in connection with the network node 110. In some aspects, the terms “base station” or “network node” may refer to a plurality of devices configured to perform the one or more functions. For example, in some distributed systems, each of a quantity of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to duplicate performance of at least a portion of the function, and the terms “base station” or “network node” may refer to any one or more of those different devices. In some aspects, the terms “base station” or “network node” may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the terms “base station” or “network node” may refer to one of the base station functions and not another. In this way, a single device may include more than one base station.

A network controller 130 may couple to or communicate with a set of network nodes 110 and may provide coordination and control for these network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul communication link. The network nodes 110 may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link. In some aspects, the network controller 130 may be a CU or a core network device, or the network controller 130 may include a CU or a core network device.

The wireless network 100 may include one or more relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (for example, a network node 110 or a UE 120) and send a transmission of the data to a downstream station (for example, a UE 120 or a network node 110) . A relay station may be a UE 120 that can relay transmissions for other UEs 120. In the example shown in Figure 1, the network node 110d (for example, a relay network node) may communicate with the network node 110a (for example, a macro network node) and the UE 120d in order to facilitate communication between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay network node, or a relay.

The UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile. A UE 120 may include, for example, an access terminal, a terminal, a mobile station, or a subscriber unit. A UE 120 may be a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (for example, a smart watch, smart clothing, smart glasses (for example, an augmented reality (AR) , virtual reality (VR) , mixed reality, or extended reality (XR) headset) , a smart wristband, smart jewelry (for example, a smart ring or a smart bracelet) ) , an entertainment device (for example, a music device, a video device, or a satellite radio) , a vehicular component or sensor, a smart meter/sensor, industrial manufacturing equipment, a global positioning system device, a UE function of a network node, or any other suitable device that is configured to communicate via a wireless medium. Some UEs 120 (for example, UEs 102a and 120e) may communicate directly using one or more sidelink channels (for example, without a network node as an intermediary to communicate with one another) . For example, a first UE and a vehicle UE, described in more detail below, may communicate with one another using a sidelink channel to support SRS transmission for UE aggregation.

Some UEs 120 may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. An MTC UE or an eMTC UE may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, or a location tag, that may communicate with a network node, another device (for example, a remote device) , or some other entity. Some UEs 120 may be considered Internet-of-Things (IoT) devices, or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered a Customer Premises Equipment. A UE 120 may be included inside a housing that houses components of the UE 120, such as processor components or memory components. In some examples, the processor components and the memory components may be coupled together. For example, the processor components (for example, one or more processors) and the memory components (for example, a memory) may be operatively coupled, communicatively coupled, electronically coupled, or electrically coupled.

Some UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (for example, which may include a vehicle-to-vehicle (V2V) protocol using for example a PC5 interface for direct communication, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol) , or a mesh network. In such examples, a UE 120 may perform scheduling operations, resource selection operations, or other operations described elsewhere herein as being performed by the network node 110.

In some aspects, a first UE (e.g., the UE 120) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may transmit information regarding an SRS configuration for the first UE and a vehicle UE associated with the first UE; receive the SRS configuration; coordinate with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration; and transmit the SRS in accordance with the SRS configuration. Additionally, or alternatively, the communication manager 140 may perform one or more other operations described herein.

In some aspects, the network node 110 may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may transmit a first SRS configuration to a first UE; transmit a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE; and trigger at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.

Figure 2 is a diagram illustrating an example network node in communication with a UE in a wireless network. The network node may correspond to the network node 110 of Figure 1. Similarly, the UE may correspond to the UE 120 of Figure 1. The network node 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T ≥ 1) . The UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R ≥ 1) . The network node 110 of depicted in Figure 2 includes one or more radio frequency components, such as antennas 234 and a modem 232. In some examples, a network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs, or one or more DUs.

At the network node 110, a transmit processor 220 may receive data, from a data source 212, intended for the UE 120 (or a set of UEs 120) . The transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 using one or more channel quality indicators (CQIs) received from that UE 120. The network node 110 may process (for example, encode and modulate) the data for the UE 120 using on the MCS (s) selected for the UE 120 and may provide data symbols for the UE 120. The transmit processor 220 may process system information (for example, for semi-static resource partitioning information (SRPI) ) and control information (for example, CQI requests, grants, or upper layer signaling) and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (for example, a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS) ) and synchronization signals (for example, a primary synchronization signal (PSS) or a secondary synchronization signal (SSS) ) . A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, the overhead symbols, or the reference symbols, if applicable, and may provide a set of output symbol streams (for example, T output symbol streams) to a corresponding set of modems 232 (for example, T modems) , shown as modems 232a through 232t. For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232. Each modem 232 may use a respective modulator component to process a respective output symbol stream (for example, for OFDM) to obtain an output sample stream. Each modem 232 may further use a respective modulator component to process (for example, convert to analog, amplify, filter, or upconvert) the output sample stream to obtain a downlink signal. The modems 232a through 232t may transmit a set of downlink signals (for example, T downlink signals) via a corresponding set of antennas 234 (for example, T antennas) , shown as antennas 234a through 234t.

At the UE 120, a set of antennas 252 (shown as antennas 252a through 252r) may receive the downlink signals from the network node 110 or other network nodes 110 and may provide a set of received signals (for example, R received signals) to a set of modems 254 (for example, R modems) , shown as modems 254a through 254r. For example, each received signal may be provided to a demodulator component (shown as DEMOD) of a modem 254. Each modem 254 may use a respective demodulator component to condition (for example, filter, amplify, downconvert, or digitize) a received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (for example, for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. A receive processor 258 may process (for example, demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to a data sink 260, and may provide decoded control information and system information to a controller/processor 280. The term “controller/processor” may refer to one or more controllers and/or one or more processors. A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, or a CQI parameter, among other examples. In some examples, one or more components of the UE 120 may be included in a housing 284.

The network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

One or more antennas (for example, antennas 234a through 234t or antennas 252a through 252r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, or an antenna array may include one or more antenna elements (within a single housing or multiple housings) , a set of coplanar antenna elements, a set of non-coplanar antenna elements, or one or more antenna elements coupled to one or more transmission or reception components, such as one or more components of Figure 2.

On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (for example, for reports that include RSRP, RSSI, RSRQ, or CQI) from the controller/processor 280. The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modems 254 (for example, for DFT-s-OFDM or CP-OFDM) , and transmitted to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of the antenna (s) 252, the modem (s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, or the TX MIMO processor 266. The transceiver may be used by one or more processors (for example, the controller/processor 280) and the memory 282 (one or more memories) to perform aspects of any of the methods described herein.

At the network node 110, the uplink signals from UE 120 or other UEs may be received by the antennas 234, processed by the modem 232 (for example, a demodulator component, shown as DEMOD, of the modem 232) , detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and provide the decoded control information to the controller/processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink or uplink communications. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of the antenna (s) 234, the modem (s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, or the TX MIMO processor 230. The transceiver may be used by a processor (for example, the controller/processor 240) and the memory 242 to perform aspects of any of the methods described herein.

The controller/processor 240 of the network node 110, the controller/processor 280 of the UE 120, or any other component (s) of Figure 2 may perform one or more techniques associated with SRS transmission for UE aggregation, as described in more detail elsewhere herein. For example, the controller/processor 240 of the network node 110, the controller/processor 280 of the UE 120, or any other component (s) of Figure 2 may perform or direct operations of, for example, process 900 of Figure 9, process 1000 of Figure 10, or other processes as described herein. The memory 242 and the memory 282 may store data and program codes for the network node 110 and the UE 120, respectively. In some examples, the memory 242 or the memory 282 may each include one or more memories. In some aspects, the memory 242 or the memory 282 may include a non-transitory computer-readable medium storing one or more instructions (for example, code or program code) for wireless communication. For example, the one or more instructions, when executed (for example, directly, or after compiling, converting, or interpreting) by one or more processors of the network node 110 or the UE 120, may cause the one or more processors, the UE 120, or the network node 110 to perform or direct operations of, for example, process 900 of Figure 9, process 1000 of Figure 10, or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, or interpreting the instructions, among other examples.

In some implementations, one or more of the multiple memories may be configured to store processor-executable code that, when executed, may configure the one or more processors to perform various functions described herein (as part of a processing system) . In some other implementations, the processing system may be pre-configured to perform various functions described herein.

In some aspects, a first UE (e.g., the UE 120) includes means for transmitting information regarding an SRS configuration for the first UE and a vehicle UE associated with the first UE; means for receiving the SRS configuration; means for coordinating with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration; and/or means for transmitting the SRS in accordance with the SRS configuration. The means for the first UE to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller/processor 280, or memory 282.

In some aspects, a network node (e.g., the network node 110) includes means for transmitting a first SRS configuration to a first UE; means for transmitting a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE; and/or means for triggering at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration. The means for the network node to perform operations described herein may include, for example, one or more of communication manager 150, transmit processor 220, TX MIMO processor 230, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller/processor 240, memory 242, or scheduler 246.

Figure 3 is a diagram illustrating an example 300 of UE coordination for a vehicle UE (V-UE) . Example 300 includes a network node 110, a V-UE 305 (e.g., UE 120) , and a first UE 310 (e.g., UE 120) . The V-UE 305 may be associated with a vehicle 315. For example, the V-UE 305 may be mounted to or otherwise integrated with the vehicle 315. The V-UE 305 may comprise, for example, an onboard unit (OBU) , one or more antennas, one or more sensors, or the like. The first UE 310 may be referred to as a handheld UE, since the first UE 310 may be associated with a user (e.g., a driver or a passenger of the vehicle 315) . However, it should be noted that the techniques described herein are not limited to first UEs 310 that are handheld.

As shown, the V-UE 305 may have an interface 320 with the network node 110. The interface 320 may include, for example, a radio access (e.g., Uu) interface, and may support uplink and/or downlink communication with the network node 110. As further shown, the first UE 310 may have an interface 325 with the V-UE 305. The interface 325 may include, for example, a device-to-device interface such as a sidelink interface (e.g., PC5) , a RAT interface (e.g., WiFi) , a proprietary interface, or the like. In some aspects, the first UE 310 may also have an interface 330 with the network node 110. The interface 330 may include, for example, a radio access (e.g., Uu) interface, and may support uplink and/or downlink communication with the network node 110. In some other aspects, the first UE 310 may not have a direct interface with the network node 110, as described in more detail in connection with Figure 4. For example, example 300 may include only the interface 320 and the interface 330, and not the interface 325. In some aspects, the V-UE 305 may utilize one or more device-to-device or other interfaces to communicate with other UEs, such as other V-UEs, a roadside unit, or the like.

In some aspects, the V-UE 305 may coordinate with the first UE 310, such as to improve communication performance with the network node 110. In some examples, the V-UE 305 may assist the first UE 310. For example, an antenna of the V-UE 305 may be located on a rooftop of the vehicle 315, leading to better path loss, channel quality, and power limit metrics at the V-UE 305 than at the first UE 310. In this example, the V-UE 305 may be used to achieve improved uplink or downlink communication performance via single-frequency-network transmission, relaying, or transmission switching, described in connection with Figure 4.

Additionally, or alternatively, the first UE 310 may assist the V-UE 305. For example, although the V-UE 305 may be designed to be tolerant to thermal issues, performance of the V-UE 305 may nevertheless be degraded by extreme environmental temperatures. The first UE 310, which may be in more temperate conditions than the V-UE 305 (e.g., within the vehicle 315) may provide improved communication performance in such conditions.

Figure 4 is a diagram illustrating examples 400, 405, and 410 of uplink UE aggregation. Example 400 includes a network node 110, a V-UE 415 (e.g., UE 120, V-UE 305) , and a first UE 420 (e.g., UE 120, first UE 310) .

Example 400 is an example of uplink relaying from the V-UE 415. In example 400, the V-UE 415 may receive data from the first UE 420 (e.g., via an interface 330) , and may transmit the data (or information derived from the data) on an uplink to the network node 110 (e.g., via an interface 320) . For example, the V-UE 415 may act as a relay (e.g., a Layer 2 UE-to-network relay, a Layer 3 relay, a repeater, or another form of relay) for the first UE 420. Relaying may be beneficial because the V-UE 415 may experience lower path loss than the first UE 420.

Example 405 is an example of uplink single-frequency-network (SFN) transmission. In example 405, the V-UE 415 and the first UE 420 may transmit uplink data using a same set of transmission parameters (e.g., frequency resource, time resource, radio network temporary identifier) such that the network node 110 receives the uplink data from both the V-UE 415 and the first UE 420 as a single transmission. This is referred to as SFN transmission. The V-UE 415 and the first UE 420 may coordinate (or the network node 110 may configure the V-UE 415 and the first UE 420) such that the V-UE 415 and the first UE 420 use the same radio network temporary identifier (RNTI) for transmission of the uplink data (which may be a dedicated RNTI for UE coordination, or one of the V-UE 415 and the first UE 420 may share its RNTI with the other of the V-UE 415 and the first UE 420) . SFN transmission may involve synchronization of an uplink or downlink (uplink/downlink) processing time and UE coordination on resource allocation. SFN transmission may use centralized scheduling and configuration at the network node 110, or may use UE-based coordination.

Example 410 is an example of transmission switching. In transmission switching, one or more of the V-UE 415 or the first UE 420 is configured to transmit uplink data at a given time. For example, the network node 110, the V-UE 415, or the first UE 420 may select which UE, of the V-UE 415 or the first UE 420, is to transmit the uplink data. This selection may be according to one or more criteria, such as a channel measurement.

Figure 5 is a diagram illustrating an example 500 of signaling relating to SRS configuration and transmission for UE aggregation. Example 500 includes a network node (e.g., network node 110) , a first UE (e.g., first UE 420, first UE 310) , and a V-UE (e.g., V-UE 415, V-UE 305) . In some aspects, the first UE and the V-UE may be associated with (e.g., the V-UE may be mounted to, and the first UE may be within) a vehicle (e.g., vehicle 315) . In some aspects, the first UE and the V-UE may be associated with one another. For example, the first UE and the V-UE may have established an interface (e.g., interface 325) or other form of connection with one another. As another example, the first UE and the V-UE may have discovered one another. Example 500 is an example of UE aggregation involving SFN transmission using an SFN configuration (as described with regard to example 405 of Fig. 4) in which the network node may not be aware of the SFN configuration (e.g., the UE aggregation is transparent to the network node) . In some aspects, the first UE and the V-UE may synchronize with the network node. For example, the first UE and the V-UE may obtain accurate synchronization.

As shown in Figure 5, and by reference number 510, in some examples, the first UE may transmit, and the network node may receive, a transmission configuration (sometimes referred to as information regarding an SRS configuration for the first UE and the V-UE) . For example, the first UE may report a transmission configuration to the network node so that the network node can schedule an SRS resource (such as by configuring an SRS configuration) for the first UE and the V-UE.

In some aspects, the transmission configuration may indicate a number of SRS ports corresponding to the V-UE and the first UE (such as via a parameter nrofSRS-Ports) . For example, if spatial multiplexing can be achieved by the first UE and the V-UE’s UE aggregation, the first UE may report more than 1 (one) SRS port. If more than 1 SRS port is configured as part of an SRS configuration, an SRS antenna port can distinguish between the first UE and the V-UE. For example, the first UE may be associated with a first SRS antenna port and the V-UE may be associated with a second SRS antenna port different from the first antenna port. Thus, a single SRS configuration, including multiple SRS ports, can apply to the first UE and to the V-UE.

In some aspects, the first UE and/or the V-UE may transmit capability information. The capability information may include one or more capabilities. In some aspects, the capability information may relate to an SRS capability, such as a number of ports, a number of SRS resources or resource sets, or the like. In some aspects, the capability information may relate to UE aggregation. For example, the capability information may indicate that the first UE and the V-UE are capable of UE aggregation. As another example, the capability information may indicate whether the first UE and the V-UE perform SFN transmission or transmission switching. As another example, the capability information may indicate a transmit power, a bandwidth capability, or a modulation and coding scheme (MCS) supported by a corresponding UE. The network node may configure SRS configurations and/or an uplink transmission scheme (described elsewhere herein) using the capability information. For example, the network node may configure a number of SRS ports, resources, or resource sets according to the capability information. As another example, the network node may configure an uplink transmission scheme for the first UE and/or the V-UE according to the capability information.

As shown by reference number 520, the network node may transmit, and the first UE may receive (e.g., directly or via the V-UE) , an SRS configuration. The SRS configuration may include one or more parameters for SRS transmission, such as a number of SRS ports, an SRS resource and/or resource set (e.g., a time resource, a frequency resource, or a combination thereof) , and a cyclic shift (e.g., cyclic shift offset) for the SRS) . In some aspects, the SRS configuration may be derived using the transmission configuration. For example, the SRS configuration may include a number of SRS ports indicated by the transmission configuration.

As shown by reference number 530, in some examples, the first UE may transmit, and the V-UE may receive, SRS scheduling information. For example, the first UE may determine that UE aggregation is to be used in association with transmit power boosting (such as according to a channel condition measurement or an implementation of the first UE or the V-UE) . In this example, the SRS configuration may indicate a same number of SRS ports as if the first UE does not implement UE aggregation. For example, the transmission configuration may indicate the same number of SRS ports as if the first UE does not implement UE aggregation. In this example, the first UE may transmit, to the second UE, SRS scheduling information. The SRS scheduling information may indicate a time resource, a frequency resource, a code resource (e.g., a cyclic shift or one or more other code parameters) , or a combination thereof, for transmission of the SRS. Thus, the first UE may coordinate with the V-UE regarding transmission of an SRS in accordance with the SRS configuration.

As shown by reference number 540, the first UE and the V-UE may transmit an SRS as an SFN transmission. For example, the first UE and the V-UE may transmit the SRS on a same time, frequency, and code resource. In some aspects, the network node may trigger at least one of the first UE or the V-UE to transmit the SRS. For example, the network node may trigger the first UE to transmit the SRS, and the first UE may coordinate with the V-UE to transmit the SRS. As another example, the network node may trigger both the first UE and the V-UE to transmit the SRS. In some aspects, the network node may perform an operation using on the SRS. For example, the network node may measure the SRS according to the SRS configuration, and may configure an uplink transmission of the first UE or the V-UE based using a measurement of the SRS (e.g., according to an uplink channel parameter derived from measuring the SRS) .

Figure 6 is a diagram illustrating an example 600 of signaling relating to SRS configuration and transmission for UE aggregation. Example 600 includes a network node (e.g., network node 110) , a first UE (e.g., first UE 420, first UE 310) , and a V-UE (e.g., V-UE 415, V-UE 305) . In some aspects, the first UE and the V-UE may be associated with (e.g., the V-UE may be mounted to, and the first UE may be within) a vehicle (e.g., vehicle 315) . In some aspects, the first UE and the V-UE may be associated with one another. For example, the first UE and the V-UE may have established an interface (e.g., interface 325) or other form of connection with one another. As another example, the first UE and the V-UE may have discovered one another. Example 600 is an example of UE aggregation involving SFN transmission (as described with regard to example 405 of Fig. 4) in which the network node is aware of the SFN transmission (e.g., the UE aggregation is not transparent to the network node) .

As shown in Figure 6, and by reference number 610, in some examples, the first UE and the V-UE may coordinate with one another to share an RNTI. For example, the first UE may transmit information indicating an RNTI of the first UE to the V-UE. The V-UE may then use the first UE’s RNTI for SFN transmission (e.g., of SRS) . This may apply, for example, when the network node has identified the RNTI of the first UE and another RNTI of the V-UE. It should be noted that there are other aspects of example 600 in which the first UE and the V-UE may transmit using different RNTIs, which are described below with regard to a first SRS configuration and a second SRS configuration.

As shown by reference number 620, the network node may transmit, to the first UE and/or the V-UE, one or more SRS configurations. In some aspects, the network node may transmit a same SRS configuration (e.g., indicating a same SRS resource) to the first UE and the V-UE. Thus, the SRS resource may be identical between the V-UE and the first UE. In some aspects, the SRS configuration may include SRS scheduling information, which may indicate, for example, a frequency resource, a time resource, a code resource (e.g., a cyclic shift) , or the like.

In some aspects, the network node may transmit a first SRS configuration to the first UE and a second SRS configuration to the V-UE. The first SRS configuration may be different from the second SRS configuration. For example, the first SRS configuration may indicate a first SRS resource and the second SRS configuration may indicate a second SRS resource. For example, the first SRS configuration may indicate a first cyclic shift and the second SRS configuration may indicate a second cyclic shift different from the first cyclic shift. In this example, the first SRS configuration and the second SRS configuration may have a same number of SRS symbols (nSymbSRS) , a same frequency domain starting position (k₀) , and a same time domain starting position. Additionally, or alternatively, the first SRS configuration may indicate a first SRS port and the second SRS configuration may indicate a second SRS port. Thus, the network node may minimize a measurement difference between the first UE and the V-UE by scheduling SRSs in the same frequency and time resources with different cyclic shifts. In this example, the network node may determine an uplink channel parameter according to the SRSs, such as by combining the uplink channel based on the SRS transmitted by each UE (e.g., on different SRS ports) . The network node may use this uplink channel parameter to configure an uplink transmission. For example, the network node may select whether to use single-port transmission (by one of the first UE or the V-UE) , antenna switching (as in example 410) or uplink MIMO transmission according to the uplink channel parameter, and may indicate the selection to the first UE and/or the V-UE.

As shown by reference number 630, the first UE and the V-UE may each transmit an SRS. For example, the first UE and the V-UE may transmit the SRS using a same RNTI. As another example, the first UE may transmit the SRS according to the first SRS configuration on a first SRS resource using a first RNTI, and the second UE may transmit the SRS according to the second SRS configuration on a second SRS resource using a second RNTI. In some aspects, the SRS as transmitted by the first UE may use a first cyclic shift and the SRS as transmitted by the second UE may use a second cyclic shift.

As shown by reference number 640, in some examples, the first UE and the V-UE may coordinate with one another to resolve a collision. For example, the first UE or the V-UE may identify a collision between the SRS (e.g., an SRS resource on which the SRS is transmitted) and another communication (e.g., a resource on which the other communication is scheduled) . In some aspects, the other communication may be a physical uplink shared channel transmission of the first UE. The first UE and the V-UE may coordinate with one another to resolve the collision. For example, the first UE may select a communication, of the SRS or the other communication, to transmit, and the first UE and/or the V-UE may transmit the selected communication. As another example, the V-UE may transmit the SRS and the first UE may transmit the other communication (e.g., in accordance with signaling between the first UE and the V-UE) .

Figure 7 is a diagram illustrating an example 700 of signaling relating to SRS configuration and transmission for UE aggregation. Example 700 includes a network node (e.g., network node 110) , a first UE (e.g., first UE 420, first UE 310) , and a V-UE (e.g., V-UE 415, V-UE 305) . In some aspects, the first UE and the V-UE may be associated with (e.g., the V-UE may be mounted to, and the first UE may be within) a vehicle (e.g., vehicle 315) . In some aspects, the first UE and the V-UE may be associated with one another. For example, the first UE and the V-UE may have established an interface (e.g., interface 325) or other form of connection with one another. As another example, the first UE and the V-UE may have discovered one another. Example 700 is an example of UE aggregation involving transmission switching (as described with regard to example 410 of Fig. 4) in which the network node may not be aware of the transmission switching (e.g., the UE aggregation is transparent to the network node) . Thus, in transmission switching, the first UE and the V-UE may transmit uplink data in different resources, and the network node may detect a combined uplink data packet. Transmission switching may provide for uplink data transmission in different time resources, different frequency resources, or different code resources by the first UE and the V-UE.

As shown in Figure 7, and by reference number 710, the network node may transmit, and the first UE may receive (directly or via the V-UE) , an SRS configuration. The SRS configuration may include any of the information described with regard to the SRS configuration of Figure 5.

As shown by reference number 720, the first UE and the V-UE may coordinate to select a UE for transmission of an SRS or data according to measurement information. For example, the first UE may transmit measurement information (e.g., channel information, reference signal measurement information, path loss information, or the like) to the V-UE. As another example, the V-UE may transmit measurement information (e.g., channel information, reference signal measurement information, path loss information, or the like) to the first UE. The first UE and/or the V-UE may select one or more UEs, of the first UE or the V-UE, for transmission of uplink data and/or an SRS. For example, the V-UE may transmit uplink data or an SRS on behalf of the first UE if the first UE is associated with a penetration loss that satisfies a threshold. Thus, the V-UE may be considered a “ghost” of the first UE, since the V-UE may transmit the SRS and/or the uplink data, thereby achieving improved uplink performance.

As shown by reference number 730, one or more of the first UE or the V-UE may transmit the SRS or the uplink data. For example, a selected one or more of the first UE or the V-UE may transmit the SRS or the uplink data. In some aspects, the network node may trigger at least one of the first UE or the V-UE to transmit the SRS. For example, the network node may trigger the first UE to transmit the SRS, and the first UE may coordinate with the V-UE to transmit the SRS (or a selected one or more of the first UE or the V-UE may transmit the SRS) . As another example, the network node may trigger both the first UE and the V-UE to transmit the SRS, and a selected one or more of the first UE or the V-UE may transmit the SRS. In some aspects, the network node may perform an operation using the SRS. For example, the network node may measure the SRS according to the SRS configuration, and may configure an uplink transmission of the first UE or the V-UE using the measurement of the SRS (e.g., according to an uplink channel parameter derived from measuring the SRS) .

Figure 8 is a diagram illustrating an example 800 of signaling relating to SRS configuration and transmission for UE aggregation. Example 800 includes a network node (e.g., network node 110) , a first UE (e.g., first UE 420, first UE 310) , and a V-UE (e.g., V-UE 415, V-UE 305) . In some aspects, the first UE and the V-UE may be associated with (e.g., the V-UE may be mounted to, and the first UE may be within) a vehicle (e.g., vehicle 315) . In some aspects, the first UE and the V-UE may be associated with one another. For example, the first UE and the V-UE may have established an interface (e.g., interface 325) or other form of connection with one another. As another example, the first UE and the V-UE may have discovered one another. Example 800 is an example of UE aggregation involving transmission switching (as described with regard to example 410 of Fig. 4) in which the network node is aware of the transmission switching (e.g., the UE aggregation is not transparent to the network node) .

As shown in Figure 8, and by reference number 810, the network node may transmit, and the first UE may receive, a first SRS configuration. As shown by reference number 820, the network node may transmit, and the V-UE may receive, a second SRS configuration. The first SRS configuration may be different from the second SRS configuration in accordance with the V-UE being associated with the first UE. For example, the network node may configure different SRS configurations for the first UE and the V-UE because the first UE and the V-UE are associated with one another (e.g., to sound different bandwidths of the communication channel) . In some aspects, the first SRS configuration may indicate a first bandwidth (C_SRS) and the second SRS configuration may indicate a second bandwidth that is different from the first bandwidth. In some aspects, one of the first bandwidth or the second bandwidth may be a proper subset of the other of the first bandwidth or the second bandwidth. For example, the second bandwidth may include the first bandwidth. In some aspects, the first bandwidth and the second bandwidth may be part of a same bandwidth part configured and active for both the first UE and the V-UE. In some aspects, the first bandwidth may be part of a first bandwidth part and the second bandwidth may be part of a second bandwidth part that is different from the first bandwidth part.

By configuring different bandwidths for the V-UE and the first UE, the network node may reduce UE transmission power usage and complexity. In effect, the network node can allocate resources to each UE, of the V-UE and the first UE, using capabilities of each UE. For example, the second bandwidth may be wider than the first bandwidth in accordance with the V-UE being less power-limited than the first UE. As another example, the V-UE’s lower path loss or signal attenuation may enable the V-UE to transmit a transport block using a larger bandwidth in accordance with an SRS measurement on the larger bandwidth (and/or using an uplink buffer status report of the first UE) . In this example, the network node may also configure the first UE to transmit a portion of the transport block using a smaller bandwidth corresponding to the first bandwidth.

As shown by reference number 830, the network node may trigger one or more of the first UE or the V-UE to transmit an SRS. For example, the network node may trigger the first UE to transmit an SRS in accordance with the first SRS configuration, and/or may configure the second UE to transmit the SRS in accordance with the second SRS configuration.

As shown by reference number 840, the first UE and/or the V-UE may transmit the SRS. For example, the first UE may transmit the SRS on a first bandwidth and the second UE may transmit the SRS on a second bandwidth that is different from the first bandwidth. As mentioned above, in some aspects, the second bandwidth may be wider than the first bandwidth and/or may include the first bandwidth.

As shown by reference number 850, the network node may measure the SRS as transmitted by the first UE and/or the V-UE. For example, the network node may measure the SRS as transmitted by the first UE on the first bandwidth and the SRS as transmitted by the second UE on the second bandwidth. The network node may identify an uplink channel parameter using the SRS. As just one example, the network node may identify a first path loss corresponding to the first UE and a second path loss corresponding to the V-UE. As another example, the network node may determine a first modulation or coding parameter (e.g., a first modulation and coding scheme (MCS) ) corresponding to the first UE and a second modulation or coding parameter (e.g., a second MCS) corresponding to the second UE.

As shown by reference number 860, the network node may configure an uplink transmission scheme of the first UE or the vehicle UE. For example, the network node may configure the uplink transmission scheme using an uplink channel parameter derived from measuring the SRS. As used herein, configuring an uplink transmission scheme may include configuring an uplink transmission, such as configuring a transmission parameter for the uplink transmission (e.g., MCS, transport block size, a portion of a transport block to be transmitted by a given UE) , selecting a UE to perform an uplink transmission, or scheduling the uplink transmission.

In some aspects, the network node may configure the V-UE to transmit a first part of a communication and configure the first UE to transmit a second part of the communication. For example, the network node may configure the V-UE to transmit an entire packet (according to an SRS measurement, described with respect to reference number 850, of the SRS as transmitted by the V-UE on the second bandwidth) , and may configure the first UE to transmit a subset of the packet (according to an SRS measurement, described with respect to reference number 850, of the SRS as transmitted by the first UE on the first bandwidth) . In some aspects, this may use on an uplink buffer status report of the first UE satisfying a threshold. As another example, the network node may configure the V-UE to transmit a first part of the communication using a first MCS and configure the first UE to transmit a second part of the communication using a second MCS. In this example, the network node may configure the V-UE to transmit the first part in a first resource and configure the first UE to transmit the second part in a second resource. In some aspects, the network node may transmit information indicating a partition between the first part and the second part to the V-UE and/or the first UE. Additionally, or alternatively, the first UE or the V-UE may determine the partition between the first part and the second part.

Figure 9 is a flowchart illustrating an example process 900 performed, for example, at a UE that supports SRS transmission for UE aggregation in accordance with the present disclosure. Example process 900 is an example where a first UE (for example, UE 120, the first UE 310, the first UE 420, the first UE of Figures 5-8) performs operations associated with SRS transmission for UE aggregation.

As shown in Figure 9, in some aspects, process 900 may include transmitting information regarding an SRS configuration for the first UE and a vehicle UE associated with the first UE (block 910) . For example, the UE (such as by using communication manager 140 or transmission component 1104, depicted in Figure 11) may transmit information regarding an SRS configuration for the first UE and a vehicle UE associated with the first UE, as described above.

As further shown in Figure 9, in some aspects, process 900 may include receiving the SRS configuration (block 920) . For example, the UE (such as by using communication manager 140 or reception component 1102, depicted in Figure 11) may receive the SRS configuration, as described above.

As further shown in Figure 9, in some aspects, process 900 may include coordinating with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration (block 930) . For example, the UE (such as by using communication manager 140 or coordination component 1108, depicted in Figure 11) may coordinate with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration, as described above.

As further shown in Figure 9, in some aspects, process 900 may include transmitting the SRS in accordance with the SRS configuration (block 940) . For example, the UE (such as by using communication manager 140 or transmission component 1104, depicted in Figure 11) may transmit the SRS in accordance with the SRS configuration, as described above.

Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.

In a first additional aspect, transmitting the information regarding the SRS configuration further includes transmitting the information to the vehicle UE.

In a second additional aspect, alone or in combination with the first aspect, receiving the SRS configuration further comprises receiving the SRS configuration prior to transmitting the information regarding the SRS configuration, and the information regarding the SRS configuration includes SRS scheduling information associated with the SRS configuration.

In a third additional aspect, alone or in combination with one or more of the first and second aspects, coordinating with the vehicle UE further comprises transmitting measurement information to the vehicle UE, and process 900 further comprises selecting a UE, of the first UE or the vehicle UE, to transmit the SRS using the measurement information.

In a fourth additional aspect, alone or in combination with one or more of the first through third aspects, the information regarding the SRS configuration indicates a number of SRS ports corresponding to the vehicle UE and the first UE, and transmitting the information regarding the SRS configuration further comprises transmitting the information regarding the SRS configuration to a network node.

In a fifth additional aspect, alone or in combination with one or more of the first through fourth aspects, coordinating with the vehicle UE further comprises selecting a UE, of the vehicle UE or the first UE, to transmit the SRS in association with a collision between the SRS and another communication.

Although Figure 9 shows example blocks of process 900, in some aspects, process 900 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 9. Additionally or alternatively, two or more of the blocks of process 900 may be performed in parallel.

Figure 10 is a flowchart illustrating an example process 1000 performed, for example, at a network node that supports SRS transmission for UE aggregation in accordance with the present disclosure. Example process 1000 is an example where the network node (for example, network node 110) performs operations associated with SRS transmission for UE aggregation.

As shown in Figure 10, in some aspects, process 1000 may include transmitting a first SRS configuration to a first UE (block 1010) . For example, the network node (such as by using communication manager 150 or transmission component 1204, depicted in Figure 12) may transmit a first SRS configuration to a first UE, as described above.

As further shown in Figure 10, in some aspects, process 1000 may include transmitting a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE (block 1020) . For example, the network node (such as by using communication manager 150 or transmission component 1204, depicted in Figure 12) may transmit a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE, as described above.

As further shown in Figure 10, in some aspects, process 1000 may include triggering at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration (block 1030) . For example, the network node (such as by using communication manager 150 or transmission component 1204, depicted in Figure 12) may trigger at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration, as described above.

Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.

In a first additional aspect, the first SRS configuration has a first cyclic shift and the second SRS configuration has a second cyclic shift different from the first cyclic shift.

In a second additional aspect, alone or in combination with the first aspect, the first SRS configuration and the second SRS configuration indicate a same time resource and a same frequency resource for the SRS.

In a third additional aspect, alone or in combination with one or more of the first and second aspects, process 1000 includes measuring the SRS in accordance with the first SRS configuration and the second SRS configuration, identifying an uplink channel parameter using the SRS, and configuring an uplink transmission of the first UE or the vehicle UE using the uplink channel parameter.

In a fourth additional aspect, alone or in combination with one or more of the first through third aspects, the first SRS configuration has a first bandwidth and the second SRS configuration has a second bandwidth different from the first bandwidth.

In a fifth additional aspect, alone or in combination with one or more of the first through fourth aspects, the first bandwidth is a proper subset of the second bandwidth.

In a sixth additional aspect, alone or in combination with one or more of the first through fifth aspects, process 1000 includes measuring the SRS in accordance with the first SRS configuration and the second SRS configuration, identifying an uplink channel parameter using the SRS, and configuring the vehicle UE to transmit a communication, and the first UE to transmit a part of the communication, in accordance with the uplink channel parameter.

In a seventh additional aspect, alone or in combination with one or more of the first through sixth aspects, process 1000 includes measuring the SRS in accordance with the first SRS configuration and the second SRS configuration, identifying an uplink channel parameter using the SRS, and configuring the vehicle UE to transmit a first part of a communication, and the first UE to transmit a second part of the communication, in accordance with the uplink channel parameter.

In an eighth additional aspect, alone or in combination with one or more of the first through seventh aspects, the first part of the communication is associated with a first modulation and coding scheme and the second part of the communication is associated with a second modulation and coding scheme lower than the first modulation and coding scheme.

Although Figure 10 shows example blocks of process 1000, in some aspects, process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 10. Additionally or alternatively, two or more of the blocks of process 1000 may be performed in parallel.

Figure 11 is a diagram of an example apparatus 1100 for wireless communication that supports SRS transmission for UE aggregation in accordance with the present disclosure. The apparatus 1100 may be a first UE, or a first UE may include the apparatus 1100. In some aspects, the apparatus 1100 includes a reception component 1102, a transmission component 1104, and a communication manager 140, which may be in communication with one another (for example, via one or more buses) . As shown, the apparatus 1100 may communicate with another apparatus 1106 (such as a UE, a network node, or another wireless communication device) using the reception component 1102 and the transmission component 1104.

In some aspects, the apparatus 1100 may be configured to and/or operable to perform one or more operations described herein in connection with Figures 3-8. Additionally or alternatively, the apparatus 1100 may be configured to and/or operable to perform one or more processes described herein, such as process 900 of Figure 9. In some aspects, the apparatus 1100 may include one or more components of the first UE described above in connection with Figure 2.

The reception component 1102 may receive communications, such as reference signals, control information, and/or data communications, from the apparatus 1106. The reception component 1102 may provide received communications to one or more other components of the apparatus 1100, such as the communication manager 140. In some aspects, the reception component 1102 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components. In some aspects, the reception component 1102 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, and/or a memory of the first UE described above in connection with Figure 2.

The transmission component 1104 may transmit communications, such as reference signals, control information, and/or data communications, to the apparatus 1106. In some aspects, the communication manager 140 may generate communications and may transmit the generated communications to the transmission component 1104 for transmission to the apparatus 1106. In some aspects, the transmission component 1104 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1106. In some aspects, the transmission component 1104 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, and/or a memory of the first UE described above in connection with Figure 2. In some aspects, the transmission component 1104 may be co-located with the reception component 1102 in a transceiver.

The communication manager 140 may transmit or may cause the transmission component 1104 to transmit information regarding an SRS configuration for the first UE and a vehicle UE associated with the first UE. The communication manager 140 may receive or may cause the reception component 1102 to receive the SRS configuration. The communication manager 140 may coordinate with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration. The communication manager 140 may transmit or may cause the transmission component 1104 to transmit the SRS in accordance with the SRS configuration. In some aspects, the communication manager 140 may perform one or more operations described elsewhere herein as being performed by one or more components of the communication manager 140.

The communication manager 140 may include one or more controller/processors and/or one or more memories, of the first UE described above in connection with Figure 2. In some aspects, the communication manager 140 includes a set of components, such as a coordination component 1108. Alternatively, the set of components may be separate and distinct from the communication manager 140. In some aspects, one or more components of the set of components may include or may be implemented within one or more controller/processors and/or one or more memories of the first UE described above in connection with Figure 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

The transmission component 1104 may transmit information regarding an SRS configuration for the first UE and a vehicle UE associated with the first UE. The reception component 1102 may receive the SRS configuration. The coordination component 1108 may coordinate with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration. The transmission component 1104 may transmit the SRS in accordance with the SRS configuration.

The number and arrangement of components shown in Figure 11 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Figure 11. Furthermore, two or more components shown in Figure 11 may be implemented within a single component, or a single component shown in Figure 11 may be implemented as multiple, distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 11 may perform one or more functions described as being performed by another set of components shown in Figure 11.

Figure 12 is a diagram of an example apparatus 1200 for wireless communication that supports SRS transmission for UE aggregation in accordance with the present disclosure. The apparatus 1200 may be a network node, or a network node may include the apparatus 1200. In some aspects, the apparatus 1200 includes a reception component 1202, a transmission component 1204, and a communication manager 150, which may be in communication with one another (for example, via one or more buses) . As shown, the apparatus 1200 may communicate with another apparatus 1206 (such as a UE, a network node, or another wireless communication device) using the reception component 1202 and the transmission component 1204.

In some aspects, the apparatus 1200 may be configured to and/or operable to perform one or more operations described herein in connection with Figures 3-8. Additionally or alternatively, the apparatus 1200 may be configured to and/or operable to perform one or more processes described herein, such as process 1000 of Figure 10. In some aspects, the apparatus 1200 may include one or more components of the network node described above in connection with Figure 2.

The reception component 1202 may receive communications, such as reference signals, control information, and/or data communications, from the apparatus 1206. The reception component 1202 may provide received communications to one or more other components of the apparatus 1200, such as the communication manager 150. In some aspects, the reception component 1202 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components. In some aspects, the reception component 1202 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, and/or a memory of the network node described above in connection with Figure 2.

The transmission component 1204 may transmit communications, such as reference signals, control information, and/or data communications, to the apparatus 1206. In some aspects, the communication manager 150 may generate communications and may transmit the generated communications to the transmission component 1204 for transmission to the apparatus 1206. In some aspects, the transmission component 1204 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1206. In some aspects, the transmission component 1204 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, and/or a memory of the network node described above in connection with Figure 2. In some aspects, the transmission component 1204 may be co-located with the reception component 1202 in a transceiver.

The communication manager 150 may transmit or may cause the transmission component 1204 to transmit a first SRS configuration to a first UE. The communication manager 150 may transmit or may cause the transmission component 1204 to transmit a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE. The communication manager 150 may trigger at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration. In some aspects, the communication manager 150 may perform one or more operations described elsewhere herein as being performed by one or more components of the communication manager 150.

The communication manager 150 may include a controller/processor, a memory, a scheduler, and/or a communication unit of the network node described above in connection with Figure 2. In some aspects, the communication manager 150 includes a set of components, such as a measurement component 1208, an identification component 1210, and/or a configuration component 1212. Alternatively, the set of components may be separate and distinct from the communication manager 150. In some aspects, one or more components of the set of components may include or may be implemented within a controller/processor, a memory, a scheduler, and/or a communication unit of the network node described above in connection with Figure 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

The transmission component 1204 may transmit a first SRS configuration to a first UE. The transmission component 1204 may transmit a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE. The transmission component 1204 may trigger at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration.

The measurement component 1208 may measure the SRS in accordance with the first SRS configuration and the second SRS configuration. The identification component 1210 may identify an uplink channel parameter using the SRS. The configuration component 1212 may configure an uplink transmission of the first UE or the vehicle UE using the uplink channel parameter.

The measurement component 1208 may measure the SRS in accordance with the first SRS configuration and the second SRS configuration. The identification component 1210 may identify an uplink channel parameter using the SRS. The configuration component 1212 may configure the vehicle UE to transmit a communication, and the first UE to transmit a part of the communication, in accordance with the uplink channel parameter.

The measurement component 1208 may measure the SRS in accordance with the first SRS configuration and the second SRS configuration. The identification component 1210 may identify an uplink channel parameter using the SRS.

The configuration component 1212 may configure the vehicle UE to transmit a first part of a communication, and the first UE to transmit a second part of the communication, in accordance with the uplink channel parameter.

The number and arrangement of components shown in Figure 12 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Figure 12. Furthermore, two or more components shown in Figure 12 may be implemented within a single component, or a single component shown in Figure 12 may be implemented as multiple, distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 12 may perform one or more functions described as being performed by another set of components shown in Figure 12.

The following provides an overview of some Aspects of the present disclosure:

Aspect 1: A method of wireless communication performed at a first user equipment (UE) , comprising: transmitting information regarding a sounding reference signal (SRS) configuration for the first UE and a vehicle UE associated with the first UE; receiving the SRS configuration; coordinating with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration; and transmitting the SRS in accordance with the SRS configuration.

Aspect 2: The method of Aspect 1, wherein transmitting the information regarding the SRS configuration further comprises transmitting the information to the vehicle UE.

Aspect 3: The method of Aspect 2, wherein receiving the SRS configuration further comprises receiving the SRS configuration prior to transmitting the information regarding the SRS configuration, and wherein the information regarding the SRS configuration includes SRS scheduling information associated with the SRS configuration.

Aspect 4: The method of Aspect 3, wherein coordinating with the vehicle UE further comprises transmitting measurement information to the vehicle UE, and wherein the method further comprises selecting a UE, of the first UE or the vehicle UE, to transmit the SRS using the measurement information.

Aspect 5: The method of any of Aspects 1-4, wherein the information regarding the SRS configuration indicates a number of SRS ports corresponding to the vehicle UE and the first UE, and wherein transmitting the information regarding the SRS configuration further comprises transmitting the information regarding the SRS configuration to a network node.

Aspect 6: The method of Aspect 5, wherein the network node is not aware of a UE aggregation associated with the first UE and the V-UE, and wherein the number of SRS ports includes a first SRS port associated with the first UE and a second SRS port associated with the V-UE.

Aspect 7: The method of any of Aspects 1-6, wherein coordinating with the vehicle UE further comprises selecting a UE, of the vehicle UE or the first UE, to transmit the SRS in association with a collision between the SRS and another communication.

Aspect 8: A method of wireless communication performed at a network node, comprising: transmitting a first sounding reference signal (SRS) configuration to a first UE;transmitting a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE; and triggering at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration.

Aspect 9: The method of Aspect 8, wherein the first SRS configuration has a first cyclic shift and the second SRS configuration has a second cyclic shift different from the first cyclic shift.

Aspect 10: The method of Aspect 9, wherein the first SRS configuration and the second SRS configuration indicate a same time resource and a same frequency resource for the SRS.

Aspect 11: The method of Aspect any of Aspects 8-10, further comprising: measuring the SRS in accordance with the first SRS configuration and the second SRS configuration; identifying an uplink channel parameter upon measuring the SRS; and configuring an uplink transmission of the first UE or the vehicle UE using the uplink channel parameter.

Aspect 12: The method of any of Aspects 8-11, wherein the first SRS configuration has a first bandwidth and the second SRS configuration has a second bandwidth different from the first bandwidth.

Aspect 13: The method of Aspect 12, further comprising: measuring the SRS in accordance with the first SRS configuration and the second SRS configuration; identifying an uplink channel parameter upon measuring the SRS; and configuring the vehicle UE to: transmit a communication, and the first UE to transmit a part of the communication, in accordance with the uplink channel parameter, or transmit a first part of a communication, and the first UE to transmit a second part of the communication, in accordance with the uplink channel parameter, wherein the first part of the communication is associated with a first modulation and coding scheme and the second part of the communication is associated with a second modulation and coding scheme lower than the first modulation and coding scheme.

Aspect 14: The method of any of Aspects 8-13, wherein the network node is aware of a UE aggregation associated with the first UE and the V-UE, and wherein the first SRS configuration and the second SRS configuration are associated with identifying an uplink transmission scheme for the first UE and the V-UE.

Aspect 15: The method of any of Aspects 8-14, wherein the method further comprises receiving a first capability from the first UE and a second capability from the second UE, wherein at least one of the first SRS configuration, the second SRS configuration, or an uplink transmission scheme of the first UE or the V-UE is derived using at least one of the first capability or the second capability.

Aspect 16: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of Aspects 1-15.

Aspect 17: A device for wireless communication, comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to perform the method of one or more of Aspects 1-15.

Aspect 18: An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 1-15.

Aspect 19: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 1-15.

Aspect 20: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-15.

The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construed as hardware or a combination of hardware and software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware or a combination of hardware and software. It will be apparent that systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems or methods is not limiting of the aspects. Thus, the operation and behavior of the systems or methods are described herein without reference to specific software code, because those skilled in the art will understand that software and hardware can be designed to implement the systems or methods based, at least in part, on the description herein.

As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.

As used herein, the term “determine” or “determining” encompasses a wide variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , identifying, inferring, ascertaining, measuring, and the like. Also, “determining” can include receiving (such as receiving information or receiving an indication) , accessing (such as accessing data stored in memory) , transmitting (such as transmitting information) and the like. Also, “determining” can include resolving, selecting, obtaining, choosing, establishing and other such similar actions. The term “identify” or “identifying” also encompasses a wide variety of actions and, therefore, “identifying” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , inferring, ascertaining, measuring, and the like. Also, “identifying” can include receiving (such as receiving information or receiving an indication) , accessing (such as accessing data stored in memory) , transmitting (such as transmitting information) and the like. Also, “identifying” can include resolving, selecting, obtaining, choosing, establishing and other such similar actions.

Even though particular combinations of features are recited in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically recited in the claims or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (for example, a + a, a + a + a, a + a + b, a + a + c, a +b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c) .

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” and similar terms are intended to be open-ended terms that do not limit an element that they modify (for example, an element “having” A may also have B) . Further, as used herein, “based on” is intended to be interpreted in the inclusive sense, unless otherwise explicitly indicated. For example, “based on” may be used interchangeably with “based at least in part on, ” “associated with” , or “in accordance with” unless otherwise explicitly indicated. Specifically, unless a phrase refers to “based on only ‘a, ’ ” or the equivalent in context, whatever it is that is “based on ‘a, ’ ” or “based at least in part on ‘a, ’ ” may be based on “a” alone or based on a combination of “a” and one or more other factors, conditions or information. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, ” unless explicitly stated otherwise (for example, if used in combination with “either” or “only one of” ) .

Claims

An apparatus for wireless communication at a first user equipment (UE) , comprising:

one or more memories storing processor-readable code; and

one or more processors coupled with the one or more memories, at least one processor of the one or more processors operable to cause the first UE to:

transmit information regarding a sounding reference signal (SRS) configuration for the first UE and a vehicle UE associated with the first UE;

receive the SRS configuration;

coordinate with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration; and

transmit the SRS in accordance with the SRS configuration.
The apparatus of claim 1, wherein the at least one processor, to cause the first UE to transmit the information regarding the SRS configuration, are operable to cause the first UE to transmit the information to the vehicle UE.
The apparatus of claim 2, wherein the at least one processor, to cause the first UE to receive the SRS configuration, is operable to cause the first UE to receive the SRS configuration prior to transmitting the information regarding the SRS configuration, and wherein the information regarding the SRS configuration includes SRS scheduling information associated with the SRS configuration.
The apparatus of claim 3, wherein the at least one processor, to cause the first UE to coordinate with the vehicle UE, is operable to cause the first UE to transmit measurement information to the vehicle UE, and wherein the at least one processor is operable to select a UE, of the first UE or the vehicle UE, to transmit the SRS using the measurement information.
The apparatus of claim 1, wherein the information regarding the SRS configuration indicates a number of SRS ports corresponding to the vehicle UE and the first UE, and wherein the at least one processor, to cause the first UE to transmit the information regarding the SRS configuration, is operable to cause the first UE to transmit the information regarding the SRS configuration to a network node.
The method of claim 5, wherein the network node is not aware of a UE aggregation associated with the first UE and the V-UE, and wherein the number of SRS ports includes a first SRS port associated with the first UE and a second SRS port associated with the V-UE.
The apparatus of claim 1, wherein the at least one processor, to cause the first UE to coordinate with the vehicle UE, is operable to cause the first UE to select a UE, of the vehicle UE or the first UE, to transmit the SRS in association with a collision between the SRS and another communication.
An apparatus for wireless communication at a network node, comprising:

one or more memories storing processor-readable code; and

one or more processors coupled with the one or more memories, at least one processor of the one or more processors operable to cause the network node to:

transmit a first sounding reference signal (SRS) configuration to a first UE;

transmit a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE; and

trigger at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration.
The apparatus of claim 8, wherein the first SRS configuration has a first cyclic shift and the second SRS configuration has a second cyclic shift different from the first cyclic shift.
The apparatus of claim 9, wherein the first SRS configuration and the second SRS configuration indicate a same time resource and a same frequency resource for the SRS.
The apparatus of claim 9, wherein the at least one processor is further operable to cause the network node to:

measure the SRS in accordance with the first SRS configuration and the second SRS configuration;

identify an uplink channel parameter upon measuring the SRS; and

configure an uplink transmission of the first UE or the vehicle UE using the uplink channel parameter.
The apparatus of claim 8, wherein the first SRS configuration has a first bandwidth and the second SRS configuration has a second bandwidth different from the first bandwidth.
The apparatus of claim 12, wherein the at least one processor is further operable to cause the network node to:

measure the SRS in accordance with the first SRS configuration and the second SRS configuration;

identify an uplink channel parameter upon measuring the SRS; and

configure the vehicle UE to:

transmit a communication, and the first UE to transmit a part of the communication, in accordance with the uplink channel parameter; or

transmit a first part of a communication, and the first UE to transmit a second part of the communication, in accordance with the uplink channel parameter, wherein the first part of the communication is associated with a first modulation and coding scheme and the second part of the communication is associated with a second modulation and coding scheme lower than the first modulation and coding scheme.
The apparatus of claim 8, wherein the apparatus is aware of a UE aggregation associated with the first UE and the V-UE, and wherein the first SRS configuration and the second SRS configuration are associated with identifying an uplink transmission scheme for the first UE and the V-UE.
The apparatus of claim 8, wherein the at least one processor is further operable to cause the network node to receive a first capability from the first UE and a second capability from the second UE, wherein at least one of the first SRS configuration, the second SRS configuration, or an uplink transmission scheme of the first UE or the V-UE is derived using at least one of the first capability or the second capability.
A method of wireless communication performed at a first user equipment (UE) , comprising:

transmitting information regarding a sounding reference signal (SRS) configuration for the first UE and a vehicle UE associated with the first UE;

receiving the SRS configuration;

coordinating with the vehicle UE regarding transmission of an SRS in accordance with the SRS configuration; and

transmitting the SRS in accordance with the SRS configuration.
The method of claim 16, wherein transmitting the information regarding the SRS configuration further comprises transmitting the information to the vehicle UE.
The method of claim 17, wherein receiving the SRS configuration further comprises receiving the SRS configuration prior to transmitting the information regarding the SRS configuration, and wherein the information regarding the SRS configuration includes SRS scheduling information associated with the SRS configuration.
The method of claim 17, wherein coordinating with the vehicle UE further comprises transmitting measurement information to the vehicle UE, and wherein the method further comprises selecting a UE, of the first UE or the vehicle UE, to transmit the SRS using the measurement information.
The method of claim 16, wherein the information regarding the SRS configuration indicates a number of SRS ports corresponding to the vehicle UE and the first UE, and wherein transmitting the information regarding the SRS configuration further comprises transmitting the information regarding the SRS configuration to a network node.
The method of claim 16, wherein coordinating with the vehicle UE further comprises selecting a UE, of the vehicle UE or the first UE, to transmit the SRS in association with a collision between the SRS and another communication.
A method of wireless communication performed at a network node, comprising:

transmitting a first sounding reference signal (SRS) configuration to a first UE;

transmitting a second SRS configuration to a vehicle UE associated with the first UE, wherein the second SRS configuration is different from the first SRS configuration in accordance with the vehicle UE being associated with the first UE; and

triggering at least one of the first UE or the vehicle UE to transmit an SRS in accordance with at least one of the first SRS configuration or the second SRS configuration.
The method of claim 22, wherein the first SRS configuration has a first cyclic shift and the second SRS configuration has a second cyclic shift different from the first cyclic shift.
The method of claim 23, wherein the first SRS configuration and the second SRS configuration indicate a same time resource and a same frequency resource for the SRS.
The method of claim 23, further comprising:

measuring the SRS in accordance with the first SRS configuration and the second SRS configuration;

identifying an uplink channel parameter upon measuring the SRS; and

configuring an uplink transmission of the first UE or the vehicle UE using the uplink channel parameter.
The method of claim 22, wherein the first SRS configuration has a first bandwidth and the second SRS configuration has a second bandwidth different from the first bandwidth.
The method of claim 26, wherein the first bandwidth is a proper subset of the second bandwidth.
The method of claim 26, further comprising:

measuring the SRS in accordance with the first SRS configuration and the second SRS configuration;

identifying an uplink channel parameter upon measuring the SRS; and

configuring the vehicle UE to:

transmit a communication, and the first UE to transmit a part of the communication, in accordance with the uplink channel parameter, or

transmit a first part of a communication, and the first UE to transmit a second part of the communication, in accordance with the uplink channel parameter, wherein the first part of the communication is associated with a first modulation and coding scheme and the second part of the communication is associated with a second modulation and coding scheme lower than the first modulation and coding scheme.
The method of claim 22, wherein the network node is aware of a UE aggregation associated with the first UE and the V-UE, and wherein the first SRS configuration and the second SRS configuration are associated with identifying an uplink transmission scheme for the first UE and the V-UE.
The method of claim 22, further comprising receiving a first capability from the first UE and a second capability from the second UE, wherein at least one of the first SRS configuration, the second SRS configuration, or an uplink transmission scheme of the first UE or the V-UE is derived using at least one of the first capability or the second capability.