Accessing unlicensed channels while accounting for metrics of extended reality devices
XR devices adjust CAPC and channel access parameters to expedite channel access, improving communication reliability and efficiency by synchronizing with other XR devices and prioritizing data flows, addressing the challenge of prolonged access times due to small PDBs.
Patent Information
- Application Number
- PCT/CN2024/072234
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-15
- Publication Date
- 2025-07-24
AI Technical Summary
Extended reality (XR) devices face challenges in accessing unlicensed channels due to their relatively small packet delay budget (PDB), leading to prolonged channel access times that can degrade user experience.
XR devices adjust their channel access priority class (CAPC) and parameters to expedite access, allowing for synchronized data transmission with other XR devices sharing a joint CAPC and prioritizing data flows based on priority indexes within a multi-modal service group.
This approach enhances communication reliability, reduces latency, and optimizes resource utilization by ensuring XR devices access unlicensed channels faster, maintaining an immersive experience and efficient data transmission.
Smart Images

Figure CN2024072234_24072025_PF_FP_ABST
Abstract
Description
ACCESSING UNLICENSED CHANNELS WHILE ACCOUNTING FOR METRICS OF EXTENDED REALITY DEVICES
[0001] INTRODUCTION
[0002] The following relates to wireless communications, including extended reality devices accessing unlicensed channels.
[0003] Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal FDMA (OFDMA) , or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) . A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE) .SUMMARY
[0004] The described techniques relate to improved methods, systems, devices, and apparatuses that support accessing unlicensed channels while accounting for metrics of extended reality devices.
[0005] A method for wireless communications by a first UE is described. The method may include receiving control signaling indicating a set of multiple channel access priority classes (CAPCs) associated with a channel access procedure for a shared channel, receiving a first control message indicating that the first UE is assigned a first CAPC of the set of multiple CAPCs, and performing, in accordance with a second CAPC of the set of multiple CAPCs, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget (PDB) for communication of the first data and the second CAPC corresponding to a remainder of the PDB.
[0006] A first UE for wireless communications is described. The first UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively operable to execute the code to cause the first UE to receive control signaling indicating a set of multiple CAPCs associated with a channel access procedure for a shared channel, receive a first control message indicating that the first UE is assigned a first CAPC of the set of multiple CAPCs, and perform, in accordance with a second CAPC of the set of multiple CAPCs, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a PDB for communication of the first data and the second CAPC corresponding to a remainder of the PDB.
[0007] Another first UE for wireless communications is described. The first UE may include means for receiving control signaling indicating a set of multiple CAPCs associated with a channel access procedure for a shared channel, means for receiving a first control message indicating that the first UE is assigned a first CAPC of the set of multiple CAPCs, and means for performing, in accordance with a second CAPC of the set of multiple CAPCs, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a PDB for communication of the first data and the second CAPC corresponding to a remainder of the PDB.
[0008] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to receive control signaling indicating a set of multiple CAPCs associated with a channel access procedure for a shared channel, receive a first control message indicating that the first UE is assigned a first CAPC of the set of multiple CAPCs, and perform, in accordance with a second CAPC of the set of multiple CAPCs, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a PDB for communication of the first data and the second CAPC corresponding to a remainder of the PDB.
[0009] Some examples of the method, first UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving control signaling indicating a set of multiple thresholds associated with multiple CAPCs of the set of multiple CAPCs, the remainder of the PDB satisfying a first threshold of the set of multiple thresholds, and the second CAPC corresponding to the first threshold.
[0010] Some examples of the method, first UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for performing the channel access procedure in accordance with one or more second channel access procedure parameters, the one or more second channel access procedure parameters different from one or more first channel access procedure parameters associated with the first CAPC.
[0011] Some examples of the method, first UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from a network entity, a second control message indicating the one or more second channel access procedure parameters and indicating to apply the one or more second channel access procedure parameters when performing the channel access procedure.
[0012] Some examples of the method, first UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to a network entity, a second control message indicating an application time for which the UE may be applying the second CAPC for the channel access procedure instead of the first CAPC.
[0013] Some examples of the method, first UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to a second UE, a second control message indicating to apply the first CAPC or the second CAPC, where the first UE and the second UE may be associated with a same multi-modal service identifier (ID) .
[0014] Some examples of the method, first UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving the first control message including a group ID associated with a multi-modal service, the first control message indicating to apply the first CAPC when performing the channel access procedure.
[0015] Some examples of the method, first UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving the first control message that indicates a first priority index for a first data flow and to apply a second priority index a second data flow of a multi-modal service and communicating the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.
[0016] In some examples of the method, first UEs, and non-transitory computer-readable medium described herein, a first data flow of a multi-modal service may be associated with a first priority index and a second data flow of the multi-modal service being associated with a second priority index and the method, apparatuses, and non-transitory computer-readable medium may include further operations, features, means, or instructions for communicating the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG. 1 shows an example of a wireless communications system that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure.
[0018] FIG. 2 shows an example of a network architecture that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure.
[0019] FIG. 3 shows an example of a wireless communications system that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure.
[0020] FIG. 4 shows an example of a process flow that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure.
[0021] FIGs. 5 and 6 show block diagrams of devices that support accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure.
[0022] FIG. 7 shows a block diagram of a communications manager that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure.
[0023] FIG. 8 shows a diagram of a system including a device that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure.
[0024] FIGs. 9 through 11 show flowcharts illustrating methods that support accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure.DETAILED DESCRIPTION
[0025] In some wireless communications systems, a UE may use an unlicensed radio spectrum to communicate with a network entity. In some examples, the network entity may configure the UE with a channel access priority class (CAPC) that may define a priority relative to one or more other UEs for the UE to access the unlicensed radio spectrum. The CAPC may be associated with one or more channel access parameters (e.g., contention window sizes, a channel occupancy time limit, a quantity of sensing slot durations) for attempting to access an unlicensed channel. For example, the UE may use the one or more channel access parameters to detect if a channel is in use (e.g., via a listen-before-talk (LBT) procedure or another clear channel assessment (CCA) procedure) . The UE may access the channel if the UE detects that the channel is not in use. If the UE detects that the channel is in use, the UE may use the one or more parameters to perform another LBT or CCA procedure. The one or more channel access parameters may be associated with CAPCs such that a UE with a higher CAPC may access the unlicensed channel faster than a UE with a lower CAPC.
[0026] Some types of UEs (e.g., extended reality (XR) UEs) may be UEs that support XR data communications, such as XR glasses, XR gloves, and the like. XR data may include virtual reality (VR) , augmented reality (AR) , or mixed reality (MR) data, such as data related to video or audio to be displayed to a user of XR glasses or tactile data collected from a user of XR gloves. As an illustrative example, XR devices may be used by one or more users to create a partially or fully immersive virtual environment. That is, via use of XR devices, a user may interact with the virtual environment via real-world movement, such as head movement, hand movement, foot movement, and so on.
[0027] In the example of AR or MR, the user may use an XR device (e.g., a smartphone, XR glasses, XR headset) to see information, text, objects, and so on overlayed onto a real-world environment. As an illustrative example, the XR device may display a video stream of the real-world environment, and may further display one or more virtual aspects (e.g., information or objects) overlayed onto the real-world environment. In the example of MR, a user may interact with digital objects (e.g., via movement using XR gloves or movement detected via an XR headset) .
[0028] In the example of VR, the user may use an XR device (e.g., a VR headset, XR glasses) to see a fully virtual environment. For example, via a head-mounted display or XR headset, the XR device may project a fully virtual environment to the user (e.g., without a video stream of the real-world environment) . In some examples, the user may interact with the virtual environment via movement (e.g., rotating the head of the user or taking steps forward to see a different view of the virtual environment) .
[0029] XR UEs may have a relatively small packet delay budget (PDB) as compared to other types of UEs. For example, to facilitate an immersive virtual environment, an XR UE may communicate data within a relatively shorter time duration than a non-XR UE. As an illustrative example, if a user of the XR UE attempts to interact with a virtual object (e.g., as in MR) , the XR UE may detect a movement of the user, transmit an indication of the movement to a network entity, and receive a data packet comprising video data for the XR UE to display to the user in response to the movement. Accordingly, the XR UE may transmit the movement indication and receive the video data within a PDB to enable a more immersive experience for the user (e.g., by allowing interaction with the virtual environment in real-time) .
[0030] In some examples, if the XR UE performs a channel access procedure to access an unlicensed channel as described herein, the XR UE may take a duration longer than a PDB of the XR UR to access the unlicensed channel and communicate XR data. For example, the XR UE may be assigned a CAPC associated with a quantity of sensing slot durations during which the XR UE may perform an LBT procedure. The XR UE may perform one or more communications using at least a portion of the PDB, and may have some XR data to communicate using a remaining PDB (RDB) (e.g., a portion of the PDB remaining after using a portion of the PDB) . If the quantity of sensing slot durations associated with the CAPC of the XR UE is longer than the RDB of the XR UE, the XR UE may communicate the XR data in a time duration longer than the PDB, which may decrease user experience.
[0031] As an illustrative example, a first XR UE may have a first RDB that is smaller than a second RDB of a second XR UE. However, if the first XR UE has a lower CAPC than the second XR UE, the first XR UE may access the channel to communicate data during a time duration that may exceed the first RDB. Additionally, in some examples, the first XR UE and the second XR UE may be multi-modal XR UEs (e.g., UEs that share a multi-modal service ID with one or more other XR UEs) . Accordingly, the first XR UE and the second XR UE may access the channel synchronously.
[0032] Accordingly, techniques described herein allow for an XR UE to update an assigned CAPC or one or more channel access parameters associated with the CAPC. For example, if the XR UE has an RDB that is smaller than a threshold, the XR UE may increase the CAPC (e.g., or the quantity of sensing slot durations or contention window size) to access the channel faster than with the assigned CAPC. In some examples, the XR UE may be a multi-modal XR UE. That is, the XR UE may share a service ID with one or more other multi-modal XR UEs. The multi-modal XR UEs may accordingly access the unlicensed channel and transmit data flows together (e.g., as if the multi-modal XR UEs were a single UE) .
[0033] If the XR UE is a multi-modal XR UE of a group of multi-modal XR UEs, the group of multi-modal XR UEs may share a joint CAPC (e.g., a CAPC that is shared between multiple UEs) . In some examples, different types of data flows (e.g., video data, audio data, tactile data) may have different priority indexes within a multi-modal service group. Accordingly, after accessing the unlicensed channel, the multi-modal XR UEs may communicate some types of flows (e.g., flows associated with a higher priority index) before some other types of flows (e.g., flows with a lower priority index) within a PDB.
[0034] By accounting for metrics (e.g., PDBs and RDBs) of XR UEs (e.g., multi-modal XR UEs) while accessing unlicensed channels and communicating updated channel access parameters and application times as described herein, the wireless communications system may experience improved communication reliability and reduced latency related to relatively faster access of unlicensed channels by increasing a CAPC. The described techniques may also allow for more efficient utilization of communication resources and improved coordination between devices by allowing groups of XR UEs (e.g., multi-modal XR UEs sharing a service ID) to use a joint CAPC to access the unlicensed channel and to determine an order of transmission of data flows using priority indexes.
[0035] Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to process flow diagrams, apparatus diagrams, system diagrams, and flowcharts that relate to accessing unlicensed channels while accounting for metrics of extended reality devices.
[0036] FIG. 1 shows an example of a wireless communications system 100 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 may be an LTE network, an LTE-A network, an LTE-A Pro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.
[0037] The network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities. In various examples, a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature. In some examples, network entities 105 and UEs 115 may wirelessly communicate via one or more communication links 125 (e.g., a radio frequency (RF) access link) . For example, a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs) .
[0038] The UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communications with various types of devices, such as other UEs 115 or network entities 105, as shown in FIG. 1.
[0039] As described herein, a node of the wireless communications system 100, which may be referred to as a network node, or a wireless node, may be a network entity 105 (e.g., any network entity described herein) , a UE 115 (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, a node may be a UE 115. As another example, a node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In yet other aspects of this example, the first, second, and third nodes may be different relative to these examples. Similarly, reference to a UE 115, network entity 105, apparatus, device, computing system, or the like may include disclosure of the UE 115, network entity 105, apparatus, device, computing system, or the like being a node. For example, disclosure that a UE 115 is configured to receive information from a network entity 105 also discloses that a first node is configured to receive information from a second node.
[0040] As described herein, a node, which may be referred to as a node, a network node, a network entity, or a wireless node, may be a base station (e.g., any base station described herein) , a UE (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, one or more components, and / or another suitable processing entity configured to perform any of the techniques described herein. For example, a network node may be a UE. As another example, a network node may be a base station. As another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a UE. In another aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a base station. In yet other aspects of this example, the first, second, and third network nodes may be different relative to these examples. Similarly, reference to a UE, base station, apparatus, device, computing system, or the like may include disclosure of the UE, base station, apparatus, device, computing system, or the like being a network node. For example, disclosure that a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node. Consistent with this disclosure, once a specific example is broadened in accordance with this disclosure (e.g., a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node) , the broader example of the narrower example may be interpreted in the reverse, but in a broad open-ended way. In the example above where a UE being configured to receive information from a base station also discloses that a first network node being configured to receive information from a second network node, the first network node may refer to a first UE, a first base station, a first apparatus, a first device, a first computing system, a first one or more components, a first processing entity, or the like configured to receive the information; and the second network node may refer to a second UE, a second base station, a second apparatus, a second device, a second computing system, a second one or more components, a second processing entity, or the like.
[0041] As described herein, communication of information (e.g., any information, signal, or the like) may be described in various aspects using different terminology. Disclosure of one communication term includes disclosure of other communication terms. For example, a first network node may be described as being configured to transmit information to a second network node. In this example and consistent with this disclosure, disclosure that the first network node is configured to transmit information to the second network node includes disclosure that the first network node is configured to provide, send, output, communicate, or transmit information to the second network node. Similarly, in this example and consistent with this disclosure, disclosure that the first network node is configured to transmit information to the second network node includes disclosure that the second network node is configured to receive, obtain, or decode the information that is provided, sent, output, communicated, or transmitted by the first network node.
[0042] In some examples, network entities 105 may communicate with the core network 130, or with one another, or both. For example, network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., in accordance with an S1, N2, N3, or other interface protocol) . In some examples, network entities 105 may communicate with one another via a backhaul communication link 120 (e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities 105) or indirectly (e.g., via a core network 130) . In some examples, network entities 105 may communicate with one another via a midhaul communication link 162 (e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link 168 (e.g., in accordance with a fronthaul interface protocol) , or any combination thereof. The backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., an electrical link, an optical fiber link) , one or more wireless links (e.g., a radio link, a wireless optical link) , among other examples or various combinations thereof. A UE 115 may communicate with the core network 130 via a communication link 155.
[0043] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a 5G NB, a next-generation eNB (ng-eNB) , a Home NodeB, a Home eNodeB, or other suitable terminology) . In some examples, a network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140) .
[0044] In the wireless communications system 100 a UE 115 and a network entity 105 (e.g., an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB, either of which may be referred to as a gNB, or some other base station) , may support wireless communications over one or multiple radio access technologies. Examples of radio access technologies include 4G systems, such as LTE systems, and 5G systems, which may be referred to as NR systems. The wireless communications system 100 may be configured to support techniques for probabilistic shaping based on block codes as described herein. For example, one or more devices may include a UE communications manager 101, which may be an example of communications managers as described herein. The UE 115 may, via the UE communications manager 101, a channel access procedure accounting for metrics of XR UEs 115. For example, via the communications manager 101, an XR UE 115 may update an assigned CAPC or one or more channel access parameters to account for an RDP of the XR UE 115. In some examples, a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) , which may be configured to utilize a protocol stack that is physically or logically distributed among two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 105 may include one or more of a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN Intelligent Controller (RIC) 175 (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) 180 system, or any combination thereof. An RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations) . In some examples, one or more network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) . Techniques described herein, in addition to or as an alternative to be carried out between UEs 115 and base stations 105, may be implemented via additional or alternative wireless devices, including IAB nodes 104, DUs 165, CUs 160, RUs 170, and the like. For example, in some implementations, aspects described herein may be implemented in the context of a disaggregated radio access network (RAN) architecture (e.g., open RAN architecture) . In a disaggregated architecture, the RAN may be split into three areas of functionality corresponding to the CU 160, the DU 165, and the RU 170. The split of functionality between the CU 160, DU 165, and RU 170 is flexible and as such gives rise to numerous permutations of different functionalities depending upon which functions (e.g., MAC functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at the CU 160, DU 165, and RU 170. For example, a functional split of the protocol stack may be employed between a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack.
[0045] Some wireless communications systems (e.g., wireless communications system 100) , infrastructure and spectral resources for NR access may additionally support wireless backhaul link capabilities in supplement to wireline backhaul connections, providing an IAB network architecture. One or more base stations 105 may include CUs 160, DUs 165, and RUs 170 and may be referred to as donor base stations 105 or IAB donors. One or more DUs 165 (e.g., and / or RUs 170) associated with a donor base station 105 may be partially controlled by CUs 160 associated with the donor base station 105. The one or more donor base stations 105 (e.g., IAB donors) may be in communication with one or more additional base stations 105 (e.g., IAB nodes 104) via supported access and backhaul links. IAB nodes 104 may support mobile terminal (MT) functionality controlled and / or scheduled by DUs 165 of a coupled IAB donor. In addition, the IAB nodes 104 may include DUs 165 that support communication links with additional entities (e.g., IAB nodes 104, UEs 115, etc. ) within the relay chain or configuration of the access network (e.g., downstream) . In such cases, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodes 104 or components of IAB nodes 104) may be configured to operate according to the techniques described herein.
[0046] In some examples, the wireless communications system 100 may include a core network 130 (e.g., a next generation core network (NGC) ) , one or more IAB donors, IAB nodes 104, and UEs 115, where IAB nodes 104 may be partially controlled by each other and / or the IAB donor. The IAB donor and IAB nodes 104 may be examples of aspects of base stations 105. IAB donor and one or more IAB nodes 104 may be configured as (e.g., or in communication according to) some relay chain.
[0047] For instance, an access network (AN) or RAN may refer to communications between access nodes (e.g., IAB donor) , IAB nodes 104, and one or more UEs 115. The IAB donor may facilitate connection between the core network 130 and the AN (e.g., via a wireline or wireless connection to the core network 130) . That is, an IAB donor may refer to a RAN node with a wireline or wireless connection to core network 130. The IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170) , where the CU 160 may communicate with the core network 130 over an NG interface (e.g., some backhaul link) . The CU 160 may host layer 3 (L3) (e.g., RRC, service data adaption protocol (SDAP) , PDCP, etc. ) functionality and signaling. The at least one DU 165 and / or RU 170 may host lower layer, such as layer 1 (L1) and layer 2 (L2) (e.g., RLC, MAC, physical (PHY) , etc. ) functionality and signaling, and may each be at least partially controlled by the CU 160. The DU 165 may support one or multiple different cells. IAB donor and IAB nodes 104 may communicate over an F1 interface according to some protocol that defines signaling messages (e.g., F1 AP protocol) . Additionally, CU 160 may communicate with the core network over an NG interface (which may be an example of a portion of backhaul link) , and may communicate with other CUs 160 (e.g., a CU 160 associated with an alternative IAB donor) over an Xn-C interface (which may be an example of a portion of a backhaul link) .
[0048] IAB nodes 104 may refer to a RAN node that provides IAB functionality (e.g., access for UEs 115, wireless self-backhauling capabilities, etc. ) . IAB nodes 104 may include a DU 165 and an MT. A DU 165 may act as a distributed scheduling node towards child nodes associated with the IAB node 104, and the MT may act as a scheduled node towards parent nodes associated with the IAB node 104. That is, an IAB donor may be referred to as a parent node in communication with one or more child nodes (e.g., an IAB donor may relay transmissions for UEs through one or more other IAB nodes 104) . Additionally, an IAB node 104 may also be referred to as a parent node or a child node to other IAB nodes 104, depending on the relay chain or configuration of the AN. Therefore, the MT entity of IAB nodes 104 (e.g., MTs) may provide a Uu interface for a child node to receive signaling from a parent IAB node 104, and the DU interface (e.g., DUs 165) may provide a Uu interface for a parent node to signal to a child IAB node 104 or UE 115.
[0049] For example, IAB node 104 may be referred to a parent node associated with IAB node, and a child node associated with IAB donor. The IAB donor may include a CU 160 with a wireline (e.g., optical fiber) or wireless connection to the core network and may act as parent node to IAB nodes 104. For example, the DU 165 of IAB donor may relay transmissions to UEs 115 through IAB nodes 104, and may directly signal transmissions to a UE 115. The CU 160 of IAB donor may signal communication link establishment via an F1 interface to IAB nodes 104, and the IAB nodes 104 may schedule transmissions (e.g., transmissions to the UEs 115 relayed from the IAB donor) through the DUs 165. That is, data may be relayed to and from IAB nodes 104 via signaling over an NR Uu interface to MT of the IAB node 104. Communications with IAB node 104 may be scheduled by DU 165 of IAB donor and communications with IAB node 104 may be scheduled by DU 165 of IAB node 104.
[0050] In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodes 104 or components of IAB nodes 104) may be configured to support techniques for large round trip times in random access channel procedures as described herein. For example, some operations described as being performed by a UE 115 or a base station 105 may additionally or alternatively be performed by components of the disaggregated RAN architecture (e.g., IAB nodes, DUs, CUs, etc. ) .
[0051] The split of functionality between a CU 160, a DU 165, and an RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170. For example, a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack. In some examples, the CU 160 may host upper protocol layer (e.g., layer 3 (L3) , layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or multiple different cells (e.g., via one or more RUs 170) . In some cases, a functional split between a CU 160 and a DU 165, or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170) . A CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU 160 may be connected to one or more DUs 165 via a midhaul communication link 162 (e.g., F1, F1-c, F1-u) , and a DU 165 may be connected to one or more RUs 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface) . In some examples, a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 105 that are in communication via such communication links.
[0052] In wireless communications systems (e.g., wireless communications system 100) , infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130) . In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as a donor entity or an IAB donor. One or more DUs 165 or one or more RUs 170 may be partially controlled by one or more CUs 160 associated with a donor network entity 105 (e.g., a donor base station 140) . The one or more donor network entities 105 (e.g., IAB donors) may be in communication with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120) . IAB nodes 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by DUs 165 of a coupled IAB donor. An IAB-MT may include an independent set of antennas for relay of communications with UEs 115, or may share the same antennas (e.g., of an RU 170) of an IAB node 104 used for access via the DU 165 of the IAB node 104 (e.g., referred to as virtual IAB-MT (vIAB-MT) ) . In some examples, the IAB nodes 104 may include DUs 165 that support communication links with additional entities (e.g., IAB nodes 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream) . In such cases, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodes 104 or components of IAB nodes 104) may be configured to operate according to the techniques described herein.
[0053] The electromagnetic spectrum is often subdivided, based on frequency / wavelength, into various classes, bands, channels, etc. In 5G NR two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) . It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
[0054] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz –24.25 GHz) . Frequency bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus may effectively extend features of FR1 and / or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4–1 (52.6 GHz –71 GHz) , FR4 (52.6 GHz –114.25 GHz) , and FR5 (114.25 GHz –300 GHz) . Each of these higher frequency bands falls within the EHF band.
[0055] With the above aspects in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4–1, and / or FR5, or may be within the EHF band.
[0056] For instance, an AN or RAN may include communications between access nodes (e.g., an IAB donor) , IAB nodes 104, and one or more UEs 115. The IAB donor may facilitate connection between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130) . That is, an IAB donor may refer to a RAN node with a wired or wireless connection to core network 130. The IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170) , in which case the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link) . IAB donor and IAB nodes 104 may communicate via an F1 interface according to a protocol that defines signaling messages (e.g., an F1 AP protocol) . Additionally, or alternatively, the CU 160 may communicate with the core network via an interface, which may be an example of a portion of backhaul link, and may communicate with other CUs 160 (e.g., a CU 160 associated with an alternative IAB donor) via an Xn-C interface, which may be an example of a portion of a backhaul link.
[0057] An IAB node 104 may refer to a RAN node that provides IAB functionality (e.g., access for UEs 115, wireless self-backhauling capabilities) . A DU 165 may act as a distributed scheduling node towards child nodes associated with the IAB node 104, and the IAB-MT may act as a scheduled node towards parent nodes associated with the IAB node 104. That is, an IAB donor may be referred to as a parent node in communication with one or more child nodes (e.g., an IAB donor may relay transmissions for UEs through one or more other IAB nodes 104) . Additionally, or alternatively, an IAB node 104 may also be referred to as a parent node or a child node to other IAB nodes 104, depending on the relay chain or configuration of the AN. Therefore, the IAB-MT entity of IAB nodes 104 may provide a Uu interface for a child IAB node 104 to receive signaling from a parent IAB node 104, and the DU interface (e.g., DUs 165) may provide a Uu interface for a parent IAB node 104 to signal to a child IAB node 104 or UE 115.
[0058] For example, IAB node 104 may be referred to as a parent node that supports communications for a child IAB node, or referred to as a child IAB node associated with an IAB donor, or both. The IAB donor may include a CU 160 with a wired or wireless connection (e.g., a backhaul communication link 120) to the core network 130 and may act as parent node to IAB nodes 104. For example, the DU 165 of IAB donor may relay transmissions to UEs 115 through IAB nodes 104, or may directly signal transmissions to a UE 115, or both. The CU 160 of IAB donor may signal communication link establishment via an F1 interface to IAB nodes 104, and the IAB nodes 104 may schedule transmissions (e.g., transmissions to the UEs 115 relayed from the IAB donor) through the DUs 165. That is, data may be relayed to and from IAB nodes 104 via signaling via an NR Uu interface to MT of the IAB node 104. Communications with IAB node 104 may be scheduled by a DU 165 of IAB donor and communications with IAB node 104 may be scheduled by DU 165 of IAB node 104.
[0059] In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support accessing unlicensed channels while accounting for metrics of extended reality devices as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., IAB nodes 104, DUs 165, CUs 160, RUs 170, RIC 175, SMO 180) .
[0060] A UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
[0061] The UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
[0062] The UEs 115 and the network entities 105 may wirelessly communicate with one another via one or more communication links 125 (e.g., an access link) using resources associated with one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication links 125. For example, a carrier used for a communication link 125 may include a portion of a RF spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) . Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105. For example, the terms “transmitting, ” “receiving, ” or “communicating, ” when referring to a network entity 105, may refer to any portion of a network entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105) .
[0063] In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute RF channel number (EARFCN) ) and may be identified according to a channel raster for discovery by the UEs 115. A carrier may be operated in a standalone mode, in which case initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode, in which case a connection is anchored using a different carrier (e.g., of the same or a different radio access technology) .
[0064] The communication links 125 shown in the wireless communications system 100 may include downlink transmissions (e.g., forward link transmissions) from a network entity 105 to a UE 115, uplink transmissions (e.g., return link transmissions) from a UE 115 to a network entity 105, or both, among other configurations of transmissions. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
[0065] A carrier may be associated with a particular bandwidth of the RF spectrum and, in some examples, the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100. For example, the carrier bandwidth may be one of a set of bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) . Devices of the wireless communications system 100 (e.g., the network entities 105, the UEs 115, or both) may have hardware configurations that support communications using a particular carrier bandwidth or may be configurable to support communications using one of a set of carrier bandwidths. In some examples, the wireless communications system 100 may include network entities 105 or UEs 115 that support concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured for operating using portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
[0066] Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) . In a system employing MCM techniques, a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) , such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication. A wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam) , and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.
[0067] One or more numerologies for a carrier may be supported, and a numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
[0068] The time intervals for the network entities 105 or the UEs 115 may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts=1 / (Δfmax·Nf) seconds, for which Δfmax may represent a supported subcarrier spacing, and Nf may represent a supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) . Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
[0069] Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots. Alternatively, each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing. Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . In some wireless communications systems 100, a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., Nf) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
[0070] A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) . In some examples, the TTI duration (e.g., a quantity of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
[0071] Physical channels may be multiplexed for communication using a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET) ) for a physical control channel may be defined by a set of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115. For example, one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
[0072] A network entity 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a network entity 105 (e.g., using a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) , or others) . In some examples, a cell also may refer to a coverage area 110 or a portion of a coverage area 110 (e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the network entity 105. For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with coverage areas 110, among other examples.
[0073] A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a lower-powered network entity 105 (e.g., a lower-powered base station 140) , as compared with a macro cell, and a small cell may operate using the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) . A network entity 105 may support one or multiple cells and may also support communications via the one or more cells using one or multiple component carriers.
[0074] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
[0075] In some examples, a network entity 105 (e.g., a base station 140, an RU 170) may be movable and therefore provide communication coverage for a moving coverage area 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, the overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.
[0076] The wireless communications system 100 may support synchronous or asynchronous operation. For synchronous operation, network entities 105 (e.g., base stations 140) may have similar frame timings, and transmissions from different network entities 105 may be approximately aligned in time. For asynchronous operation, network entities 105 may have different frame timings, and transmissions from different network entities 105 may, in some examples, not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.
[0077] The wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) . The UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.
[0078] In some examples, a UE 115 may be configured to support communicating directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., in accordance with a peer-to-peer (P2P) , D2D, or sidelink protocol) . In some examples, one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170) , which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105. In some examples, one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105. In some examples, groups of the UEs 115 communicating via D2D communications may support a one-to-many (1: M) system in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, a network entity 105 may facilitate the scheduling of resources for D2D communications. In some other examples, D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.
[0079] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services 150 for one or more network operators. The IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
[0080] The wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) . Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
[0081] The wireless communications system 100 may also operate using a super high frequency (SHF) region, which may be in the range of 3 GHz to 30 GHz, also known as the centimeter band, or using an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band. In some examples, the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the network entities 105 (e.g., base stations 140, RUs 170) , and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, such techniques may facilitate using antenna arrays within a device. The propagation of EHF transmissions, however, may be subject to even greater attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
[0082] The wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. While operating using unlicensed RF spectrum bands, devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA) . Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
[0083] A network entity 105 (e.g., a base station 140, an RU 170) or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a network entity 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations. A network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support RF beamforming for a signal transmitted via an antenna port.
[0084] The network entities 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords) . Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) , for which multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) , for which multiple spatial layers are transmitted to multiple devices.
[0085] Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
[0086] Some UEs 115 may be XR UEs 115 that support XR data communications, such as XR glasses, XR gloves, and the like. XR data may include virtual reality (VR) , augmented reality (AR) , or mixed reality (MR) data. In some examples, transmissions to an XR UE 115 may be downlink or sidelink transmissions from a companion device (e.g., another UE 115) , which may include video frame data transmissions for projection to a user of the XR UE 115. The XR UE 115 may receive a configuration indicating a configured grant (CG) for multi-physical uplink shared channel (PUSCH) transmissions (e.g., video frames with relatively large and / or variable sizes) . The CGs for the PUSCH transmissions may be configured to match traffic metrics and to avoid latency associated with dynamic grant (DG) configurations. In some examples, the configuration indicating the CG may indicate for the XR UE 115 to access an NR unlicensed (NR-U) channel (e.g., as a complement of licensed Uu interface) , which may improve a capacity for XR UEs 115 (e.g., due to increased channels used by the XR UEs 115) . The XR UEs 115 may experience a relatively smaller PDB than some other UEs 115 (e.g., less than 10 ms) , and may accordingly use some different traffic awareness and delay status reporting (DSR) procedures than the other UEs 115 (e.g., for NR-U or other channels) .
[0087] In some examples, an XR UE 115 may update an assigned CAPC or one or more channel access parameters associated with the CAPC for performing channel access of an unlicensed or shared spectrum channel (e.g., an NR-U channel) . For example, if the XR UE 115 has an RDB that is smaller than a threshold, the XR UE 115 may increase the CAPC (e.g., or the quantity of sensing slot durations or contention window size) to access the channel faster than with the assigned CAPC. In some examples, if the XR UE 115 is a multi-modal XR UE 115 (e.g., a UE 115 that shares a multi-modal service ID with one or more other XR UEs 115) , the multi-modal XR UEs 115 may share a joint CAPC. In some examples, different types of data flows (e.g., video data, tactile data) may have different priority indexes within a multi-modal service group. Accordingly, the multi-modal XR UEs 115 may communicate some types of flows first within a PDB (e.g., flows associated with a higher priority index) .
[0088] FIG. 2 shows an example of a network architecture 200 (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The network architecture 200 may illustrate an example for implementing one or more aspects of the wireless communications system 100. The network architecture 200 may include one or more CUs 160-a that may communicate directly with a core network 130-a via a backhaul communication link 120-a, or indirectly with the core network 130-a through one or more disaggregated network entities 105 (e.g., a Near-RT RIC 175-b via an E2 link, or a Non-RT RIC 175-a associated with an SMO 180-a (e.g., an SMO Framework) , or both) . A CU 160-a may communicate with one or more DUs 165-a via respective midhaul communication links 162-a (e.g., an F1 interface) . The DUs 165-amay communicate with one or more RUs 170-a via respective fronthaul communication links 168-a. The RUs 170-a may be associated with respective coverage areas 110-a and may communicate with UEs 115-a via one or more communication links 125-a. In some implementations, a UE 115-a may be simultaneously served by multiple RUs 170-a.
[0089] Each of the network entities 105 of the network architecture 200 (e.g., CUs 160-a, DUs 165-a, RUs 170-a, Non-RT RICs 175-a, Near-RT RICs 175-b, SMOs 180-a, Open Clouds (O-Clouds) 205, Open eNBs (O-eNBs) 210) may include one or more interfaces or may be coupled with one or more interfaces configured to receive or transmit signals (e.g., data, information) via a wired or wireless transmission medium. Each network entity 105, or an associated processor (e.g., controller) providing instructions to an interface of the network entity 105, may be configured to communicate with one or more of the other network entities 105 via the transmission medium. For example, the network entities 105 may include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other network entities 105. Additionally, or alternatively, the network entities 105 may include a wireless interface, which may include a receiver, a transmitter, or transceiver (e.g., an RF transceiver) configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other network entities 105.
[0090] In some examples, a CU 160-a may host one or more higher layer control functions. Such control functions may include RRC, PDCP, SDAP, or the like. Each control function may be implemented with an interface configured to communicate signals with other control functions hosted by the CU 160-a. A CU 160-a may be configured to handle user plane functionality (e.g., CU-UP) , control plane functionality (e.g., CU-CP) , or a combination thereof. In some examples, a CU 160-a may be logically split into one or more CU-UP units and one or more CU-CP units. A CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface, such as an E1 interface when implemented in an O-RAN configuration. A CU 160-a may be implemented to communicate with a DU 165-a, as necessary, for network control and signaling.
[0091] A DU 165-a may correspond to a logical unit that includes one or more functions (e.g., base station functions, RAN functions) to control the operation of one or more RUs 170-a. In some examples, a DU 165-a may host, at least partially, one or more of an RLC layer, a MAC layer, and one or more aspects of a PHY layer (e.g., a high PHY layer, such as modules for FEC encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3rd Generation Partnership Project (3GPP) . In some examples, a DU 165-a may further host one or more low PHY layers. Each layer may be implemented with an interface configured to communicate signals with other layers hosted by the DU 165-a, or with control functions hosted by a CU 160-a.
[0092] In some examples, lower-layer functionality may be implemented by one or more RUs 170-a. For example, an RU 170-a, controlled by a DU 165-a, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (e.g., performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower-layer functional split. In such an architecture, an RU 170-a may be implemented to handle over the air (OTA) communication with one or more UEs 115-a. In some implementations, real-time and non-real-time aspects of control and user plane communication with the RU (s) 170-a may be controlled by the corresponding DU 165-a. In some examples, such a configuration may enable a DU 165-a and a CU 160-a to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0093] The SMO 180-a may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network entities 105. For non-virtualized network entities 105, the SMO 180-a may be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (e.g., an O1 interface) . For virtualized network entities 105, the SMO 180-a may be configured to interact with a cloud computing platform (e.g., an O-Cloud 205) to perform network entity life cycle management (e.g., to instantiate virtualized network entities 105) via a cloud computing platform interface (e.g., an O2 interface) . Such virtualized network entities 105 can include, but are not limited to, CUs 160-a, DUs 165-a, RUs 170-a, and Near-RT RICs 175-b. In some implementations, the SMO 180-a may communicate with components configured in accordance with a 4G RAN (e.g., via an O1 interface) . Additionally, or alternatively, in some implementations, the SMO 180-a may communicate directly with one or more RUs 170-a via an O1 interface. The SMO 180-a also may include a Non-RT RIC 175-a configured to support functionality of the SMO 180-a.
[0094] The Non-RT RIC 175-a may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence (AI) or Machine Learning (ML) workflows including model training and updates, or policy-based guidance of applications / features in the Near-RT RIC 175-b. The Non-RT RIC 175-a may be coupled to or communicate with (e.g., via an A1 interface) the Near-RT RIC 175-b. The Near-RT RIC 175-b may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (e.g., via an E2 interface) connecting one or more CUs 160-a, one or more DUs 165-a, or both, as well as an O-eNB 210, with the Near-RT RIC 175-b.
[0095] In some examples, to generate AI / ML models to be deployed in the Near-RT RIC 175-b, the Non-RT RIC 175-a may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 175-b and may be received at the SMO 180-a or the Non-RT RIC 175-a from non- network data sources or from network functions. In some examples, the Non-RT RIC 175-a or the Near-RT RIC 175-b may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 175-a may monitor long-term trends and patterns for performance and employ AI or ML models to perform corrective actions through the SMO 180-a (e.g., reconfiguration via O1) or via generation of RAN management policies (e.g., A1 policies) .
[0096] FIG. 3 shows an example of a wireless communications system 300 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The wireless communications system 300 may implement or may be implemented by aspects of the wireless communications system 100 or the network architecture 200. For example, the wireless communications system 300 may include a UE 115 (e.g., a UE 115-a) and a network entity 105 (e.g., a network entity 105-a) , which may be examples of the corresponding devices as described with reference to FIG. 1. The wireless communications system may include one or more XR UEs 305 (e.g., an XR UE 305-a and an XR UE 305-b) , which may be examples of UEs 115 as described herein. For example, the XR UE 305-a and the XR UE 305-b may be examples of XR glasses, XR gloves, and the like.
[0097] In some examples of the wireless communications system 300, a network entity 105-a may communicate with one or more devices (e.g., a UE 115-a, an XR UE 305-a, and an XR UE 305-b) via an unlicensed channel. For example, the network entity 105-a may transmit downlink messages 320 to the XR UE 305-a, the XR UE 305-b, and the UE 115-a via a downlink channel 310-a, a downlink channel 310-b, and a downlink channel 310-c, respectfully. The network entity 105-a may receive uplink messages 325 from the XR UE 305-a, the XR UE 305-b, and the UE 115-a via an uplink channel 315-a, an uplink channel 315-b, and an uplink channel 315-c, respectfully. The downlink channels 310 and the uplink channels 315 may be examples of unlicensed or shared spectrum channels (e.g., NR-U channels) . For example, the uplink channels 315 may be part of a same NR-U resource pool.
[0098] In some examples, to gain access to the NR-U channel, the XR UE 305-a, the XR UE 305-b, and the UE 115-a may perform a channel access procedure. For example, the XR UE 305-a, the XR UE 305-b, and the UE 115-a may each receive control signaling 345 indicating a respective configuration of parameters for performing channel access (e.g., via channelAccessPriority-R16 in an RRC message) . The parameters may include, for example, a quantity mp of consecutive slots (e.g., sensing slot durations) during which the respective UE 115 may sense that the NR-U channel is idle, a minimum and maximum contention window length CWmin, p and CWmax, p (e.g., and a list of allowed contention window sizes) in slots, and a channel occupancy time (COT) duration Tm cot, p during which the respective UE 115 may occupy the NR-U channel. In some examples, the XR UE 305-a, the XR UE 305-b, and the UE 115-a may each receive the configuration including a table of CAPC 335 values and respective parameter values associated with each CAPC 335. As an illustrative example, the configured table may include the CAPC 335 and channel access parameter values listed in Table 1.
[0099] Table 1
[0100] Each UE 115 and XR UE 305 may receive control signaling 345 comprising an indication of a CAPC 335 of the table of configured CAPCs 335 to use for channel access (e.g., via a parameter channelAccess-CPext-CAPC in a downlink control information (DCI) message) . As an illustrative example, if the XR UE 305-a receives an indication (e.g., from the network entity 105-a via the downlink channel 310-a) that the XR UE 305-a has a CAPC 335 of 3, the XR UE 305-a may sense the NR-U channel (e.g., perform channel access procedure such as a listen-before-talk (LBT) procedure) for a sensing duration of 3 consecutive slots. If the XR UE 305-a detects that the NR-U channel is busy during the sensing duration, the XR UE 305-a may select (e.g., randomly select) a contention window of 15, 31, or 63 slots and may wait for the contention window to expire before sensing the NR-U channel again. If the XR UE 305-a detects that the NR-U channel is idle during the sensing duration, the XR UE 305-a may access the channel for 6 or 10 ms to communicate a data flow (e.g., transmit an uplink message 325-a or receive a downlink message 320) .
[0101] In some examples, however, the XR UE 305-a may have a relatively lower RDB 350 than some other UEs 115, and such LBT-based channel access may not account for such XR UE metrics. For example, the XR UE 305-a and the XR UE 305-b may both have a PDB 340 of 10 ms, but the XR UE 305-a may have an RDB 350 of 5 ms (e.g., the XR UE 305-a has consumed 5 ms of the PDB 340) and the XR UE 305-b may have an RDB 350 of 8 ms (e.g., the XR UE 305-b has consumed 2 ms of the PDB 340) . In such examples, to access the channel within the RDB 350 of 5 ms to communicate more urgent XR traffic, the XR UE 305-a may have a higher CAPC 335 than the XR UE 305-b. However, if the CAPC 335 of the XR UE 305-a is lower than the CAPC 335 of the XR UE 305-b, the more urgent XR traffic of the XR UE 305-amay not be communicated within the RDB.
[0102] In some examples, the XR UE 305-a and the XR UE 305-b may be multi-modal XR UEs 305. That is, the XR UE 305-a and the XR UE 305-b may belong to a same XR application (e.g., may be used in combination with one another by a user) and may share a multi-modal service ID. Accordingly, traffic (e.g., haptic, sensor, video, and audio data traffic) from the XR UE 305-a and the XR UE 305-b may belong to a same XR application. The XR UE 305-a and the XR UE 305-b may therefore be synchronized when accessing the NR-U channel (e.g., may access the NR-U channel at a same time to synchronously communicate data) . However, if the XR UE 305-a and the XR UE 305-b have different CAPCs 335 from one another, the XR UE 305-a and the XR UE 305-b may not synchronously communicate data.
[0103] In some aspects, the XR UE 305-a may perform channel access while accounting for XR UE metrics by determining a CAPC 335 based on an RDB 350 associated with the XR UE 305-a. For example, the XR UE 305-a may update an assigned CAPC 335 (e.g., assigned via DCI) based on an experienced uplink delay budget after transmitting a delay status report during a first COT indicating the RDB. For example, the XR UE 305-a may update the CAPC 335 based on one or more RDB thresholds 330. If an RDB 350 indicated in the delay status report is between an RDB threshold 330-a and the PDB of the XR UE 305-a, the XR UE 305-a may use a CAPC 335-a (e.g., the assigned CAPC 335) to determine parameters to access the NR-U channel. If the RDB 350 is below the RDB threshold 330-a but above an RDB threshold 330-b, the XR UE 305-a may use a CAPC 335-b (e.g., one priority level higher than the assigned CAPC 335) . For example, if the XR UE 305-a was assigned a CAPC 335 of 3, the XR UE 305-a may instead use a CAPC 335 of 2. If the RDB 350 is below the RDB threshold 330-b, the XR UE 305-a may use a CAPC 335-c (e.g., two priority levels higher than the assigned CAPC 335) . For example, if the XR UE 305-a was assigned a CAPC 335 of 3, the XR UE 305-a may instead use a CAPC 335 of 1. In some examples, the XR UE 305-a may receive a configuration of the one or more RDB thresholds 330 (e.g., via DCI, RRC, or medium access control-control element (MAC-CE) ) . In some examples, the one or more RDB thresholds 330 may be preconfigured at the XR UE 305-a.
[0104] In some aspects, the XR UE 305-a may indicate an application time of a new CAPC 335 (e.g., via MAC-CE or uplink control information (UCI) ) to avoid blind detection at the network entity 105-a. In some examples, the application time of the new CAPC 335 may be a next COT (e.g., following the COT during which the XR UE 305-atransmitted the delay status report) . In some examples, the application time of the new CAPC 335 may be a next COT after the network entity 105-a indicates that the MAC-CE, UCI, and / or the delay status report has been received. For example, the network entity 105-a may implicitly indicate that the MAC-CE has been received correctly by transmitting a DCI with a new data indicator (NDI) bit toggled.
[0105] Additionally, or alternatively, the XR UE 305-a may update one or more semi-static channel access parameters mp, CWmin, p, or CWmax, p (e.g., with or without updating the CAPC 335) to adapt to an experienced uplink delay budget. For example, the XR UE 305-a may increase the parameter mp by an amount X (e.g., a preconfigured amount) to account for additional sensing after sensing during a contention window is idle, or may decrease the parameter mp by an amount Y (e.g., a preconfigured amount) to allow for faster channel access. The XR UE 305-a may additionally, or alternatively, enhance or tune CWmin, p and / or CWmax, p for quick access to the NR-U channel for latency-stringent XR applications.
[0106] In some examples, the XR UE 305-a may determine to update the channel access parameters autonomously. In some examples, the XR UE 305-a may receive an indication of an update to the channel access parameters. For example, another device (e.g., an anchor device for a multi-modal group including the XR UE 305-a, one or more other devices in the multi-modal group, the network entity 105-a) may dynamically change one or more parameters of the preconfigured CAPC 335 to accommodate the RDB 350 of the XR UE 305-a (e.g., via a Uu interface, DCI signaling, RRC signaling, MAC-CE signaling, sidelink signaling, broadcast signaling, and so on) if the PDB is permitted. In some examples, the XR UE 305-a may be the anchor device. For example, the XR UE 305-a may dynamically change the one or more channel access parameters for the multi-modal group.
[0107] In some examples, one or more XR UEs 305 (e.g., the XR UE 305-a and the XR UE 305-b) may be multi-modal XR UEs 305 sharing a unique multi-modal service ID (e.g., may be treated as a group) . In such examples, the XR UE 305-a and the XR UE 305-b sharing the same multi-modal service ID may share a joint priority (JP) class to consider synchronization within the multi-modal group while accessing the NR-U channel. For example, if one device of the multi-modal service ID gains access to the NR-U channel, each device sharing the multi-modal service ID may also gain access to the NR-U channel by default (e.g., because each multi-modal device may operate for a same XR application) . In some examples, if there are several sets of multi-modal XR devices (e.g., with a first multi-modal service ID and a second multi-modal service ID) , there may be collisions between multi-modal service groups accessing the NR-U resource pool. Accordingly, the first multi-modal service ID may be associated with a first JP, and the second multi-modal service ID may be associated with a second JP to allow orderly access and resolve collisions between multiple sets of multi-modal devices accessing the NR-U resource pool.
[0108] In some aspects, the XR UE 305-a and the XR UE 305-b sharing a multi-modal service ID may be treated as a group. The XR UE 305-a and the XR UE 305-b may accordingly use a same configured joint CAPC 335 for accessing the NR-U channel by considering synchronization among devices in the multi-modal group. For example, the XR UE 305-a may receive a configuration indicating the joint CAPC 335 from the network entity 105-a (e.g., via a ChannelAccess-CPext-CAPC field in DCI or MAC-CE) . In some examples, if the XR UE 305-a is an anchor device (e.g., a high-capability device, a device associated with a relatively good channel state information (CSI) condition, a device with a relatively larger battery capacity) for the multi-modal group, the XR UE 305-a may receive a specific DCI or MAC-CE conveying the joint CAPC 335 to the XR UE 305-a. The XR UE 305-a may blind decode the DCI (e.g., or a physical downlink shared channel (PDSCH) associated with the DCI or MAC-CE) to obtain the joint CAPC 335. The XR UE 305-a may broadcast or groupcast the configured joint CAPC 335 to other devices in the multi-modal group (e.g., the XR UE 305-b) .
[0109] Additionally, or alternatively, the network entity 105-a may transmit a group-common DCI to deliver the joint CAPC 335 to each device in the multi-modal group (e.g., the XR UE 305-a and the XR UE 305-b) . In such examples, a group-common based radio network temporary identifier (RNTI) may be defined for the specific group of devices sharing the multi-modal service ID. Accordingly, both of the XR UE 305-a and the XR UE 305-b may conduct decoding of the group-common DCI to determine the configured joint CAPC 335.
[0110] In some examples, the XR UE 305-a and the XR UE 305-b sharing the same multi-modal service ID may each have multi-modal traffic in a respective buffer of the XR UE 305-a and the XR UE 305-b. Multi-modal traffic of the XR UE 305-a and the XR UE 305-b may be associated with different PDBs and reliabilities. The XR UE 305-a and the XR UE 305-b may know metrics of the multi-modal traffic and experienced delay for data packets in the respective buffers. Accordingly, the XR UE 305-a and the XR UE 305-b may determine priorities (e.g., priority indexes 355) associated with the multi-modal traffic to prioritize multiple data flows associated with a same multi-modal service ID.
[0111] For example, within a Tm cot, p associated with the multi-modal service ID (e.g., indicated in the CAPC table to be associated with the joint CAPC assigned to the multi-modal group) , the XR UE 305-a (e.g., and the XR UE 305-b) may determine priority indexes 355 for each data flow. That is, if the XR UE 305-a buffers a first data flow associated with a higher priority index 355-a and the XR UE 305-b buffers a second data flow associated with a lower priority index 355-b, the XR UE 305-a may transmit the first data flow first in the Tm cot, p (e.g., via the uplink message 325-a) and the XR UE 305-b may transmit the second data flow second in the Tm cot, p (e.g., via an uplink message 325-b) . In some examples, the XR UE 305-a may buffer and transmit both of the first data flow and the second data flow in accordance with the respective priority indexes 355.
[0112] In some examples, to determine the respective priority indexes, the XR UE 305-a and the XR UE 305-b may reuse a preconfigured table (e.g., a 5G quality-of-service identifier (5QI) table) . In some examples, the network entity 105-a may configure the XR UE 305-a and the XR UE 305-b with the respective priority indexes 355 for different kinds of XR data flows (e.g., video data, audio data, tactile data, and so on) via DCI or MAC-CE. In some examples, the XR UE 305-a and the XR UE 305-b may autonomously prioritize the different kinds of XR data flows within the multi-modal service ID within the Tm cot, p (e.g., based on metrics of each flow, such as PDB, RDB, reliability constraints, experienced delay, and so on) .
[0113] FIG. 4 shows an example of a process flow 400 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The process flow 400 may implement or may be implemented by aspects of the wireless communications system 100, the network architecture 200, or the wireless communications system 300. For example, the process flow 400 may include a UE 115 and a network entity 105 (e.g., a network entity 105-b) , which may be examples of the corresponding devices as described with reference to FIG. 1. The wireless communications system may include one or more XR UEs 401 (e.g., an XR UE 401-a and an XR UE 401-b) , which may be examples of UEs 115 as described herein.
[0114] In the following description of the process flow 400, the operation between the XR UE 401-a, the XR UE 401-b, and the network entity 105-b may be transmitted in a different order shown. Some operations may also be omitted from the process flow 400, and other operations may be added to the process flow 400. Further, although some operations or signaling may be shown to occur at different times for discussion purposes, these operations may occur at the same time.
[0115] At 405, the XR UE 401-a (e.g., and the XR UE 401-b) may receive, from the network entity 105-b, control signaling comprising an indication of a plurality of CAPCs. The one or more CAPCs may be associated with a channel access procedure of a shared channel (e.g., a shared spectrum channel, an unlicensed channel, an NR-U channel) . In some examples, the control signaling may indicate a table of CAPC values and associated channel access parameters (e.g., contention window sizes, channel sensing durations, maximum COTs) . The control signaling may be, for example, RRC, MAC-CE, or DCI signaling via a downlink channel (e.g., a licensed or unlicensed channel) .
[0116] At 410, the XR UE 401-a (e.g., and the XR UE 401-b) may receive, from the network entity 105-b, a first control message (e.g., a DCI or MAC-CE message) indicating that the XR UE 401-a is assigned a first CAPC of the plurality of CAPCs. In some examples, if the XR UE 401-a and the XR UE 401-b are multi-modal devices sharing a same multi-modal service ID, the network entity 105-b may transmit the first control message via a group common DCI to both of the XR UE 401-a and the XR UE 401-b. In some examples, if the XR UE 401-a is an anchor device for a multi-modal service group, the network entity 105-b may transmit the first control message via a specific DCI or MAC-CE message to the XR UE 401-a.
[0117] In some examples, the first control message may comprise an indication of the group ID (e.g., the multi-modal service ID) , and may indicate to apply the first CAPC when performing the channel access procedure. In some examples, the first control message may indicate for the XR UE 401-a to apply a first priority index and a second priority index for a first data flow and a second data flow, respectively, of the multi-modal service ID.
[0118] In some examples, at 415, the XR UE 401-a may receive second control signaling from the network entity 105-b (e.g., via DCI, RRC, or MAC-CE) indicating a plurality of RDB thresholds associated with multiple CAPCs of the plurality of CAPCs. In some examples, the XR UE 401-a may determine to use the first CAPC or a second CAPC of the plurality of CAPCs for the channel access procedure based on an RDB of the XR UE 401-a corresponding to a first RDB threshold of the plurality of RDB thresholds.
[0119] In some examples, at 420, the XR UE 401-a may transmit a second control message to the XR UE 401-b indicating for the XR UE 401-b to apply the first CAPC or the second CAPC of the plurality of CAPCs. For example, if the XR UE 401-a and the XR UE 401-b share a multi-modal service ID and the XR UE 401-a receives the specific DCI or MAC-CE message indicating the first CAPC, the XR UE 401-a may transmit the second control message via broadcast or groupcast to the XR UE 401-a.
[0120] In some examples, at 425, the XR UE 401-a may receive a control message from the network entity 105-b (e.g., RRC, MAC-CE, DCI) indicating one or more second channel access procedure parameters. The control message may indicate to apply the one or more second channel access parameters when performing the channel access procedure. The one or more second channel access parameters may include a quantity of sensing slot durations, contention window sizes, COT durations, and so on.
[0121] In some examples, at 430, the XR UE 401-a may transmit, to the network entity 105-b, a control message (e.g., UCI, MAC-CE) indicating an application time at which the XR UE 401-b may the second CAPC for the channel access procedure instead of the first CAPC. The application time may be, for example, during a first COT after a COT during which the XR UE 401-a transmits a delay status report or the control message.
[0122] At 435, the XR UE 401-a (e.g., and the XR UE 401-b) may perform a channel access procedure to gain access to the shared channel for communicating first data. The XR UE 401-a may perform the channel access procedure using one or more parameters associated with the first CAPC or the second CAPC. In some examples, the XR UE 401-a may perform the channel access procedure using the one or more second parameters indicated by the network entity 105-b, or one or more second parameters determined by the XR UE 401-a (e.g., autonomously) . The first data may be associated with a PDB and an RDB. For example, the second parameters or the second CAPC may be corresponding to the RDB. In some examples, if the XR UE 401-a and the XR UE 401-b share a multi-modal service ID, the XR UE 401-a and the XR UE 401-b may access the shared channel together (e.g., with a same CAPC) .
[0123] In some examples, at 440, the XR UE 401-a (e.g., and the XR UE 401-b) may communicate a first data flow (e.g., comprising the first data) and a second data flow after accessing the shared channel. For example, the XR UE 401-a may communicate (e.g., transmit or receive) the first data flow in accordance with the first data flow being associated with a higher priority index than the second data flow. The XR UE 401-a or the XR UE 401-b may communicate (e.g., transmit or receive) the second data flow after the first data flow in accordance with the second data flow being associated with a lower priority index.
[0124] FIG. 5 shows a block diagram 500 of a device 505 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The device 505 may be an example of aspects of a UE 115 as described herein. The device 505 may include a receiver 510, a transmitter 515, and a communications manager 520. The device 505, or one or more components of the device 505 (e.g., the receiver 510, the transmitter 515, and the communications manager 520) , may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0125] The receiver 510 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to accessing unlicensed channels while accounting for metrics of extended reality devices) . Information may be passed on to other components of the device 505. The receiver 510 may utilize a single antenna or a set of multiple antennas.
[0126] The transmitter 515 may provide a means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to accessing unlicensed channels while accounting for metrics of extended reality devices) . In some examples, the transmitter 515 may be co-located with a receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or a set of multiple antennas.
[0127] The communications manager 520, the receiver 510, the transmitter 515, or various combinations thereof or various components thereof may be examples of means for performing various aspects of accessing unlicensed channels while accounting for metrics of XR devices as described herein. For example, the communications manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
[0128] In some examples, the communications manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be an example of means for performing various aspects of accessing unlicensed channels for XR devices. The communications manager 520 may be implemented in hardware (e.g., in communications management circuitry) . The circuitry may include at least one of a processor, a digital signal processor (DSP) , a central processing unit (CPU) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure. In some examples, at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
[0129] Additionally, or alternatively, the communications manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor, or any combination thereof. If implemented in code executed by at least one processor, the functions of the communications manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
[0130] In some examples, the communications manager 520 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting, determining) using or otherwise in cooperation with the receiver 510, the transmitter 515, or both. For example, the communications manager 520 may receive information from the receiver 510, send information to the transmitter 515, or be integrated in combination with the receiver 510, the transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.
[0131] The communications manager 520 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 520 is capable of, configured to, or operable to support a means for receiving control signaling indicating a set of multiple channel access priority classes associated with a channel access procedure for a shared channel. The communications manager 520 is capable of, configured to, or operable to support a means for receiving a first control message indicating that the first UE is assigned a first channel access priority class of the set of multiple channel access priority classes. The communications manager 520 is capable of, configured to, or operable to support a means for performing, in accordance with a second channel access priority class of the set of multiple channel access priority classes, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget.
[0132] By including or configuring the communications manager 520 in accordance with examples as described herein, the device 505 (e.g., at least one processor controlling or otherwise coupled with the receiver 510, the transmitter 515, the communications manager 520, or a combination thereof) may support techniques for accessing unlicensed channels for XR devices in accordance with XR device metrics, which may allow for more efficient utilization of communication resources.
[0133] FIG. 6 shows a block diagram 600 of a device 605 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The device 605 may be an example of aspects of a device 505 or a UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communications manager 620. The device 605, or one or more components of the device 605 (e.g., the receiver 610, the transmitter 615, and the communications manager 620) , may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0134] The receiver 610 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to accessing unlicensed channels while accounting for metrics of extended reality devices) . Information may be passed on to other components of the device 605. The receiver 610 may utilize a single antenna or a set of multiple antennas.
[0135] The transmitter 615 may provide a means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to accessing unlicensed channels while accounting for metrics of extended reality devices) . In some examples, the transmitter 615 may be co-located with a receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a set of multiple antennas.
[0136] The device 605, or various components thereof, may be an example of means for performing various aspects of accessing unlicensed channels while accounting for metrics of extended reality devices as described herein. For example, the communications manager 620 may include a CAPC manager 625 a channel access procedure manager 630, or any combination thereof. The communications manager 620 may be an example of aspects of a communications manager 520 as described herein. In some examples, the communications manager 620, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 610, the transmitter 615, or both. For example, the communications manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated in combination with the receiver 610, the transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.
[0137] The communications manager 620 may support wireless communications in accordance with examples as disclosed herein. The CAPC manager 625 is capable of, configured to, or operable to support a means for receiving control signaling indicating a set of multiple channel access priority classes associated with a channel access procedure for a shared channel. The CAPC manager 625 is capable of, configured to, or operable to support a means for receiving a first control message indicating that the first UE is assigned a first channel access priority class of the set of multiple channel access priority classes. The channel access procedure manager 630 is capable of, configured to, or operable to support a means for performing, in accordance with a second channel access priority class of the set of multiple channel access priority classes, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget.
[0138] FIG. 7 shows a block diagram 700 of a communications manager 720 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The communications manager 720 may be an example of aspects of a communications manager 520, a communications manager 620, or both, as described herein. The communications manager 720, or various components thereof, may be an example of means for performing various aspects of accessing unlicensed channels while accounting for metrics of extended reality devices as described herein. For example, the communications manager 720 may include a CAPC manager 725, a channel access procedure manager 730, an RDB threshold manager 735, a data flow manager 740, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories) , may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
[0139] The communications manager 720 may support wireless communications in accordance with examples as disclosed herein. The CAPC manager 725 is capable of, configured to, or operable to support a means for receiving control signaling indicating a set of multiple channel access priority classes associated with a channel access procedure for a shared channel. In some examples, the CAPC manager 725 is capable of, configured to, or operable to support a means for receiving a first control message indicating that the first UE is assigned a first channel access priority class of the set of multiple channel access priority classes. The channel access procedure manager 730 is capable of, configured to, or operable to support a means for performing, in accordance with a second channel access priority class of the set of multiple channel access priority classes, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget.
[0140] In some examples, the RDB threshold manager 735 is capable of, configured to, or operable to support a means for receiving control signaling indicating a set of multiple thresholds associated with multiple channel access priority classes of the set of multiple channel access priority classes, the remainder of the packet delay budget satisfying a first threshold of the set of multiple thresholds, and the second channel access priority class corresponding to the first threshold.
[0141] In some examples, performing the channel access procedure in accordance with one or more second channel access procedure parameters, the one or more second channel access procedure parameters different from one or more first channel access procedure parameters associated with the first channel access priority class.
[0142] In some examples, the channel access procedure manager 730 is capable of, configured to, or operable to support a means for receiving, from a network entity, a second control message indicating the one or more second channel access procedure parameters and indicating to apply the one or more second channel access procedure parameters when performing the channel access procedure.
[0143] In some examples, the CAPC manager 725 is capable of, configured to, or operable to support a means for transmitting, to a network entity, a second control message indicating an application time for which the UE is applying the second channel access priority class for the channel access procedure instead of the first channel access priority class.
[0144] In some examples, the CAPC manager 725 is capable of, configured to, or operable to support a means for transmitting, to a second UE, a second control message indicating to apply the first channel access priority class or the second channel access priority class, where the first UE and the second UE are associated with a same multi-modal service identifier.
[0145] In some examples, the CAPC manager 725 is capable of, configured to, or operable to support a means for receiving the first control message including a group identifier associated with a multi-modal service, the first control message indicating to apply the first channel access priority class when performing the channel access procedure.
[0146] In some examples, the data flow manager 740 is capable of, configured to, or operable to support a means for receiving the first control message that indicates a first priority index for a first data flow and to apply a second priority index a second data flow of a multi-modal service. In some examples, the data flow manager 740 is capable of, configured to, or operable to support a means for communicating the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.
[0147] In some examples, a first data flow of a multi-modal service is associated with a first priority index and a second data flow of the multi-modal service being associated with a second priority index, and the data flow manager 740 is capable of, configured to, or operable to support a means for communicating the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.
[0148] FIG. 8 shows a diagram of a system 800 including a device 805 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The device 805 may be an example of or include the components of a device 505, a device 605, or a UE 115 as described herein. The device 805 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 805 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 820, an input / output (I / O) controller 810, a transceiver 815, an antenna 825, at least one memory 830, code 835, and at least one processor 840. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 845) .
[0149] The I / O controller 810 may manage input and output signals for the device 805. The I / O controller 810 may also manage peripherals not integrated into the device 805. In some cases, the I / O controller 810 may represent a physical connection or port to an external peripheral. In some cases, the I / O controller 810 may utilize an operating system such as or another known operating system. Additionally, or alternatively, the I / O controller 810 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I / O controller 810 may be implemented as part of one or more processors, such as the at least one processor 840. In some cases, a user may interact with the device 805 via the I / O controller 810 or via hardware components controlled by the I / O controller 810.
[0150] In some cases, the device 805 may include a single antenna 825. However, in some other cases, the device 805 may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 815 may communicate bi-directionally, via the one or more antennas 825, wired, or wireless links as described herein. For example, the transceiver 815 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 815 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 825 for transmission, and to demodulate packets received from the one or more antennas 825. The transceiver 815, or the transceiver 815 and one or more antennas 825, may be an example of a transmitter 515, a transmitter 615, a receiver 510, a receiver 610, or any combination thereof or component thereof, as described herein.
[0151] The at least one memory 830 may include random access memory (RAM) and read-only memory (ROM) . The at least one memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed by the at least one processor 840, cause the device 805 to perform various functions described herein. The code 835 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 835 may not be directly executable by the at least one processor 840 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the at least one memory 830 may contain, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0152] The at least one processor 840 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some cases, the at least one processor 840 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the at least one processor 840. The at least one processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., the at least one memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks supporting accessing unlicensed channels while accounting for metrics of extended reality devices) . For example, the device 805 or a component of the device 805 may include at least one processor 840 and at least one memory 830 coupled with or to the at least one processor 840, the at least one processor 840 and at least one memory 830 configured to perform various functions described herein. In some examples, the at least one processor 840 may include multiple processors and the at least one memory 830 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein. In some examples, the at least one processor 840 may be a component of a processing system, which may refer to a system (such as a series) of machines, circuitry (including, for example, one or both of processor circuitry (which may include the at least one processor 840) and memory circuitry (which may include the at least one memory 830) ) , or components, that receives or obtains inputs and processes the inputs to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, the at least one processor 840 or a processing system including the at least one processor 840 may be configured to, configurable to, or operable to cause the device 805 to perform one or more of the functions described herein. Further, as described herein, being “configured to, ” being “configurable to, ” and being “operable to” may be used interchangeably and may be associated with a capability, when executing code stored in the at least one memory 830 or otherwise, to perform one or more of the functions described herein.
[0153] The communications manager 820 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 820 is capable of, configured to, or operable to support a means for receiving control signaling indicating a set of multiple channel access priority classes associated with a channel access procedure for a shared channel. The communications manager 820 is capable of, configured to, or operable to support a means for receiving a first control message indicating that the first UE is assigned a first channel access priority class of the set of multiple channel access priority classes. The communications manager 820 is capable of, configured to, or operable to support a means for performing, in accordance with a second channel access priority class of the set of multiple channel access priority classes, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget.
[0154] By including or configuring the communications manager 820 in accordance with examples as described herein, the device 805 may support techniques for accessing unlicensed channels for XR devices in accordance with XR device metrics, which may allow for improved communication reliability, reduced latency, more efficient utilization of communication resources, and improved coordination between devices.
[0155] In some examples, the communications manager 820 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 815, the one or more antennas 825, or any combination thereof. Although the communications manager 820 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 820 may be supported by or performed by the at least one processor 840, the at least one memory 830, the code 835, or any combination thereof. For example, the code 835 may include instructions executable by the at least one processor 840 to cause the device 805 to perform various aspects of accessing unlicensed channels while accounting for metrics of extended reality devices as described herein, or the at least one processor 840 and the at least one memory 830 may be otherwise configured to, individually or collectively, perform or support such operations.
[0156] FIG. 9 shows a flowchart illustrating a method 900 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The operations of the method 900 may be implemented by a UE or its components as described herein. For example, the operations of the method 900 may be performed by a UE 115 as described with reference to FIGs. 1 through 8. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0157] At 905, the method may include receiving control signaling indicating a set of multiple channel access priority classes associated with a channel access procedure for a shared channel. The operations of 905 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 905 may be performed by a CAPC manager 725 as described with reference to FIG. 7.
[0158] At 910, the method may include receiving a first control message indicating that the first UE is assigned a first channel access priority class of the set of multiple channel access priority classes. The operations of 910 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 910 may be performed by a CAPC manager 725 as described with reference to FIG. 7.
[0159] At 915, the method may include performing, in accordance with a second channel access priority class of the set of multiple channel access priority classes, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget. The operations of 915 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 915 may be performed by a channel access procedure manager 730 as described with reference to FIG. 7.
[0160] FIG. 10 shows a flowchart illustrating a method 1000 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The operations of the method 1000 may be implemented by a UE or its components as described herein. For example, the operations of the method 1000 may be performed by a UE 115 as described with reference to FIGs. 1 through 8. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0161] At 1005, the method may include receiving control signaling indicating a set of multiple channel access priority classes associated with a channel access procedure for a shared channel. The operations of 1005 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1005 may be performed by a CAPC manager 725 as described with reference to FIG. 7.
[0162] At 1010, the method may include receiving a first control message indicating that the first UE is assigned a first channel access priority class of the set of multiple channel access priority classes. The operations of 1010 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1010 may be performed by a CAPC manager 725 as described with reference to FIG. 7.
[0163] At 1015, the method may include performing, in accordance with a second channel access priority class of the set of multiple channel access priority classes, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget. The operations of 1015 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1015 may be performed by a channel access procedure manager 730 as described with reference to FIG. 7.
[0164] At 1020, the method may include receiving control signaling indicating a set of multiple thresholds associated with multiple channel access priority classes of the set of multiple channel access priority classes, the remainder of the packet delay budget satisfying a first threshold of the set of multiple thresholds, and the second channel access priority class corresponding to the first threshold. The operations of 1020 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1020 may be performed by an RDB threshold manager 735 as described with reference to FIG. 7.
[0165] FIG. 11 shows a flowchart illustrating a method 1100 that supports accessing unlicensed channels while accounting for metrics of extended reality devices in accordance with one or more aspects of the present disclosure. The operations of the method 1100 may be implemented by a UE or its components as described herein. For example, the operations of the method 1100 may be performed by a UE 115 as described with reference to FIGs. 1 through 8. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0166] At 1105, the method may include receiving control signaling indicating a set of multiple channel access priority classes associated with a channel access procedure for a shared channel. The operations of 1105 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1105 may be performed by a CAPC manager 725 as described with reference to FIG. 7.
[0167] At 1110, the method may include receiving a first control message indicating that the first UE is assigned a first channel access priority class of the set of multiple channel access priority classes. The operations of 1110 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1110 may be performed by a CAPC manager 725 as described with reference to FIG. 7.
[0168] At 1115, the method may include performing, in accordance with a second channel access priority class of the set of multiple channel access priority classes, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget. The operations of 1115 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1115 may be performed by a channel access procedure manager 730 as described with reference to FIG. 7.
[0169] At 1120, the method may include performing the channel access procedure in accordance with one or more second channel access procedure parameters, the one or more second channel access procedure parameters different from one or more first channel access procedure parameters associated with the first channel access priority class. The operations of 1120 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1120 may be performed by a channel access procedure manager 730 as described with reference to FIG. 7.
[0170] The following provides an overview of aspects of the present disclosure:
[0171] Aspect 1: An apparatus for wireless communications at a first UE, comprising one or more memories and one or more processors coupled with the one or more memories and configured to cause the first UE to receive control signaling indicating a plurality of CAPCs associated with a channel access procedure for a shared channel; receive a first control message indicating that the first UE is assigned a first CAPC of the plurality of CAPCs; and perform, in accordance with a second CAPC of the plurality of CAPCs, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a PDB for communication of the first data and the second CAPC corresponding to a remainder of the PDB.
[0172] Aspect 2: The apparatus of aspect 10, wherein the one or more processors are further configured to cause the first UE to receive second control signaling indicating a plurality of thresholds associated with multiple CAPCs of the plurality of CAPCs, the remainder of the PDB satisfying a first threshold of the plurality of thresholds, and the second CAPC corresponding to the first threshold.
[0173] Aspect 3: The apparatus of any of aspects 10 through 11, wherein the second CAPC is a same CAPC as the first CAPC, the performing the channel access procedure comprising performing the channel access procedure in accordance with one or more second channel access procedure parameters, the one or more second channel access procedure parameters different from one or more first channel access procedure parameters associated with the first CAPC.
[0174] Aspect 4: The apparatus of aspect 12, wherein the one or more processors are further configured to cause the first UE to receive, from a network entity, a second control message indicating the one or more second channel access procedure parameters and indicating to apply the one or more second channel access procedure parameters when performing the channel access procedure.
[0175] Aspect 5: The apparatus of any of aspects 10 through 13, wherein the one or more processors are further configured to cause the first UE to: transmit, to a network entity, a second control message indicating an application time for which the UE is applying the second CAPC for the channel access procedure instead of the first CAPC.
[0176] Aspect 6: The apparatus of any of aspects 10 through 14, wherein the one or more processors are further configured to cause the first UE to transmit, to a second UE, a second control message indicating to apply the first CAPC or the second CAPC, wherein the first UE and the second UE are associated with a same multi-modal service ID.
[0177] Aspect 7: The apparatus of any of aspects 10 through 15, wherein the one or more processors are further configured to cause the first UE to receive the first control message comprising a group ID associated with a multi-modal service, the first control message indicating to apply the first CAPC when performing the channel access procedure.
[0178] Aspect 8: The apparatus of any of aspects 10 through 16, wherein the one or more processors are further configured to cause the first UE to receive the first control message that indicates a first priority index for a first data flow and to apply a second priority index a second data flow of a multi-modal service; and communicate the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.
[0179] Aspect 9: The apparatus of any of aspects 10 through 17, wherein a first data flow of a multi-modal service is associated with a first priority index and a second data flow of the multi-modal service being associated with a second priority index, the method further comprising: communicating the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.
[0180] Aspect 10: A method for wireless communications at a first UE, comprising: receiving control signaling indicating a plurality of CAPCs associated with a channel access procedure for a shared channel; receiving a first control message indicating that the first UE is assigned a first CAPC of the plurality of CAPCs; and performing, in accordance with a second CAPC of the plurality of CAPCs, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a PDB for communication of the first data and the second CAPC corresponding to a remainder of the PDB.
[0181] Aspect 11: The method of aspect 10, further comprising: receiving second control signaling indicating a plurality of thresholds associated with multiple CAPCs of the plurality of CAPCs, the remainder of the PDB satisfying a first threshold of the plurality of thresholds, and the second CAPC corresponding to the first threshold.
[0182] Aspect 12: The method of any of aspects 10 through 11, wherein the second CAPC is a same CAPC as the first CAPC, the performing the channel access procedure comprising performing the channel access procedure in accordance with one or more second channel access procedure parameters, the one or more second channel access procedure parameters different from one or more first channel access procedure parameters associated with the first CAPC.
[0183] Aspect 13: The method of aspect 12, further comprising: receiving, from a network entity, a second control message indicating the one or more second channel access procedure parameters and indicating to apply the one or more second channel access procedure parameters when performing the channel access procedure.
[0184] Aspect 14: The method of any of aspects 10 through 13, further comprising: transmitting, to a network entity, a second control message indicating an application time for which the UE is applying the second CAPC for the channel access procedure instead of the first CAPC.
[0185] Aspect 15: The method of any of aspects 10 through 14, further comprising: transmitting, to a second UE, a second control message indicating to apply the first CAPC or the second CAPC, wherein the first UE and the second UE are associated with a same multi-modal service ID.
[0186] Aspect 16: The method of any of aspects 10 through 15, further comprising: receiving the first control message comprising a group ID associated with a multi-modal service, the first control message indicating to apply the first CAPC when performing the channel access procedure.
[0187] Aspect 17: The method of any of aspects 10 through 16, further comprising: receiving the first control message that indicates a first priority index for a first data flow and to apply a second priority index a second data flow of a multi-modal service; and communicating the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.
[0188] Aspect 18: The method of any of aspects 10 through 17, wherein a first data flow of a multi-modal service is associated with a first priority index and a second data flow of the multi-modal service being associated with a second priority index, the method further comprising: communicating the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.
[0189] Aspect 19: A first UE for wireless communications, comprising at least one means for performing a method of any of aspects 10 through 18.
[0190] Aspect 20: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to cause a first UE to perform a method of any of aspects 10 through 18.
[0191] Aspect 21: A first UE, comprising: a processing system that includes processor circuity and memory circuitry that stores code and is coupled with the processor circuitry, the processing system configured to cause the first UE to perform a method of any of aspects 10 through 18.
[0192] It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0193] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
[0194] Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0195] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) . Any functions or operations described herein as being capable of being performed by a processor may be performed by multiple processors that, individually or collectively, are capable of performing the described functions or operations.
[0196] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0197] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media. Any functions or operations described herein as being capable of being performed by a memory may be performed by multiple memories that, individually or collectively, are capable of performing the described functions or operations.
[0198] As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. ”
[0199] As used herein, including in the claims, the article “a” before a noun is open-ended and understood to refer to “at least one” of those nouns or “one or more” of those nouns. Thus, the terms “a, ” “at least one, ” “one or more, ” “at least one of one or more” may be interchangeable. For example, if a claim recites “a component” that performs one or more functions, each of the individual functions may be performed by a single component or by any combination of multiple components. Thus, the term “acomponent” having characteristics or performing functions may refer to “at least one of one or more components” having a particular characteristic or performing a particular function. Subsequent reference to a component introduced with the article “a” using the terms “the” or “said” may refer to any or all of the one or more components. For example, a component introduced with the article “a” may be understood to mean “one or more components, ” and referring to “the component” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ” Similarly, subsequent reference to a component introduced as “one or more components” using the terms “the” or “said” may refer to any or all of the one or more components. For example, referring to “the one or more components” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ”
[0200] The term “determine” or “determining” encompasses a 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) , ascertaining and the like. Also, “determining” can include receiving (e.g., receiving information) , accessing (e.g., accessing data stored in memory) and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.
[0201] In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.
[0202] The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration, ” and not “preferred” or “advantageous over other examples. ” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.
[0203] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.An apparatus for wireless communications at a first user equipment (UE) , comprising:one or more memories; andone or more processors coupled with the one or more memories and configured to cause the first UE to:receive control signaling comprising an indication of a plurality of channel access priority classes associated with a channel access procedure for a shared channel;receive a first control message comprising an indication that the first UE is assigned a first channel access priority class of the plurality of channel access priority classes; andperform, in accordance with a second channel access priority class of the plurality of channel access priority classes, the channel access procedure to attempt to gain access to the shared channel to communicate first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget.2.The apparatus of claim 1, wherein the one or more processors are further configured to cause the first UE to:receive second control signaling indicating a plurality of thresholds associated with multiple channel access priority classes of the plurality of channel access priority classes, wherein the remainder of the packet delay budget satisfies a first threshold of the plurality of thresholds, and the second channel access priority class corresponding to the first threshold.3.The apparatus of claim 1, the second channel access priority class being a same channel access priority class as the first channel access priority class, wherein, to perform the channel access procedure, the one or more processors are further configured to cause the first UE to:perform the channel access procedure in accordance with one or more second channel access procedure parameters, the one or more second channel access procedure parameters different from one or more first channel access procedure parameters associated with the first channel access priority class.4.The apparatus of claim 3, wherein the one or more processors are further configured to cause the first UE to:receive, from a network entity, a second control message comprising an indication of the one or more second channel access procedure parameters and comprising an indication to apply the one or more second channel access procedure parameters to perform the channel access procedure.5.The apparatus of claim 1, wherein the one or more processors are further configured to cause the first UE to:transmit, to a network entity, a second control message comprising an indication of an application time for which the UE is to apply the second channel access priority class for the channel access procedure instead of the first channel access priority class.6.The apparatus of claim 1, wherein the one or more processors are further configured to cause the first UE to:transmit, to a second UE, a second control message comprising an indication to apply the first channel access priority class or the second channel access priority class, wherein the first UE and the second UE are associated with a same multi-modal service identifier.7.The apparatus of claim 1, wherein the one or more processors are further configured to cause the first UE to:receive the first control message comprising a group identifier associated with a multi-modal service, the first control message comprising an indication to apply the first channel access priority class to perform the channel access procedure.8.The apparatus of claim 1, wherein the one or more processors are further configured to cause the first UE to:receive the first control message that indicates a first priority index for a first data flow and to apply a second priority index a second data flow of a multi-modal service; andcommunicate the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.9.The apparatus of claim 1, a first data flow of a multi-modal service being associated with a first priority index and a second data flow of the multi-modal service being associated with a second priority index, wherein the one or more processors are configured to cause the first UE to:communicate the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.10.A method for wireless communications at a first user equipment (UE) , comprising:receiving control signaling indicating a plurality of channel access priority classes associated with a channel access procedure for a shared channel;receiving a first control message indicating that the first UE is assigned a first channel access priority class of the plurality of channel access priority classes; andperforming, in accordance with a second channel access priority class of the plurality of channel access priority classes, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget.11.The method of claim 10, further comprising:receiving second control signaling indicating a plurality of thresholds associated with multiple channel access priority classes of the plurality of channel access priority classes, the remainder of the packet delay budget satisfying a first threshold of the plurality of thresholds, and the second channel access priority class corresponding to the first threshold.12.The method of claim 10, the second channel access priority class being a same channel access priority class as the first channel access priority class, the performing the channel access procedure comprising:performing the channel access procedure in accordance with one or more second channel access procedure parameters, the one or more second channel access procedure parameters different from one or more first channel access procedure parameters associated with the first channel access priority class.13.The method of claim 12, further comprising:receiving, from a network entity, a second control message indicating the one or more second channel access procedure parameters and indicating to apply the one or more second channel access procedure parameters when performing the channel access procedure.14.The method of claim 10, further comprising:transmitting, to a network entity, a second control message indicating an application time for which the UE is applying the second channel access priority class for the channel access procedure instead of the first channel access priority class.15.The method of claim 10, further comprising:transmitting, to a second UE, a second control message indicating to apply the first channel access priority class or the second channel access priority class, wherein the first UE and the second UE are associated with a same multi-modal service identifier.16.The method of claim 10, further comprising:receiving the first control message comprising a group identifier associated with a multi-modal service, the first control message indicating to apply the first channel access priority class when performing the channel access procedure.17.The method of claim 10, further comprising:receiving the first control message that indicates a first priority index for a first data flow and to apply a second priority index a second data flow of a multi-modal service; andcommunicating the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.18.The method of claim 10, a first data flow of a multi-modal service being associated with a first priority index and a second data flow of the multi-modal service being associated with a second priority index, the method further comprising:communicating the first data flow and the second data flow in accordance with the first priority index and the second priority index, the first data being associated with the first data flow.19.A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to cause a first user equipment (UE) to:receive control signaling indicating a plurality of channel access priority classes associated with a channel access procedure for a shared channel;receive a first control message indicating that the first UE is assigned a first channel access priority class of the plurality of channel access priority classes; andperform, in accordance with a second channel access priority class of the plurality of channel access priority classes, the channel access procedure for attempting to gain access to the shared channel for communicating first data, the first data associated with a packet delay budget for communication of the first data and the second channel access priority class corresponding to a remainder of the packet delay budget.20.The non-transitory computer-readable medium of claim 19, wherein the instructions are further executable by the one or more processors to cause the first UE to:receive second control signaling indicating a plurality of thresholds associated with multiple channel access priority classes of the plurality of channel access priority classes, the remainder of the packet delay budget satisfying a first threshold of the plurality of thresholds, and the second channel access priority class corresponding to the first threshold.
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