Techniques for configuring sidelink data radio bearers for relay communications

Abstract

Methods, systems, and devices for wireless communication are described. A first user equipment (UE) may establish a first communication link with a second UE, where the second UE may operate or function as a relay for communicating between the first UE and a third UE over an end-to-end communication link. Further, the method may include the first UE transmitting a first message to the second UE, the first message indicating traffic information and a set of Quality of Service (QoS) profiles associated with the communication link; and receiving a second message from the second UE, the second message indicating configuration information for the first communication link between the first UE and the second UE.

Description

Technical Field

[0001] The following discussion relates to wireless communications, including techniques for configuring sidelink data radio bearers (DRBs) for relay communications. Background Technology

[0002] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message sending and receiving, broadcasting, and so on. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems (such as Long Term Evolution (LTE) systems, LTE-A 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 Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations, each supporting wireless communication of communication devices, which may be referred to as User Equipment (UE).

[0003] Wireless communication systems may support sidelink communication. Sidelink communication can be described as communication between two or more UEs. In some examples, UEs participating in sidelink communication may utilize one or more relay devices to extend the range of the sidelink communication. The relay device may receive sidelink messages from the source UE and relay the sidelink messages to the destination UE. Summary of the Invention

[0004] The described technology relates to improved methods, systems, apparatuses, and devices for supporting techniques for configuring sidelink data radio bearers (DRBs) for relay communications. In some examples, a first user equipment (UE) may establish a first communication link with a second UE. The second UE may function or operate as a relay for communication between the first UE and a third UE via an end-to-end communication link. Furthermore, the method may include the first UE sending a first message to the second UE indicating a set of end-to-end service information and quality of service (QoS) profiles associated with the communication link. In some aspects, the end-to-end service information may include one or more QoS flow identifiers (IDs) or one or more DRB IDs, which may be used by the second UE to determine the radio link control (RLC) layer and channel configuration for a second communication link between the second UE and the third UE, and may be mapped to the DRB of the end-to-end communication link. In some examples, the first UE may receive a second message from the second UE indicating configuration information for the first communication link (e.g., a first hop) between the first UE and the second UE. In some examples, the configuration information may include an indication of a QoS profile for a first portion of a QoS profile set associated with the first communication link, or an indication of RLC layer and channel configuration for the first communication link, as determined by the second UE.

[0005] A method for wireless communication by a first UE is described. The method may include: establishing a first communication link with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; sending a first message to the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and receiving a second message from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0006] A first UE for wireless communication is described. The first UE may include: one or more memories storing processor-executable code; and one or more processors coupled to the one or more memories. The one or more processors may operate individually or jointly to execute the code to cause the first UE to: establish a first communication link with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; send a first message to the second UE indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and receive a second message from the second UE indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0007] Another first UE for wireless communication is described. The first UE may include: components for establishing a first communication link with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; components for sending a first message to the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and components for receiving a second message from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0008] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable individually or jointly by one or more processors to: establish a first communication link with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; send a first message to the second UE indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and receive a second message from the second UE indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0009] The methods described herein, examples of the first UE, and non-transitory computer-readable media may also include operations, features, components, or instructions for determining a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to end-to-end communication links, wherein end-to-end service information includes indications of the mapping.

[0010] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for receiving a third message from a network entity that indicates a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs, wherein the mapping may be determined based on the third message.

[0011] In the methods described herein, and in some examples of the first UE and non-transitory computer-readable media, the mapping may be determined based on a pre-configured mapping between one or more end-to-end QoS flow IDs and their corresponding end-to-end DRBs.

[0012] The methods described herein, examples of the first UE, and some examples of nontransitory computer-readable media may also include operations, features, components, or instructions for: determining an end-to-end QoS profile for a first portion of a first communication link based on configuration information indicating an end-to-end QoS profile set for a first portion of the first communication link and one or more corresponding end-to-end QoS flow IDs for the first communication link; and communicating with a third UE via a second UE based on a first RLC layer and channel configuration for the first communication link, the first RLC layer and channel configuration being mapped to an end-to-end DRB of the end-to-end communication link.

[0013] The methods described herein, examples of the first UE, and some examples of nontransitory computer-readable media may also include operations, features, components, or instructions for: determining a first RLC layer and channel configuration for a first communication link based on configuration information indicating a first RLC layer and channel configuration for a first communication link, the first RLC layer and channel configuration being mapped to an end-to-end DRB of the end-to-end communication link; and communicating with a third UE via a second UE based on the first RLC layer and channel configuration.

[0014] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: determining a first RLC layer and channel configuration for a first communication link and a second RLC layer and channel configuration for a second communication link between the second UE and the third UE, wherein the first RLC layer and channel configuration and the second RLC layer and channel configuration may be based on configuration information and a mapping between one or more end-to-end QoS flow IDs and end-to-end DRBs for the end-to-end communication link; sending a fourth message to the second UE indicating an index of the end-to-end DRB and the second RLC layer and channel configuration for the second communication link, wherein the second RLC layer and channel configuration may be mapped to the end-to-end DRB; and communicating with the third UE via the second UE based on the first RLC layer and channel configuration.

[0015] In some examples of the methods described herein, the first UE, and the non-transitory computer-readable medium, the configuration information includes an indication of an end-to-end QoS profile from a first portion of the end-to-end QoS profile set and a set of end-to-end QoS flow IDs corresponding to the end-to-end QoS profile of the first portion.

[0016] In the methods described herein, and in some examples of the first UE and non-transitory computer-readable media, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to a set of end-to-end QoS profiles.

[0017] In some examples of the methods described herein, the first UE, and the non-transitory computer-readable medium, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to an end-to-end QoS profile set or one or more DRB IDs associated with an end-to-end communication link, and configuration information includes an indication of an end-to-end QoS profile from a first portion of the end-to-end QoS profile set, and also includes a set of end-to-end QoS flow IDs corresponding to the first portion of the end-to-end QoS profile or a set of DRB IDs corresponding to the first portion of the end-to-end QoS profile.

[0018] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: determining a first RLC layer and channel configuration for a first communication link, wherein the first RLC layer and channel configuration may be for an end-to-end QoS flow ID set or a DRB ID set; sending a fifth message to the second UE indicating the first RLC layer and channel configuration; and communicating with a third UE via the second UE based on the first RLC layer and channel configuration.

[0019] In some examples of the methods described herein, the first UE, and the non-transitory computer-readable medium, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to a set of end-to-end QoS profiles or one or more DRB IDs associated with an end-to-end communication link, and configuration information includes indications of a first RLC layer and channel configuration for the first communication link, the configuration information also indicating a set of end-to-end QoS flow IDs or a set of DRB IDs associated with the first RLC layer and channel configuration.

[0020] The methods described herein, examples of the first UE, and some examples of nontransitory computer-readable media may also include operations, features, components, or instructions for: determining, based on an indication of a first RLC layer and channel configuration for a first communication link, for an end-to-end QoS flow ID set or DRB ID set; and communicating with a third UE via a second UE based on the first RLC layer and channel configuration.

[0021] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: sending a sixth message to a network entity, the sixth message including an indication of a first RLC layer and channel configuration and an end-to-end QoS profile of a first portion; and receiving a seventh message from the network entity, the seventh message indicating a modified RLC layer and channel configuration that may differ from the first RLC layer and channel configuration indicated by the second UE, wherein the determined first RLC layer and channel configuration includes the modified RLC layer and channel configuration based on the seventh message.

[0022] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: sending a sixth message to a network entity, the sixth message including an indication of a first RLC layer and channel configuration and an end-to-end QoS profile of a first portion; and receiving a seventh message from the network entity, the seventh message indicating an unmodified RLC layer and channel configuration that may be the same as the first RLC layer and channel configuration indicated by the second UE, wherein the determined first RLC layer and channel configuration includes the unmodified RLC layer and channel configuration.

[0023] In some examples of the methods described herein, the first UE, and the non-transitory computer-readable medium, the configuration information also includes indications of the end-to-end QoS profiles of the first part and the second part.

[0024] In some examples of the methods described herein, the first UE, and the non-transitory computer-readable medium, the first message, the second message, or both include a PC5 radio resource control (RRC) message or a PC5 signaling message.

[0025] A method for wireless communication by a first UE is described. The method may include: establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; receiving a first message from the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and sending a second message to the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0026] A first UE for wireless communication is described. The first UE may include: one or more memories storing processor-executable code; and one or more processors coupled to the one or more memories. The one or more processors may operate individually or collectively to execute the code such that the first UE: establishes a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; receives a first message from the second UE indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and sends a second message to the second UE indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0027] Another first UE for wireless communication is described. The first UE may include: components for establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; components for receiving a first message from the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and components for sending a second message to the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0028] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable individually or jointly by one or more processors to: establish a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; receive a first message from the second UE indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and send a second message to the second UE indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0029] In some examples of the methods, first UEs, and nontransitory computer-readable media described herein, end-to-end service information includes indications of mappings between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to end-to-end communication links. The methods, apparatus, and nontransitory computer-readable media may also include operations, features, components, or instructions for: identifying end-to-end DRBs of end-to-end communication links based on the mappings; and determining, for the identified end-to-end DRBs, a first portion of an end-to-end QoS profile and a second portion of an end-to-end QoS profile set, wherein the first portion of the end-to-end QoS profile may be associated with a first communication link, and the second portion of the end-to-end QoS profile may be associated with a second communication link between a first UE and a third UE.

[0030] The methods described herein, some examples of the first UE and nontransitory computer-readable media may also include operations, features, components or instructions for determining a first RLC layer and channel configuration for a first communication link, or a second RLC layer and channel configuration for a second communication link, or both.

[0031] In some examples of the methods, first UEs, and nontransitory computer-readable media described herein, configuration information includes an indication of an end-to-end QoS profile for a first portion and one or more corresponding end-to-end QoS flow IDs for a first communication link, and the methods, apparatus, and nontransitory computer-readable media may also include operations, features, components, or instructions for relaying signaling between a second UE and a third UE based on a second RLC layer and channel configuration for a second communication link.

[0032] In some examples of the methods, first UEs, and nontransitory computer-readable media described herein, configuration information includes indications of a first RLC layer and channel configuration for a first communication link, and the methods, apparatus, and nontransitory computer-readable media may also include operations, features, components, or instructions for relaying signaling between a second UE and a third UE based on a second RLC layer and channel configuration for a second communication link.

[0033] In the methods described herein, in some examples of the first UE and nontransitory computer-readable media, the first RLC layer and channel configuration or the second RLC layer and channel configuration or both may be determined based on signaling from a network entity, or one or more pre-configured RLC layer and channel configurations, or any combination thereof.

[0034] In some examples of the methods, first UEs, and non-transitory computer-readable media described herein, end-to-end service information includes one or more QoS flow IDs corresponding to an end-to-end QoS profile set, and the methods, apparatus, and non-transitory computer-readable media may also include operations, features, components, or instructions for: determining an end-to-end QoS profile of a first portion and an end-to-end QoS profile of a second portion of the end-to-end QoS profile set based on the end-to-end QoS profile set and one or more QoS flow IDs, wherein the end-to-end QoS profile of the first portion may be associated with a first communication link, and the end-to-end QoS profile of the second portion may be associated with a second communication link between the first UE and a third UE, wherein configuration information includes an indication of the end-to-end QoS profile of the first portion and a set of end-to-end QoS flow IDs corresponding to the end-to-end QoS profile of the first portion.

[0035] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: receiving a fourth message from the second UE indicating an index of the end-to-end DRB of the end-to-end communication link and an indication of a second RLC layer and channel configuration for the second communication link, wherein the second RLC layer and channel configuration can be mapped to the end-to-end DRB; determining the second RLC layer and channel configuration based on the indication of the second RLC layer and channel configuration; and relaying signaling between the second UE and the third UE based on the second RLC layer and channel configuration.

[0036] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: sending an eighth message to a network entity, the eighth message including an indication of a second RLC layer and channel configuration; and receiving a ninth message from the network entity, the ninth message indicating a modified RLC layer and channel configuration that may differ from the second RLC layer and channel configuration indicated by the second UE, wherein the determined second RLC layer and channel configuration includes the modified RLC layer and channel configuration.

[0037] In some examples of the methods described herein, the first UE, and the nontransitory computer-readable medium, the eighth message also includes an indication of an end-to-end QoS profile for the second part of the second communication link.

[0038] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: sending an eighth message to a network entity, the eighth message including an indication of a second RLC layer and channel configuration; and receiving a ninth message from the network entity, the ninth message indicating an unmodified RLC layer and channel configuration that may be the same as the second RLC layer and channel configuration indicated by the second UE, wherein the determined second RLC layer and channel configuration includes the unmodified RLC layer and channel configuration.

[0039] In some examples of the methods, first UEs, and non-transitory computer-readable media described herein, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to an end-to-end QoS profile set or one or more DRB IDs associated with an end-to-end communication link. The methods, apparatus, and non-transitory computer-readable media may also include operations, features, components, or instructions for: determining an end-to-end QoS profile of a first portion and an end-to-end QoS profile of a second portion of the end-to-end QoS profile set, wherein the end-to-end QoS profile of the first portion may be associated with a first communication link, and the end-to-end QoS profile of the second portion may be associated with a second communication link between the first UE and a third UE; and wherein configuration information includes an indication of the end-to-end QoS profile of the first portion, and also indicates a first set of end-to-end QoS flow IDs corresponding to the end-to-end QoS profile of the first portion or a set of DRB IDs corresponding to the end-to-end QoS profile of the first portion.

[0040] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: receiving a fifth message from the second UE indicating a first RLC layer and channel configuration for the first communication link, wherein the first RLC layer and channel configuration may be based on a first end-to-end QoS flow ID set or a DRB ID set; determining a second RLC layer and channel configuration for the second communication link based on the first RLC layer and channel configuration, the end-to-end QoS profile of the second portion, the DRB ID set, or any combination thereof; and relaying signaling between the second UE and the third UE based on the second RLC layer and channel configuration.

[0041] In some examples of the methods described herein, the first UE, and the nontransitory computer-readable medium, determining the second RLC layer and channel configuration may include operations, features, components, or instructions for determining the second RLC layer and channel configuration for the second communication link based on the first RLC layer and channel configuration and the end-to-end QoS profile of the second part of the end-to-end QoS flow.

[0042] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: sending a tenth message to a network entity indicating an end-to-end QoS profile of the second part; and receiving an eleventh message from the network entity indicating a second RLC layer and channel configuration that may be based on the end-to-end QoS profile of the second part, wherein the second RLC layer and channel configuration may be determined based on the eleventh message.

[0043] The methods described herein, some examples of the first UE and nontransitory computer-readable media may also include operations, features, components or instructions for storing a first mapping between a first RLC layer and channel configuration and a first communication link, and a second mapping between a second RLC layer and channel configuration and a second communication link.

[0044] In some examples of the methods described herein, the first UE, and the nontransitory computer-readable medium, determining the second RLC layer and channel configuration may include operations, features, components, or instructions for determining the second RLC layer and channel configuration for the second communication link for a set of DRB IDs.

[0045] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for receiving a twelfth message from a network entity indicating a second RLC layer and channel configuration, wherein the second RLC layer and channel configuration may be determined at least in part based on the twelfth message.

[0046] In some examples of the methods described herein, the first UE, and the non-transitory computer-readable medium, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to a set of end-to-end QoS profiles or one or more DRB IDs associated with an end-to-end communication link, and configuration information includes indications of a first RLC layer and channel configuration for the first communication link, the configuration information also indicating a set of end-to-end QoS flow IDs or a set of DRB IDs associated with the first RLC layer and channel configuration.

[0047] The methods described herein, examples of the first UE, and some examples of non-transitory computer-readable media may also include operations, features, components, or instructions for: determining an end-to-end QoS profile of a first portion and a second portion of an end-to-end QoS profile set, wherein the end-to-end QoS profile of the first portion may be associated with a first communication link, and the end-to-end QoS profile of the second portion may be associated with a second communication link between the first UE and the third UE; determining a first RLC layer and channel configuration for the first communication link and a second RLC layer and channel configuration for the second communication link; and relaying signaling between the second UE and the third UE based on the second RLC layer and channel configuration.

[0048] In the methods described herein, in some examples of the first UE and nontransitory computer-readable media, the first RLC layer and channel configuration or the second RLC layer and channel configuration or both may be determined based on signaling from a network entity, or one or more pre-configured RLC layer and channel configurations, or any combination thereof.

[0049] In some examples of the methods described herein, the first UE, and the non-transitory computer-readable medium, the configuration information also includes indications of the end-to-end QoS profiles of the first part and the second part.

[0050] In the methods described herein, and in some examples of the first UE and non-transitory computer-readable media, the first message, the second message, or both include a PC5 RRC message or a PC5 signaling message. Attached Figure Description

[0051] Figure 1 and Figure 2 An example of a wireless communication system is shown that supports techniques for configuring a sidelink data radio bearer (DRB) for relay communication, according to one or more aspects of this disclosure.

[0052] Figures 3 to 7 An example of a process flow supporting one or more aspects of this disclosure for configuring a sidelink DRB for relay communication is shown.

[0053] Figure 8 and Figure 9 A block diagram of an apparatus supporting a technique for configuring a sidelink DRB for relay communication is shown, according to one or more aspects of this disclosure.

[0054] Figure 10 A block diagram of a communication manager supporting techniques for configuring a sidelink DRB for relay communication, according to one or more aspects of this disclosure, is shown.

[0055] Figure 11 A diagram is shown of a system including a device that supports a technology for configuring a sidelink DRB for relay communication, according to one or more aspects of this disclosure.

[0056] Figures 12 to 15 A flowchart illustrating a method for configuring a sidelink DRB for relay communication, according to one or more aspects of this disclosure, is shown. Detailed Implementation

[0057] Wireless communication systems can support sidelink communication. Sidelink communication can be described as communication between two wireless devices (e.g., User Equipment (UE)). To increase the coverage of sidelink communication, a pair of UEs can utilize a relay UE. The relay UE can relay services between a first UE (e.g., a source UE) and a second UE (e.g., a destination UE). In such cases, corresponding communication links can be established between the source UE and the relay UE, and between the relay UE and the destination UE, where the corresponding communication links can be referred to as "hops" or some similar term. In some examples, the relay UE can support Layer 2 signal relay. To support end-to-end Quality of Service (QoS) for Layer 2 signal relay, the relay UE can configure a Radio Link Control (RLC) layer channel for the second hop (e.g., from the relay UE to the destination UE) of an end-to-end communication link (e.g., from the source UE to the destination UE) that meets end-to-end QoS requirements. However, the relay UE may not be aware of the mapping between the end-to-end QoS Flow Identifier (ID) and the end-to-end Data Radio Bearer (DRB) (e.g., for the first hop between the source UE and the relay UE, it can be determined by the source UE), and the relay UE may not be able to configure the RLC channel for the second hop in a way that meets the end-to-end QoS service requirements for the end-to-end communication link between the source UE and the destination UE.

[0058] As described herein, a relay UE can receive QoS profiles and service information (e.g., QoS flow IDs and DRB IDs), enabling the relay UE to derive an RLC channel configuration for the second hop. In one example, the source UE can send signaling to the relay UE indicating the mapping between QoS flow IDs and DRB IDs, as well as signaling indicating the QoS flow IDs and their corresponding QoS profiles. Based on this signaling, the relay UE can derive one or both of the RLC channel configurations for the first or second hop. In another example, the source UE can send signaling to the relay UE indicating the QoS flow IDs and their corresponding QoS profiles. Based on this signaling, the relay UE can derive the QoS profiles for each hop and send the per-hop QoS to the source UE, enabling the source UE to derive an RLC channel configuration for both hops. The method described herein enables coordination of RLC layer and channel configurations between UEs, satisfying end-to-end QoS requirements for relay communications (e.g., for Layer 2 based relays).

[0059] The aspects of this disclosure are first described in the context of a wireless communication system. Additional aspects are described in the context of a process flow. The aspects of this disclosure are further illustrated and described by means of and reference to apparatus diagrams, system diagrams, and flowcharts relating to the technology used to configure a sidelink DRB for relay communication.

[0060] Figure 1 An example of a wireless communication system 100 supporting techniques for configuring a sidelink DRB for relay communications, according to one or more aspects of this disclosure, is shown. The wireless communication 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 communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating under other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.

[0061] Network entity 105 may be distributed across a geographical area to form wireless communication system 100, and may include devices employing different forms or having different capabilities. In various examples, network entity 105 may be referred to as a network element, mobility element, radio access network (RAN) node, or network equipment, etc. In some examples, network entity 105 and UE 115 may wirelessly communicate via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, network entity 105 may support coverage area 110 (e.g., a geographical coverage area) within which UE 115 and network entity 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographical area within which network entity 105 and UE 115 may support the transmission of signals according to one or more radio access technologies (RATs).

[0062] UE 115 can be distributed throughout the coverage area 110 of wireless communication system 100, and each UE 115 can be stationary or mobile, or stationary and mobile at different times. UE 115 can be devices in different forms or with different capabilities. Figure 1 Some example UE 115s are illustrated herein. The UE 115 described herein can be able to support various types of devices, such as... Figure 1 The other UE 115 or network entity 105 shown communicates.

[0063] As described herein, nodes of the wireless communication system 100 (which may be referred to as network nodes or wireless nodes) may be network entity 105 (e.g., any network entity described herein), UE 115 (e.g., any UE described herein), network controller, apparatus, device, 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 UE 115. Alternatively, a node may be network entity 105. Furthermore, a first node may be configured to communicate with a second or third node. In one aspect of this example, the first node may be UE 115, the second node may be network entity 105, and the third node may be UE 115. In another aspect of this example, the first node may be UE 115, the second node may be network entity 105, and the third node may be network entity 105. In other aspects of this example, the first node, the second node, and the third node may be different from these examples. Similarly, references to UE 115, network entity 105, device, equipment, computing system, etc., may include disclosures of UE 115, network entity 105, device, equipment, computing system, etc., as nodes. For example, a disclosure that UE 115 is configured to receive information from network entity 105 also discloses that a first node is configured to receive information from a second node.

[0064] In some examples, network entity 105 may communicate with core network 130, communicate with each other, or both. For example, network entity 105 may communicate with core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, network entities 105 may communicate with each other directly (e.g., directly between network entities 105) or indirectly (e.g., via core network 130) via backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, network entities 105 may communicate with each other via midhaul communication link 162 (e.g., according to midhaul interface protocol) or fronthaul communication link 168 (e.g., according to fronthaul interface protocol) or any combination thereof. Backhaul communication link 120, midhaul communication link 162, or fronthaul communication link 168 may be or include one or more wired links (e.g., electrical links, fiber optic links), one or more wireless links (e.g., radio links, wireless optical links), etc., or various combinations thereof. UE 115 can communicate with core network 130 via communication link 155.

[0065] One or more network entities in network entity 105 described herein may include or be referred to as base station 140 (e.g., transceiver base station, radio base station, NR base station, access point, radio transceiver, node B, eNodeB (eNB), next-generation node B or gigabit node B (any of which may be referred to as gNB), 5G NB, next-generation eNB (ng-eNB), home node B, home evolution node B, or other suitable terms). In some examples, network entity 105 (e.g., base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture that 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 base station 140).

[0066] In some examples, network entity 105 may be implemented in a decomposed architecture (e.g., a decomposed base station architecture, a decomposed RAN architecture) that can be configured to utilize protocol stacks physically or logically distributed across 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, network entity 105 may include one or more of the following: 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, a non-real-time RIC), a Service Management and Orchestration (SMO) 180 system, or any combination thereof. 170 may also be referred to as a radio headend, intelligent radio headend, remote radio headend (RRH), remote radio unit (RRU), or transmit / receive point (TRP). One or more components of network entity 105 in a decomposed RAN architecture may be co-located, or one or more components of network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 in a decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0067] The functional splitting among CU 160, DU 165, and RU 170 is flexible and can support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof) are performed at CU 160, DU 165, or RU 170. For example, a protocol stack functional splitting can be used between CU 160 and DU 165, allowing CU 160 to support one or more layers of the protocol stack, and DU 165 to support one or more different layers of the protocol stack. In some examples, CU 160 can host higher protocol layer (e.g., Layer 3 (L3), Layer 2 (L2)) functionalities and signaling (e.g., Radio Resource Control (RRC), Serving Data Adaptation Protocol (SDAP), Packet Data Convergence Protocol (PDCP)). CU 160 can be connected to one or more DU 165 or RU 170, and the one or more DU 165 or RU 170 can host lower protocol layers, such as Layer 1 (L1) (e.g., Physical (PHY) layer) or L2 (e.g., RLC layer, Media Access Control (MAC) layer) functionality and signaling, and each can be at least partially controlled by CU 160. Additionally or alternatively, a protocol stack functional split can be employed between DU 165 and RU 170, such that DU 165 can support one or more layers of the protocol stack, and RU 170 can support one or more different layers of the protocol stack. DU 165 can support one or more different cells (e.g., via one or more RU 170). In some cases, functional decomposition between CU 160 and DU 165, or between DU 165 and RU 170, can be performed within the protocol layer (e.g., some functions of the protocol layer can be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer can be performed by different of CU 160, DU 165, or RU 170). CU 160 can be further functionally decomposed into CU control plane (CU-CP) functions and CU user plane (CU-UP) functions. CU 160 can be connected to one or more DU 165 via midhaul communication link 162 (e.g., F1, F1-c, F1-u), and DU 165 can be connected to one or more RU 170 via fronthaul communication link 168 (e.g., open fronthaul (FH) interface). In some examples, the midhaul communication link 162 or the fronthaul communication link 168 may be implemented based on the interfaces (e.g., channels) between the layers of the protocol stack, which are supported by the corresponding network entities 105 communicating via such communication links.

[0068] In a wireless communication system (e.g., wireless communication system 100), the infrastructure and spectrum resources for radio access can support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB node 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as donor entities or IAB donors. One or more DU 165s or one or more RU 170s may be partially controlled by one or more CU 160s associated with donor network entity 105 (e.g., donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB node 104) via supported access and backhaul links (e.g., backhaul communication link 120). IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a DU 165 of a coupled IAB donor. The IAB-MT may include a separate set of antennas for relaying communication with UE 115, or may share the same antennas (e.g., those of RU 170) for access to IAB node 104 via DU 165 of IAB node 104. (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the decomposed RAN architecture (e.g., one or more IAB nodes 104 or components of IAB node 104) may be configured to operate according to the techniques described herein.

[0069] In the context of applying the techniques described herein to a decomposed RAN architecture, one or more components of the decomposed RAN architecture can be configured to support techniques as described herein for configuring sidelink DRBs for relay communications. For example, some operations described as being performed by UE 115 or network entity 105 (e.g., base station 140) may additionally or alternatively be performed by one or more components of the decomposed RAN architecture (e.g., IAB node 104, DU 165, CU 160, RU 170, RIC 175, SMO 180).

[0070] UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or any other suitable term, wherein "device" may also be referred to as a cell, station, terminal, or client, etc. UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine-type communication (MTC) device, etc., which may be implemented in various objects such as appliances or vehicles, meters, etc.

[0071] The UE 115 described herein can communicate with various types of devices, such as other UEs 115 that may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc. Figure 1 As shown.

[0072] UE 115 and network entity 105 can wirelessly communicate with each other via one or more communication links 125 (e.g., access links) using resources associated with one or more carriers. The term "carrier" can refer to a set of RF spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion of the RF spectrum band (e.g., a bandwidth portion (BWP)) operating 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 coordinating carrier operation, user data, or other signaling. Wireless communication system 100 may support communication with UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, UE 115 may be configured to utilize multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation can be used in conjunction with both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers. Communication between network entity 105 and other devices can refer to communication between these devices and any part of network entity 105 (e.g., entity, sub-entity). For example, the terms “send,” “receive,” or “communicate” when referring to network entity 105 can refer to any part of the RAN’s network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) communicating with another device (e.g., directly or via one or more other network entities 105).

[0073] The signal waveform transmitted via a carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform extended OFDM (DFT-S-OFDM)). In a system employing MCM, a resource element may refer to a resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the decoding rate of the modulation scheme, or both), such that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high modulation scheme order correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial resources may increase the data rate or data integrity used for communication with UE 115.

[0074] The time interval for network entity 105 or UE 115 can be expressed as a multiple of a basic time unit, such as the sampling period. seconds, of which It can represent the supported subcarrier spacing, and This can represent the supported Discrete Fourier Transform (DFT) size. The time interval of the communication resources can be organized according to radio frames, each with a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0075] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may (e.g., in the time domain) be divided into subframes, and each subframe may be further divided into a number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix appended to each symbol period). In some wireless communication systems 100, time slots may be further divided into multiple micro-time slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., The duration of a symbol period is associated with a (number) sampling period. The duration of a symbol period can depend on the subcarrier spacing or the operating frequency band.

[0076] A subframe, time slot, micro-time slot, or symbol can be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).

[0077] Depending on the technology, carriers can be used to multiplex physical channels for communication. One or more of Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), or hybrid TDM-FDM techniques can be used, for example, to multiplex physical control channels and physical data channels for signaling via a downlink carrier. The control region (e.g., control resource set (CORESET)) of the physical control channel can be defined by a set of symbol periods and can extend across the system bandwidth of the carrier or a subset of that bandwidth. One or more control regions (e.g., CORESET) can be configured for a set of UEs 115. For example, one or more UEs in UE 115 can monitor or search for control regions to obtain control information based on one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a concatenated manner. The aggregation level of control channel candidates can refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space set may include: a common search space set configured to transmit control information to multiple UEs 115, and a UE-specific search space set used to transmit control information to a specific UE 115.

[0078] In some examples, network entity 105 (e.g., base station 140, RU 170) may be mobile, and thus provide communication coverage to mobile coverage areas 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, overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of network entities 105 use the same or different radio access technologies to provide coverage for various coverage areas 110.

[0079] Some UE 115 devices (such as MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with network entity 105 (e.g., base station 140) without human intervention. In some examples, M2M communication or MTC may include communication from devices with integrated sensors or meters to measure or acquire information and relay such information to a central server or application that uses the information or presents it to people interacting with the application. Some UE 115 devices may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial toll collection.

[0080] Wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). UE 115 may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communication may include private 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 prioritizing services, and such services may be used for public safety or general business applications. The terms “ultra-reliable,” “low-latency,” and “ultra-reliable low-latency” are used interchangeably herein.

[0081] In some examples, UE 115 may be configured to support direct communication with other UE 115s via device-to-device (D2D) communication link 135 (e.g., according to peer-to-peer (P2P), D2D, or sidelink protocols). In some examples, one or more UE 115s performing D2D communication in a group may be within the coverage area 110 of network entity 105 (e.g., base station 140, RU 170), which may support aspects of such D2D communication configured (e.g., scheduled by network entity 105). In some examples, one or more UE 115s in such a group may be outside the coverage area 110 of network entity 105, or may otherwise be unable or not configured to receive transmissions from network entity 105. In some examples, the group of UE 115s communicating via D2D communication may support a one-to-many (1:M) system, where each UE 115 transmits to each of the other UE 115s in the group. In some examples, network entity 105 may facilitate the scheduling of resources used for D2D communication. In other examples, D2D communication may be performed between UEs 115 without involving network entity 105.

[0082] In some systems, the D2D communication link 135 may be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, vehicles may communicate using vehicle-to-vehicle (V2X) communication, vehicle-to-vehicle (V2V) communication, or a combination of these. Vehicles may signal information related to traffic conditions, signal control, weather, safety, emergencies, or any other information relevant to the V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure (such as roadside units), or communicate with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170) using vehicle-to-network (V2N) communication, or both.

[0083] Core network 130 provides user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), access and mobility management function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), packet data network (PDN) gateway (P-GW), or user plane function (UPF)) for routing packets or interconnecting to external networks. The control plane entity manages non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by network entity 105 (e.g., base station 140) associated with core network 130. User IP packets can be delivered through the user plane entity, which provides IP address allocation and other functions. The user plane entity may connect to one or more network operator IP services 150. IP services 150 may include access to the Internet, intranets, IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0084] Wireless communication system 100 can operate using one or more frequency bands in the range of 300 MHz to 300 GHz. Generally, the area from 300 MHz to 3 GHz is referred to as the Ultra High Frequency (UHF) band or decimeter band because the wavelength range is 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 these waves are sufficient to penetrate structures so that macrocells can provide service to UE 115 located indoors. Compared to communication using smaller frequencies and longer waves in the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum below 300 MHz, communication using UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0085] Wireless communication system 100 may utilize both licensed and unlicensed RF spectrum bands. For example, wireless communication system 100 may use unlicensed bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band) to employ Licensed Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology. When operating with unlicensed RF spectrum, devices such as network entity 105 and UE 115 may employ carrier sensing for collision detection and avoidance. In some examples, operation using unlicensed bands may be combined with component carriers operating with licensed bands based on carrier aggregation configurations (e.g., LAA). Operation using unlicensed spectrum may include downlink transmission, uplink transmission, P2P transmission, or D2D transmission, etc.

[0086] Network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of network entity 105 or UE 115 may be located within one or more antenna arrays or antenna panels, which can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with network entity 105 may be located at different geographical locations. Network entity 105 may include an antenna array having a collection of multiple rows and columns of antenna ports that network entity 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may include one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals transmitted via the antenna ports.

[0087] Beamforming (also known as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting or receiving device (e.g., network entity 105, UE 115) to shape or guide an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array such that some signals propagating along a specific orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to the signals transmitted via the antenna elements may include applying amplitude shifts, phase shifts, or both to the signals carried via the antenna elements associated with the device. The adjustments associated with each of these antenna elements may be defined by a beamforming weight set associated with a specific orientation (e.g., relative to the antenna array of the transmitting or receiving device or relative to some other orientation).

[0088] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or PDCP layer can be IP-based. The RLC layer performs packet segmentation and reassembly for transmission via logical channels. The MAC layer performs priority handling and multiplexing of logical channels to transport channels. The MAC layer can also implement error detection, error correction, or both to support retransmission and improve link efficiency. In the control plane, the RRC layer provides the establishment, configuration, and maintenance of RRC connections between the UE 115 and network entity 105 or core network 130 that support user plane data radio bearers. The PHY layer maps transport channels to physical channels.

[0089] The wireless communication system 100 supports techniques for coordinating RLC channel configurations to support end-to-end QoS requirements. As described herein, a first UE 115 may establish a first communication link with a second UE 115. The second UE 115 may function or operate as a relay for communication between the first UE 115 and a third UE 115 via the end-to-end communication link. Furthermore, the method may include the first UE 115 sending a first message to the second UE 115 indicating a set of end-to-end service information and QoS profiles associated with the communication link. In some aspects, the end-to-end service information may include one or more QoS flow IDs or one or more DRB IDs, which may be used by the second UE 115 to determine the RLC layer and channel configuration for the second communication link between the second UE 115 and the third UE 115, and may be mapped to the DRB of the end-to-end communication link. In some examples, the first UE 115 may receive a second message from the second UE 115 indicating configuration information for a first communication link (e.g., for a first hop) between the first UE 115 and the second UE 115. In some examples, the configuration information may include an indication of a QoS profile for a first portion of a QoS profile set associated with the first communication link, or an indication of RLC layer and channel configuration for the first communication link, as determined by the second UE 115.

[0090] Figure 2 Examples of wireless communication system 200 supporting techniques for configuring a sidelink DRB for relay communication according to one or more aspects of this disclosure are shown. In some examples, wireless communication system 200 may support aspects of wireless communication system 100. For example, wireless communication system 200 may include UE 215, which may be as described in reference... Figure 1 An example of UE115 as described.

[0091] In some examples, the wireless communication system 200 may support sidelink communication. Sidelink communication can be described as communication between two or more UEs. Figure 2In the example, sidelink communication may include communication between UE 215-a and UE 215-c. However, in some cases, UE 215-a and UE 215-c may be outside each other's range and may not be able to communicate via sidelink, or in another case, the direct communication link between UE 215-a and UE 215-c may be blocked (e.g., by a physical object), causing sidelink communication between UE 215-a and UE 215-c to fail. In such scenarios, UE 215-a and UE 215-c may utilize UE 215-b (e.g., a relay UE) to perform sidelink communication with each other.

[0092] The purpose of a relay UE can be to relay messages from a source UE (e.g., UE 215-a) and a destination UE (e.g., UE 215-c). As an example, UE 215-a may send a message to UE 215-b via link 205-a (or a first hop), and UE 215-b may relay the message to UE 215-c via link 205-b (or a second hop). UE 215-b may be located in a different area or location than UE 215-a and UE 215-c (e.g., between UE 215-a and UE 215-c), which may increase the coverage of UE 215-a and UE 215-c, or allow UE 215-a and UE 215-c to avoid obstacles that would otherwise obstruct sidelink communication between UE 215-a and UE 215-c. In order for UE 215-b to be used for sidelink communication between UE 215-a and UE 215-c, UE 215-a, UE 215-b and UE 215-c may undergo one or more operations, including relay discovery, route discovery and selection, per-hop link (or link 205-a and link 205-b) establishment, end-to-end link (or link 205-c) establishment and end-to-end QoS management.

[0093] In some cases, a UE (e.g., UE 215-a, UE 215-b, and / or UE 215-c) may support different relay technologies, which may be associated with different protocol stacks. For example, a Layer 3 relay may be associated with a Layer 3 relay protocol stack (e.g., including a control plane (PC5-S, PC5-RRC) protocol stack and a user plane protocol stack), while a Layer 2 relay may be associated with a Layer 2 protocol stack (e.g., including a control plane (PC5-S, PC5-RRC) protocol stack and a user plane protocol stack). The Layer 3 protocol stack may include the Physical (PHY) layer, MAC layer, RLC layer, Sidelink Relay Adaptation (SRAP) layer, Packet Data Convergence Protocol (PDCP) layer, and a ProSe Sidelink (PC5) layer for the control plane (e.g., PCS signaling (PC5-S) or PCS-RRC) or an IP / non-IP layer for the user plane. Alternatively, the Layer 2 protocol stack may include the PHY layer, MAC layer, RLC layer, and SRAP layer. Link 205-c between UE 215-a and UE 215-c (e.g., an end-to-end communication link) may support PC5 layer and PDCP layer, while link 205-a between UE 215-a and UE 215-b (first communication link, first part of link 205-c, first hop) and link 205-b between UE 215-b and UE 215-c (second communication link, second part of link 205-c, second hop) may not support PC5 layer and PDCP layer.

[0094] In some examples, UE 215-a and UE 215-c can utilize one or more DRBs (e.g., end-to-end side link (SL) DRBs) to communicate with each other using link 205-c (or end-to-end communication links) on the PDCP and PC5 layers of the Layer 3 protocol stack. Furthermore, each of the one or more DRBs can be mapped to one or more QoS flows (e.g., end-to-end QoS flows). QoS flows can allow for prioritization of different applications, users, or data flows, or can guarantee a specific performance level for a data flow. The type of QoS flow can include a Guaranteed Bit Rate (GBR) QoS flow, a non-GBR QoS flow, or a delay-critical QoS flow. Additionally, each QoS flow can be characterized by a QoS profile. The QoS profile can include PC5 QoS parameters such as the PC5 QoS Indicator (PQI), PC5 flow bit rate, PC5 link aggregation bit rate, range, and default values. PQI can be referred to as a special 5QI and can be used as a reference for PC5 QoS characteristics such as resource type (e.g., GBR, delay critical, or non-GBR), priority level, packet delay budget, packet error rate, average window, or maximum data burst size.

[0095] To implement end-to-end QoS for sidelink communication between UE 215-a and UE 215-c, the RLC layer and channels corresponding to link 205-a and link 205-b can be configured to meet QoS requirements. However, UE 215-b may not be able to configure the RLC layer and channels corresponding to link 205-b because UE 215-b may not have access to the service information used to configure the RLC layer and channels corresponding to link 205-b.

[0096] As described herein, UE 215-b obtains service information 210 and uses it to configure the RLC layer and channels for link 205-b, ensuring that the RLC layer and channels comply with QoS requirements. Service information 210 may refer to end-to-end service information and may be associated with link 205-c. Alternatively, the channel configuration component 220 of UE 215-a may derive the RLC layer and channel configuration for link 205-b based on signaling received from UE 215-a indicating the mapping between QoS flow IDs and DRB IDs (or end-to-end service information) and splitting the QoS profile corresponding to each DRB into QoS flows for link 205-a and QoS flows for link 205-b, such as... Figure 3 More detailed descriptions are available in the text.

[0097] Additionally or alternatively, UE 215-a can derive the RLC layer and channel configuration for link 205-a and the RLC layer and channel configuration for link 205-b, and provide UE 215-b with the RLC configuration for link 205-b, such as Figure 4 As described in more detail below. Additionally or alternatively, UE 215-a exports the RLC layer and channel configuration for link 205-a and provides this RLC layer and channel configuration, along with the corresponding QoS flow ID, to UE 215-b, so that UE 215-b can export the RLC layer and channel configuration for link 205-b, as described in... Figure 5 It is described in more detail in the text.

[0098] Additionally or alternatively, UE 215-b can derive the RLC layer and channel configuration for link 205-a and the RLC layer and channel configuration for link 205-b, and provide UE 215-a with the RLC layer and channel configuration for link 205-a and the corresponding QoS flow ID or DRB ID, as shown in Figure 6As described in more detail below. In some examples, there may be multiple DRBs configured for link 205-c. In this case, UE 215-a or UE 215-b may determine multiple RLC layer and channel configurations for each of the multiple DRBs for each of links 205-a and 205-b (e.g., using the methods described above).

[0099] UE 215-a can then use the RLC layer and channel configuration for link 205-a to send one or more packets to UE 215-b, and UE 215-b can use the RLC layer and channel configuration for link 205-b to forward one or more packets to UE 215-c. Using the method described herein allows relay UEs to comply with Layer 3 QoS requirements during sidelink communication.

[0100] Figure 3 An example of a process flow 300 supporting one or more aspects of this disclosure for configuring a sidelink DRB for relay communication is shown. In some examples, process flow 300 may implement or be implemented by aspects of wireless communication system 100 and wireless communication system 200. For example, process flow 300 may be performed by UE 315, which may be as described in reference Figure 1 and Figure 2 Examples of UE 115 and UE 215 are described. The following alternative examples may be implemented, some of which involve steps performed in a different order than those described, or not performed at all. In some cases, steps may include additional features not mentioned below, or additional steps may be added.

[0101] For reference Figure 2 The described wireless communication system supports sidelink communication. Figure 3 In the example, sidelink communication may occur between UE 315-a (e.g., the source UE) and UE 315-c (e.g., the destination UE), where UE 315-b acts as a relay between UE 315-a and UE 315-c.

[0102] At position 305, UE 315-a may send a first signaling to UE 315-b indicating a mapping between one or more QoS flows and one or more DRBs. As an example, the first signaling may indicate that a first PC5 QoS flow ID (e.g., PFI#1), a second PC5 QoS flow ID (e.g., PFI#2), and a third PC5 QoS flow ID (e.g., PFI#3) are mapped to a first end-to-end SL-DRB ID (e.g., DRB#1). In some examples, UE 315-a may receive the mapping from a network entity, or UE 315-a may be pre-configured with the mapping. Furthermore, UE 315-a may send the first signaling including the mapping to UE 315-b via a PC5-RRC message or a PC5-S message.

[0103] At 310, UE 315-a may send a second signaling to UE 315-b indicating one or more QoS flows (or QoS flow IDs) and their corresponding QoS profiles. In some examples, UE 315-a may send the second signaling to UE 315-b via a PC5-RRC message or a PC5-S message.

[0104] At 320, using one or both of the first or second signaling, UE 315-b may derive (e.g., determine) one or more DRBs, and additionally, derive a QoS profile for each of the one or more DRBs.

[0105] At 325, UE 315-b can split the QoS profile for each DRB in one or more DRBs into a per-hop QoS profile. Figure 3 In the example, UE 315-a can communicate with UE 315-c in two hops. The first hop can refer to communication between UE 315-a and UE 315-b, and the second hop can refer to communication between UE 315-b and UE 315-c. Therefore, for each DRB, UE 315-b can split its QoS profile into a first part for the first hop and a second part for the second hop.

[0106] Furthermore, UE 315-b can derive the RLC layer and channel configuration for one or both of the first hop and the second hop. As an example, at 330-a, UE 315-b can utilize one or both of the first signaling to derive the RLC layer and channel configuration for the second hop. After deriving the RLC layer and channel configuration for the second hop, UE 315-b can send a third signaling to UE 315-a indicating a QoS profile for the first hop and the QoS flows (e.g., one or more QoS flow IDs) corresponding to the QoS profile. In some examples, UE 315-b can send the third signaling to UE 315-a via a PC5-S message or a PC5-RRC message. Using the third signaling, UE 315-a can derive (e.g., determine) the RLC layer and channel configuration for the first hop.

[0107] Alternatively, at 330-b, UE 315-b may use the QoS profile corresponding to the first part of the first hop to derive the RLC layer and channel configuration for the first hop, and additionally, use the QoS profile corresponding to the second part of the second hop to derive the RLC layer and channel configuration for the second hop. Furthermore, UE 315-b may send a fourth signaling to UE 315-a indicating the RLC layer and channel configuration for the first hop. In some examples, UE 315-b may send the fourth signaling to UE 315-a via a PC5-S message or a PC5-RRC message.

[0108] In either 330-a or 330-b, UE 315-b may obtain from a network entity either the RLC layer and channel configuration for the first hop or the RLC layer and channel configuration for the second hop, or both. For example, UE 315-b may send a QoS profile corresponding to a second portion of the second hop to the network entity. The network entity may derive the RLC layer and channel configuration for the second hop and send a fifth signaling to UE 315-b indicating the RLC layer and channel configuration for the second hop. Alternatively, UE 315-b may use pre-configuration to obtain the RLC layer and channel configuration for the first hop or the RLC layer and channel configuration for the second hop.

[0109] At 335, UE 315-a can use the RLC layer and channel configuration for the first hop to send packets to UE 315-b, and UE 315-b can use the RLC layer and channel configuration for the second hop to relay packets to UE 315-c.

[0110] Figure 4Examples of process flow 400 supporting techniques for configuring a sidelink DRB for relay communication according to one or more aspects of this disclosure are shown. In some examples, process flow 400 may implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, or process flow 300. For example, process flow 400 may be executed by UE 415, which may be as described in the reference... Figures 1 to 3 Examples of UE 115, UE 215, or UE 315 described. Alternative examples are possible, some of which may be performed in a different order than described or not at all. In some cases, steps may include additional features not mentioned below, or additional steps may be added.

[0111] For reference Figure 2 The described wireless communication system supports sidelink communication. Figure 4 In the example, sidelink communication may occur between UE 415-a (e.g., the source UE) and UE 415-c (e.g., the destination UE), where UE 415-b acts as a relay between UE 415-a and UE 415-c.

[0112] At position 405, UE 415-a may send a first signaling message to UE 415-b indicating the QoS profile and the corresponding QoS flow (or QoS flow ID). In some examples, UE 415-a may use a PC5-S message or a PC5-RRC message to send the first signaling message to UE 415-b.

[0113] At position 410, UE 415-b can split the QoS profile into per-hop QoS profiles. Figure 4 In the example, UE 415-a can communicate with UE 415-c in two hops. The first hop can refer to the communication between UE 415-a and UE 415-b, and the second hop can refer to the communication between UE 415-b and UE 415-c. Therefore, UE 415-b can split its QoS profile into a first part for the first hop and a second part for the second hop.

[0114] At 420, UE 415-b can send a second signaling message to UE 415-a indicating the QoS profile for the first part of the first hop and the corresponding QoS flow. In some examples, UE 415-b can send the second signaling message to UE 415-a using a PC5-S message or a PC5-RRC message.

[0115] At 425, UE 415-a can use the mapping between one or more DRBs and one or more QoS flows to derive the RLC layer and channel configuration for the first hop and the RLC layer and channel configuration for the second hop.

[0116] At 430, UE 415-a may send third signaling to UE 415-b indicating the RLC layer and channel configuration for the second hop, as well as one or more DRBs (or one or more DRB IDs). In some examples, UE 415-a may use a PC5-S message or a PC5-RRC message to send the third signaling to UE 415-b.

[0117] At 435, UE 415-a may utilize (or consider) the RLC layer and channel configuration used for the second hop to derive a second RLC layer and channel configuration for the second hop against one or more DRBs. In some examples, UE 415-a may send a fourth signaling to a network entity indicating the RLC layer and channel configuration received from UE 415-a, as well as a QoS profile for a second portion optionally used for the second hop. The network entity may utilize the fourth signaling to derive the second RLC layer and channel configuration and send a fifth signaling to UE 415-b indicating the second RLC layer and channel configuration.

[0118] At 440, UE 415-a can use the RLC layer and channel configuration for the first hop to send packets to UE 415-b, and UE 415-b can use the second RLC layer and channel configuration for the second hop to relay packets to UE 415-c.

[0119] Figure 5 An example of a process flow 500 supporting one or more aspects of this disclosure for configuring a sidelink DRB for relay communication is shown. In some examples, process flow 500 may implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, process flow 300, and process flow 400. For example, process flow 500 may be executed by UE 515, which may be as described in the reference... Figures 1 to 4 Examples of UE 115, UE 215, UE 315, or UE 415 described herein. Alternative examples are possible, some of which may be performed in a different order than described or not at all. In some cases, steps may include additional features not mentioned below, or additional steps may be added.

[0120] For reference Figure 2 The described wireless communication system supports sidelink communication. Figure 5In the example, sidelink communication may occur between UE 515-a (e.g., the source UE) and UE 515-c (e.g., the destination UE), where UE 515-b acts as a relay between UE 515-a and UE 515-c.

[0121] At position 505, UE 515-a may send a first signaling message to UE 515-b indicating one or more QoS profiles and the corresponding QoS flow (or QoS flow ID) or the corresponding DRB (or DRB ID). In some examples, UE 515-a may send the first signaling message to UE 515-b via a PC5-S message or a PC5-RRC message.

[0122] At position 510, UE 515-b can split the QoS profile into per-hop QoS profiles. Figure 5 In the example, UE 515-a can communicate with UE 515-c in two hops. The first hop can refer to communication between UE 515-a and UE 515-b, and the second hop can refer to communication between UE 515-b and UE 515-c. Therefore, UE 515-b can split its QoS profile into a first part for the first hop and a second part for the second hop.

[0123] At position 520, UE 515-b may send a second signaling message to UE 515-a indicating a QoS profile for the first part of the first hop and the corresponding QoS flow or DRB. In some examples, UE 515-b may send the second signaling message to UE 515-a via a PC5-S message or a PC5-RRC message.

[0124] At 525, using the second signaling, UE 515-a can export the RLC layer and channel configuration for the first hop for the corresponding QoS flow or DRB.

[0125] At 530, UE 515-a may send a third signaling message to UE 515-b indicating the RLC layer and channel configuration for the first hop. In some examples, UE 515-a may send the third signaling message to UE 515-b via a PC5-S message or a PC5-RRC message.

[0126] At 535, UE 515-b can derive the RLC layer and channel configuration for the second hop. For example, UE 515-b can utilize (or consider) the RLC layer and channel configuration for the first hop and the QoS profile for the second hop to derive (e.g., determine) the RLC layer and channel configuration for the second hop for the corresponding QoS flow or DRB. In some examples, UE 515-b can send a second portion of the QoS profile for the second hop to the network entity. Using the second portion of the QoS profile for the second hop, the network entity can derive the RLC layer and channel configuration for the second hop for the QoS flow or DRB and send a fourth signaling to UE 515-b indicating the RLC layer and channel configuration for the second hop.

[0127] At 540, UE 515-a can use the RLC channel configuration for the first hop to send packets to UE 515-b, and UE 515-b can use the RLC layer and channel configuration for the second hop to relay packets to UE 515-c. In some examples, UE 515-b may maintain a mapping between the RLC layer and channel configuration and the corresponding hop. That is, UE 515-b may store (e.g., in one or more memories) one or more mapping configurations for use with future communications in which UE 515-b operates as a relay UE (e.g., between UE 515-a and UE 515-c).

[0128] Figure 6 An example of a process flow 600 supporting one or more aspects of this disclosure for configuring a sidelink DRB for relay communication is shown. In some examples, process flow 600 may implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, process flow 300, process flow 400, and process flow 600. For example, process flow 600 may be executed by UE 615, which may be as described in the reference... Figures 1 to 5 Examples of UE 115, UE 215, UE 315, UE 415, or UE 515 described herein. Alternative examples are possible, some of which may be performed in a different order than described or not at all. In some cases, steps may include additional features not mentioned below, or additional steps may be added.

[0129] For reference Figure 2 The described wireless communication system supports sidelink communication. Figure 6 In the example, sidelink communication may occur between UE 615-a (e.g., the source UE) and UE 615-c (e.g., the destination UE), where UE 615-b acts as a relay between UE 615-a and UE 615-c.

[0130] At position 605, UE 615-a may send a first signaling message to UE 615-b indicating the QoS profile and the corresponding QoS flow (or QoS flow ID) or DRB (or DRB ID). In some examples, UE 615-a may send the first signaling message via a PC5-S message or a PC5-RRC message.

[0131] At position 610, UE 615-b can split the QoS profile into per-hop QoS profiles. Figure 6 In the example, UE 615-a can communicate with UE 615-c in two hops. The first hop can refer to the communication between UE 615-a and UE 615-b, and the second hop can refer to the communication between UE 615-b and UE 615-c. Therefore, UE 615-b can split its QoS profile into a first part for the first hop and a second part for the second hop.

[0132] At 620, UE 615-b can export the RLC layer and channel configuration for the first hop (e.g., using the first part of the QoS profile corresponding to the first hop) and the RLC layer and channel configuration for the second hop (e.g., using the second part of the QoS profile corresponding to the second hop) for the corresponding QoS flow or DRB.

[0133] At position 625, UE 615-b may send a second signaling to UE 615-a indicating the RLC layer and channel configuration for the first hop, as well as the corresponding QoS flow or DRB. Furthermore, the second signaling may optionally include either the QoS profile from the first part or the second part. In some examples, UE 615-b may send the second signaling via a PC5-S message or a PC5-RRC message.

[0134] At 630, UE 615-a may utilize (or consider) the RLC layer and channel configuration received from UE 615-b for the first hop to derive (e.g., determine) a second RLC layer and channel configuration for the first hop for the corresponding QoS flow or DRB. In some examples, UE 615-b may send a third signaling to the network entity indicating the RLC layer and channel configuration for the first hop and the QoS profile for the first hop. The network entity may utilize the third signaling to derive the second RLC layer and channel configuration for the first hop and send a fourth signaling to UE 615-b indicating the second RLC layer and channel configuration for the first hop.

[0135] At 635, UE 615-a can use the second RLC layer and channel configuration for the first hop to send packets to UE 615-b, and UE 615-b can use the RLC layer and channel configuration for the second hop to relay packets to UE 615-c.

[0136] Figure 7 An example of a process flow 700 supporting one or more aspects of this disclosure for configuring a sidelink DRB for relay communication is shown. In some examples, process flow 700 may implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, process flow 300, process flow 400, process flow 500, and process flow 600. For example, process flow 700 may be executed by UE 715, which may be as described in the reference... Figures 1 to 6 Examples of UE 115, UE 215, UE 315, UE 415, UE 515, and UE 615 are described below. Alternative examples are possible, some of which involve steps performed in a different order than described or not performed at all. In some cases, steps may include additional features not mentioned below, or additional steps may be added.

[0137] At point 705, UE 715-a (source UE or remote UE) can establish a first communication link with UE 715-b (relay UE). Furthermore, UE 715-b can establish a second communication link with UE 715-c (destination UE or target UE). UE 715-b can operate as a relay for communication between UE 715-a and UE 715-c. Communication between UE 715-a and UE 715-c can be associated with an end-to-end communication link.

[0138] At 710, UE 715-a may send signaling indicating traffic load information and an end-to-end QoS profile set associated with the end-to-end communication link. In some examples, UE 715-a may determine a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to the end-to-end communication link, and the traffic load information may include an indication of the mapping. In some examples, UE 715-a may receive signaling indicating the mapping from a network entity, or UE 715-a may determine the mapping based on a pre-configured mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs. Furthermore, in some examples, the traffic load information may include one or more end-to-end QoS flow IDs corresponding to the end-to-end QoS profile set. Additionally or alternatively, the traffic load information may include one or more DRB IDs associated with the end-to-end communication link. In some examples, UE 715-a may send the traffic load information via a PC5-RRC message or a PC5-S message.

[0139] At 720, UE 715-b can split the end-to-end QoS profile set. For example, UE 715-b can identify end-to-end DRBs of end-to-end communication links based on mappings, and for the identified end-to-end DRBs, determine a first portion of the end-to-end QoS profile set and a second portion of the end-to-end QoS profile set. The first portion can be associated with a first communication link, and the second portion can be associated with a second communication link. In some examples, UE 715-b can determine a second RLC layer and channel configuration for the second communication link based on traffic load information, signaling from network entities, or pre-configured RLC layer and channel configuration.

[0140] At 725, UE 715-b may send configuration information for a first portion or a first communication link of the end-to-end communication link to UE 715-a. In one example, the configuration information may include an indication of one or both of an end-to-end QoS profile for the first portion or an end-to-end QoS profile for the second portion. Additionally, the channel configuration information may include a set of end-to-end QoS flow IDs corresponding to the first portion. Alternatively or additionally, the configuration information may include a set of DRB IDs corresponding to the end-to-end QoS profile of the first portion. In some examples, UE 715-b may send the configuration information via a PC5-RRC message or a PC5-S message.

[0141] In some examples, UE 715-a may determine a first RLC layer and channel configuration for a first communication link. In some examples, UE 715-a may determine the first RLC layer and channel configuration based on configuration information received from UE 715-b at 725. In some examples, UE 715-a may send signaling to UE 715-b indicating the first RLC layer and channel configuration, and UE 715-b may determine a second RLC layer and channel configuration based on the first RLC layer and channel configuration. In some examples, UE 715-b may store a first mapping between the first RLC layer and channel configuration and the first communication link, and a second mapping between the second RLC layer and channel configuration and the second communication link.

[0142] In another example, UE 715-b may determine the first RLC layer and channel configuration based on the end-to-end QoS profile in Part 1, and send signaling indicating the first RLC layer and channel configuration to UE 715-a. In some examples, after receiving the first RLC layer and channel configuration, UE 715-a may update the first RLC layer and channel configuration based on the configuration information. UE 715-a may update (or modify) the first RLC layer and channel configuration by sending the first RLC layer and channel configuration received from UE 715-b along with the configuration information to the network entity and by receiving the updated (or modified) first RLC layer and channel configuration. In some examples, the modified first RLC layer and channel configuration may be the same as or different from the first RLC layer and channel configuration received by UE 715-a from UE 715-b. In some examples, the first RLC layer and channel configuration may be for an end-to-end QoS flow ID set or a DRB ID set.

[0143] In some examples, UE 715-a may determine the first RLC layer and channel configuration, as well as the second RLC layer and channel configuration, for the second communication link based on configuration information received from UE 715-b at 725. Furthermore, UE 715-a may send signaling to UE 715-b indicating an index of the end-to-end DRB and one or both of the second RLC layer and channel configuration. The second RLC layer and channel configuration may be mapped to the end-to-end DRB. In some examples, UE 715-b may update the second RLC layer and channel configuration based on the received second RLC layer and channel configuration. UE 715-b may update (or modify) the second RLC layer and channel configuration by sending the second RLC layer and channel configuration received from UE 715-a to a network entity and by receiving an updated (or modified) second RLC layer and channel configuration. In some examples, the modified second RLC layer and channel configuration may be the same as or different from the second RLC layer and channel configuration received by UE 715-b from UE 715-a.

[0144] At 730, UE 715-a can communicate with UE 715-c. For example, UE 715-a can send packets to UE 715-b based on the first RLC layer and channel configuration, and UE 715-b can relay packets to UE 715-c based on the second RLC layer and channel configuration.

[0145] Figure 8A block diagram 800 of a device 805 supporting techniques for configuring a sidelink DRB for relay communication, according to one or more aspects of this disclosure, is shown. Device 805 may be an example of various aspects of a UE 115 as described herein. Device 805 may include a receiver 810, a transmitter 815, and a communication manager 820. Device 805, or one or more components of device 805 (e.g., receiver 810, transmitter 815, and communication manager 820), may include at least one processor that may be coupled to at least one memory to individually or jointly support or implement the described techniques. Each of these components may communicate with each other (e.g., via one or more buses).

[0146] Receiver 810 may provide components 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 associated with technologies used to configure sidelink DRBs for relay communications). The information may be delivered to other components of device 805. Receiver 810 may utilize a single antenna or a collection of antennas.

[0147] Transmitter 815 may provide components for transmitting signals generated by other components of device 805. For example, transmitter 815 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, and information channels associated with technologies used to configure sidelink DRBs for relay communications). In some examples, transmitter 815 may be co-located with receiver 810 in a transceiver module. Transmitter 815 may utilize a single antenna or a collection of multiple antennas.

[0148] The communication manager 820, receiver 810, transmitter 815, or various combinations thereof, or various components thereof, may be examples of components used to perform various aspects of the techniques described herein for configuring a sidelink DRB for relay communication. For example, the communication manager 820, receiver 810, transmitter 815, or various combinations thereof, or components thereof, may be able to perform one or more of the functions described herein.

[0149] In some examples, the communication manager 820, receiver 810, transmitter 815, or various combinations or components thereof may be implemented in hardware (e.g., in communication management circuitry). The hardware may include at least one of the following: a processor, digital signal processor (DSP), central processing unit (CPU), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, microcontroller, discrete gate or transistor logic device, discrete hardware component, or any combination thereof, configured as or otherwise individually or collectively to support components for performing the functions described herein. In some examples, at least one processor and at least one memory coupled to said at least one processor may be configured to perform one or more of the functions described herein (e.g., instructions stored in at least one memory are executed individually or collectively by one or more processors).

[0150] Additionally or alternatively, the communication manager 820, receiver 810, transmitter 815, or various combinations or components thereof may be implemented in code executed by at least one processor (e.g., as communication management software or firmware). If implemented in code executed by at least one processor, the functionality of the communication manager 820, receiver 810, transmitter 815, or various combinations or components thereof may be performed by any combination of a general-purpose processor, DSP, CPU, ASIC, FPGA, microcontroller, or these or other programmable logic devices (e.g., configured as or otherwise individually or collectively to support components for performing the functions described in this disclosure).

[0151] In some examples, the communication manager 820 may be configured to use or otherwise cooperate with the receiver 810, transmitter 815, or both to perform various operations (e.g., receiving, acquiring, monitoring, outputting, transmitting). For example, the communication manager 820 may receive information from the receiver 810, transmit information to the transmitter 815, or be integrated with the receiver 810, transmitter 815, or both to acquire information, output information, or perform various other operations as described herein.

[0152] The communication manager 820 may support wireless communication according to examples disclosed herein. For example, the communication manager 820 may be capable of, configured to, or operable to support components for establishing a first communication link with a second UE, which operates as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link. The communication manager 820 may be capable of, configured to, or operable to support components for sending a first message to the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link. The communication manager 820 may be capable of, configured to, or operable to support components for receiving a second message from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0153] Additionally or alternatively, the communication manager 820 may support wireless communication according to examples disclosed herein. For example, the communication manager 820 may be capable of, configured to, or operable to support components for establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the second UE and the third UE is associated with an end-to-end communication link. The communication manager 820 may be capable of, configured to, or operable to support components for receiving a first message from the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link. The communication manager 820 may be capable of, configured to, or operable to support components for sending a second message to the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0154] By including or configuring a communication manager 820 according to examples as described herein, device 805 (e.g., controlling receiver 810, transmitter 815, communication manager 820, or a combination thereof, or at least one processor otherwise coupled to them) can support techniques for more efficient utilization of communication resources and extended sidelink communication coverage. For example, the techniques supported by the described communication manager 820 can enable enhanced coordination of link configurations (e.g., RLC layer and channel configuration) to ensure end-to-end QoS requirements are met for relay communications.

[0155] Figure 9A block diagram 900 of a device 905 supporting techniques for configuring a sidelink DRB for relay communication, according to one or more aspects of this disclosure, is shown. Device 905 may be an example of aspects of device 805 or UE 115 as described herein. Device 905 may include a receiver 910, a transmitter 915, and a communication manager 920. Device 905, or one or more components of device 905 (e.g., receiver 910, transmitter 915, and communication manager 920), may include at least one processor coupled to at least one memory to support the described techniques. Each of these components may communicate with each other (e.g., via one or more buses).

[0156] Receiver 910 may provide components 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 associated with technologies used to configure sidelink DRBs for relay communications). The information may be delivered to other components of device 905. Receiver 910 may utilize a single antenna or a collection of antennas.

[0157] Transmitter 915 may provide components for transmitting signals generated by other components of device 905. For example, transmitter 915 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, and information channels associated with technologies used to configure sidelink DRBs for relay communications). In some examples, transmitter 915 may be co-located with receiver 910 in a transceiver module. Transmitter 915 may utilize a single antenna or a collection of multiple antennas.

[0158] Device 905 or its various components may be examples of parts for performing various aspects of the techniques described herein for configuring a sidelink DRB for relay communication. For example, communication manager 920 may include establishment component 925, service information component 930, channel configuration component 935, or any combination thereof. Communication manager 920 may be examples of aspects of communication manager 820 as described herein. In some examples, communication manager 920 or its various components may be configured to use or otherwise cooperate with receiver 910, transmitter 915, or both to perform various operations (e.g., receiving, acquiring, monitoring, outputting, transmitting). For example, communication manager 920 may receive information from receiver 910, transmit information to transmitter 915, or be integrated in combination with receiver 910, transmitter 915, or both to acquire information, output information, or perform various other operations as described herein.

[0159] Communication manager 920 may support wireless communication according to examples disclosed herein. Establishment component 925 is capable of, configured to, or operable to support components for establishing a first communication link with a second UE, which operates as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link. Service information component 930 is capable of, configured to, or operable to support components for sending a first message to the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link. Channel configuration component 935 is capable of, configured to, or operable to support components for receiving a second message from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0160] Additionally or alternatively, the communication manager 920 may support wireless communication according to examples disclosed herein. The establishment component 925 is capable of, configured to, or operable to support components for establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link. The service information component 930 is capable of, configured to, or operable to support components for receiving a first message from the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link. The channel configuration component 935 is capable of, configured to, or operable to support components for sending a second message to the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0161] Figure 10A block diagram 1000 of a communication manager 1020 supporting techniques for configuring a sidelink DRB for relay communication, according to one or more aspects of this disclosure, is shown. The communication manager 1020 may be an example of a communication manager 820, a communication manager 920, or aspects thereof as described herein. The communication manager 1020 or its various components may be examples of parts for performing various aspects of techniques for configuring a sidelink DRB for relay communication as described herein. For example, the communication manager 1020 may include an establishment component 1025, a service information component 1030, a channel configuration component 1035, a mapping component 1040, a communication component 1045, a DRB component 1050, a per-hop QoS profile component 1055, a relay component 1060, or any combination thereof. Each of these components, or its components or sub-components (e.g., one or more processors, one or more memories), may communicate directly or indirectly with each other (e.g., via one or more buses).

[0162] Communication manager 1020 may support wireless communication according to examples disclosed herein. Establishment component 1025 is capable of, configured to, or operable to support components for establishing a first communication link with a second UE, which operates as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link. Service information component 1030 is capable of, configured to, or operable to support components for sending a first message to the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link. Channel configuration component 1035 is capable of, configured to, or operable to support components for receiving a second message from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0163] In some examples, the mapping component 1040 is capable of, configured to, or operable to support components for determining a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to end-to-end communication links, wherein the end-to-end service information includes an indication of the mapping.

[0164] In some examples, the mapping component 1040 is capable of, configured to, or operable to support components for receiving a third message from a network entity, the third message indicating a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs, wherein the mapping is determined based on the third message. In some examples, the mapping is determined based on a pre-configured mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs.

[0165] In some examples, the per-hop QoS profile component 1055 is capable of, configured to, or operable to support components for determining the end-to-end QoS profile of the first portion based on configuration information indicating the end-to-end QoS profile for the first portion of the first communication link in an end-to-end QoS profile set and one or more corresponding end-to-end QoS flow IDs for the first communication link. In some examples, the communication component 1045 is capable of, configured to, or operable to support components for communicating with a third UE via a second UE based on a first RLC layer and channel configuration for the first communication link, the first RLC layer and channel configuration being mapped to the end-to-end DRB of the end-to-end communication link.

[0166] In some examples, channel configuration component 1035 is capable of, configured to, or operable to support components for determining the first RLC layer and channel configuration for the first communication link based on configuration information indicating the first RLC layer and channel configuration for the first communication link, the first RLC layer and channel configuration being mapped to the end-to-end DRB of the end-to-end communication link. In some examples, communication component 1045 is capable of, configured to, or operable to support components for communicating with a third UE via a second UE based on the first RLC layer and channel configuration.

[0167] In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for determining a first RLC layer and channel configuration for a first communication link and a second RLC layer and channel configuration for a second communication link between a second UE and a third UE, wherein the first RLC layer and channel configuration and the second RLC layer and channel configuration are based on configuration information and a mapping between one or more end-to-end QoS flow IDs and end-to-end DRBs for the end-to-end communication link. In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for sending a fourth message to the second UE, the fourth message indicating an index of the end-to-end DRB and the second RLC layer and channel configuration for the second communication link, wherein the second RLC layer and channel configuration is mapped to the end-to-end DRB. In some examples, the communication component 1045 is capable of, configured to, or operable to support components for communicating with the third UE via the second UE based on the first RLC layer and channel configuration.

[0168] In some examples, the configuration information includes an indication of an end-to-end QoS profile from a first part of the end-to-end QoS profile set and a set of end-to-end QoS flow IDs corresponding to the first part of the end-to-end QoS profile.

[0169] In some examples, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to a set of end-to-end QoS profiles.

[0170] In some examples, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to an end-to-end QoS profile set or one or more DRB IDs associated with an end-to-end communication link. In some examples, configuration information includes an indication of an end-to-end QoS profile from a first portion of the end-to-end QoS profile set, and also includes a set of end-to-end QoS flow IDs corresponding to the first portion of the end-to-end QoS profile or a set of DRB IDs corresponding to the first portion of the end-to-end QoS profile.

[0171] In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for determining a first RLC layer and channel configuration for a first communication link, wherein the first RLC layer and channel configuration are for an end-to-end QoS flow ID set or DRB ID set. In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for sending a fifth message to a second UE indicating the first RLC layer and channel configuration. In some examples, the communication component 1045 is capable of, configured to, or operable to support components for communicating with a third UE via the second UE based on the first RLC layer and channel configuration.

[0172] In some examples, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to a set of end-to-end QoS profiles or one or more DRB IDs associated with an end-to-end communication link. In some examples, configuration information includes an indication of a first RLC layer and channel configuration for a first communication link, which also indicates a set of end-to-end QoS flow IDs or a set of DRB IDs associated with the first RLC layer and channel configuration.

[0173] In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for determining a first RLC layer and channel configuration for a first communication link based on an indication of a first RLC layer and channel configuration for an end-to-end QoS flow ID set or DRB ID set. In some examples, the communication component 1045 is capable of, configured to, or operable to support components for communicating with a third UE via a second UE based on the first RLC layer and channel configuration.

[0174] In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for sending a sixth message to a network entity, the sixth message including an indication of a first RLC layer and channel configuration, and an end-to-end QoS profile in a first portion. In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for receiving a seventh message from a network entity, the seventh message indicating a modified RLC layer and channel configuration different from the first RLC layer and channel configuration indicated by a second UE, wherein the determined first RLC layer and channel configuration includes the modified RLC layer and channel configuration based on the seventh message.

[0175] In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for sending a sixth message to a network entity, the sixth message including an indication of a first RLC layer and channel configuration, and an end-to-end QoS profile in a first portion. In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for receiving a seventh message from a network entity, the seventh message indicating an unmodified RLC layer and channel configuration identical to the first RLC layer and channel configuration indicated by the second UE, wherein the determined first RLC layer and channel configuration includes the unmodified RLC layer and channel configuration.

[0176] In some examples, the configuration information also includes indications of the end-to-end QoS profiles in the first and second parts. In some examples, the first message, the second message, or both include PC5 radio resource control messages or PC5 signaling messages.

[0177] Additionally or alternatively, the communication manager 1020 may support wireless communication according to examples disclosed herein. In some examples, the establishment component 1025 is capable of, configured to, or operable to support components for establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the second UE and the third UE is associated with an end-to-end communication link. In some examples, the service information component 1030 is capable of, configured to, or operable to support components for receiving a first message from the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link. In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for sending a second message to the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0178] In some examples, end-to-end service information includes an indication of a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to end-to-end communication links, and DRB component 1050 is capable of, configured to, or operable to support components for identifying end-to-end DRBs of end-to-end communication links based on the mapping. In some examples, end-to-end service information includes an indication of a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to end-to-end communication links, and per-hop QoS profile component 1055 is capable of, configured to, or operable to support components for determining a first portion of an end-to-end QoS profile and a second portion of an end-to-end QoS profile in a set of end-to-end QoS profiles for the identified end-to-end DRBs, wherein the first portion of the end-to-end QoS profile is associated with a first communication link, and the second portion of the end-to-end QoS profile is associated with a second communication link between a first UE and a third UE.

[0179] In some examples, the channel configuration component 1035 is capable of, can be configured to, or is operable to support components for determining a first RLC layer and channel configuration for a first communication link, or a second RLC layer and channel configuration for a second communication link, or both.

[0180] In some examples, the configuration information includes an indication of the end-to-end QoS profile for the first part and one or more corresponding end-to-end QoS flow IDs for the first communication link, and the relay component 1060 is capable of, configured to, or operable to support components for relaying signaling between the second UE and the third UE based on the second RLC layer and channel configuration for the second communication link.

[0181] In some examples, the configuration information includes an indication of a first RLC layer and channel configuration for a first communication link, and the relay component 1060 is capable of, configured to, or operable to support components for relaying signaling between a second UE and a third UE based on a second RLC layer and channel configuration for a second communication link.

[0182] In some examples, the first RLC layer and channel configuration or the second RLC layer and channel configuration or both are determined based on signaling from network entities, or one or more pre-configured RLC layer and channel configurations, or any combination thereof.

[0183] In some examples, end-to-end service information includes one or more QoS flow IDs corresponding to an end-to-end QoS profile set, and each-hop QoS profile component 1055 is capable of, configured to, or operable to support components for determining an end-to-end QoS profile of a first portion and a second portion of the end-to-end QoS profile in the end-to-end QoS profile set based on the end-to-end QoS profile set and one or more QoS flow IDs, wherein the end-to-end QoS profile of the first portion is associated with a first communication link, and the end-to-end QoS profile of the second portion is associated with a second communication link between a first UE and a third UE, wherein the configuration information includes an indication of the end-to-end QoS profile of the first portion and a set of end-to-end QoS flow IDs corresponding to the end-to-end QoS profile of the first portion.

[0184] In some examples, channel configuration component 1035 is capable of, configured to, or operable to support components for receiving a fourth message from a second UE, the fourth message indicating an index of the end-to-end DRB of the end-to-end communication link and an indication of a second RLC layer and channel configuration for the second communication link, wherein the second RLC layer and channel configuration are mapped to the end-to-end DRB. In some examples, channel configuration component 1035 is capable of, configured to, or operable to support components for determining the second RLC layer and channel configuration based on the indication of the second RLC layer and channel configuration. In some examples, relay component 1060 is capable of, configured to, or operable to support components for relaying signaling between a second UE and a third UE based on the second RLC layer and channel configuration.

[0185] In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for sending an eighth message to a network entity, including an indication of a second RLC layer and channel configuration. In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for receiving a ninth message from a network entity, the ninth message indicating a modified RLC layer and channel configuration different from the second RLC layer and channel configuration indicated by the second UE, wherein the determined second RLC layer and channel configuration includes the modified RLC layer and channel configuration.

[0186] In some examples, the eighth message also includes an indication of an end-to-end QoS profile for the second part of the second communication link.

[0187] In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for sending an eighth message to a network entity, including an indication of a second RLC layer and channel configuration. In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for receiving a ninth message from a network entity, the ninth message indicating an unmodified RLC layer and channel configuration identical to the second RLC layer and channel configuration indicated by the second UE, wherein the determined second RLC layer and channel configuration includes the unmodified RLC layer and channel configuration.

[0188] In some examples, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to an end-to-end QoS profile set or one or more DRB IDs associated with an end-to-end communication link, and the per-hop QoS profile component 1055 is capable of, configured to, or operable to support components for determining an end-to-end QoS profile of a first portion and an end-to-end QoS profile of a second portion in the end-to-end QoS profile set, wherein the end-to-end QoS profile of the first portion is associated with a first communication link, and the end-to-end QoS profile of the second portion is associated with a second communication link between a first UE and a third UE, and wherein the configuration information includes an indication of the end-to-end QoS profile of the first portion, and also indicates a first set of end-to-end QoS flow IDs corresponding to the end-to-end QoS profile of the first portion or a set of DRB IDs corresponding to the end-to-end QoS profile of the first portion.

[0189] In some examples, channel configuration component 1035 is capable of, configured to, or operable to support components for receiving a fifth message from a second UE, the fifth message indicating a first RLC layer and channel configuration for a first communication link, wherein the first RLC layer and channel configuration are based on a first end-to-end QoS flow ID set or a DRB ID set. In some examples, channel configuration component 1035 is capable of, configured to, or operable to support components for determining a second RLC layer and channel configuration for a second communication link based on the first RLC layer and channel configuration, the end-to-end QoS profile of the second portion, the DRB ID set, or any combination thereof. In some examples, relay component 1060 is capable of, configured to, or operable to support components for relaying signaling between a second UE and a third UE based on the second RLC layer and channel configuration.

[0190] In some examples, to support the determination of the second RLC layer and channel configuration, the channel configuration component 1035 is capable of, can be configured to, or is operable to support the determination of the second RLC layer and channel configuration for the second communication link based on the first RLC layer and channel configuration and the end-to-end QoS profile of the second part for the end-to-end QoS flow for the second part.

[0191] In some examples, the per-hop QoS profile component 1055 is capable of, configured to, or operable to support a component for sending a tenth message to a network entity indicating the end-to-end QoS profile of the second part. In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support a component for receiving an eleventh message from a network entity, the eleventh message indicating a second RLC layer and channel configuration based on the end-to-end QoS profile of the second part, wherein the second RLC layer and channel configuration are determined based on the eleventh message.

[0192] In some examples, the mapping component 1040 is capable of, configured to, or operable to support components for storing a first mapping between a first RLC layer and channel configuration and a first communication link, and a second mapping between a second RLC layer and channel configuration and a second communication link.

[0193] In some examples, in order to support the determination of the second RLC layer and channel configuration, the channel configuration component 1035 is capable of, can be configured to, or is operable to support components for determining the second RLC layer and channel configuration for the second communication link against a set of DRB IDs.

[0194] In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for receiving a twelfth message from a network entity indicating a second RLC layer and channel configuration, wherein the second RLC layer and channel configuration are determined based on the twelfth message.

[0195] In some examples, end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to a set of end-to-end QoS profiles or one or more DRB IDs associated with an end-to-end communication link. In some examples, configuration information includes an indication of a first RLC layer and channel configuration for a first communication link, which also indicates a set of end-to-end QoS flow IDs or a set of DRB IDs associated with the first RLC layer and channel configuration.

[0196] In some examples, the per-hop QoS profile component 1055 is capable of, configured to, or operable to support components for determining a first portion of the end-to-end QoS profile and a second portion of the end-to-end QoS profile in a set of end-to-end QoS profiles, wherein the first portion of the end-to-end QoS profile is associated with a first communication link, and the second portion of the end-to-end QoS profile is associated with a second communication link between a first UE and a third UE. In some examples, the channel configuration component 1035 is capable of, configured to, or operable to support components for determining a first RLC layer and channel configuration for the first communication link and a second RLC layer and channel configuration for the second communication link. In some examples, the relay component 1060 is capable of, configured to, or operable to support components for relaying signaling between a second UE and a third UE based on the second RLC layer and channel configuration.

[0197] In some examples, the first RLC layer and channel configuration or the second RLC layer and channel configuration or both are determined based on signaling from network entities, or one or more pre-configured RLC layer and channel configurations, or any combination thereof.

[0198] In some examples, the configuration information also includes indications of the end-to-end QoS profiles in the first and second parts. In some examples, the first message, the second message, or both include PC5 radio resource control messages or PC5 signaling messages.

[0199] Figure 11 A diagram of a system 1100 including a device 1105 supporting technology for configuring a sidelink DRB for relay communication, according to one or more aspects of this disclosure, is shown. Device 1105 may be an example of device 805, device 905, or UE 115 as described herein, or a component including such devices. Device 1105 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof (e.g., wirelessly). Device 1105 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, such as a communication manager 1120, an input / output (I / O) controller 1110, a transceiver 1115, an antenna 1125, at least one memory 1130, code 1135, and at least one processor 1140. These components may communicate electronically or be coupled in other ways (e.g., operational ground, communication ground, functional ground, electronic ground, electrical ground) via one or more buses (e.g., bus 1145).

[0200] I / O controller 1110 manages the input and output signals of device 1105. I / O controller 1110 can also manage peripheral devices not integrated into device 1105. In some cases, I / O controller 1110 may represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1110 may utilize an operating system such as iOS. ® ANDROID ® MS-DOS ® MS-WINDOWS ® OS / 2 ® UNIX ® LINUX ® Or another known operating system. Additionally or alternatively, the I / O controller 1110 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 1110 may be implemented as part of one or more processors, such as at least one processor 1140. In some cases, a user may interact with the device 1105 via the I / O controller 1110 or via hardware components controlled by the I / O controller 1110.

[0201] In some cases, device 1105 may include a single antenna 1125. However, in other cases, device 1105 may have more than one antenna 1125, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. Transceiver 1115 may communicate bidirectionally via one or more antennas 1125 as described herein, or via a wired or wireless link. For example, transceiver 1115 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. Transceiver 1115 may also include a modem for: modulating packets; providing the modulated packets to one or more antennas 1125 for transmission; and demodulating packets received from one or more antennas 1125. Transceiver 1115, or transceiver 1115 and one or more antennas 1125, may be an example of transmitter 815, transmitter 915, receiver 810, receiver 910, or any combination thereof or components thereof as described herein.

[0202] At least one memory 1130 may include random access memory (RAM) and read-only memory (ROM). At least one memory 1130 may store computer-readable, computer-executable code 1135, including instructions that, when executed by at least one processor 1140, cause device 1105 to perform the various functions described herein. Code 1135 may be stored in a non-transitory computer-readable medium, such as system memory or another type of memory. In some cases, code 1135 may not be directly executable by at least one processor 1140, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, among other things, at least one memory 1130 may also include a basic I / O system (BIOS) that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0203] At least one processor 1140 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, at least one processor 1140 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into at least one processor 1140. At least one processor 1140 may be configured to execute computer-readable instructions stored in memory (e.g., at least one memory 1130) to cause device 1105 to perform various functions (e.g., functions or tasks supporting techniques for configuring a sidelink DRB for relay communication). For example, device 1105 or components of device 1105 may include at least one processor 1140 and at least one memory 1130 coupled to or coupled to at least one processor 1140, wherein at least one processor 1140 and at least one memory 1130 are configured to perform the various functions described herein. In some examples, at least one processor 1140 may include multiple processors, and at least one memory 1130 may include multiple memories. One or more of a plurality of processors may be coupled to one or more of a plurality of memories, which may be configured individually or collectively to perform the various functions described herein. In some examples, at least one processor 1140 may be a component of a processing system, which may refer to a machine (such as a series of machines), circuitry (including, for example, one or both of processor circuitry (which may include at least one processor 1140) and memory circuitry (which may include at least one memory 1130)) or component that receives or receives input and processes the input 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. Thus, at least one processor 1140 or a processing system including at least one processor 1140 may be configured, configurable, or operable to cause device 1105 to perform one or more of the functions described herein. Furthermore, as described herein, “configured to,” “configurable to,” and “operable to” are used interchangeably and may be associated with the ability to perform one or more of the functions described herein when executing code stored in at least one memory 1130 or otherwise.

[0204] The communication manager 1120 may support wireless communication according to examples disclosed herein. For example, the communication manager 1120 may be capable of, configured to, or operable to support components for establishing a first communication link with a second UE, which operates as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link. The communication manager 1120 may be capable of, configured to, or operable to support components for sending a first message to the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link. The communication manager 1120 may be capable of, configured to, or operable to support components for receiving a second message from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0205] Additionally or alternatively, the communication manager 1120 may support wireless communication according to examples disclosed herein. For example, the communication manager 1120 may be capable of, configured to, or operable to support components for establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the second UE and the third UE is associated with an end-to-end communication link. The communication manager 1120 may be capable of, configured to, or operable to support components for receiving a first message from the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link. The communication manager 1120 may be capable of, configured to, or operable to support components for sending a second message to the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0206] By including or configuring a communication manager 1120 according to an example as described herein, device 1105 can support techniques for improving communication reliability, more efficient use of communication resources, and improved coordination between devices. For example, the techniques supported by the described communication manager 1120 can enable enhanced coordination of link configurations (e.g., RLC layer and channel configuration) to ensure end-to-end QoS requirements are met for relay communication between two UEs 115.

[0207] In some examples, the communication manager 1120 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using transceiver 1115, one or more antennas 1125, or any combination thereof, or otherwise cooperating with them. Although the communication manager 1120 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1120 may be supported by or executed by at least one processor 1140, at least one memory 1130, code 1135, or any combination thereof. For example, code 1135 may include instructions that can be executed by at least one processor 1140 to cause device 1105 to perform various aspects of the techniques described herein for configuring a sidelink DRB for relay communication, or at least one processor 1140 and at least one memory 1130 may be otherwise configured to perform or support such operations individually or jointly.

[0208] Figure 12 A flowchart illustrating a method 1200 for configuring a sidelink DRB for relay communication, according to various aspects of this disclosure, is shown. Operation of method 1200 can be implemented by a UE or its components as described herein. For example, operation of method 1200 can be achieved by, as referenced... Figures 1 to 11 The UE 115 described herein is used to perform this function. In some examples, the UE can execute a set of instructions to control the functional elements of the UE to perform the described function. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described function.

[0209] At 1205, the method may include: establishing a first communication link with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link. The operation of 1205 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1205 may be provided by reference to [reference needed]. Figure 10 The described component 1025 is used for execution.

[0210] At 1210, the method may include: sending a first message to a second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link. The operation of 1210 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1210 may be provided by reference to... Figure 10 The described business information component 1030 is used to execute this.

[0211] At 1215, the method may include: receiving a second message from a second UE, the second message indicating configuration information for at least a first portion of an end-to-end communication link, the first portion of the end-to-end communication link including a first communication link between the first UE and the second UE. Operation of 1215 may be performed according to examples as disclosed herein. In some examples, aspects of operation of 1215 may be provided by reference to... Figure 10 The described channel configuration component 1035 is used to perform this.

[0212] Figure 13 A flowchart illustrating a method 1300 for configuring a sidelink DRB for relay communication, according to various aspects of this disclosure, is shown. Operation of method 1300 can be implemented by a UE or its components as described herein. For example, operation of method 1300 can be achieved by, as referenced... Figures 1 to 11 The UE 115 described herein is used to perform this function. In some examples, the UE can execute a set of instructions to control the functional elements of the UE to perform the described function. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described function.

[0213] At 1305, the method may include: establishing a first communication link with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link. The operation of 1305 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1305 may be provided by reference to [reference needed]. Figure 10 The described component 1025 is used for execution.

[0214] At 1310, the method may include: determining a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to the end-to-end communication links. The operation of 1310 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1310 may be derived from references... Figure 10 The described mapping component 1040 is used for execution.

[0215] At 1315, the method may include: sending a first message to a second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with an end-to-end communication link, wherein the end-to-end service information includes an indication of a mapping. The operation of 1315 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1315 may be provided by reference to [reference needed]. Figure 10 The described business information component 1030 is used to execute this.

[0216] At 1320, the method may include: receiving a second message from a second UE, the second message indicating configuration information for at least a first portion of an end-to-end communication link, the first portion of the end-to-end communication link including a first communication link between the first UE and the second UE. Operation of 1320 may be performed according to examples as disclosed herein. In some examples, aspects of operation of 1320 may be provided by reference to [reference needed]. Figure 10 The described channel configuration component 1035 is used to perform this.

[0217] Figure 14 A flowchart illustrating a method 1400 for configuring a sidelink DRB for relay communication, according to various aspects of this disclosure, is shown. Operation of method 1400 can be implemented by a UE (e.g., a first UE) or its components as described herein. For example, operation of method 1400 can be implemented by, as referenced... Figures 1 to 11 The UE 115 described herein is used to perform this function. In some examples, the UE can execute a set of instructions to control the functional elements of the UE to perform the described function. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described function.

[0218] At 1405, the method may include: establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, and wherein the communication between the second UE and the third UE is associated with an end-to-end communication link. The operation of 1405 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1405 may be provided by reference to [reference needed]. Figure 10 The described component 1025 is used for execution.

[0219] At 1410, the method may include: receiving a first message from a second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with an end-to-end communication link. Operation of 1410 may be performed according to examples as disclosed herein. In some examples, aspects of operation of 1410 may be provided by reference to... Figure 10 The described business information component 1030 is used to execute this.

[0220] At 1415, the method may include: sending a second message to a second UE, the second message indicating configuration information for at least a first portion of an end-to-end communication link, the first portion of the end-to-end communication link including a first communication link between the first UE and the second UE. Operation of 1415 may be performed according to examples as disclosed herein. In some examples, aspects of operation of 1415 may be provided by reference to... Figure 10 The described channel configuration component 1035 is used to perform this.

[0221] Figure 15A flowchart illustrating a method 1500 for configuring a sidelink DRB for relay communication, according to various aspects of this disclosure, is shown. Operation of method 1500 can be implemented by a UE (e.g., a first UE) or its components as described herein. For example, operation of method 1500 can be implemented by, as referenced... Figures 1 to 11 The UE 115 described herein is used to perform this function. In some examples, the UE can execute a set of instructions to control the functional elements of the UE to perform the described function. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described function.

[0222] At 1505, the method may include: establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, and wherein the communication between the second UE and the third UE is associated with an end-to-end communication link. The operation of 1505 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1505 may be provided by reference to [reference needed]. Figure 10 The described component 1025 is used for execution.

[0223] At 1510, the method may include: receiving a first message from a second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with an end-to-end communication link. Operation of 1510 may be performed according to examples as disclosed herein. In some examples, aspects of operation of 1510 may be provided by reference to... Figure 10 The described business information component 1030 is used to execute this.

[0224] At 1515, the method may include: identifying an end-to-end DRB of an end-to-end communication link based on a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to the end-to-end communication link. The operation of 1515 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1515 may be derived from references... Figure 10 The described DRB component 1050 is used to perform this.

[0225] At 1520, the method may include: determining, for the identified end-to-end DRB, a first portion of an end-to-end QoS profile and a second portion of an end-to-end QoS profile set, wherein the first portion of the end-to-end QoS profile is associated with a first communication link, and the second portion of the end-to-end QoS profile is associated with a second communication link between a second UE and a third UE. The operation of 1520 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1520 may be derived from references... Figure 10 The per-hop QoS profile component 1055 is described and executed.

[0226] At 1525, the method may include: sending a second message to a second UE, the second message indicating configuration information for at least a first portion of an end-to-end communication link, the first portion of the end-to-end communication link including a first communication link between the first UE and the second UE. Operation of 1525 may be performed according to examples as disclosed herein. In some examples, aspects of operation of 1525 may be provided by reference to [reference needed]. Figure 10 The described channel configuration component 1035 is used to perform this.

[0227] The following provides an overview of the various aspects of this disclosure: Aspect 1: A method for wireless communication at a first UE, the method comprising: establishing a first communication link with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; sending a first message to the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and receiving a second message from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0228] Aspect 2: According to the method of aspect 1, the method further includes: determining a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to the end-to-end communication link, wherein the end-to-end service information includes an indication of the mapping.

[0229] Aspect 3: According to the method of aspect 2, the method further includes: receiving a third message from a network entity, the third message indicating the mapping between the one or more end-to-end QoS flow IDs and the corresponding end-to-end DRBs, wherein the mapping is determined at least in part based on the third message.

[0230] Aspect 4: The method according to any one of Aspects 2 to 3, wherein the mapping is determined at least in part based on a pre-configured mapping between the one or more end-to-end QoS flow IDs and the corresponding end-to-end DRBs.

[0231] Aspect 5: The method according to any one of Aspects 2 to 4, the method further comprising: determining the end-to-end QoS profile of the first part based at least in part on the configuration information indicating an end-to-end QoS profile for a first part of the first communication link in the end-to-end QoS profile set and one or more corresponding end-to-end QoS flow IDs for the first communication link; and communicating with the third UE via the second UE based at least in part on a first RLC layer and channel configuration for the first communication link, the first RLC layer and channel configuration being mapped to an end-to-end DRB of the end-to-end communication link.

[0232] Aspect 6: The method according to any one of Aspects 2 to 5, the method further comprising: determining, at least in part, a first RLC layer and channel configuration for the first communication link based on configuration information indicating a first RLC layer and channel configuration for the first communication link, the first RLC layer and channel configuration being mapped to an end-to-end DRB of the end-to-end communication link; and communicating with the third UE via the second UE at least in part based on the first RLC layer and channel configuration.

[0233] Aspect 7: The method according to any one of Aspects 1 to 6, the method further comprising: determining a first RLC layer and channel configuration for the first communication link and a second RLC layer and channel configuration for a second communication link between the second UE and the third UE, wherein the first RLC layer and channel configuration and the second RLC layer and channel configuration are at least partially based on the configuration information and a mapping between one or more end-to-end QoS flow IDs and end-to-end DRBs of the end-to-end communication link; sending a fourth message to the second UE, the fourth message indicating an index of the end-to-end DRB and the second RLC layer and channel configuration for the second communication link, wherein the second RLC layer and channel configuration is mapped to the end-to-end DRB; and communicating with the third UE via the second UE at least partially based on the first RLC layer and channel configuration.

[0234] Aspect 8: According to the method of aspect 7, wherein the configuration information includes an indication of an end-to-end QoS profile from a first portion of the end-to-end QoS profile set and a set of end-to-end QoS flow IDs corresponding to the end-to-end QoS profile of the first portion.

[0235] Aspect 9: The method according to any one of Aspects 7 to 8, wherein the end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to the end-to-end QoS profile set.

[0236] Aspect 10: The method according to any one of Aspects 1 to 9, wherein the end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to the end-to-end QoS profile set or one or more DRB IDs associated with the end-to-end communication link, and the configuration information includes an indication of an end-to-end QoS profile from a first portion of the end-to-end QoS profile set, and further includes a set of end-to-end QoS flow IDs corresponding to the end-to-end QoS profile of the first portion or a set of DRB IDs corresponding to the end-to-end QoS profile of the first portion.

[0237] Aspect 11: The method according to aspect 10, the method further comprising: determining a first RLC layer and channel configuration for the first communication link, wherein the first RLC layer and channel configuration is for the end-to-end QoS flow ID set or the DRB ID set; sending a fifth message indicating the first RLC layer and channel configuration to the second UE; and communicating with the third UE via the second UE at least in part based on the first RLC layer and channel configuration.

[0238] Aspect 12: The method according to any one of Aspects 1 to 11, wherein the end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to the end-to-end QoS profile set or one or more DRB IDs associated with the end-to-end communication link, and the configuration information includes an indication of a first RLC layer and channel configuration for the first communication link, the configuration information further indicating an end-to-end QoS flow ID set associated with the first RLC layer and channel configuration or a DRB ID set associated with the first RLC layer and channel configuration.

[0239] Aspect 13: The method according to aspect 12, the method further comprising: determining, at least in part, a first RLC layer and channel configuration for the first communication link based on the indication of the first RLC layer and channel configuration for the end-to-end QoS flow ID set or the DRB ID set; and communicating with the third UE via the second UE at least in part based on the first RLC layer and channel configuration.

[0240] Aspect 14: The method according to aspect 13, the method further comprising: sending a sixth message to a network entity, the sixth message including the indication of the first RLC layer and channel configuration and an end-to-end QoS profile of a first portion; and receiving a seventh message from the network entity, the seventh message indicating a modified RLC layer and channel configuration different from the first RLC layer and channel configuration indicated by the second UE, wherein the determined first RLC layer and channel configuration includes at least in part based on the modified RLC layer and channel configuration of the seventh message.

[0241] Aspect 15: The method according to any one of Aspects 13 to 14, the method further comprising: sending a sixth message to a network entity, the sixth message including the indication of the first RLC layer and channel configuration and an end-to-end QoS profile of the first portion; and receiving a seventh message from the network entity, the seventh message indicating an unmodified RLC layer and channel configuration identical to the first RLC layer and channel configuration indicated by the second UE, wherein the determined first RLC layer and channel configuration includes the unmodified RLC layer and channel configuration.

[0242] Aspect 16: The method according to any one of Aspects 12 to 15, wherein the configuration information further includes indications of an end-to-end QoS profile of a first portion and an end-to-end QoS profile of a second portion.

[0243] Aspect 17: The method according to any one of Aspects 1 to 16, wherein the first message, the second message, or both comprise a PC5 RRC message or a PC5 signaling message.

[0244] Aspect 18: A method for wireless communication at a first UE, the method comprising: establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, and wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; receiving a first message from the second UE, the first message indicating end-to-end service information and an end-to-end QoS profile set associated with the end-to-end communication link; and sending a second message to the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

[0245] Aspect 19: The method according to aspect 18, wherein the end-to-end service information includes an indication of a mapping between one or more end-to-end QoS flow IDs and corresponding end-to-end DRBs corresponding to the end-to-end communication link, the method further comprising: identifying an end-to-end DRB of the end-to-end communication link at least in part based on the mapping; and determining, for the identified end-to-end DRB, a first portion of an end-to-end QoS profile and a second portion of an end-to-end QoS profile set, wherein the first portion of the end-to-end QoS profile is associated with the first communication link, and the second portion of the end-to-end QoS profile is associated with a second communication link between the first UE and the third UE.

[0246] Aspect 20: The method according to aspect 19 further includes: determining a first RLC layer and channel configuration for the first communication link, or a second RLC layer and channel configuration for the second communication link, or both.

[0247] Aspect 21: The method according to aspect 20, wherein the configuration information includes an indication of an end-to-end QoS profile for the first portion and one or more corresponding end-to-end QoS flow IDs for the first communication link, the method further comprising: relaying signaling between the second UE and the third UE at least in part based on the second RLC layer and channel configuration for the second communication link.

[0248] Aspect 22: The method according to any one of Aspects 20 to 21, wherein the configuration information includes an indication of the first RLC layer and channel configuration for the first communication link, the method further comprising: relaying signaling between the second UE and the third UE based at least in part on the second RLC layer and channel configuration for the second communication link.

[0249] Aspect 23: The method according to any one of Aspects 20 to 22, wherein the first RLC layer and channel configuration or the second RLC layer and channel configuration or both are determined at least in part based on signaling from a network entity, or one or more pre-configured RLC layer and channel configurations, or any combination thereof.

[0250] Aspect 24: The method according to any one of Aspects 18 to 23, wherein the end-to-end service information includes one or more QoS flow IDs corresponding to the end-to-end QoS profile set, the method further comprising: determining, at least in part, an end-to-end QoS profile of a first portion and an end-to-end QoS profile of a second portion of the end-to-end QoS profile set based on the end-to-end QoS profile set and the one or more QoS flow IDs, wherein the end-to-end QoS profile of the first portion is associated with the first communication link, and the end-to-end QoS profile of the second portion is associated with a second communication link between the first UE and the third UE, wherein the configuration information includes an indication of the end-to-end QoS profile of the first portion and a set of end-to-end QoS flow IDs corresponding to the end-to-end QoS profile of the first portion.

[0251] Aspect 25: The method according to aspect 24, the method further comprising: receiving a fourth message from the second UE, the fourth message indicating an index of an end-to-end DRB of the end-to-end communication link and an indication of a second RLC layer and channel configuration for the second communication link, wherein the second RLC layer and channel configuration is mapped to the end-to-end DRB; determining the second RLC layer and channel configuration based at least in part on the indication of the second RLC layer and channel configuration; and relaying signaling between the second UE and the third UE based at least in part on the second RLC layer and channel configuration.

[0252] Aspect 26: The method according to aspect 25, the method further comprising: sending an eighth message to a network entity, the eighth message including the indication of the second RLC layer and channel configuration; and receiving a ninth message from the network entity, the ninth message indicating a modified RLC layer and channel configuration different from the second RLC layer and channel configuration indicated by the second UE, wherein the determined second RLC layer and channel configuration includes the modified RLC layer and channel configuration.

[0253] Aspect 27: According to the method of aspect 26, the eighth message further includes an indication of an end-to-end QoS profile for the second portion of the second communication link.

[0254] Aspect 28: The method according to any one of Aspects 25 to 27, the method further comprising: sending an eighth message to a network entity, the eighth message including the indication of the second RLC layer and channel configuration; and receiving a ninth message from the network entity, the ninth message indicating an unmodified RLC layer and channel configuration identical to the second RLC layer and channel configuration indicated by the second UE, wherein the determined second RLC layer and channel configuration includes the unmodified RLC layer and channel configuration.

[0255] Aspect 29: The method according to any one of Aspects 18 to 28, wherein the end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to the end-to-end QoS profile set or one or more DRB IDs associated with the end-to-end communication link, the method further comprising: determining an end-to-end QoS profile of a first portion and an end-to-end QoS profile of a second portion in the end-to-end QoS profile set, wherein the end-to-end QoS profile of the first portion is associated with the first communication link, and the end-to-end QoS profile of the second portion is associated with a second communication link between the first UE and the third UE, and wherein the configuration information includes an indication of the end-to-end QoS profile of the first portion, and also indicates a first set of end-to-end QoS flow IDs corresponding to the end-to-end QoS profile of the first portion or a set of DRB IDs corresponding to the end-to-end QoS profile of the first portion.

[0256] Aspect 30: The method according to aspect 29, the method further comprising: receiving a fifth message from the second UE, the fifth message indicating a first RLC layer and channel configuration for the first communication link, wherein the first RLC layer and channel configuration is based at least in part on the first end-to-end QoS flow ID set or the DRB ID set; determining a second RLC layer and channel configuration for the second communication link based at least in part on the first RLC layer and channel configuration, the second portion of the end-to-end QoS profile, the DRB ID set, or any combination thereof; and relaying signaling between the second UE and the third UE based at least in part on the second RLC layer and channel configuration.

[0257] Aspect 31: According to the method of aspect 30, wherein the end-to-end service information includes the first end-to-end QoS flow ID set, and wherein determining the second RLC layer and channel configuration includes: for the end-to-end QoS flow of the second portion, determining the second RLC layer and channel configuration for the second communication link based at least in part on the first RLC layer and channel configuration and the end-to-end QoS profile of the second portion.

[0258] Aspect 32: The method according to aspect 31, the method further comprising: sending a tenth message to a network entity indicating an end-to-end QoS profile of the second portion; and receiving an eleventh message from the network entity, the eleventh message indicating a second RLC layer and channel configuration based at least in part on the end-to-end QoS profile of the second portion, wherein the second RLC layer and channel configuration are determined at least in part based on the eleventh message.

[0259] Aspect 33: The method according to any one of aspects 30 to 32, the method further comprising: storing a first mapping between the first RLC layer and channel configuration and the first communication link and a second mapping between the second RLC layer and channel configuration and the second communication link.

[0260] Aspect 34: The method according to any one of Aspects 30 to 33, wherein the end-to-end service information includes the DRB ID set, and wherein determining the second RLC layer and channel configuration includes: determining the second RLC layer and channel configuration for the second communication link for the DRB ID set.

[0261] Aspect 35: The method according to aspect 34, the method further comprising: receiving from a network entity a twelfth message indicating the second RLC layer and channel configuration, wherein the second RLC layer and channel configuration are determined at least in part based on the twelfth message.

[0262] Aspect 36: The method according to any one of Aspects 18 to 35, wherein the end-to-end service information includes one or more end-to-end QoS flow IDs corresponding to the end-to-end QoS profile set or one or more DRB IDs associated with the end-to-end communication link, and the configuration information includes an indication of a first RLC layer and channel configuration for the first communication link, the configuration information further indicating an end-to-end QoS flow ID set associated with the first RLC layer and channel configuration or a DRB ID set associated with the first RLC layer and channel configuration.

[0263] Aspect 37: The method according to aspect 36, the method further comprising: determining an end-to-end QoS profile of a first portion and an end-to-end QoS profile of a second portion in the end-to-end QoS profile set, wherein the end-to-end QoS profile of the first portion is associated with the first communication link, and the end-to-end QoS profile of the second portion is associated with a second communication link between the first UE and the third UE; determining a first RLC layer and channel configuration for the first communication link and a second RLC layer and channel configuration for the second communication link; and relaying signaling between the second UE and the third UE based at least in part on the second RLC layer and channel configuration.

[0264] Aspect 38: According to the method of aspect 37, the first RLC layer and channel configuration or the second RLC layer and channel configuration or both are determined at least in part based on signaling from a network entity, or one or more pre-configured RLC layer and channel configurations, or any combination thereof.

[0265] Aspect 39: The method according to any one of Aspects 37 to 38, wherein the configuration information further includes indications of the end-to-end QoS profile of the first portion and the end-to-end QoS profile of the second portion.

[0266] Aspect 40: The method according to any one of Aspects 18 to 39, wherein the first message, the second message, or both comprise a PC5 RRC message or a PC5 signaling message.

[0267] Aspect 41: A first UE for wireless communication, the first UE comprising: one or more memories storing processor-executable code; and one or more processors coupled to the one or more memories and capable of operating individually or jointly to execute the code, so that the UE performs a method according to any one of aspects 1 to 17.

[0268] Aspect 42: A first UE for wireless communication, the first UE comprising at least one component for performing the method according to any one of aspects 1 to 17.

[0269] Aspect 43: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by one or more processors individually or jointly to perform the method according to any one of aspects 1 to 17.

[0270] Aspect 44: A first UE for wireless communication, the first UE comprising: one or more memories storing processor-executable code; and one or more processors coupled to the one or more memories and capable of operating individually or jointly to execute the code, so that the UE performs a method according to any one of aspects 18 to 40.

[0271] Aspect 45: A first UE for wireless communication, the first UE comprising at least one component for performing a method according to any one of aspects 18 to 40.

[0272] Aspect 46: A non-transitory computer-readable medium storing code for wireless communication, said code comprising instructions executable individually or jointly by one or more processors to perform the method according to any one of aspects 18 to 40.

[0273] It should be noted that the methods described herein describe possible specific implementations, and the operations and steps can be rearranged or otherwise modified, and other specific implementations are also possible. Furthermore, aspects from two or more of these methods can be combined.

[0274] While aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the description, the techniques described herein are also applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described are applicable to a variety of other wireless communication systems, such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0275] The information and signals described herein can be represented using any of a variety of different techniques and skills. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or optical particles, or any combination thereof.

[0276] The various exemplary blocks and components described herein can be implemented or performed using a general-purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any combination thereof, designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in alternative embodiments, a 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 cooperating with a DSP core, or any other such configuration). Any function or operation described herein that can be performed by a processor may be performed by multiple processors capable of performing the described functions or operations individually or jointly.

[0277] The functionality described herein can be implemented using hardware, software executed by a processor, firmware, or any combination thereof. When implemented using software executed by a processor, the functionality can be stored as one or more instructions or code on a computer-readable medium or transmitted using one or more instructions or code on a computer-readable medium. Other examples and specific implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functionality described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these. Features implementing the functionality can also be physically located in various locations, including portions distributed such that the functionality is implemented at different physical locations.

[0278] Computer-readable media includes both non-transitory computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. Non-transitory storage media can be any available medium accessible 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, compressed optical disc (CD) ROM or other optical disc storage devices, magnetic disk storage devices or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code components in the form of instructions or data structures, and accessible by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Furthermore, any connection is appropriately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included within the definition of computer-readable media. As used herein, disks and optical discs include CDs, laser discs, optical discs, digital multifunction discs (DVDs), floppy disks, and Blu-ray discs. Disks can magnetically reproduce data, and optical discs can optically reproduce data using lasers. Combinations of the above are also included within the scope of computer-readable media. Any function or operation described herein that can be performed by memory can be performed by multiple memories capable of performing the described function or operation individually or jointly.

[0279] As used herein, the word "or" in a list of items (e.g., a list of items accompanied by phrases such as "at least one of" or "one or more of") in the claims indicates an inclusive list, such that a list of at least one of, for example, 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). Furthermore, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an example step described as "based on condition A" could be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0280] As used herein, including in claims, the article “a” preceding a noun is open-ended and is understood to refer to “at least one” or “one or more” of those nouns. Therefore, the terms “a,” “at least one,” “one or more,” and “at least one of one or more” are interchangeable. For example, where a claim enumerates “components” performing 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 “component” having a characteristic or performing a function may refer to “at least one of one or more components” having a particular characteristic or performing a particular function. Subsequent references to a component introduced with the article “a” using the terms “the” or “the” can refer to any or all of the one or more components. For example, a component introduced with the article “a” can be understood to mean “one or more components,” and subsequent reference to “the component” in a claim can be understood as equivalent to referring to “at least one of the one or more components.” Similarly, subsequent references to a component introduced with the terms “the” or “the” as “one or more components” can refer to any or all of the one or more components. For example, reference to "the one or more components" in the subsequent claims can be understood as equivalent to reference to "at least one of the one or more components".

[0281] The term "determine" encompasses a variety of actions, and therefore, "determine" can include calculation, computation, processing, derivation, investigation, lookup (such as by searching in a table, database, or other data structure), identification, and similar actions. Furthermore, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data stored in memory), etc. Moreover, "determine" can include parsing, obtaining, selecting, choosing, creating, and other similar actions.

[0282] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, various components of the same type can be distinguished by adding a dash after the reference numeral and a second reference numeral to differentiate them. If only the first reference numeral is used in the description, the description can be applied to any of the similar components having the same first reference numeral, regardless of the second or other subsequent reference numerals.

[0283] The description herein, illustrated with reference to the accompanying drawings, describes an example configuration and does not represent all achievable examples or those within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," not "preferred" or "advantageous over other examples." The detailed description includes specific details used to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concept of the described examples.

[0284] The description herein is provided to enable those skilled in the art to implement or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A first user equipment (UE), the first user equipment (UE) comprising: One or more memories, wherein the one or more memories store processor-executable code; and One or more processors, said one or more processors coupled to said one or more memories and capable of operating individually or jointly to execute said code to enable the first UE: A first communication link is established with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; Send a first message to the second UE, the first message indicating a set of end-to-end service information and end-to-end quality of service profiles associated with the end-to-end communication link; as well as A second message is received from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

2. The first UE according to claim 1, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Determine a mapping between one or more end-to-end quality of service flow identifiers and corresponding end-to-end data radio bearers for the end-to-end communication link, wherein the end-to-end service information includes an indication of the mapping.

3. The first UE according to claim 2, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: A third message is received from a network entity, the third message indicating the mapping between the one or more end-to-end quality of service flow identifiers and the corresponding end-to-end data radio bearers, wherein the mapping is determined at least in part based on the third message.

4. The first UE of claim 2, wherein the mapping is determined at least in part based on a pre-configured mapping between the one or more end-to-end quality of service flow identifiers and the corresponding end-to-end data radio bearers.

5. The first UE of claim 2, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: The end-to-end quality of service profile for the first part is determined at least in part based on the configuration information indicating the end-to-end quality of service profile for the first part of the first communication link in the set of end-to-end quality of service profiles and one or more corresponding end-to-end quality of service flow identifiers for the first communication link; and The second UE communicates with the third UE at least in part based on a first radio link control layer and channel configuration for the first communication link, the first radio link control layer and channel configuration being mapped to the end-to-end data radio bearer of the end-to-end communication link.

6. The first UE of claim 2, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: The first radio link control layer and channel configuration for the first communication link are determined at least in part based on the configuration information indicating the first radio link control layer and channel configuration for the first communication link, the first radio link control layer and channel configuration being mapped to the end-to-end data radio bearer of the end-to-end communication link; and The second UE communicates with the third UE via the first UE, at least in part, based on the first radio link control layer and channel configuration.

7. The first UE of claim 1, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: A first radio link control layer and channel configuration for the first communication link and a second radio link control layer and channel configuration for the second communication link between the second UE and the third UE are determined, wherein the first radio link control layer and channel configuration and the second radio link control layer and channel configuration are based at least in part on the configuration information and a mapping between one or more end-to-end quality of service flow identifiers and end-to-end data radio bearers of the end-to-end communication link; A fourth message is sent to the second UE, the fourth message indicating the index of the end-to-end data radio bearer and the second radio link control layer and channel configuration for the second communication link, wherein the second radio link control layer and channel configuration are mapped to the end-to-end data radio bearer; as well as The second UE communicates with the third UE via the first UE, at least in part, based on the first radio link control layer and channel configuration.

8. The first UE according to claim 7, wherein the configuration information includes an indication of an end-to-end quality of service profile from a first portion of the end-to-end quality of service profile set and a set of end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile of the first portion.

9. The first UE according to claim 7, wherein the end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set.

10. The first UE according to claim 1, wherein: The end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link, and The configuration information includes an indication of an end-to-end quality of service profile from a first portion of the end-to-end quality of service profile set, and also includes a set of end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile of the first portion or a set of data radio bearer identifiers corresponding to the end-to-end quality of service profile of the first portion.

11. The first UE of claim 10, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Determine a first radio link control layer and channel configuration for the first communication link, wherein the first radio link control layer and channel configuration are for the end-to-end quality of service flow identifier set or the data radio bearer identifier set; Send a fifth message to the second UE, indicating the first radio link control layer and channel configuration; as well as The second UE communicates with the third UE via the first UE, at least in part, based on the first radio link control layer and channel configuration.

12. The first UE according to claim 1, wherein: The end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link, and The configuration information includes an indication of a first radio link control layer and channel configuration for the first communication link, and the configuration information also indicates an end-to-end quality of service flow identifier set or a data radio bearer identifier set associated with the first radio link control layer and channel configuration.

13. The first UE of claim 12, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: For the end-to-end quality of service flow identifier set or the data radio bearer identifier set, the first radio link control layer and channel configuration for the first communication link are determined at least in part based on the indication of the first radio link control layer and channel configuration; and The second UE communicates with the third UE via the first UE, at least in part, based on the first radio link control layer and channel configuration.

14. The first UE of claim 13, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Send a sixth message to the network entity, the sixth message including the indication of the first radio link control layer and channel configuration, and the end-to-end quality of service profile of the first portion; and A seventh message is received from the network entity, the seventh message indicating a modified radio link control layer and channel configuration that differs from the first radio link control layer and channel configuration indicated by the second UE, wherein the determined first radio link control layer and channel configuration includes at least in part the modified radio link control layer and channel configuration based on the seventh message.

15. The first UE of claim 13, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Send a sixth message to the network entity, the sixth message including the indication of the first radio link control layer and channel configuration, and the end-to-end quality of service profile of the first portion; and A seventh message is received from the network entity, the seventh message indicating an unmodified radio link control layer and channel configuration that is the same as the first radio link control layer and channel configuration indicated by the second UE, wherein the determined first radio link control layer and channel configuration includes the unmodified radio link control layer and channel configuration.

16. The first UE according to claim 12, wherein the configuration information further includes indications of an end-to-end quality of service profile in the first part and an end-to-end quality of service profile in the second part.

17. The first UE according to claim 1, wherein the first message, the second message, or both comprise a PC5 radio resource control message or a PC5 signaling message.

18. A first user equipment (UE), the first user equipment (UE) comprising: One or more memories, wherein the one or more memories store processor-executable code; and One or more processors, said one or more processors coupled to said one or more memories and capable of operating individually or jointly to execute said code to enable the first UE: A first communication link is established with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; The second UE receives a first message, the first message indicating an end-to-end service information and an end-to-end quality of service profile set associated with the end-to-end communication link; as well as A second message is sent to the second UE, the second message indicating configuration information for at least a first part of the end-to-end communication link, the first part of the end-to-end communication link including the first communication link between the first UE and the second UE.

19. The first UE of claim 18, wherein the end-to-end service information includes an indication of a mapping between one or more end-to-end quality of service flow identifiers and corresponding end-to-end data radio bearers corresponding to the end-to-end communication link, and the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: The end-to-end data radio bearer of the end-to-end communication link is identified at least in part based on the mapping; and For the identified end-to-end data radio bearer, determine an end-to-end quality of service profile of a first portion and an end-to-end quality of service profile of a second portion in the set of end-to-end quality of service profiles, wherein the end-to-end quality of service profile of the first portion is associated with the first communication link and the end-to-end quality of service profile of the second portion is associated with the second communication link between the first UE and the third UE.

20. The first UE of claim 19, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Determine a first radio link control layer and channel configuration for the first communication link, or a second radio link control layer and channel configuration for the second communication link, or both.

21. The first UE of claim 20, wherein the configuration information includes an indication of an end-to-end quality of service profile for the first portion and one or more corresponding end-to-end quality of service flow identifiers for the first communication link, and the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration for the second communication link.

22. The first UE of claim 20, wherein the configuration information includes indications of the first radio link control layer and channel configuration for the first communication link, and the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration for the second communication link.

23. The first UE of claim 20, wherein the first radio link control layer and channel configuration or the second radio link control layer and channel configuration or both are determined at least in part based on signaling from a network entity, or one or more pre-configured radio link control layer and channel configurations, or any combination thereof.

24. The first UE of claim 18, wherein the end-to-end service information includes one or more quality of service flow identifiers corresponding to the end-to-end quality of service profile set, and the one or more processors are individually or jointly operable to execute the code to cause the first UE to: The end-to-end quality of service profile of a first portion and the end-to-end quality of service profile of a second portion are determined at least in part based on the end-to-end quality of service profile set and the one or more quality of service flow identifiers, wherein the end-to-end quality of service profile of the first portion is associated with the first communication link and the end-to-end quality of service profile of the second portion is associated with a second communication link between the first UE and the third UE, wherein the configuration information includes an indication of the end-to-end quality of service profile of the first portion and a set of end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile of the first portion.

25. The first UE of claim 24, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: The second UE receives a fourth message indicating an index of the end-to-end data radio bearer of the end-to-end communication link and an indication of the second radio link control layer and channel configuration for the second communication link, wherein the second radio link control layer and channel configuration are mapped to the end-to-end data radio bearer. The second radio link control layer and channel configuration are determined at least in part based on the indications to the second radio link control layer and channel configuration; as well as Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration.

26. The first UE of claim 25, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Send an eighth message to the network entity, the eighth message including the indication of the second radio link control layer and channel configuration; and A ninth message is received from the network entity, the ninth message indicating a modified radio link control layer and channel configuration that differs from the second radio link control layer and channel configuration indicated by the second UE, wherein the determined second radio link control layer and channel configuration includes the modified radio link control layer and channel configuration.

27. The first UE of claim 26, wherein the eighth message further includes an indication of an end-to-end quality of service profile for the second portion of the second communication link.

28. The first UE of claim 25, wherein the one or more processors are individually or jointly further operable to execute the code to cause the second UE to: Send an eighth message to the network entity, the eighth message including the indication of the second radio link control layer and channel configuration; and A ninth message is received from the network entity, the ninth message indicating an unmodified radio link control layer and channel configuration that is the same as the second radio link control layer and channel configuration indicated by the second UE, wherein the determined second radio link control layer and channel configuration includes the unmodified radio link control layer and channel configuration.

29. The first UE of claim 18, wherein the end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link, and the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: The configuration information includes an end-to-end quality of service profile of a first portion and an end-to-end quality of service profile of a second portion, wherein the end-to-end quality of service profile of the first portion is associated with the first communication link and the end-to-end quality of service profile of the second portion is associated with the second communication link between the first UE and the third UE, and wherein the configuration information includes an indication of the end-to-end quality of service profile of the first portion and also indicates a first end-to-end quality of service flow identifier set or a data radio bearer identifier set corresponding to the end-to-end quality of service profile of the first portion.

30. The first UE of claim 29, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: The second UE receives a fifth message indicating a first radio link control layer and channel configuration for the first communication link, wherein the first radio link control layer and channel configuration are based at least in part on the first end-to-end quality of service flow identifier set or the data radio bearer identifier set. The second radio link control layer and channel configuration for the second communication link are determined at least in part based on the first radio link control layer and channel configuration, the end-to-end quality of service profile of the second part, the set of data radio bearer identifiers, or any combination thereof; as well as Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration.

31. The first UE according to claim 30, wherein, In order to determine the second radio link control layer and channel configuration, the one or more processors can operate individually or jointly to execute the code to enable the first UE to: For the end-to-end quality of service flow of the second part, the second radio link control layer and channel configuration for the second communication link are determined at least in part based on the first radio link control layer and channel configuration and the end-to-end quality of service profile of the second part.

32. The first UE of claim 31, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Send a tenth message to the network entity indicating the end-to-end quality of service profile of the second part; and An eleventh message is received from the network entity, the eleventh message indicating a second radio link control layer and channel configuration based at least in part on the end-to-end quality of service profile of the second portion, wherein the second radio link control layer and channel configuration are determined at least in part based on the eleventh message.

33. The first UE of claim 30, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Store a first mapping between the first radio link control layer and channel configuration and the first communication link, and a second mapping between the second radio link control layer and channel configuration and the second communication link.

34. The first UE according to claim 30, wherein, In order to determine the second radio link control layer and channel configuration, the one or more processors can operate individually or jointly to execute the code to enable the first UE to: For the set of data radio bearer identifiers, determine the second radio link control layer and channel configuration for the second communication link.

35. The first UE of claim 34, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: A twelfth message is received from a network entity, indicating the second radio link control layer and channel configuration, wherein the second radio link control layer and channel configuration are determined at least in part based on the twelfth message.

36. The first UE according to claim 18, wherein: The end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link, and The configuration information includes an indication of a first radio link control layer and channel configuration for the first communication link, and the configuration information also indicates an end-to-end quality of service flow identifier set or a data radio bearer identifier set associated with the first radio link control layer and channel configuration.

37. The first UE of claim 36, wherein the one or more processors are individually or jointly further operable to execute the code to cause the first UE to: Determine a first portion of the end-to-end quality of service profile and a second portion of the end-to-end quality of service profile set, wherein the first portion of the end-to-end quality of service profile is associated with the first communication link, and the second portion of the end-to-end quality of service profile is associated with a second communication link between the first UE and the third UE. Determine the first radio link control layer and channel configuration for the first communication link and the second radio link control layer and channel configuration for the second communication link; as well as Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration.

38. The first UE of claim 37, wherein the first radio link control layer and channel configuration or the second radio link control layer and channel configuration or both are determined at least in part based on signaling from a network entity, or one or more pre-configured radio link control layer and channel configurations, or any combination thereof.

39. The first UE according to claim 37, wherein the configuration information further includes indications of the end-to-end quality of service profile of the first portion and the end-to-end quality of service profile of the second portion.

40. The first UE of claim 18, wherein the first message, the second message, or both comprise a PC5 radio resource control message or a PC5 signaling message.

41. A method for conducting wireless communication at a first user equipment (UE), the method comprising: A first communication link is established with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; Send a first message to the second UE, the first message indicating a set of end-to-end service information and end-to-end quality of service profiles associated with the end-to-end communication link; as well as A second message is received from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

42. The method according to claim 41, further comprising: Determine a mapping between one or more end-to-end quality of service flow identifiers and corresponding end-to-end data radio bearers for the end-to-end communication link, wherein the end-to-end service information includes an indication of the mapping.

43. The method according to claim 42, further comprising: The subset of end-to-end quality of service profiles for the first communication link is determined at least in part based on a first subset of end-to-end quality of service profiles in the set of end-to-end quality of service profiles indicated by the second message for the first communication link and one or more corresponding end-to-end quality of service flow identifiers; as well as The second UE communicates with the third UE at least in part based on a first radio link control channel configuration for the first communication link, the first radio link control channel configuration being mapped to the end-to-end data radio bearer of the end-to-end communication link, wherein the first radio link control channel configuration is at least in part based on a subset of the first end-to-end quality of service profile.

44. The method according to claim 42, further comprising: The first radio link control channel configuration for the first communication link is determined at least in part based on the second message indicating the first radio link control channel configuration for the first communication link, the first radio link control channel configuration being mapped to the end-to-end data radio bearer of the end-to-end communication link, wherein the first radio link control channel configuration is at least in part based on a subset of end-to-end quality of service profiles of the set of end-to-end quality of service profiles for the first communication link; as well as The second UE communicates with the third UE via the first UE, at least in part, based on the configuration of the first radio link control channel.

45. The method according to claim 41, further comprising: A first radio link control layer and channel configuration for the first communication link and a second radio link control layer and channel configuration for the second communication link between the second UE and the third UE are determined, wherein the first radio link control layer and channel configuration and the second radio link control layer and channel configuration are based at least in part on the configuration information and a mapping between one or more end-to-end quality of service flow identifiers and end-to-end data radio bearers of the end-to-end communication link; A fourth message is sent to the second UE, the fourth message indicating the index of the end-to-end data radio bearer and the second radio link control layer and channel configuration for the second communication link, wherein the second radio link control layer and channel configuration are mapped to the end-to-end data radio bearer; as well as The second UE communicates with the third UE via the first UE, at least in part, based on the first radio link control layer and channel configuration.

46. ​​The method of claim 41, wherein: The end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link; and The configuration information includes an indication of an end-to-end quality of service profile from a first portion of the end-to-end quality of service profile set, and also includes a set of end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile of the first portion or a set of data radio bearer identifiers corresponding to the end-to-end quality of service profile of the first portion.

47. The method of claim 41, wherein: The end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link; and The configuration information includes an indication of a first radio link control layer and channel configuration for the first communication link, and the configuration information also indicates an end-to-end quality of service flow identifier set or a data radio bearer identifier set associated with the first radio link control layer and channel configuration.

48. A method for wireless communication at a first user equipment (UE), the method comprising: A first communication link is established with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, and wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; The second UE receives a first message, the first message indicating an end-to-end service information and an end-to-end quality of service profile set associated with the end-to-end communication link; as well as A second message is sent to the second UE, the second message indicating configuration information for at least a first part of the end-to-end communication link, the first part of the end-to-end communication link including the first communication link between the first UE and the second UE.

49. The method of claim 48, wherein the end-to-end service information includes an indication of a mapping between one or more end-to-end quality of service flow identifiers and corresponding end-to-end data radio bearers corresponding to the end-to-end communication link, the method further comprising: The end-to-end data radio bearer of the end-to-end communication link is identified at least in part based on the mapping; as well as For the identified end-to-end data radio bearer, determine an end-to-end quality of service profile of a first portion and an end-to-end quality of service profile of a second portion in the set of end-to-end quality of service profiles, wherein the end-to-end quality of service profile of the first portion is associated with the first communication link and the end-to-end quality of service profile of the second portion is associated with the second communication link between the first UE and the third UE.

50. The method of claim 48, wherein the end-to-end service information includes one or more quality of service flow identifiers corresponding to the end-to-end quality of service profile set, the method further comprising: The end-to-end quality of service profile of a first portion and the end-to-end quality of service profile of a second portion are determined at least in part based on the end-to-end quality of service profile set and the one or more quality of service flow identifiers, wherein the end-to-end quality of service profile of the first portion is associated with the first communication link and the end-to-end quality of service profile of the second portion is associated with a second communication link between the first UE and the third UE, wherein the configuration information includes an indication of the end-to-end quality of service profile of the first portion and a set of end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile of the first portion.

51. The method of claim 48, wherein the end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link, the method further comprising: The configuration information includes an end-to-end quality of service profile of a first portion and an end-to-end quality of service profile of a second portion, wherein the end-to-end quality of service profile of the first portion is associated with the first communication link and the end-to-end quality of service profile of the second portion is associated with the second communication link between the first UE and the third UE, and wherein the configuration information includes an indication of the end-to-end quality of service profile of the first portion and also indicates a first end-to-end quality of service flow identifier set or a data radio bearer identifier set corresponding to the end-to-end quality of service profile of the first portion.

52. The method of claim 48, wherein: The end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link; and The configuration information includes an indication of a first radio link control layer and channel configuration for the first communication link, and the configuration information also indicates an end-to-end quality of service flow identifier set or a data radio bearer identifier set associated with the first radio link control layer and channel configuration.

53. A first user equipment (UE) for wireless communication, the first user equipment (UE) comprising: A component for establishing a first communication link with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; A component for sending a first message to the second UE, the first message indicating a set of end-to-end service information and end-to-end quality of service profiles associated with the end-to-end communication link; and A component for receiving a second message from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

54. A first user equipment (UE) for wireless communication, the first user equipment (UE) comprising: A component for establishing a first communication link with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; A component for receiving a first message from the second UE, the first message indicating a set of end-to-end service information and end-to-end quality of service profiles associated with the end-to-end communication link; and A component for sending a second message to the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

55. A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable individually or collectively by one or more processors to: A first communication link is established with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; Send a first message to the second UE, the first message indicating a set of end-to-end service information and end-to-end quality of service profiles associated with the end-to-end communication link; as well as A second message is received from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

56. A non-transitory computer-readable medium storing code for wireless communication at a first user equipment (UE), the code including instructions executable individually or jointly by one or more processors to: A first communication link is established with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, and wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; Receive a first message from the second UE, the first message indicating end-to-end service information and an end-to-end quality of service profile set associated with the end-to-end communication link; and A second message is sent to the second UE, the second message indicating configuration information for at least a first part of the end-to-end communication link, the first part of the end-to-end communication link including the first communication link between the first UE and the second UE.

57. A method for wireless communication by a first user equipment (UE), the method comprising: A first communication link is established with a second UE, the second UE operating as a relay for communication between the first UE and a third UE, wherein the communication between the first UE and the third UE is associated with an end-to-end communication link; Send a first message to the second UE, the first message indicating a set of end-to-end service information and end-to-end quality of service profiles associated with the end-to-end communication link; as well as A second message is received from the second UE, the second message indicating configuration information for at least a first portion of the end-to-end communication link, the first portion of the end-to-end communication link including the first communication link between the first UE and the second UE.

58. The method according to claim 57, further comprising: Determine a mapping between one or more end-to-end quality of service flow identifiers and corresponding end-to-end data radio bearers for the end-to-end communication link, wherein the end-to-end service information includes an indication of the mapping.

59. The method according to claim 58, further comprising: A third message is received from a network entity, the third message indicating the mapping between the one or more end-to-end quality of service flow identifiers and the corresponding end-to-end data radio bearers, wherein the mapping is determined at least in part based on the third message.

60. The method of any one of claims 58 to 59, wherein the mapping is determined at least in part based on a pre-configured mapping between the one or more end-to-end quality of service flow identifiers and the corresponding end-to-end data radio bearers.

61. The method according to any one of claims 58 to 60, the method further comprising: The end-to-end quality of service profile of the first part is determined at least in part based on the configuration information indicating the end-to-end quality of service profile for the first part of the first communication link in the set of end-to-end quality of service profiles and one or more corresponding end-to-end quality of service flow identifiers for the first communication link. as well as The second UE communicates with the third UE at least in part based on a first radio link control layer and channel configuration for the first communication link, the first radio link control layer and channel configuration being mapped to the end-to-end data radio bearer of the end-to-end communication link.

62. The method according to any one of claims 58 to 61, the method further comprising: The first radio link control layer and channel configuration for the first communication link are determined at least in part based on the configuration information indicating the first radio link control layer and channel configuration for the first communication link, the first radio link control layer and channel configuration being mapped to the end-to-end data radio bearer of the end-to-end communication link; as well as The second UE communicates with the third UE via the first UE, at least in part, based on the first radio link control layer and channel configuration.

63. The method according to claim 57, further comprising: A first radio link control layer and channel configuration for the first communication link and a second radio link control layer and channel configuration for the second communication link between the second UE and the third UE are determined, wherein the first radio link control layer and channel configuration and the second radio link control layer and channel configuration are based at least in part on the configuration information and a mapping between one or more end-to-end quality of service flow identifiers and end-to-end data radio bearers of the end-to-end communication link; A fourth message is sent to the second UE, the fourth message indicating the index of the end-to-end data radio bearer and the second radio link control layer and channel configuration for the second communication link, wherein the second radio link control layer and channel configuration are mapped to the end-to-end data radio bearer; as well as The second UE communicates with the third UE via the first UE, at least in part, based on the first radio link control layer and channel configuration.

64. The method of claim 63, wherein the configuration information includes an indication of an end-to-end quality of service profile from a first portion of the end-to-end quality of service profile set and a set of end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile of the first portion.

65. The method according to any one of claims 63 to 64, wherein the end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set.

66. The method of claim 57, wherein: The end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link, and The configuration information includes an indication of an end-to-end quality of service profile from a first portion of the end-to-end quality of service profile set, and also includes a set of end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile of the first portion or a set of data radio bearer identifiers corresponding to the end-to-end quality of service profile of the first portion.

67. The method according to claim 66, further comprising: Determine a first radio link control layer and channel configuration for the first communication link, wherein the first radio link control layer and channel configuration are for the end-to-end quality of service flow identifier set or the data radio bearer identifier set; Send a fifth message to the second UE, indicating the first radio link control layer and channel configuration; as well as The second UE communicates with the third UE via the first UE, at least in part, based on the first radio link control layer and channel configuration.

68. The method of claim 57, wherein: The end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link, and The configuration information includes an indication of a first radio link control layer and channel configuration for the first communication link, and the configuration information also indicates an end-to-end quality of service flow identifier set or a data radio bearer identifier set associated with the first radio link control layer and channel configuration.

69. The method of claim 68, further comprising: For the end-to-end quality of service flow identifier set or the data radio bearer identifier set, the first radio link control layer and channel configuration for the first communication link are determined at least in part based on the indication of the first radio link control layer and channel configuration. as well as The second UE communicates with the third UE via the first UE, at least in part, based on the first radio link control layer and channel configuration.

70. The method of claim 69, further comprising: A sixth message is sent to the network entity, the sixth message including the indication of the first radio link control layer and channel configuration and the end-to-end quality of service profile of the first part; as well as A seventh message is received from the network entity, the seventh message indicating a modified radio link control layer and channel configuration that differs from the first radio link control layer and channel configuration indicated by the second UE, wherein the determined first radio link control layer and channel configuration includes at least in part the modified radio link control layer and channel configuration based on the seventh message.

71. The method according to any one of claims 69, further comprising: A sixth message is sent to the network entity, the sixth message including the indication of the first radio link control layer and channel configuration and the end-to-end quality of service profile of the first part; as well as A seventh message is received from the network entity, the seventh message indicating an unmodified radio link control layer and channel configuration that is the same as the first radio link control layer and channel configuration indicated by the second UE, wherein the determined first radio link control layer and channel configuration includes the unmodified radio link control layer and channel configuration.

72. The method according to any one of claims 68 to 71, wherein the configuration information further includes indications of the end-to-end quality of service profile of the first portion and the end-to-end quality of service profile of the second portion.

73. The method according to any one of claims 57 to 72, wherein the first message, the second message, or both comprise a PC5 radio resource control message or a PC5 signaling message.

74. A method for wireless communication by a first user equipment (UE), the method comprising: A first communication link is established with a second UE, wherein the first UE operates as a relay for communication between the second UE and a third UE, and wherein the communication between the second UE and the third UE is associated with an end-to-end communication link; The second UE receives a first message, the first message indicating an end-to-end service information and an end-to-end quality of service profile set associated with the end-to-end communication link; as well as A second message is sent to the second UE, the second message indicating configuration information for at least a first part of the end-to-end communication link, the first part of the end-to-end communication link including the first communication link between the first UE and the second UE.

75. The method of claim 74, wherein the end-to-end service information includes an indication of a mapping between one or more end-to-end quality of service flow identifiers and corresponding end-to-end data radio bearers corresponding to the end-to-end communication link, the method further comprising: The end-to-end data radio bearer of the end-to-end communication link is identified at least in part based on the mapping; as well as For the identified end-to-end data radio bearer, determine an end-to-end quality of service profile of a first portion and an end-to-end quality of service profile of a second portion in the set of end-to-end quality of service profiles, wherein the end-to-end quality of service profile of the first portion is associated with the first communication link and the end-to-end quality of service profile of the second portion is associated with the second communication link between the first UE and the third UE.

76. The method according to claim 75, further comprising: Determine a first radio link control layer and channel configuration for the first communication link, or a second radio link control layer and channel configuration for the second communication link, or both.

77. The method of claim 76, wherein the configuration information includes an indication of an end-to-end quality of service profile for the first portion and one or more corresponding end-to-end quality of service flow identifiers for the first communication link, the method further comprising: Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration for the second communication link.

78. The method according to any one of claims 76 to 77, wherein the configuration information includes indications of the first radio link control layer and channel configuration for the first communication link, the method further comprising: Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration for the second communication link.

79. The method of any one of claims 76 to 78, wherein the first radio link control layer and channel configuration or the second radio link control layer and channel configuration or both are determined at least in part based on signaling from a network entity, or one or more pre-configured radio link control layer and channel configurations, or any combination thereof.

80. The method of claim 74, wherein the end-to-end service information includes one or more quality of service flow identifiers corresponding to the end-to-end quality of service profile set, the method further comprising: The end-to-end quality of service profile of a first portion and the end-to-end quality of service profile of a second portion are determined at least in part based on the end-to-end quality of service profile set and the one or more quality of service flow identifiers, wherein the end-to-end quality of service profile of the first portion is associated with the first communication link and the end-to-end quality of service profile of the second portion is associated with a second communication link between the first UE and the third UE, wherein the configuration information includes an indication of the end-to-end quality of service profile of the first portion and a set of end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile of the first portion.

81. The method according to claim 80, further comprising: The second UE receives a fourth message indicating an index of the end-to-end data radio bearer of the end-to-end communication link and an indication of the second radio link control layer and channel configuration for the second communication link, wherein the second radio link control layer and channel configuration are mapped to the end-to-end data radio bearer. The second radio link control layer and channel configuration are determined at least in part based on the indications to the second radio link control layer and channel configuration; as well as Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration.

82. The method according to claim 81, further comprising: Send an eighth message to the network entity, the eighth message including the indication of the second radio link control layer and channel configuration; as well as A ninth message is received from the network entity, the ninth message indicating a modified radio link control layer and channel configuration that differs from the second radio link control layer and channel configuration indicated by the second UE, wherein the determined second radio link control layer and channel configuration includes the modified radio link control layer and channel configuration.

83. The method of claim 82, wherein the eighth message further includes an indication of an end-to-end quality of service profile for the second portion of the second communication link.

84. The method according to claim 81, further comprising: Send an eighth message to the network entity, the eighth message including the indication of the second radio link control layer and channel configuration; as well as A ninth message is received from the network entity, the ninth message indicating an unmodified radio link control layer and channel configuration that is the same as the second radio link control layer and channel configuration indicated by the second UE, wherein the determined second radio link control layer and channel configuration includes the unmodified radio link control layer and channel configuration.

85. The method of claim 74, wherein the end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link, the method further comprising: The configuration information includes an end-to-end quality of service profile of a first portion and an end-to-end quality of service profile of a second portion, wherein the end-to-end quality of service profile of the first portion is associated with the first communication link and the end-to-end quality of service profile of the second portion is associated with the second communication link between the first UE and the third UE, and wherein the configuration information includes an indication of the end-to-end quality of service profile of the first portion and also indicates a first end-to-end quality of service flow identifier set or a data radio bearer identifier set corresponding to the end-to-end quality of service profile of the first portion.

86. The method according to claim 85, further comprising: The second UE receives a fifth message indicating a first radio link control layer and channel configuration for the first communication link, wherein the first radio link control layer and channel configuration are based at least in part on the first end-to-end quality of service flow identifier set or the data radio bearer identifier set. The second radio link control layer and channel configuration for the second communication link are determined at least in part based on the first radio link control layer and channel configuration, the end-to-end quality of service profile of the second part, the set of data radio bearer identifiers, or any combination thereof; as well as Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration.

87. The method of claim 86, wherein determining the second radio link control layer and channel configuration comprises: For the end-to-end quality of service flow of the second part, the second radio link control layer and channel configuration for the second communication link are determined at least in part based on the first radio link control layer and channel configuration and the end-to-end quality of service profile of the second part.

88. The method of claim 87, further comprising: Send a tenth message to the network entity indicating the end-to-end quality of service profile of the second part; as well as An eleventh message is received from the network entity, the eleventh message indicating a second radio link control layer and channel configuration based at least in part on the end-to-end quality of service profile of the second portion, wherein the second radio link control layer and channel configuration are determined at least in part based on the eleventh message.

89. The method according to any one of claims 86 to 88, the method further comprising: Store a first mapping between the first radio link control layer and channel configuration and the first communication link, and a second mapping between the second radio link control layer and channel configuration and the second communication link.

90. The method of any one of claims 86 to 89, wherein determining the second radio link control layer and channel configuration comprises: For the set of data radio bearer identifiers, determine the second radio link control layer and channel configuration for the second communication link.

91. The method according to claim 90, further comprising: A twelfth message is received from a network entity, indicating the second radio link control layer and channel configuration, wherein the second radio link control layer and channel configuration are determined at least in part based on the twelfth message.

92. The method according to claim 74, wherein: The end-to-end service information includes one or more end-to-end quality of service flow identifiers corresponding to the end-to-end quality of service profile set or one or more data radio bearer identifiers associated with the end-to-end communication link, and The configuration information includes an indication of a first radio link control layer and channel configuration for the first communication link, and the configuration information also indicates an end-to-end quality of service flow identifier set or a data radio bearer identifier set associated with the first radio link control layer and channel configuration.

93. The method according to claim 92, further comprising: Determine a first portion of the end-to-end quality of service profile and a second portion of the end-to-end quality of service profile set, wherein the first portion of the end-to-end quality of service profile is associated with the first communication link, and the second portion of the end-to-end quality of service profile is associated with a second communication link between the first UE and the third UE. Determine the first radio link control layer and channel configuration for the first communication link and the second radio link control layer and channel configuration for the second communication link; as well as Relaying signaling between the second UE and the third UE is based at least in part on the second radio link control layer and channel configuration.

94. The method of claim 93, wherein the first radio link control layer and channel configuration or the second radio link control layer and channel configuration or both are determined at least in part based on signaling from a network entity, or one or more pre-configured radio link control layer and channel configurations, or any combination thereof.

95. The method according to any one of claims 93 to 94, wherein the configuration information further includes indications of the end-to-end quality of service profile of the first portion and the end-to-end quality of service profile of the second portion.

96. The method according to any one of claims 74 to 95, wherein the first message, the second message, or both comprise a PC5 radio resource control message or a PC5 signaling message.

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