Relay from user equipment to network

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a remote user equipment (UE) may: establish a unicast link between the remote UE and a relay UE via a sidelink signaling interface; establish a connection with a base station via the relay UE, wherein messages associated with establishing the connection are communicated via the unicast link; establish one or more bearers based at least in part on a radio bearer configuration received from the base station via the connection; establish one or more sidelink access stratum entities for the one or more bearers with the relay UE using one or more sidelink radio resource control messages based at least in part on an access stratum configuration received from the base station via the connection; and receive or transmit control plane or user plane traffic via the one or more bearers.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 968,923, filed on January 31, 2020, entitled “LAYER 2 USER EQUIPMENT-TO-NETWORK RELAY,” and U.S. Non-Provisional Patent Application No. 17 / 248,476, filed on January 26, 2021, entitled “USER EQUIPMENT TO NETWORK RELAY,” which are hereby expressly incorporated herein by reference.

[0003] Public domain

[0004] Aspects of the present disclosure generally relate to wireless communications and techniques and apparatus for user equipment (UE) to network relay.

[0005] background

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0007] A wireless network may include several base stations (BSs) that can support communications for several user equipments (UEs). The UE may communicate with the BS via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, while the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, the BS may be referred to as a Node B, a gNB, an Access Point (AP), a Radio Head, a Transmit Receiving Point (TRP), a New Radio (NR) BS, a 5G Node B, and the like.

[0008] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different user equipment to communicate at city, country, region, and even global levels. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR and other radio access technologies are still useful.

[0009] Overview

[0010] In some aspects, a wireless communication method performed by a remote UE may include: establishing a unicast link between the remote UE and a relay UE via a sidelink signaling interface; establishing a connection with a base station via the relay UE, wherein messages associated with establishing the connection are communicated via the unicast link; establishing one or more bearers based at least in part on a radio bearer configuration received from the base station via the connection; establishing one or more sidelink access stratum entities for the one or more bearers with the relay UE using one or more sidelink radio resource control messages based at least in part on an access stratum configuration received from the base station via the connection; and receiving or transmitting control plane or user plane traffic via the one or more bearers.

[0011] In some aspects, a wireless communication method performed by a base station may include: establishing a connection with a remote UE via a relay UE, wherein a message associated with establishing the connection is communicated via a unicast link between the remote UE and the relay UE; transmitting a radio bearer configuration and an access stratum configuration for one or more bearers via the connection, wherein the access stratum configuration is used for one or more sidelink access stratum entities of the remote UE and the relay UE, and wherein the access stratum configuration indicates parameters associated with a radio resource control (RRC) state operation; and receiving or transmitting control plane or user plane traffic associated with the remote UE via the one or more bearers.

[0012] In some aspects, a wireless communication method performed by a relay UE may include: establishing a unicast link between the relay UE and a remote UE via a sidelink signaling interface; relaying messages associated with establishing a connection between the remote UE and a base station via the unicast link; establishing with the remote UE one or more sidelink access stratum entities for one or more bearers associated with the connection for the remote UE based at least in part on a sidelink access stratum configuration; establishing with the base station one or more radio access stratum entities for one or more bearers associated with the connection for the remote UE based at least in part on a radio access stratum configuration received by the relay UE; and relaying control plane or user plane traffic between the remote UE and the base station via the one or more sidelink access stratum entities and the one or more radio access stratum entities.

[0013] In some aspects, a remote UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: establish a unicast link between the remote UE and a relay UE via a sidelink signaling interface; establish a connection with a base station via the relay UE, wherein a message associated with establishing the connection is communicated via the unicast link; establish one or more bearers based at least in part on a radio bearer configuration received from the base station via the connection; establish one or more sidelink access stratum entities for the one or more bearers with the relay UE using one or more sidelink radio resource control messages based at least in part on an access stratum configuration received from the base station via the connection; and receive or transmit control plane or user plane traffic via the one or more bearers.

[0014] In some aspects, a base station for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: establish a connection with a remote UE via a relay UE, wherein a message associated with establishing the connection is communicated via a unicast link between the remote UE and the relay UE; transmit a radio bearer configuration and an access stratum configuration for one or more bearers via the connection, wherein the access stratum configuration is for one or more sidelink access stratum entities of the remote UE and the relay UE, and wherein the access stratum configuration indicates parameters associated with a radio resource control (RRC) state operation; and receive or transmit control plane or user plane traffic associated with the remote UE via the one or more bearers.

[0015] In some aspects, a relay UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: establish a unicast link between the relay UE and a remote UE via a sidelink signaling interface; relay messages associated with establishing a connection between the remote UE and a base station via the unicast link; establish one or more sidelink access stratum entities for one or more bearers associated with the connection of the remote UE with the remote UE based at least in part on a sidelink access stratum configuration; establish one or more radio access stratum entities for one or more bearers associated with the connection of the remote UE with the base station based at least in part on a radio access stratum configuration received by the relay UE; and relay control plane or user plane traffic between the remote UE and the base station via the one or more sidelink access stratum entities and the one or more radio access stratum entities.

[0016] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a remote UE, may cause the one or more processors to: establish a unicast link between the remote UE and a relay UE via a sidelink signaling interface; establish a connection with a base station via the relay UE, wherein messages associated with establishing the connection are communicated via the unicast link; establish one or more bearers based at least in part on a radio bearer configuration received from the base station via the connection; establish one or more sidelink access stratum entities for the one or more bearers with the relay UE using one or more sidelink radio resource control messages based at least in part on an access stratum configuration received from the base station via the connection; and receive or transmit control plane or user plane traffic via the one or more bearers.

[0017] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to: establish a connection with a remote UE via a relay UE, wherein a message associated with establishing the connection is communicated via a unicast link between the remote UE and the relay UE; transmit a radio bearer configuration and an access stratum configuration for one or more bearers via the connection, wherein the access stratum configuration is for one or more sidelink access stratum entities of the remote UE and the relay UE, and wherein the access stratum configuration indicates parameters associated with a radio resource control (RRC) state operation; and receive or transmit control plane or user plane traffic associated with the remote UE via the one or more bearers.

[0018] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a relay UE, may cause the one or more processors to: establish a unicast link between the relay UE and a remote UE via a sidelink signaling interface; relay messages associated with establishing a connection between the remote UE and a base station via the unicast link; establish one or more sidelink access stratum entities for one or more bearers associated with the connection of the remote UE with the remote UE based at least in part on a sidelink access stratum configuration; establish one or more radio access stratum entities for one or more bearers associated with the connection of the remote UE with the base station based at least in part on a radio access stratum configuration received by the relay UE; and relay control plane or user plane traffic between the remote UE and the base station via the one or more sidelink access stratum entities and the one or more radio access stratum entities.

[0019] In some aspects, a device for wireless communication may include: a device for establishing a unicast link between the device and a relay UE via a sidelink signaling interface; a device for establishing a connection with a base station via the relay UE, wherein messages associated with establishing the connection are communicated via the unicast link; a device for establishing one or more bearers based at least in part on a radio bearer configuration received from the base station via the connection; a device for establishing one or more sidelink access stratum entities for the one or more bearers with the relay UE using one or more sidelink radio resource control messages based at least in part on an access stratum configuration received from the base station via the connection; and a device for receiving or transmitting control plane or user plane traffic via the one or more bearers.

[0020] In some aspects, an apparatus for wireless communication may include: a device for establishing a connection with a remote UE via a relay UE, wherein a message associated with establishing the connection is communicated via a unicast link between the remote UE and the relay UE; a device for transmitting a radio bearer configuration and an access stratum configuration for one or more bearers via the connection, wherein the access stratum configuration is for one or more sidelink access stratum entities of the remote UE and the relay UE, and wherein the access stratum configuration indicates parameters associated with a radio resource control (RRC) state operation; and a device for receiving or transmitting control plane or user plane traffic associated with the remote UE via the one or more bearers.

[0021] In some aspects, an apparatus for wireless communication may include: a device for establishing a unicast link between the device and a remote UE via a sidelink signaling interface; a device for relaying messages associated with establishing a connection between the remote UE and a base station via the unicast link; a device for establishing with the remote UE one or more sidelink access stratum entities for one or more bearers associated with the connection for the remote UE based at least in part on a sidelink access stratum configuration; a device for establishing with the base station one or more radio access stratum entities for one or more bearers associated with the connection for the remote UE based at least in part on a radio access stratum configuration received by the device; and a device for relaying control plane or user plane traffic between the remote UE and the base station via the one or more sidelink access stratum entities and the one or more radio access stratum entities.

[0022] In some aspects, a wireless communication method performed by a remote UE includes: communicating a radio access connection establishment message with a network entity via a relay UE on a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE; receiving a radio bearer configuration for one or more bearers from the network entity via a radio access connection, the radio access connection being established at least in part based on the radio access connection establishment message; receiving an access stratum configuration via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers; and receiving or transmitting control plane or user plane traffic via the one or more bearers based at least in part on the access stratum configuration.

[0023] In some aspects, a wireless communication method performed by a network entity includes: establishing a radio access connection with a remote UE via a relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated via an established sidelink unicast link between the remote UE and the relay UE; transmitting a radio bearer configuration and an access stratum configuration for one or more bearers via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configuring the remote UE and the relay UE, and wherein the access stratum configuration at least indicates parameters associated with RRC state operations; and receiving or transmitting control plane or user plane traffic associated with the remote UE via the one or more bearers based at least in part on the access stratum configuration.

[0024] In some aspects, a wireless communication method performed by a relay UE includes: relaying a radio access connection establishment message associated with establishing a radio access connection between a remote UE and a network entity via an established sidelink unicast link with the remote UE via a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via the established sidelink unicast link; receiving a sidelink access stratum configuration for one or more bearers associated with the radio access connection for the remote UE, wherein the sidelink access stratum configuration is associated with one or more sidelink access stratum entities; receiving a radio access stratum configuration for one or more bearers associated with the connection for the remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with the network entity; and relaying control plane or user plane traffic between the remote UE and the network entity via the one or more bearers.

[0025] In some aspects, a remote UE for wireless communication may include: a memory; and one or more processors operably coupled to the memory, the memory and the one or more processors being configured to: communicate a radio access connection establishment message with a network entity via a relay UE on a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE; receive a radio bearer configuration for one or more bearers from the network entity via a radio access connection, the radio access connection being established at least in part based on the radio access connection establishment message; receive an access stratum configuration via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers; and receive or transmit control plane or user plane traffic via the one or more bearers based at least in part on the access stratum configuration.

[0026] In some aspects, a network entity for wireless communications may include: a memory; and one or more processors operably coupled to the memory, the memory and the one or more processors being configured to: establish a radio access connection with a remote UE via a relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated via an established sidelink unicast link between the remote UE and the relay UE; transmit a radio bearer configuration and an access stratum configuration for one or more bearers via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configuring the remote UE and the relay UE, and wherein the access stratum configuration at least indicates parameters associated with RRC state operations; and receive or transmit control plane or user plane traffic associated with the remote UE via the one or more bearers based at least in part on the access stratum configuration.

[0027] In some aspects, a relay UE for wireless communication may include: a memory; and one or more processors operably coupled to the memory, the memory and the one or more processors being configured to: relay a radio access connection establishment message associated with establishing a radio access connection between a remote UE and a network entity via an established sidelink unicast link with the remote UE via a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via the established sidelink unicast link; receive a sidelink access stratum configuration for one or more bearers associated with the radio access connection for the remote UE, wherein the sidelink access stratum configuration is associated with one or more sidelink access stratum entities; receive a radio access stratum configuration for one or more bearers associated with the connection for the remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with the network entity; and relay control plane or user plane traffic between the remote UE and the network entity via the one or more bearers.

[0028] In some aspects, a non-transitory computer-readable medium stores an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a remote UE, causes the UE to: communicate a radio access connection establishment message with a network entity via a relay UE on a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE; receive a radio bearer configuration for one or more bearers from the network entity via a radio access connection, the radio access connection being established at least in part based on the radio access connection establishment message; receive an access stratum configuration via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers; and receive or transmit control plane or user plane traffic via the one or more bearers based at least in part on the access stratum configuration.

[0029] In some aspects, a non-transitory computer-readable medium stores an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a network entity, causes the network entity to: establish a radio access connection with a remote UE via a relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated via an established sidelink unicast link between the remote UE and the relay UE; transmit a radio bearer configuration and an access stratum configuration for one or more bearers via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configuring the remote UE and the relay UE, and wherein the access stratum configuration at least indicates parameters associated with RRC state operations; and receive or transmit control plane or user plane traffic associated with the remote UE via the one or more bearers based at least in part on the access stratum configuration.

[0030] In some aspects, a non-transitory computer-readable medium stores an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a relay UE, causes the UE to: relay, via a first signaling radio bearer, a radio access connection establishment message associated with establishing a radio access connection between the remote UE and a network entity via an established sidelink unicast link with the remote UE, the first signaling radio bearer being configured with a sidelink logical channel for communication via the established sidelink unicast link; receive a sidelink access stratum configuration for one or more bearers associated with the radio access connection for the remote UE, wherein the sidelink access stratum configuration is associated with one or more sidelink access stratum entities; receive a radio access stratum configuration for one or more bearers associated with the connection for the remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with the network entity; and relay control plane or user plane traffic between the remote UE and the network entity via the one or more bearers.

[0031] In some aspects, an apparatus for wireless communications includes: a device for communicating a radio access connection establishment message with a network entity via a relay UE on a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE; a device for receiving a radio bearer configuration for one or more bearers from the network entity via a radio access connection, the radio access connection being established at least in part based on the radio access connection establishment message; a device for receiving an access stratum configuration via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers; and a device for receiving or transmitting control plane or user plane traffic via the one or more bearers based at least in part on the access stratum configuration.

[0032] In some aspects, an apparatus for wireless communication includes: a device for establishing a radio access connection with a remote UE via a relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated via an established sidelink unicast link between the remote UE and the relay UE; a device for transmitting a radio bearer configuration and an access stratum configuration for one or more bearers via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configuring the remote UE and the relay UE, and wherein the access stratum configuration at least indicates parameters associated with RRC state operations; and a device for receiving or transmitting control plane or user plane traffic associated with the remote UE via the one or more bearers based at least in part on the access stratum configuration.

[0033] In some aspects, an apparatus for wireless communication includes: a device for relaying a radio access connection establishment message associated with establishing a radio access connection between a remote UE and a network entity via an established sidelink unicast link with the remote UE via a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via the established sidelink unicast link; a device for receiving a sidelink access stratum configuration for one or more bearers associated with the radio access connection for the remote UE, wherein the sidelink access stratum configuration is associated with one or more sidelink access stratum entities; a device for receiving a radio access stratum configuration for one or more bearers associated with the connection for the remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with the network entity; and a device for relaying control plane or user plane traffic between the remote UE and the network entity via the one or more bearers.

[0034] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to and as illustrated in the accompanying figures and specification.

[0035] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0038] Figure 1 is a block diagram illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0039] Figure 2 is a block diagram illustrating an example of a base station and a UE in communication in a wireless communication network according to various aspects of the present disclosure.

[0040] Figure 3 is a diagram illustrating an example of a control plane protocol architecture for UE-to-network layer 2 relay in accordance with various aspects of the present disclosure.

[0041] Figure 4 is a diagram illustrating an example of a user plane protocol architecture for UE-to-network layer 2 relay in accordance with various aspects of the present disclosure.

[0042] Figure 5 is a diagram illustrating an example of a configuration for UE-to-network layer 2 relay communications using encapsulated radio resource control messages in accordance with various aspects of the present disclosure.

[0043] Figure 6 is a diagram illustrating an example of a configuration for UE-to-network layer 2 relay communications using unencapsulated radio resource control messages in accordance with various aspects of the present disclosure.

[0044] Figure 7-12 is a diagram illustrating an example process performed, for example, by a user equipment or a network device, according to various aspects of the present disclosure.

[0045] Fig.13 , 15 17 are data flow diagrams illustrating examples of data flow between different components in an example device according to various aspects of the present disclosure.

[0046] Fig.14 , 16 18 are diagrams illustrating examples of hardware implementations for devices employing processing systems according to various aspects of the present disclosure.

[0047] Detailed Description

[0048] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0049] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0050] It should be noted that while various aspects may be described herein using terminology generally associated with 5G or NR radio access technologies (RATs), various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or RATs after 5G (e.g., 6G).

[0051] Figure 1 1 is a diagram illustrating an example of a wireless network 100. The wireless network 100 may be a 5G (NR) network and / or an LTE network, etc. or may include elements thereof. The wireless network 100 may include several BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as an NRBS, a B node, a gNB, a 5G B node (NB), an access point, a transmission reception point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0052] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" may be used interchangeably herein.

[0053] In some aspects, the cell may not necessarily be stationary, and the geographic area of ​​the cell may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections or virtual networks) using any suitable transport network.

[0054] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , relay BS 110d may communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS may also be referred to as a relay station, relay base station, relay, or the like.

[0055] The wireless network 100 may be a heterogeneous network including different types of BSs, such as a macro BS, a pico BS, a femto BS, a relay BS, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0056] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly via a wireless or wired backhaul.

[0057] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UEs may also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0058] Some UEs may be considered as machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network) via, for example, a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120, such as a processor component, a memory component, and the like. In some aspects, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0059] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0060] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols), mesh networks, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0061] The devices of the wireless network 100 can communicate using an electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 can communicate using an operating band having a first frequency range (FR1) and / or can communicate using an operating band having a second frequency range (FR2), the first frequency range (FR1) can span 410 MHz to 7.125 GHz, and the second frequency range (FR2) can span 24.25 GHz to 52.6 GHz. Frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a "sub-6 GHz" band. Similarly, FR2 is often referred to as a "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise specifically stated, it should be understood that the terms "sub-6 GHz" and the like, if used herein, may broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specifically stated, it should be understood that the terms "millimeter wave" and the like, if used herein, may broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0062] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described in Figure 1 Examples described.

[0063] Figure 2 is a diagram illustrating an example 200 of a base station 110 and a UE 120 in communication in a wireless network 100 in accordance with various aspects of the present disclosure. The base station 110 may be equipped with T antennas 234a through 234t, and the UE 120 may be equipped with R antennas 252a through 252r, where in general T≥1 and R≥1.

[0064] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, position coding may be used to generate synchronization signals to convey additional information.

[0065] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a channel quality indicator (CQI) parameter, etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0066] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 as well as other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and provide decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0067] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) of the base station 110 may perform one or more techniques associated with UE-to-network layer 2 relay, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) may perform or direct e.g. Figure 7 The process 700 Figure 8 The process of 800 Fig. 9 The process of 900 Fig.10 The process of 1000 Fig.11 Process 1100, Fig.12 1200, and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include: a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions (e.g., code and / or program code), when executed by one or more processors of base station 110 and / or UE 120, may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example, Figure 7 The process 700 Figure 8 The process of 800 Fig. 9 The process of 900 Fig.10 The process of 1000 Fig.11 Process 1100, Fig.12 The process 1200 of , and / or operations of other processes as described herein. In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc. The scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0068] although Figure 2 The blocks in the 200 and 210 are illustrated as different components, but the functions described above with respect to these blocks may be implemented with a single hardware, software, or combined component or various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0069] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described in Figure 2 Examples described.

[0070] A UE (referred to herein as a relay user equipment or relay UE) may relay communications from another UE (referred to herein as a remote user equipment or remote UE) to a network or from a network to a remote UE. In some aspects, a relay UE may perform a layer 2 relay from a UE to a network, where an adaptation layer in a layer 2 stack of the relay UE performs forwarding of communications to the remote UE, compared to a layer 3 relay that may occur in an Internet Protocol (IP) layer. Communications between a relay UE and a remote UE may be referred to herein as sidelink communications. In some UE-to-network layer 2 relay applications, a packet data convergence protocol (PDCP) end-to-end connection may be used to transparently transfer non-access stratum (NAS) and RRC messages between a remote UE and a network.

[0071] The ProSe sidelink (PC5) interface may provide a sidelink interface between UEs. For example, V2X communication according to NR Release 16 may be performed using a PC5 unicast control plane stack, which may include a PC5 signaling (PC5-S) interface and a PC5 access layer (AS) (PC5-AS) interface (such as a PC5-RRC interface). Each UE communicating using the PC5 interface may configure a unicast link context and exchange AS information using the PC5-S interface and the PC5-RRC interface. Each UE may be associated with a PC5 user plane stack, which may include, for example, a PC5-Service Data Adaptation Protocol (SDAP) entity, a PC5-PDCP entity, and the like.

[0072] If layer 2 relaying is performed via certain sidelink user plane entities (such as PC5-PDCP or PC5-SDAP) of the relay UE and / or the remote UE, higher layer resources of the relay UE and / or the remote UE may be consumed in conjunction with the layer 2 relaying, thereby increasing latency and computational resource consumption. In addition, using the sidelink user plane entity to perform layer 2 relaying may put pressure on the capacity of the sidelink between the UEs. Further, the procedures for communication involved in setting up an RRC connection between the remote UE and the network via the relay UE may not be well defined.

[0073] Some of the techniques and devices described herein provide signaling schemes and configurations for UE-to-network relay between a remote UE and a relay UE using a PC5 interface. For example, some of the techniques and devices described herein provide signaling schemes and configurations that do not use messages associated with establishing an RRC connection encapsulated in a PC5-S container, thereby alleviating dependence on the PC5-S interface and reducing resource consumption of the PC5-S entity. In addition, some of the techniques and devices described herein provide, for example, a scheme for user plane architecture and communication between a relay UE and a remote UE without using PC5-SDAP or PC5-PDCP entities of the relay UE and the remote UE, thereby saving computing resources of the relay UE and the remote UE.

[0074] Figure 3 is a diagram illustrating an example of a control plane protocol architecture 300 for UE-to-network layer 2 relay using Uu bearers that are not handled by a sidelink signaling entity or a sidelink radio resource control entity (such as bearers that bypass the sidelink signaling entity or the sidelink radio resource control entity) in accordance with various aspects of the present disclosure. Figure 4 4 is a diagram illustrating an example of a user plane protocol architecture 400 for layer 2 relay of a UE to a network using Uu bearers not handled by a sidelink signaling entity or a sidelink radio resource control entity (such as bearers that bypass the sidelink signaling entity or the sidelink radio resource control entity) according to various aspects of the present disclosure. For example, the control plane protocol architecture 300 and the user plane protocol architecture 400 may correspond to a remote UE (e.g., UE 120) shown by reference numerals 305 and 405 and a relay UE (e.g., UE 120) shown by reference numerals 310 and 410.

[0075] like Figure 3 As shown, in the control plane, there may be a PC5 interface (e.g., a side link interface) between the remote UE and the relay UE, a Uu interface between the relay UE and the next generation radio access network (NG-RAN, also referred to herein as a 5G access network (5G-AN)), an N2 interface between the NG-RAN and an access and mobility management function (AMF) of the control plane protocol architecture 300, and an N11 interface between the AMF and a session management function (SMF). One or more of the NG-RAN, AMF, SMF, or another device (e.g., BS 110) may be referred to herein as a network entity.

[0076] like Figure 4 As shown, there may be an N3 interface between the NG-RAN and the user plane function (UPF) of the user plane protocol architecture 400 and an N6 interface between the UPF and the core network (CNW).

[0077] As further shown, the remote UE and the relay UE may be associated with corresponding PC5 protocol stacks 315 / 320 and 415 / 420, thereby enabling communication between the remote UE and the relay UE on the PC5 interface. The PC5 protocol stack may include a PC5 radio link control (RLC) component, a PC5 media access control (MAC) component, a PC5 physical (PHY) component, etc. The communication between the remote UE and the relay UE using the PC5 interface may be referred to as side link communication. The corresponding PC5 protocol stack may be associated with one or more of a PC5-S entity, a PC5-RRC entity, or a PC5-PDCP entity, as shown by reference numeral 325. The PC5-S entity may manage a side link signaling interface, such as a PC5-S interface.

[0078] If Figure 3 As shown in the reference numeral 330, the remote UE is associated with a non-access layer (NAS) stack, which includes a NAS session management (NAS-SM) component, a NAS session management (NAS-SM) component, and one or more radio access components (e.g., an NR-RRC component and an NR-PDCP component). Figure 4 As shown by reference numeral 335, the relay UE is associated with a radio access stack, which includes an NR-RLC component, an NR-MAC component, and an NR-PHY component. In addition, the NG-RAN is associated with a radio access interface stack shown by reference numeral 340, which includes an NR-RLC component, an NR-MAC component, an NR-PHY component, an NR-RRC entity, and an NR-PDCP entity.

[0079] The adaptation layer entity of the relay UE as shown by reference numeral 345 may handle the relay from the remote UE to the network or from the network to the remote UE. As used herein, "network" may refer to any one or more of NG-RAN, AMF, SMF, UPF, or core network. In some aspects, the adaptation layer is referred to as an adaptation layer entity. In some aspects, the adaptation layer entity may be a separate entity between the radio link control entity and the packet data convergence entity. In some aspects, the adaptation layer entity may be logically part of the packet data convergence entity or the radio link control entity.

[0080] Communications between the various stacks of the remote UE are indicated by the lines shown in reference numeral 350. The lines between the NR-PDCP entity and the PC5-RLC entity indicate how messages that are not encapsulated in a sidelink signaling container (such as a PC5-S container) (e.g., NR RRC messages generated by the radio access protocol stack) can be communicated from the radio access stack to the PC5 stack for transmission via the sidelink interface, or how messages that are not encapsulated in a PC5-S container can be communicated from the PC5 stack to the radio access stack after being received via the sidelink interface. Note that the lines between the NR-PDCP entity and the PC5-RLC entity do not involve the PC5-S or PC5-PDCP entities, meaning that the PC5-S and PC5-PDCP entities do not handle such messages. Similar lines are shown to indicate communications between the adaptation layer and the PC5-RLC entity that bypass the PC5-S and PC5-PDCP entities of the relay UE. This, in conjunction with Figure 6 Describe in more detail.

[0081] The lines between the NR-PDCP entity and the PC5-S or PC5 / RRC entity indicate how messages encapsulated in PC5-S containers (e.g., NR RRC messages generated by the radio access protocol stack) can be communicated from the radio access stack to the PC5 stack for transmission via the side link interface, or how messages encapsulated in PC5-S containers can be communicated from the PC5 stack to the radio access stack after being received via the side link interface. Note that the lines between the NR-PDCP entity and the PC5-RLC entity involve the PC5-S entity, which means that the PC5-S entity can handle such messages. This is combined with Figure 5 Describe in more detail.

[0082] If Figure 4 As shown by reference numeral 425, the remote UE is associated with a user plane protocol stack, which may include an application (APP) component, a protocol data unit (PDU) component, an NR-SDAP component, and an NR-PDCP component. In addition, the NG-RAN is associated with a user plane component shown by reference numeral 430, which includes an NR-SDAP component and an NR-PDCP component. The NR-SDAP component and the NR-PDCP component may be referred to as a radio access entity in this document.

[0083] NR user plane traffic (shown by the line indicated by "NR UP") may be transmitted between the NR-PDCP entity and the PC5-RLC component, as shown by reference numeral 435. Such NR user plane traffic may be transmitted via a NR-PDCP entity as shown in conjunction with the PC5-RLC component. Figure 5 and 6 The one or more bearers (such as data radio bearers (DRBs) or signaling radio bearers (SRBs)) established as described are transmitted to the relay UE. As indicated by reference numeral 440, NR user plane traffic may be provided from the PC5 stack of the relay UE to the adaptation component, and from the adaptation component to the radio access stack of the relay UE. The radio access stack of the relay UE may provide the NR user plane traffic to the NG-RAN (not shown). This is combined with Figure 5 and 6 Sidelink communications, such as PC5 control messaging, etc., may occur between the remote UE and the PC5-SDAP components of the relay UE, as shown by reference numeral 445 .

[0084] As indicated above, Figure 3 and 4 are provided as examples. Other examples may differ from those described in Figure 3 and 4 The content described.

[0085] Figure 55 is a diagram illustrating an example 500 of a configuration of a layer 2 relay communication of a UE to a network using encapsulated radio resource control messages according to various aspects of the present disclosure. As shown, example 500 includes a remote UE (e.g., UE 120, remote UE 305, or remote UE 405), a relay UE (e.g., UE 120, relay UE 310, or relay UE 410), and a BS (e.g., BS 110). In some aspects, one or more operations described as being performed by a BS in example 500 may be performed by a network entity. The network entity may include, for example, a BS, NG-RAN, UPF, SMF, AMF, core network equipment, etc.

[0086] As in Figure 5 In and as shown by reference numeral 510, the remote UE and the relay UE can establish a unicast link (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receiving processor 258, controller / processor 280, transmitting processor 264, TXMIMO processor 266, MOD 254, antenna 252, etc.). For example, the corresponding PC5-S entities (e.g., side link signaling entities) of the remote UE and the relay UE can be used to establish a unicast link between the remote UE and the relay UE on the PC5 link (e.g., associated with the side link signaling interface). In some aspects, the remote UE and the relay UE can establish an access stratum (AS) configuration for the PC5 link. For example, the corresponding PC5-RRC entities of the remote UE and the relay UE can be used to establish an AS configuration for a unicast link (e.g., PC5 link). In this case, the BS can modify the PC5-AS stack configuration for the unicast link. Once the unicast link is established, the unicast link can be referred to as an established side link unicast link in this article.

[0087] As indicated by reference numeral 520, the remote UE (e.g., using the controller / processor 280, the transmit processor 264, the TX MIMO processor 266, the MOD 254, the antenna 252, etc.) may provide a message in a PC5-S container to the relay UE, and the relay UE (e.g., using the controller / processor 280, the transmit processor 264, the TX MIMO processor 266, the MOD 254, the antenna 252, etc.) may provide the message to the BS. For example, the message may be provided via a unicast link. In this case, the message may be provided in a PC5-S message on the same PC5 bearer (e.g., the same PC5 SRB) used for PC5-S messages between the remote UE and the relay UE. As further shown, the message may include an RRC message, such as an NR RRC message associated with establishing an RRC connection. In some aspects, the message may be handled by the NR-PDCP entity and the PC5-S entity of the remote UE, such as by Figure 3As shown by the line between the NR-PDCP entity and the PC5-S entity indicated by the reference numeral 350.

[0088] In example 500, the message from the remote UE is encapsulated in a PC5-S container. Thus, the PC5-S entity of the remote UE (in Figure 3 ) may handle the communication of the message. The PC5-S entity of the relay UE may determine, at least in part based on the information included in the PC5-S message, that the message is a remote UE NR RRC message, and may forward the message to the adaptation layer entity of the relay UE for forwarding to the BS on the Uu link. In this case, the NR control plane traffic may be handled by two PDCPs (e.g., NR-PDCP and PC5-PDCP associated with a protocol stack including NR-RRC, NR-PDCP, PC5-S, PC5-PDCP, PC5-RLC, PC5-MAC, and PC5-PHY). In addition, the NR user plane traffic of the remote UE may be handled by NR-PDCP and PC5-PDCP, which may be associated with a protocol stack including NR-SDAP, NR-PDCP, PC5-SDAP, PC5-PDCP, PC5-RLC, PC5-MAC, and PC5-PHY.

[0089] As shown by reference numeral 530, the remote UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receiving processor 258, controller / processor 280, etc.) may receive a PC5-S container including an RRC message from the BS and via the relay UE, such as an RRC setup message or an RRC reconfiguration message. As shown by reference numeral 540, the remote UE may establish or reconfigure an RRC connection with the BS via the relay UE according to the RRC message. In some aspects, the remote UE may receive the RRC reconfiguration message after establishing the RRC connection. As further shown, the RRC message may include an AS configuration for one or more SRBs and / or one or more DRBs on the PC5 interface and the Uu interface. For example, one or more SRBs and / or one or more DRBs may be configured for communication between the remote UE and the BS without overloading the PC5-S SRBs between the remote UE and the relay UE, thereby saving resources of the relay UE. In some aspects, one or more SRBs and / or one or more DRBs are collectively referred to as "one or more bearers".

[0090] In some aspects, the AS configuration may include a radio bearer configuration or may be received in association with the radio bearer configuration. For example, the AS configuration may include a radio bearer configuration for one or more Uu SRBs and / or DRBs, including an NR-PDCP configuration, an NR-SDAP configuration, a security configuration, and the like. In some aspects, the AS configuration may include a discontinuous reception configuration, an inactivity timer, and the like. For example, an NR RRC Uu information element (IE) may indicate a PC5 radio bearer configuration, a PC5-SDAP configuration, a PC5-PDCP configuration, a security configuration for a unicast link or another PC5 link, and the like. As another example, the IE may indicate a PC5 AS configuration (e.g., a side link access layer configuration) for one or more DRBs and / or SRBs. As yet another example, the PC5 AS configuration IE may indicate a logical channel configuration (e.g., an RLC configuration, a MAC configuration, a PHY configuration, etc.) corresponding to one or more DRBs and / or SRBs to be added or modified. The above configuration may provide for using NR-PDCP, PC5-RLC, PC5-MAC, and PC5-PHY entities for routing NR control plane traffic for remote UEs and using NR-SDAP, NR-PDCP, PC5-RLC, PC5-MAC, and PC5-PHY components for routing NR user plane traffic for remote UEs. Thus, subsequent NR RRC or NAS messages may be communicated via one or more SRBs and / or DRBs, thereby reducing the load on the PC5-SSRBs. In some aspects, the access stratum configuration may be received separately from the radio bearer configuration.

[0091] As indicated by reference numeral 550, BS 110 may provide an RRC message, such as an RRC reconfiguration message, to UE 120. The RRC reconfiguration message may include sidelink AS configuration information (e.g., configuration information of one or more sidelink entities for a sidelink between a remote UE and a relay UE, such as configuration information for one or more logical channels associated with relay traffic), radio AS configuration information (e.g., for a radio access link between a BS and a relay UE), Uu relay access hierarchy configuration, specific radio bearer configuration, specific access hierarchy configuration, etc. The relay UE may configure the sidelink and / or the radio link with the BS according to the RRC message.

[0092] In some aspects, an RRC message for establishing (e.g., configuring) an RRC connection while transitioning from an idle mode state (e.g., RRC_idle, referred to as RRC idle state operation) to a connected mode state (e.g., RRC_connected, referred to as RRC connected state operation) or from an inactive mode state (e.g., RRC_inactive, referred to as RRC inactive state operation) to a connected mode state may be transmitted on a preconfigured SRB or on a PC5-S / PC5-RRC SRB (e.g., without encapsulation or with encapsulation). Subsequently, after the BS has configured SRBs / DRBs for relay operation, RRC messages (such as CP traffic) may be transmitted on the configured SRBs.

[0093] As indicated by reference numeral 560, the remote UE and the relay UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, etc.) may configure one or more SRBs and / or one or more DRBs between NR-PDCP and PC5-RLC. For example, the remote UE and the relay UE may configure one or more SRBs and / or one or more DRBs according to the above configuration information. In some aspects, the configuration indicated by reference numeral 560 may refer to an initial configuration (e.g., establishment). In some aspects, the configuration indicated by reference numeral 560 may refer to a reconfiguration of at least one bearer in one or more SRBs and / or one or more DRBs. In some aspects, "configuring a bearer" may refer to configuring an NR-SDAP and / or NR-PDCP entity for a bearer, mapping a PC5 logical channel to a bearer, etc. In addition, the PC5-RLC component of the remote UE can be configured to handle the NR-PDCP protocol data unit (PDU) format, which can enable the handling of NR control plane and user plane PDCP PDUs.

[0094] As indicated by reference numeral 570, the remote UE and the BS (e.g., using the controller / processor 280, the transmit processor 264, the TX MIMO processor 266, the MOD 254, the antenna 252, the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, etc.) may communicate via the relay UE using one or more SRBs and / or one or more DRBs. For example, the NR-PDCP entity and the PC5-RLC component of the remote UE may handle the user plane communications of the remote UE, as indicated by Figure 4As shown in the reference numeral 435 of FIG. Thus, the remote UE and the BS may configure one or more bearers separate from the PC5-S bearer of the remote UE for communication via the relay UE. This reduces the load on the PC5-S bearer and saves computing resources of the relay UE.

[0095] In some aspects, the BS (e.g., using the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, etc.) may configure a bearer for the PC5 interface between the remote UE and the relay UE. For example, the bearer may be used for sidelink communications between the remote UE and the relay UE, such as by Figure 4 445. In this case, in some aspects, such communications may not be relayed to the BS. The BS may provide the configuration for the bearer to the remote UE via one or more NR RRC messages, which may include one or more IEs for PC5 radio bearer configuration and PC5 access layer configuration, which are described in more detail above. The bearer may be handled by the PC5-SDAP entity and / or PC5-PDCP entity of the remote UE and / or the relay UE, and may be provided to the PC5-RLC / PC5-MAC / PC5-PHY entity for sidelink communication between the remote UE and the relay UE.

[0096] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described herein. Figure 5 Examples described.

[0097] Figure 6 600 is a diagram illustrating a configuration of a UE-to-network layer 2 relay communication using unencapsulated radio resource control messages according to various aspects of the present disclosure. As shown, example 600 includes a remote UE (e.g., UE 120, remote UE 305, or remote UE 405), a relay UE (e.g., UE 120, relay UE 310, or relay UE 410), and a BS (e.g., BS 110). In some aspects, one or more operations described as being performed by a BS may be performed by a network entity. The network entity may include, for example, a BS, NG-RAN, UPF, SMF, AMF, core network equipment, etc.

[0098] As in Figure 6 In the example and as indicated by reference numeral 610, the remote UE may establish a unicast link with the relay UE. Figure 5 Describe in more detail.

[0099] As indicated by reference numeral 620, the remote UE may provide an unencapsulated message to the relay UE, and the relay UE may forward the unencapsulated message to the BS. As indicated by reference numeral 630, the remote UE may receive an unencapsulated message from the BS via the relay UE, including an RRC setup message or an RRC reconfiguration message. An unencapsulated message may be referred to herein as a radio access connection establishment message, and may carry information associated with establishing a connection (e.g., a radio access connection) (which may be referred to herein as a radio access connection). For example, the unencapsulated message may not be encapsulated in a PC5-S container (e.g., a container based at least in part on the PC5-S protocol) or a message. In this case, the unencapsulated message may be communicated on an SRB (such as SRB0 associated with radio resource control message transceiving) handled by an NR-PDCP entity of the remote UE and / or the relay UE. In some aspects, the SRB is referred to herein as a first SRB. In some aspects, the SRB may be associated with one or more logical channels configured for operation with the PC5-RLC / MAC / PHY stack, such as one or more logical channels configured for NR RRC message transceiving. In this case, the one or more logical channels may be pre-configured or defined, for example, before the message is communicated (e.g., in a wireless communication standard, as configured by a manufacturer or vendor, etc.). Logical channels configured for operation with the PC5-RLC / MAC / PHY stack may be referred to herein as sidelink logical channels.

[0100] As shown, the unencapsulated message may carry the AS configuration. As mentioned above, the AS configuration may include or may be associated with the radio bearer configuration. For example, the BS may transmit the AS configuration and the radio bearer configuration to the remote UE via the relay UE.

[0101] On the uplink, the message on one or more logical channels may be received by the PC5-RLC component of the relay UE, and the PC5-RLC component may pass the message to the adaptation layer entity of the relay UE. The adaptation layer may pass the message to the NR-RLC component of the relay UE, and the NR-RLC component may relay the message to the NG-RAN (e.g., the NR-RLC component of the NG-RAN) on the Uu link. On the downlink, the NR-RLC component of the relay UE may receive the message, and the NR-RLC component may pass the message to the adaptation layer entity of the relay UE. The adaptation layer entity may pass the message to the PC5-RLC component of the relay UE, and the PC5-RLC component may relay the message to the remote UE.

[0102] After the communication of the RRC message (e.g., RRC setup request, RRC setup message, and / or RRC reconfiguration message), the remote UE, the relay UE, and the BS may establish and / or reconfigure an RRC connection, as indicated by reference numeral 640. An RRC connection may be referred to herein as a radio access connection or connection. In some aspects, the BS may provide an RRC message (such as an RRC reconfiguration message) to the relay UE, as indicated by reference numeral 650. The RRC reconfiguration message may include an AS configuration and / or a radio bearer configuration, such as sidelink AS configuration information (e.g., configuration information of one or more sidelink entities for a sidelink between the remote UE and the relay UE), radio AS configuration information (e.g., for a radio access link between the BS and the relay UE), Uu relay access layer configuration, etc. The relay UE may configure the sidelink and / or the radio link with the BS according to the RRC message.

[0103] As indicated by reference numeral 660, the remote UE and the relay UE may configure one or more SRBs and / or DRBs based at least in part on the AS configuration information included in the unencapsulated message indicated by reference numeral 630. As indicated by reference numeral 670, the remote UE and the BS may communicate via the one or more SRBs and / or DRBs. These operations are combined with Figure 5 Figure numerals 540, 550, 560 and 570 are described in more detail.

[0104] As indicated above, Figure 6 are provided as examples. Other examples may differ from those described herein. Figure 6 Examples described.

[0105] Figure 7 is a diagram illustrating an example process 700, performed, for example, by a remote UE, in accordance with various aspects of the present disclosure. Example process 700 is an example in which a remote UE (eg, UE 120, etc.) performs operations associated with layer 2 relay of user equipment to a network.

[0106] like Figure 7 As shown in , in some aspects, process 700 may include establishing a unicast link between a remote UE and a relay UE via a sidelink signaling interface (block 710). For example, a remote UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may establish a unicast link between the remote UE and the relay UE via a sidelink signaling interface, as described above.

[0107] like Figure 7As further shown in FIG. 7 , in some aspects, process 700 may include establishing a connection with a base station via a relay UE, wherein messages associated with establishing the connection are communicated via a unicast link (block 720). For example, a remote UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may establish a connection with a base station via a relay UE, as described above. In some aspects, messages associated with establishing the connection are communicated via a unicast link.

[0108] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include establishing one or more bearers based at least in part on a radio bearer configuration received from a base station via the connection (block 730). For example, a remote UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may establish one or more bearers based at least in part on a radio bearer configuration received from a base station via the connection, as described above.

[0109] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include establishing one or more sidelink access stratum entities for the one or more bearers with the relay UE using one or more sidelink radio resource control messages based at least in part on an access stratum configuration received from the base station via the connection (block 740). For example, the remote UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may establish one or more sidelink access stratum entities for the one or more bearers with the relay UE using one or more sidelink radio resource control messages based at least in part on an access stratum configuration received from the base station via the connection, as described above.

[0110] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include receiving or transmitting control plane or user plane traffic via the one or more bearers (block 750). For example, a remote UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, etc.) may receive or transmit control plane or user plane traffic via the one or more bearers, as described above.

[0111] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0112] In a first aspect, process 700 comprises communicating the message via a signaling radio bearer configured with one or more sidelink logical channels for communications associated with establishing a connection, wherein the signaling radio bearer is different from a signaling radio bearer used to configure the unicast link. In a second aspect, alone or in combination with the first aspect, the signaling radio bearer is handled by a radio access entity of the remote UE. In a third aspect, alone or in combination with one or more of the first and second aspects, the radio access entity comprises a control plane radio access packet data convergence protocol entity.

[0113] In a third aspect, either alone or in combination with one or more of the first and second aspects, the remote UE is associated with a sidelink signaling entity that handles a sidelink signaling interface, and the unicast link is established by the sidelink signaling entity. In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the message is communicated on one of the one or more sidelink logical channels, and the message is communicated without encapsulating the message in a sidelink signaling container. In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the message includes a radio resource control message associated with a transition from a radio resource control idle state or a radio resource control inactive state operation to a radio resource control connected state operation.

[0114] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the access stratum configuration is associated with a radio bearer configuration information element for one or more bearers, and the one or more bearers include at least one of a signaling radio bearer or a data radio bearer. In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the radio bearer configuration information element indicates at least one of: a configuration of a user plane radio access entity for a remote UE, a configuration of a control plane radio access entity for a remote UE, or a security configuration for one or more bearers.

[0115] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the access hierarchy configuration comprises information elements indicating a sidelink radio link control entity, a medium access control entity, and a physical layer entity configuration for one or more bearers. In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the one or more bearers are handled by a radio access packet data convergence protocol entity or a radio access service data adaptation protocol entity based at least in part on the radio bearer configuration information element.

[0116] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, a sidelink radio link control entity of a remote UE is configured to handle a protocol data unit format associated with a radio access packet data convergence protocol entity.

[0117] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, process 700 includes: receiving configuration information for a sidelink bearer between a remote UE and a relay UE; establishing a sidelink bearer for a unicast link with the relay UE using one or more sidelink radio resource control messages; and configuring the sidelink bearer according to the configuration information, wherein the sidelink bearer is handled by a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the remote UE.

[0118] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, an access stratum configuration is received with the message. In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the message is transmitted or received via a sidelink signaling interface. In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the message is encapsulated in a sidelink signaling container.

[0119] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, establishing a connection with a base station is based at least in part on a parameter indicating a discontinuous reception configuration or an inactivity timer of the remote UE, and wherein method 700 further includes maintaining a connection with the base station based at least in part on the parameter.

[0120] In the sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the message is transmitted or received without being encapsulated in a sidelink signaling container, the message is transmitted or received via a signaling radio bearer configured with one or more sidelink logical channels for communications associated with establishing a connection, the signaling radio bearer being different from the signaling radio bearer used to configure the unicast link and the signaling radio bearer being handled by a control plane radio access packet data convergence protocol entity.

[0121] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, control plane or user plane traffic bypasses a sidelink protocol data convergence protocol entity or a service data adaptation protocol entity of a remote UE.

[0122] although Figure 7 An example block diagram of process 700 is shown, but in some aspects, process 700 may include Figure 7Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 700. Additionally or alternatively, two or more blocks of the process 700 may be executed in parallel.

[0123] Figure 8 800 is a diagram illustrating an example process 800 performed, for example, by a base station in accordance with various aspects of the present disclosure. Example process 800 is an example in which a base station (e.g., base station 110, etc.) performs operations associated with layer 2 relay of user equipment to a network. In some aspects, the operations of example 800 may be performed by a network entity.

[0124] like Figure 8 As shown in , in some aspects, process 800 may include establishing a connection with a remote UE via a relay UE, wherein messages associated with establishing the connection are communicated via a unicast link between the remote UE and the relay UE (block 810). For example, a base station (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.) may establish a connection with a remote UE via a relay UE, as described above. In some aspects, messages associated with establishing the connection are communicated via a unicast link between the remote UE and the relay UE.

[0125] like Figure 8 As further shown in, in some aspects, process 800 may include transmitting a radio bearer configuration and an access stratum configuration for one or more bearers via the connection, wherein the access stratum configuration is for one or more sidelink access stratum entities of a remote UE and a relay UE, and wherein the access stratum configuration indicates parameters associated with a radio resource control (RRC) state operation (block 820). For example, a base station (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.) may transmit a radio bearer configuration and an access stratum configuration for one or more bearers via the connection, as described above. In some aspects, the access stratum configuration is for one or more sidelink access stratum entities of a remote UE and a relay UE. In some aspects, the access stratum configuration indicates parameters associated with a radio resource control (RRC) state operation.

[0126] like Figure 8As further shown in FIG. 8 , in some aspects, process 800 may include receiving or transmitting control plane or user plane traffic associated with a remote UE via the one or more bearers (block 830). For example, a base station (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, etc.) may receive or transmit control plane or user plane traffic associated with a remote UE via the one or more bearers, as described above.

[0127] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0128] In a first aspect, process 800 includes configuring a signaling radio bearer for the message before establishing a unicast link, wherein the signaling radio bearer is different from a signaling radio bearer used to configure the unicast link. In a second aspect, alone or in combination with the first aspect, the message includes a radio resource control message, and the message is transmitted without encapsulating the message in a sidelink signaling container. In a third aspect, alone or in combination with one or more of the first and second aspects, an access stratum configuration is transmitted together with the radio resource control message. In a fourth aspect, alone or in combination with one or more of the first to third aspects, the access stratum configuration includes information elements indicating a sidelink radio link control entity, a sidelink media access control entity, and a sidelink physical layer entity configuration for the one or more bearers.

[0129] In a fifth aspect, either alone or in combination with one or more of the first and fourth aspects, process 800 includes transmitting configuration information for a sidelink bearer between a remote UE and a relay UE, wherein the configuration information for the sidelink bearer is associated with configuring a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the remote UE to handle the sidelink bearer.

[0130] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and wherein the one or more bearers include at least one of a signaling radio bearer or a data radio bearer.

[0131] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the radio bearer configuration information element indicates at least one of: a configuration of a control plane radio access entity for a remote UE, a configuration of a user plane radio access entity for a remote UE, or a security configuration for the one or more bearers.

[0132] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the one or more bearers are handled by a Radio Access Packet Data Convergence Protocol entity or a Radio Access Service Data Adaptation Protocol entity.

[0133] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, a sidelink radio link control entity of a remote UE is configured to handle a protocol data unit format associated with a radio access packet data convergence protocol entity.

[0134] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, process 800 comprises transmitting a radio access stratum configuration provided via a radio resource control reconfiguration message to a relay UE, and wherein the radio resource control reconfiguration message comprises an adaptation layer entity configuration.

[0135] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, a radio access layer configuration indication is used for configuration of at least one of a radio link control entity, a media access control entity, a physical layer entity, or an adaptation layer entity. In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the adaptation layer entity is separate from the radio link control entity and the packet data convergence entity and is between the radio link control entity and the packet data convergence entity. In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the adaptation layer is part of the packet data convergence entity or the radio link control entity.

[0136] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, process 800 may include transmitting configuration information for a sidelink bearer between a remote UE and a relay UE, wherein the configuration for the sidelink bearer is associated with configuring a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the remote UE to handle the sidelink bearer.

[0137] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the message is encapsulated in a sidelink signaling container. In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, a parameter associated with the RRC state operation indicates a discontinuous reception configuration or an inactivity timer of the remote UE.

[0138] In a seventeenth aspect, either alone or in combination with one or more of aspects one to sixteen, the message is transmitted or received without being encapsulated in a sidelink signaling container, wherein the message is transmitted or received via a signaling radio bearer configured with one or more sidelink logical channels for communications associated with establishing a connection, wherein the signaling radio bearer is different from a signaling radio bearer used to configure the unicast link and wherein the signaling radio bearer is handled by a control plane radio access packet data convergence protocol entity.

[0139] although Figure 8 An example block diagram of process 800 is shown, but in some aspects, process 800 may include Figure 8 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 800. Additionally or alternatively, two or more blocks of process 800 may be executed in parallel.

[0140] Fig. 9 is a diagram illustrating an example process 900 performed, for example, by a relay UE in accordance with various aspects of the present disclosure. Example process 900 is an example in which a relay UE (eg, UE 120, etc.) performs operations associated with layer 2 relay of user equipment to a network.

[0141] like Fig. 9 As shown in , in some aspects, process 900 may include establishing a unicast link between the relay UE and the remote UE via a sidelink signaling interface (block 910). For example, the relay UE (e.g., using the controller / processor 280, the transmit processor 264, the TX MIMO processor 266, the MOD 254, the antenna 252, etc.) may establish a unicast link between the relay UE and the remote UE via a sidelink signaling interface, as described above.

[0142] like Fig. 9 As further shown in FIG. 9 , in some aspects, process 900 may include relaying messages associated with establishing a connection between a remote UE and a base station via the unicast link (block 920). For example, a relay UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may relay messages associated with establishing a connection between a remote UE and a base station via the unicast link, as described above.

[0143] like Fig. 9As further shown in FIG. 9 , in some aspects, process 900 may include establishing, with a remote UE, one or more sidelink access stratum entities for one or more bearers associated with the connection for the remote UE based at least in part on the sidelink access stratum configuration (block 930). For example, a relay UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may establish, with a remote UE, one or more sidelink access stratum entities for one or more bearers associated with the connection for the remote UE based at least in part on the sidelink access stratum configuration, as described above.

[0144] like Fig. 9 As further shown in FIG. 9 , in some aspects, process 900 may include establishing one or more radio access stratum entities for one or more bearers associated with the connection for the remote UE with the base station based at least in part on the radio access stratum configuration received by the relay UE (block 940). For example, the relay UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may establish one or more radio access stratum entities for one or more bearers associated with the connection for the remote UE with the base station based at least in part on the radio access stratum configuration received by the relay UE, as described above.

[0145] like Fig. 9 As further shown in FIG. 9 , in some aspects, process 900 may include relaying control plane or user plane traffic between a remote UE and a base station via the one or more sidelink access stratum entities and the one or more radio access stratum entities (block 950). For example, a relay UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may relay control plane or user plane traffic between a remote UE and a base station via the one or more sidelink access stratum entities and the one or more radio access stratum entities, as described above.

[0146] Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0147] In a first aspect, a sidelink access stratum configuration is associated with one or more logical channels associated with relay traffic, and the access stratum configuration is received from a remote UE via a sidelink radio resource control configuration.

[0148] In a second aspect, either alone or in combination with the first aspect, the sidelink access stratum configuration and the radio access stratum configuration are associated with one or more logical channels, and the access stratum configuration is received from a base station via a radio resource control reconfiguration message indicating access stratum configuration information for the one or more logical channels.

[0149] In a third aspect, alone or in combination with one or more of the first and second aspects, the radio access layer configuration indication is used for configuration of at least one of a radio link control entity, a media access control entity, a physical layer entity, or an adaptation layer entity. In a fourth aspect, alone or in combination with one or more of the first to third aspects, the adaptation layer entity is separate from the radio link control entity and the packet data convergence entity and is between the radio link control entity and the packet data convergence entity. In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the adaptation layer is part of the packet data convergence entity or the radio link control entity.

[0150] In the sixth aspect, alone or in combination with one or more of the first and fifth aspects, one or more side link access stratum entities are associated with relay traffic based at least in part on the configuration of the one or more side link access stratum entities, and relaying control plane or user plane traffic between a remote UE and a base station via the one or more side link access stratum entities and one or more radio access stratum entities further includes: forwarding the control plane or user plane traffic to an adaptation layer entity of the relay UE based at least in part on the association of the control plane or user plane traffic with the one or more side link access stratum entities.

[0151] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the one or more side link access stratum entities are associated with relay traffic based at least in part on a logical channel identifier associated with the one or more side link access stratum entities.

[0152] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, an adaptation layer entity of the relay UE forwards the control plane or user plane traffic from the one or more sidelink access stratum entities to the one or more radio access stratum entities based at least in part on the logical channel identifier. In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the relay UE is associated with a sidelink signaling entity that handles a sidelink signaling interface, and the unicast link is configured by the sidelink signaling entity.

[0153] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the message comprises a radio resource control message. .

[0154] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, process 900 includes: receiving configuration information for a sidelink bearer between a remote UE and a relay UE; using one or more sidelink radio resource control messages to establish a sidelink bearer for a unicast link with the relay UE; and configuring the sidelink bearer according to the configuration information, wherein the sidelink bearer is handled by a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the relay UE.

[0155] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the one or more bearers are associated with a user plane or control plane radio access entity of the remote UE. In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the message is encapsulated in a sidelink signaling container. In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the control plane or user plane traffic bypasses a sidelink protocol data convergence protocol entity or a service data adaptation protocol entity of the relay UE.

[0156] although Fig. 9 An example block diagram of process 900 is shown, but in some aspects, process 900 may include Fig. 9 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 900. Additionally or alternatively, two or more blocks of the process 900 may be executed in parallel.

[0157] Fig.10 is a diagram illustrating an example process 1000, performed, for example, by a remote UE, in accordance with various aspects of the present disclosure. Example process 1000 is an example in which a remote UE (eg, UE 120) performs operations associated with relaying of user equipment to a network.

[0158] like Fig.10 As shown in , in some aspects, process 1000 may include communicating a radio access connection establishment message with a network entity via a relay UE on a first signaling radio bearer that is configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE (block 1010). For example, a remote UE (e.g., using Fig.13 The transmission component 1312 or the receiving component 1304 depicted in the figure can communicate a radio access connection establishment message with the network entity via the relay UE on a first signaling radio bearer, and the first signaling radio bearer is configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE, as described above.

[0159] like Fig.10As further shown in FIG. 1 , in some aspects, process 1000 may include receiving a radio bearer configuration for one or more bearers from a network entity via a radio access connection established at least in part based on the radio access connection establishment message (block 1020). For example, a remote UE (e.g., using Fig.13 The receiving component 1304 depicted in can receive a radio bearer configuration for one or more bearers from a network entity via a radio access connection, the radio access connection being established at least in part based on the radio access connection establishment message, as described above.

[0160] like Fig.10 As further shown in FIG. 1 , in some aspects, process 1000 may include receiving, via the radio access connection, an access stratum configuration, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers (block 1030). For example, a remote UE (e.g., using Fig.13 The receiving component 1304 depicted in can receive an access stratum configuration via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers, as described above.

[0161] like Fig.10 As further shown in FIG. 1 , in some aspects, process 1000 may include receiving or transmitting control plane or user plane traffic via the one or more bearers based at least in part on the access stratum configuration (block 1040). Fig.13 The receiving component 1304 or the transmitting component 1312 depicted in can receive or transmit control plane or user plane traffic via the one or more bearers based at least in part on the access stratum configuration, as described above.

[0162] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0163] In a first aspect, the first signaling radio bearer is a signaling radio access bearer 0 (SRBO) associated with radio resource control messaging and handled by a radio access entity of a remote UE.

[0164] In a second aspect, alone or in combination with the first aspect, the radio access entity comprises a control plane radio access packet data convergence protocol entity.

[0165] In a third aspect, alone or in combination with one or more of the first and second aspects, the remote UE is associated with a sidelink signaling entity that handles a sidelink signaling interface of the remote UE, and the established sidelink unicast link is set up by the sidelink signaling entity.

[0166] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the first signaling radio bearer is different from a signaling radio bearer used to set up the established sidelink unicast link.

[0167] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, configuration for the first signaling radio bearer and the sidelink logical channel is preconfigured or defined.

[0168] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the radio access connection establishment message is communicated without encapsulating the radio access connection establishment message in a sidelink signaling container.

[0169] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the radio access connection establishment message comprises a radio resource control message associated with a transition from a radio resource control idle state operation or a radio resource control inactive state operation to a radio resource control connected state operation.

[0170] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, control plane or user plane traffic bypasses a sidelink protocol data convergence protocol entity or a service data adaptation protocol entity of a remote UE.

[0171] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and the one or more bearers include at least one of a signaling radio bearer or a data radio bearer.

[0172] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the radio bearer configuration information element indicates at least one of: a configuration of a user plane radio access entity for a remote UE, a configuration of a control plane radio access entity for a remote UE, or a security configuration for the one or more bearers.

[0173] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the access hierarchy configuration includes an information element indicating at least one of a side link radio link control entity, a media access control entity, or a physical layer entity configuration for the one or more bearers.

[0174] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the access stratum configuration corresponds to a radio access stratum configuration of a relay UE and includes an information element indicating at least one of a radio access discontinuous reception configuration or an inactivity timer for a remote UE for maintaining a connection with a network entity.

[0175] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the one or more bearers are handled by a radio access packet data convergence protocol entity or a radio access service data adaptation protocol entity based at least in part on a radio bearer configuration information element.

[0176] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, a sidelink radio link control entity of the remote UE is configured to handle a protocol data unit format associated with a radio access packet data convergence protocol entity.

[0177] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, process 1000 includes: receiving (e.g., using Fig.13 1304) for configuration information of a sidelink bearer between a remote UE and a relay UE, wherein the configuration information includes a specific radio bearer configuration and a specific access layer configuration for the sidelink bearer; identifying (e.g., using) at least in part based on one or more sidelink radio resource control messages. Fig.13 The establishing component 1306 depicted in FIG. 1 is used to establish a side link bearer with the relay UE for the side link unicast link; and configuring (e.g., using Fig.13 The side link carries the configuration component 1310 depicted in FIG.

[0178] although Fig.10 An example block diagram of process 1000 is shown, but in some aspects, process 1000 may include Fig.10 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1000. Additionally or alternatively, two or more blocks of the process 1000 may be executed in parallel.

[0179] Fig.11 1 is a diagram illustrating an example process 1100, for example, performed by a network entity, according to various aspects of the present disclosure. The example process 1100 is a diagram in which a network entity (eg, BS 110, Figure 3 and 4 NG-RAN Figure 3 and 4 AMF Figure 3 and 4An example of an SMF, etc.) performing operations associated with UE-to-network relay.

[0180] like Fig.11 As shown in , in some aspects, process 1100 may include establishing a radio access connection with a remote UE via a relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated via an established sidelink unicast link between the remote UE and the relay UE (block 1110). For example, a network entity (e.g., using Fig.15 The transmission component 1510 depicted in may establish a radio access connection with a remote UE via a relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated via an established sidelink unicast link between the remote UE and the relay UE, as described above.

[0181] like Fig.11 As further shown in FIG. 1 , in some aspects, process 1100 may include transmitting, via the radio access connection, a radio bearer configuration and an access stratum configuration for one or more bearers, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configuring the remote UE and the relay UE, and wherein the access stratum configuration indicates at least parameters associated with RRC state operations (block 1120). For example, a network entity (e.g., using Fig.15 The transmission component 1510 depicted in the figure can transmit a radio bearer configuration and an access stratum configuration for one or more bearers via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities that configure the remote UE and the relay UE, and wherein the access stratum configuration at least indicates parameters associated with RRC state operations (e.g., discontinuous reception configuration parameters, inactivity timer parameters, etc.), as described above.

[0182] like Fig.11 As further shown in FIG. 1 , in some aspects, process 1100 may include receiving or transmitting control plane or user plane traffic associated with a remote UE via the one or more bearers based at least in part on the access stratum configuration (block 1130). Fig.15 The receiving component 1504 depicted in can receive or transmit control plane or user plane traffic associated with a remote UE via the one or more bearers based at least in part on the access stratum configuration, as described above.

[0183] Process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0184] In a first aspect, the radio access connection setup message comprises a radio resource control message, and the radio access connection setup message is transmitted without encapsulating the radio access connection setup message in a sidelink signaling container.

[0185] In a second aspect, alone or in combination with the first aspect, the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and the one or more bearers include at least one of a signalling radio bearer or a data radio bearer.

[0186] In a third aspect, either alone or in combination with one or more of the first and second aspects, the radio bearer configuration information element indicates at least one of: a configuration of a control plane radio access entity for a remote UE, a configuration of a user plane radio access entity for a remote UE, or a security configuration for the one or more bearers.

[0187] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the radio access connection establishment message is transmitted or received without being encapsulated in a sidelink signaling container, wherein the radio access connection establishment message is transmitted or received via a signaling radio bearer configured with one or more sidelink logical channels for communications associated with establishing a radio access connection, wherein the signaling radio bearer is different from a signaling radio bearer used to configure the established sidelink unicast link and wherein the signaling radio bearer is handled by a control plane radio access packet data convergence protocol entity.

[0188] although Fig.11 An example block diagram of process 1100 is shown, but in some aspects, process 1100 may include Fig.11 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1100. Additionally or alternatively, two or more blocks of the process 1100 may be executed in parallel.

[0189] Fig.12 is a diagram illustrating an example process 1200 performed, for example, by a relay UE in accordance with various aspects of the present disclosure. The example process 1200 is an example in which a relay UE (eg, UE 120) performs operations associated with UE-to-network relaying.

[0190] like Fig.12As shown in , in some aspects, process 1200 may include relaying, via a first signaling radio bearer, a radio access connection establishment message associated with establishing a radio access connection between a remote UE and a network entity via an established sidelink unicast link with the remote UE, the first signaling radio bearer being configured with a sidelink logical channel for communication via the established sidelink unicast link (block 1210). For example, a relay UE (e.g., using Fig.17 The transmission component 1712 or the receiving component 1704 depicted in the figure can relay a radio access connection establishment message associated with establishing a radio access connection between the remote UE and the network entity via an established sidelink unicast link with the remote UE via a first signaling radio bearer, and the first signaling radio bearer is configured with a sidelink logical channel for communication via the established sidelink unicast link, as described above.

[0191] like Fig.12 As further shown in FIG. 1 , in some aspects, process 1200 may include receiving a sidelink access stratum configuration for one or more bearers associated with the radio access connection for a remote UE, wherein the sidelink access stratum configuration is associated with one or more sidelink access stratum entities (block 1220). For example, a relay UE (e.g., using Fig.17 The receiving component 1704 depicted in may receive a sidelink access hierarchy configuration for one or more bearers associated with the radio access connection for a remote UE, wherein the sidelink access hierarchy configuration is associated with one or more sidelink access hierarchy entities, as described above.

[0192] like Fig.12 As further shown in FIG. 1 , in some aspects, process 1200 may include receiving a radio access stratum configuration for one or more bearers associated with the connection for a remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with a network entity (block 1230). For example, a relay UE (e.g., using Fig.17 The receiving component 1704 depicted in can receive a radio access stratum configuration for one or more bearers associated with the connection for a remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with a network entity, as described above.

[0193] like Fig.12 As further shown in FIG. 1 , in some aspects, process 1200 may include relaying control plane or user plane traffic between a remote UE and a network entity via the one or more bearers (block 1240). For example, a relay UE (e.g., using Fig.17The transmission component 1712 depicted in can relay control plane or user plane traffic between the remote UE and the network entity via the one or more bearers, as described above.

[0194] Process 1200 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0195] In a first aspect, the sidelink access stratum configuration is associated with one or more logical channels associated with relay traffic, and the sidelink access stratum configuration is received from a remote UE via a sidelink radio resource control configuration.

[0196] In a second aspect, either alone or in combination with the first aspect, the sidelink access stratum configuration and the radio access stratum configuration are associated with one or more logical channels, and the radio access stratum configuration is received from a network entity via a radio resource control reconfiguration message indicating access stratum configuration information for the one or more logical channels.

[0197] In a third aspect, alone or in combination with one or more of the first and second aspects, the radio access layer configuration indication is for a configuration of at least one of a radio link control entity, a medium access control entity, a physical layer entity, or an adaptation layer entity.

[0198] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the adaptation layer entity is separate from the radio link control entity and the packet data convergence entity and is between the radio link control entity and the packet data convergence entity.

[0199] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the adaptation layer is part of a packet data convergence entity or a radio link control entity.

[0200] In the sixth aspect, alone or in combination with one or more of the first to fifth aspects, the one or more side link access stratum entities are associated with relay traffic based at least in part on the configuration of the one or more side link access stratum entities, and relaying control plane or user plane traffic between the remote UE and the network entity via the one or more bearers further includes: forwarding the control plane or user plane traffic to an adaptation layer entity of the relay UE based at least in part on the association of the control plane or user plane traffic with the one or more side link access stratum entities.

[0201] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the one or more side link access stratum entities are associated with the relay traffic based at least in part on a logical channel identifier associated with the one or more side link access stratum entities, and an adaptation layer entity of the relay UE forwards the control plane or user plane traffic from the one or more side link access stratum entities to the one or more radio access stratum entities based at least in part on the logical channel identifier.

[0202] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, process 1200 includes: receiving (e.g., using Fig.17 ) for a sidelink bearer between a remote UE and a relay UE, wherein the configuration information includes a specific radio bearer configuration and a specific access stratum configuration for the sidelink bearer; identifying (e.g., using) at least in part based on one or more sidelink radio resource control messages. Fig.17 The establishing component 1706 depicted in FIG. 1 is used for establishing a sidelink bearer with a remote UE for a sidelink unicast link; and configuring (e.g., using Fig.17 The side link carries the configuration component 1710 depicted in FIG.

[0203] although Fig.12 An example block diagram of process 1200 is shown, but in some aspects, process 1200 may include Fig.12 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1200. Additionally or alternatively, two or more blocks of the process 1200 may be executed in parallel.

[0204] Fig.13 1300 is a conceptual data flow diagram illustrating data flow between different components in an example device 1302. The device 1302 can be a remote UE. In some aspects, the device 1302 includes a receiving component 1304, an establishing component 1306, a communicating component 1308, a configuring component 1310, and / or a transmitting component 1312.

[0205] The receiving component 1304 can receive control plane or user plane traffic via one or more bearers. In some aspects, the receiving component 1304 can receive configuration information for a sidelink bearer between the device 1302 and the relay UE. In some aspects, the receiving component 1304 can receive an access stratum configuration from a base station 1350. The base station 1350 can be associated with a network entity, such as in conjunction with Fig.12 , 17and 18 are described in more detail. In some aspects, the receiving component 1304 may receive a radio bearer configuration for one or more bearers from the base station 1350. The establishing component 1306 may: establish a connection (e.g., an RRC connection) with the base station via a relay UE; establish one or more bearers based at least in part on the access stratum configuration; establish a unicast link between the device 1302 and the relay UE; use one or more sidelink radio resource control messages to establish one or more sidelink access stratum entities for the one or more bearers based at least in part on the access stratum configuration received from the base station via the connection, etc. The communicating component 1308 may communicate a message (e.g., an NR RRC message, a radio access connection establishment message, etc.) via an SRB that is configured with one or more logical channels for communication associated with establishing the connection before establishing the unicast link. For example, the SRB may be the first SRB configured with a sidelink logical channel for communication via an established sidelink unicast link (e.g., a unicast link). Configuration component 1310 can configure a sidelink bearer based on the configuration information, wherein the sidelink bearer is handled by a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of device 1302. Transmission component 1312 can transmit control plane or user plane traffic or information associated with establishing the one or more bearers, sidelink bearers, unicast links, etc. via the one or more bearers (e.g., based at least in part on the access stratum configuration).

[0206] The apparatus may include executing Figure 7 The aforementioned process 700, Fig.10 The aforementioned process 1000 and the like are additional components of each box of the algorithm. Figure 7 The aforementioned process 700, Fig.10 Each block in the aforementioned process 1000, etc., may be performed by a component, and the device may include one or more of those components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0207] Fig.13 The number and arrangement of components shown in the figure are provided as examples. In practice, there may be Fig.13 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig.13 Two or more components shown in may be implemented in a single component, or Fig.13 The single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Fig.13 A set of components (e.g., one or more components) shown in FIG. 1 may perform operations described as being performed by Fig.13 One or more functions performed by another set of components shown in FIG.

[0208] Fig.14 is a diagram 1400 illustrating an example of a hardware implementation for a device 1405 employing a processing system 1410. The device 1405 may be a remote UE.

[0209] The processing system 1410 may be implemented with a bus architecture generally represented by bus 1415. Bus 1415 may include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system 1410. Bus 1415 links various circuits together, including one or more processors and / or hardware components (represented by processor 1420, components 1304, 1306, 1308, 1310, and / or 1312, and computer readable medium / memory 1425). Bus 1415 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further.

[0210] The processing system 1410 may be coupled to a transceiver 1430. The transceiver 1430 is coupled to one or more antennas 1435. The transceiver 1430 provides a means for communicating with various other devices over a transmission medium. The transceiver 1430 receives signals from the one or more antennas 1435, extracts information from the received signals, and provides the extracted information to the processing system 1410 (specifically, the receiving component 1304). In addition, the transceiver 1430 receives information from the processing system 1410 (specifically, the transmitting component 1312) and generates a signal to be applied to the one or more antennas 1435 based at least in part on the received information.

[0211] The processing system 1410 includes a processor 1420 coupled to a computer-readable medium / memory 1425. The processor 1420 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 1425. The software, when executed by the processor 1420, causes the processing system 1410 to perform various functions described herein for any particular device. The computer-readable medium / memory 1425 may also be used to store data manipulated by the processor 1420 when executing the software. The processing system further includes at least one of components 1304, 1306, 1308, 1310, and / or 1312. Each component may be a software module running in the processor 1420, a software module resident / stored in the computer-readable medium / memory 1425, one or more hardware modules coupled to the processor 1420, or some combination thereof.

[0212] In some aspects, the processing system 1410 may be a component of the UE 120 and may include the memory 282 and / or at least one of: the TX MIMO processor 266 , the RX processor 258 , and / or the controller / processor 280 . In some aspects, the apparatus 1405 for wireless communication includes: a device for establishing a unicast link between a remote UE and a relay UE via a sidelink signaling interface; a device for establishing a connection with a base station via the relay UE, wherein messages associated with establishing the connection are communicated via the unicast link; a device for establishing one or more bearers based at least in part on a radio bearer configuration received from the base station via the connection; a device for establishing one or more sidelink access stratum entities for the one or more bearers with the relay UE using one or more sidelink radio resource control messages based at least in part on an access stratum configuration received from the base station via the connection; a device for receiving or transmitting control plane or user plane traffic via the one or more bearers; a device for receiving configuration information for a sidelink bearer between the remote UE and the relay UE; a device for establishing a sidelink bearer for the unicast link with the relay UE using one or more sidelink radio resource control messages; a device for configuring the sidelink bearer according to the configuration information, wherein the sidelink bearer is handled by a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the remote UE; a device for at least partially based on A device for establishing one or more sidelink access stratum entities for the one or more bearers with a relay UE using one or more sidelink radio resource control messages based on an access stratum configuration received from the base station via the connection; a device for establishing a sidelink bearer for the unicast link with the relay UE using one or more sidelink radio resource control messages; a device for communicating a radio access connection establishment message with a network entity (e.g., base station 110, base station 1350) via the relay UE on a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE; a device for receiving a radio bearer configuration for one or more bearers from a network entity via a radio access connection, the radio access connection being established at least in part based on a radio access connection establishment message; a device for receiving an access stratum configuration via a radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers; a device for receiving or transmitting control plane or user plane traffic via the one or more bearers based at least in part on the access stratum configuration, and the like. The aforementioned means may be the aforementioned components of the device 1302 and / or one or more components in the processing system 1410 of the device 1405 configured to perform the functions recited by the aforementioned means.As described elsewhere herein, the processing system 1410 may include the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280. In one configuration, the aforementioned means may be the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280 configured to perform the functions and / or operations recited herein.

[0213] Fig.14 are provided as examples. Other examples may differ from those in combination with Fig.14 Examples described.

[0214] Fig.15 is a conceptual data flow diagram 1500 illustrating the flow of data between different components in an example device 1502. The device 1502 can be a network entity such as a base station, NG-RAN, core network equipment, AMF, SMF, etc. In some aspects, the base station can facilitate communication for the device 1502. In some aspects, the device 1502 includes a receiving component 1504, an establishing component 1506, a configuring component 1508, and / or a transmitting component 1510.

[0215] The receiving component 1504 may receive control plane or user plane traffic associated with the remote UE via one or more bearers (e.g., between the remote UE and the relay UE). The establishing component 1506 may establish a connection (e.g., a radio access connection) with the remote UE 1550 via the relay UE, wherein a message associated with establishing the connection (e.g., a radio access connection establishment message) is communicated via a unicast link (e.g., an established sidelink unicast link) between the remote UE and the relay UE without encapsulating the message in a sidelink signaling container. The configuring component 1508 may configure a signaling radio bearer for the message before establishing the unicast link. The transmitting component 1510 may: transmit a radio bearer configuration and an access layer configuration for one or more bearers via the connection; transmit control plane or user plane traffic associated with the remote UE via the one or more bearers; transmit a radio bearer configuration information element for the one or more bearers; transmit configuration information for a sidelink bearer between the remote UE and the relay UE; transmit a radio access layer configuration provided via a radio resource control reconfiguration message, etc.

[0216] The apparatus may include executing Figure 8 The aforementioned process 800, Fig.11 The aforementioned process 1100 and the like are additional components to each box of the algorithm. Figure 8 The aforementioned process 800, Fig.11Each block in the aforementioned process 1100, etc., may be performed by a component, and the device may include one or more of those components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0217] Fig.15 The number and arrangement of components shown in the figure are provided as examples. In practice, there may be Fig.15 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig.15 Two or more components shown in may be implemented in a single component, or Fig.15 The single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Fig.15 A set of components (e.g., one or more components) shown in FIG. 1 may perform operations described as being performed by Fig.15 One or more functions performed by another set of components shown in FIG.

[0218] Fig.16 is a diagram 1600 illustrating an example of a hardware implementation for a device 1605 employing a processing system 1610. The device 1605 may be a network entity.

[0219] The processing system 1610 may be implemented with a bus architecture generally represented by bus 1615. Bus 1615 may include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system 1610. Bus 1615 links various circuits together, including one or more processors and / or hardware components (represented by processor 1620, components 1504, 1506, 1508, and / or 1510, and computer readable medium / memory 1625). Bus 1615 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further.

[0220] The processing system 1610 may be coupled to a transceiver 1630. The transceiver 1630 is coupled to one or more antennas 1635. The transceiver 1630 provides a means for communicating with various other devices over a transmission medium. The transceiver 1630 receives signals from the one or more antennas 1635, extracts information from the received signals, and provides the extracted information to the processing system 1610 (specifically, the receiving component 1504). In addition, the transceiver 1630 receives information from the processing system 1610 (specifically, the transmitting component 1510) and generates signals to be applied to the one or more antennas 1635 based at least in part on the received information.

[0221] The processing system 1610 includes a processor 1620 coupled to a computer-readable medium / memory 1625. The processor 1620 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 1625. The software, when executed by the processor 1620, causes the processing system 1610 to perform the various functions described herein for any particular device. The computer-readable medium / memory 1625 may also be used to store data manipulated by the processor 1620 when executing the software. The processing system further includes at least one of the components 1504, 1506, 1508, and / or 1510. Each component may be a software module running in the processor 1620, a software module resident / stored in the computer-readable medium / memory 1625, one or more hardware modules coupled to the processor 1620, or some combination thereof.

[0222] In some aspects, the processing system 1610 may be a component of the base station 110 and may include the memory 242 and / or at least one of the TX MIMO processor 230 , the RX processor 238 , and / or the controller / processor 240 . In some aspects, the apparatus 1605 for wireless communication includes: a device for establishing a connection with a remote UE via a relay UE, wherein a message associated with establishing the connection is communicated via a unicast link between the remote UE and the relay UE; a device for transmitting a radio bearer configuration and an access stratum configuration for one or more bearers via the connection, wherein the access stratum configuration is used for one or more sidelink access stratum entities of the remote UE and the relay UE, and wherein the access stratum configuration indicates parameters associated with a radio resource control (RRC) state operation; a device for receiving or transmitting control plane or user plane traffic associated with the remote UE via the one or more bearers; a device for configuring a signaling radio bearer for the message before establishing a unicast link, wherein the signaling radio bearer is different from a signaling radio bearer used to configure the unicast link; a device for transmitting configuration information for a sidelink bearer between the remote UE and the relay UE, wherein the configuration information for the sidelink bearer is associated with configuring a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the remote UE to handle the sidelink bearer; a device for transmitting a message for the remote UE to transmit to the relay UE; A device for transmitting configuration information of a sidelink bearer between relay UEs, wherein the configuration for the sidelink bearer is associated with configuring a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of a remote UE to handle the sidelink bearer; a device for transmitting a radio access layer configuration provided via a radio resource control reconfiguration message to the relay UE, wherein the radio resource control reconfiguration message includes an adaptation layer entity configuration; a device for establishing a radio access connection with a remote UE via the relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated via an established sidelink unicast link between the remote UE and the relay UE; a device for transmitting a radio bearer configuration and an access layer configuration for one or more bearers via the radio access connection, wherein the access layer configuration is associated with configuring one or more sidelink access layer entities of the remote UE and the relay UE, and wherein the access layer configuration at least indicates parameters associated with an RRC state operation; a device for receiving or transmitting control plane or user plane traffic associated with the remote UE via the one or more bearers based at least in part on the access layer configuration, etc. The aforementioned means may be the aforementioned components of the device 1502 and / or one or more components in the processing system 1610 of the device 1605 configured to perform the functions recited by the aforementioned means.As described elsewhere herein, the processing system 1610 may include the TX MIMO processor 230, the receive processor 238, and / or the controller / processor 240. In one configuration, the aforementioned means may be the TX MIMO processor 230, the receive processor 238, and / or the controller / processor 240 configured to perform the functions and / or operations recited herein.

[0223] Fig.16 are provided as examples. Other examples may differ from those in combination with Fig.16 Examples described.

[0224] Fig.17 1700 is a conceptual data flow diagram illustrating data flow between different components in an example device 1702. The device 1702 can be a relay UE. In some aspects, the device 1702 includes a receiving component 1704, an establishing component 1706, a relaying component 1708, a configuring component 1710, and / or a transmitting component 1712.

[0225] The receiving component 1704 may receive configuration information for a sidelink bearer between a remote UE and the device 1702. In some aspects, the receiving component 1704 may receive various communications (e.g., messages, access stratum configurations, etc.) to be relayed between the base station 1750 and the remote UE by the relay component 1708. The establishing component 1706 may establish a unicast link between the device 1702 and the remote UE via a sidelink signaling interface. In some aspects, the establishing component 1706 may: establish one or more bearers with the remote UE based at least in part on the access stratum configuration relayed to the remote UE via the device 1702; or establish one or more radio access stratum entities of one or more bearers associated with the connection for the remote UE with the base station based at least in part on the radio access stratum configuration received by the device 1702. The relay component 1708 may: relay messages associated with establishing a connection between the remote UE and the base station via the unicast link; relay control plane or user plane traffic, etc. between the remote UE and the base station via the one or more sidelink access stratum entities and the one or more radio access stratum entities or via the one or more bearers. In some aspects, relay component 1708 may relay a radio access connection establishment message associated with establishing a radio access connection between a remote UE and a network entity via an established sidelink unicast link with the remote UE via a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via the established sidelink unicast link. Receiving component 1704 may receive a sidelink access stratum configuration and / or a radio access stratum configuration. Configuration component 1710 may configure the sidelink bearer according to the configuration information received by receiving component 1704. Transmitting component 1712 may transmit various information, such as information to be relayed by relay component 1708 between a remote UE and a base station.

[0226] The apparatus may include executing Fig. 9 The aforementioned process 900, Fig.12 The aforementioned process 1200 and the like are additional components to each box of the algorithm. Fig. 9 The aforementioned process 900, Fig.12 Each block in the aforementioned process 1200, etc., may be performed by a component, and the device may include one or more of those components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0227] Fig.17 The number and arrangement of components shown in the figure are provided as examples. In practice, there may be Fig.17 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig.17 Two or more components shown in may be implemented in a single component, or Fig.17 The single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Fig.17 A set of components (e.g., one or more components) shown in FIG. 1 may perform operations described as being performed by Fig.17 One or more functions performed by another set of components shown in FIG.

[0228] Fig.18 is a diagram 1800 illustrating an example of a hardware implementation for a device 1805 employing a processing system 1810. The device 1805 may be a relay UE.

[0229] The processing system 1810 may be implemented with a bus architecture generally represented by bus 1815. Depending on the specific application and overall design constraints of the processing system 1810, the bus 1815 may include any number of interconnecting buses and bridges. The bus 1815 links together various circuits including one or more processors and / or hardware components (represented by processor 1820, components 1704, 1706, 1708, 1710, and / or 1712, and computer readable media / memory 1825). The bus 1815 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further.

[0230] The processing system 1810 may be coupled to a transceiver 1830. The transceiver 1830 is coupled to one or more antennas 1835. The transceiver 1830 provides a means for communicating with various other devices over a transmission medium. The transceiver 1830 receives signals from the one or more antennas 1835, extracts information from the received signals, and provides the extracted information to the processing system 1810 (specifically, the receiving component 1704). In addition, the transceiver 1830 receives information from the processing system 1810 (specifically, the transmitting component 1712) and generates a signal to be applied to the one or more antennas 1835 based at least in part on the received information.

[0231] The processing system 1810 includes a processor 1820 coupled to a computer-readable medium / memory 1825. The processor 1820 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 1825. The software, when executed by the processor 1820, causes the processing system 1810 to perform various functions described herein for any particular device. The computer-readable medium / memory 1825 may also be used to store data manipulated by the processor 1820 when executing the software. The processing system further includes at least one of components 1704, 1706, 1708, 1710, and / or 1712. Each component may be a software module running in the processor 1820, a software module resident / stored in the computer-readable medium / memory 1825, one or more hardware modules coupled to the processor 1820, or some combination thereof.

[0232] In some aspects, the processing system 1810 may be a component of the UE 120 and may include the memory 282 and / or at least one of the TX MIMO processor 266 , the RX processor 258 , and / or the controller / processor 280 . In some aspects, the apparatus 1805 for wireless communication includes: means for establishing a unicast link between a relay UE and a remote UE via a sidelink signaling interface; means for relaying messages associated with establishing a connection between the remote UE and a base station via the unicast link; means for establishing with the remote UE one or more sidelink access stratum entities for one or more bearers associated with the connection for the remote UE based at least in part on a sidelink access stratum configuration; means for relaying control plane or user plane traffic between the remote UE and the base station via the one or more sidelink access stratum entities; means for receiving configuration information for a sidelink bearer between the remote UE and the relay UE; means for configuring the sidelink bearer according to the configuration information, wherein the sidelink bearer is handled by a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the relay UE; means for receiving configuration information for a sidelink bearer between the remote UE and the relay UE; means for configuring the sidelink bearer according to the configuration information, wherein the sidelink bearer is handled by a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the relay UE; means for using one or more sidelink radio resources A device for establishing a sidelink bearer for the unicast link with a remote UE using a source control message; a device for establishing one or more radio access stratum entities for one or more bearers associated with the connection for the remote UE with a base station based at least in part on a radio access stratum configuration received by a relay UE; a device for relaying a radio access connection establishment message associated with establishing a radio access connection between the remote UE and a network entity via an established sidelink unicast link via a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via the established sidelink unicast link with the remote UE; a device for receiving a sidelink access stratum configuration for one or more bearers associated with the radio access connection for the remote UE, wherein the sidelink access stratum configuration is associated with one or more sidelink access stratum entities; a device for receiving a radio access stratum configuration for one or more bearers associated with the connection for the remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with a network entity; a device for relaying control plane or user plane traffic between the remote UE and the network entity via the one or more bearers, etc. The aforementioned means may be the aforementioned components of the device 1702 and / or one or more components in the processing system 1810 of the device 1805 configured to perform the functions recited by the aforementioned means.As described elsewhere herein, the processing system 1810 may include the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280. In one configuration, the aforementioned means may be the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280 configured to perform the functions and / or operations recited herein.

[0233] Fig.18 are provided as examples. Other examples may differ from those in combination with Fig.18 Examples described.

[0234] The following provides an overview of some aspects of the disclosure:

[0235] Aspect 1: A wireless communication method performed by a remote UE, comprising: communicating a radio access connection establishment message with a network entity via a relay UE on a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE; receiving a radio bearer configuration for one or more bearers from the network entity via a radio access connection, the radio access connection being established at least in part based on the radio access connection establishment message; receiving an access stratum configuration via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers; and receiving or transmitting control plane or user plane traffic via the one or more bearers based at least in part on the access stratum configuration.

[0236] Aspect 2: The method of aspect 1, wherein the first signaling radio bearer is a signaling radio access bearer 0 (SRB0) associated with radio resource control messaging and handled by a radio access entity of the remote UE.

[0237] Aspect 3: The method of aspect 2, wherein the radio access entity comprises a control plane radio access packet data convergence protocol entity.

[0238] Aspect 4: The method of aspect 2, wherein the remote UE is associated with a sidelink signaling entity that handles a sidelink signaling interface of the remote UE, and wherein the established sidelink unicast link is set up by the sidelink signaling entity.

[0239] Aspect 5: The method of any one of aspects 1-4, wherein the first signaling radio bearer is different from a signaling radio bearer used to set up the established sidelink unicast link.

[0240] Aspect 6: The method of any one of aspects 1-5, wherein the configuration for the first signaling radio bearer and the sidelink logical channel is preconfigured or defined.

[0241] Aspect 7: The method of any one of aspects 1-6, wherein the radio access connection establishment message is communicated without encapsulating the radio access connection establishment message in a sidelink signaling container.

[0242] Aspect 8: The method of any one of aspects 1-7, wherein the radio access connection establishment message comprises a radio resource control message associated with transitioning from a radio resource control idle state operation or a radio resource control inactive state operation to a radio resource control connected state operation.

[0243] Aspect 9: The method of any one of aspects 1-8, wherein the control plane or user plane traffic bypasses a sidelink protocol data convergence protocol entity or a service data adaptation protocol entity of the remote UE.

[0244] Aspect 10: The method of any one of aspects 1-9, wherein the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and wherein the one or more bearers include at least one of a signaling radio bearer or a data radio bearer.

[0245] Aspect 11: A method as in Aspect 10, wherein the radio bearer configuration information element indicates at least one of: a configuration of a user plane radio access entity for the remote UE, a configuration of a control plane radio access entity for the remote UE, or a security configuration for the one or more bearers.

[0246] Aspect 12: The method of aspect 10, wherein the access hierarchy configuration comprises an information element indicating at least one of a sidelink radio link control entity, a medium access control entity, or a physical layer entity configuration for the one or more bearers.

[0247] Aspect 13: A method as in Aspect 10, wherein the access stratum configuration corresponds to the radio access stratum configuration of the relay UE and includes an information element indicating at least one of a radio access discontinuous reception configuration or an inactivity timer for the remote UE for maintaining a connection with the network entity.

[0248] Aspect 14: The method of aspect 10, wherein the one or more bearers are handled by a radio access packet data convergence protocol entity or a radio access service data adaptation protocol entity based at least in part on the radio bearer configuration information element.

[0249] Aspect 15: The method of aspect 14, wherein the sidelink radio link control entity of the remote UE is configured to handle a protocol data unit format associated with the radio access packet data convergence protocol entity.

[0250] Aspect 16: The method as in any one of Aspects 1-15, further comprising: receiving configuration information for a sidelink bearer between the remote UE and the relay UE, wherein the configuration information includes a specific radio bearer configuration and a specific access layer configuration for the sidelink bearer; identifying the sidelink bearer with the relay UE for the established sidelink unicast link based at least in part on one or more sidelink radio resource control messages; and configuring the sidelink bearer according to the configuration information.

[0251] Aspect 17: A wireless communication method performed by a network entity, comprising: establishing a radio access connection with a remote UE via a relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated via an established sidelink unicast link between the remote UE and the relay UE; transmitting a radio bearer configuration and an access stratum configuration for one or more bearers via the radio access connection, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configuring the remote UE and the relay UE, and wherein the access stratum configuration at least indicates parameters associated with a radio resource control (RRC) state operation; and receiving or transmitting control plane or user plane traffic associated with the remote UE via the one or more bearers based at least in part on the access stratum configuration.

[0252] Aspect 18: The method of aspect 17, wherein the radio access connection establishment message comprises a radio resource control message, and wherein the radio access connection establishment message is transmitted without encapsulating the radio access connection establishment message in a sidelink signaling container.

[0253] Aspect 19: The method of any one of aspects 17-18, wherein the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and wherein the one or more bearers include at least one of a signaling radio bearer or a data radio bearer.

[0254] Aspect 20: A method as in Aspect 19, wherein the radio bearer configuration information element indicates at least one of: a configuration of a control plane radio access entity for the remote UE, a configuration of a user plane radio access entity for the remote UE, or a security configuration for the one or more bearers.

[0255] Aspect 21: A method as in any of Aspects 17-20, wherein the radio access connection establishment message is transmitted or received without being encapsulated in a sidelink signaling container, wherein the radio access connection establishment message is transmitted or received via a signaling radio bearer configured with one or more sidelink logical channels for communications associated with establishing the radio access connection, wherein the signaling radio bearer is different from the signaling radio bearer used to configure the established sidelink unicast link, and wherein the signaling radio bearer is handled by a control plane radio access packet data convergence protocol entity.

[0256] Aspect 22: A wireless communication method performed by a relay UE, comprising: relaying a radio access connection establishment message associated with establishing a radio access connection between a remote UE and a network entity via an established sidelink unicast link with the remote UE via a first signaling radio bearer, the first signaling radio bearer being configured with a sidelink logical channel for communication via the established sidelink unicast link; receiving a sidelink access stratum configuration of one or more bearers associated with the radio access connection for the remote UE, wherein the sidelink access stratum configuration is associated with one or more sidelink access stratum entities; receiving a radio access stratum configuration of the one or more bearers associated with the connection for the remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with the network entity; and relaying control plane or user plane traffic between the remote UE and the network entity via the one or more bearers.

[0257] Aspect 23: The method of Aspect 22, wherein the sidelink access hierarchy configuration is associated with one or more logical channels associated with relay traffic, and wherein the sidelink access hierarchy configuration is received from the remote UE via a sidelink radio resource control configuration.

[0258] Aspect 24: A method as in any of Aspects 22-23, wherein the sidelink access stratum configuration and the radio access stratum configuration are associated with one or more logical channels, and wherein the radio access stratum configuration is received from the network entity via a radio resource control reconfiguration message indicating access stratum configuration information for the one or more logical channels.

[0259] Aspect 25: The method of Aspect 24, wherein the radio access layer configuration indication is used for configuration of at least one of a radio link control entity, a medium access control entity, a physical layer entity, or an adaptation layer entity.

[0260] Aspect 26: The method of aspect 25, wherein the adaptation layer entity is separate from the radio link control entity and the packet data convergence entity, and is between the radio link control entity and the packet data convergence entity.

[0261] Aspect 27: The method of aspect 25, wherein the adaptation layer is part of a packet data convergence entity or the radio link control entity.

[0262] Aspect 28: A method as in any of Aspects 22-27, wherein the one or more sidelink access stratum entities are associated with relay traffic based at least in part on a configuration of the one or more sidelink access stratum entities, and wherein relaying control plane or user plane traffic between the remote UE and the network entity via the one or more bearers further includes: forwarding the control plane or user plane traffic to an adaptation layer entity of the relay UE based at least in part on the association of the control plane or user plane traffic with the one or more sidelink access stratum entities.

[0263] Aspect 29: A method as in any of Aspects 22-28, wherein the one or more sidelink access stratum entities are associated with the relay traffic based at least in part on a logical channel identifier associated with the one or more sidelink access stratum entities, and wherein the adaptation layer entity of the relay UE forwards the control plane or user plane traffic from the one or more sidelink access stratum entities to the one or more radio access stratum entities based at least in part on the logical channel identifier.

[0264] Aspect 30: The method as in any one of Aspects 22-29, further comprising: receiving configuration information for a sidelink bearer between the remote UE and the relay UE, wherein the configuration information includes a specific radio bearer configuration and a specific access layer configuration for the sidelink bearer; identifying the sidelink bearer with the remote UE for the established sidelink unicast link based at least in part on one or more sidelink radio resource control messages; and configuring the sidelink bearer according to the configuration information.

[0265] Aspect 31: A wireless communication method performed by a remote UE, comprising: establishing a unicast link between the remote UE and a relay UE via a sidelink signaling interface; establishing a connection with a base station via the relay UE, wherein messages associated with establishing the connection are communicated via the unicast link; establishing one or more bearers based at least in part on a radio bearer configuration received from the base station via the connection; establishing one or more sidelink access stratum entities for the one or more bearers with the relay UE using one or more sidelink radio resource control messages based at least in part on an access stratum configuration received from the base station via the connection; and receiving or transmitting control plane or user plane traffic via the one or more bearers.

[0266] Aspect 32: The method of Aspect 31 further comprises: communicating the message via a signaling radio bearer configured with one or more sidelink logical channels for communications associated with establishing the connection, wherein the signaling radio bearer is different from the signaling radio bearer used to establish the unicast link.

[0267] Aspect 33: The method of Aspect 32, wherein the signaling radio bearer is handled by a radio access entity of the remote UE.

[0268] Aspect 34: The method of Aspect 33, wherein the radio access entity comprises a control plane radio access packet data convergence protocol entity.

[0269] Aspect 35: The method of aspect 33, wherein the remote UE is associated with a sidelink signaling entity that handles the sidelink signaling interface, and wherein the unicast link is established by the sidelink signaling entity.

[0270] Aspect 36: The method of Aspect 32, wherein the message is communicated on a logical channel of the one or more sidelink logical channels, and wherein the message is communicated without encapsulating the message in a sidelink signaling container.

[0271] Aspect 37: The method of any of Aspects 31-36, wherein the message comprises a radio resource control message associated with transitioning from a radio resource control idle state or a radio resource control inactive state operation to a radio resource control connected state operation.

[0272] Aspect 38: The method of any one of aspects 31-37, wherein the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and wherein the one or more bearers include at least one of a signaling radio bearer or a data radio bearer.

[0273] Aspect 39: A method as in Aspect 38, wherein the radio bearer configuration information element indicates at least one of: a configuration of a user plane radio access entity for the remote UE, a configuration of a control plane radio access entity for the remote UE, or a security configuration for the one or more bearers.

[0274] Aspect 40: The method of aspect 38, wherein the access hierarchy configuration comprises information elements indicating a sidelink radio link control entity, a medium access control entity, and a physical layer entity configuration for the one or more bearers.

[0275] Aspect 41: The method of aspect 38, wherein the one or more bearers are handled by a radio access packet data convergence protocol entity or a radio access service data adaptation protocol entity based at least in part on the radio bearer configuration information element.

[0276] Aspect 42: The method of aspect 41, wherein the sidelink radio link control entity of the remote UE is configured to handle a protocol data unit format associated with the radio access packet data convergence protocol entity.

[0277] Aspect 43: The method as in any one of Aspects 31-42 further includes: receiving configuration information for a sidelink bearer between the remote UE and the relay UE; establishing a sidelink bearer for the unicast link with the relay UE using one or more sidelink radio resource control messages; and configuring the sidelink bearer according to the configuration information, wherein the sidelink bearer is handled by a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the remote UE.

[0278] Aspect 44: The method of any one of Aspects 31-43, wherein the access hierarchy configuration is received together with the message.

[0279] Aspect 45: The method of any one of Aspects 31-44, wherein the message is transmitted or received via the sidelink signaling interface.

[0280] Aspect 46: The method of Aspect 45, wherein the message is encapsulated in a sidelink signaling container.

[0281] Aspect 47: A method as in any of Aspects 31-46, wherein establishing the connection with the base station is based at least in part on a parameter indicating a discontinuous reception configuration or an inactivity timer for the remote UE, and wherein the method further comprises maintaining the connection with the base station based at least in part on the parameter.

[0282] Aspect 48: The method of any one of aspects 31-47, wherein the control plane or user plane traffic bypasses a sidelink protocol data convergence protocol entity or a service data adaptation protocol entity of the remote UE.

[0283] Aspect 49: A wireless communication method performed by a base station, comprising: establishing a connection with a remote UE via a relay UE, wherein a message associated with establishing the connection is communicated via a unicast link between the remote UE and the relay UE; transmitting a radio bearer configuration and an access stratum configuration for one or more bearers via the connection, wherein the access stratum configuration is used for one or more sidelink access stratum entities of the remote UE and the relay UE, and wherein the access stratum configuration indicates parameters associated with a radio resource control (RRC) state operation; and receiving or transmitting control plane or user plane traffic associated with the remote UE via the one or more bearers.

[0284] Aspect 50: The method of aspect 49 further comprises: configuring a signaling radio bearer for the message before establishing the unicast link, wherein the signaling radio bearer is different from a signaling radio bearer used to configure the unicast link.

[0285] Aspect 51: The method of any of Aspects 49-50, wherein the message comprises a radio resource control message, and wherein the message is transmitted without encapsulating the message in a sidelink signaling container.

[0286] Aspect 52: The method of Aspect 51, wherein the access stratum configuration is transmitted together with the radio resource control message.

[0287] Aspect 53: A method as in any one of Aspects 49-52, wherein the access hierarchy configuration comprises information elements indicating a sidelink radio link control entity, a sidelink medium access control entity, and a sidelink physical layer entity configuration for the one or more bearers.

[0288] Aspect 54: The method as in any one of Aspects 49-53 further includes: transmitting configuration information for a sidelink bearer between the remote UE and the relay UE, wherein the configuration information for the sidelink bearer is associated with configuring a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the remote UE to handle the sidelink bearer.

[0289] Aspect 55: The method of any one of aspects 49-54, wherein the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and wherein the one or more bearers include at least one of a signaling radio bearer or a data radio bearer.

[0290] Aspect 56: A method as in Aspect 55, wherein the radio bearer configuration information element indicates at least one of: a configuration of a control plane radio access entity for the remote UE, a configuration of a user plane radio access entity for the remote UE, or a security configuration for the one or more bearers.

[0291] Aspect 57: The method of aspect 55, wherein the one or more bearers are handled by a Radio Access Packet Data Convergence Protocol entity or a Radio Access Service Data Adaptation Protocol entity.

[0292] Aspect 58: The method of aspect 57, wherein the sidelink radio link control entity of the remote UE is configured to handle a protocol data unit format associated with the radio access packet data convergence protocol entity.

[0293] Aspect 59: The method of any one of Aspects 49-58, further comprising: transmitting the radio access stratum configuration provided via the radio resource control reconfiguration message to the relay UE.

[0294] Aspect 60: The method of aspect 59, wherein the radio access layer configuration indication is for configuration of at least one of a radio link control entity, a medium access control entity, a physical layer entity, or an adaptation layer entity.

[0295] Aspect 61: The method of aspect 60, wherein the adaptation layer entity is separate from the radio link control entity and the packet data convergence entity, and is between the radio link control entity and the packet data convergence entity.

[0296] Aspect 62: The method of aspect 60, wherein the adaptation layer is part of a packet data convergence entity or the radio link control entity.

[0297] Aspect 63: The method of Aspect 59 further includes: transmitting configuration information for a sidelink bearer between the remote UE and the relay UE, wherein the configuration for the sidelink bearer is associated with configuring a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the remote UE to handle the sidelink bearer.

[0298] Aspect 64: A method as in Aspect 59, wherein the message is encapsulated in a sidelink signaling container.

[0299] Aspect 65: The method of Aspect 59, wherein the parameter associated with the RRC state operation indicates a discontinuous reception configuration or an inactivity timer for the remote UE.

[0300] Aspect 66: A method as in Aspect 59, wherein the message is transmitted or received without being encapsulated in a sidelink signaling container, wherein the message is transmitted or received via a signaling radio bearer configured with one or more sidelink logical channels for communications associated with establishing the connection, wherein the signaling radio bearer is different from a signaling radio bearer used to configure the unicast link, and wherein the signaling radio bearer is handled by a control plane radio access packet data convergence protocol entity.

[0301] Aspect 67: A wireless communication method performed by a relay UE, comprising: establishing a unicast link between the relay UE and a remote UE via a sidelink signaling interface; relaying messages associated with establishing a connection between the remote UE and a base station via the unicast link; establishing with the remote UE one or more sidelink access stratum entities for one or more bearers associated with the connection for the remote UE based at least in part on a sidelink access stratum configuration; establishing with the base station one or more radio access stratum entities for one or more bearers associated with the connection for the remote UE based at least in part on a radio access stratum configuration received by the relay UE; and relaying control plane or user plane traffic between the remote UE and the base station via the one or more sidelink access stratum entities and the one or more radio access stratum entities.

[0302] Aspect 68: The method of aspect 67, wherein the sidelink access hierarchy configuration is associated with one or more logical channels associated with relay traffic, and wherein the sidelink access hierarchy configuration is received from the remote UE via a sidelink radio resource control configuration.

[0303] Aspect 69: A method as in any of Aspects 67-68, wherein the sidelink access stratum configuration and the radio access stratum configuration are associated with one or more logical channels, and wherein the radio access stratum configuration is received from the base station via a radio resource control reconfiguration message indicating access stratum configuration information for the one or more logical channels.

[0304] Aspect 70: The method of aspect 69, wherein the radio access layer configuration indication is for configuration of at least one of a radio link control entity, a medium access control entity, a physical layer entity, or an adaptation layer entity.

[0305] Aspect 71: The method of aspect 70, wherein the adaptation layer entity is separate from the radio link control entity and the packet data convergence entity, and is between the radio link control entity and the packet data convergence entity.

[0306] Aspect 72: The method of aspect 70, wherein the adaptation layer is part of a packet data convergence entity or the radio link control entity.

[0307] Aspect 73: A method as in any of Aspects 67-72, wherein the one or more sidelink access stratum entities are associated with relay traffic based at least in part on a configuration of the one or more sidelink access stratum entities, and wherein relaying control plane or user plane traffic between the remote UE and the base station via the one or more sidelink access stratum entities and the one or more radio access stratum entities further includes: forwarding the control plane or user plane traffic to an adaptation layer entity of the relay UE based at least in part on the association of the control plane or user plane traffic with the one or more sidelink access stratum entities.

[0308] Aspect 74: The method of Aspect 73, wherein the one or more sidelink access stratum entities are associated with the relay traffic based at least in part on a logical channel identifier associated with the one or more sidelink access stratum entities.

[0309] Aspect 75: A method as in Aspect 74, wherein the adaptation layer entity of the relay UE forwards the control plane or user plane traffic from the one or more sidelink access stratum entities to the one or more radio access stratum entities based at least in part on the logical channel identifier.

[0310] Aspect 76: The method of any one of aspects 67-75, wherein the relay UE is associated with a sidelink signaling entity handling the sidelink signaling interface, and wherein the unicast link is configured by the sidelink signaling entity.

[0311] Aspect 77: The method of any one of Aspects 67-76, wherein the message comprises a radio resource control message.

[0312] Aspect 78: The method as in any one of Aspects 67-77, further comprising: receiving configuration information for a sidelink bearer between the remote UE and the relay UE; establishing a sidelink bearer for the unicast link with the remote UE using one or more sidelink radio resource control messages; and configuring the sidelink bearer according to the configuration information, wherein the sidelink bearer is handled by a sidelink packet data convergence protocol entity or a sidelink service data adaptation protocol entity of the relay UE.

[0313] Aspect 79: The method of any one of aspects 67-78, wherein the one or more bearers are associated with a user plane or control plane radio access entity of the remote UE.

[0314] Aspect 80: A method as in any one of Aspects 67-79, wherein the message is encapsulated in a sidelink signaling container.

[0315] Aspect 81: The method of any one of Aspects 67-80, wherein the control plane or user plane traffic bypasses a sidelink protocol data convergence protocol entity or a service data adaptation protocol entity of the relay UE.

[0316] Aspect 82: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as in one or more of Aspects 1-81.

[0317] Aspect 83: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more aspects of aspects 1-81.

[0318] Aspect 84: An apparatus for wireless communication, comprising at least one means for performing the method of one or more aspects of aspects 1-81.

[0319] Aspect 85: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-81.

[0320] Aspect 86: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more aspects of aspects 1-81.

[0321] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired by practice of the various aspects.

[0322] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented with hardware, firmware, and / or a combination of hardware and software.

[0323] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0324] It will be apparent that the systems and / or methods described herein can be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit the various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes-it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0325] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. The phrase quoting "at least one of" a column of items refers to any combination of these items, including a single member. As an example, "at least one of a, b or c" is intended to cover: a, b, c, ab, ac, bc, and abc, and any combination with multiple identical elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other sorting of a, b and c).

[0326] Elements, actions or instructions used herein should not be interpreted as critical or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, non-related items, combinations of related and non-related items, etc.), and can be used interchangeably with "one or more". In the case of intending to have only one item, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including", etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated.

Claims

1. A wireless communication method performed by a remote user equipment UE, comprising: communicating a radio access connection establishment message with a network entity via a relay UE without encapsulation in a sidelink signaling container, wherein the radio access connection establishment message is communicated on a first signaling radio bearer configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE; receiving a radio bearer configuration for one or more bearers from the network entity via a radio access connection, the radio access connection being established at least in part based on the radio access connection setup message; receiving, via the radio access connection, an access stratum configuration, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers; as well as Control plane or user plane traffic is received or transmitted via the one or more bearers based at least in part on the access stratum configuration.

2. The method of claim 1 , wherein the first signaling radio bearer is a signaling radio access bearer (OSRB0) associated with radio resource control messaging and handled by a radio access entity of the remote UE.

3. The method of claim 2, wherein the radio access entity comprises a control plane radio access packet data convergence protocol entity.

4. The method of claim 2, wherein the remote UE is associated with a sidelink signaling entity that handles a sidelink signaling interface of the remote UE, and wherein the established sidelink unicast link is set up by the sidelink signaling entity.

5. The method of claim 1, wherein the first signaling radio bearer is different from a signaling radio bearer used to set up the established sidelink unicast link.

6. The method of claim 1, wherein configurations for the first signaling radio bearer and the sidelink logical channel are preconfigured or defined.

7. The method of claim 1, wherein the radio access connection establishment message comprises a radio resource control message associated with a transition from a radio resource control idle state operation or a radio resource control inactive state operation to a radio resource control connected state operation.

8. The method of claim 1, wherein the control plane or user plane traffic bypasses a sidelink protocol data convergence protocol entity or a service data adaptation protocol entity of the remote UE.

9. The method of claim 1, wherein the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and wherein the one or more bearers comprise at least one of a signaling radio bearer or a data radio bearer.

10. The method of claim 9, wherein the radio bearer configuration information element indicates at least one of: configuration of a user plane radio access entity for said remote UE, configuration of a control plane radio access entity for the remote UE, or A security configuration for the one or more bearers.

11. The method of claim 9, wherein the access hierarchy configuration comprises an information element indicating at least one of a sidelink radio link control entity, a medium access control entity, or a physical layer entity configuration for the one or more bearers.

12. The method of claim 9, wherein the access stratum configuration corresponds to a radio access stratum configuration of the relay UE and comprises an information element indicating at least one of a radio access discontinuous reception configuration or an inactivity timer for the remote UE for maintaining the radio access connection with the network entity.

13. The method of claim 9, wherein the one or more bearers are handled by a Radio Access Packet Data Convergence Protocol entity or a Radio Access Service Data Adaptation Protocol entity based at least in part on the Radio Bearer Configuration Information Element.

14. The method of claim 13, wherein the sidelink radio link control entity of the remote UE is configured to handle a protocol data unit format associated with the radio access packet data convergence protocol entity.

15. The method of claim 1, further comprising: receiving configuration information for a sidelink bearer between the remote UE and the relay UE, wherein the configuration information includes a specific radio bearer configuration and a specific access stratum configuration for the sidelink bearer; identifying a sidelink bearer with the relay UE for the established sidelink unicast link based at least in part on one or more sidelink radio resource control messages; and The sidelink bearer is configured according to the configuration information.

16. A wireless communication method performed by a network entity, comprising: establishing a radio access connection with a remote user equipment UE via a relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated without being encapsulated in a sidelink signaling container, wherein the radio access connection establishment message is communicated via an established sidelink unicast link between the remote UE and the relay UE; transmitting, via the radio access connection, a radio bearer configuration and an access stratum configuration for one or more bearers, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configuring the remote UE and the relay UE, and wherein the access stratum configuration indicates at least parameters associated with a radio resource control (RRC) state operation; as well as Control plane or user plane traffic associated with the remote UE is received or transmitted via the one or more bearers based at least in part on the access stratum configuration.

17. The method of claim 16, wherein the radio access connection establishment message comprises a radio resource control message.

18. The method of claim 16, wherein the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and wherein the one or more bearers comprise at least one of a signaling radio bearer or a data radio bearer.

19. The method of claim 18, wherein the radio bearer configuration information element indicates at least one of: configuration of a control plane radio access entity for said remote UE, configuration of a user plane radio access entity for the remote UE, or A security configuration for the one or more bearers.

20. The method of claim 16, wherein the radio access connection establishment message is transmitted or received via a signaling radio bearer configured with one or more sidelink logical channels for communications associated with establishing the radio access connection, wherein the signaling radio bearer is different from another signaling radio bearer used to configure the established sidelink unicast link, and wherein the signaling radio bearer is handled by a control plane radio access packet data convergence protocol entity.

21. A wireless communication method performed by a relay user equipment UE, comprising: relaying a radio access connection setup message via a first signaling radio bearer configured with a sidelink logical channel for communication via an established sidelink unicast link with a remote UE, wherein the radio access connection setup message is associated with establishing a radio access connection between the remote UE and a network entity via the established sidelink unicast link, wherein the radio access connection setup message is communicated without being encapsulated in a sidelink signaling container; receiving a sidelink access stratum configuration for one or more bearers associated with the radio access connection for the remote UE, wherein the sidelink access stratum configuration is associated with one or more sidelink access stratum entities; receiving a radio access stratum configuration for the one or more bearers associated with the radio access connection for the remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with the network entity; as well as Control plane or user plane traffic is relayed between the remote UE and the network entity via the one or more bearers.

22. The method of claim 21, wherein the sidelink access stratum configuration is associated with one or more logical channels associated with relay traffic, and wherein the sidelink access stratum configuration is received from the remote UE via a sidelink radio resource control configuration.

23. The method of claim 21, wherein the sidelink access stratum configuration and the radio access stratum configuration are associated with one or more logical channels, and wherein the radio access stratum configuration is received from the network entity via a radio resource control reconfiguration message indicating access stratum configuration information for the one or more logical channels.

24. The method of claim 23, wherein the radio access layer configuration indication is for configuration of an adaptation layer entity.

25. The method of claim 24, wherein the adaptation layer entity is separate from a radio link control entity and a packet data convergence entity and is between the radio link control entity and the packet data convergence entity.

26. The method of claim 24, wherein the adaptation layer is part of a packet data convergence entity or a radio link control entity.

27. The method of claim 21, wherein the one or more sidelink access stratum entities are associated with relaying traffic based at least in part on a configuration of the one or more sidelink access stratum entities, and wherein relaying control plane or user plane traffic between the remote UE and the network entity via the one or more bearers further comprises: The control plane or user plane traffic is forwarded to an adaptation layer entity of the relay UE based at least in part on the control plane or user plane traffic being associated with the one or more sidelink access stratum entities.

28. A method as claimed in claim 21, wherein the one or more sidelink access stratum entities are associated with the relay traffic based at least in part on a logical channel identifier associated with the one or more sidelink access stratum entities, and wherein the adaptation layer entity of the relay UE forwards the control plane or user plane traffic from the one or more sidelink access stratum entities to the one or more radio access stratum entities based at least in part on the logical channel identifier.

29. The method of claim 21, further comprising: receiving configuration information for a sidelink bearer between the remote UE and the relay UE, wherein the configuration information includes a specific radio bearer configuration and a specific access stratum configuration for the sidelink bearer; identifying a sidelink bearer with the remote UE for the established sidelink unicast link based at least in part on one or more sidelink radio resource control messages; and The sidelink bearer is configured according to the configuration information.

30. The method of claim 21, wherein the radio access layer configuration indicates a configuration for at least one of a radio link control entity, a medium access control entity, or a physical layer entity.

31. A remote user equipment UE for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the one or more processors configured to: communicating a radio access connection establishment message with a network entity via a relay UE without encapsulation in a sidelink signaling container, wherein the radio access connection establishment message is communicated on a first signaling radio bearer configured with a sidelink logical channel for communication via an established sidelink unicast link with the relay UE; receiving a radio bearer configuration for one or more bearers from the network entity via a radio access connection, the radio access connection being established at least in part based on the radio access connection setup message; receiving, via the radio access connection, an access stratum configuration, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configured for the one or more bearers; as well as Control plane or user plane traffic is received or transmitted via the one or more bearers based at least in part on the access stratum configuration.

32. The remote UE of claim 31 , wherein the first signaling radio bearer is a signaling radio access bearer (OSRB0) associated with radio resource control messaging and handled by a radio access entity of the remote UE.

33. The remote UE of claim 31, wherein the remote UE is associated with a sidelink signaling entity that handles a sidelink signaling interface of the remote UE.

34. The remote UE of claim 31, wherein the access stratum configuration comprises an information element indicating at least one of a sidelink radio link control entity, a medium access control entity, or a physical layer entity configuration for the one or more bearers.

35. The remote UE of claim 31, wherein the access stratum configuration is associated with a radio bearer configuration information element for the one or more bearers, and wherein the one or more bearers comprise at least one of a signaling radio bearer or a data radio bearer.

36. A network entity for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the one or more processors configured to: establishing a radio access connection with a remote user equipment UE via a relay UE, wherein a radio access connection establishment message associated with establishing the radio access connection is communicated without being encapsulated in a sidelink signaling container, wherein the radio access connection establishment message is communicated via an established sidelink unicast link between the remote UE and the relay UE; transmitting, via the radio access connection, a radio bearer configuration and an access stratum configuration for one or more bearers, wherein the access stratum configuration is associated with one or more sidelink access stratum entities configuring the remote UE and the relay UE, and wherein the access stratum configuration indicates at least parameters associated with a radio resource control (RRC) state operation; as well as Control plane or user plane traffic associated with the remote UE is received or transmitted via the one or more bearers based at least in part on the access stratum configuration.

37. The network entity of claim 36, wherein the radio access connection establishment message comprises a radio resource control message.

38. The network entity of claim 37, wherein the radio access connection establishment message is transmitted or received via a signaling radio bearer configured with one or more sidelink logical channels for communications associated with establishing the radio access connection.

39. The network entity of claim 38, wherein the signaling radio bearer is different from another signaling radio bearer used for configuring the established sidelink unicast link.

40. The network entity of claim 38, wherein the signaling radio bearer is handled by a control plane radio access packet data convergence protocol entity.

41. A relay user equipment UE for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the one or more processors configured to: relaying a radio access connection setup message via a first signaling radio bearer configured with a sidelink logical channel for communication via an established sidelink unicast link with a remote UE, wherein the radio access connection setup message is associated with establishing a radio access connection between the remote UE and a network entity via the established sidelink unicast link, wherein the radio access connection setup message is communicated without being encapsulated in a sidelink signaling container; receiving a sidelink access stratum configuration for one or more bearers associated with the radio access connection for the remote UE, wherein the sidelink access stratum configuration is associated with one or more sidelink access stratum entities; receiving a radio access stratum configuration for the one or more bearers associated with the radio access connection for the remote UE, wherein the radio access stratum configuration is associated with one or more radio access stratum entities associated with the network entity; as well as Control plane or user plane traffic is relayed between the remote UE and the network entity via the one or more bearers.

42. The relay UE of claim 41, wherein the radio access layer configuration indicates a configuration for at least one of a radio link control entity, a medium access control entity, or a physical layer entity.

43. The relay UE of claim 41, wherein the radio access stratum configuration indication is for configuration of an adaptation layer entity.

44. The relay UE of claim 43, wherein the adaptation layer is part of a packet data convergence entity or a radio link control entity.

45. The relay UE of claim 41, wherein the one or more sidelink access stratum entities are associated with relay traffic based at least in part on a configuration of the one or more sidelink access stratum entities.

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