Layer 2 relay initial configuration

Abstract

In summary, various aspects of this disclosure relate to wireless communications. In some aspects, a relay user equipment (UE) can initiate a connection with a network entity. A relay UE can receive Layer 2 relay initial configuration, at least in part, based on the initiation of a connection. Numerous other aspects are provided.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to International Patent Application No. PCT / CN2020 / 110670, filed on August 23, 2020, entitled “LAYER 2RELAY INITIAL CONFIGURATION,” which is assigned to the assignee of this application. The disclosure of the earlier application is considered part of this patent application and is incorporated herein by reference. Technical Field

[0003] In summary, various aspects of this disclosure relate to wireless communication and to technologies and apparatus for configuring relay user equipment (UE). Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems 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 / Improved LTE is an enhanced set of the Universal Mobile Telecommunications System (UMTS) mobile standard released by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include multiple base stations (BSs) capable of supporting communication for multiple UEs. UEs can communicate with the BS via downlink and uplink. Downlink (or forward link) refers to the communication link from the BS to the UE, while 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 Node B, gNB, Access Point (AP), Radio Headend, Transmit / Receive Point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different user equipment to communicate at the city, country, region, and even global levels. NR (which can also be referred to as 5G) is an enhancement set of the LTE mobile standard released by 3GPP. NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation, thereby better supporting mobile broadband internet access. However, with the continued increase in demand for mobile broadband access, there is a need for further improvements to LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunications standards that adopt these technologies. Summary of the Invention

[0007] In some aspects, a method of wireless communication performed by a network entity includes performing a network connection establishment procedure for a user equipment (UE). The method includes transmitting, during the network connection establishment procedure, an indication that the UE has the capability to operate as a Layer 2 relay UE.

[0008] In some aspects, a network entity for wireless communication includes: a memory and one or more processors coupled to the memory. The memory and the one or more processors are configured to: perform a network connection establishment procedure for a UE. The memory and the one or more processors are configured to: during the network connection establishment procedure, transmit an indication that the UE has the capability to operate as a Layer 2 relay UE.

[0009] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a network entity, cause the network entity to perform a network connection establishment procedure for a UE. The one or more instructions, when executed by the one or more processors of the network entity, cause the network entity to send an indication during the network connection establishment procedure that the UE has the capability to operate as a Layer 2 relay UE.

[0010] In some aspects, an apparatus for wireless communication includes: a unit for performing a network connection establishment process for a UE. The apparatus further includes: a unit for transmitting, during the network connection establishment process, an indication that the UE has the capability to operate as a Layer 2 relay UE.

[0011] In some aspects, a method of wireless communication performed by a first UE includes initiating a connection with a network entity. The method includes receiving a Layer 2 relay initial configuration, at least in part based on initiating the connection.

[0012] In some aspects, a method of wireless communication performed by a network entity includes receiving an indication that a UE has the capability to operate as a Layer 2 relay UE. The method includes sending a Layer 2 relay initial configuration to the UE, at least in part based on receiving the indication.

[0013] In some aspects, a method of wireless communication performed by a first UE includes: receiving a request from a second UE to establish a Layer 2 relay service; and sending a Layer 2 relay initial configuration to the second UE based at least in part on the receipt of the request.

[0014] In some aspects, a method of wireless communication performed by a first UE includes sending a request to a second UE to establish a Layer 2 relay service. The method includes receiving a Layer 2 relay initial configuration from the second UE, at least in part, based on sending the request.

[0015] In some aspects, a first UE for wireless communication includes: a memory and one or more processors coupled to the memory. The memory and the one or more processors are configured to: initiate a connection with a network entity. The memory and the one or more processors are configured to: receive Layer 2 relay initial configuration at least in part based on initiating the connection.

[0016] In some aspects, a network entity for wireless communication includes: a memory and one or more processors coupled to the memory. The memory and the one or more processors are configured to: receive an indication that a UE has the capability to operate as a Layer 2 relay UE. The memory and the one or more processors are configured to: send a Layer 2 relay initial configuration to the UE, at least in part based on receiving the indication.

[0017] In some aspects, a first UE for wireless communication includes: a memory and one or more processors coupled to the memory. The memory and the one or more processors are configured to: receive a request from a second UE to establish Layer 2 relay service. The memory and the one or more processors are configured to: send Layer 2 relay initial configuration to the second UE, at least in part based on receiving the request.

[0018] In some aspects, a first UE for wireless communication includes: a memory and one or more processors coupled to the memory. The memory and the one or more processors are configured to: send a request to a second UE to establish Layer 2 relay service. The memory and the one or more processors are configured to: receive Layer 2 relay initial configuration from the second UE, at least in part, based on sending the request.

[0019] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to initiate a connection with a network entity. The one or more instructions, when executed by the one or more processors of the first UE, cause the first UE to receive Layer 2 relay initial configuration, at least in part based on initiating the connection.

[0020] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a network entity, cause the network entity to: receive an indication that a UE has the capability to operate as a Layer 2 relay UE. The one or more instructions, when executed by the one or more processors of the network entity, cause the network entity to: send a Layer 2 relay initial configuration to the UE, at least in part based on receiving the indication.

[0021] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to: receive a request from a second UE to establish a Layer 2 relay service. The one or more instructions, when executed by the one or more processors of the first UE, cause the first UE to: send a Layer 2 relay initial configuration to the second UE, at least in part based on receiving the request.

[0022] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to: send a request to a second UE to establish Layer 2 relay service. The one or more instructions, when executed by the one or more processors of the first UE, cause the first UE to: receive Layer 2 relay initial configuration from the second UE, at least in part, based on sending the request.

[0023] In some aspects, an apparatus for wireless communication includes: a unit for initiating a connection with a network entity. The apparatus further includes: a unit for receiving initial configuration of a Layer 2 relay, at least in part based on initiating the connection.

[0024] In some aspects, an apparatus for wireless communication includes: a unit for receiving an indication that a UE has the capability to operate as a Layer 2 relay UE. The apparatus further includes: a unit for transmitting a Layer 2 relay initial configuration to the UE, at least in part based on receiving the indication.

[0025] In some aspects, an apparatus for wireless communication includes: a unit for receiving a request from a UE to establish Layer 2 relay service. The apparatus further includes: a unit for transmitting an initial Layer 2 relay configuration to the UE, at least in part based on receiving the request.

[0026] In some aspects, an apparatus for wireless communication includes: a unit for sending a request to a UE to establish Layer 2 relay service. The apparatus includes: a unit for receiving Layer 2 relay initial configuration from the UE, at least in part, based on sending the request.

[0027] In general, the aspects include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems as fully described with reference to the accompanying drawings and description and as shown by the accompanying drawings and description.

[0028] The foregoing has provided a fairly broad overview of the features and technical advantages of examples according to this disclosure in order to better understand the following detailed description. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein (both their organization and manner of operation) and their associated advantages will be better understood when considered in conjunction with the accompanying drawings, based on the following description. Each drawing in the accompanying drawings is provided for illustrative and descriptive purposes and is not intended to define a limitation of the claims. Attached Figure Description

[0029] To gain a full understanding of the features described above, a more specific description of the brief overview can be obtained by referring to various aspects, some of which are shown in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of the disclosure and are therefore not intended to limit the scope of the disclosure, as other equally valid aspects are permissible under this description. The same reference numerals in different drawings may identify the same or similar elements.

[0030] Figure 1A and 1B This is a schematic diagram illustrating an example of a wireless network according to this disclosure.

[0031] Figure 2 This is a schematic diagram illustrating an example of a base station communicating with a relay user equipment (UE) in a wireless network according to the present disclosure, the relay UE communicating with a remote UE.

[0032] Figure 3 This is a schematic diagram illustrating an example of a control plane protocol architecture for Layer 2 UE to network relay according to this disclosure.

[0033] Figure 4 This is a schematic diagram illustrating an example of a user plane protocol architecture for Layer 2 UE to network relay according to this disclosure.

[0034] Figure 5 This is a schematic diagram illustrating an example of a control plane protocol architecture for Layer 2 lightweight UE to network relay according to this disclosure.

[0035] Figure 6 This is a schematic diagram illustrating an example of a user plane protocol architecture for Layer 2 lightweight UE to network relay according to this disclosure.

[0036] Figure 7 This is a schematic diagram illustrating an example of establishing a Layer 2 relay connection from a Layer 2 lightweight UE to a network relay in accordance with the present disclosure.

[0037] Figure 8 This is a schematic diagram illustrating an example of establishing a Layer 2 relay connection from a Layer 2 UE to a network relay in accordance with the present disclosure.

[0038] Figure 9 and 10 This is a schematic diagram illustrating an example of an initial configuration associated with a Layer 2 relay according to the present disclosure.

[0039] Figure 11-14 This is a schematic diagram illustrating an example process associated with the initial configuration of a Layer 2 relay according to the present disclosure.

[0040] Figure 15 This is a block diagram of an example device for wireless communication based on the present disclosure.

[0041] Figure 16 This is a schematic diagram illustrating an example of a hardware implementation of a device for employing a processing system according to the present disclosure.

[0042] Figure 17 This is a schematic diagram illustrating an example of the implementation of code and circuitry for a device according to this disclosure.

[0043] Figure 18 This is a block diagram of an example device for wireless communication based on the present disclosure.

[0044] Figure 19 This is a schematic diagram illustrating an example of a hardware implementation of a device for employing a processing system according to the present disclosure.

[0045] Figure 20 This is a schematic diagram illustrating an example of the implementation of code and circuitry for a device according to this disclosure.

[0046] Figure 21 This is a block diagram of an example device for wireless communication based on the present disclosure.

[0047] Figure 22 This is a schematic diagram illustrating an example of a hardware implementation of a device for employing a processing system according to the present disclosure.

[0048] Figure 23 This is a schematic diagram illustrating an example of the implementation of code and circuitry for a device according to this disclosure.

[0049] Figure 24 This is a schematic diagram illustrating an example process associated with UE capability signaling according to this disclosure.

[0050] Figure 25 This is a block diagram of an example device for wireless communication based on the present disclosure.

[0051] Figure 26 This is a schematic diagram illustrating an example of a hardware implementation of a device for employing a processing system according to the present disclosure.

[0052] Figure 27 This is a schematic diagram illustrating an example of the implementation of code and circuitry for a device according to this disclosure. Detailed Implementation

[0053] In a wireless network, a User Equipment (UE) can operate as a UE-to-network relay for another UE. In these cases, the UE performing the relay function can be referred to as the relay UE, and the UE providing the relay function to the relay UE can be referred to as the remote UE. In some cases, such as when the remote UE is outside the coverage area of ​​the base station for which the relay UE is providing relay function, when congestion or other types of obstacles cause reduced coverage for the remote UE, or when the remote UE can obtain reduced speed and increased bandwidth through the relay UE, the relay UE can operate as a UE-to-network relay for the remote UE (e.g., a UE relaying network services between the wireless network and another UE). In some cases, the relay UE can operate as a Layer 2 relay. In these cases, the relay UE can handle physical layer processing and Layer 2 processing between the remote UE and the base station. Layer 2 processing may include Media Access Control (MAC) layer processing, Radio Link Control (RLC) processing, and / or other Layer 2 functions. In some cases and communication scenarios, the configuration used for relay UEs may reduce the reliability of the connection between the remote UE and the base station via the relay UE, may increase latency on the connection, and / or may reduce throughput on the connection.

[0054] The aspects described herein provide techniques and apparatus for Layer 2 trunk initial configuration. Layer 2 trunk initial configuration includes the configuration for an auxiliary trunk UE (and / or a remote UE connected to the trunk UE for Layer 2 trunk services, for Layer 2 light trunk services, etc.) to send and receive initial radio resource control (RRC) messages to and from the NG-RAN. To establish an RRC connection between the remote UE and the base station via the trunk UE, Layer 2 trunk initial configuration can be provided to both the trunk UE and the remote UE, which can be used to send and receive initial remote UE RRC messages from the base station. Layer 2 trunk initial configuration can provide RLC, MAC, and physical layer configurations for both the remote UE and the trunk UE. Layer 2 trunk initial configuration can be dynamic because the RLC, MAC, and physical layer configurations provided therein can be configured for specific types of signaling radio bearers (SRBs) (such as SRB0) for the Uu (or access link) logical channel between the trunk UE and the base station. In this way, different types of SRBs can be configured for remote UEs and relay UEs using Layer 2 relay initial configuration. This can increase the reliability of the connection between the remote UE and the base station via the relay UE, reduce latency on the connection, increase throughput on the connection, enable dynamic relay configuration, and so on.

[0055] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, an apparatus or a method may be implemented using any number of the aspects set forth herein. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods implemented using structures, functions, or structures and functions other than or different from the aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0056] Several aspects of a telecommunications system will now be described with reference to various devices and techniques. These devices and techniques will be described in detail below and illustrated in the accompanying drawings, through various frames, 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 an element is implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0057] It should be noted that while this document may use terms commonly associated with 5G or NR radio access technology (RAT) to describe aspects, aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0058] Figure 1A and 1BThis is a schematic diagram illustrating an example of a wireless network 100 according to this disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network, an LTE network, etc. The wireless network 100 may include multiple base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a UE and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), Access Point, Transmit / Receive Point (TRP), etc. Each BS can provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0059] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed User Group (CSG)). A BS used for macrocells can be referred to as a macro BS. A BS used for picocells can be referred to as a pico BS. A BS used for femtocells can be referred to as a femtocell BS or a home BS. Figure 1A In the examples shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” are used interchangeably herein.

[0060] In some examples, the cell may not be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile BS. In some examples, BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transport network through various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.).

[0061] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and transmit the data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE capable of relaying transmissions for other UEs. Figure 1A In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, relay, etc.

[0062] Wireless network 100 can be a heterogeneous network comprising different types of Base Stations (BSs) (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs can have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs can have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0063] Network controller 130 can be coupled to a group of base stations (BSs) and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. BSs can also communicate with each other via wireless or wired backhaul (e.g., directly or indirectly).

[0064] Network controller 130 may include one or more devices in a core network, such as an evolved packet core (EPC), a 5G NR core (NGC), or another type of core network. Network controller 130 may communicate via communication unit 294 with the radio access network (RAN) of base station 110, which includes wireless network 100. The RAN may include an LTE RAN (e.g., Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA)), a 5G NR RAN (e.g., NG-RAN), or another type of RAN.

[0065] The core network functions of the core network can include various 5G NR core network functions, such as Access and Mobility Management (AMF) functions implemented by one or more network controllers 130, Session Management (SMF) functions implemented by one or more network controllers 130, and User Plane (UPF) functions implemented by one or more network controllers 130. These core network functions can communicate on core network interfaces (such as the N11 interface between AMF and SMF, and the N3 interface between AMF and UPF).

[0066] The AMF (Automatic Authentication and Management Function) can manage authentication, activation, deactivation, and / or mobility functions associated with UEs in the wireless network 100. The AMF can facilitate the selection of gateways (e.g., serving gateways, packet data network gateways, UPFs, etc.) to serve communications to and / or from UEs in the wireless network 100. In some aspects, the AMF device can perform operations associated with handover for UEs in the wireless network 100. The SMF (Service Authentication and Management Function) can manage communication sessions associated with UEs in the wireless network 100. The UPF can serve as a session anchor point and / or gateway for UEs in the wireless network 100, forwarding services (e.g., user plane services, application services, etc.) between UEs in the wireless network and application servers and / or other UPFs.

[0067] The RAN base station 110 and one or more core network functions implemented by one or more network controllers 130 in the core network can communicate on a core network interface. For example, base station 110 can communicate with the AMF on the N2 interface or another type of core network interface. As another example, base station 110 can communicate with the UPF on the N4 interface.

[0068] UE 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, user unit, station, etc. UE may be a cellular phone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet device, camera, gaming device, netbook, smartbook, ultrabook, medical device or apparatus, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), entertainment device (e.g., music or video device, or satellite radio unit), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0069] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, instruments, monitors, location tags, etc., which can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or to a network (e.g., a wide area network such as the Internet or cellular networks) via wired or wireless communication links, for example. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included within a housing housing the components of UE 120, such as processor components, memory components, etc. In some aspects, the processor components and memory components can be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) can be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, etc.

[0070] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0071] In some aspects, two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary for communication with each other). For example, UEs 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, vehicle-to-infrastructure (V2I) protocols, mesh networks, etc.). In some aspects, UEs 120 may perform scheduling operations, resource selection operations, and / or other operations described herein as being performed by base station 110.

[0072] Devices in Wireless Network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., by frequency or wavelength. For example, devices in Wireless Network 100 can communicate using one or more operating frequency bands. In 5G NR, two initial operating frequency bands have been identified as frequency range names FR1 (410MHz–7.125GHz) and FR2 (24.25GHz–52.6GHz). It should be understood that although a portion of FR1 is greater than 6GHz, FR1 is often (interchangeably) referred to as the “below 6GHz” band in various documents and articles. Similar naming issues sometimes arise regarding FR2; although it differs from the extremely high frequency (EHF) band (30GHz–300GHz), FR2 is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, while the EHF band is identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0073] The frequencies between FR1 and FR2 are often referred to as intermediate frequency (IF) frequencies. Recent 5G NR research has identified the operating bands of these IF frequencies as the frequency range name FR3 (7.125 GHz – 24.25 GHz). Bands falling within FR3 can inherit FR1 and / or FR2 characteristics, and thus can effectively extend the characteristics of FR1 and / or FR2 into the IF frequency range. Furthermore, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating frequency bands have been identified as the frequency range names FR4a or FR4–1 (52.6 GHz – 71 GHz), FR4 (52.6 GHz – 114.25 GHz), and FR5 (114.25 GHz – 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0074] Considering the examples above, unless otherwise specifically stated, it should be understood that, if used herein, the terms "below 6 GHz," etc., can broadly refer to frequencies that are less than 6 GHz, within FR1, or may include intermediate frequency bands. Furthermore, unless otherwise specifically stated, it should be understood that, if used herein, the terms "millimeter wave," etc., can broadly refer to frequencies that may include intermediate frequency bands, within FR2, FR4, FR4-a, or FR4-1 and / or FR5, or within the EHF band. It is anticipated that the frequencies included in these operating frequency bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0075] In some respects, UE 120 can operate as a UE-to-network relay for another UE 120 in wireless network 100. For example, and as... Figure 1A As shown, UE 120a can operate as a UE-to-network relay for UE 120e. In these examples, UE 120a can communicate with base station 110 on an access link (e.g., a Uu link) and can also communicate with UE 120e on non-Uu links (such as sidelinks (e.g., PC5 links), WiFi links, WiFi Direct (WiFi-D) links, Bluetooth (BT), Bluetooth Low Energy (BTLE), and / or other types of local connections) to relay communication between UE 120e and base station 110. In some aspects, UE 120a can operate as a UE-to-network relay for UE 120e in examples where UE 120e is located outside the coverage area of ​​base station 110 served by UE 120a, where congestion or other types of obstacles cause a decrease in coverage for UE 120e, where UE 120e can obtain reduced speed and increased bandwidth through UE 120a, etc. In some aspects, UE 120a can operate as a Layer 2 relay. In these cases, UE 120a can handle physical layer processing and layer 2 processing between UE 120e and base station 110. Layer 2 processing may include MAC layer processing, RLC processing, and / or other layer 2 functions.

[0076] like Figure 1A As shown, UE 120 (e.g., a relay UE (such as UE 120a)) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may initiate a connection with a network entity such as base station 110a, may receive a Layer 2 relay initial configuration at least in part based on the initiation of the connection, and so on. As described in more detail elsewhere herein, the communication manager 140 may receive a request to establish Layer 2 relay service from a remote UE such as UE 120e, may send a Layer 2 relay initial configuration to the remote UE at least in part based on receiving the request, and so on. Alternatively or additionally, the communication manager 140 may perform one or more other operations described herein.

[0077] In some aspects, base station 110 may include communication manager 150. As described in more detail elsewhere herein, communication manager 150 may receive an indication that UE 120 (e.g., UE 120a) has the capability to operate as a Layer 2 relay UE, and may send a Layer 2 relay initial configuration to UE 120, at least in part, based on receiving that indication, etc. Additionally or alternatively, communication manager 150 may perform one or more other operations described herein.

[0078] In some aspects, UE 120 (e.g., a remote UE such as UE 120e) may include a communication manager 160. As described in more detail elsewhere herein, the communication manager 160 may send a request to a relay UE such as UE 120a to establish Layer 2 relay service, may receive Layer 2 relay initial configuration from the relay UE at least in part based on sending that request, and so on. Alternatively or additionally, the communication manager 150 may perform one or more other operations described herein.

[0079] Figure 1B This is a schematic diagram illustrating an example of a decomposed RAN, distributed RAN, or open RAN (O-RAN) architecture that can be implemented in at least a portion of a wireless network 100. For example... Figure 1B As shown, the O-RAN architecture may include a control unit (CU) 170 that communicates with the core network 175 via a backhaul link. The core network 175 may include multiple network controllers 130 (e.g., network entities) implementing core network functions, such as those described above. Figure 1A Neutralize and / or as described elsewhere herein. Furthermore, CU 170 can communicate with one or more distributed units or decomposed units (DUs) 180 via respective mid-range links. DUs 180 can each communicate with one or more radio units (RUs) 185 via respective front-end links, and RUs 185 can each communicate with their respective UEs 120 via radio frequency (RF) access links. DUs 180 and RUs 185 may also be referred to as O-RAN DU (O-DU) 180 and O-RAN RU (O-RU) 180, respectively.

[0080] In some aspects, the DU 180 and RU 185 can be implemented according to a functional split architecture, wherein the functionality of the base station 110 (e.g., eNB or gNB) is provided by the DU 180 and one or more RU 185 communicating via a frontend link. Therefore, as described herein, the base station 110 may include the DU 180 and one or more RU 185, which may be co-located or geographically distributed. In some aspects, the DU 180 and the associated RU 185 may communicate via a frontend link to exchange real-time control plane information via a Lower Layer Split (LLS) Control Plane (LLS-C) interface, non-real-time management information via an LLS Management Plane (LLS-M) interface, and / or user plane information via an LLS User Plane (LLS-U) interface.

[0081] Therefore, DU 180 can correspond to a logical unit that includes one or more base station functions to control the operation of one or more RU 185s. For example, in some aspects, DU 180 can host the Radio Link Control (RLC) layer, the Medium Access Control (MAC) layer, and one or more high physical (PHY) layers (e.g., forward error correction (FEC) encoding and decoding, scrambling, and / or modulation and demodulation) based at least in part on lower-layer function splitting. Higher-layer control functions (such as Packet Data Convergence Protocol (PDCP), Radio Resource Control (RRC), and / or Service Data Adaptation Protocol (SDAP)) can be hosted by CU 170. Based at least in part on lower-layer function splitting, RU 185 controlled by DU 180 can correspond to a logical node hosting RF processing functions and low PHY layer functions (e.g., Fast Fourier Transform (FFT), Inverse FFT (iFFT), Digital Beamforming, and / or Physical Random Access Channel (PRACH) extraction and filtering). Therefore, in the O-RAN architecture, RU 185 handles all over-the-air (OTA) communications with UE 120, and the real-time and non-real-time aspects of control and user plane communications with RU 185 are controlled by the corresponding DU180, which enables DU 180 and CU 170 to be implemented in a cloud-based RAN architecture.

[0082] As pointed out above, Figure 1A and 1B This is provided as an example only. Other examples may differ from those provided. Figure 1A and 1B The example described.

[0083] Figure 2 This is a schematic diagram illustrating an example 200 of a base station 110 in a wireless network 100 according to the present disclosure communicating with a relay UE 120 (e.g., UE 120a) and a remote UE 120 (e.g., UE 120e). The base station 110 may be equipped with T antennas 234a to 234t, and UE 120a and UE 120e may each be equipped with R antennas 252a to 252r, wherein generally, T ≥ 1 and R ≥ 1.

[0084] At base station 110, transmitting processor 220 can receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQI) received from each UE, process (e.g., code and modulate) the data for each UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. Transmitting processor 220 can also process system information (e.g., semi-static resource allocation information (SRPI), etc.) and control information (e.g., CQI requests, permission, upper-layer signaling, etc.), and provide overhead symbols and control symbols. Transmitting processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS), demodulation reference signals (DMRS), etc.) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding, if applicable) on data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can (e.g., for OFDM, etc.) process its corresponding output symbol stream to obtain an output sample stream. Each modulator 232 can 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 can be transmitted via T antennas 234a to 234t respectively.

[0085] At UE 120a and UE 120e, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations, and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can adjust (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM, etc.) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. Receiver processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for each of UE 120a and UE 120e to data sink 260, and provide decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. A channel processor can determine the Received Reference Signal Power (RSRP), Received Signal Strength Indicator (RSSI), Received Reference Signal Quality (RSRQ), CQI, etc. In some aspects, one or more components of UE 120a and / or UE 120e may be included in a housing.

[0086] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include, for example, implementations of the core network described above. Figure 1A One or more of the core network functions described herein, and / or one or more devices. Figure 1B The core network 175 includes one or more components. The network controller 130 can communicate with the base station 110 via the communication unit 294.

[0087] On the uplink, at UE 120a and UE 120e, the transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 can also generate reference symbols for one or more reference signals. Symbols from the transmit processor 264 can be pre-coded (if applicable) by the TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to base station 110. In some aspects, UE 120a and UE 120e each include a transceiver. The transceiver can include any combination of antenna 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein.

[0088] At base station 110, uplink signals from UE 120a and / or UE 120e (and other UEs) can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 (if applicable), and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120a and / or UE 120e. Receiver processor 238 can provide decoded data to data sink 239 and decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule UE 120 (e.g., UE 120a, UE 120e, etc.) for downlink and / or uplink communication. In some aspects, base station 110 includes a transceiver. The transceiver may include any combination of antenna 234, modulator and / or demodulator 232, MIMO detector 236, receiver processor 238, transmitter processor 220 and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein.

[0089] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120a and UE 120e and / or Figure 2Any other components may perform one or more techniques associated with the initial configuration of the Layer 2 relay, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120a and UE 120e, and / or Figure 2 Any other component can perform or direct, for example Figure 11 Process 1100 Figure 12 Process 1200 Figure 13 Process 1300 Figure 14 The operation of process 1400 and / or other processes as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120a and UE 120e, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code, program code, etc.) for wireless communication. For example, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120a and / or UE 120e (e.g., directly, or after compilation, translation, and / or interpretation, etc.), may cause one or more processors, UE 120a, UE 120e, and / or base station 110 to perform or direct, for example... Figure 11 Process 1100 Figure 12 Process 1200 Figure 13 Process 1300 Figure 14 The operation of process 1400 and / or other processes as described herein. In some aspects, the execution instructions may include run instructions, translation instructions, compilation instructions, interpretation instructions, and so on.

[0090] In some aspects, UE 120a may include: a unit for initiating a connection with a network entity (e.g., base station 110); a unit for receiving a Layer 2 relay initial configuration at least in part based on the initiation of the connection; and so on. In some aspects, UE 120a may include: a unit for receiving a request to establish Layer 2 relay service from a remote UE (e.g., UE 120e); a unit for sending a Layer 2 relay initial configuration to the remote UE at least in part based on the receipt of the request; and so on. Additionally or alternatively, UE 120a may include a unit for performing one or more other operations described herein. In some aspects, such a unit may include a communication manager 140. Additionally or alternatively, such a unit may include a combination of Figure 2 One or more other components of the described UE 120a, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0091] In some aspects, base station 110 may include: a unit for receiving an indication that a UE (e.g., UE 120a) has the capability to operate as a Layer 2 relay UE; a unit for transmitting a Layer 2 relay initial configuration to the UE, at least in part based on receiving the indication; and so on. Additionally or alternatively, base station 110 may include a unit for performing one or more other operations described herein. In some aspects, such a unit may include a communication manager 150. In some aspects, such a unit may include a combination of... Figure 2 One or more other components of the described base station 110, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.

[0092] In some aspects, UE 120e may include: a unit for sending a request to a relay UE (e.g., UE 120a) to establish Layer 2 relay service; a unit for receiving Layer 2 relay initial configuration from the relay UE based at least in part on the sending request; and so on. Alternatively or additionally, UE 120e may include a unit for performing one or more other operations described herein. In some aspects, such a unit may include a communication manager 160. Alternatively or additionally, such a unit may include a combination of... Figure 2 One or more other components of the described UE 120e, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0093] In some aspects, the network controller 130 includes: a unit for performing a network connection establishment procedure for the UE 120; a unit for transmitting an indication during the network connection establishment procedure that the UE 120 has the capability to operate as a Layer 2 relay UE; and so on. In some aspects, such a unit may include a combination of Figure 2 One or more other components of the network controller 130 described, such as controller / processor 290, memory 292, communication unit 294, etc.

[0094] Although Figure 2 The boxes in the diagram are shown as different components, but the functions described above with respect to these boxes can be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by or under the control of controller / processor 280.

[0095] As pointed out above, Figure 2 This is provided as an example only. Other examples may differ from those provided. Figure 2 The example described.

[0096] Figure 3 This is a schematic diagram illustrating an example of a control plane protocol architecture 300 for a Layer 2 UE to a network relay (also referred to herein as a relay UE) in accordance with the present disclosure. Figure 4 This is a schematic diagram illustrating an example of a user plane protocol architecture 400 for Layer 2 UE to network relay according to 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 120e) shown by reference numerals 305 and 405 and a relay UE (e.g., UE 120a) shown by reference numerals 310 and 410.

[0097] like Figure 3 As shown, in the control plane, there may be a local interface (e.g., a sidelink interface, PC5 interface, WiFi interface, WiFi-D interface, BT interface, BTLE interface and / or another type of local interface) between the remote UE and the relay UE, a Uu interface (e.g., an access link interface) between the relay UE and the next-generation radio access network (NG-RAN, also referred to herein as the 5G access network (5G-AN)), an N2 interface between the NG-RAN and the AMF (e.g., which may be implemented by the network controller 130) of the control plane protocol architecture 300, and an N11 interface between the AMF and the SMF (e.g., which may be implemented by the network controller 130).

[0098] like Figure 4 As shown, there may be an N3 interface between the NG-RAN of the user plane protocol architecture 400 and the UPF (e.g., which may be implemented by the network controller 130), and an N6 interface between the UPF and the core network (CN).

[0099] As further illustrated, remote UEs and relay UEs can be associated with corresponding local protocol stacks 315 / 320 and 415 / 420 (e.g., sidelink protocol stacks, PC5 protocol stacks, WiFi protocol stacks, WiFi-D protocol stacks, BT protocol stacks, BTLE protocol stacks, and / or another type of local protocol stack) to enable communication between remote UEs and relay UEs on a local interface. The local protocol stack may include local RLC components, local MAC components, local physical (PHY) components, etc. Communication between remote UEs and relay UEs using the local interface can be referred to as sidelink communication or local communication. The corresponding local protocol stack can be associated with one or more of the following: PC5-S entity, PC5-RRC entity, PC5-PDCP entity, local connection entity, sidelink entity, etc. The PC5-S entity can manage the sidelink signaling interface, such as the PC5-S interface. A UE including a PC5-S entity and / or a PC5-RRC entity can handle control signaling and configuration for sidelink connections with another UE (such as connections used for relaying between a remote UE and a relay UE). In some aspects, PC5 protocol stacks 315 / 320 and 415 / 420 may not include a PC5-S entity or a PC5-RRC entity. In such cases, NG-RAN can handle control signaling and configuration for sidelink connections.

[0100] As by Figure 3 As shown by reference numeral 330 in the attached figure, the remote UE is associated with a Non-Access Stratum (NAS) stack, which includes a NAS Session Management (NAS-SM) component, a NAS Mobility Management (NAS-MM) component, and one or more radio access components (e.g., NR-RRC and NR-PDCP components). Figure 3 As shown by reference numeral 335 in the accompanying drawings, the relay UE is associated with a radio access stack, which includes NR-RLC components, NR-MAC components, and NR-PHY components. Furthermore, the NG-RAN is associated with a radio access interface stack, as shown by reference numeral 340, which includes NR-RLC components, NR-MAC components, NR-PHY components, NR-RRC entities, and NR-PDCP entities.

[0101] The adaptation layer entity of the relay UE, as shown by reference numeral 345, can handle relaying, bearer mapping, and remote UE identification from the remote UE to the network or from the network to the remote UE. As used herein, "network" can refer to any one or more of NG-RAN, AMF, SMF, UPF, or CN. In some aspects, the adaptation layer is referred to as an adaptation layer entity. In some aspects, the adaptation layer entity can be a separate entity between the radio link control entity and the packet data aggregation entity. In some aspects, the adaptation layer entity can be a logical part of the packet data aggregation entity or the radio link control entity.

[0102] Communication between stacks of remote UEs is indicated by the lines shown in reference numeral 350. The line between the NR-PDCP entity and the PC5-RLC entity indicates how messages not encapsulated in a sidelink signaling container (such as a PC5-S container) might be passed from the radio access stack to the local stack for transmission via the sidelink interface, or how messages not encapsulated in a PC5-S container are passed from the local stack to the radio access stack after being received via the sidelink interface. Note that the line between the NR-PDCP entity and the PC5-RLC entity does not involve the PC5-S or PC5-PDCP entities, meaning that the PC5-S and PC5-PDCP entities do not process such messages. A similar line is shown to indicate communication between the adaptation layer and the PC5-RLC entity, which bypasses the PC5-S and PC5-PDCP entities of the relay UE.

[0103] In some aspects, the remote UE may also include a PC5-S or PC5-RRC entity. In these examples, another communication line between the NR-PDCP entity and the PC5-S or PC5-RRC entity can be used to transmit messages encapsulated in a PC5-S container (e.g., NR RRC messages generated by the radio access protocol stack) from the radio access stack to the local stack for transmission via the sidelink interface, or to transmit messages encapsulated in a PC5-S container from the local stack to the radio access stack after being received via the sidelink interface. It is noteworthy that the line between the NR-PDCP entity and the PC5-RLC entity involves the PC5-S entity, meaning that the PC5-S entity can process such messages.

[0104] As by Figure 4As shown by reference numeral 425, the remote UE is associated with a user plane protocol stack, which may include application (APP) components, protocol data unit (PDU) components, NR-SDAP components, and NR-PDCP components. Furthermore, the NG-RAN is associated with a user plane component shown by reference numeral 430, which includes NR-SDAP components and NR-PDCP components. The NR-SDAP and NR-PDCP components may be referred to herein as radio access entities.

[0105] NR user plane services (indicated by the line indicated by "NR UP") can be transmitted between the NR-PDCP entity and the PC5-RLC component, as shown by reference numeral 435. Such NR user plane services can be transmitted to the relay UE via one or more bearers (such as established data radio bearers (DRBs) or SRBs). As shown by reference numeral 440, NR user plane services can be provided from the relay UE's PC5 stack to the adaptation component and from the adaptation component to the relay UE's radio access stack. The relay UE's radio access stack can provide NR user plane services (not shown) to the NG-RAN. Sidelink communications, such as PC5 control message transmissions, can occur between the remote UE's PC5-SDAP component and the relay UE.

[0106] As pointed out above, Figure 3 and 4 This is provided as an example. Other examples may differ from the one provided. Figure 3 and 4 The example described.

[0107] Figure 5 This is a schematic diagram illustrating an example of a control plane protocol architecture 500 for Layer 2 lightweight UE to network relay according to the present disclosure. Figure 6 This is a schematic diagram illustrating an example of a user plane protocol architecture 600 for Layer 2 lightweight UE-to-network relay according to the present disclosure. For example, the control plane protocol architecture 500 and the user plane protocol architecture 600 may correspond to a remote UE (e.g., UE 120e) shown by reference numerals 505 and 605 and a relay UE (e.g., UE 120a) shown by reference numerals 510 and 610.

[0108] Layer 2 lightweight UE to network relay can perform relay operations at Layer 2 of the protocol stack. (In conjunction with the above...) Figure 3 and 4Unlike the Layer 2 UE-to-network relay shown and described, the Layer 2 Light UE-to-network relay can locally manage the link between the Layer 2 Light UE-to-network relay and the remote UE (e.g., as opposed to the link being managed by NG-RAN). The link between the Layer 2 Light UE-to-network relay and the remote UE can be referred to as a non-Uu link because it can support PC5 (e.g., sidelink) and / or other types of wireless access technologies such as Bluetooth, Bluetooth Low Energy (BLE), Wi-Fi Direct, Wi-Fi, etc.

[0109] like Figure 5 As shown, in the control plane, there may be a non-Uu interface between the remote UE and the relay UE, a Uu interface (e.g., access link interface) between the relay UE and the 5G-AN, an N2 interface between the NG-RAN and the AMF of the control plane protocol architecture 500, and an N11 interface between the AMF (e.g., which can be implemented by the network controller 130) and the SMF (e.g., which can be implemented by the network controller 130).

[0110] like Figure 6 As shown, there may be an N3 interface between the NG-RAN and the UPF of the user plane protocol architecture 600 (e.g., which may be implemented by the network controller 130), and an N6 interface between the UPF and the CNW.

[0111] As further illustrated, remote UEs and relay UEs can be associated with corresponding non-Uu protocol stacks 515 / 520 and 615 / 620 to enable communication between the remote UE and the relay UE on the non-Uu interface. The non-Uu protocol stack may include non-Uu-L2 components (which may include one or more components, such as one or more RLC components for different types of radio access technologies, one or more MAC components, etc.), non-Uu-PHY components, etc. Communication between a remote UE and a relay UE using the non-Uu interface can be referred to as sidelink communication, P2P communication, or another type of communication.

[0112] As by Figure 5 As shown by reference numeral 530 in the attached figure, the remote UE is associated with a NAS stack, which includes a NAS-SM component, a NAS-MM component, and one or more radio access components (e.g., an NR-RRC component and an NR-PDCP component). Figure 5As shown by reference numeral 535, the relay UE is associated with a radio access stack, which includes NR-RLC components, NR-MAC components, and NR-PHY components. Furthermore, the NG-RAN is associated with a radio access interface stack, as shown by reference numeral 540, which includes NR-RLC components, NR-MAC components, NR-PHY components, NR-RRC entities, and NR-PDCP entities.

[0113] In some aspects, compared to the above combination Figure 3 and 4 The description of the Layer 2 UE to network relay, Figure 5 and 6 Layer 2 lightweight UEs to network relays can handle relatively few connections with remote UEs. Therefore, it is possible to... Figure 5 and 6 The Layer 2 lightweight UE to network relay omits the adapter relay component because Figure 5 and 6 Layer 2 lightweight UEs to the network relay layer may not need to handle the multiplexing of services used by multiple remote UEs. In some cases, Figure 5 and 6 Layer 2 lightweight UE-to-network relay can be associated with a single remote UE and can relay services for a specific UE. In some aspects, an adaptation layer can be included in some aspects used for Layer 2 lightweight UE-to-network relay.

[0114] Communication between stacks of remote UEs is indicated by line indication as shown in reference numeral 550. Line indication between NR-PDCP entities and non-Uu-L2 entities is not encapsulated in a side-link signaling container. Messages (e.g., NR RRC messages generated by the radio access protocol stack) can be transmitted from the radio access stack to the non-Uu stack for transmission via the non-Uu interface.

[0115] As by Figure 6 As shown by reference numeral 625, the remote UE is associated with a user plane protocol stack, which may include an APP component, a PDU component, an NR-SDAP component, and an NR-PDCP component. Furthermore, the NG-RAN is associated with a user plane component shown by reference numeral 630, which includes an NR-SDAP component and an NR-PDCP component. The NR-SDAP component and the NR-PDCP component may be referred to herein as radio access entities.

[0116] NR user plane services (indicated by the line indicated by "NR UP") can be transmitted between NR-PDCP entities and non-Uu-L2 components, as shown by reference numeral 635. Such NR user plane services can be transmitted to the relay UE via one or more bearers (such as DRBs).

[0117] As pointed out above, Figure 5 and 6 This is provided as an example. Other examples may differ from the one provided. Figure 5 and 6 The example described.

[0118] Figure 7 This is a schematic diagram illustrating Example 700 of establishing a Layer 2 relay connection from a Layer 2 lightweight UE to a network relay according to this disclosure. Figure 7 As shown, Example 700 includes communication between remote UEs (e.g., UE 120e, remote UE 505, remote UE 605, etc.), Layer 2 light relay UEs (e.g., UE 120a, relay UE 510, relay UE 610, etc.), NG-RAN (e.g., base station 110), and one or more 5G core network (5GC) components (e.g., AMF component, SMF component, UPF component, network controller 130, etc.).

[0119] As in Figure 7 As shown by reference numeral 705 in the accompanying drawings, a remote UE and a relay UE can perform relay discovery and selection (or reselection) to discover each other. The remote UE and the relay UE can determine that the remote UE has requested Layer 2 Light Relay service. For example, the relay UE can determine that the remote UE has requested Layer 2 Light Relay service based at least in part on a notification message or request message. In some aspects, the relay UE can determine that the remote UE has requested Layer 2 based at least in part on a reserved Layer 2 Light Relay service code associated with the Layer 2 relay. For example, the Layer 2 Light Relay service code can indicate the type of Layer 2 Light Relay service the remote UE wishes to perform. If the Layer 2 Light Relay service code has a specific value or is within a specific range, the relay UE can determine that the Layer 2 Light Relay service is a Layer 2 Light Relay service. In some aspects, one or more bits of the relay service code (e.g., one or more first bits) can indicate which type of UE to NW relay service is supported. For example, a first bit value (e.g., 00) may indicate a Layer 3 trunk, a second bit value (e.g., 01) may indicate a Layer 2 light trunk, and a third bit value (e.g., 10) may indicate both Layer 2 light trunk and Layer 3 trunk. In some aspects, the trunk service code may indicate support for Layer 3 trunk, Layer 2 light trunk, or both via a field or flag value received during policy provisioning for the corresponding UE.

[0120] As in Figure 7 As shown by reference numeral 710 in the accompanying drawings, a remote UE and a relay UE can establish a local connection between the remote UE and the relay UE. This local connection can include non-Uu connections, such as PC5 connections (e.g., sidelink connections), Bluetooth connections, BLE connections, Wi-Fi direct connections, and / or another type of wireless communication. In some aspects, the remote UE and the relay UE can manage the local connection between the remote UE and the relay UE without assistance from the NG-RAN.

[0121] As in Figure 7 As further illustrated by reference numerals 715 and 720, a remote UE can establish a Uu (or access link) connection with NG-RAN and 5GC, which may include establishing a remote UE control context for the remote UE at the relay UE. In one example, the remote UE control context at the relay UE includes only the establishment of the Uu RLC channel corresponding to the remote UE SRB, and does not include the remote UE-to-relay link RLC channel context for Layer 2 light trunking. For example, a remote UE (e.g., via a relay UE) can perform RRC connection / access stratum (AS) security context establishment with the AMF of NG-RAN and / or 5GC. Furthermore, a remote UE (e.g., via a relay UE) can perform NAS connection / NAS security context establishment with the AMF of NG-RAN and / or 5GC.

[0122] As in Figure 7 As further illustrated by reference numerals 725 and 730, the remote UE can establish and / or modify remote UE PDU sessions with the 5G-RAN and 5GC. This can include establishing a remote UE data context for the remote UE at the relay UE. In one example, the remote UE data context at the relay UE includes only the establishment of the Uu RLC channel corresponding to the remote UE DRB, and not the remote UE-to-relay link RLC channel context for Layer 2 light relay. Thereafter, and as illustrated by reference numeral 735, the remote UE and relay UE can transmit relay services with the 5GC's UPF.

[0123] As pointed out above, Figure 7 This is provided as an example. Other examples may differ from the one provided. Figure 7 The example described.

[0124] Figure 8 This is a schematic diagram illustrating example 800 of establishing a Layer 2 relay connection from a Layer 2 UE to a network relay in accordance with this disclosure. Figure 8As shown, Example 800 includes communication between remote UEs (e.g., UE 120e, remote UE 305, remote UE 405, etc.), Layer 2 relay UEs (e.g., UE 120a, relay UE 310, relay UE 410, etc.), NG-RANs (e.g., base station 110, NG-RAN 340, NG-RAN 440, etc.) and one or more 5GC components (e.g., AMF component, SMF component, UPF component, network controller 130, etc.).

[0125] As in Figure 8 As shown by reference numeral 805 in the accompanying drawings, a remote UE and a relay UE can perform relay discovery and selection (or reselection) to discover each other. The remote UE and the relay UE can determine that the remote UE has requested Layer 2 relay service. For example, the relay UE can determine that the remote UE has requested Layer 2 relay service based at least in part on a notification message or request message. In some aspects, the relay UE can determine that the remote UE has requested Layer 2 based at least in part on a reserved relay service code associated with Layer 2 relay. For example, the relay service code can indicate the type of Layer 2 relay service the remote UE wishes to perform. If the relay service code has a specific value or is within a specific range, the relay UE can determine that the Layer 2 relay service is a Layer 2 relay service. In some aspects, one or more bits of the relay service code (e.g., one or more first bits) can indicate which type of UE to NW relay service is supported. For example, a first bit value (e.g., 00) may indicate a Layer 3 trunk, a second bit value (e.g., 01) may indicate a Layer 2 trunk, and a third bit value (e.g., 10) may indicate both Layer 2 and Layer 3 trunks. In some aspects, the trunk service code may indicate support for Layer 3 trunks, Layer 2 trunks, or both via a field or flag value received during policy provisioning for the corresponding UE.

[0126] As in Figure 8 As further illustrated by reference numeral 810, the remote UE, relay UE, NG-RAN, and 5GC can establish a local connection between the remote UE and the relay UE, and a Uu (e.g., access link) connection between the relay UE and the NG-RAN. The local connection may include a PC5 (e.g., sidelink) connection, WiFi-D, WiFi, BT, BTLE, and / or another type of local connection. Establishing a local connection for the sidelink may include, for example, the relay UE, NG-RAN, and 5GC establishing a ProSe UE-to-network relay secure flow set for the remote UE (reference numeral 810a), and establishing a PC5 unicast link and a PC5-RRC context for the remote UE (reference numeral 810b).

[0127] As in Figure 8As further illustrated by reference numerals 815 and 820, a remote UE can establish a Uu (or access link) connection with NG-RAN and 5GC, which may include establishing a remote UE control context for the remote UE at the relay UE. In one example, the remote UE control context includes a Uu RLC channel configuration for the remote UE, an adaptation configuration at the relay UE, and a Pc5RLC channel configuration. For example, the remote UE (e.g., via a relay UE) can perform RRC connection / AS security context establishment with the AMF of NG-RAN and / or 5GC. Furthermore, the remote UE (e.g., via a relay UE) can perform NAS connection / NAS security context establishment with the AMF of NG-RAN and / or 5GC.

[0128] As in Figure 8 As further illustrated by reference numerals 825 and 830, a remote UE can establish and / or modify a remote UE PDU session with the 5G-RAN and 5GC, which may include establishing a remote UE data context for the remote UE at the relay UE. In one example, the remote UE data context includes the Uu RLC channel configuration of the remote UE for the remote UE DRB, the adaptation configuration at the relay UE, and the Pc5 RLC channel configuration.

[0129] In some aspects, unlike the local connection between a Layer 2 lightweight UE and a network trunk and remote UE (which is locally managed between the remote UE and the trunk UE), NG-RAN can control the local connection (e.g., PC5 unicast link) between the remote UE and the trunk UE during Uu connection establishment (e.g., at reference numerals 815 and 820) and / or during remote PDU session establishment (e.g., at reference numerals 825 and 830). Thereafter, and as indicated by reference numeral 835, the remote UE and the trunk UE can transmit trunk services with the 5GC's UPF.

[0130] As pointed out above, Figure 8 This is provided as an example. Other examples may differ from the one provided. Figure 8 The example described.

[0131] Figure 9 This is a schematic diagram illustrating Example 900 associated with an initial configuration of a Layer 2 relay according to the present disclosure. In some aspects, Example 900 can be considered as described above in conjunction with... Figure 7 The description is part of establishing a Layer 2 trunk connection from a Layer 2 lightweight UE to a network trunk and / or as combined with the above. Figure 8 This is described as part of establishing a Layer 2 trunk connection from a Layer 2 UE to a network trunk. For example... Figure 9As shown, Example 900 may include a relay UE (e.g., UE 120a, relay UE 310, relay UE 410, relay UE 510, relay UE 610, etc.). Figure 7 And / or the relay UE described in 8, etc.), NG-RAN (e.g., base station 110, NG-RAN 340, NG-RAN 440, NG-RAN 540, NG-RAN 640, combined with the above). Figure 7 Communication between NG-RAN (as described in 8) and one or more 5GC components (e.g., AMF component, SMF component, UPF component, network controller 130, etc.).

[0132] As in Figure 9 As shown by reference numeral 905 in the accompanying drawing, one or more components of the relay UE, NG-RAN, and 5GC can perform a network connection establishment procedure for the relay UE. The network connection establishment procedure includes the process of establishing and / or creating a NAS connection between the relay UE and the 5GC. The relay UE can initiate a network connection establishment procedure with the NG-RAN to establish a new connection with the NG-RAN, transition out of RRC idle mode, transition out of RRC inactive mode, etc. In some aspects, the relay UE can be in the coverage area of ​​the NG-RAN and can initiate a network connection establishment procedure with a network entity (e.g., NG-RAN, AMF, etc.) as part of the NAS connection establishment with the 5GC. The network connection establishment procedure may include a registration procedure that may include the NAS connection establishment procedure, wherein the relay UE, NG-RAN, and / or 5GC components perform authentication and security establishment as part of the NAS registration procedure. In some aspects, the NAS connection establishment procedure may include the relay UE, NG-RAN, and / or 5GC components performing AS security establishment during the RRC connection establishment procedure. In some aspects, the registration procedure can be performed according to 3GPP TS23.502. In some aspects, the network connection establishment process may include a service request process, in which the relay UE, NG-RAN, and / or 5GC components perform authentication and security establishment as part of the relay UE transitioning out of idle mode to activate and obtain service on the connection between the relay UE and NG-RAN. In some aspects, the service request process may be performed in accordance with 3GPP TS23.502.

[0133] As in Figure 9As further illustrated by reference numeral 910 in the accompanying figure, once authentication with NG-RAN and 5GC is successful, the 5GC's AMF can provide the UE context to NG-RAN. The UE context can be associated with a relay UE. The AMF can provide the UE context to NG-RAN via a core network interface such as the N2 interface. Furthermore, the AMF can provide NG-RAN with indications regarding the relay UE's capability to operate as a Layer 2 relay UE (e.g., operating as a Layer 2 UE that forwards or relays Layer 2 services between a wireless network and a remote UE). Indications regarding the UE's capability to operate as a Layer 2 relay UE may include, for example, indications of Layer 2 relay authorization (e.g., the relay UE is authorized to operate as a Layer 2 relay and is authorized to forward or relay Layer 2 services between a wireless network and a remote UE), as shown in... Figure 9 The indication is provided in the N2 message (which is the message type sent via the N2 interface) or another core network interface.

[0134] As in Figure 9 As further illustrated by reference numeral 915 in the accompanying drawing, NG-RAN can provide a Layer 2 trunk initial configuration to a trunk UE. In some aspects, NG-RAN can provide the Layer 2 trunk initial configuration to a trunk UE based at least in part on an indication received from the AMF that the trunk UE has the capability to operate as a Layer 2 trunk UE. In some aspects, NG-RAN can send the Layer 2 trunk initial configuration to the trunk UE in an RRC message (such as an RRC reconfiguration message, an RRC recovery message, or another type of RRC message).

[0135] The initial configuration for a Layer 2 relay may include one or more configurations for an auxiliary relay UE (and / or a remote UE connected to a relay UE for Layer 2 relay services, for Layer 2 light relay services, etc.) to send and receive initial RRC messages from the NG-RAN. One or more configurations may be configured for one or more SRB types, such as SRB 0 (SRB0) or another type of SRB. One or more configurations may include RLC configurations (e.g., access link or Uu-RLC channel configurations for relaying access link SRB services for remote UEs), adaptation configurations (e.g., the type of adaptation layer entity configuration for the relay UE of the SRB that maps access link or Uu RLC channels to non-Uu RLC channels (e.g., PC5 or sidelink RLC channels, WiFi, WiFi-D, BT, BTLE, etc.), sidelink or PC5 RLC channel configurations for relaying services for remote UEs on sidelink SRBs, etc. In some aspects, RLC channel configurations may include RLC entity configurations, MAC logical channel configurations, PHY layer configurations, etc.

[0136] As pointed out above, Figure 9 This is provided as an example. Other examples may differ from the one provided. Figure 9 The example described.

[0137] Figure 10 This is a schematic diagram illustrating Example 1000 associated with an initial configuration of a Layer 2 relay according to the present disclosure. In some aspects, Example 1000 can be considered as described above in conjunction with... Figure 7 The description is part of establishing a Layer 2 trunk connection from a Layer 2 lightweight UE to a network trunk and / or as combined with the above. Figure 8 This is described as part of establishing a Layer 2 trunk connection from a Layer 2 UE to a network trunk. For example... Figure 10 As shown, Example 1000 may include remote UEs (e.g., UE 120e, remote UE 305, remote UE 405, remote UE 505, remote UE 605, etc.). Figure 7 (and / or 8 described in the text, such as remote UEs, etc.), relay UEs (e.g., UE 120a, relay UE 310, relay UE 410, relay UE 510, relay UE 610, etc., as described above). Figure 7 (and / or the relay UE described in 8, etc.) and NG-RAN (e.g., base station 110, NG-RAN 340, NG-RAN 440, NG-RAN 540, NG-RAN 640, combined with the above). Figure 7 Communication between (and / or NG-RAN, etc. as described in 8).

[0138] As in Figure 10 As shown by reference numeral 1005 in the attached figure, a relay UE can be configured with a Layer 2 relay initial configuration. For example, NG-RAN (in combination with 5GC) can be configured in conjunction with the above. Figure 9 The similar approach described provides Layer 2 relay configuration.

[0139] As in Figure 10 As further illustrated by reference numeral 1010 in the accompanying drawings, the remote UE and the relay UE can perform Layer 2 relay discovery. For example, the remote UE and the relay UE can perform [actions related to...]. Figure 5 , 6One or more of the operations described in section 7. Therefore, a remote UE can identify a relay UE as a potential relay UE for Layer 2 relay services, Layer 2 light relay services, etc. In some aspects, a remote UE can perform Layer 2 relay discovery at least in part based on an application associated with a specific service initiation. For example, a remote UE can determine whether to request Layer 2 relay services or Layer 2 light relay services based at least in part on an application initiation, and can perform Layer 2 relay discovery accordingly to identify relay UEs capable of providing Layer 2 relay services or Layer 2 light relay services.

[0140] As in Figure 10 As further shown by reference numeral 1015 in the accompanying drawings, a remote UE can provide a direct communication request to a relay UE. In some aspects, the direct communication request may include a Layer 2 relay request, which may also be referred to as a request to establish a Layer 2 relay service. In some aspects, the direct communication request may include a Layer 2 light relay request, which may also be referred to as a request to establish a Layer 2 light relay service. In some aspects, the direct communication request may include a relay service code. The relay service code may identify the relay type of a Layer 2 relay service or a Layer 2 light relay service. For example, the relay service code may identify a Layer 2 relay service or a Layer 2 light relay service as an emergency service, a gaming service, a low-latency service, or another type of service. In some aspects, it may be included in another message (such as...) Figure 10 The Layer 2 Relay Request (or Layer 2 Light Relay Request) and / or Relay Service Code are provided in the Direct Security Mode Completion Message shown.

[0141] As indicated by reference numeral 1020, a relay UE can provide a remote UE with information indicating whether the relay UE accepts or rejects a Layer 2 relay service or a Layer 2 lightweight relay service. For example, the relay UE can determine whether to accept or reject the Layer 2 relay service or Layer 2 lightweight relay service based at least in part on a relay service code associated with the Layer 2 relay service or Layer 2 lightweight relay service. The relay UE can provide information indicating whether to accept or reject the Layer 2 relay service or Layer 2 lightweight relay service in a direct communication accept message (indicating that the relay UE accepts the Layer 2 relay service or Layer 2 lightweight relay service) or a direct communication reject message (indicating that the relay UE rejects the Layer 2 relay service or Layer 2 lightweight relay service). In some aspects, the direct communication reject message can indicate that the relay UE rejects the Layer 2 relay service or Layer 2 lightweight relay service based at least in part on a cause value. For example, the cause value can indicate that a specified Layer 2 relay service or Layer 2 lightweight relay service cannot be supported or is not supported. In some aspects, the relay UE may provide information indicating whether the relay UE accepts or rejects Layer 2 relay service or Layer 2 lightweight relay service after the exchange of direct security mode command messages and / or direct security mode completion messages between the relay UE and the remote UE (e.g., after the establishment of security of the unicast link is completed).

[0142] like Figure 10 As further shown, the PC5-S direct communication accept message sent to indicate the successful establishment of a PC5 unicast link may include at least a portion of the Layer 2 relay initial configuration. For non-Uu link establishment, a portion of the Layer 2 relay initial configuration may be sent in the non-Uu-specific link accept message. A portion of the Layer 2 relay initial configuration provided by the relay UE to the remote UE may include a sidelink (or another type of non-Uu link) RLC channel configuration for relaying SRB services between the remote UE and the NG-RAN. The sidelink RLC channel configuration for relaying SRB services (e.g., SRB0 services) may differ from the access link RLC channel configuration for SRB services between the relay UE and the NG-RAN. RLC access management may also be used. In some aspects, the relay UE may send at least a portion of the Layer 2 relay initial configuration to the remote UE based at least in part on receiving a direct communication request from the remote UE.

[0143] Additionally and / or alternatively, and as indicated by reference numeral 1025, the relay UE may send at least a portion of the Layer 2 relay initial configuration in an RRC reconfiguration message (such as an RRC reconfiguration sidelink message (e.g., a PC5-RRC message)). In these examples, the relay UE may utilize the Layer 2 relay initial configuration to reconfigure the remote UE. Thus, the relay UE may configure a PC5 unicast link (or another type of non-Uu unicast link) with one or more SRBs to be used by the remote UE for Layer 2 relay services. As indicated by reference numeral 1030, the remote UE may send an RRC reconfiguration complete sidelink message to the relay UE to indicate that the RRC reconfiguration was successfully completed.

[0144] As in Figure 10 As further illustrated by reference numeral 1035, a remote UE can initiate an RRC connection establishment with the NG-RAN via a relay UE, at least in part, based on a Layer 2 relay initial configuration. For example, a remote UE can send an SRB (e.g., SRB0) RRC establishment request to the relay UE, at least in part, based on the sidelink RLC channel configuration included in the Layer 2 relay initial configuration.

[0145] A relay UE can receive an SRB RRC establishment request from a remote UE and can relay the SRB RRC establishment request to the NG-RAN and / or one or more 5GC components, at least in part, based on the Layer 2 relay initial configuration. For example, the relay UE can receive the SRB RRC establishment request on a non-Uu link between the relay UE and the remote UE, at least in part, based on the sidelink or PC5 RLC channel configuration in the Layer 2 relay initial configuration. As another example, the relay UE can perform multiplexing of SRB RRC establishment requests with SRB services of multiple UEs on the access link or Uu link between the relay UE and the NG-RAN, at least in part, based on the adaptation configuration of the SRB mapping between the Uu RLC channel for the access link or the non-Uu RLC channel of the access link and the non-Uu link between the relay UE and the remote UE, on the Layer 2 relay initial configuration. As another example, the relay UE can send the SRB RRC establishment request to the NG-RAN, at least in part, based on the access link or Uu RLC channel configuration in the Layer 2 relay initial configuration.

[0146] As another example, a relay UE can receive RRC establishment messages from NG-RAN and / or one or more 5GC components, and can relay RRC establishment messages to a remote UE at least partially based on a Layer 2 relay initial configuration. For example, the relay UE can receive RRC establishment messages from NG-RAN at least partially based on the access link or Uu RLC channel configuration in the Layer 2 relay initial configuration. As another example, the relay UE can send RRC establishment messages to a remote UE on a non-Uu link between the relay UE and the remote UE at least partially based on the sidelink or PC5 RLC channel configuration in the Layer 2 relay initial configuration.

[0147] As pointed out above, Figure 10 This is provided as an example. Other examples may differ from the one provided. Figure 10 The example described.

[0148] Figure 11 This is a schematic diagram illustrating an example process 1100 performed, for example, by a relay UE according to this disclosure. Example process 1100 is wherein a relay UE (e.g., UE 120a, relay UE 310, relay UE 410, relay UE 510, relay UE 610, etc., as described above) is involved. Figure 7-10 Examples of operations performed by a relay UE (shown and described) associated with the initial configuration of a Layer 2 relay are shown and described.

[0149] like Figure 11As shown, in some aspects, process 1100 may include initiating a connection with a network entity (block 1110). For example, a relay UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, memory 282, initiation component 1510, etc.) may initiate a connection with a network entity as described above.

[0150] like Figure 11 As further shown, in some aspects, process 1100 may include receiving the initial configuration of the Layer 2 relay at least in part based on the initiated connection (block 1120). For example, the UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receiver processor 258, controller / processor 280, memory 282, receiver component 1502, etc.) may receive the initial configuration of the Layer 2 relay at least in part based on the initiated connection, as described above.

[0151] Process 1100 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other processes described elsewhere herein.

[0152] In the first aspect, initiating a connection with a network entity includes at least one of the following: performing successful authentication and security establishment with the network entity during NAS registration and service request procedures, or performing successful AS security establishment with the network entity during RRC connection establishment procedures. In the second aspect, alone or in combination with the first aspect, receiving the initial Layer 2 relay configuration includes: receiving the initial Layer 2 relay configuration in an RRC reconfiguration message from the network entity. In the third aspect, alone or in combination with one or more aspects of the first and second aspects, the initial Layer 2 relay configuration includes at least one of the following: access link RLC channel configuration for remote UE access link SRB service relay, SRB adaptation configuration for mapping access link RLC channels and sidelink RLC channels, or sidelink RLC channel configuration for remote UE sidelink SRB service relay. In the fourth aspect, alone or in combination with one or more aspects of the first to third aspects, the RLC channel configuration includes at least one of the following: RLC entity configuration, MAC logical channel configuration, or PHY layer configuration.

[0153] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 1100 includes: receiving a request from a remote UE to establish a Layer 2 relay service; and sending a Layer 2 relay initial configuration to the remote UE, at least in part based on the receipt of the request. In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, sending the Layer 2 relay initial configuration to the remote UE includes: sending the Layer 2 relay initial configuration to the remote UE in a PC5-S message, the PC5-S message indicating that the establishment of a PC5 unicast link between the remote UE and the relay UE is successful.

[0154] In the seventh aspect, sending the Layer 2 relay initial configuration to the remote UE, either alone or in combination with one or more of the first to sixth aspects, includes sending the Layer 2 relay initial configuration to the remote UE in a PC5-RRC message. In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the Layer 2 relay initial configuration includes a sidelink RLC channel configuration for relaying SRB0 services between the remote UE and the base station.

[0155] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, process 1100 includes: receiving an SRB0 RRC establishment request from a remote UE; and relaying the SRB0 RRC establishment request to a network entity, at least in part based on a Layer 2 relay initial configuration. In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, process 1100 includes: receiving an RRC establishment message from a network entity; and relaying the RRC establishment message to a remote UE, at least in part based on a Layer 2 relay initial configuration.

[0156] Although Figure 11 An example box of process 1100 is shown, but in some aspects, process 1100 may include... Figure 11 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 1100 may be executed in parallel.

[0157] Figure 12 This is a schematic diagram illustrating an example process 1200 performed by a network entity, for example, according to this disclosure. Example process 1200 is wherein a network entity (e.g., base station 110, NG-RAN 340, NG-RAN 440, NG-RAN 540, NG-RAN 640, etc., as described above) is involved. Figure 7-10 Examples of operations performed by NG-RAN (e.g.) associated with the initial configuration of a Layer 2 relay are shown and described.

[0158] like Figure 12As shown, in some aspects, process 1200 may include receiving an indication that the UE has the capability to operate as a Layer 2 relay UE (block 1210). For example, a network entity (e.g., using antenna 234, demodulator 232, MIMO detector 236, receiver processor 238, controller / processor 240, memory 242, scheduler 246, receiver component 1802, etc.) may receive an indication that the UE has the capability to operate as a Layer 2 relay UE, as described above.

[0159] like Figure 12 As further shown, in some aspects, process 1200 may include: sending a Layer 2 relay initial configuration to the UE at least in part based on receiving the instruction (block 1220). For example, network entities (e.g., using transmit processor 220, TX MIMO processor 230, modulator 232, antenna 234, controller / processor 240, memory 242, scheduler 246, transmit component 1806, etc.) may send the Layer 2 relay initial configuration to the UE at least in part based on receiving the instruction, as described above.

[0160] Process 1200 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other processes described elsewhere herein.

[0161] In the first aspect, receiving an indication includes receiving an indication from another network entity based on successful UE authentication and security establishment. In the second aspect, alone or in combination with the first aspect, receiving an indication includes receiving an indication in an N2 message during a NAS registration and service request process. In the third aspect, alone or in combination with one or more of the first and second aspects, sending a Layer 2 relay initial configuration includes sending the Layer 2 relay initial configuration in an RRC reconfiguration message.

[0162] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the initial configuration of the Layer 2 relay includes at least one of the following: access link RLC channel configuration for remote UE access link SRB service relay, SRB adaptation configuration for mapping access link RLC channels and sidelink RLC channels, or sidelink RLC channel configuration for remote UE sidelink SRB service relay. In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the RLC channel configuration includes at least one of the following: RLC entity configuration, MAC logical channel configuration, or PHY layer configuration.

[0163] Although Figure 12 An example box of process 1200 is shown, but in some aspects, process 1200 may include... Figure 12 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 1200 may be executed in parallel.

[0164] Figure 13 This is a schematic diagram illustrating an example process 1300 performed, for example, by a relay UE according to this disclosure. Example process 1300 is wherein a relay UE (e.g., UE 120a, relay UE 310, relay UE 410, relay UE 510, relay UE 610, etc., as described above) is involved. Figure 7-10 Examples of operations performed by a relay UE (shown and described) associated with the initial configuration of a Layer 2 relay are shown and described.

[0165] like Figure 13 As shown, in some aspects, process 1300 may include receiving a request to establish a Layer 2 relay service from a remote UE (block 1310). For example, a relay UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receiver processor 258, controller / processor 280, memory 282, receiver component 1502, etc.) may receive a request to establish a Layer 2 relay service from a remote UE, as described above.

[0166] like Figure 13 As further shown, in some aspects, process 1300 may include: sending a Layer 2 relay initial configuration to a remote UE at least in part based on a received request (block 1320). For example, a relay UE (e.g., using antenna 252, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, memory 282, transmit component 1506, etc.) may send a Layer 2 relay initial configuration to a remote UE at least in part based on a received request, as described above.

[0167] Process 1300 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other processes described elsewhere herein.

[0168] In the first aspect, sending the Layer 2 relay initial configuration to the remote UE includes sending the Layer 2 relay initial configuration to the remote UE in a PC5-S message, the PC5-S message indicating that the establishment of a PC5 unicast link between the remote UE and the relay UE is successful. In the second aspect, alone or in combination with the first aspect, sending the Layer 2 relay initial configuration to the remote UE includes sending the Layer 2 relay initial configuration to the remote UE in a PC5-RRC message. In the third aspect, alone or in combination with one or more of the first and second aspects, the Layer 2 relay initial configuration includes a sidelink RLC channel configuration for relaying SRB services between the remote UE and the base station.

[0169] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, process 1300 includes: receiving an SRB0 RRC establishment request from a remote UE; and relaying the SRB0 RRC establishment request to a network entity based at least in part on a Layer 2 relay initial configuration. In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 1300 includes: receiving an RRC establishment message from a network entity; and relaying the RRC establishment message to a remote UE based at least in part on a Layer 2 relay initial configuration.

[0170] Although Figure 13 An example box of process 1300 is shown, but in some aspects, process 1300 may include... Figure 13 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 1300 may be executed in parallel.

[0171] Figure 14 This is a schematic diagram illustrating an example process 1400 performed, for example, by a remote UE according to this disclosure. Example process 1400 is wherein a remote UE (e.g., UE 120e, remote UE 305, remote UE 405, remote UE 505, remote UE 605, etc., as described above) is involved. Figure 7-10 Examples shown and described illustrate operations performed by remote UEs (e.g.) in relation to the initial configuration of a Layer 2 relay.

[0172] like Figure 14 As shown, in some aspects, process 1400 may include sending a request to a relay UE to establish a Layer 2 relay service (block 1410). For example, a remote UE (e.g., using antenna 252, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, memory 282, transmit component 2106, etc.) may send a request to a relay UE to establish a Layer 2 relay service, as described above.

[0173] like Figure 14 As further shown, in some aspects, process 1400 may include: relaying initial configuration from the relay UE receiving layer 2 based at least in part on a transmission request (block 1420). For example, a remote UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receiver processor 258, controller / processor 280, memory 282, receiver component 2102, etc.) may relay initial configuration from the relay UE receiving layer 2 based at least in part on a transmission request, as described above.

[0174] Process 1400 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other processes described elsewhere herein.

[0175] In the first aspect, receiving the Layer 2 relay initial configuration from the relay UE includes receiving the Layer 2 relay initial configuration from the relay UE in a PC5-S message, the PC5-S message indicating that the establishment of a PC5 unicast link between the remote UE and the relay UE is successful. In the second aspect, alone or in combination with the first aspect, receiving the Layer 2 relay initial configuration from the relay UE includes receiving the Layer 2 relay initial configuration from the relay UE in a PC5-RRC message. In the third aspect, alone or in combination with one or more aspects of the first and second aspects, the Layer 2 relay initial configuration includes a sidelink RLC channel configuration for relaying SRB services between the remote UE and a network entity. In the fourth aspect, alone or in combination with one or more aspects of the first to third aspects, process 1400 includes initiating an RRC connection via the relay UE to a base station, at least in part based on the Layer 2 relay initial configuration.

[0176] Although Figure 14 An example box of process 1400 is shown, but in some aspects, process 1400 may include... Figure 14 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 1400 may be executed in parallel.

[0177] Figure 15 This is a block diagram of an example apparatus 1500 for wireless communication according to the present disclosure. Apparatus 1500 may be a relay UE, or a relay UE may include apparatus 1500. In some aspects, apparatus 1500 includes a receiving component 1502, a communication manager 1504, and a transmitting component 1506, which can communicate with each other (e.g., via one or more buses). As shown, apparatus 1500 can use the receiving component 1502 and the transmitting component 1506 to communicate with another apparatus 1508 (such as a UE, a base station, or another wireless communication device).

[0178] In some respects, device 1500 can be configured to perform the functions described herein. Figure 7-10 One or more operations described herein. Alternatively or concurrently, the apparatus 1500 may be configured to perform one or more processes described herein, such as... Figure 11 Process 1100 Figure 13 The process 1300 or a combination thereof. In some aspects, the apparatus 1500 may include the above-described combination. Figure 2 One or more components of the described relay UE.

[0179] Receiver 1502 may receive communications from device 1508, such as reference signals, control information, data communications, or combinations thereof. Receiver 1502 may provide the received communications to one or more other components of device 1500, such as communication manager 1504. In some aspects, receiver 1502 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples), and may provide the processed signal to one or more other components. In some aspects, receiver 1502 may include the combinations described above. Figure 2 The described relay UE includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0180] Transmitting component 1506 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 1508. In some aspects, communication manager 1504 can generate communications and send the generated communications to transmitting component 1506 for transmission to device 1508. In some aspects, transmitting component 1506 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated communications and can send the processed signals to device 1508. In some aspects, transmitting component 1506 can include the above-described combinations. Figure 2 The described relay UE includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, transmit component 1506 may be co-located with receive component 1502 in a transceiver.

[0181] In some aspects, the communication manager 1504 can initiate a connection with the device 1508. In some aspects, the communication manager 1504 can receive (or cause the receiving component 1502 to receive) a Layer 2 relay initial configuration from the device 1508 based at least in part on initiating a connection. In some aspects, the communication manager 1504 can receive (or cause the receiving component 1502 to receive) a request to establish a Layer 2 relay service from the device 1508. In some aspects, the communication manager 1504 can send (or cause the sending component 1506 to send) a Layer 2 relay initial configuration to the device 1508 based at least in part on receiving the request. In some aspects, the communication manager 1504 can include the above-described combinations... Figure 2 The controller / processor, memory, or combination thereof of the described relay UE.

[0182] In some aspects, the communication manager 1504 may include a collection of components, such as the initiating component 1510. Alternatively, this collection of components may be separate from and distinct from the communication manager 1504. In some aspects, one or more components in the collection may include those described above. Figure 2 The described relay UE's controller / processor, memory, or a combination thereof may be implemented therein. Alternatively, one or more components in this set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the component's function or operation. Initiating component 1510 may initiate a connection to device 1508.

[0183] Figure 15 The number and arrangement of components shown are provided as an example. In reality, they can exist in combination with... Figure 15 The components shown are compared to additional components, fewer components, different components, or components arranged in a different way. Furthermore, Figure 15 The two or more components shown can be implemented within a single component, or Figure 15 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 15 The set (one or more) components shown can perform actions described by Figure 15 The other set of components shown performs one or more functions.

[0184] Figure 16 This is a schematic diagram illustrating an example 1600 of a hardware implementation of a device 1605 employing a processing system 1610 according to the present disclosure. Device 1605 may be a relay UE.

[0185] Processing system 1610 can be implemented using a bus architecture typically represented by bus 1615. Bus 1615 may include any number of interconnect buses and bridges, depending on the specific application of processing system 1610 and overall design constraints. Bus 1615 links various circuits together, including one or more processors and / or hardware components represented by processor 1620, the illustrated components, and computer-readable medium / memory 1625. Bus 1615 may also link various other circuits such as timing sources, peripheral devices, voltage regulators, power management circuitry, etc.

[0186] Processing system 1610 may be coupled to transceiver 1630. Transceiver 1630 is coupled to one or more antennas 1635. Transceiver 1630 provides a means for communicating with various other devices over a transmission medium. Transceiver 1630 receives signals from one or more antennas 1635, extracts information from the received signals, and provides the extracted information to processing system 1610 (specifically, receiving component 1502). Furthermore, transceiver 1630 receives information from processing system 1610 (specifically, transmitting component 1506) and generates signals to be applied to one or more antennas 1635, at least in part, based on the received information.

[0187] Processing system 1610 includes a processor 1620 coupled to a computer-readable medium / memory 1625. Processor 1620 is responsible for general-purpose processing, including executing software stored on the computer-readable medium / memory 1625. When executed by processor 1620, the software causes processing system 1610 to perform the various functions described herein with respect to any particular device. Computer-readable medium / memory 1625 may also be used to store data manipulated by processor 1620 during software execution. Processing system also includes at least one of the components shown. A component may be a software module residing / stored in computer-readable medium / memory 1625 and running in processor 1620, one or more hardware modules coupled to processor 1620, or some combination thereof.

[0188] In some aspects, the processing system 1610 may be a component of relay UE 120a and may include at least one of TX MIMO processor 266, receive (RX) processor 258 and / or controller / processor 280 and / or memory 282. In some aspects, the apparatus 1605 for wireless communication includes: a unit for initiating a connection with a network entity; a unit for receiving a Layer 2 relay initial configuration at least in part based on the initiation of the connection; and so on. In some aspects, the apparatus 1605 for wireless communication may include: a unit for receiving a request from a remote UE to establish Layer 2 relay service; a unit for sending a Layer 2 relay initial configuration to the remote UE at least in part based on the receipt of the request; and so on. The aforementioned units may be one or more of the aforementioned components of the processing system 1610 configured to perform the functions described by the aforementioned units, in the apparatus 1500 and / or the apparatus 1605. As described elsewhere herein, the processing system 1610 may include TX MIMO processor 266, RX processor 258 and / or controller / processor 280. In one configuration, the aforementioned units may be a TX MIMO processor 266, an RX processor 258, and / or a controller / processor 280 configured to perform the functions and / or operations described herein.

[0189] Figure 16 This is provided as an example. Other examples can be combined with it. Figure 16 The examples described are different.

[0190] Figure 17 This is a schematic diagram illustrating an example 1700 of the code and circuitry implementation for device 1705 according to this disclosure. Device 1705 may be a relay UE.

[0191] like Figure 17 As shown, device 1705 may include circuitry (circuit 1720) for initiating a connection. For example, circuitry 1720 may provide a unit for initiating a connection with a network entity.

[0192] like Figure 17 As shown, device 1705 may include circuitry (circuit 1725) for receiving initial configuration of a Layer 2 relay. For example, circuitry 1725 may provide a unit for receiving initial configuration of a Layer 2 relay, at least in part, based on initiating a connection.

[0193] like Figure 17 As shown, apparatus 1705 may include circuitry (circuit 1730) for receiving requests. For example, circuitry 1730 may provide a unit for receiving a request from a remote UE to establish Layer 2 relay services.

[0194] like Figure 17As shown, apparatus 1705 may include circuitry (circuit 1735) for transmitting initial configuration of a Layer 2 relay. For example, circuit 1735 may provide a unit for transmitting initial configuration of a Layer 2 relay to a remote UE, at least in part, based on a received request.

[0195] Circuits 1720, 1725, 1730 and / or 1735 may include the above-described combination. Figure 2 One or more components of the described relay UE 120a, such as communication manager 140, transmit processor 264, TX MIMO processor 266, MOD 254, DEMOD 254, MIMO detector 256, receive processor 258, antenna 252, controller / processor 280 and / or memory 282.

[0196] like Figure 17 As shown, device 1705 may include code (code 1740) stored in computer-readable medium 1625 for initiating a connection. For example, when executed by processor 1620, code 1740 may cause device 1705 to initiate a connection with a network entity.

[0197] like Figure 17 As shown, device 1705 may include code (code 1745) stored in computer-readable medium 1625 for receiving Layer 2 relay initial configuration. For example, when executed by processor 1620, code 1745 may cause device 1705 to receive Layer 2 relay initial configuration at least in part based on initiating a connection.

[0198] like Figure 17 As shown, device 1705 may include code (code 1750) stored in computer-readable medium 1625 for receiving a request. For example, when executed by processor 1620, code 1750 may cause device 1705 to receive a request from a remote UE to establish Layer 2 relay services.

[0199] like Figure 17 As shown, device 1705 may include code (code 1755) stored in computer-readable medium 1625 for transmitting layer 2 relay initial configuration. For example, when executed by processor 1620, code 1755 may cause device 1705 to transmit layer 2 relay initial configuration to a remote UE at least in part based on a received request.

[0200] Figure 17 This is provided as an example. Other examples can be combined with it. Figure 17 The examples described are different.

[0201] Figure 18This is a block diagram of an example apparatus 1800 for wireless communication according to the present disclosure. Apparatus 1800 may be a base station, or a base station may include apparatus 1800. In some aspects, apparatus 1800 includes a receiving component 1802, a communication manager 1804, and a transmitting component 1806, which can communicate with each other (e.g., via one or more buses). As shown, apparatus 1800 can use the receiving component 1802 and the transmitting component 1806 to communicate with another apparatus 1808 (such as a UE, a base station, or another wireless communication device).

[0202] In some respects, device 1800 can be configured to perform the functions described herein. Figure 7-10 One or more operations described herein. Alternatively or concurrently, the apparatus 1800 may be configured to perform one or more processes described herein, such as... Figure 12 The process 1200. In some aspects, the apparatus 1800 may include the above-described combination. Figure 2 One or more components of the base station described.

[0203] Receiver 1802 may receive communications from device 1808, such as reference signals, control information, data communications, or combinations thereof. Receiver 1802 may provide the received communications to one or more other components of device 1800, such as communication manager 1804. In some aspects, receiver 1802 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples), and may provide the processed signal to one or more other components. In some aspects, receiver 1802 may include the combinations described above. Figure 2 The described base station includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0204] Transmitting component 1806 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 1808. In some aspects, communication manager 1804 can generate communications and send the generated communications to transmitting component 1806 for transmission to device 1808. In some aspects, transmitting component 1806 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated communications and can send the processed signals to device 1808. In some aspects, transmitting component 1806 can include the combinations described above. Figure 2The described base station includes one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof. In some aspects, the transmit component 1806 may be co-located with the receive component 1802 in a transceiver.

[0205] The communication manager 1804 may receive (or may cause the receiving component 1802 to receive) an indication that the device 1808 has the capability to operate as a Layer 2 relay UE. The communication manager 1804 may, at least in part, send (or may cause the transmitting component 1806 to send) a Layer 2 relay initial configuration to the device 1808 based on the received indication. In some aspects, the communication manager 1804 may include the above-described combination of... Figure 2 The described base station's controller / processor, memory, scheduler, communication unit, or a combination thereof.

[0206] In some aspects, the communication manager 1804 may include a collection of components. Alternatively, this collection of components may be separate from and distinct from the communication manager 1804. In some aspects, one or more components in the collection may include those described above. Figure 2 The described base station's controller / processor, memory, scheduler, communication unit, or a combination thereof, or may be implemented therein. Alternatively, one or more components of this set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the component's function or operation.

[0207] Figure 18 The number and arrangement of components shown are provided as an example. In reality, they can exist in combination with... Figure 18 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 18 The two or more components shown can be implemented within a single component, or Figure 18 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 18 The set (one or more) components shown can perform actions described by Figure 18 The other set of components shown performs one or more functions.

[0208] Figure 19 This is a schematic diagram illustrating an example 1900 of a hardware implementation of an apparatus 1905 employing a processing system 1910 according to the present disclosure. Apparatus 1905 may be a base station.

[0209] Processing system 1910 can be implemented using a bus architecture typically represented by bus 1915. Bus 1915 may include any number of interconnect buses and bridges, depending on the specific application of processing system 1910 and overall design constraints. Bus 1915 links various circuits together, including one or more processors and / or hardware components represented by processor 1920, the illustrated components, and computer-readable medium / memory 1925. Bus 1915 may also link various other circuits such as timing sources, peripheral devices, voltage regulators, power management circuits, etc.

[0210] Processing system 1910 may be coupled to transceiver 1930. Transceiver 1930 is coupled to one or more antennas 1935. Transceiver 1930 provides a means for communicating with various other devices over a transmission medium. Transceiver 1930 receives signals from one or more antennas 1935, extracts information from the received signals, and provides the extracted information to processing system 1910 (specifically, receiving component 1802). Furthermore, transceiver 1930 receives information from processing system 1910 (specifically, transmitting component 1806) and generates signals to be applied to one or more antennas 1935, at least in part, based on the received information.

[0211] Processing system 1910 includes a processor 1920 coupled to a computer-readable medium / memory 1925. Processor 1920 is responsible for general-purpose processing, including executing software stored on the computer-readable medium / memory 1925. When executed by processor 1920, the software causes processing system 1910 to perform the various functions described herein with respect to any particular device. Computer-readable medium / memory 1925 may also be used to store data manipulated by processor 1920 during software execution. Processing system also includes at least one of the components shown. A component may be a software module residing / stored in computer-readable medium / memory 1925 and running in processor 1920, one or more hardware modules coupled to processor 1920, or some combination thereof.

[0212] In some aspects, the processing system 1910 may be a component of the base station 110 and may include at least one of the TX MIMO processor 230, the RX processor 238, and / or the controller / processor 240 and / or the memory 242. In some aspects, the apparatus 1905 for wireless communication includes: a unit for receiving an indication that the UE has the capability to operate as a Layer 2 relay UE; a unit for transmitting a Layer 2 relay initial configuration to the UE based at least in part on the received indication; and so on. The aforementioned units may be one or more of the aforementioned components of the processing system 1910 of apparatus 1800 and / or apparatus 1905 configured to perform the functions described herein. As described elsewhere herein, the processing system 1910 may include the TX MIMO processor 230, the receiver processor 238, and / or the controller / processor 240. In one configuration, the aforementioned units may be the TX MIMO processor 230, the receiver processor 238, and / or the controller / processor 240 configured to perform the functions and / or operations described herein.

[0213] Figure 19 This is provided as an example. Other examples can be combined with it. Figure 19 The examples described are different.

[0214] Figure 20 This is a schematic diagram illustrating an example 2000 of the implementation of code and circuitry for apparatus 2005 according to the present disclosure. Apparatus 2005 may be a base station.

[0215] like Figure 20 As shown, apparatus 2005 may include circuitry (circuit 2020) for receiving an indication. For example, circuit 2020 may provide a unit for receiving an indication that the UE has the capability to operate as a Layer 2 relay UE.

[0216] like Figure 20 As shown, apparatus 2005 may include circuitry (circuit 2025) for transmitting initial configuration of a Layer 2 relay. For example, circuit 2025 may provide a unit for transmitting the initial configuration of a Layer 2 relay to the UE, at least in part, based on a received indication.

[0217] Circuit 2020 and / or 2025 may include the above-mentioned combination. Figure 2 One or more components of the described relay UE 120a, such as a communication manager 150, a transmit processor 220, a TX MIMO processor 230, a MOD 232, a DEMOD 232, a MIMO detector 236, a receive processor 238, an antenna 234, a controller / processor 240, and / or a memory 242.

[0218] like Figure 20As shown, device 2005 may include code (code 2040) stored in computer-readable medium 1925 for receiving instructions. For example, when executed by processor 1920, code 2040 may cause device 2005 to receive instructions regarding the UE's ability to operate as a Layer 2 relay UE.

[0219] like Figure 20 As shown, apparatus 2005 may include code (code 2045) stored in computer-readable medium 1925 for transmitting layer 2 relay initial configuration. For example, when executed by processor 1920, code 2045 may cause apparatus 2005 to transmit layer 2 relay initial configuration to UE at least in part based on received indication.

[0220] Figure 20 This is provided as an example. Other examples can be combined with it. Figure 20 The examples described are different.

[0221] Figure 21 This is a block diagram of an example device 2100 for wireless communication according to the present disclosure. Device 2100 may be a remote UE (e.g., UE 120e, remote UE 305, remote UE 405, remote UE 505, remote UE 605, etc., as described above). Figure 7-10 The described remote UE, etc., may include device 2100. In some aspects, device 2100 includes a receiving component 2102, a communication manager 2104, and a transmitting component 2106, which can communicate with each other (e.g., via one or more buses). As shown, device 2100 can use the receiving component 2102 and the transmitting component 2106 to communicate with another device 2108 (such as a UE (e.g., a relay UE), a base station, or another wireless communication device).

[0222] In some respects, device 2100 can be configured to perform the functions described herein. Figure 7-10 One or more operations described herein. Alternatively or concurrently, device 2100 may be configured to perform one or more processes described herein, such as Figure 14 The process 1400 or a combination thereof. In some aspects, the device 2100 may include the above-described combination. Figure 2 One or more components of the remote UE (e.g., UE120e) described.

[0223] Receiver 2102 may receive communications from device 2108, such as reference signals, control information, data communications, or combinations thereof. Receiver 2102 may provide the received communications to one or more other components of device 2100, such as communication manager 2104. In some aspects, receiver 2102 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples), and may provide the processed signal to one or more other components. In some aspects, receiver 2102 may include the combinations described above. Figure 2 The remote UE described includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0224] Transmitting component 2106 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 2108. In some aspects, communication manager 2104 can generate communications and send the generated communications to transmitting component 2106 for transmission to device 2108. In some aspects, transmitting component 2106 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated communications and can send the processed signals to device 2108. In some aspects, transmitting component 2106 can include the above-described combinations. Figure 2 The described remote UE includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, transmit component 2106 may be co-located with receive component 2102 in a transceiver.

[0225] The communication manager 2104 can send (or cause the sending component 2106 to send) a request to establish a Layer 2 relay service to the device 2108. The communication manager 2104 can receive (or cause the receiving component 2102 to receive) the initial Layer 2 relay configuration from the device 2108 based at least in part on the sending request. In some aspects, the communication manager 2104 may include the above-described... Figure 2 The controller / processor, memory, or combination thereof of the remote UE (e.g., UE 120e) described.

[0226] In some aspects, the communication manager 2104 may include a collection of components. Alternatively, the collection of components may be separate from and distinct from the communication manager 2104. In some aspects, one or more components in the collection may include those described above. Figure 2The controller / processor, memory, or a combination thereof of the described remote UE (e.g., UE 120e) may be implemented therein. Alternatively, one or more components in this set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion thereof) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0227] Figure 21 The number and arrangement of components shown are provided as an example. In reality, they can exist in combination with... Figure 21 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 21 The two or more components shown can be implemented within a single component, or Figure 21 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 21 The set (one or more) components shown can perform actions described by Figure 21 The other set of components shown performs one or more functions.

[0228] Figure 22 This is a schematic diagram illustrating an example 2200 of a hardware implementation of a device 2205 employing a processing system 2210 according to the present disclosure. Device 2205 may be a remote UE (e.g., UE120e, remote UE 305, remote UE 405, remote UE 505, remote UE 605, etc., as described above). Figure 7-10 (Description of remote UE, etc.).

[0229] Processing system 2210 can be implemented using a bus architecture typically represented by bus 2215. Bus 2215 may include any number of interconnect buses and bridges, depending on the specific application of processing system 2210 and overall design constraints. Bus 2215 links various circuits together, including one or more processors and / or hardware components represented by processor 2220, the illustrated components, and computer-readable medium / memory 2225. Bus 2215 may also link various other circuits such as timing sources, peripheral devices, voltage regulators, power management circuitry, etc.

[0230] Processing system 2210 may be coupled to transceiver 2230. Transceiver 2230 is coupled to one or more antennas 2235. Transceiver 2230 provides a means for communicating with various other devices over a transmission medium. Transceiver 2230 receives signals from one or more antennas 2235, extracts information from the received signals, and provides the extracted information to processing system 2210 (specifically, receiving component 2102). Furthermore, transceiver 2230 receives information from processing system 2210 (specifically, transmitting component 2106) and generates signals to be applied to one or more antennas 2235, at least in part, based on the received information.

[0231] Processing system 2210 includes a processor 2220 coupled to a computer-readable medium / memory 2225. Processor 2220 is responsible for general-purpose processing, including executing software stored on the computer-readable medium / memory 2225. When executed by processor 2220, the software causes processing system 2210 to perform the various functions described herein with respect to any particular device. Computer-readable medium / memory 2225 may also be used to store data manipulated by processor 2220 during software execution. Processing system also includes at least one of the components shown. A component may be a software module residing / stored in computer-readable medium / memory 2225 and running in processor 2220, one or more hardware modules coupled to processor 2220, or some combination thereof.

[0232] In some aspects, processing system 2210 may be a component of UE 120 and may include at least one of TX MIMO processor 266, RX processor 258, and / or controller / processor 280 and / or memory 282. In some aspects, apparatus 2205 for wireless communication includes: a unit for sending a request to a relay UE to establish Layer 2 relay service; a unit for receiving Layer 2 relay initial configuration from the relay UE based at least in part on sending the request; and so on. The aforementioned units may be one or more of the aforementioned components of processing system 2210 configured to perform the functions described herein. As described elsewhere herein, processing system 2210 may include TX MIMO processor 266, RX processor 258, and / or controller / processor 280. In one configuration, the aforementioned units may be TX MIMO processor 266, RX processor 258, and / or controller / processor 280 configured to perform the functions and / or operations described herein.

[0233] Figure 22 This is provided as an example. Other examples can be combined with it. Figure 22 The examples described are different.

[0234] Figure 23 This is a schematic diagram illustrating an example 2300 of the code and circuitry implementation for device 2305 according to this disclosure. Device 2305 may be a relay UE.

[0235] like Figure 23 As shown, apparatus 2305 may include circuitry (circuit 2320) for sending a request. For example, circuitry 2320 may provide a unit for sending a request to a relay UE to establish Layer 2 relay service.

[0236] like Figure 23 As shown, device 2305 may include circuitry (circuit 2325) for receiving initial configuration of a Layer 2 relay. For example, circuitry 2325 may provide a unit for receiving initial configuration of a Layer 2 relay, at least in part, based on initiating a connection.

[0237] Circuits 2320 and / or 2325 may include the above-described combination. Figure 2 One or more components of the described relay UE 120a, such as a communication manager 140, a transmit processor 264, a TX MIMO processor 266, a MOD 254, a DEMOD 254, a MIMO detector 256, a receive processor 258, an antenna 252, a controller / processor 280, and / or a memory 282.

[0238] like Figure 23 As shown, device 2305 may include code (code 2340) stored in computer-readable medium 2225 for sending a request. For example, when executed by processor 2220, code 2340 may cause device 2305 to send a request to the relay UE to establish Layer 2 relay service.

[0239] like Figure 23 As shown, device 2305 may include code (code 2345) stored in computer-readable medium 2225 for receiving layer 2 relay initial configuration. For example, when executed by processor 2220, code 2345 may cause device 2305 to receive layer 2 relay initial configuration from relay UE at least in part based on a transmission request.

[0240] Figure 23 This is provided as an example. Other examples can be combined with it. Figure 23 The examples described are different.

[0241] Figure 24This is a schematic diagram illustrating an example process 2400 performed, for example, by a network entity according to this disclosure. Example process 2400 is a network entity (e.g., base station 110, NG-RAN 340, NG-RAN 440, NG-RAN 540, NG-RAN 650, etc., as described above). Figure 7-10 Examples shown and described are of NG-RAN, network controller 130 (e.g., SMF, AMF, UPF, etc.) performing operations associated with UE capability signaling.

[0242] like Figure 24 As shown, in some aspects, process 24 may include performing a network connection establishment procedure for the UE (block 2410). For example, network entities (e.g., using antenna 234, demodulator 232, MIMO detector 236, receiver processor 238, controller / processor 240, memory 242, scheduler 246, controller / processor 290, memory 292, communication unit 294, receiver component 2502, communication manager 2504, transmitter component 2506, network connection component 2510, etc.) may perform the network connection establishment procedure for the UE as described herein.

[0243] like Figure 24 As further shown, in some aspects, process 2400 may include: transmitting an indication during the network connection establishment process regarding the UE's ability to operate as a Layer 2 relay UE (block 2420). For example, network entities (e.g., using antenna 234, demodulator 232, MIMO detector 236, receiver processor 238, controller / processor 240, memory 242, scheduler 246, controller / processor 290, memory 292, communication unit 294, receiver component 2502, communication manager 2504, transmitter component 2506, network connection component 2510, etc.) may transmit an indication during the network connection establishment process regarding the UE's ability to operate as a Layer 2 relay UE, as described above.

[0244] Process 2400 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other process descriptions elsewhere described herein.

[0245] In the first aspect, performing the network connection establishment process includes performing a registration process for the UE. In the second aspect, either alone or in combination with the first aspect, performing the network connection establishment process includes performing a service request process for the UE. In the third aspect, either alone or in combination with one or more of the first and second aspects, the UE is configured to relay SRB0 services.

[0246] In the fourth aspect, process 2400 includes: sending an indication of the UE context associated with the UE during the network connection establishment process. In the fifth aspect, sending an indication regarding the UE's ability to operate as a Layer 2 relay UE, either alone or in combination with one or more of the first to fourth aspects, includes: sending an indication of Layer 2 relay authorization for the UE. In the sixth aspect, sending an indication regarding the UE's ability to operate as a Layer 2 relay UE, either alone or in combination with one or more of the first to fifth aspects, includes: sending an indication regarding the UE's ability to operate as a Layer 2 relay UE in an N2 message.

[0247] Although Figure 24 An example box of process 2400 is shown, but in some aspects, process 2400 may include... Figure 24 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 2400 may be executed in parallel.

[0248] Figure 25 This is a block diagram of an example device 2500 for wireless communication according to the present disclosure. Device 2500 may be a network entity (e.g., network controller 130, SMF, UPF, AMF, etc.), or a network entity may include device 2500. In some aspects, device 2500 includes a receiving component 2502, a communication manager 2504, and a transmitting component 2506, which can communicate with each other (e.g., via one or more buses). As shown, device 2500 can use the receiving component 2502 and the transmitting component 2506 to communicate with another device 2508 (such as a UE, base station, or another wireless communication device).

[0249] In some respects, device 2500 can be configured to perform the functions described herein. Figure 7-10 One or more operations described herein. Alternatively or concurrently, the apparatus 2500 may be configured to perform one or more processes described herein, such as... Figure 24 The process 2400. In some aspects, the apparatus 2500 may include the above-described combination. Figure 2 One or more components of the network controller 130 described.

[0250] Receiver 2502 may receive communications from device 2508, such as reference signals, control information, data communications, or combinations thereof. Receiver 2502 may provide the received communications to one or more other components of device 2500, such as communication manager 2504. In some aspects, receiver 2502 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples), and may provide the processed signal to one or more other components. In some aspects, receiver 2502 may include the combinations described above. Figure 2 The network controller 130 described includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memories, or combinations thereof.

[0251] Transmitting component 2506 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 2508. In some aspects, communication manager 2504 can generate communications and send the generated communications to transmitting component 2506 for transmission to device 2508. In some aspects, transmitting component 2506 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated communications and can send the processed signals to device 2508. In some aspects, transmitting component 2506 can include the above-described combinations. Figure 2 The network controller 130 described includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, the transmit component 2506 may be co-located with the receive component 2502 in a transceiver.

[0252] In some aspects, the communication manager 2504 can perform a network connection establishment procedure for the UE 120. In some aspects, the communication manager 2504 can send (or can cause the transmitting component 2506 to send) (e.g., to the base station 110) instructions during the network connection establishment procedure regarding the UE's ability to operate as a Layer 2 relay UE. In some aspects, the communication manager 2504 can include the above-mentioned combinations... Figure 2 The network controller 130 described includes a controller / processor, memory, or a combination thereof.

[0253] In some aspects, the communication manager 2504 may include one or more components, such as the network connectivity component 2510. Alternatively, these one or more components may be separate from and distinct from the communication manager 2504. In some aspects, one or more components in the component set may include those described above. Figure 2The network controller 130 described may contain a controller / processor, memory, or a combination thereof. Alternatively, one or more components in the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion thereof) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the component's function or operation. Initiating component 2510 may initiate a connection to device 2508.

[0254] Figure 25 The number and arrangement of components shown are provided as an example. In reality, they can exist in combination with... Figure 25 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 25 The two or more components shown can be implemented within a single component, or Figure 25 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 25 The set (one or more) components shown can perform actions described by Figure 25 The other set of components shown performs one or more functions.

[0255] Figure 26 This is a schematic diagram illustrating an example 2600 of a hardware implementation of an apparatus 2605 employing a processing system 2610 according to the present disclosure. Apparatus 2605 may be a network controller 130.

[0256] Processing system 2610 can be implemented using a bus architecture typically represented by bus 2615. Bus 2615 may include any number of interconnect buses and bridges, depending on the specific application of processing system 2610 and overall design constraints. Bus 2615 links various circuits together, including one or more processors and / or hardware components represented by processor 2620, the illustrated components, and computer-readable medium / memory 2625. Bus 2615 may also link various other circuits such as timing sources, peripheral devices, voltage regulators, power management circuits, etc.

[0257] Processing system 2610 may be coupled to transceiver 2630. Transceiver 2630 is coupled to one or more antennas 2635. Transceiver 2630 provides a means for communicating with various other devices over a transmission medium. Transceiver 2630 receives signals from one or more antennas 2635, extracts information from the received signals, and provides the extracted information to processing system 2610 (specifically, receiving component 2502). Furthermore, transceiver 2630 receives information from processing system 2610 (specifically, transmitting component 2506) and generates signals to be applied to one or more antennas 2635, at least in part, based on the received information.

[0258] Processing system 2610 includes a processor 2620 coupled to a computer-readable medium / memory 2625. Processor 2620 is responsible for general-purpose processing, including executing software stored on the computer-readable medium / memory 2625. When executed by processor 2620, the software causes processing system 2610 to perform the various functions described herein with respect to any particular device. Computer-readable medium / memory 2625 may also be used to store data manipulated by processor 2620 during software execution. Processing system also includes at least one of the components shown. A component may be a software module residing / stored in computer-readable medium / memory 2625 and running in processor 2620, one or more hardware modules coupled to processor 2620, or some combination thereof.

[0259] In some aspects, processing system 2610 may be a component of network controller 130 and may include one or more of controller / processor 290, memory 292, and / or communication unit 294. In some aspects, apparatus 2605 for wireless communication includes a unit for performing a network connection establishment process for a UE. In some aspects, apparatus 2605 for wireless communication may include a unit for transmitting, during the network connection establishment process, an indication that the UE has the capability to operate as a Layer 2 relay UE. The aforementioned units may be one or more of the components of processing system 2610 configured to perform the functions described herein. As described elsewhere herein, processing system 2610 may include one or more of controller / processor 290, memory 292, and / or communication unit 294. In one configuration, the aforementioned units may be one or more of controller / processor 290, memory 292, and / or communication unit 294 configured to perform the functions and / or operations described herein.

[0260] Figure 26 This is provided as an example. Other examples can be combined with it. Figure 26 The examples described are different.

[0261] Figure 27 This is a schematic diagram illustrating an example 2700 of the code and circuitry implementation for device 2705 according to this disclosure. Device 2705 may be a network controller 130.

[0262] like Figure 27 As shown, device 2705 may include circuitry (circuit 2720) for performing a network connection establishment process. For example, circuitry 2720 may provide a unit for performing a network connection establishment process for a UE.

[0263] like Figure 27 As shown, device 2705 may include circuitry (circuit 2725) for transmitting an indication. For example, circuitry 2725 may provide a unit for transmitting an indication during the network connection establishment process regarding the UE's ability to operate as a Layer 2 relay UE.

[0264] Circuits 2720 and / or 2725 may include the above-described combination. Figure 2 One or more components of the network controller 130 described, such as controller / processor 290, memory 292 and / or communication unit 294.

[0265] like Figure 27 As shown, device 2705 may include code (code 2730) stored in computer-readable medium 2625 for performing a network connection establishment process. For example, when executed by processor 2620, code 2730 may cause device 2705 to perform a network connection establishment process for the UE.

[0266] like Figure 27 As shown, device 2705 may include code (code 2735) stored in computer-readable medium 2625 for sending instructions. For example, when executed by processor 2620, code 2735 may cause device 2705 to send an instruction regarding the UE's ability to operate as a Layer 2 relay UE during the network connection establishment process.

[0267] Figure 27 This is provided as an example. Other examples can be combined with it. Figure 27 The examples described are different.

[0268] The following provides a summary of some aspects of this disclosure:

[0269] Aspect 1: A method of wireless communication performed by a network entity component, comprising: performing a network connection establishment procedure for a user equipment (UE); and during the network connection establishment procedure, transmitting an indication that the UE has the capability to operate as a Layer 2 relay UE.

[0270] Aspect 2: According to the method of aspect 1, wherein performing the network connection establishment process includes performing a registration process for the UE.

[0271] Aspect 3: According to the method of aspect 1 or 2, wherein performing the network connection establishment process includes: performing a service request process for the UE.

[0272] Aspect 4: The method according to any one of Aspects 1-3, wherein the UE is configured for Relay Signalling Radio Bearer Zero (SRBO) service.

[0273] Aspect 5: The method according to any one of Aspects 1-4 further includes: sending an indication of a UE context associated with the UE during the network connection establishment process.

[0274] Aspect 6: The method according to any one of Aspects 1-5, wherein sending the indication regarding the UE's ability to operate as a Layer 2 relay UE comprises: sending an indication for Layer 2 relay authorization for the UE.

[0275] Aspect 7: The method according to any one of Aspects 1-6, wherein sending the indication regarding the UE's ability to operate as a Layer 2 relay UE comprises: sending the indication regarding the UE's ability to operate as a Layer 2 relay UE in an N2 message.

[0276] Aspect 8: A method of wireless communication performed by a relay user equipment (UE), comprising: initiating a connection with a network entity; and receiving a Layer 2 relay initial configuration at least in part based on the initiation of the connection.

[0277] Aspect 9: According to the method of aspect 8, initiating the connection with the network entity includes at least one of the following: performing a successful authentication and security establishment with the network entity during a Non-Access Stratum (NAS) registration and service request process, or performing a successful Access Stratum (AS) security establishment with the network entity during a Radio Resource Control (RRC) connection establishment process.

[0278] Aspect 10: The method according to aspect 8 or 9, wherein receiving the initial configuration of the Layer 2 relay includes: receiving the initial configuration of the Layer 2 relay in a Radio Resource Control (RRC) reconfiguration message from the network entity.

[0279] Aspect 11: The method according to any one of Aspects 8-10, wherein the initial configuration of the Layer 2 relay includes at least one of the following: access link radio link control (RLC) channel configuration for remote UE access link signaling radio bearer (SRB) service relay, SRB adaptation configuration for mapping access link RLC channels and local connection channels, or local connection channel configuration for remote UE side link SRB service relay.

[0280] Aspect 12: According to the method of aspect 11, wherein the access link RLC channel and local connection channel configuration includes at least one of the following: RLC entity configuration, media access control (MAC) logical channel configuration, or physical (PHY) layer configuration.

[0281] Aspect 13: The method according to any one of Aspects 8-12 further includes: receiving a request from a second UE on a local connection to establish a Layer 2 relay service, wherein the local connection includes at least one of a sidelink, a WiFi link, a WiFi Direct (WiFi-D) link, a Bluetooth (BT) link, or a Bluetooth Low Energy (BTLE) link; and sending the Layer 2 relay initial configuration to the remote UE at least in part based on receiving the request.

[0282] Aspect 14: According to the method of aspect 13, sending the Layer 2 relay initial configuration to the first UE includes: sending the Layer 2 relay initial configuration to the first UE in a sidelink message, the sidelink message indicating that the establishment of a sidelink unicast link between the first UE and the second UE is successful.

[0283] Aspect 15: The method according to aspect 13 or 14, wherein sending the Layer 2 relay initial configuration to the remote UE includes: sending the Layer 2 relay initial configuration to the remote UE in a PC5 Radio Resource Control (PC5-RRC) message.

[0284] Aspect 16: The method according to any one of Aspects 13-15, wherein the Layer 2 relay initial configuration includes a local connection radio link control (RLC) channel configuration for relaying Signaling Radio Bearer Zero (SRBO) services between the remote UE and the network entity.

[0285] Aspect 17: The method according to any one of Aspects 13-16 further includes: receiving a Signaling Radio Bearer 0 (SRB0) Radio Resource Control (RRC) Establishment Request from the remote UE; and relaying the SRB0 RRC Establishment Request to a network entity at least in part based on the Layer 2 relay initial configuration.

[0286] Aspect 18: The method according to aspect 17 further includes: receiving an RRC establishment message from the network entity; and relaying the RRC establishment message to the remote UE based at least in part on the Layer 2 relay initial configuration.

[0287] Aspect 19: A method of wireless communication performed by a network entity, comprising: receiving an indication that a user equipment (UE) has the capability to operate as a Layer 2 relay UE; and sending a Layer 2 relay initial configuration to the UE based at least in part on the receipt of the indication.

[0288] Aspect 20: The method according to aspect 19, wherein receiving the indication includes: receiving the indication from another network entity based on successful UE authentication and security establishment.

[0289] Aspect 21: The method according to aspect 19 or 20, wherein receiving the indication includes: receiving the indication in an N2 message during a non-access stratum (NAS) registration and service request process.

[0290] Aspect 22: The method according to any one of Aspects 19-20, wherein sending the Layer 2 relay initial configuration comprises: sending the Layer 2 relay initial configuration in a Radio Resource Control (RRC) reconfiguration message.

[0291] Aspect 23: The method according to any one of Aspects 19-22, wherein the initial configuration of the Layer 2 relay includes at least one of the following: access link radio link control (RLC) channel configuration for remote UE access link signaling radio bearer (SRB) service relay, SRB adaptation configuration for mapping access link RLC channels and sidelink RLC channels, or sidelink RLC channel configuration for remote UE sidelink SRB service relay.

[0292] Aspect 24: According to the method of aspect 23, wherein the access link RLC channel and local connection configuration includes at least one of the following: RLC entity configuration, media access control (MAC) logical channel configuration, or physical (PHY) layer configuration.

[0293] Aspect 25: The method according to any one of Aspects 19-24, wherein the initial configuration of the Layer 2 relay is associated with Signaling Radio Bearer Zero (SRB0).

[0294] Aspect 26: A method of wireless communication performed by a first user equipment (UE), comprising: receiving a request from a second UE to establish a Layer 2 relay service; and sending a Layer 2 relay initial configuration to the second UE based at least in part on the receipt of the request.

[0295] Aspect 27: According to the method of aspect 26, sending the Layer 2 relay initial configuration to the second UE includes: sending the Layer 2 relay initial configuration to the second UE in a sidelink message, the sidelink message indicating that the establishment of a local connection unicast link between the second UE and the first UE is successful.

[0296] Aspect 28: The method according to aspect 26 or 27, wherein sending the Layer 2 relay initial configuration to the second UE includes: sending the Layer 2 relay initial configuration to the second UE in a side link message.

[0297] Aspect 29: The method according to any one of Aspects 26-28, wherein the Layer 2 relay initial configuration includes a sidelink radio link control (RLC) channel configuration for relaying signaling radio bearer (SRB) services between the second UE and the base station.

[0298] Aspect 30: The method according to any one of Aspects 26-29 further includes: receiving a Signaling Radio Bearer 0 (SRB0) Radio Resource Control (RRC) Establishment Request from the second UE; and relaying the SRB0 RRC Establishment Request to a network entity at least in part based on the Layer 2 relay initial configuration.

[0299] Aspect 31: The method according to aspect 30 further includes: receiving an RRC establishment message from the network entity; and relaying the RRC establishment message to the second UE based at least in part on the Layer 2 relay initial configuration.

[0300] Aspect 32: A method of wireless communication performed by a first user equipment (UE), comprising: sending a request to a second UE to establish a Layer 2 relay service; and receiving a Layer 2 relay initial configuration from the second UE based at least in part on sending the request.

[0301] Aspect 33: According to the method of aspect 32, receiving the initial configuration of the Layer 2 relay from the second UE includes: receiving the initial configuration of the Layer 2 relay from the second UE in a PC5-S message, the PC5-S message indicating that the establishment of a PC5 unicast link between the first UE and the second UE is successful.

[0302] Aspect 34: The method according to aspect 32 or 33, wherein receiving the Layer 2 relay initial configuration from the second UE includes: receiving the Layer 2 relay initial configuration from the second UE in a PC5 Radio Resource Control (PC5-RRC) message.

[0303] Aspect 35: The method according to any one of Aspects 32-34, wherein the Layer 2 relay initial configuration includes a sidelink radio link control (RLC) channel configuration for relaying signaling radio bearer (SRB) services between the second UE and a network entity.

[0304] Aspect 36: The method according to any one of aspects 32-35 further includes: initiating a radio resource control (RRC) connection between the second UE and the base station based at least in part on the layer 2 relay initial configuration.

[0305] Aspect 37: 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 the method according to one or more of aspects 1-7.

[0306] Aspect 38: A device for wireless communication, comprising one or more processors coupled to a memory, the memory and the one or more processors being configured to perform the method according to one or more of aspects 1-7.

[0307] Aspect 39: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 1-7.

[0308] Aspect 40: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform the methods described in accordance with one or more of aspects 1-7.

[0309] Aspect 41: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more aspects of aspects 1-7.

[0310] Aspect 42: 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 the method according to one or more of aspects 8-18.

[0311] Aspect 43: An apparatus 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 according to one or more of aspects 8-18.

[0312] Aspect 44: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 8-18.

[0313] Aspect 45: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform the methods described in one or more of aspects 8-18.

[0314] Aspect 46: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more aspects of aspects 8-18.

[0315] Aspect 47: 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 the method according to one or more of aspects 19-25.

[0316] Aspect 48: An apparatus 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 according to one or more aspects of aspects 19-25.

[0317] Aspect 49: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 19-25.

[0318] Aspect 50: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform the methods described in one or more of aspects 19-25.

[0319] Aspect 51: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more aspects of aspects 19-25.

[0320] Aspect 52: 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 the method according to one or more aspects of aspects 26-31.

[0321] Aspect 53: An apparatus 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 according to one or more aspects of aspects 26-31.

[0322] Aspect 54: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more aspects of aspects 26-31.

[0323] Aspect 55: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform the methods described in one or more of aspects 26-31.

[0324] Aspect 56: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more aspects of aspects 26-31.

[0325] Aspect 57: 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 the method according to one or more of aspects 32-36.

[0326] Aspect 58: An apparatus 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 according to one or more aspects of aspects 32-36.

[0327] Aspect 59: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 32-36.

[0328] Aspect 60: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform the methods described in one or more of aspects 32-36.

[0329] Aspect 61: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more aspects of aspects 32-36.

[0330] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made based on the foregoing disclosure, or modifications and variations may be derived from practice in the aspects.

[0331] As used herein, the term "component" is intended to be interpreted broadly as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented using hardware, firmware, and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented using various forms of hardware, firmware, and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not intended to limit any aspect. Therefore, while the operation and behavior of the systems and / or methods are described herein without reference to specific software code, it is to be understood that the software and hardware can be designed to implement the systems and / or methods, at least in part, based on the descriptions herein.

[0332] As used in this article, depending on the context, satisfying the threshold can refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0333] Even if a specific combination of features is recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the aspects. In fact, many of these features can be combined in ways that are not specifically recited in the claims and / or specifically disclosed in the specification. While each dependent claim listed below may be directly dependent on only one claim, the disclosure of the aspects includes combinations of each dependent claim with every other claim in the claim set. The phrase “at least one of” in the list of items refers to any combination of those items, including single members. For example, “at least one of a, b, or c” is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination with multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0334] No element, action, or instruction used herein should be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are used interchangeably with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items referenced in combination with the article “the” and is used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and are used interchangeably with “one or more.” Where only one item is anticipated, the phrase “only one” or similar language is used. Furthermore, as used herein, the terms “has,” “have,” “having,” etc., are intended to be open-ended terms. Furthermore, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.” Furthermore, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or” unless otherwise expressly stated (e.g., if used in conjunction with “any” or “only one of”).

Claims

1. A method for wireless communication performed by an Access and Mobility Management Function (AMF), comprising: Prior to Layer 2 relay discovery between a user equipment (UE) and a remote UE, a network connection establishment procedure for the UE is performed, which includes a non-access stratum (NAS) network connection establishment procedure, which includes authentication and security establishment. During the network connection establishment process, an indication is sent regarding the UE's ability to operate as a Layer 2 relay UE; as well as Perform a radio resource control (RRC) connection establishment with the remote UE, wherein the UE is configured to relay signaling radio bearer zero (SRB0) services between the remote UE and the network entity.

2. The method according to claim 1, wherein, The network connection establishment process includes: Perform the registration process for the UE.

3. The method according to claim 1, wherein, The network connection establishment process includes: Perform the service request procedure for the UE.

4. The method according to claim 1, further comprising: During the network connection establishment process, an indication of the UE context associated with the UE is sent.

5. The method according to claim 1, wherein, Sending the indication that the UE has the capability to operate as a Layer 2 relay UE includes: Send an instruction for Layer 2 relay authorization for the UE.

6. The method according to claim 1, wherein, Sending the indication that the UE has the capability to operate as a Layer 2 relay UE includes: The N2 message sends an indication that the UE has the capability to operate as a Layer 2 relay UE.

7. A network entity for wireless communication, comprising: One or more memory units; as well as One or more processors coupled to the one or more memories and configured to: Prior to Layer 2 relay discovery between a user equipment (UE) and a remote UE, a network connection establishment procedure for the UE is performed, which includes a non-access stratum (NAS) network connection establishment procedure, which includes authentication and security establishment. During the network connection establishment process, an indication is sent regarding the UE's ability to operate as a Layer 2 relay UE; as well as Perform a radio resource control (RRC) connection establishment with the remote UE, wherein the UE is configured to relay signaling radio bearer zero (SRB0) services between the remote UE and the network entity.

8. A non-transitory computer-readable medium storing a set of instructions for wireless communication, comprising one or more instructions that, when executed by one or more processors of a network entity, cause the network entity to perform the following operations: Prior to Layer 2 relay discovery between a user equipment (UE) and a remote UE, a network connection establishment procedure for the UE is performed, which includes a non-access stratum (NAS) network connection establishment procedure, which includes authentication and security establishment. During the network connection establishment process, an indication is sent regarding the UE's ability to operate as a Layer 2 relay UE; as well as Perform a radio resource control (RRC) connection establishment with the remote UE, wherein the UE is configured to relay signaling radio bearer zero (SRB0) services between the remote UE and the network entity.

9. An apparatus for wireless communication includes: A unit for performing a network connection establishment process for a user equipment (UE) prior to Layer 2 relay discovery between a user equipment (UE) and a remote UE, the network connection establishment process including a non-access stratum (NAS) network connection establishment process, the NAS network connection establishment process including authentication and security establishment; A unit for sending an indication during the network connection establishment process that the UE has the capability to operate as a Layer 2 relay UE; as well as A unit for performing Radio Resource Control (RRC) connection establishment with the remote UE, wherein the UE is configured to relay Signaling Radio Bearer Zero (SRB0) services between the remote UE and the network entity.

10. A method for wireless communication performed by a first user equipment (UE), comprising: Before Layer 2 relay discovery between the first UE and the second UE, initiate a connection with the network entity; The initial configuration for receiving the Layer 2 relay is received at least in part based on initiating the connection. Receive a Signaling Radio Bearer Zero (SRB0) Radio Resource Control (RRC) Establishment Request from the second UE; The SRB0 RRC establishment request is relayed to the network entity, at least in part, based on the initial configuration of the Layer 2 relay. as well as The relay is used for the signaling radio bearer zero (SRB0) service between the second UE and the network entity.

11. The method according to claim 10, wherein, Initiating a connection with the network entity includes at least one of the following: Successful authentication and security establishment are performed with the network entity during the Non-Access Stratum (NAS) registration and service request process, or During the Radio Resource Control (RRC) connection establishment process, a successful access layer (AS) security establishment is performed with the network entity.

12. The method according to claim 10, wherein, Receiving the initial configuration of the Layer 2 relay includes: The initial configuration of the Layer 2 relay is received in a Radio Resource Control (RRC) reconfiguration message from the network entity.

13. The method according to claim 10, wherein, The initial configuration of the Layer 2 relay includes at least one of the following: Access Link Radio Link Control (RLC) channel configuration for remote UE access link signaling radio bearer (SRB) service relay. The adaptation layer configuration for SRBs used for mapping access link RLC channels and local connection channels, or Local connection channel configuration for remote UE-side traveling link SRB service relay.

14. The method according to claim 13, wherein, The access link RLC channel and local connection channel configuration includes at least one of the following: RLC entity configuration, Media Access Control (MAC) logical channel configuration, or Physical (PHY) layer configuration.

15. The method of claim 10, further comprising: On the local connection, a request to establish a Layer 2 relay service is received from the second UE. The local connection includes at least one of a sidelink, a WiFi link, a WiFi Direct (WiFi-D) link, a Bluetooth (BT) link, or a Bluetooth Low Energy (BTLE) link; and The Layer 2 relay initial configuration is sent to the second UE at least in part based on receiving the request.

16. The method according to claim 15, wherein, Sending the Layer 2 relay initial configuration to the second UE includes: The Layer 2 relay initial configuration is sent to the second UE in a sidelink message, which indicates that the establishment of the sidelink unicast link between the second UE and the first UE is successful.

17. The method according to claim 15, wherein, Sending the Layer 2 relay initial configuration to the second UE includes: The initial configuration of the Layer 2 relay is sent to the second UE in a PC5 Radio Resource Control (PC5-RRC) message.

18. The method according to claim 15, wherein, The Layer 2 relay initial configuration includes a local connection (RLC) channel configuration for relaying Signaling Radio Bearer Zero (SRB0) services between the second UE and the network entity.

19. The method of claim 10, further comprising: Receive an RRC establishment message from the network entity; as well as The RRC establishment message is relayed to the second UE at least in part based on the Layer 2 relay initial configuration.

20. A first user equipment (UE) for wireless communication, comprising: One or more memory units; One or more processors coupled to the one or more memories and configured such that the first UE: Before Layer 2 relay discovery between the first UE and the second UE, initiate a connection with the network entity; The initial configuration for receiving the Layer 2 relay is received at least in part based on initiating the connection. Receive a Signaling Radio Bearer Zero (SRB0) Radio Resource Control (RRC) Establishment Request from the second UE; The SRB0 RRC establishment request is relayed to the network entity, at least in part, based on the initial configuration of the Layer 2 relay. as well as The relay is used for the signaling radio bearer zero (SRB0) service between the second UE and the network entity.

21. A non-transitory computer-readable medium storing a set of instructions for wireless communication, comprising one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to perform the following operations: Before Layer 2 relay discovery between the first UE and the second UE, initiate a connection with the network entity; The initial configuration for receiving the Layer 2 relay is received at least in part based on initiating the connection. Receive a Signaling Radio Bearer Zero (SRB0) Radio Resource Control (RRC) Establishment Request from the second UE; The SRB0 RRC establishment request is relayed to the network entity, at least in part, based on the initial configuration of the Layer 2 relay. as well as The relay is used for the signaling radio bearer zero (SRB0) service between the second UE and the network entity.

22. A first user equipment (UE) for wireless communication includes: A unit for initiating a connection with a network entity before Layer 2 relay discovery between the first UE and the second UE; A unit for receiving the initial configuration of the Layer 2 relay based at least in part on initiating the connection; A unit for receiving a signaling radio bearer zero (SRB0) radio resource control (RRC) establishment request from the second UE; A unit for relaying the SRB0 RRC establishment request to the network entity based at least in part on the Layer 2 relay initial configuration; as well as A unit for relaying Signaling Radio Bearer Zero (SRB0) services for the second UE and the network entity.

23. A method for wireless communication performed by a network entity, comprising: As part of the network connection establishment process, an indication is received from the Access and Mobility Management Function (AMF) regarding the user equipment (UE)'s ability to operate as a Layer 2 relay UE. The network connection establishment process includes a Non-Access Stratum (NAS) network connection establishment process performed prior to Layer 2 relay discovery between the UE and a second UE. The NAS network connection establishment process includes authentication and security establishment. At least in part based on receiving the instruction, the Layer 2 relay initial configuration is sent to the UE; Perform Radio Resource Control (RRC) connection establishment with the second UE; as well as The signaling radio bearer (SRB) service is transmitted from the UE to the second UE.

24. The method according to claim 23, wherein, Receiving the instruction includes: The instruction is received from the AMF based on successful UE authentication and security establishment.

25. The method according to claim 23, wherein, Receiving the instruction includes: The instruction is received in an N2 message during the Non-Access Stratum (NAS) registration and service request process.

26. The method according to claim 23, wherein, Sending the initial configuration for the Layer 2 relay includes: The initial configuration of the Layer 2 relay is sent in the Radio Resource Control (RRC) reconfiguration message.

27. The method according to claim 23, wherein, The initial configuration of the Layer 2 relay includes at least one of the following: Access Link Radio Link Control (RLC) channel configuration for second UE access link signaling radio bearer (SRB) service relay. SRB adaptation configuration for mapping access link RLC channels and local connection channels, or Local connection channel configuration for second UE side traveling link SRB service relay.

28. The method according to claim 27, wherein, The access link RLC and local connection channel configuration includes at least one of the following: RLC entity configuration, Media Access Control (MAC) logical channel configuration, or Physical (PHY) layer configuration.

29. The method according to claim 23, wherein, The initial configuration of the Layer 2 relay is associated with Signaling Radio Bearer Zero (SRB0).

30. A network entity for wireless communication, comprising: One or more memory units; One or more processors coupled to the one or more memories and configured such that the network entity: As part of the network connection establishment process, an indication is received from the Access and Mobility Management Function (AMF) regarding the user equipment (UE)'s ability to operate as a Layer 2 relay UE. The network connection establishment process includes a Non-Access Stratum (NAS) network connection establishment process performed prior to Layer 2 relay discovery between the UE and a second UE. The NAS network connection establishment process includes authentication and security establishment. At least in part based on receiving the instruction, the Layer 2 relay initial configuration is sent to the UE; Perform Radio Resource Control (RRC) connection establishment with the second UE; as well as The signaling radio bearer (SRB) service is transmitted from the UE to the second UE.

31. A non-transitory computer-readable medium storing a set of instructions for wireless communication, comprising one or more instructions that, when executed by one or more processors of a network entity, cause the network entity to perform the following operations: As part of the network connection establishment process, an indication is received from the Access and Mobility Management Function (AMF) regarding the user equipment (UE)'s ability to operate as a Layer 2 relay UE. The network connection establishment process includes a Non-Access Stratum (NAS) network connection establishment process performed prior to Layer 2 relay discovery between the UE and a second UE. The NAS network connection establishment process includes authentication and security establishment. At least in part based on receiving the instruction, the Layer 2 relay initial configuration is sent to the UE; Perform Radio Resource Control (RRC) connection establishment with the second UE; as well as The signaling radio bearer (SRB) service is transmitted from the UE to the second UE.

32. An apparatus for wireless communication includes: A unit for receiving, as part of a network connection establishment process, an indication from the Access and Mobility Management Function (AMF) regarding the user equipment (UE)'s ability to operate as a Layer 2 relay UE, the network connection establishment process including a non-access stratum (NAS) network connection establishment process performed prior to Layer 2 relay discovery between the UE and a second UE, the NAS network connection establishment process including authentication and security establishment; A unit for sending a Layer 2 relay initial configuration to the UE based at least in part on receiving the instruction; A unit for performing the establishment of a radio resource control (RRC) connection with the second UE; as well as A unit for transmitting signaling radio bearer (SRB) services from the UE to the second UE via the UE.

33. A method for wireless communication performed by a first user equipment (UE), comprising: Send a request to establish Layer 2 relay service to the second UE; The initial configuration is received from the second UE at least in part based on sending the request, wherein the initial configuration includes a sidelink radio link control (RLC) channel configuration for relaying signaling radio bearer (SRB) services between the first UE and a network entity. Initiating a Radio Resource Control (RRC) connection between the second UE and a network entity, at least in part, based on the Layer 2 relay initial configuration; and Transmit Signaling Radio Bearer (SRB) services with the network entity.

34. The method according to claim 33, wherein, Receiving the Layer 2 relay initial configuration from a relay UE includes: The Layer 2 relay initial configuration is received from the second UE in a sidelink message, which indicates that the establishment of the local connection unicast link between the first UE and the second UE is successful.

35. The method according to claim 33, wherein, Receiving the initial configuration of the Layer 2 relay from the second UE includes: The Layer 2 relay initial configuration is received from the second UE in the side link message.

36. An apparatus for wireless communication at a first user equipment (UE), comprising: One or more memory units; One or more processors coupled to the one or more memories and configured such that the first UE: Send a request to the second UE to establish a Layer 2 relay service; and The initial configuration is received from the second UE at least in part based on sending the request, wherein the initial configuration includes a sidelink radio link control (RLC) channel configuration for relaying signaling radio bearer (SRB) services between the first UE and a network entity. Initiating a Radio Resource Control (RRC) connection between the second UE and a network entity, at least in part, based on the Layer 2 relay initial configuration; and Transmit Signaling Radio Bearer (SRB) services with the network entity.

37. A non-transitory computer-readable medium storing a set of instructions for wireless communication, comprising one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to perform the following operations: Send a request to establish Layer 2 relay service to the second UE; The initial configuration is relayed from the second UE's receiving layer 2 based at least in part on sending the request, wherein, The Layer 2 relay initial configuration includes a sidelink radio link control (RLC) channel configuration for relaying signaling radio bearer (SRB) services between the first UE and the network entity; The radio resource control (RRC) connection between the second UE and the network entity is initiated at least in part based on the initial configuration of the Layer 2 relay; as well as Transmit Signaling Radio Bearer (SRB) services with the network entity.

38. An apparatus for wireless communication includes: A unit used to send a request to the second UE to establish a Layer 2 relay service; A unit for receiving a Layer 2 relay initial configuration from the second UE based at least in part on sending the request, wherein the Layer 2 relay initial configuration includes a sidelink radio link control (RLC) channel configuration for relaying signaling radio bearer (SRB) services between the first UE and a network entity. A unit for initiating a radio resource control (RRC) connection between the second UE and a network entity, at least in part based on the Layer 2 relay initial configuration; and Units used for transmitting Signaling Radio Bearer (SRB) services with the network entity.

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