# US 12,193,088 B2 · Apparatuses and methods for SideLink (SL) communication in a User Equipment (UE)-to-UE relaying architecture

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- Number: US 12,193,088 B2
- Document ID: US12193088B2
- Status: Granted
- Kind: B2
- Application number: 18/461,803
- Filed: 2023-09-06
- Published: 2023-12-28
- Granted: 2025-01-07
- Earliest claimed: 2020-03-30
- Assignees: MediaTek Singapore Pte. Ltd.
- Applicants: MediaTek Singapore Pte. Ltd.
- Inventors: Nathan Edward Tenny; Guan-Yu Lin; Xuelong Wang; Ming-Yuan Cheng
- Web page: https://patentgrep.com/patent/US12193088B2

## CPC

- H04W 76/14: Direct-mode setup
- H04W 88/04: adapted for relaying to or from another terminal or user
- H04W 76/15: Setup of multiple wireless link connections
- H04W 76/11: Allocation or use of connection identifiers
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method executed by a relay UE is provided. The relay UE receives an incoming SideLink (SL) transmission from the first remote UE on the first RLC channel, wherein the first RLC channel is associated with an SL Radio Bearer (SLRB) ID, in which the incoming SL transmission includes the first identifier, which includes the SLRB ID and a first UE ID. The relay UE sends an outgoing SL transmission to a second remote UE on a second RLC channel according to the SLRB ID and the first UE ID.

## Claims

### Claim 1

A method, executed by a relay User Equipment (UE), the method comprising:
receiving an incoming SideLink (SL) transmission from a first remote UE on a first RLC channel,
wherein the first RLC channel is associated with an SL Radio Bearer (SLRB) ID,
wherein the incoming SL transmission comprises a first identifier, and the first identifier comprises the SL Radio Bearer (SLRB) ID and a first UE ID; and
sending an outgoing SL transmission to a second remote UE on a second RLC channel according to the SL Radio Bearer (SLRB) ID and the first UE ID.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein the outgoing SL transmission comprises the first UE ID or a second UE ID.

### Claim 3 (depends on 2)

The method as claimed in claim 2, wherein the first UE ID is the UE ID of the first remote UE, and the second UE ID is the UE ID of the second remote UE.

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein the first UE ID is the UE ID of the second remote UE, and the second UE ID is the UE ID of the first remote UE.

### Claim 5 (depends on 1)

The method as claimed in claim 1, further comprising:
determining the second RLC channel for the outgoing SL transmission based on the SL Radio Bearer (SLRB) ID.

### Claim 6 (depends on 5)

The method as claimed in claim 5, further comprising:
determining the second RLC channel for the outgoing SL transmission based on the SL Radio Bearer (SLRB) ID and the first UE ID.

### Claim 7

A method, executed by a first remote UE, the method comprising:
receiving an incoming SideLink (SL) transmission on a first RLC channel, wherein the first RLC channel is associated with an SL Radio Bearer (SLRB) ID, wherein the incoming SL transmission comprises the SL Radio Bearer (SLRB) ID and a first UE ID; and
sending an outgoing SL transmission on a second RLC channel according to the SL Radio Bearer (SLRB) ID.

### Claim 8 (depends on 7)

The method as claimed in claim 7, wherein the outgoing SL transmission comprises the first UE ID or a second UE ID.

### Claim 9 (depends on 7)

The method as claimed in claim 7, wherein the first UE ID is the UE ID of the second remote UE, and the second UE ID is the UE ID of the first remote UE the end-to-end identifier is indicated in the first reconfiguration complete message.

### Claim 10 (depends on 7)

The method as claimed in claim 7, wherein the first UE ID is the UE ID of the first remote UE, and the second UE ID is the UE ID of the second remote UE.

### Claim 11 (depends on 7)

The method as claimed in claim 7, further comprising:
determining the second RLC channel for the outgoing SL transmission based on the SL Radio Bearer (SLRB) ID.