# US 12,015,996 B2 · Sidelink resource handling for CU-DU split based V2X communication

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- Number: US 12,015,996 B2
- Document ID: US12015996B2
- Status: Granted
- Kind: B2
- Application number: 17/414,422
- Filed: 2020-01-09
- Published: 2022-03-03
- Granted: 2024-06-18
- Earliest claimed: 2019-01-16
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jian Xu; Daewook Byun; Seokjung Kim
- Web page: https://patentgrep.com/patent/US12015996B2

## CPC

- H04W 72/02: Selection of wireless resources by user or terminal
- H04W 72/20: Control channels or signalling for resource management
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W 48/18: Selecting a network or a communication service
- H04W 76/14: Direct-mode setup
- H04W 84/005: {Moving wireless networks}
- H04W 88/04: adapted for relaying to or from another terminal or user
- H04W 88/085: {Access point devices with remote components}
- H04W 92/18: between terminal devices
- 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 and apparatus for sidelink resource handling for central unit (CU)-distributed unit (DU) split based vehicle-to-everything (V2X) communication is provided. A gNB central unit (gNB-CU) in a wireless communication system receives, from a wireless device, information related to a radio access technology (RAT) for which a sidelink resource is requested. The gNB-CU transmits, to a gNB distributed unit (gNB-DU), the information related to the RAT for sidelink resource allocation.

## Claims

### Claim 1

A method performed by a gNB central unit (gNB-CU) operating in a wireless communication system, the method comprising:
receiving, from a wireless device, a sidelink resource request for a specific radio access technology (RAT);
transmitting, to a gNB distributed unit (gNB-DU), the sidelink resource request for the specific RAT;
receiving, from the gNB-DU, a sidelink resource for the specific RAT, after transmitting the sidelink resource request for the specific RAT to the gNB-DU; and
transmitting, to the wireless device, the sidelink resource for the specific RAT,
wherein the gNB-CU is a logical node constituting a gNB that hosts a radio resource control (RRC) layer and a packet data convergence protocol (PDCP) layer, and
wherein the gNB-DU is a logical node constituting a gNB that hosts a radio link control (RLC) layer, a media access control (MAC) layer and a physical layer.

### Claim 2 (depends on 1)

The method of claim 1, wherein the specific RAT only includes a 4G long-term evolution (LTE).

### Claim 3 (depends on 1)

The method of claim 1, wherein the specific RAT only includes a 5G new radio access technology (NR).

### Claim 4 (depends on 1)

The method of claim 1, wherein the specific RAT includes both a 4G LTE and a 5G NR.

### Claim 5 (depends on 1)

The method of claim 1, further comprising checking the specific RAT based on the sidelink resource request for the specific RAT.

### Claim 6 (depends on 1)

The method of claim 1, wherein high level resource information to be used for a vehicle-to-everything (V2X) sidelink communication is transmitted to the gNB-DU together with the sidelink resource request for the specific RAT.

### Claim 7 (depends on 1)

The method of claim 1, wherein a capability of the wireless device for the specific RAT is transmitted to the gNB-DU together with the sidelink resource request for the specific RAT.

### Claim 8 (depends on 1)

The method of claim 1, wherein the sidelink resource for the specific RAT is transmitted to the wireless device via a dedicated signaling by using at least one of a dynamic resource allocation or a configured grant.

### Claim 9 (depends on 1)

The method of claim 1, wherein the wireless device is in communication with at least one of a mobile terminal, a network, or autonomous vehicles other than the wireless device.

### Claim 10

A gNB central unit (gNB-CU) operating in a wireless communication system, the method comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
receiving, from a wireless device, a sidelink resource request for a specific radio access technology (RAT);
transmitting, to a gNB distributed unit (gNB-DU), the sidelink resource request for the specific RAT;
receiving, from the gNB-DU, a sidelink resource for the specific RAT, after transmitting the sidelink resource request for the specific RAT to the gNB-DU; and
transmitting, to the wireless device, the sidelink resource for the specific RAT,
wherein the gNB-CU is a logical node constituting a gNB that hosts a radio resource control (RRC) layer and a packet data convergence protocol (PDCP) layer, and
wherein the gNB-DU is a logical node constituting a gNB that hosts a radio link control (RLC) layer, a media access control (MAC) layer and a physical layer.

### Claim 11

A user equipment (UE) operating in a wireless communication system, the method comprising:
transmitting, to a gNB central unit (gNB-CU), a sidelink resource request for a specific radio access technology (RAT); and
receiving, from the gNB-CU, a sidelink resource for the specific RAT,
wherein the sidelink resource for the specific RAT is received by the gNB-CU from the gNB-DU after the gNB-CU transmits the sidelink resource request for the specific RAT to the gNB-DU,
wherein the gNB-CU is a logical node constituting a gNB that hosts a radio resource control (RRC) layer and a packet data convergence protocol (PDCP) layer, and
wherein the gNB-DU is a logical node constituting a gNB that hosts a radio link control (RLC) layer, a media access control (MAC) layer and a physical layer.