Relay UE Protocol Layer for Header-Based Next-Hop Routing

Solution Overview

Problem

In existing 5G wireless systems, the communication between remote UEs through relay UEs requires network equipment to configure the mapping relationship between remote UEs and radio bearers, leading to increased transmission overhead and delay.

Innovation Solution

Introduce a relay protocol layer into the protocol stack of relay UEs, allowing the relay sending and receiving entities to determine the next hop node based on the protocol header of the relay PDU, eliminating the need for network equipment configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If network equipment configures the mapping relationship between remote UE and radio bearer, then communication between remote UEs can be implemented, but transmission overhead increases and service delay occurs

Engineering Contradiction:

Improvecommunication implementationVSAvoidservice delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent extracts the mapping relationship configuration from network equipment control to relay UE autonomous determination. The relay UE independently determines the mapping relationship between remote UE and radio bearer based on protocol headers of relay PDUs, eliminating the need for network equipment to configure and transmit mapping relationships, thus reducing transmission overhead and service delay.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The relay UE performs self-service by autonomously determining the mapping relationship without external configuration. The relay receiving entity determines the mapping relationship based on protocol headers received from remote UEs, and the relay sending entity uses this determined mapping to forward PDUs, enabling the system to self-configure and operate without network equipment intervention.

Inventive Principle:

Principle #25Self-service

2Reliability

If network equipment configures the mapping relationship between remote UE and radio bearer, then communication between remote UEs can be implemented, but transmission overhead increases

Engineering Contradiction:

Improvecommunication implementationVSAvoidtransmission overhead

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The patent extracts the mapping relationship configuration from network equipment control to relay UE autonomous determination. The relay UE independently determines the mapping relationship between remote UE and radio bearer based on protocol headers of relay PDUs, eliminating the need for network equipment to configure and transmit mapping relationships, thus reducing transmission overhead and service delay.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The relay UE acts as an intermediary that autonomously determines mapping relationships based on protocol headers received from remote UEs. The relay receiving entity extracts mapping information from protocol headers, and the relay sending entity uses this information to forward PDUs, eliminating the need for direct network equipment configuration and reducing overhead.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If network equipment configures the mapping relationship between remote UE and radio bearer, then communication between remote UEs can be implemented, but device complexity increases

Engineering Contradiction:

Improvecommunication implementationVSAvoidconfiguration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the mapping relationship configuration from network equipment control to relay UE autonomous determination. The relay UE independently determines the mapping relationship between remote UE and radio bearer based on protocol headers of relay PDUs, eliminating the need for network equipment to configure and transmit mapping relationships, thus reducing transmission overhead and service delay.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The relay UE performs self-service by autonomously determining the mapping relationship without external configuration. The relay receiving entity determines the mapping relationship based on protocol headers received from remote UEs, and the relay sending entity uses this determined mapping to forward PDUs, enabling the system to self-configure and operate without network equipment intervention.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12414032B2Relay method, routing table generation method and apparatus, terminal, and storage medium

Publication Date: 2025.09.09 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

The application discloses a relay method, a routing table generation method and apparatus, a terminal and a storage medium. The relay method is applied to a relay UE. The relay UE comprises a relay protocol stack, the relay protocol stack being located between a PDCP layer and a layer 2 protocol stack of a PC5 interface, or the relay protocol stack being a MAC layer protocol stack, and the relay protocol stack comprising a relay receiving entity and a relay sending entity. The relay method comprises: the relay receiving entity receiving a relay protocol data unit (PDU) sent by a last hop node, and forwarding the relay PDU to the relay sending entity; and the relay sending entity sending the relay PDU to a next hop node according to a protocol header of the relay PDU, the relay PDU being a PDU sent between at least two remote UEs.