WTRU-to-WTRU Relay Discovery for Extended Unicast Links

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently utilizing relay communications and Vehicle-to-Everything (V2X) services, particularly in terms of link establishment and management, especially in advanced or next-generation networks using new radio access technology.

Innovation Solution

The implementation of WTRU-to-WTRU relay scenarios, including transparent and non-transparent relays, with enhanced link identifier update procedures and service-oriented discovery protocols, to facilitate efficient communication and link management in advanced wireless networks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If relay communications and V2X services are implemented in advanced wireless networks, then communication coverage and service capability are improved, but link establishment complexity and management overhead increase

Engineering Contradiction:

Improvecommunication coverage and service capabilityVSAvoidlink establishment complexity and management overhead

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the relay communication system into distinct functional components: discovery messages for service announcement, link identifier updates for dynamic link management, and separate relay WTRU roles (transparent and non-transparent). This segmentation allows independent optimization of each component, reducing overall system complexity while maintaining enhanced coverage and service capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary action through pre-configured link identifiers and pre-established relay capabilities. WTRUs prepare link identifiers and relay configurations in advance, enabling faster link establishment when relay services are needed, thereby reducing management overhead during actual operation while maintaining service versatility.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If link identifier update procedures are enhanced for relay communications, then link management efficiency is improved, but signaling overhead and processing requirements increase

Engineering Contradiction:

Improvelink management efficiencyVSAvoidsignaling overhead and processing requirements

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent creates universal link identifier structures that serve multiple functions: identifying relay links, indicating link status, and enabling link updates. This multi-functionality reduces the need for separate signaling messages for different link management tasks, thereby improving efficiency without proportionally increasing signaling overhead.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent optimizes link identifier parameters by using compact representations and selective updates. Instead of transmitting complete link information repeatedly, the system changes only necessary parameters (such as link identifier updates when links are established or released), reducing processing requirements while maintaining efficient link management.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If service-oriented discovery protocols are implemented, then direct discovery capability is improved, but protocol complexity and implementation overhead increase

Engineering Contradiction:

Improvedirect discovery capabilityVSAvoidprotocol complexity and implementation overhead

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent implements self-service discovery where WTRUs autonomously perform discovery operations using standardized message formats. The discovery protocol enables WTRUs to independently announce services, detect available relays, and establish links without complex centralized coordination, improving ease of operation while keeping implementation overhead manageable through self-contained discovery procedures.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12439234B2Methods and apparatus for direct discovery and communication using a WTRU to WTRU relay

Publication Date: 2025.10.07 INTERDIGITAL PATENT HOLDINGS INC

AI summary

Methods, apparatus, systems, architectures and interfaces, performed by a relay wireless transmit/receive unit (R-WTRU) including a transmitter, a receiver, a memory, and a processor, for establishing extended unicast links and management unicast links are provided. The method includes: performing, by the R-WTRU, a link establishment procedure for establishing any number of extended unicast links for relaying traffic between a service-provider WTRU (SP-WTRU) and any number of service-user WTRUs (SU-WTRUs) according to a mapping generated by the R-WTRU, the link establishment procedure including: (1) generating a mapping of any of the extended links and layer 2 (L2) identifiers (IDs) for any of a SP-WTRU, a R-WTRU, and any number of SU-WTRUs, and (2) transmitting a unique relay ID; establishing a management unicast link for the extended unicast links; and applying any number of link management requests received via the management unicast link to associated extended unicast links.