Relay UE Link Modification for Wireless Communication
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Solution Overview
Problem
Current wireless communication systems face challenges in establishing efficient UE-to-UE relay connections, particularly in ensuring authorization, visibility, and quality of service for relayed communications, especially in scenarios where direct communication is not possible.
Innovation Solution
The proposed method integrates UE-to-UE relay discovery and selection into the unicast link establishment procedure, allowing for the use of relays in communication by including a relay indication field in Direct Communication Request messages and enabling relay authorization, security establishment, and quality of service management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE-to-UE relay connections are established to enable communication when direct communication is not possible, then communication reliability is improved, but system complexity increases due to authorization, security establishment, and quality of service management requirements
Solution Approach 1:
The patent combines relay discovery, relay selection, and unicast link establishment into a single integrated procedure. The relay indication field is embedded within existing Direct Communication Request messages, and the network device handles relay authorization, security establishment, and quality of service configuration in one coordinated process, rather than as separate procedures.
Solution Approach 2:
The network device performs multiple functions simultaneously: it authorizes relay connections, establishes security contexts, configures quality of service parameters, and manages resource allocation all through the unified link establishment procedure. This multi-functional approach reduces the need for separate control mechanisms.
2Ease of operation
If relay indication field is included in Direct Communication Request messages to integrate relay discovery and selection, then ease of operation is improved, but message complexity increases
Solution Approach 1:
The relay indication field is integrated into the existing Direct Communication Request message structure rather than creating a separate relay discovery message. This merging approach allows relay indication to be conveyed using the same signaling infrastructure already in place for direct communication requests.
Solution Approach 2:
The Direct Communication Request message serves dual purposes: it initiates direct communication requests and simultaneously indicates relay usage requirements when the relay indication field is set. This multi-functionality reduces the need for additional dedicated signaling messages.
Data Source
AI summary
A method and device are disclosed for connecting with another User Equipment (UE). In one embodiment, the method includes a first UE connecting with a second UE via a relay UE, wherein a first PC5 unicast link is established between the first UE and the relay UE. The method also includes the first UE transmitting a Link Modification Request message to the relay UE, wherein the Link Modification Request message includes a third User Info of a third UE. The method further includes the first UE receiving a Link Modification Accept message from the relay UE.