Target UE PC5 Connection Management for Relay Communication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently supporting UE-to-UE relay communication in 5G networks, particularly in establishing and managing reliable PC5 connections for ProSe services, which are essential for proximity-based services and public safety applications.
Innovation Solution
The implementation of a method and device for target end UE to establish and manage PC5 connections with relay UE, including request message handling and link management protocols, to facilitate UE-to-UE relay communication, ensuring efficient discovery and configuration of Layer-2 and Layer-3 connections for ProSe services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the target end UE establishes multiple PC5 connections with the relay UE for supporting UE-to-UE relay communication with multiple source end UEs, then the communication capability and service coverage are improved, but the device complexity and connection management overhead increase
Solution Approach 1:
The patent segments the connection management process into distinct phases: discovery phase where the target end UE identifies multiple source end UEs, evaluation phase where connection parameters are assessed, and establishment phase where individual PC5 connections are created. This segmentation allows the system to handle multiple connections systematically, reducing management complexity while maintaining adaptability.
Solution Approach 2:
The target end UE performs preliminary actions by pre-evaluating and pre-configuring connection parameters before actually establishing PC5 connections. The UE prepares connection profiles and criteria in advance, which streamlines the subsequent connection establishment process and reduces real-time management overhead when multiple connections need to be formed.
2Reliability
If the target end UE sends reject messages to the relay UE when PC5 connections already exist, then connection reliability is improved, but the signaling overhead and communication delay increase
Solution Approach 1:
The target end UE performs preliminary checks to determine whether a PC5 connection already exists before processing new connection requests. By evaluating connection status in advance, the system can immediately reject duplicate connection attempts with a simple reject message, avoiding the time-consuming process of establishing redundant connections while maintaining connection reliability.
Solution Approach 2:
Instead of allowing all connection requests to proceed through the full establishment process and then detecting conflicts, the system inverts the approach by proactively checking for existing connections and rejecting incompatible requests early in the process. This reversal of the traditional flow minimizes unnecessary signaling and reduces communication delay.
Data Source
AI summary
A method and device for a target end UE are disclosed. In one embodiment, the target end UE establishes a PC5 connection with the relay UE for supporting UE-to-UE relay communication between a first source end UE and the target end UE via the relay UE. The target end UE also receives a request message from the relay UE for request of establishing another PC5 connection with the relay UE for supporting UE-to-UE relay communication with a second source end UE via the relay UE. Furthermore, the target end UE, in response to reception of the request message, sends a reject message to the relay UE if the PC5 connection exists.