V2X Groupcast Destination IDs for Out-of-Coverage Sidelinks
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing groupcast communications over sidelinks, particularly in out-of-coverage scenarios, where base stations do not provide resource allocation or interference management, leading to inefficiencies and potential conflicts in group ID management.
Innovation Solution
Implementing a wireless communication system with logical groups of user devices that assign a unique destination identification to all members, managed by an application server or autonomously by UEs, and utilizing a group leader to resolve conflicts and optimize resource allocation, with decentralized groupcast communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If decentralized groupcast communication is implemented without base station coverage, then communication autonomy is improved, but group ID management conflicts increase
Solution Approach 1:
The system performs preliminary actions by pre-configuring UEs with a pool of candidate group IDs and establishing conflict resolution protocols before decentralized communication begins. This allows UEs to autonomously select and manage group IDs without base station intervention, resolving the contradiction between communication autonomy and group ID management reliability.
Solution Approach 2:
The invention implements feedback mechanisms where UEs monitor and report group ID usage and conflicts to other group members. This distributed feedback system enables autonomous conflict detection and resolution, maintaining reliability while preserving communication autonomy in out-of-coverage scenarios.
2Reliability
If unique destination ID is assigned to all group members, then communication reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the destination ID information into the existing groupcast message structure, combining multiple functions (group identification, destination identification, and message content) into a single signaling transmission. This reduces signaling overhead while maintaining the reliability benefits of unique destination IDs for all group members.
3Reliability
If application server manages group ID assignment, then group ID uniqueness is improved, but system complexity increases
Solution Approach 1:
The invention introduces an application server as an intermediary that manages group ID assignment and conflict resolution. This centralized intermediary handles the complexity of ensuring unique group IDs, while UEs follow simple protocols for selection and reporting, thereby maintaining group ID uniqueness without significantly increasing UE complexity.
4Device complexity
If autonomous group ID selection by UEs is implemented, then system complexity is reduced, but group ID conflicts increase
Solution Approach 1:
The system implements self-service mechanisms where UEs autonomously select group IDs from a pre-configured pool and independently resolve conflicts using distributed algorithms. This reduces system complexity by eliminating centralized management while maintaining reliability through self-organizing conflict resolution protocols.
Data Source
AI summary
A wireless communication system includes a plurality of user devices, UEs, and at least one logical group defined in accordance with one or more logical group criteria. The logical group includes a plurality of member UEs to be connected via sidelink for sidelink communication with each other, and all member UEs of the logical group have assigned the same destination identification, ID, the destination ID being unique for the logical group.