Sidelink Resource Configuration for Wireless Handover
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Solution Overview
Problem
In wireless networks, especially in 5G V2X systems, group terminals experiencing cell handover face communication interference due to mismatched sidelink resources across different cells, disrupting the continuity and stability of intra-group communication.
Innovation Solution
A method where a base station determines and configures a sidelink resource valid in both the original and target cells for a group of terminals during handover, ensuring seamless communication by negotiating with the adjacent base station to allocate a shared sidelink resource that is valid across cells or base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different terminals in a group are located in different cells during handover, then cell handover is necessary for network coverage, but communication interference occurs due to mismatched sidelink resources across cells
Solution Approach 1:
The patent configures sidelink resources that are valid across multiple cells (first cell and second cell) simultaneously, allowing the same resource to be universally used by the terminal group regardless of which cell they are in. This multi-cell validity approach eliminates resource mismatch and communication interference during handover, while maintaining communication continuity.
Solution Approach 2:
The base station performs preliminary configuration of cross-cell sidelink resources before the terminal group undergoes handover. By pre-configuring resources that are valid in both the source and target cells, the system avoids communication interference during the handover transition, ensuring seamless continuity without interruption.
2Reliability
If cell handover is performed for terminals in a group, then network coverage and signal quality are improved, but service interruption and delays occur due to resource reconfiguration
Solution Approach 1:
The patent ensures continuous sidelink communication by configuring resources that remain valid across cell boundaries. The terminal group maintains uninterrupted communication using the same pre-configured sidelink resources during handover, eliminating service interruption and delays that would otherwise occur during resource reconfiguration.
3Ease of manufacture
If separate sidelink resources are allocated for different cells, then resource allocation is simplified for each cell, but resource utilization efficiency decreases due to lack of sharing
Solution Approach 1:
The patent implements universal sidelink resource allocation where the same resource pool is configured to be valid across multiple cells simultaneously. This allows the resource to serve multiple cells and terminal groups, significantly improving resource utilization efficiency while maintaining allocation simplicity through centralized base station control.
Data Source
AI summary
A first base station determines that a first terminal in a first cell is handed over to a second cell, where the first terminal belongs to a group of terminals, and the first cell belongs to the first base station. The first base station sends first information to the first terminal, where the first information indicates a first sidelink resource used by the group of terminals to perform communication, and the first sidelink resource is valid in both the first cell and the second cell. The foregoing technical solution resolves a problem that is of communications resource configuration of a group of terminals and that exists when the group of terminals perform handover.