Sidelink Resource Configuration in Conditional Handover
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Solution Overview
Problem
Current wireless communication systems, particularly 5G NR, face challenges in optimizing sidelink operations for efficient resource management and handover processes in cellular networks.
Innovation Solution
A method for a user equipment (UE) in a cellular wireless communication network that involves receiving a conditional handover command from a first cell, performing handover to a second cell based on fulfilled triggering conditions, and applying a stored sidelink resource configuration after the handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional handover procedures are used in 5G NR systems, then network coverage is maintained, but sidelink operation efficiency and resource management performance deteriorate due to additional latency and lack of optimization
Solution Approach 1:
The patent applies preliminary action by pre-configuring sidelink resource pools and parameters before handover occurs. The target cell is pre-configured with sidelink resource pool parameters, and the UE stores necessary configuration information in advance, enabling rapid application of optimized resource configurations immediately after handover without additional signaling delays
Solution Approach 2:
The patent uses copying by transferring stored sidelink resource configuration parameters from the source cell to the target cell during handover. The UE copies relevant configuration information (such as resource pool parameters, timing information, and spatial relations) to maintain continuous operation and avoid service interruption
2Productivity
If dynamic resource allocation is implemented, then resource utilization is optimized, but system complexity and configuration overhead increase
Solution Approach 1:
The patent applies segmentation by dividing the resource allocation into different types: pre-configured resource pools for general use and dynamic resource pools for specific conditions. This segmentation allows the system to balance between pre-planned efficiency and dynamic adaptability, reducing overall complexity by not requiring full dynamic allocation for all scenarios
Solution Approach 2:
The patent uses parameter changes by modifying resource pool parameters dynamically based on channel conditions and handover requirements. The system changes parameters such as resource pool activation status, timing offsets, and spatial relations according to actual network conditions, achieving optimized resource utilization without requiring complete system reconfiguration
Data Source
AI summary
A method for sidelink operation performed by a user equipment (UE) is provided. The method includes receiving, from a first cell, a conditional handover command that includes an indication of a second cell and one or more triggering conditions for handover to the second cell, performing handover to the second cell after determining that at least one of the triggering conditions is fulfilled, and applying a sidelink resource configuration that is stored in the UE after performing handover to the second cell based on the conditional handover command.