Wireless Device Source Cell Quality Reporting for 5G Handover
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Solution Overview
Problem
Current mobility management in 5G NR systems lacks effective control over source cell connectivity during handover, leading to suboptimal communication performance due to inadequate monitoring and control of communication quality between source and target cells.
Innovation Solution
A method where a wireless device reports the communication quality of the source node to the target node during mobility, enabling the target node to decide whether to maintain or terminate communication with the source node, thereby optimizing connectivity and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless device maintains communication with both source node and target node during mobility, then mobility performance is improved, but control over source cell connectivity becomes insufficient leading to suboptimal communication performance
Solution Approach 1:
The patent implements a feedback mechanism where the wireless device measures and reports source cell communication quality (e.g., RSRP, RSRQ, SINR) to the target node. This feedback enables the target node to make informed decisions about maintaining or releasing source cell connectivity, transforming the previous open-loop approach into a closed-loop control system that optimizes communication performance during handover.
2Reliability
If the target node has full control over source cell connectivity, then communication performance is optimized, but the complexity of mobility management increases
Solution Approach 1:
The patent enables the wireless device to autonomously measure source cell quality metrics and generate reports without requiring complex network-side measurement and control mechanisms. The device serves itself by performing local measurements and providing actionable feedback to the target node, simplifying the overall mobility management architecture while maintaining optimized communication performance.
3Reliability
If the wireless device reports source cell communication quality to the target node, then the target node can make informed decisions about source cell connectivity, but additional signaling overhead is introduced
Solution Approach 1:
The patent extracts only the essential communication quality metrics (such as RSRP, RSRQ, or SINR) from the full set of available measurements and reports only these critical parameters to the target node. This selective reporting approach provides the target node with sufficient information to make connectivity decisions while minimizing signaling overhead by excluding redundant or less critical measurement data.
Data Source
AI summary
A method and apparatus for an indication of serving cell communication quality to a target cell during mobility in a wireless communication system is provided. A wireless device, which keeps communicating with a source node while initiating a mobility from the source node to a target node, transmits, to the target node, information related to a communication quality of the source node.