Layer 2 Packet Measurement Across the MN-SN Interface
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Solution Overview
Problem
Current Layer 2 measurement methods in 5G systems do not support reliable measurement for MN-terminated SCG and SN-terminated MCG bearers due to the lack of measurement on the interface between the master and secondary nodes.
Innovation Solution
A Layer 2 measurement method and device that measure the Layer 2 measurement object of packets transmitted through the interface between the master and secondary nodes, specifically for MN-terminated SCG and SN-terminated MCG bearers, providing measurement information for packet delay, throughput, and packet loss rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current Layer 2 measurement methods are used, then measurement simplicity is maintained, but measurement reliability is insufficient for MN-terminated SCG and SN-terminated MCG bearers
Solution Approach 1:
The measurement process is segmented into distinct components: obtaining measurement information from multiple sources (gNB, UE, core network), measuring specific Layer 2 parameters (packet delay, throughput, packet loss rate) separately, and then integrating these measurements to form comprehensive reliability assessment. This segmentation allows each measurement component to be optimized independently while maintaining overall measurement reliability.
Solution Approach 2:
The patent introduces intermediate measurement entities and protocols that facilitate reliable measurement between the gNB and UE. Measurement information is obtained through intermediary communication channels and processed through intermediate calculation steps, enabling accurate measurement of interface packet characteristics without requiring direct end-to-end measurement that would increase complexity.
2Measurement precision
If measurement of interface packets is implemented, then measurement precision is improved, but measurement complexity increases
Solution Approach 1:
Measurement information is obtained in advance from multiple sources including the gNB, UE, and core network before final measurement calculation. Packet delay, throughput, and loss rate parameters are pre-collected and pre-processed, allowing the actual measurement to be performed with higher precision using already-available data rather than requiring complex real-time measurement infrastructure.
Solution Approach 2:
The measurement system is designed to measure multiple Layer 2 parameters (packet delay, throughput, packet loss rate) using a unified measurement framework. This multi-functional approach allows the same measurement infrastructure to serve multiple measurement objectives, reducing overall system complexity while maintaining high measurement precision across different parameter types.
Data Source
AI summary
A Layer 2 measurement method, a network side device, and a non-transitory computer-readable storage medium, are provided. The Layer 2 measurement method, performed by a network side device, includes: obtaining a Layer 2 DownLink (DL) packet delay or a Layer 2 UpLink (UL) packet delay. Each of the Layer 2 DL packet delay and the Layer 2 UL packet delay includes: a packet delay of a packet transmitted through an interface between a Master Node (MN) and a Secondary Node (SN).