5G NR Measurement Resource Segmentation for Interference Control
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Solution Overview
Problem
In the 5G NR system, rate matching resources overlap with measurement resources such as NZP CSI-RS and CSI-IM, causing interference and affecting measurement accuracy, especially for URLLC services requiring ultra-high reliability and low latency, leading to increased scheduling complexity and reduced flexibility.
Innovation Solution
A method for a terminal device to determine and measure resources excluding overlapping areas with interference sources, using configuration information or pre-emption indications to avoid interference, and a network device to manage resource allocation to prevent overlap, ensuring accurate CSI reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If rate matching resources are allocated for forward or backward compatibility, then system compatibility is improved, but measurement resource interference increases
Solution Approach 1:
The patent segments resources into measurement resources and rate matching resources, establishing clear separation rules. The terminal device determines a third resource by excluding overlapping resources between the first resource (measurement resource) and second resource (rate matching resource), thereby segmenting the resource space to avoid interference while maintaining both measurement accuracy and system compatibility.
2Productivity
If NZP CSI-RS resource overlaps with PDSCH resource carrying URLLC service data, then resource utilization is improved, but interference increases
Solution Approach 1:
The patent applies preliminary action by having the terminal device determine the third resource (measurement resource excluding overlapping resources) before performing measurement. The network device also determines the third resource in advance and sends measurement signals only on non-overlapping resources. This preliminary determination prevents interference before it occurs, ensuring both resource utilization and measurement accuracy.
3Measurement precision
If scheduling ensures no overlap between measurement resources and rate matching resources, then measurement accuracy is improved, but scheduling complexity increases
Solution Approach 1:
The patent implements self-service by enabling the terminal device to autonomously determine the third resource by excluding overlapping resources between measurement resources and rate matching resources. The terminal device performs the resource determination itself based on received configuration information, eliminating the need for complex network-side scheduling coordination and reducing overall system complexity while maintaining measurement accuracy.
4Adaptability or versatility
If CSI-IM resource overlaps with rate matching resource, then resource flexibility is improved, but interference measurement accuracy decreases
Solution Approach 1:
The patent segments the CSI-IM resource determination process by excluding overlapping resources between the CSI-IM resource and rate matching resource. The terminal device determines the third resource by removing overlapping portions, thereby segmenting the resource space to eliminate interference while preserving resource flexibility for both URLLC services and measurement operations.
Data Source
AI summary
Example measurement methods and apparatus are described. One example method includes receiving first information and second information from a network device by a terminal device. The terminal device determines a first resource based on the first information, and determines a second resource based on the second information. Further, the terminal device determines a third resource based on the first resource and the second resource, and performs measurement on the third resource. The third resource includes a part of or all resources in the first resource except a first overlapping resource, and the first overlapping resource is an overlapping resource of the first resource and the second resource.