Cross Link Interference Measurement via SRS Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for measuring Cross Link Interference (CLI) in 5G mobile communication networks lack effective techniques for performing CLI measurement and signaling, which is crucial for managing interference between base stations and user equipment (UEs) due to varying UL/DL ratios, leading to potential interference issues.
Innovation Solution
A method involving the transmission of capability information related to downlink signal reception and Sounding Reference Signal (SRS) from a second device to a serving cell, allowing for CLI measurement based on the SRS, enabling base stations to receive and process CLI information from UEs to adjust UL/DL ratios and mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If flexible duplex scheduling is used to adjust UL/DL ratios according to traffic demands, then network capacity and resource utilization are improved, but interference between base stations and user equipment increases due to mismatched UL/DL configurations in adjacent cells
Solution Approach 1:
The patent implements a feedback mechanism where user equipment measures cross-link interference from SRS signals and reports CLI measurement results to the serving base station. The base station uses this feedback information to adjust UL/DL configurations and SRS transmission parameters, thereby reducing interference while maintaining flexible duplex scheduling benefits
Solution Approach 2:
The patent performs preliminary actions by configuring SRS resources and CLI measurement parameters in advance before interference occurs. The base station pre-configures SRS transmission resources for neighboring cells and sets up CLI measurement configurations for user equipment, enabling proactive interference management
2Reliability
If CLI measurement and signaling methods are not established, then system complexity remains low, but interference management capability is insufficient leading to degraded network performance
Solution Approach 1:
The patent enables user equipment to autonomously perform CLI measurements on SRS signals and self-report measurement results to the base station without requiring complex centralized control. This self-service approach improves interference management while keeping the system relatively simple
Solution Approach 2:
The patent uses existing SRS resources for multiple purposes: uplink channel estimation and cross-link interference measurement. This multi-functionality approach enables CLI measurement capability without requiring separate dedicated measurement resources, thereby limiting the increase in system complexity
Data Source
AI summary
One embodiment in the present specification provides a method of performing a measurement by a first device. The method may comprise: a step of transmitting, to a serving cell, capability information with regard to reception of a downlink signal transmitted from the serving cell and a sounding reference signal (SRS) transmitted from a second device; and a step of performing a cross link interference (CLI) measurement on the basis of the SRS from the second device.