Common Reference Signal Windows for Cross-Link Interference Measurement
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Solution Overview
Problem
Cross-link interference (CLI) occurs in 5G wireless systems due to simultaneous downlink and uplink transmissions between network entities, particularly in dynamic TDD and full-duplex configurations, which affects communication quality and efficiency.
Innovation Solution
A common window configuration is introduced for mobile network entities to facilitate CLI measurement by defining occasions within a window for transmitting and receiving reference signals, allowing network entities to measure CLI with neighbor entities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD and full-duplex configurations are used to adapt to traffic load, then network adaptability and resource utilization are improved, but cross-link interference between network entities increases
Solution Approach 1:
The patent applies preliminary action by configuring measurement windows and occasions in advance before cross-link interference occurs. The network entity receives a common window configuration that includes multiple occasions within a window for each cycle, allowing reference signals to be transmitted and received at predetermined times. This enables network entities to proactively measure CLI levels before interference degrades communication quality, and report these measurements to the central network entity for preemptive scheduling adjustments.
Solution Approach 2:
The patent implements feedback mechanisms where network entities continuously measure cross-link interference using reference signals transmitted during configured occasions, then report these measurements back to the central network entity. This feedback loop enables the central entity to monitor interference levels across the network and dynamically adjust uplink/downlink scheduling decisions to mitigate identified interference patterns while maintaining adaptability to traffic conditions.
2Measurement precision
If reference signals are transmitted frequently to measure CLI, then measurement precision is improved, but network overhead and resource consumption increase
Solution Approach 1:
The patent applies segmentation by dividing the measurement process into structured windows containing multiple discrete occasions within each cycle. Instead of continuous reference signal transmission, the common window configuration specifies particular time occasions where reference signals are transmitted. This segmented approach concentrates measurement resources into focused intervals, achieving sufficient measurement precision for CLI assessment while significantly reducing overall reference signal overhead compared to continuous transmission.
Solution Approach 2:
The patent implements partial action by transmitting reference signals only during specifically configured occasions within measurement windows rather than continuously. The common window configuration enables the network to use just enough reference signal transmissions to achieve adequate CLI measurement precision, avoiding excessive signal overhead. This partial measurement approach is sufficient for identifying interference patterns and enabling scheduling decisions without consuming excessive network resources.
Data Source
AI summary
Aspects of the present disclosure provide mechanisms for facilitating cross-link interference (CLI) measurement and reporting for mobile network entities using a common window configuration for communication of reference signals. The common window configuration may indicate a plurality of occasions within a respective window of each of one or more cycles for communicating one or more reference signals. A network entity (e.g., a mobile network entity or a stationary network entity) may utilize the common window configuration to receive a reference signal from another network entity within an occasion of the plurality of occasions in order to obtain a CLI measurement indicating the CLI between the network entities.