Network Device CLI Management Through Reference-Signal Feedback
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Solution Overview
Problem
Existing communication technologies lack a mechanism for effectively managing Cross Link Interference (CLI) in network devices operating in full-duplex mode, particularly when simultaneous uplink and downlink transmissions occur, leading to interference between different network devices and terminal devices.
Innovation Solution
Network devices measure CLI levels using CLI-Reference Signals (RS) and transmit indications to other devices for CLI elimination procedures, transitioning to TDD mode when necessary, and adjusting transmission schedules to prioritize high-priority services, using predefined or dynamically adjusted thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network devices operate in full-duplex mode to improve communication efficiency, then communication efficiency is improved, but Cross Link Interference occurs between simultaneous uplink and downlink transmissions
Solution Approach 1:
The patent dynamically adjusts transmission parameters including power levels, time slots, and frequency resources based on measured CLI levels. Network devices monitor CLI metrics and modify transmission parameters in real-time to eliminate interference while maintaining full-duplex operation efficiency.
Solution Approach 2:
The patent implements a feedback mechanism where network devices measure CLI levels from reference signals, report measurements to controlling network devices, and receive instructions for adjustment. This closed-loop feedback system enables continuous optimization of transmission parameters to maintain efficient full-duplex operation while eliminating harmful interference.
2Object-generated harmful factors
If CLI elimination procedures are implemented to reduce interference, then CLI level is reduced, but transmission scheduling complexity increases
Solution Approach 1:
The patent segments the network into hierarchical levels with controlling network devices that manage CLI elimination for multiple subordinate network devices. This segmentation distributes the complexity of CLI management across multiple controllers rather than requiring each device to independently manage all CLI relationships.
Solution Approach 2:
The patent performs preliminary CLI measurements and assessments before finalizing transmission schedules. Network devices measure CLI levels in advance using reference signals and report findings to controlling devices, which then determine appropriate scheduling adjustments before transmissions occur, simplifying real-time decision-making.
3Reliability
If high-priority services are prioritized during CLI elimination, then service reliability is improved, but overall network throughput may be reduced
Solution Approach 1:
The patent applies different CLI elimination strategies to different services based on their priority levels and quality requirements. High-priority services receive aggressive CLI elimination measures ensuring reliable delivery, while lower-priority services use more conservative approaches that minimize impact on overall network throughput, creating locally optimized quality characteristics.
Solution Approach 2:
The patent applies partial CLI elimination actions selectively to specific time slots, frequency resources, or service flows rather than uniformly across all transmissions. This allows the system to apply sufficient CLI elimination to protect high-priority services while using less aggressive measures for other transmissions, maintaining overall network efficiency.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for management of Cross Link Interference (CLI). According to embodiments of the present disclosure, a first network device measures a CLI level based on at least one CLI-Reference Signal (RS) received from a second network device. In response to the measured CLI level being above a first threshold level, the first network device transmits a first indication to the second network device. The first indication comprises service information associated with the CLI.