Network Power Feedback for Cross-Link Interference Mitigation
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Solution Overview
Problem
Inter-network-entity cross-link interference (CLI) in wireless communication systems degrades communication quality and increases latency, particularly in full duplex operations, due to excessive transmit power from neighboring network entities.
Innovation Solution
A first network entity measures CLI and provides a power adjustment recommendation to a second network entity, receiving a response or feedback rule, which allows for mitigating CLI by adjusting transmit power or altering communication strategies based on the response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If transmit power is increased to improve communication coverage and signal strength, then communication coverage is improved, but inter-network-entity cross-link interference increases
Solution Approach 1:
The patent implements a feedback mechanism where network entities measure CLI from reference signals and send power adjustment recommendations back to the transmitting entity. The transmitting entity responds with acknowledgment or alternative recommendations, creating a closed-loop control system that dynamically adjusts transmit power to maintain coverage while reducing interference.
Solution Approach 2:
The patent changes the transmit power parameter dynamically based on measured CLI conditions. Network entities adjust power levels by specific dB amounts (e.g., reducing by 3dB, 6dB, or 9dB) in response to interference measurements, allowing the system to adapt power parameters in real-time to balance coverage and interference reduction.
2Reliability
If CLI measurement and power adjustment procedures are implemented to reduce interference, then communication quality is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by implementing CLI mitigation only for specific network entities that cause or experience significant interference, rather than universally for all entities. The first network entity selectively sends power adjustment recommendations based on measured CLI levels, reducing signaling overhead while maintaining communication quality where needed.
3Object-affected harmful factors
If power adjustment recommendations are sent and responses are waited for to mitigate CLI, then interference reduction is achieved, but latency increases
Solution Approach 1:
The patent applies preliminary action by having network entities measure CLI using reference signals that are transmitted in advance of actual data communication. The power adjustment recommendations are prepared and sent beforehand, allowing the system to proactively mitigate interference before it degrades communication quality, rather than reacting after interference occurs.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network entity may receive measurement reference signals from a second network entity. The first network entity may measure cross-link interference (CLI) based at least in part on the measurement reference signals. The first network entity may transmit a recommendation for downlink transmit power adjustment of the second network entity, based at least in part on the CLI. The first network entity may communicate based at least in part on a response to the recommendation or a feedback rule for the recommendation. Numerous other aspects are described.