Inter-UE CLI Measurement Reference Signals for Interference Mitigation
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Solution Overview
Problem
Current wireless communication systems face challenges in mitigating inter-user-equipment (UE) cross-link interference (CLI), which affects the performance and efficiency of communication networks, particularly in scenarios involving device-to-device communication and advanced radio access technologies like 5G New Radio (NR).
Innovation Solution
The implementation of an apparatus and method that involves transmitting inter-UE CLI measurement reference signals between user equipment (UE) and network nodes, allowing for coordinated scheduling and interference mitigation through the use of CLI configurations and measurements, enabling effective reduction of CLI by adjusting transmission parameters and beam settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If device-to-device communication is implemented to enhance network capacity and coverage, then communication efficiency is improved, but inter-UE cross-link interference increases
Solution Approach 1:
The patent applies preliminary action by having UEs transmit CLI measurement reference signals before actual data communication occurs. This allows the network to measure and characterize interference conditions in advance, enabling proactive scheduling decisions and interference mitigation strategies to be implemented before harmful interference affects communication quality.
Solution Approach 2:
The patent implements feedback mechanisms where UEs measure CLI reference signals and report measurements to the network node. The network uses this feedback information to adjust scheduling decisions, power levels, and beam directions, creating a closed-loop system that continuously optimizes communication while mitigating inter-UE interference.
2Reliability
If transmission power is increased to improve signal coverage and reliability, then communication reliability is improved, but harmful interference to other UEs increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission power levels based on measured CLI conditions. The network modifies power parameters in response to interference measurements, reducing power when interference is detected and increasing power when signal strength is insufficient, thereby optimizing the reliability-interference trade-off.
Solution Approach 2:
The patent implements dynamic power control where transmission parameters are continuously adjusted based on real-time interference measurements. This dynamic adaptation allows the system to respond to changing channel conditions and interference levels, optimizing communication reliability while minimizing harmful interference to other UEs.
3Productivity
If scheduling flexibility is increased to improve resource utilization, then network performance is improved, but interference management complexity increases
Solution Approach 1:
The patent applies preliminary action by performing interference measurements and characterizations before final scheduling decisions are made. This advance preparation provides the network with essential information about interference conditions, simplifying the scheduling process and enabling more flexible resource allocation without excessive complexity in interference management.
Solution Approach 2:
The patent uses CLI measurement reference signals as an intermediary mechanism that simplifies interference management. These reference signals serve as a mediator between UEs and the network, providing standardized measurement data that facilitates coordinated scheduling decisions and reduces the complexity of managing flexible resources under interference constraints.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, from a first network node associated with the first UE, a cross-link interference (CLI) configuration. The first UE may transmit, to a second UE, an inter-UE CLI measurement reference signal based at least in part on the CLI configuration, a measurement associated with the inter-UE CLI measurement reference signal being signaled to the first network node. Numerous other aspects are described.