RIM Reference Signal Configuration for TDD Interference Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Commercial Long Term Evolution (LTE) Time Division Duplex (TDD) networks experience intermittent deterioration in Interference-Over-Thermal (I-o-T) at Radio Access Network (RAN) nodes due to atmospheric ducting, affecting network coverage and connection rates, particularly from remote RAN nodes causing downlink signaling interference.
Innovation Solution
The implementation of Remote Interference Management (RIM) techniques using RIM-Reference Signals (RIM-RS) to assist RAN nodes in identifying aggressors, with configuration details including time-location of transmission, periodicity, and time-domain repetition, to mitigate interference by reconfiguring guard periods and other parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RIM-RS transmission periodicity is increased to reduce interference, then network coverage and connection rates improve, but detection sensitivity and response time deteriorate
Solution Approach 1:
The patent implements periodic transmission of RIM-RS signals at configurable intervals to enable interference detection and mitigation. The periodic action allows the system to balance between detection sensitivity and network performance by adjusting the transmission period, ensuring that interference is detected and addressed without excessively impacting normal network operations.
Solution Approach 2:
The system dynamically adjusts the RIM-RS transmission periodicity based on detected interference conditions and network state. When interference is detected, the system can increase transmission frequency for better detection; when network conditions are stable, it can reduce frequency to minimize impact on coverage and connection rates, thus resolving the contradiction between detection sensitivity and network performance.
2Measurement precision
If RIM-RS transmission frequency is increased to improve detection performance, then interference identification accuracy improves, but network resource consumption worsens
Solution Approach 1:
The patent employs configurable transmission parameters including periodicity, time location, and repetition patterns that can be adjusted based on network conditions. By changing these parameters dynamically, the system optimizes the balance between interference detection accuracy and network resource consumption, transmitting RIM-RS only when and where needed rather than continuously.
Solution Approach 2:
The system implements partial transmission of RIM-RS signals based on detected interference conditions and network state. Rather than continuous full-power transmission, the system applies partial action by transmitting only when interference is detected or network conditions require it, reducing overall resource consumption while maintaining sufficient detection accuracy when needed.
3Object-affected harmful factors
If guard period is reconfigured to mitigate interference, then remote interference is reduced, but network coverage and connection rates may deteriorate
Solution Approach 1:
The system implements feedback mechanisms where RAN nodes monitor interference conditions and network performance, then adjust guard period configurations accordingly. The feedback loop allows the system to learn from the impact of guard period changes on coverage and connection rates, making iterative adjustments that mitigate interference while preserving network performance.
Solution Approach 2:
The guard period configuration is made dynamic rather than static, allowing real-time adjustment based on detected interference patterns and network conditions. The system can extend guard periods when remote interference is detected and reduce them when network coverage and connection rates are compromised, thus resolving the contradiction between interference mitigation and network performance.
Data Source
AI summary
Systems, apparatuses, methods, and computer-readable media are provided for remote interference management (RIM) in wireless networks, including RIM reference signals (RIM-RS) transmitted to assist victim radio access network (RAN) nodes to identify aggressor RAN nodes due to, for example, atmospheric ducting. The RIM-RS is also flexibly configured. Other embodiments may be described and/or claimed.