Remote Interference Mitigation Reference Signal Configuration
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively mitigating remote interference caused by atmospheric ducting, which leads to severe interference issues affecting network coverage and connection rates in TD-LTE networks.
Innovation Solution
The proposed solution involves configuring resources, such as sequences and transmission parameters, for remote interference mitigation (RIM) reference signals (RS) by base stations or OAM entities to determine and mitigate interference, including using multiple RIM RS resources, repetition transmission, and conveying interference status information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If remote interference mitigation reference signals are transmitted to identify interference sources, then interference detection capability is improved, but network complexity and signaling overhead increase
Solution Approach 1:
The RIM reference signals serve multiple functions: they enable interference source identification, provide channel quality information, and support coordination between base stations. By making the reference signals multi-functional, the patent reduces the need for separate signaling mechanisms, thereby improving interference detection capability while limiting the increase in network complexity.
Solution Approach 2:
The system uses existing reference signal structures and transmission mechanisms to provide interference mitigation functionality. Rather than introducing completely new complex signaling protocols, the patent leverages existing signal structures to self-identify interference sources, thus improving detection capability while minimizing added complexity.
2Reliability
If multiple RIM RS resources and repetition transmission are used to accurately identify interference, then interference mitigation reliability is improved, but signaling overhead and transmission resources increase
Solution Approach 1:
The patent divides the interference mitigation process into multiple stages using different RIM RS resources and repetition transmissions. By segmenting the identification process across multiple resources, the system achieves higher reliability through redundant measurements while managing signaling overhead through structured resource allocation rather than uncontrolled repetition.
Solution Approach 2:
The patent employs periodic transmission of RIM reference signals with configured repetition factors. This periodic action allows the system to achieve reliable interference identification through multiple observations over time while controlling signaling overhead by using predictable, patterned transmissions rather than continuous or random signaling.
3Adaptability or versatility
If dynamic configuration of transmission parameters is implemented to adapt to interference conditions, then system adaptability is improved, but control complexity increases
Solution Approach 1:
The patent implements dynamic configuration of RIM RS transmission parameters including periodicity, bandwidth, and sequence selection based on detected interference conditions. This dynamic adaptation allows the system to respond to varying interference scenarios while control complexity is managed through pre-configured parameter sets and automated selection algorithms rather than manual configuration.
Solution Approach 2:
The system changes key transmission parameters such as RIM RS periodicity, bandwidth allocation, and sequence identifiers based on interference measurement results. By implementing parameter changes driven by automated feedback from interference detection, the system achieves high adaptability while controlling complexity through rule-based parameter selection rather than complex real-time optimization.
Data Source
AI summary
Techniques are described for configuring resources for remote interference mitigation (RIM). An example method includes configuring a first sequence for a reference signal (RS) in response to determining that the RS includes information indicative of a first type of status information. The method also includes configuring a second sequence for the RS in response to determining that the RS includes information indicative of a second type of status information, where the RS is transmitted in response to determining an interference and based on the configured first sequence or second sequence.