Dynamic Noise-Rise Threshold for LTE Uplink Interference Detection
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Solution Overview
Problem
Current LTE communication systems face challenges in detecting external uplink interference, which can cause data corruption and throughput degradation due to interference from sources like broadcast television and malicious radio jamming, and existing methods are not always effective in identifying and mitigating this interference.
Innovation Solution
A method and system for detecting external uplink interference in a cellular network by identifying neighbor cells, estimating noise-rise contributions, generating a dynamic noise-rise threshold, and alerting when the noise-rise measurement exceeds this threshold, using a management system with a transceiver, memory, and processor to analyze performance indicators and cell data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed noise threshold is used for interference detection, then the detection method is simple, but false alerts increase when neighbor cell loading varies
Solution Approach 1:
The patent implements dynamic threshold adjustment by continuously monitoring neighbor cell loading conditions and adapting the noise threshold accordingly. The threshold is no longer fixed but varies based on real-time network conditions, specifically the loading status of neighboring cells, which allows the system to maintain high detection accuracy across different operational scenarios without requiring complex manual configuration.
Solution Approach 2:
The system employs feedback mechanisms where detection results and network performance metrics are continuously monitored and fed back to adjust the noise threshold. This closed-loop approach allows the system to learn from past detection outcomes and optimize threshold settings dynamically, reducing false alerts while maintaining sensitivity to actual interference conditions.
2Reliability
If external interference detection is implemented, then data integrity improves, but system complexity increases
Solution Approach 1:
The patent introduces intermediary components such as noise measurement units and threshold calculation modules that act as mediators between the raw signal data and the interference detection decision. These intermediaries process and filter the data in a structured manner, breaking down the complex detection task into manageable stages while maintaining overall system reliability and data integrity.
3Reliability
If noise-rise threshold is dynamically adjusted based on neighbor cell loading, then false alerts are reduced, but calculation complexity increases
Solution Approach 1:
The system changes the parameter basis for threshold determination from fixed values to dynamic parameters based on neighbor cell loading conditions. By monitoring loading metrics such as resource block utilization and adjusting the noise threshold accordingly, the system achieves higher alert accuracy while the increased calculation complexity is managed through efficient parameter tracking and update mechanisms.
Data Source
AI summary
A method and apparatus for detecting external interference on an uplink channel of a serving cell in a communication network, such as a Long Term Evolution (LTE) network. Detecting external interference includes identifying neighbor cells of the serving cell and obtaining neighbor cell data associated with each neighbor cell. For each neighbor cell, a processor estimates a noise-rise contribution resulting from communication between the neighbor cell and user equipment based on the neighbor cell data. The processor generates a noise-rise threshold for the serving cell based on the noise-rise contributions estimated for the neighbor cells. Thereafter, the processor obtains a noise-rise measurement at the serving cell and generates an alert indicating external interference when the noise-rise measurement exceeds the noise-rise threshold.