Inter-System Neighbor Cell Interference Elimination via Dynamic Feedback
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Solution Overview
Problem
The coexistence of cellular network systems and wireless local area networks (WLANs) often results in neighbor cell interference due to adjacent frequency bands, leading to reduced communication quality and increased power consumption.
Innovation Solution
A method and device that detect neighbor cell interference by receiving interference indications from terminals and execute strategies such as reducing transmitting power or adjusting frequency bands to mitigate interference between wireless communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency bands of cellular network system and WLAN system are adjacent to enable coexistence, then spectrum utilization is improved, but neighbor cell interference occurs between the two systems
Solution Approach 1:
The patent implements a feedback mechanism where terminals detect interference levels and send interference indications to their serving access devices. The access devices then exchange interference information with neighboring systems and adjust transmission parameters accordingly. This closed-loop feedback enables dynamic adaptation to interference conditions while maintaining adjacent frequency band operation.
Solution Approach 2:
The patent changes transmission parameters (power levels, frequency offsets, timing advances) based on detected interference conditions. When interference is detected, the system dynamically adjusts these parameters to mitigate the harmful effects while maintaining communication quality, enabling coexistence on adjacent frequency bands.
2Reliability
If transmitting power is increased to improve communication quality, then signal strength is improved, but interference to neighboring systems increases
Solution Approach 1:
The patent dynamically adjusts transmission power based on detected interference conditions. When a terminal or access device detects that its transmission is causing interference to neighboring systems, it reduces power levels accordingly. This enables maintenance of adequate communication quality while minimizing harmful interference to adjacent frequency bands.
Solution Approach 2:
The system uses feedback from interference detections to control transmission power levels. Terminals and access devices monitor interference levels and adjust their power accordingly, creating a self-regulating mechanism that balances communication quality with interference mitigation.
3Object-affected harmful factors
If frequency bands are adjusted to eliminate interference, then neighbor cell interference is reduced, but system complexity increases
Solution Approach 1:
The patent enables terminals to autonomously detect interference and initiate compensation actions. Terminals can detect interference from neighboring systems, calculate appropriate frequency offsets or power adjustments, and implement corrections without requiring complex centralized control. This self-service approach reduces overall system complexity while effectively mitigating interference.
Solution Approach 2:
The patent divides the interference mitigation function into separate, manageable components: interference detection by terminals, information reporting to access devices, coordination between access devices, and parameter adjustment. This segmentation allows each component to be implemented independently with manageable complexity.
Data Source
AI summary
The present disclosure provides a method and a device for eliminating inter-system neighbor cell interference. The method includes the following steps: receiving, by a first wireless access device, a first interference indication, where the first interference indication is sent by a first terminal when the first terminal detects that neighbor cell interference caused by a second terminal to the first terminal is greater than or equal to a preset threshold, the first interference indication is used for indicating that the first terminal suffers the neighbor cell interference; sending, by the first wireless access device, a decreasing interference indication to a second wireless access device corresponding to the second terminal when determining that the first terminal suffers the neighbor cell interference from the second terminal, so that the second wireless access device executes a decreasing interference strategy to eliminate neighbor cell interference between the first terminal and the second terminal.