Mobile Station-Assisted Interference Mitigation in Heterogeneous Networks
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Solution Overview
Problem
In heterogeneous wireless networks, the increased number of access points due to smaller cells leads to significant coverage overlap, resulting in unacceptable levels of interference that negate the benefits of improved signal levels, as current systems lack mechanisms for direct communication and real-time cooperation between access points.
Innovation Solution
A mobile station communicates interference mitigation data between access points, processing resource claims to assign radio resources that minimize conflicts, adjust transmit power levels, and defer transmissions to mitigate interference, enabling dynamic radio resource allocation across neighboring cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If smaller cells are deployed to increase network capacity, then signal level is improved, but interference level increases due to coverage overlap
Solution Approach 1:
The mobile station serves as an intermediary between access points, relaying resource claim information from one access point to another. This enables indirect coordination between access points that cannot communicate directly, allowing them to adjust their resource allocation to minimize interference while maintaining improved signal levels from smaller cells
Solution Approach 2:
The system implements feedback loops where mobile stations monitor interference conditions and relay information about resource claims and coverage overlap to access points. Access points then adjust their transmit power and resource allocation based on this feedback, dynamically optimizing the balance between signal level and interference level
2Productivity
If more access points are added to a cellular system, then network capacity increases, but coordination difficulty increases due to lack of global view
Solution Approach 1:
Each access point independently manages its own resource allocation by processing resource claims received from mobile stations. The system enables decentralized self-organization where access points autonomously adjust their configurations based on local information about coverage overlap and interference, eliminating the need for complex centralized coordination
Solution Approach 2:
Mobile stations act as intermediaries that collect resource claim information from multiple access points and relay it back to those access points. This intermediary mechanism enables distributed coordination across the network, allowing access points to make informed decisions about resource allocation without requiring a centralized controller with a global view
Data Source
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AI summary
Devices and methods are provided for using a mobile station to mitigate interference between wireless access points. A mobile station communicates interference mitigation data corresponding to a first and second set of radio resources between a first and second wireless access point (AP). The interference mitigation data is processed by the first wireless AP to resolve conflicts in the claiming, and subsequent assignment, of the first and second radio resource assignments to the mobile station.