Dynamic Radio Resource Muting for Interference Mitigation
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively mitigating inter-cell interference due to the lack of coordinated radio resource management and scheduling, particularly in densely deployed networks, which affects spectral efficiency and energy usage.
Innovation Solution
A method where user nodes measure and rank the received signal strength and interference from multiple network nodes, signaling this information to network nodes to enable coordinated scheduling and muting of radio resources, thereby improving interference mitigation and spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If time domain ICIC with ABS patterns is used to mitigate interference, then interference at cell-edge users is reduced, but spectral efficiency deteriorates due to resource muting
Solution Approach 1:
The patent applies dynamics by transitioning from static ABS patterns to dynamic resource muting decisions. The eNodeB continuously receives interference indication information from victim eNodeBs and adjusts the muting of aggressor cell resources in real-time based on current interference conditions, allowing the system to adaptively optimize both interference mitigation and spectral efficiency
Solution Approach 2:
The patent implements feedback mechanisms where victim eNodeBs monitor interference levels and send interference indication information back to aggressor eNodeBs. This feedback loop enables the aggressor eNodeB to make informed muting decisions, dynamically adjusting resource allocation based on actual interference impact on victim cell users
2Object-affected harmful factors
If coordinated radio resource management is implemented, then interference mitigation improves, but system complexity increases
Solution Approach 1:
The patent introduces an intermediary feedback mechanism where victim eNodeBs act as mediators by monitoring interference and reporting to aggressor eNodeBs. This intermediary approach simplifies coordination by using existing backhaul interfaces (X2 interface) rather than requiring complex direct coordination protocols between all network nodes
Solution Approach 2:
The system applies self-service by enabling each eNodeB to independently make muting decisions based on interference indication information received from victims. Each aggressor eNodeB autonomously manages its own resource muting without requiring centralized control, reducing overall system complexity while achieving coordinated interference mitigation
Data Source
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AI summary
The present invention relates to a Method for scheduling and/or muting radio resources in a wireless communication system, said wireless communication system comprising a plurality of network nodes and a plurality of user nodes; the method comprising the steps of: measuring, by at least one user node, received signal strength of radio signals transmitted from one or more network nodes so as to obtain received signal quality and/or interference associated with said one or more network nodes; arranging, by said user node, the received signal quality and/or interference associated with said one or more network nodes in an order or a ranking with respect to at least one radio signal criterion; signalling, by said user node, said order or ranking to at least one network node; and scheduling and/or muting radio resources based on said signalled order or ranking. Furthermore, the invention also relates to a method in a user node, a method in a network node, corresponding user node and network node devices, a computer program, and a computer program product thereof.