Interference Coordination via Beam Resource Staggering
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Solution Overview
Problem
Current interference coordination mechanisms in wireless communication systems, such as LTE-A CoMP, require frequent reporting of Precoding Matrix Indicators (PMIs) by User Equipment (UE), leading to increased uplink overhead, which hampers system efficiency.
Innovation Solution
A method and device for interference coordination that determine mutual interference beams between cells of different base stations based on interference information and coordinate time-frequency or frequency domain resources to reduce interference without increasing uplink overhead, by sending beams on different resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the best/worst precoding matrix mechanism requires the UE to report PMIs of the adjacent cells, then the interference coordination can be achieved, but the uplink overhead will greatly increase
Solution Approach 1:
The patent extracts only the necessary interference information from the UE reports - specifically the cell IDs of adjacent cells that cause strong interference - rather than requiring full PMI reports. This selective extraction achieves interference coordination while minimizing uplink overhead by transmitting only essential identification data.
Solution Approach 2:
Instead of having the UE report detailed PMI information about all adjacent cells, the patent inverts the approach by having the network identify interference relationships based on simplified UE measurements, then coordinate resources proactively. This reverses the traditional reporting direction and reduces overhead significantly.
2Reliability
If the UE performs cell searching on adjacent cells and reports PMIs frequently, then the interference coordination can be maintained, but the uplink signaling load increases
Solution Approach 1:
The patent extracts only the critical element for interference coordination - the cell ID of interfering adjacent cells - from the UE's measurement data. This selective reporting maintains interference coordination reliability while dramatically reducing uplink signaling load compared to full PMI reporting.
Solution Approach 2:
The patent changes the reporting parameter from detailed PMI information to simplified cell ID identification. This parameter transformation maintains the essential interference coordination function while reducing the complexity and volume of uplink signaling required.
Data Source
AI summary
The present invention provides a method and a device for interference coordination. The method comprises: determining mutually interfering wave beams between a cell of a first base station and a cell of a second base station based on first interference information and second interference information; coordinating time-frequency resources, time domain resources or frequency domain resources occupied when the mutually interfering wave beams between the cell of the first base station and the cell of the second base station are sent, so as to reduce interference. By coordinating, wave beams of the cells of the base stations are sent in a staggered manner in terms of the time-frequency resources, the time domain resources or the frequency domain resources.