Communication Resource Allocation for Interference Management
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Solution Overview
Problem
In next-generation communication systems, particularly in multi-cell BWA systems like IEEE 802.16a/d and IEEE 802.16e, inter-cell interference significantly reduces the Carrier-to-Interference and Noise Ratio (CINR) for Mobile Stations (MS) located at cell boundaries, hindering system performance due to independent resource allocation by Base Stations (BS) and the need for accurate interference signal removal.
Innovation Solution
A resource allocation method and system that divide data transmission regions into non-interference and interference regions, allowing Base Stations to allocate resources based on feedback information from Mobile Stations, enabling efficient interference region identification and resource allocation to mitigate inter-cell interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency reuse factor of 1 is used to facilitate efficient utilization of frequency resources, then frequency resource utilization is improved, but inter-cell interference increases causing CINR decrease for MS at cell boundaries
Solution Approach 1:
The patent segments the data transmission region into first and second regions based on interference characteristics. The first region is allocated to MS in non-interference areas while the second region is allocated to MS in interference areas (cell boundaries). This spatial segmentation allows different resource allocation strategies for different zones, resolving the contradiction between frequency reuse efficiency and inter-cell interference.
Solution Approach 2:
The patent applies local quality by differentiating resource allocation based on the local interference environment of MS. MS located in interference regions receive resources from the second region with tailored allocation parameters, while MS in non-interference regions receive resources from the first region. This localized approach allows optimization of both frequency utilization and interference management in different spatial contexts.
2Object-affected harmful factors
If interference remover is used to remove interference signals, then interference removal capability is improved, but signal restoration accuracy decreases leading to poor system performance
Solution Approach 1:
The patent performs preliminary resource region division and allocation before data transmission occurs. By pre-identifying which MS are located in interference regions and assigning them specific resource regions in advance, the system prevents interference issues from arising during transmission, eliminating the need for post-transmission interference removal and signal restoration operations.
Solution Approach 2:
Instead of treating interference as a problem to be removed after transmission, the patent converts the interference region information into a beneficial resource allocation parameter. The knowledge of which MS experience interference is used to proactively assign appropriate resource regions, transforming the harmful interference characteristic into a useful guiding factor for resource distribution.
Data Source
AI summary
A method for allocating resource in a communication system. The resource allocation method includes dividing a data transmission region into a first region and a second region; allocating resource of the first region when a first Mobile Station (MS) among MSs is an MS located in a non-interference region; and allocating resource of the second region when a second MS among the MSs is an MS located in an interference region.