Inter-Cell Interference Reduction via Buffer Resource Allocation
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Solution Overview
Problem
In radio communications systems, inter-cell interference occurs due to independent resource allocation in neighboring cells, leading to delayed communication setups and increased interference, particularly during high-speed uplink data transmissions.
Innovation Solution
Implement a method where each cell sets buffer resources corresponding to control resources used in neighboring cells, reducing interference by avoiding allocation of these buffer resources to UL-SCH transmissions and allowing their use for low-interference scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each base station individually allocates uplink resources to RACH and UL-SCH independently, then resource allocation flexibility and ease of operation are improved, but inter-cell interference increases and reliability deteriorates
Solution Approach 1:
The patent merges resource allocation decisions between neighboring base stations by establishing coordination mechanisms. Specifically, base stations exchange resource allocation information and jointly determine RACH and UL-SCH resource positions to avoid conflicts, transforming independent allocation into coordinated allocation that reduces inter-cell interference while maintaining operational flexibility
Solution Approach 2:
The patent introduces an intermediary coordination mechanism where base stations communicate through a standardized interface to exchange resource allocation information. This intermediary communication layer enables cooperative decision-making without requiring direct complex interactions, resolving the contradiction between independent operation and coordinated interference management
2Speed
If RACH resources are periodically allocated to enable mobile stations to access base stations without delay, then access speed is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring periodic RACH resource patterns and buffer resources before actual communication occurs. Base stations establish predetermined resource allocation schemes that automatically guide mobile stations through the access process, reducing real-time decision complexity while maintaining fast access speeds
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting RACH resource periodicity and buffer resource positions based on traffic conditions and interference levels. This allows the system to optimize access speed while managing complexity through adaptive parameter tuning rather than fixed complex allocation rules
3Reliability
If buffer resources are set in resource areas corresponding to neighboring cell control resources, then inter-cell interference is reduced, but resource utilization efficiency decreases
Solution Approach 1:
The patent applies local quality by creating buffer resources with specialized properties in specific resource areas that correspond to neighboring cell control resources. These localized buffer regions have different allocation rules than general data resources, providing targeted interference protection where needed while maintaining efficient resource utilization in other areas
Solution Approach 2:
The patent implements dynamics by making buffer resource allocation adaptive rather than static. Base stations dynamically adjust buffer resource positions and sizes based on actual interference conditions, traffic patterns, and neighboring cell configurations, optimizing the balance between interference reduction and resource utilization efficiency in real-time
Data Source
AI summary
A resource allocation control method and device that can reduce inter-cell interference in a radio communications system are provided. According to a method for resource allocation control between a plurality of cells in a radio communications system, radio communication devices respectively controlling at least two cells notify information about control resources of its own cell to each other. In the resources of its own cell, each of the radio communication devices sets a buffer resource within a predetermined resource range corresponding to a control resource of the other cell. At a request for information transmission in its own cell, each of the radio communication devices restricts the allocation of the set buffer resource.