Trunking Channel Resource Allocation Modes for Base Station Controllers
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Solution Overview
Problem
Current trunking communication systems allocate radio resources using a single mode across all cells served by a Base Station Controller (BSC), failing to meet the varying demands of cells with different subscriber distribution frequencies, leading to inefficient resource utilization.
Innovation Solution
A method and system where a Mobile Switching Center (MSC) categorizes cells by their resource allocation modes and sends these modes to the BSC, allowing the BSC to allocate channel resources according to specific modes, enabling differential resource allocation based on cell needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single radio resources allocation mode is used for all cells served by a BSC, then the system is simple to operate and control, but it cannot meet the varying demands of cells with different subscriber distribution frequencies, leading to inefficient resource utilization
Solution Approach 1:
The patent segments the group of cells served by a BSC into multiple subsets, where each subset is assigned a specific radio resources allocation mode. The MSC divides cells into different groups based on their characteristics (e.g., high frequency subscriber appearance vs. low frequency), and sends separate ASSIGNMENT REQUIREMENT IEs for each subset to the BSC. This allows different allocation modes (immediate allocation, delayed allocation, etc.) to be applied to different cell groups, improving adaptability while maintaining manageable complexity through structured segmentation.
Solution Approach 2:
The patent applies local quality by allowing different radio resources allocation modes to be applied to different cells or cell groups based on their specific characteristics. Instead of a uniform allocation mode across all cells, each cell or cell group receives a tailored allocation mode suited to its subscriber distribution frequency and traffic patterns. This enables optimal resource allocation locally in each cell while maintaining overall system coordination through the MSC.
2Speed
If radio resources are allocated immediately to all cells, then the response time is fast for high-frequency cells, but radio resources are wasted in low-frequency cells where delayed allocation would suffice
Solution Approach 1:
The patent implements dynamic resource allocation by allowing the BSC to switch between different allocation modes for different cell groups based on real-time conditions. For cells with high subscriber appearance frequency, immediate allocation mode is applied to ensure fast response. For cells with low frequency, delayed allocation mode is used to postpone resource allocation until actually needed, reducing waste. The MSC dynamically manages these different modes through separate ASSIGNMENT REQUIREMENT IEs for different cell subsets.
3Loss of information
If the MSC sends assignment requirements for all cells in one message, then the signaling overhead is reduced, but the message size exceeds the limit when many cells are involved
Solution Approach 1:
The patent segments the list of cells and corresponding ASSIGNMENT REQUIREMENT IEs into multiple separate messages when the total number of cells exceeds the capacity of a single message. The MSC sends multiple VGCS/VBS ASSIGNMENT REQUEST messages, each containing a subset of cells and their allocation modes. This approach reduces the size of individual messages to fit within protocol limits while maintaining complete coverage of all cells through multiple transmitted segments.
Data Source
Figure 1~2
AI summary
A method for allocating channel resources includes: determining, by a Mobile Switching Center, a plurality of resources allocation modes for cells served by a Base Station Controller, sending the resources allocation modes to the Base Station Controller; and allocating, by the Base Station Controller, channel resources to the cells according to the resources allocation modes. A system and device for allocating channel resources are also disclosed. With the solution disclosed by the embodiments of the present invention, the Base Station Controller can allocate resources to cells employing different resources allocation modes according to their respective resources allocation modes. Therefore, the resources are utilized properly when the Quality of Service is guaranteed, and the problem that the cells in the same Base Station Controller employing a single resources allocation mode in the case of A-interface link sharing is overcome. Furthermore, the solution has good compatibility with the exiting A-interface sharing method.