Dynamic channel assignment (DCA) method for large-scale mobile cellular communications system

Abstract

The invention relates to a dynamic channel assignment (DCA) method for a large-scale mobile cellular communications system, belonging to the technical field of mobile communication. In the method, a large-dimension cellular net is divided into a plurality of small-dimension cellular subnets (DCSs), and each cellular subnet is provided with an independent cellular subnet control center; and meanwhile, each cellular subnet is provided with a real-time interference channel table. Compared with the traditional DCA method, the DCA method provided by the invention has the advantages that the huge DCA calculated amount of the whole large-dimensional cellular net is shared by each cellular subnet, thus, within unit time, times for each cellular subnet to operate a DCA program can be greatly reduced; and the control center of each cellular subnet can not be overloaded. Meanwhile, because the channel reassignment times can be greatly reduced, the signalling cost of the whole cellular net can be also greatly lowered, the communication link delay is reduced, and the real-time requirement of mobile user communication is guaranteed.

Description

Technical field: [0001] The invention relates to a dynamic channel allocation method of a large-scale cellular mobile communication system, which belongs to the technical field of mobile communication. Background technique: [0002] The dynamic channel allocation (DCA) of the cellular mobile communication system (also known as the cellular network) refers to dynamically assigning channels to each cell according to the real-time communication load (number of users and communication rate) of each cell among cells. Allocate the required number of channels to adapt to the time-varying communication load of each cell, improve user service quality, and improve spectrum utilization of the entire cellular network. [0003] The existing DCA methods at home and abroad only consider small-scale cellular networks, and the maximum number of cells considered does not exceed 64, while the actual cellular networks are large-scale, with tens of thousands of cells. Therefore, in order to mak...

AI Technical Summary

Problems solved by technology

If the scale of the cellular network is too large, there will be continuous arrival of new calls in each cell, triggering continuous DCA operation, which will also lead to continuous channel re-allocation, which will make many mobile users in communication, constantly Switching from one channel to another, such over-frequent channel reassignment, not only requires a large amount of network signaling overhead, but also brings delays in wireless communication links, which seriously affects the real-time requirements of mobile communications.

It can be seen that the existing DCA method cannot be applied to the actual large-scale cellular network

Images