Dynamic channel allocation method facing OFDMA cellular network

Abstract

The invention provides a dynamic channel allocation method facing the OFDMA cellular network, and belongs the technical field of mobile communication. The method is realized by the steps that (1) thecellular network is colored in three colors, and the channel demand numbers of three colors of cells which are adjacent to one another and provided with the maximal sum of the channel demand numbers is obtained; (2) according the channel demand numbers of the three colors of cells, continuous OFDMA channels from the number 1 are generated; (2) first OFDMA channel allocation is carried out by taking the generated OFDMA channels as the cellular network; and (3) if the first OFDA channel allocation cannot satisfy the demand for the channel numbers of all cells, second OFDMA channel allocation iscarried out via a retarded noise chaotic neural network. Twice OFDMA channel allocation is sued to reduce the total required OFDMA channel number and the computing amount of dynamic channel allocation, and the instantaneity of radio mobile communication is ensured.

Description

technical field [0001] This patent designs a dynamic channel allocation method for OFDMA cellular networks, which belongs to the technical field of mobile communication. Background technique [0002] Orthogonal Frequency Division Multiple Access (OFDMA) technology can divide spectrum resources into several mutually orthogonal channels, which has the advantages of anti-multipath fading, anti-interference and high utilization of spectrum resources, and has been widely used in 4G cellular In the mobile communication of the network, it has also become a candidate air interface technology for the next generation of mobile communication. [0003] According to statistics, my country's current spectrum resource gap has reached 1553MHz. With the rapid growth of the number of mobile user terminals, the gap of spectrum resources will also become larger and larger. Therefore, maximizing the utilization of channel resources has always been a research hotspot in mobile communications. ...

AI Technical Summary

Problems solved by technology

[0006] First of all, in the case of relatively scarce channel resources, the existing dynamic channel allocation method does not improve the channel resource utilization rate of the OFDMA cellular network as much as possible, and the channel allocation scheme’s demand for the number of channels can easily exceed the channel specified by the system. The upper limit of the number leads to an increase in the blocking rate, which seriously affects the quality of service for users

[0007] Secondly, in order to improve the channel resource utilization of OFDMA cellular network, the existing dynamic channel allocation method often requires a large amount of calculation, resulting in a large calculation delay, which seriously affects the real-time performance of mobile communication.

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