A dynamic channel allocation method for ofdma cellular networks

Abstract

This patent proposes a channel allocation method for OFDMA cellular networks, which belongs to the technical field of mobile communication. The implementation steps are: (1) Color the cellular network with 3 colors, and find the channel demand numbers of the three-color cells adjacent to each other and the sum of the channel demand numbers is the largest; (2) According to the found 3-color cell The number of channels required by the cell, generate continuous OFDMA channels numbered from 1; (2) Use the generated OFDMA channel to allocate the first OFDMA channel for the cellular network; (3) If the first OFDMA channel allocation cannot satisfy all cells For the requirement of the number of channels, the hysteresis noise chaotic neural network is used for the second OFDMA channel allocation. This patent can effectively reduce the total number of required OFDMA channels and the calculation amount of dynamic channel allocation through two OFDMA channel allocations, thereby improving the utilization rate of OFDMA channel resources and ensuring the real-time performance of wireless mobile communications.

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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