Cognitive radio mesh network resource distribution and routing method

A technology of network resource allocation and cognitive radio, applied in the field of cognitive radio network

Inactive Publication Date: 2015-10-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004]Different from traditional networks, the spectrum of a cognitive wireless mesh network changes dynamically. The available channels, available wireless interfaces, transmit power and The routing path also changes with time, so the method of only constructing a conflict graph for channels in traditional mesh networks is not suitable for cognitive wireless mesh networks, and the existing solutions are tree-shaped routing methods, that is, from source nodes to The destination node has only fixed one or two (another backup path) paths

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  • Cognitive radio mesh network resource distribution and routing method
  • Cognitive radio mesh network resource distribution and routing method
  • Cognitive radio mesh network resource distribution and routing method

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[0057] The present invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0058] After the network is established, the four-dimensional conflict graph building block in the controller starts to work, such as image 3 As shown, there are three nodes in the network, node A has an available channel c 1 , the adjustable power is L 1 , L 2 Two levels, the wireless interface has only one h 1 ;Node B has two available channels c 1 、c 2 , the adjustable power is L 1 , there are two wireless interfaces h 1 、h 2 ;Node C has two available channels c 1 、c 2 , the adjustable power is L 1 , there is only one wireless interface h 1 . There are three links (A, C), (B, A), (B, C) in the figure, and the dotted line of (A, C) indicates that only the transmission power of node A is a large value L 2 Only then can it communicate with node C. Based on this information, a four-dimensional topology map is constructed in the con...

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Abstract

The invention discloses a cognitive radio mesh network resource distribution and routing method, comprising: introducing a buffer memory mechanism into a cognitive radio mesh network to generate two special network structures, i.e. a multi-source single-purpose network and a single-source multi-purpose network; in order to solve the problem of dynamic routing and resource distribution of the two structures, constructing a four-dimensional conflict graph of channels, radio interfaces, power and link resources in a controller; finding partial maximal independent sets covering all elements from the conflict graph; and employing an optimization method to solve a regulation scheme best meeting user requirements.

Description

technical field [0001] The invention belongs to the field of cognitive radio networks, and in particular relates to a method for dynamically allocating and routing four resources of a channel, a wireless interface, a transmission power and a link in a cognitive wireless mesh network. Background technique [0002] With the development of wireless communication technology, wireless communication devices such as smartphones, tablet computers, and smart homes have proliferated, and people's requirements for data transmission rates have continued to increase. Unable to meet people's increasing bandwidth demand. At the same time, new wireless communication services continue to emerge, such as wireless local area networks, vehicle networks, etc., and the available spectrum is almost exhausted. Therefore, cognitive radio technology has become a key technology for the evolution of wireless networks. [0003] In addition, multimedia content accounts for an increasing proportion of In...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10
CPCH04W16/10
Inventor 陈兵沈宏钱红燕
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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