Routing method for distributed cognition radio network based on layer-striding design

A cognitive radio, cross-layer design technology, applied in wireless communication, electrical components, transmission monitoring and other directions, can solve problems such as being unsuitable for practical applications and high time complexity, and achieve the effect of simple establishment and low time complexity

Inactive Publication Date: 2010-10-27
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

The literature only studies the conflict avoidance problem theoretically, but its high time complexity is not suitable for practical applications

Method used

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  • Routing method for distributed cognition radio network based on layer-striding design
  • Routing method for distributed cognition radio network based on layer-striding design
  • Routing method for distributed cognition radio network based on layer-striding design

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Embodiment Construction

[0044] The specific implementation is as follows:

[0045] (a) Establishment of the coloring multi-graph model: each channel is given a unique color identification, if two nodes are within the transmission range of each other, and there are common available channels, they are potential neighbor nodes of each other. Constructing a colored multigraph is to connect an edge between each pair of potential neighbor nodes and color the edge with the color corresponding to their common channel. In this way, a colored multigraph G=(V, E) reflecting the network topology and currently available channels is obtained, where V represents the set of vertices, corresponding to the set of nodes in the network, and E represents the set of edges, corresponding to the set of links in the network . Define the weight function w: E(G)→R + And the color labeling function k: E(G)→{Ch1, Ch2, . . . , ChN}. The weight function is a function defined on the edge set of the graph G, and the value range i...

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Abstract

The invention discloses a method for distributed type cognitive radio network routing based on cross-layer design, which belongs to the technical field of cognitive radio network. The method comprises the following steps: establishing a coloring multi-graph model according to useable frequency spectrum information acquired by node perception; transferring a cross-layer design routing algorithm tosearch the routing between a source node and a target node, and simultaneously selecting communication signal channels between adjacent nodes; and updating the topology of coloring multi-graph and interface number of the nodes. The routing method adopts the cross-layer design on the routing selection of a network layer and an MAC layer, and concretely optimizes routing hop number and adjacent hopinterfere under the condition of lower time complexity. The method is applicable to radio network, next generation heterogeneous network and so on.

Description

technical field [0001] The invention relates to a routing selection between nodes in a distributed cognitive radio network, and in particular provides a routing method for a cognitive radio network based on cross-layer design. Background technique [0002] The distributed cognitive radio network is composed of peer-to-peer nodes with spectrum sensing function. Each node can perceive the idle spectrum, and make full use of the perceived idle spectrum for communication without interfering with authorized users, so as to improve spectrum utilization. The routing method is used to establish information transmission paths between nodes and select intermediate nodes that need to forward information. The spectrum dynamics of the cognitive radio network determines that its routing needs to be designed across layers. [0003] Due to the dynamic nature of spectrum available in cognitive radio networks, none of the existing wireless network routing protocols can be directly applied to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/02H04W40/16H04B17/00H04W24/02
Inventor 周贤伟王建萍刘涛林琳王超杨裕亮
Owner UNIV OF SCI & TECH BEIJING
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