Distributed topology control method for cognitive Ad Hoc network

A technology of distributed topology and control method, which is applied in the field of cognitive Ad Hoc network and construction of network topology structure, which can solve the problems of high algorithm complexity, inability to eliminate secondary user interference, and inability to distribute execution, etc., to achieve a small number of channels , reduce the overall complexity, and eliminate the effect of interference

Active Publication Date: 2015-04-08
XIDIAN UNIV +1
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AI Technical Summary

Problems solved by technology

The algorithm of Jing Zhao et al. can ensure the connectivity of the secondary user network, but cannot eliminate the interference between secondary users
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  • Distributed topology control method for cognitive Ad Hoc network
  • Distributed topology control method for cognitive Ad Hoc network
  • Distributed topology control method for cognitive Ad Hoc network

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Embodiment Construction

[0037] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] refer to figure 1 , the cognitive Ad Hoc network used in the present invention is composed of n nodes distributed in a two-dimensional plane area. Each node represents a secondary user and has a unique ID serial number, and can obtain its own location information through GPS or other positioning technologies. All nodes are affected by the same primary user, and the primary user can use any one of the C channels. Each node can send data in any one of the C channels, and listen to data on all other channels at the same time. In addition, each node has no physical structure, initial settings, functional characteristics, parameter indicators, etc. difference. In the network, the wireless channel between any nodes is an additive Gaussian white noise channel. Nodes communicate with surrounding nodes through omnidirectional antennas, an...

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Abstract

The invention discloses a distributed topology control method for a cognitive Ad Hoc network, and mainly solves the problems of mutual interference of secondary users and failure in guarantee of connectivity of networks of the secondary users in the prior art. An implementation process of the distributed topology control method for the cognitive Ad Hoc network includes: enabling each node in the network to sequentially broadcast a HELLO packet twice, and receiving the HELLO packet of initial neighbor nodes to set up a local two-hop topology subgraph; constructing a shortest path tree according to energy consumption link cost weight on the basis of the local two-hop topology subgraph, and on the basis of the shortest path tree, constructing a local generation subgraph capable of guaranteeing user communication; adjusting transmission power according to one-hop neighbor nodes in the local generation subgraph; enabling all nodes in the network and links between the nodes and the logical neighbor nodes thereof to form a whole network topology; after topology construction is finished, performing independent channel selection for the nodes in the network. The distributed topology control method for the cognitive Ad Hoc network has the advantages of low complexity and realization of guaranteeing communication of user networks and eliminating user interference, and is applicable to the cognitive Ad Hoc network.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a method for constructing a network topology, which can be used to recognize Ad Hoc networks. Background technique [0002] Cognitive Ad Hoc network is the combination of cognitive network and traditional Ad Hoc network. It also has the ability to perceive, opportunistically access, and dynamically allocate spectrum resources, and can be flexibly used in various environments without fixed communication infrastructure support to improve the utilization of existing frequency band resources. [0003] Among the many factors that affect the performance of cognitive Ad Hoc networks, the topology of the network is an important aspect that cannot be ignored. Therefore, how to optimize the topology of cognitive Ad Hoc networks, enhance the fault tolerance of the network topology, and provide Good underlying topology support is the focus of topology control technology research. In t...

Claims

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Application Information

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IPC IPC(8): H04W72/08H04W84/18
CPCH04W40/246H04W84/18H04W72/541Y02D30/70
Inventor 王玺钧盛敏翟道森张琰李建东郭彦涛
Owner XIDIAN UNIV
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