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Method for assigning integrated routing and channels of cognitive wireless mesh networks

A grid network and channel allocation technology, applied in wireless communication, electrical components, etc., can solve problems such as unfavorable network transmission performance, equalization of the number of channels that do not involve adjacent channel interference, improve network transmission performance, and avoid channel overloading. The effect of heavy and balanced channel load

Inactive Publication Date: 2010-05-26
NANTONG UNIVERSITY +1
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Problems solved by technology

The proposed cognitive wireless mesh network routing technology takes this feature into consideration, but it does not involve the equalization of interference between adjacent channels and the number of channels, which is not conducive to the improvement of network transmission performance

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  • Method for assigning integrated routing and channels of cognitive wireless mesh networks
  • Method for assigning integrated routing and channels of cognitive wireless mesh networks
  • Method for assigning integrated routing and channels of cognitive wireless mesh networks

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Embodiment Construction

[0024] The present invention adopts a combined routing and channel allocation method when routing is established between access nodes and terminal nodes in the cognitive wireless grid network. The access node of the network sends a synchronization frame signal to synchronize the clock of the receiving node. Each node in the network tries to discover neighboring nodes after the sensing period, broadcasts sensing information to neighboring nodes, and obtains a list of neighboring nodes at the same time. For the neighbor discovery process, please refer to figure 1 ,Specific steps are as follows:

[0025] S1-1 Each node obtains its own available channel list after passing the sensing cycle, the access node sends a synchronization frame, and the receiving node obtains the synchronization frame for clock synchronization.

[0026] S1-2 randomly selects the broadcast period window PW during the time slot corresponding to the available channel, and broadcasts its own available channe...

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Abstract

The invention relates to a method for assigning integrated routing and channels of cognitive wireless mesh networks. The method comprises the following steps that: a, a node senses external environment, broadcasts sense information to neighboring nodes, and acquires a list of the neighboring nodes; b, the node attempts to pass a topological form of a routing tree and chooses assignment channels according to metric values of channel statistics; c, the nodes are connected to a network, and by sorting hop counts and the metric values of channel statistics, the node with few hop counts or a small metric value of channel statistics is chosen as a father node; and d, the nodes exit from the network, and an exiting mode is chosen on the basis whether the node is the father node or a child node, and the information of the routing tree is updated. The method has the advantages of considering the characteristics of the dynamic change of the number of spectrum holes in cognitive environment, reasonably and effectively assigning channels and selected routing, balancing channel load, reducing interference between adjacent channels, avoiding too heavy load of individual channels and increase in time delay, giving full play to the advantages of multi-channel parallel transmission and improving network transmission performance.

Description

technical field [0001] The invention relates to a Cognitive Wireless Mesh Network (CogWMN), in particular to a joint routing and channel allocation method for a Cognitive Wireless Mesh Network. Background technique [0002] Cognitive wireless mesh network, as an intelligent wireless network, can sense the external environment and make intelligent decisions to adapt transmission parameters according to the current environment state. Such as coordinating information through the local environment, determining routing and channel allocation. Cognitive wireless mesh network belongs to Spectrum Sensing Access (DSA) network, and most DSA systems use global common channel to coordinate channel allocation. However, the terminal nodes in the network will not stay on the global public channel forever, nor will they always stay on a fixed authorized channel (Primary channel). In the process of routing establishment, the network needs to consider the allocation of the number of channel...

Claims

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Application Information

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IPC IPC(8): H04W40/02H04W72/12
Inventor 章国安丁晨莉徐晨包志华张源顾金媛
Owner NANTONG UNIVERSITY
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