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A Routing Method Applicable to Wireless Networks Based on Contention Forwarding

A routing and purpose technology, which is applied in the field of opportunistic routing of wireless networks, can solve the problems of large proportion of control frames and large maintenance costs of network routing, and achieve the effect of enhanced stability and strong real-time performance

Inactive Publication Date: 2018-10-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the opportunistic routing algorithm, each node needs to master the topology information of the entire network, the maintenance cost of network routing is large, and the proportion of control frames is large

Method used

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  • A Routing Method Applicable to Wireless Networks Based on Contention Forwarding
  • A Routing Method Applicable to Wireless Networks Based on Contention Forwarding
  • A Routing Method Applicable to Wireless Networks Based on Contention Forwarding

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Embodiment Construction

[0036] The routing method of the present invention is based on the fact that the root node and common nodes have a two-way path; when there is data to send, the entire network establishes and maintains the route from each node to the destination node; in the process of data sending, the next hop node is used to compete for data according to its own situation Forwarding right, the data forwarding method confirmed by the previous hop node.

[0037] An embodiment of the routing method of the wireless network is given below:

[0038] 1) Set a fixed root node for the whole network;

[0039] 2) The root node periodically broadcasts PP (ProactivePath) notification frames to the entire network, and each node in the entire network establishes a one-way route to the root node; the specific process of the root node broadcast is as follows: figure 1 Shown:

[0040]The root node broadcasts PP, which includes fields such as the root node address, the current sending node address, the numb...

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Abstract

The invention provides a method for selecting the next hop intermediate node based on competition forwarding, and a routing method suitable for wireless networks based on the node selection method. In the present invention, after the neighbors receive the data, the neighbors themselves compete for the forwarding right. By setting the backoff time and the extension rules of the backoff time, the backoff time of the node with a large number of hops to the root node will become longer when competing to forward the data. Let better nodes have higher priority. The routing method of the present invention only maintains the two-way routing between the root node and common nodes, and since a competition forwarding mechanism is adopted, there are multiple links between the root node and common nodes, and the stability is enhanced. When the data flow is generated, the destination node's one-way broadcast method in the data sending mechanism is used to make the whole network understand the routing information of the destination node. The invention can select the next hop node more optimally, has better transmission performance and lower routing overhead.

Description

technical field [0001] The present invention relates to the field of wireless network technology, in particular to a wireless network opportunistic routing technology. Background technique [0002] Wireless mobile ad hoc network is a multi-hop wireless network temporarily and dynamically formed by a collection of mobile nodes. It does not need to use any existing network infrastructure or centralized management. It is widely used in disaster relief, distributed collaborative computing and battlefield automation. and other occasions. The characteristics of self-organization, rapid deployment and no need for any fixed infrastructure make ad hoc networks as an important and promising research field attract great attention. However, due to factors such as node movement, signal interference, and power loss, it is inherently difficult to obtain accurate link state information and network topology information in an ad hoc network. On the other hand, heavy business traffic, freque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/02H04W40/22
CPCH04W40/02H04W40/22
Inventor 林水生刘悦阎波张颉
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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