Routing method, device and system for delay tolerant network

A delay-tolerant network and network technology, applied in the field of mobile networks, can solve problems such as network congestion, unsuitable resource limited scenarios, large network overhead, etc., and achieve the effects of improving routing efficiency, reducing transmission delay, and avoiding network congestion

Active Publication Date: 2015-07-22
CHINA UNITED NETWORK COMM GRP CO LTD
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Problems solved by technology

This flood forwarding method makes each node copy the message to the maximum extent before the message is delivered to the destination node, so for the mobile node with limited cache and energy, the resource will be exhausted quickly and exit the network, and many nodes simultaneously Participating in forwarding messages, the network overhead is too large, which can easily lead to network congestion, so this routing method is not suitable for scenarios with limited resources in the actual environment

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  • Routing method, device and system for delay tolerant network
  • Routing method, device and system for delay tolerant network
  • Routing method, device and system for delay tolerant network

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Embodiment Construction

[0020] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] figure 1 It is a flowchart of an embodiment of the delay-tolerant network routing method of the present invention, such as figure 1 As shown, the method of the present embodiment includes:

[0022] Step 101, the node carrying the message or message copy determines whether the node itself is an active node according to the current node activity of the node itself and the preset node classification threshold, if so, execute step 102, otherwise execute step 103;

[0023] Step 102, copying and forwarding the message or a copy of the message to other active nodes encountered;

[0024] Step 103: Forward the message or the copy of the message to other nodes encountered that are more active than the node itself, and delete the message or the copy of the message carried by the node itself.

[0025] In this embodiment, first define the node ac...

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Abstract

The invention discloses a routing method, device and system for a delay tolerant network. The method for the delay tolerant network comprises the following steps of determining either the node type of a node is an active node or a silent node according to the current node activeness and preset node classification threshold by a node which carries message or message copy, if the node type is an active node, copying and transferring the message or the message copy to encountered other active nodes; if the node type is a silent node, transferring the message or message copy to the encountered other nodes which are higher in node activeness than the node, and canceling the message or the message copy carried by the node. According to the routing method, the device and the system provided by the invention, the number of message copies in the network can be reduced; the network expense can be reduced; the message can be transferred to a destination node reliably as soon as possible; and meanwhile, the routing efficiency is improved.

Description

technical field [0001] The invention relates to mobile network technology, in particular to a delay-tolerant network routing method, device and system. Background technique [0002] Delay Tolerant Network (hereinafter referred to as: DTN) is an intermittently connected network composed of mobile nodes with intermittent network connections. How to transmit messages when the network topology changes dynamically over time? Getting to the destination node is the key problem to be solved. [0003] In order to transmit the message to the destination node as much as possible, the Epidemic Routing method in the prior art adopts a flooding forwarding mechanism, that is, each node carrying a message can forward the message to other nodes it encounters, while Other nodes also forward the message to other nodes they have encountered, so as to realize the transmission of the message to the destination node. This flood forwarding method makes each node copy the message to the maximum ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/08H04W40/04
Inventor 房秉毅张云勇徐雷
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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