Routing method for data transmission in space delay/disruption tolerant network

A delay-tolerant and break-tolerant network and data transmission technology, applied in the routing field of data transmission, can solve problems such as insufficient use of prior knowledge information, data transmission failure, etc.

Active Publication Date: 2012-11-14
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0013] However, neither the flooding routing strategy for the terrestrial DTN network nor the contact graph routing protocol for the interplanetary network has made full use of the

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  • Routing method for data transmission in space delay/disruption tolerant network
  • Routing method for data transmission in space delay/disruption tolerant network
  • Routing method for data transmission in space delay/disruption tolerant network

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] When a node in the network wants to transmit data, the routing method of the present invention can be applied. Such as figure 1 As shown, the present invention is as follows: the above-mentioned nodes first need to query static routes, if there is a static route, the data will be directly queued to the corresponding exit queue of the node, and the route will be terminated at the same time; if there is no static route, the dynamic routing method will be executed.

[0041] That is, the concrete steps of the present invention are (see figure 2 ):

[0042] (1) Static route search: When a node needs to transmit data, search whether there is a static route from the node to the destination node; if a static route is found, insert the data into the corresponding export transmission queue of the node to complete the data route; If d...

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Abstract

The invention discloses a routing method for data transmission in a space delay/disruption tolerant network. The routing method comprises the following steps: (1) searching for a static route: if no static route exists, executing dynamic route calculation; and (2) calculating a dynamic route: calculating the dynamic route according to a source node for transmitting data and a destination node by the following substeps: (2.1) calculating the minimum delay route; (2.2) testing the capacity of the route; and (2.3) selecting a next-hop node: comparing delays of all the selected routes, and selecting the minimum delay route. According to the invention, the routing method is based on space delay/disruption tolerant network capacity constraints of a node contact relational graph in the network, and the minimum delay route from the source node to the destination node can be calculated by precognizing a contact relation graph among nodes in the running process of the whole network and data streams among node pairs, so that the throughput of the whole network can be increased, the space node resources can be saved, and higher network performance can be obtained.

Description

technical field [0001] The invention mainly relates to the field of network communication, in particular to a routing method for data transmission in a space delay-tolerant and break-tolerant network. Background technique [0002] The Internet has achieved great success in interconnecting communication devices around the world. It uses the TCP / IP protocol cluster as a homogeneous communication protocol set, which can shield network heterogeneity. However, in TCP / IP, there are also many assumptions about the underlying transport protocol; for example: there must be a continuous end-to-end path between the sending and receiving nodes, the RTT between any sending and receiving nodes is small and relatively consistent, and the communication link error Rate and packet loss rate are low, etc. However, in recent years, many emerging networks have emerged, and these networks have very distinctive characteristics: high latency, low data rate in path and link characteristics, and sta...

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Application Information

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IPC IPC(8): H04L12/56
Inventor 虞万荣肖力滔肖云陈煜琪王世寅
Owner NAT UNIV OF DEFENSE TECH
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