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A multicast routing method for space dtn network

A network and space technology, applied in the field of satellite communications, can solve problems such as multicasting of DTN networks that do not involve space, and achieve the effects of improving network resource utilization, coping with long delays, and ensuring delivery rates.

Active Publication Date: 2020-02-14
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

But Sushant and Burleigh's research did not deal with the multicast problem of the space DTN network

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  • A multicast routing method for space dtn network

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0029]Let the multicast source node in the space DTN network be s, the destination node set D={d i |i=1,2,..,m}, source node s to destination node d i The path of p(s,d i ), path p(s,d i ) The number of hops is hop(p(s,d i )). The main process steps of building a space DTN network multicast tree T(s, D) are as follows figure 1 shown, including the following steps:

[0030] (1) Initializat...

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Abstract

The invention discloses a multicast routing method of a space DTN network, which belongs to the technical field of satellite communication. The present invention utilizes the periodic and predictable characteristics of the space node movement trajectory in the space DTN network to obtain information such as the contact start and end time between nodes, and according to the unique storage-carry-forward mechanism of the space DTN network, proposes the minimum timing between nodes Path algorithm, and by continuously iterating the minimum timing path algorithm, and using the public nodes in the multicast path to build a multicast tree, the multicast routing constructed by the method of the present invention can well deal with the long time delay of space DTN network space networking , high bit error rate, intermittent connection and limited network resources, guarantee the delivery rate of the network and improve the utilization of network resources.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and more specifically relates to a multicast routing method of a space DTN network. Background technique [0002] With the development of aerospace technology, how to use spacecraft networking to acquire, process and distribute space information in a timely and accurate manner has become a key technology. The structural characteristics of the DTN (Delay Tolerant Networks, instant delay tolerant network) network are highly compatible with the characteristics of the space spacecraft network. It is suitable for space spacecraft networking and interconnection with various ground networks to form a space DTN network. The space DTN network has the characteristics of long delay, intermittent connection, and high bit error rate of the traditional DTN network. In addition, because the on-board equipment uses aerospace-grade chips, the storage resources of the nodes in the space DTN network...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/753H04L12/761H04L45/16
CPCH04L45/16H04L45/48
Inventor 江国星陈利
Owner HUAZHONG UNIV OF SCI & TECH
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