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Routing method adapting to make-and-break connection data transmission of spatial network link

A technology of data transmission and space network, applied in the direction of digital transmission system, transmission system, data exchange network, etc., can solve the method and duration of intermittent connection of space network link that is too expensive and cannot adapt to the intermittent connection of the link Short and other problems, to achieve the effect of facilitating the intermittent connection of the space to the network data transmission

Active Publication Date: 2016-10-26
10TH RES INST OF CETC
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Problems solved by technology

[0024] The purpose of the present invention is to provide a convergent solution for the shortcomings of the prior art, such as frequent on-off changes of space network links and short duration, and direct use of the Open Shortest Path Spanning Tree Protocol (OSPF) protocol, which will cause too slow convergence speed and excessive overhead. The speed is fast, the overhead of the routing protocol is small, and it can adapt to the intermittent connectivity of the space network. The OSPF routing calculation method is improved to improve the method of adapting to the intermittent connectivity of the space network link that the existing routing calculation method cannot adapt to the link intermittent connectivity problem.

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  • Routing method adapting to make-and-break connection data transmission of spatial network link

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[0033] The following will be combined with figure 1 The present invention is further described.

[0034] The main improvement idea of ​​the improved OSPF protocol is that when the position of the spacecraft is predictable, all states of each link during the operation of the entire space network system, including on-off changes and change times, can be determined through calculation in advance. It can be seen that during the entire system running time, the network topology can be represented by a series of time graphs. At any time point t, each edge in the topology graph has a cost, and the result can be calculated from the position information according to the signal attenuation formula. Therefore, the topology state matrix at any time can be established, and then the routing table can be calculated by using the shortest path algorithm. When the improved OSPF protocol is running, if any link on the path changes, from off to on, or from on to off, the routing table will be upd...

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Abstract

The invention discloses a routing method adapting to make-and-break connection data transmission of a spatial network link. By using the routing method disclosed by the invention, the convergence rate can be significantly improved, and the overhead of a routing protocol can be significantly reduced. The routing method is implemented through the following technical scheme: each routing node receives routing node three-dimensional location information through a measurement and control link, a predicted link state matrix is acquired, link state information and a predicted routing table of the routing node at each link variation moment are calculated, and the calculated link state information is stored into a link state information database; a sub-group to be sent acquires a link variation moment and a break-make condition through the predicted routing table, a routing node to-be-sent sub-group stores the link state information into a link state information database through switching each routing node variation and variation moment, and the link state information is written into a predicted route calculation matrix; when an OSPF (Open Shortest Path First) reaches a full state, each routing node calculates an actual routing table again according to the updated link state information database so as to replace the predicted routing table.

Description

technical field [0001] The invention relates to the technical field of satellite measurement and control network communication protocols, in particular to a method for calculating routes in a network layer protocol, which can be used in the calculation method for routes in measurement and control networks. Background technique [0002] The satellite measurement and control network is a system for tracking, measuring and controlling spacecraft. It is composed of aerospace control center, aerospace measurement and control station, land activity measurement and control station, survey ship and the measurement and control communication network connecting them. The main task of the satellite measurement and control network is to use the measurement and control network to conduct timely and accurate real-time tracking, measurement and control of spacecraft operating in space, to grasp the operating status of the spacecraft and issue instructions to control its work. The main meas...

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Application Information

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IPC IPC(8): H04L12/721H04L12/751H04L12/753H04L45/02
CPCH04L45/02H04L45/12H04L45/123H04L45/48
Inventor 李望胡建平李婷
Owner 10TH RES INST OF CETC
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