Method of setting round trip time (RTT) parameter in disruption tolerant network

A technology that is tolerant of network and network equipment, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve problems such as inability to adapt to link intermittent connectivity, timeout, etc., to reduce the number of retransmitted packets and improve throughput volume effect

Active Publication Date: 2015-12-02
10TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] In view of the deficiencies in the prior art, the present invention aims to provide a method that can effectively reduce the number of retransmission packets at the sending end, improve the throughput of the sending end, and avoid the phenomenon that the retransmission timer at the sending end expires when the path is disconnected. RTT setting method to improve the problem that the existing RTT setting method cannot adapt to the link intermittent connection

Method used

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  • Method of setting round trip time (RTT) parameter in disruption tolerant network
  • Method of setting round trip time (RTT) parameter in disruption tolerant network
  • Method of setting round trip time (RTT) parameter in disruption tolerant network

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Embodiment

[0049] During the operation of the network, the sender sets the RTT for the packets to be sent. It should be noted that in this embodiment, the sender A will send packets to the receiver B of the network device to receive the service, and the connection sequence of the AB path is known. Figure such as figure 2 As shown, the connection timing of the AB path is t1=10, t2=20, t3=30, there are packets to be sent at these two moments, and it is assumed that the measured RTTmea=500ms and t3=30 at t1=10 The measured RTTmea=300ms.

[0050] For the packet of t1=10, there is no packet sent at the last connection time, so RTTold=0. Therefore RTTnow = RTTnow = 500ms.

[0051] for t 2 =20 grouping, the grouping sent at the last connection time, that is, t 1 RTTnow = 500ms for a packet of = 10. From the sequence diagram of path connectivity, we can know that t p (t 2 ) = 420s. Therefore RTT now =RTT old +t p (t 2 ) = 420.5s.

[0052] for t 3 =30 grouping, the grouping sent at t...

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Abstract

The present invention provides a method of setting an RTT parameter in a disruption tolerant network, and aims to provide an RTT setting method based on the disruption tolerant network which enables the number of sending end retransmission groupings to be reduced effectively and the sending end throughput to be improved, and can avoid the overtime phenomenon of a path disconnection sending end retransmission timer. The method of setting the RTT parameter in the disruption tolerant network of the present invention is realized by the following technical scheme that: in a transmission layer protocol,firstly a network end-to-end path communication time quantum is set as an end-to-end communication timing sequence from a sending end to the whole network all other nodes; setting the RTT in the transmission layer protocol for the to-be-sent data groupings at the sending end; in the end-to-end path communication time quantum of a known network, setting the time t of the RTT, defining the RTTold as the RTT value of a last communication time quantum sending grouping, defining RTTmea as the RTT value of the current measurement, defining RTTnow as the current usage RTT value, and defining the time tp(t) from the moment t to the next path communication; using the sending end to determine a moment t end-to-end communication path, finally setting the RTT according to the tp (t) value, and ending.

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 setting the round trip time RTT in the transport layer protocol, which can be used for setting the round trip time RTT parameter in the measurement and control network. Background technique [0002] The tracking measurement and control spacecraft system composed of space control center, aerospace measurement and control station, land activity measurement and control station, measurement ship and the measurement and control communication network connecting them is the main measurement and control equipment of the satellite measurement and control network. The measurement and control equipment mainly includes microwave radar, ultrashort-wave Doppler velocimeter and optical equipment, as well as dual-frequency Doppler velocimeter, UHF command remote control system and microwave unified system, etc. The main task ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/841H04L12/24
Inventor 徐会忠周文炯李望
Owner 10TH RES INST OF CETC
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