Transmission agreement special for TP-S satellite channel

A satellite channel and transmission protocol technology, applied in transmission systems, radio relay systems, active electrical relay systems, etc., can solve the problem of high burst error rate, high burst error rate, and insufficient channel capacity of satellite channels. use, etc.
CN1405994AInactive Publication Date: 2003-03-26TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2003-03-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The character of the invention are as follows. The response mechanism of the TCP protocol is changed to the choice passive response. The sending ned only retransmits the data frames that the receiving end requests for re-transmitting definitely. The following measures change the conservative congestion control mechanism of TCP protocol to the active congestion control mechanism. The size of the slide window is set up as 32bit. When the congestion being detected, the decrement of the congestion window is 2 / 3 in TCP. In the congestion elusion stage, the congestion window takes on the non-linear growth. The rearward facing explicit congestion indicator is adopted so that the router informs the data-sending end directly that the network is about to be congested.
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Description

Technical field:

[0001] The TP-S satellite channel dedicated transmission protocol and transmission method belong to the satellite channel transmission protocol and technical field. Background technique:

[0002] Because the satellite channel has some characteristics different from the terrestrial channel, and the TCP / IP protocol was originally designed for the terrestrial network, the transmission performance of the TCP / IP protocol on the satellite channel is relatively poor. Several factors that have a greater impact on TCP are:

[0003] 1) Long delay: The delay of the satellite channel is very long. In the GEO system, the transmission round-trip time (the time required for the sender to send data to receive the response) is 540 milliseconds, while the transmission round-trip time of the general ground network is several to tens of milliseconds. Such a large delay makes TCP's slow start take a long time. Mechanisms such as congestion control also take several round trip...

Claims

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