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Vegas algorithm improvement-based satellite network congestion control method

A congestion control and satellite network technology, applied in the field of satellite network congestion control, can solve the problems of large communication distance changes and inaccurate estimation of network available bandwidth, and achieve the effects of improving fairness, improving unfairness, and accurate performance

Inactive Publication Date: 2011-06-01
DALIAN UNIV
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Problems solved by technology

[0012] Aiming at the problem that the communication distance varies greatly in the satellite network and the available bandwidth of the network cannot be accurately estimated, the invention proposes a congestion control method suitable for the satellite network

Method used

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  • Vegas algorithm improvement-based satellite network congestion control method
  • Vegas algorithm improvement-based satellite network congestion control method
  • Vegas algorithm improvement-based satellite network congestion control method

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Experimental program
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Embodiment Construction

[0058] Aiming at the influence of the change of the link length in the Vegas algorithm on the BaseRTT, the invention proposes a congestion control method suitable for satellite networks based on the improvement of the Vegas algorithm. In the actual implementation, this algorithm can be placed on the satellite nodes. In the process of data transmission, the nodes passed by the satellites can be obtained through routing and ephemeris information, and the above calculations can be performed to complete the flow control of the satellite network.

[0059] For example: assume that the node information setting in this satellite network congestion control method is as shown in Table 1:

[0060] Table 1 Node information table

[0061] node

[0062] There are two links in this topology structure, namely LEO1-GEO1-GEO2-Fac1 and LEO2-GEO1-GEO2-Fac2, where the link between GEO1 and GEO2 is the bottleneck link of the backbone network. The link bandwidth between low-orbit satellit...

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Abstract

The invention discloses a Vegas algorithm improvement-based satellite network congestion control method and is applicable to satellite network congestion control. Round trip time (RTT) fluctuation influence due to distance change is removed in the RTT, a BaseRTT calculation method in Vegas is improved, and the improved BaseRTT is called as BaseRTT-sat and can be changed with the distance change; therefore, the satellite network performance can be more accurately estimated, and a network congestion window can be accurately adjusted. Therefore, the congestion control influence of the communication distance change on the Vegas algorithm in the satellite network is removed, the performance of the Vegas algorithm in the satellite network is improved, bandwidth allocation fairness of the satellite network is improved, and the improved algorithm is more applicable to the satellite network.

Description

technical field [0001] The invention is a satellite network congestion control method based on the improvement of the Vegas algorithm, which is suitable for the satellite network congestion control. Background technique [0002] With the continuous development of satellite technology, satellite communication network occupies an increasingly important position in the field of communication. And the application of TCP protocol in satellite network is getting more and more attention. Compared with previous congestion control algorithms, the Vegas algorithm has the following advantages: [0003] 1. Adopt a new retransmission mechanism. TCPVegas uses a more accurate RTT estimate to determine whether retransmission is required. Vegas reads and records the system time when each packet is sent, when an ACK arrives, Vegas reads the system clock again and calculates the RTT with that time and the previously recorded time. Decide whether to resend in the following two cases: [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/02H04W84/06
Inventor 潘成胜魏德宾蔡睿妍宣景朋
Owner DALIAN UNIV
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