A Cross-Layer Congestion Control Method in Satellite Networks

A technology of congestion control and satellite network, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc. It can solve the problems of data packet loss, TCP cannot accurately predict congestion and judge network congestion and bit errors, etc., to improve throughput The effect of rate and bandwidth utilization

Inactive Publication Date: 2011-12-21
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006]Technical problem: the purpose of this invention is to provide a kind of congestion control method combined with cross-layer design in satellite network, to solve the problem that TCP canno...

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  • A Cross-Layer Congestion Control Method in Satellite Networks
  • A Cross-Layer Congestion Control Method in Satellite Networks
  • A Cross-Layer Congestion Control Method in Satellite Networks

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Embodiment Construction

[0024] Method flow:

[0025] 1. Cross-layer design of the link layer

[0026] The traditional queue management adopts the tail discarding algorithm, which is easy to cause problems such as global synchronization and easy buffer filling. The basic idea of ​​the RED congestion control mechanism is to detect congestion by monitoring the average length of the output port queue of the router. Once the congestion is found to be approaching, randomly select the connection to notify the congestion, so that they can reduce the congestion window before the queue overflows and cause packet loss. Send data speed, thereby relieving network congestion. RED is also relatively simple to implement because it is based on a FIFO queue scheduling strategy and only drops packets that are entering the router. The RED algorithm mainly includes two parts: calculating the average queue length and calculating the probability of discarding packets.

[0027] (1) Calculation of average queue length

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Abstract

The design method of cross-layer congestion control in satellite network is a solution to enhance TCP performance by using cross-layer design in satellite network. It is mainly used to solve the impact of the high bit error environment of satellite network on TCP, so that TCP can predict congestion in time and correctly judge the packet loss caused by network congestion and bit error, which belongs to the field of congestion control of satellite network. It should have the following features: the present invention enables the TCP layer and the link layer to realize cross-layer interaction, so that the queue state in the link layer can be passed to the TCP layer, so that the TCP layer can judge the congestion status of the link according to the state of the queue , so as to adopt corresponding strategies, and finally achieve the effect of improving TCP performance.

Description

technical field [0001] The invention is a performance solution for transport layer protocol in satellite network. The invention is mainly used to improve the performance of the TCP protocol in the satellite network, and belongs to the technical field of congestion control of the transmission layer of the satellite network. Background technique [0002] With the popularization of the Internet, the number of users and applications on the Internet is increasing rapidly. When the total demand of multiple users on the network is greater than the actual transmission capacity of the network, network congestion will inevitably occur. Although congestion stems from resource shortage, increasing resources cannot prevent congestion, and sometimes even aggravate congestion. For example, increasing the gateway cache can apparently prevent or alleviate the packet loss caused by congestion, but with the increase of the cache, the end-to-end delay will increase accordingly. Because the du...

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Application Information

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IPC IPC(8): H04L29/06H04L12/56H04L12/753
Inventor 叶晓国吕康蒙孙力娟肖甫王汝传邹志强刘林峰李鹏
Owner NANJING UNIV OF POSTS & TELECOMM
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