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Reliable transmission acceleration method facing networks with high error rate and long delay characteristics

A technology of bit error rate and transmission rate, applied in the field of Internet end-to-end reliable transmission, can solve problems such as low performance, weak interoperability, and network bandwidth occupation

Active Publication Date: 2010-02-10
SICHUAN UNIV
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Problems solved by technology

Among them, the ECN method needs the special support of the intermediate router, and the interoperability with the current network structure is not strong; the TCP-Peach method is to judge the packet loss of the link by sending the detection message, which requires the intermediate router to support the priority policy, and detects the packet loss at the same time. Packets also occupy the network bandwidth and increase the bu

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  • Reliable transmission acceleration method facing networks with high error rate and long delay characteristics
  • Reliable transmission acceleration method facing networks with high error rate and long delay characteristics
  • Reliable transmission acceleration method facing networks with high error rate and long delay characteristics

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Embodiment Construction

[0052] The invention can be applied to the network with high bit error rate and long time delay. Implementation of the present invention will be further described below in conjunction with accompanying drawing:

[0053] refer to figure 1 As shown, it is the topological structure diagram of the experiment done by us to verify the present invention. The simulation test has simulated 10 pairs of business to carry out FTP file transmission. Every pair of business is that the client downloads 60M files from the FTP server, and they share the same bandwidth of 3Mbps bottleneck link. The figure also marks the bandwidth and propagation delay of some links. according to figure 1 With the topology shown, we verified the transmission performance of each protocol under different link bit error rates and different link propagation delays.

[0054] refer to figure 2 As shown, the bit error rate of the bottleneck link is 5×10 -6 , when the propagation delay is 50ms, the throughput com...

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Abstract

The invention relates to a reliable transmission acceleration method facing networks with high error rate and long delay characteristics, belonging to a reliable end-to-end transmission method of internet. In the invention, reasons that the network loses packages are distinguished according to the following method on the basis of a FAST TCP protocol: when a sending end receives 3 repeated ACK packages, the difference value of the transmission speed of a previous RTT and the transmission speed of a present RTT can be determined, when the transmission speed of the present RTT is larger than thetransmission speed of the previous RTT, the network does not have congestion, and the reason for losing package is link error; and when the transmission speed of the present RTT is greatly smaller than the transmission speed of the previous RTT, then the network can have congestion, and the package loss can be determined to be caused by network congestion. Calculated RTT can accurately and timelyreflect the current network status through the invention, thereby the reflection sensitivity of a congestion window of the sending end to the network status can be enhanced.

Description

technical field [0001] The invention relates to an end-to-end reliable transmission method on the Internet, in particular to a unilateral reliable transmission acceleration method for networks with high bit error rate and long delay. Background technique [0002] With the development and application of wireless network technology, the integration trend of various types of wireless networks (such as satellite networks, aviation communication networks, wireless mobile networks, etc.) and traditional ground fixed wired networks is becoming more and more obvious. The evolution of the network makes the structure of the network more complex, and the heterogeneity of the network is strengthened. From an application point of view, this type of network has characteristics such as high bit error rate (Bit Error Rate, BER), long delay, etc., and the bandwidth delay product (Bandwidth Delay Product, BDP) of the network is relatively large. When a traditional reliable transmission proto...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L12/56H04L47/32
Inventor 秦志红王俊峰张娟夏正洪
Owner SICHUAN UNIV
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