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Method and apparatus for calculating network minimum round-trip time PIAD

A technology of round-trip time and calculation method, applied in wireless network protocols, transmission systems, electrical components, etc., can solve the problems of inability to accurately obtain the minimum round-trip time and large errors of the minimum round-trip time.

Inactive Publication Date: 2009-05-20
SHENZHEN TINNO WIRELESS TECH
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Problems solved by technology

[0008] In order to overcome the problem that the existing calculation method calculates the minimum round-trip time in a heterogeneous wireless network, the error is too large, and the minimum round-trip time cannot be accurately obtained. The precise minimum round-trip time calculation method of the state—the minimum round-trip time negatively increases and actively reduces the PIAD algorithm ((Passive-Increase Aggressive-Decrease) calculation method and calculation device

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  • Method and apparatus for calculating network minimum round-trip time PIAD
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  • Method and apparatus for calculating network minimum round-trip time PIAD

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Embodiment Construction

[0016] The present invention proposes a PIAD calculation device for the minimum round-trip time of the network, including a sampling module, a comparison module, a judgment module, a control processing module, and the sampling module samples the round-trip time of the heterogeneous wireless network to obtain the current round-trip time sampling; the comparison module compares the current round-trip time The time sampling is compared with the minimum round-trip time of the system; the judging module judges the status of the next hop module according to the return value of the comparison module, the timer state and the sampling state of the round-trip time; the control processing module determines the method of executing the minimum round-trip time algorithm according to the judgment result of the judging module ; If the current round-trip time sampling is less than the minimum round-trip time of the system, execute the positively decrease AD algorithm; otherwise, execute the nega...

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Abstract

The invention applies for the protection of a PLAD method for computing network minimum round trip time and relates to TCP technology in the field of communication. Aiming at the problems of the method for computing minimum round trip time in the prior TCP protocol in heterogeneous wireless networks, the invention provides a passive-increased aggressive-decreased mechanism-based PLAD algorithm for the minimum round trip time. The method comprises: round trip time sampled during TCP communication is compared with current minimum round trip time; if the sampled round trip time is more than or equal to the current minimum round trip time, a passive-increased (PI) algorithm is used to compute new minimum round trip time; and if the sampled round trip time is less than the current minimum round trip time, an aggressive-decreased (AD) method is used to compute new minimum round trip time. The method realizes precision minimum round trip time computed in modified protocols of TCP relying on the minimum round trip time (such as TCP-Vegas, TCP-Westwood and TCP-Veno) and improves network utilization rate.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to the calculation problem of the minimum round-trip time in the TCP technology. Background technique [0002] The TCP protocol is the most widely used protocol in the Internet. It provides reliable end-to-end services, such as our commonly used WWW, TELNET, EMAIL, etc., all use TCP as the transport layer protocol. As early as 1997, the statistics of Bell Labs showed that the byte and message communication services undertaken by the TCP protocol accounted for 95% and 90% respectively, so the TCP protocol is very important to the quality of network communication. At present, the application of TCP protocol has moved from wired network to wireless network, and the problem of roaming between different wireless access technologies has brought the research of TCP protocol in heterogeneous wireless networks. [0003] Since V.Jacobson proposed the TCP congestion control alg...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W80/06H04L29/06
Inventor 陈前斌周敏唐伦董静
Owner SHENZHEN TINNO WIRELESS TECH