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File transferring method with self-adaptive control of transmission speed and system thereof

A technology of adaptive control and sending rate, applied in the field of file transfer, which can solve problems such as increasing network overhead

Active Publication Date: 2010-02-24
INST OF ACOUSTICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can adjust the sending rate under a time-varying network, but the client must return a confirmation to the server every time it receives a "content packet with a logo", which also increases some network overhead; and the returned confirmation packet is sent to the server through the UDP protocol. Sent by the server, in the case of severe network packet loss, a "identified content packet" will be resent multiple times

Method used

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  • File transferring method with self-adaptive control of transmission speed and system thereof
  • File transferring method with self-adaptive control of transmission speed and system thereof
  • File transferring method with self-adaptive control of transmission speed and system thereof

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Embodiment Construction

[0061] In the following, the file transfer method and system for adaptive traffic control of the present invention will be described in detail with reference to the accompanying drawings.

[0062] figure 1 It is a composition diagram of the file transmission system for flow adaptive control of the present invention, and the system includes a server end and a client end.

[0063] The server includes: 101) TCP sending and receiving thread, 102) central scheduling module, 103) file fragmentation module, 104) retransmission management module, 105) sending thread management module, 106) UDP sending thread, 107) block adjustment module, wherein,

[0064] 101) TCP sending and receiving thread completion: transmission of block information synchronization, file download request, resend request, UDP thread number adjustment request and other instructions, one TCP sending and receiving thread can improve services for multiple clients, and one server allows multiple TCP send and receive ...

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Abstract

The invention discloses a file transferring method with self-adaptive control of transmission speed and a system thereof; UDP protocol is adopted to transfer file data, other commands are carried outby TCP protocol; the file data takes 'block' as a basic unit for each transferring and verifying the completeness, and transmission speed is adjusted by adopting a way of dynamically adjusting the size fine grit of a transmission 'block'; the file is divided into 1-N file fragments by a server, and each file fragment is transmitted by a UDP send data; the server transmits according to the size ofthe presetting block, a client side verifies the result weather to be retransmitted by requesting the server according to the completeness of the received block, if the sever receives the retransmitting request from the client side, the size of the block can be dynamically adjusted. In addition, the transmission speed is adjusted by dynamically adjusting the number of transmission threads. In theinvention, less network expense is increased, and network resource accessed by the client side can be effectively utilized, and the transferring time of the whole file is reduced.

Description

technical field [0001] The invention relates to the technical field of file transmission in a network environment, in particular to a file transmission method and system for adaptive control of sending rate. Background technique [0002] In the network environment, point-to-point file transfer usually uses protocols such as File Transfer Protocol (FTP, File Transfer Protocol), Hypertext Transfer Protocol (HTTP, Hyper Text Transfer Protocol), and its basic method is to use Transmission Control Protocol (TCP, Transmission Control Protocol) to Ensure transmission reliability. However, this guarantee of reliability sacrifices transmission efficiency, increases transmission time, and affects terminal (user) experience. US Patent No. 6,085,251 discloses a method for improving file transfer efficiency by transferring files in parallel. In this method, a server divides a single file into multiple data packets, sends these data packets to a client in parallel, and finally the clien...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L29/06H04L1/00
Inventor 王劲林齐向东刘学李良斌尤佳莉
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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