Multipoint file reliable transmission method based on group management

Abstract

The invention discloses a multipoint file reliable transmission method based on group management. When a file is transmitted, a client sends the file which needs to be transmitted to all server sideswhere the file needs to be updated, and simultaneously the client designates one or more of the server sides to carry out file confirmation; and after receiving the file, each server side carries outstorage on the file and views whether the client designates the server side to carry out file confirmation, and if yes, the server side checks whether the received file is correct and feeds back to the client. According to the invention, in the file multipoint sending process, all file receiving parties are guaranteed to receive the correct file, and reliability and correctness of the file transmission are ensured. According to the invention, equipment which needs to receive the file is divided into the same group logically, and when the file is sent for once, all the equipment which needs toreceive the file can receive the file, so that file transmission efficiency is improved. Meanwhile, the invention provides a flexible reliable file transmission scheme which not only can be applied toEthernet, but also can be applied to various bus technologies.

Description

technical field [0001] The present invention relates to the technical field of train network, more specifically, to a method for reliable transmission of multi-point files based on group management. Background technique [0002] With the development of train network technology, it is often necessary to transfer the same file to multiple devices on the train. In this scenario, the current solution is usually only to transfer files to multiple devices separately. This method Greatly reduced file transfer efficiency and improved file transfer time. [0003] At present, there are many solutions for file transfer technologies, such as the familiar ftp protocol, which can reliably complete file transfers, but these well-known file transfer protocols generally only support reliable single-point file transfers. If you need to transfer the same file to multiple devices The files need to be transferred multiple times, which not only improves the file transfer efficiency but also incr...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many solutions for file transfer technologies, such as the familiar ftp protocol, which can reliably complete file transfers, but these well-known file transfer protocols generally only support reliable single-point file transfers. If you need to transfer the same file to multiple devices files need to be transferred multiple times, which not only improves file transfer efficiency but also increases unnecessary traffic burden

[0004] In order to solve this problem, a reliable multipoint file transfer protocol has been proposed: Simple Multicast File Transfer Protocol. Although this protocol can complete reliable multipoint file transfer, this protocol relies on IP multicast technology to limit the application scenarios. Every time the protocol transmits a data packet, all devices that receive the file need to reply with confirmation data. Only after receiving the confirmation data from all devices will the next data segment be sent. Once a device receives a problem, it needs to retransmit the data packet.

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