UDP (User Datagram Protocol) downloading method of multi-terminal system

Abstract

The invention discloses a UDP (User Datagram Protocol) downloading method of a multi-terminal system. The UDP downloading method comprises the following steps that: S1, a server issues a data updating notification and total length of data; S2, the server divides data into a plurality of data packets and a terminal acquires packet information of the data according to the total length of the data, issued by the server; S3, the terminal requests the plurality of data packets to the server and the server issues the plurality of data packets to the terminal according to the request; S4, the terminal judges whether to successfully receive all the data packets, and if so, executing S6, and if not, executing S5; S5, the terminal requests data packets subjected to downloading failure to the server, and the server issues the data packets subjected to downloading failure to the terminal according to the request; and S6, the terminal informs the server of completion of data updating. The UDP downloading method disclosed by the invention has the capabilities of greatly lightening the burden of the server on the premise of ensuring the data downloading integrity, optimizing the utilization efficiency of a GPRS (General Packet Radio Service) link, improving the downloading speed and avoiding the traffic waste.

Description

technical field [0001] The invention relates to a UDP (User Datagram Protocol, User Datagram Protocol) downloading method, in particular to a UDP downloading method for a multi-terminal system. Background technique [0002] The so-called multi-terminal system generally refers to a system in which multiple terminals communicate with one server. Because UDP has the advantages of simple operation and high communication efficiency, many multi-terminal systems use UDP to communicate. [0003] However, when the wireless network signal is poor, located in an area with incomplete wireless network coverage, located in an area where the wireless network signal is blocked by obstacles, or the terminal itself has poor reception of the wireless network signal, communication in UDP mode is easy to occur. Serious packet loss problem. [0004] Such as figure 1 As shown, taking the communication between the server and a terminal as an example, the traditional UDP download process includes...

AI Technical Summary

Problems solved by technology

[0016] The technical problem to be solved by the present invention is to overcome the defects that the UDP download method in the prior art will cause the server to be overloaded, the utilization of the GPRS link is not sufficient, and the waste of traffic is to provide a method that can ensure the integrity of the download of data. A UDP download method for multi-terminal systems that greatly reduces the burden on the server, optimizes the utilization efficiency of the GPRS link, improves the download speed, and avoids traffic waste to the greatest extent.

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