Information synchronization method and system, set top box and server in IPTV (Internet Protocol Television) system

Abstract

The invention discloses information synchronization method and system, a set top box and a server in an IPTV (Internet Protocol Television) system, wherein the method comprises the following steps that the server acquires a system check word according to the user information and the channel information of the server side; the set top box receives a response message returned by the server and containing the system check word; the set top box generates a local check word according to the user information and the channel information cached in local, and the system check word is matched with the local check word; and when the system check word is not matched with the local check word, the set top box sends a synchronization request to the server, downloads the user information and the channel information from the server and caches the user information and the channel information. The invention can know whether the information cached in local is up to date or not according to the system check word in the response message issued by the server; and if not, the synchronization request is issued in time for updating. The scheme does not have great influence on the performance of the EPG (Electronic Program Guide) server.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, relates to an information synchronization method and system in an IPTV system, a set-top box and a server. Background technique [0002] In the IPTV (Internet Protocol Television, Internet Protocol Television) system, the information exchange between the EPG (Electric Program Guide, electronic program guide) server and the STB (Set Top Box, set-top box) mainly includes: STB initiates HTTP (HyperText Transfer Protocol , hypertext transfer protocol) requests to the EPG server to obtain content information, the content information includes information such as a program list of a certain channel, and the EPG server returns a content response message; STB periodically reports status information to the EPG, and the EPG server returns a status response message . [0003] In order to improve user response speed, channel information and user information are generally ...

AI Technical Summary

Problems solved by technology

However, the information currently cached in the STB is difficult to update

Specifically, since all business requests of STB are realized by initiating short connections through HTTP, the EPG server cannot notify STB in reverse. After the server-side information is updated, the EPG server cannot notify STB to update

If an inquiry is made to the EPG server specifically to detect whether the information is updated, it will have a very large impact on the performance of the EPG server

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