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Method and system for transmitting chain of messages for database

A technology of database and chain transmission, applied in the field of database update process and system

Inactive Publication Date: 2008-01-09
NAGRAVISION SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this solution is that the length of the maximum chain is determined according to the available memory

Method used

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  • Method and system for transmitting chain of messages for database
  • Method and system for transmitting chain of messages for database

Examples

Experimental program
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Embodiment Construction

[0033] In Fig. 1, the different modules participating in the link function in a message are shown. We find a first header module HD which describes the kind of message and contains information indicating that this message is part of a certain link. In order to form the link, a second family module FM indicates the family to which this message belongs. In fact, several links can be sent simultaneously and in this case the series must be authenticated. Where a series is defined, the subsequent module FI is used to identify the individual elements of the series and their position in the chain. So, for both data, the individual cells of the series can again be placed end-to-end with other cells of the same series if necessary. Known is the maximum number of units used to indicate series in one or the other control module FI or FM. This function can also be achieved by specifically marking the last unit of the series.

[0034] In the example of FIG. 2, the message of FIG. 1 sta...

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Abstract

The invention concerns a method and a system for transmitting a chain of messages for updating a database between a management centre and a plurality of geographically distributed subscriber databases. Each message comprises a chain identifier (FM) and a chain index (FI) for identifying the message in the chain. If a message is not received following a disturbance in the connection, the processing of the next messages can block the databases. In order to remedy that inconvenience, the solution consists in assigning to each message a block status (CD) which determines whether said message is to be processed without referring to the members of the chain and what are the conditions concerning the prior processing of members of the chain.

Description

technical field [0001] The present invention relates to a database update process and system, and more particularly to a process and system during message chain transmission. Background technique [0002] In a system comprising a management center and a plurality of widely distributed users, it is known to send or hertz route the database update information of these users by telephone. These messages are sent to all or a specific user, ie the message contains a user module address. [0003] These messages are used for system administration and are themselves superimposed with useful data such as video, audio or data. It is understood that the applicability of these messages is limited. Another limitation concerns the length of the message, which is the limitation imposed by the instantaneous interruption of useful data. It will be appreciated that in the case of audio / video transmission, the transmission channel can only be interrupted momentarily to ensure that no visual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06G06F9/445H04N7/24H04N7/52H04L12/18G06F17/30G06FG06F13/00H04L
CPCG06F13/00G06F17/30G06F1/00H04N7/24H04N1/00H04L12/18G06F9/445H04L1/00H04L29/06H04N7/52G06F16/27H04L51/216H04N21/6547H04N21/4181
Inventor 克里斯托弗·尼考拉斯迈克尔·J·希尔
Owner NAGRAVISION SA