Mobile database synchronization method and system based on knowledge base under network-free environment

Abstract

The invention discloses a mobile database synchronization method and a mobile database synchronization system based on a knowledge base under a network-free environment and provides a traceable synchronization method based on a time stamp and an authority level, which serves as a data conflict solving method; and the data synchronization conflict caused by long-term off-line operation of mobile equipment under the network-free environment can be greatly solved.

Description

technical field [0001] The invention relates to the technical field of mobile database synchronization, in particular to the mobile database synchronization in a non-network environment. The mobile database synchronization can be based on a knowledge base. Background technique [0002] A mobile database refers to a distributed database in a mobile environment. Its data is physically distributed and logically centralized. It is a dynamic distributed database. The mobile database can support mobile users to effectively access the required data and complete data query and transaction processing under the wireless network environment. Since the mobile database needs to store the data copy on the terminal device, when multiple users update the same tuple of the data copy, data conflicts may occur. Existing database vendors all provide their own mobile data synchronization components to solve possible data conflicts, but these synchronization components are all based on public wi...

AI Technical Summary

Problems solved by technology

Since the mobile database needs to store data copies on the terminal device, when multiple users update the same tuple of the data copy, data conflicts may occur

Existing database vendors provide their own mobile data synchronization components to solve possible data conflicts, but these synchronization components are based on public wireless network environments

[0003] In some special scenarios where wireless network access is limited, such as: high-security sensitive places that need to shield wireless signals, areas where wireless networks are paralyzed due to natural disasters or man-made sabotage, etc., mobile terminals are required for on-site office work and need to communicate with the background The system uploads, downloads, and synchronizes data. At this time, the existing mobile database and its synchronization technology cannot meet the needs

[0004] Moreover, the existing mobile database synchronization methods, such as time stamp method, authority method, semantic method and random number method, are difficult to be suitable for every application field as a general method. When data conflicts occur, manual participation is still required in many cases to eliminate conflicts. , resulting in a low global commit rate for the mobile database system

In a no-network environment, since the mobile database needs to be operated offline for a long time, each data copy is opaque to each other before the final global submission, and the data timeliness is worse than when the wireless network is weakly connected. Generic synchronization methods eliminate, therefore, the need to introduce decision-making mechanisms for handling data conflicts in the application domain

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