Research and realization of consistent maintenance of the mobile data replication based on the user semantics rules and transaction engine

In mobile database system, normally duplicate and synchronous replicate are adopted to improving the processing efficiency. The past researches seldom touched the relation between the time of duplicate update and mobile application semantics nor how to resent the semantics of the week consistence of duplicate. In order to demonstrate the application semantics, and further reduce the communication flux, and realize that user can define the condition of disconnect-connect by himself and thus solve the problem of mobile data replication synchronization and update under this mechanism. Experimental data shows that this mechanism can improve the efficiency of client processing distributed transaction operation.