| With the rapid development of computing technology and wirelesscommunication technology, mobile computing as a new computing mode emerges asthe time requires, at the same time, along with the promotion of applications, mobilecomputing mode has realized leaping development in the worldwide, and played anvery important role in more and more fields, In order to realize the data access in thisenvironment, mobile database has come into being and continue to grow stronger. Inmobile computing environment，due to the mobile computing with mobility, lowbandwidth, frequent disconnection, asymmetry of network communication,traditional data processing mode can not meet the needs of mobile computingenvironment, in order to resolve the main problem of data consistency in theapplication of Mobile database, so need study deeply of mobile data replicationtechnology based on the characteristics of this kind of environment．This paper mainly researches the mobile information access technologies of theembedded mobile database are facing the key problem: The replication andsynchronization technology of embedded mobile database,firstly,this paper deeplyanalyses replication mechanism and synchronous particle size, on this basis, wepresent a Union Result-Set mobile replication model based on semantic merge.Through merged and optimized based on semantic, the operation adds the amount ofdata transmitted during data synchronization and improves the network utilizationand transmission efficiency. At the same time, this paper has deeply studied thereplication conflicts, then addresses a new transaction time limited maximumconflicts detection and resolution mechanism based on semantic merger．Themechanism saves the space of the buffer area and the time of the conflicts detection,and Improves the utilization of the cache, And the biggest advantage is to a certaindegree to keep the transaction from aborting, which could have past the conflictsdetection, and to Improve the efficiency of the global submit. |
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