Strategy of Conflict Preprocessing and Reconciliation for Mobile Databases

Mobile computing is characterized by limited resources on mobile client, frequent disconnection and limited bandwidth of mobile communication, and the heterogeneity between different mobile database products. Aimed at the defects existed in current technologies of synchronizing replication for mobile databases, a new model of transaction synchronization and replication is proposed. The conflict processing strategy is emphatically analyzed and the implementation algorithm is presented in detail. The conflict preprocessing mechanism based on user-concerned data and transaction-related-set is adopted and executed before conflict detection and resolution in the model, which effectively saves the storage resources on mobile client and mobile communication bandwidth, reduces the workloads and error possibility of mobile server, decreases the complexity of the conflict detection and resolution algorithm. The conflict reconciliation strategy based on rule simplifies conflict processing and enhances the efficiency of synchronization and replication. In addition, the implementation method of the model using SyncML protocol has the generality and adaptability for different types of major heterogeneous database products.