A NEW HIERARCHICAL TRANSACTION MODEL FOR MOBILE ADHOC NETWORK ENVIRONMENT

Mobile Computing Environment poses its unique challenges to the existing Transaction models which are fail to solve. The main challenges of mobile computing environment are its heterogeneous environment, low bandwidth and power resources. The transaction must be able to handle frequent disconnection because mobile user can move anywhere. In this paper, I presented a transaction model for mobile adhoc network environment. In this hierarchical model transaction is performed in distributed fashion by the nodes in a MANET. Basically three types of nodes in this transaction model-Captain, Player and Data Manager. Data manager is maintained into hierarchy-Global, Zonal and Local. Players play the role under the supervision of Captain. Mobile Nodes can access data directly with Local data Manager. The data manager is used maintaining the data and log for recovery. In the previous model for transaction there is no criterion for recovery, in this model I resolve this problem with hierarchical structure of data manager. Key Word: MANET, DSM-CTM, System Architecture. INTRODUCTION Mobile Adhoc Network is future technology; various challenges are superimposed by this technology. MANET inherited the challenges from cell architecture in addition bandwidth and highly dynamic topology and battery back up problem. MANET is used where no infrastructure is available for communication such like disastrous area, military application, sensor network. A mobile Transaction is structured as a Distributed transaction. In which the transaction is completed by the help of mobile nodes and some fixed nodes. Fixed nodes are used to hold the data and mobile nodes are to initiate the transaction. The mobile environment produces the significant challenges to transaction processing. The wireless networks provide limited bandwidth so network bandwidth is a scarce resource. Battery power drains with data transmission and transaction processing.