Research On Transaction Management Model For Wireless Sensor Networks

With the development of wireless sensor networks, it has been becoming increasingly widelyapplied. Wireless sensor networks being data-centered, data reliability in the network nodedetermines the quality of application service. Therefore, it is necessary to conduct study on wirelesssensor network transaction processing technology in order to provide reliable service and to ensuredata consistency and validity. But with such characteristics of wireless sensor networks, as limitedresources and being dynamic, traditional transaction processing model cannot be directly used in thewireless sensor networks. Therefore, this dissertation attempts a study on the transactionmanagement model for wireless sensor networks.In this paper, a transaction management model is designed which includes transactionconcurrency control strategy and transaction atomic commit protocol. In terms of the transactionconcurrency control, the lightweight Forward Oriented Optimistic Concurrency Control (FOCC) isused by combining with the characteristics of wireless sensor networks. In terms of atomic commitprotocol, a two-phase commit protocol is presented which is based on timer and cache (Two PhaseCommit with the Cache and the Timer,2PCwCT). This protocol is an improvement on thetraditional2PC (Two Phase Commit) protocol, providing participants with a caching mechanism forefficient use of radio coordinator information, and reduction of energy consumption. The adoptionof timers with the coordinator and the participants will bring about a unified transaction outcomeafter timers are triggered (commit or cancel). Furthermore, heartbeat algorithms of coordinator areprovided to enhance the reliability of the protocol.The final section of this dissertation gives a description of a complete simulation experiment.This experiment comes to prove that the model in this paper can guarantee the validity of thetransaction processing in wireless sensor networks.