Design and Analysis of Concurrency Control Mechanism Using Modified SCC-2S Algorithm in Mobile Environment

Abstract

With the rapid advances in mobile computing technology, there is an increasing demand for processing real-time transaction in a mobile environment. In real-time database use in mobile environments, mobile hosts (mobile users; mobile clients) can access shared data irrespective of their physical location and can be updated by each mobile client independently at the same time. This leads to inconsistency of data. In real-time database use in mobile environments, providing consistency of the data items is a challenging issue in case of concurrent access. Several concurrency control techniques are proposed in literature to prevent data inconsistency. General characteristics of mobile environments like mobility, low bandwidth, limited battery power, limited storage, frequent disconnections etc. makes concurrency control more difficult. We proposed a method that based on Modified SCC-2S Algorithm in JEE architecture. Proposed method Concurrency Control Mechanism using Modified SCC-2S Algorithm solves write-write conflict for real-time database in mobile environment. In proposed system, Fixed Host (FH) has Database System module to perform database operation. Mobile Hosts (MHs) use On-Demand Mode to request data from FH. Therefore, MH can save storage and can live as thin client. Moreover, proposed method provides high respond time, throughput and reduces the number of miss deadlines for closed nested transactions model in mobile environment.