Challenges in Data Management . Further , mobile users will have to share their data with others. Several research areas needs to be revisited from the perspective of database systems, such as transaction processing, query processing, and security. Next , we review the existing transaction models for mobile computing and discuss their merits and demerits. While in motion, a mobile host retains its network connections through the support of stationary hosts with wireless connections.
Mobile computing is susceptible to frequent network disconnections.
Besides an increased number of disconnections resulting from site or communication failures, certain other disconnections such as those caused by battery limitations or handoffs are considered predictable. Another characteristic of mobile distributed computing is weak connectivity. Challenges in Data Management . Between these two extremes, connectivity is frequently provided by wireless networks characterized by low bandwidth, high latency or high cost. Challenges in Data Management .