Area Difference Based Recovery Information Placement for Mobile Computing Systems

In a mobile computing system, mobile hosts may move around cells, resulting in a considerable cost for locating and retrieving the recovery information, which is necessary for fault tolerance. To speed up the recovery, traditionally, recovery information is migrated according to the location of the mobile host. In this paper, a scheme for efficiently handling the recovery information is proposed. When a mobile host moves out of a certain range, only partial recovery information of the mobile host needs to be migrated to mobile support stations. It can avoid the unnecessary migration of recovery information. Moreover, the performance of the proposed scheme is evaluated and compared with the traditional movement based scheme.