Database Systems in Mobile
Environments
n Request processing
– power conserving, location dependent, cost efficient
– example: find the fastest way to a hospital
n Replication management
– similar to file systems
n Location management
– tracking of mobile users to provide replicated or location
dependent data in time at the right place (minimize access delays)
– example: with the help of the HLR (Home Location Register) in
GSM a mobile user can find a local towing service
n Transaction processing
– “mobile” transactions can not necessarily rely on the same models
as transactions over fixed networks (ACID: atomicity, consistency,
isolation, durability)
– therefore models for “weak” transaction