Query Management and Spatial Indexing in Mobile Context
Salvijus Laucius, Frédéric Bertrand, Arūnas Stočkus, Alain Bouju · 2003
We present in this paper the principles of dynamic access to geographical information from a mobile client. The client is regarded as having a reduced computing power and a limited data link connection to the data server. Taking into account these constraints, we propose strategies of data management that optimise query execution on the client and data transfer from the server. We show that query’s pre-execution on the client and sending of its result description to the server allows to decrease the amount of exchanged data. Another aspect of queries execution is related to the management of spatial index on the client. We consider two approaches: creating the whole index on the client side independently of the server or partially transferring it from the server and rebuilding it on the client. We present experimental results showing the efficiency of those approaches.