An evaluation of centralized and distributed service locationprotocols for pervasive wireless networks

摘要

Ad-hoc networks are infrastructureless networks formed on-the-flyby devices with wireless communication capabilities. They have bandwidthand device power limitations, as well as the need to deal with mobility.If client server interactions are to be present in such networks, amethod for performing service location is needed. When two nodes thatare several hops apart communicate, resources on all the intermediatenodes are wasted, so it is better to find services that are "closer" tothe clients. This paper evaluates distributed and centralizedarchitectures for service location. In particular it examines serviceavailability and message overhead performance using simulations. Thefindings reveal the best approach that can be used as an underlyingstructure for higher layer service location protocols