Discovering Architecture Formalism of Geo-Located Web Services for Next Generation of Mobile Networks

Abstract

Geo-located web services are web services offered in a particular geographical region. In mobile application design, a geo-located web service can be mapped to a set of mobile network location areas. As a mobile client roams in a mobile network, if he has a geo-located web service in execution progress at a supplier application server (SAS), he will lost its session in case when its current location is not covered by this SAS. With the next generation (third and up) of mobile networks, the geographical position of a mobile client will be sent back by a LoCation Server (LCS) to an application which requests it. As many geo-located web services will be deployed in the future, the great challenge for a mobile client will be to discover and maintain a geo-located web service when he is roaming. We propose a new system named Geo-Located Web Service Architecture (GLWSA) that aims to discover and maintain a geo-located web service with or without QoS at the nearest SAS of a mobile client current location. The GLWSA is a set of discover servers named GLWSMs (Geo-Located Web Service Manager) which are distributed in the topology. The GLWSA extends the UDDI and MLP protocols to add the GLWSM topology management and the thematic location of a mobile clients group, respectively. A thematic location consists of sending to a LCS, a chain of characters that represents a theme or a subject linking a group of mobile clients. In this paper, we present the GLWSA concepts and its mathematical formalism. Tests executed to evaluate the system performance prove that the GLWSA concepts are adequate to discover geo-located web services.Key wordsGeo-located servicesNext generation mobile networksService discoveryWeb servicesQuality of services