We propose location-mediated service coordination in ubiquitous computing. In the coordination, middle agents determine bestmatched services for a user by considering the user’s location based on location-ontology for ubiquitous computing. Introducing such location-aware middle agents and location-ontology into ubiquitous computing, we can extend application areas of software agents from the In...

Location-based service (LBS) is booming up in recent years with the rapid growth of mobile devices and the emerging of cloud computing paradigm. Along with the challenges to establish LBS and the user privacy issue becomes the most important concern. So successful privacy-preserving LBS must be secure and provide accurate query results. In this paper we present a solution to one of the location...

This paper proposes a new proactive mobility management mechanism. Instead of traditional mobility management system that when a user wants to connect another it needs to lookup the current location of the called user from the remote home location register (HLR) of the called user, the proposed method provides a special proactive location service to the close friends, who satisfy certain charac...

UMTS is expected to offer a powerful environment for location based multimedia services. We have specified such a service, using the packet switched domain of UMTS and overlaying standards like SIP and OSA/ Parlay. LoL@ (Local Location Assistant) is a showcase for future UMTS services and their requirements. It proposes an architecture for location based multimedia services, including advanced ...

Web services are independent programmable application components which scatter over the Internet. Due to the improvement on local computing power and development on high-speed Internet, network latency has a significant impact on determining the service response time. Thus, physical locations of web services and users should be taken into account for web service composition. In this paper, we p...

Searching books in large libraries can be a difficult task for novice library users. This paper presents SmartLibrary, a location-aware mobile library service demonstrated in the main library of the University of Oulu. The service provides map-based guidance to books and collections on a PDA. SmartLibrary is a completely software-based solution, which can be provisioned atop a WLAN installed fo...

With the advent of mobile computing devices and cheap location sensing systems, location information has become an important resource both for mobile and`desktop' users. In this paper, we describe some key concepts a scalable ubiquitous location service should be based on. Firstly, we show how such a service can accommodate multiple location sensing systems. Secondly, we discuss hierarchy-based...

In this paper, we study two implementations of a mobile agent location service in the context of an underlying ad hoc network. More precisely, this service aims at solving the problem of routing an agent toward a target agent in order to cooperate on a common host. Both the migration number and the tracking time must be minimized by such a service. We compare two implementations based on rumor ...

An important class of location-based services answers the question, "What instances of this service are closest to me?" Examples include finding restaurants, gas stations, stores, automated teller machines, wireless access points (hot spots), or parking spaces. Currently, the Location-to-Service Translation (LoST) protocol only supports mapping locations to a single service based on service reg...

Compared with topology -based routing, location-based routing scales much better in large-scale mobile ad hoc networks. Location-based routing protocols assume that a location service is available to provide location information of each node in the network. Many location service protocols have been proposed in the literature. However, either they do not scale well in large-scale network environ...