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Service discovery is one of the integral tasks of the system running in distributed computing environment. Even though numerous researches on service discovery have been conducted, the security and privacy issue have not yet been addressed adequately. Here letting only legitimate user and service provider for service discovery is a challenging problem. In(More)
Context awareness service is one of the key features in ubiquitous computing system. In heterogeneous pervasive computing system, effective context modeling and reasoning are important to enable the collaboration and distributed reasoning among the agents. The effectiveness of the previous approaches for distributed reasoning significantly degrades when a(More)
Multi-criteria decision making problem is commonly encountered nowadays for making decisions under the presence of multiple alternatives with regards to relevant criteria. The existing approaches are limited because of unquantifiable and incomplete information in typical environment. Furthermore, the fuzziness and vagueness of human judgment and preference(More)
Nowadays, handover is a critical issue for real-time applications in wireless networks. In this paper we propose more efficient handover solution with reducing the number of handover packet for the mobile station (MS) in handover process to scan. It is based on a concept of BSs channel information with a group-based scan technique. The base stations (BSs)(More)
Handover is a critical issue for wireless networks of various protocols including IEEE 802.16e. In this paper we propose an efficient handover scheme which reduces the number of packets required to be transmitted for handover and increases the channel availability. It is based on a concept of group-based channel scan and scheduled handover with the mobile(More)
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