Accepted Papers

  • Authentication and Key Agreement in 3GPP Networks
    Krishna Prakash and Balachandra ,MIT Manipal , India

    The huge demand for mobile communications with broad band and usage of new wireless applications motivated the development of new wireless access technologies. The recent expansion of wireless technologies and novel applications and the advancement in mobile technology after UMTS-3G has been taken up to the next level by the 3GPP Long Tem Evolution/System Architecture Evolution (LTE/SAE). It has achieved the realisation of better bandwidth, full interworking with other access/backend systems using all-IP architecture with well-defined interworking with circuit switched system. The system is defined to work across multiple access networks (3GPP and non 3GPP) may be trusted or non-trusted. The security mechanism in wireless area has evolved from original analog systems through GSM and UMTS. The GSM has focussed the security for radio path whereas UMTS has enhanced it in to network functionalities. The future networks based on IP mechanism demands more security features, since the threats related to IP are also possible.

  • Link Quality Based Multihop Relay Protocol For Wimedia Medium Access Control
    Umadevi K S and Arunkumar Thangavelu , VIT University, Vellore, India

    WiMedia Alliance has been widely adopted in personal area networks for high data transfer with low energy consumption based applications. The Multihop support provided by WiMedia is limited to 3-hop distance and seeks significant interest from researchers. This paper is aimed at addressing the following issues by two fold approach. In the first part, we propose a Multihop routing algorithm for n-hop support to analyse the protocol and also achieved higher throughput and minimum delay. Further, we tested the performance of the algorithm by implementing the protocol to test the quality of outcomes. The results indicate that the proposed algorithm facilitates better utilization of resources and helps improving the network life time for high data rate.

  • Effect of Rigidity on Trilateration Technique for Localization in Wireless Sensor networks
    Saroja Kanchi , Kettering University, USA

    The localization of wireless sensor networks is an important problem where the location of wireless sensors is determined using the distance between sensors. Trilateration is a geometric technique used to find location of points in 2D using distances. Using geometry, one can find the location of a point uniquely in 2D given its distance to three other points in 2D. The problem of finding the trilateration order of vertices even if the network of sensors is a uniquely localizabe is NP-Complete. The 2D localization problem is closely related to the problem of graph rigidity. A graph can be uniquely realized in 2D if and only if the underlying network graph is globally rigid. Therefore by examining the structure of the underlying graph for rigidity and localization guided by rigidity is another technique used in localization. We study the performance of trilateration which is based on geometry and local information to see if it is effected by graph rigidity which is a global property. In particular, we compare the performance of the trilateration on connected non-rigid networks and connected rigid networks. We focus on sparse networks graphs of lower radius.