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Information Networking. Towards Ubiquitous Networking and Services, International Conference, ICOIN 2007, Estoril, Portugal, January 23-25, 2007. Revised Selected Papers; 01/2007
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ABSTRACT: In this paper, we propose the mobility agent based handover decision algorithm. Mobile agent performs a handover technique based on the utility function for mobile devices equipped with multi mode interfaces. Utility function utilizes Shannon's formula adopting the minimum required bandwidth and signal to interference plus noise ratio (SINR). The proposed algorithm supports the handover which is considering the best network based on utility function when the mobile terminals handover from fixed network to mobile networks. In order to evaluate the performance, we compare the proposed algorithm against traditional algorithms. Simulation results show that the proposed handover decision algorithm improves the handover blocking probability and throughput
Wireless Communications, Networking and Mobile Computing, 2006. WiCOM 2006.International Conference on; 10/2006
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ABSTRACT: In this paper, we present fast handover mechanism for seamless connectivity and QoS support between fixed and mobile networks. The proposed mechanism utilizes the mobile-assisted and mobility agent-initiated handover strategy. Based on proposed mechanism, when disconnection occurs without the prediction in fixed networks, multi-homing and pre-allocation of new care-of-address is performed through handover decision. In performance evaluation, we simulate the handover latency time as the offered traffic load increases. The proposed mechanism is compared against traditional handover mechanism. Simulation result using OPNET shows that the proposed mechanism improves handover latency time in broadband convergence network environment
Wireless Communications, Networking and Mobile Computing, 2006. WiCOM 2006.International Conference on; 10/2006
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ABSTRACT: In this paper, we present FBAC (flexible bound admission control) algorithm using softness profile to reduce handover blocking probability over WLAN and WAAN (Wide area access network). FBAC algorithm utilizes dynamic resource allocation scheme to decrease the blocking probability of vertical handover connections within the limited capacity of system. Based on FBAC algorithm, we derive the handover blocking probability as new traffic load and handover traffic load increase. In order to evaluate the performance, we compare FBAC algorithm against traditional non-bounded and fixed bound schemes. Numerical results show that the FBAC scheme improves handover blocking probability in heterogeneous wireless networks
Communications, 2006. APCC '06. Asia-Pacific Conference on; 09/2006
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ABSTRACT: In this paper, we propose that mobility agent based handover selection algorithm for handover from fixed network to mobile network. We showed that the proposed handover selection algorithm has lower blocking probability.
Optical Internet and Next Generation Network, 2006. COIN-NGNCON 2006. The Joint International Conference on; 08/2006
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ABSTRACT: In this paper, we present flexible bound resource admission control algorithm using softness profile to reduce handover blocking probability over heterogeneous network environment in BcN.
Optical Internet and Next Generation Network, 2006. COIN-NGNCON 2006. The Joint International Conference on; 08/2006
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ABSTRACT: This paper proposes low latency handover procedure for seamless connectivity and QoS support between wired (e.g. Ethernet) and wireless (e.g. WLAN, WiBro (802.16-compatible), CDMA) networks by the mobile-assisted and server-initiated handover strategy. It is assumed that the server decides the best target network considering network status and user preferences. In this procedure, a mobile terminal associates with the wireless link decided at the server in advance and receives CoA as well. When handover occurs without the prediction in wired networks, the server performs fast binding update using physical handover trigger through the MIH (media independent handover) function. As a result, a mobile terminal does not need to perform L2 and L3 handover during handover so that this procedure decreases handover latency and loss
Advanced Communication Technology, 2006. ICACT 2006. The 8th International Conference; 03/2006
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Management of Convergence Networks and Services, 9th Asia-Pacific Network Operations and Management Symposium, APNOMS 2006 Busan, Korea, September 27-29, 2006, Proceedings; 01/2006
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Emerging Directions in Embedded and Ubiquitous Computing, EUC 2006 Workshops: NCUS, SecUbiq, USN, TRUST, ESO, and MSA, Seoul, Korea, August 1-4, 2006, Proceedings; 01/2006
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ABSTRACT: Various mechanisms have been proposed to support mobility during handoff to increase the utilization of resources. However, once a resource request by these mechanisms is satisfied, the mobile terminal (MT) utilizes the resource without any consideration for the speed of the MT and the distance of the overlapped region. Within the scope of the mechanisms, if a MT requests a resource grant to a new cell, the rejection of the new handoff request is virtually unavoidable. In this paper, we show that if the speed of MT is sufficiently slow over the distance in the concerned overlapped region, a resource request for another MT is allowed during the delay of a new request, providing more efficient resource management during handoff. The proposed scheme in this paper considers the speed of a MT and the distance in overlapped region during handoff and hence shows that not only can the utilization of wireless resources improve, but the handoff blocking probability reduces as well when adapting this scheme
Advanced Communication Technology, 2005, ICACT 2005. The 7th International Conference on; 02/2001
