Article

Signal threshold adaptation for vertical handoff in heterogeneous wireless networks

Mobile Networks and Applications (Impact Factor: 1.05). 08/2006; 11(4):625-640. DOI: 10.1007/s11036-006-7326-7
Source: DBLP

ABSTRACT

Abstract The convergence of heterogeneous wireless access technologies has been envisioned to characterize the next generation wireless networks. In such converged systems, the seamless and efficient handoff between different access technologies (vertical handoff) is essential and remains a challenging problem. The heterogeneous,co-existence of access technologies with largely different characteristics results in handoff asymmetry,that differs from the traditional intra-network handoff (horizontal handoff) problem. In the case where one network is preferred, the vertical handoff decision should be carefully executed, based on the wireless channel state, network layer

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    • "In the mobility management protocol stack of both the MN and network element the MIH Function (MIHF) is a new function located as a shim layer in between the Layer 2 and Layer 3 as shown in Fig. 1.MIHF interacts with different MAC layers of heterogeneous networks, manages them through the MIH service access points (MIH LINK SAP), and exchange information to the upper layer users (MIH SAP), such as MIP, SIP. [3] [4]. However the problems of such wireless networks is that they do not tend to handle handovers takes places in wireless network due to the frequent movements of mobile nodes. "

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    • "(6) where is the window size defined as follows: = 10, (7) and denote RSS sampling interval and averaging distance, respectively [14] "
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    ABSTRACT: This paper aims to improve the handover performance in the heterogeneous networks (HetNet). Since achieving high data rates, low signaling load, and better coverage area are highly dependent on the number of handovers, reducing the number of unnecessary handovers is crucial for both mobile users and the whole network. In this paper, a new decision-making algorithm based on joint traffic and propagation metrics is proposed for HetNets that can reduce the number of unnecessary handovers in comparison with the traditional handover algorithms especially when the femtocell assignment probability is relatively high. We further analyze the handover probability for the proposed scheme which is in a close agreement with simulation results. Simulation results show that a higher assignment probability to femtocell BS is achieved in the proposed algorithm. We also show that the proposed scheme reduces the number of unnecessary handovers compared to the conventional RSS-algorithm.
    Full-text · Conference Paper · Dec 2015
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    • "The constantly changing environment is demanding for more and more services. In such a condition to maintain the required grade of services in a region is a driving force for the technology developer to split a region for handling the traffic increased without increasing the bandwidth of the system [3]. A BS is accountable for forwarding information and voice packets among a MNS/MN and a fixed network. "

    Preview · Article · Jan 2015 · International Journal of Advanced Computer Science and Applications
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