Abstract
Uninterrupted internet services are need of the day and their demand will increase in future by manifold. However, providing uninterrupted services under heterogeneous networks environment is a challenging task. One of the major challenges in this regard is the management of handover system between various networks. This paper proposes a handover management scheme by dividing the total coverage area of the base station (BS) or access point (AP) into three different zones (strong, average, and weak zones), respectively, on the basis of receive signal strength indication (RSSI) to provide fast vertical handover support in heterogeneous wireless networks. Furthermore, a new event is proposed and added to the IEEE 802.21: media independent handover (MIH) standard to integrate the functionality of multithreshold. The proposed scheme is implemented in NS2 and it is shown that our scheme provides a superior performance over the previous methods used for similar purposes.
Highlights
Handover management is one of the most important tasks under the wireless networks which have received a great attention from many researches in recent years [1, 2]
The mobile node (MN) will not wait until the base station (BS)/access point (AP) forwards this event to the media independent information service (MIIS) server as the BS/AP already has the information of new BS
We used a simulation scenario which consists of one universal mobile telecommunications system (UMTS)
Summary
Handover management is one of the most important tasks under the wireless networks which have received a great attention from many researches in recent years [1, 2]. When an MN leaving from one BS to another, it first executes a discovery mechanism for searching nearby BSs and MN makes a connection to it This delay can be minimized by adjusting different factors like RSSI, data rate, available bandwidth, and signal to interference and noise ratio (SINR) from a BS [3, 4]. When an MIIS server is located many hops away, a longer time is required for an MN to get the information of the available networks. In order to provide an efficient solution to above problems, this paper proposes an efficient handover scheme in which a BS collects information of available networks for an MN in advance.
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