Future wireless systems will be characterized by their heterogenity because of advancement in the technology. It integrates different networks to provide seamless internet access for mobile users with multimode access ability. Handover in heterogenous wireless network is an important feature for the mobile terminal. It is a strategy that required to maintain the network connectivity which aims ...

Spectrum handover is a significant topic in the cognitive radio networks to assure an efficient data transmission in the cognitive radio user’s communications. This paper proposes a comparison between three spectrum handover models: VIKOR, SAW and MEW. Four evaluation metrics are used. These metrics are, accumulative average of failed handover, accumulative average of handover performed, accumu...

This paper presents history based broker handover scheme for SCTP (stream control transmission protocol) in order to minimize the handover latency by the ping pong behavior of mobile node. SCTP is alternate protocol to TCP in the transport layer. It has multi-homing feature which provides the mobile node with dual interfaces to minimize the packet loss during handover in the overlapped region. ...

The recent trend is that the mobile internet service has been offered in the integration of various wireless networks. In such heterogeneous networks, vertical handover is more common and important handover technologies. But during vertical handover, standard TCP has experienced many problems such as multiple packet losses, the packet reordering, the under-utilization due to the drastic change ...

Handover mechanism is extremely important in cellular network because of the cellular architecture employed to maximize spectrum utilization. Handover is the procedure that transfers an ongoing call from one cell to another as the user’s moves through the coverage area of cellular system. One way to improve the cellular network performance is to use efficient handover prioritization schemes whe...

In most of the wireless networks, signal strength is considered as the basic criteria to initiate handover. In future generation heterogeneous wireless systems, the vertical handover between different types of networks take place to satisfy demands of users. The location and velocity of mobile terminal is expected to be available in most of the modern systems. The time to reach boundary of serv...

OBJECTIVE To describe the characteristics and barriers in the handover process in a medical intensive care unit. DESIGN A cross-sectional descriptive study using a checklist to observe nurses and doctors during handover of patients in and out of the intensive care unit. SETTING The study was conducted at a 1000-bed tertiary hospital in Singapore. The unit admits all patients under universit...

With the advance of various wireless access technologies, the demand for a mobile user equipped with multiple air interfaces simultaneously executing diverse applications emerged. In such network environments, per-application mobility management is a key to allow each application of an end user device to dynamically and fully take advantage of the most suitable access technology. In this paper,...

The future beyond third generation (B3G) or fourth generation (4G) systems will consist of different radio access technologies, such as GSM/GPRS, UMTS, WiFi, and WiMAX. Many intensive efforts have been made to identify the unsolved issues about the future mobile systems, and one important issue is what the future vertical handover management solution will be. A variety of mobility management so...

The continuation of an active call is one of the most important quality measurement in cellular system. Handoff process enables a cellular system to provide such a facility by transferring an active call from one cell to another. In this paper a new vertical handoff decision algorithm, handover necessity estimation (HNE), is proposed to minimize the number of handover failure and unnecessary ha...