Performance evaluation framework for vertical handoff algorithms in heterogeneous networks

Zahran, Ahmed H.; Liang, Ben

doi:10.1109/icc.2005.1494342

Cited by 61 publications

(36 citation statements)

References 13 publications

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“…A number of studies published earlier have surveyed VHD algorithms [MZ04,ZL05,SNW06]. In the earliest one [MZ04], a tutorial on the design and performance issues of VHD policies is presented along with the analysis and comparison of several VHD algorithms.…”

Section: Overview Of Vhd Algorithmsmentioning

confidence: 99%

Optimization of vertical handover decision processes for Fourth Generation heterogeneous wireless networks

Yan¹,

Şekercioğlu²,

Narayanan³

2011

2011 7th International Wireless Communications and Mobile Computing Conference

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This thesis presents a vertical handover decision (VHD) scheme for optimizing the efficiency of vertical handover processes in the Fourth Generation (4G) heterogeneous wireless networks. The scheme consists of three closely integrated modules: Handover necessity estimation, handover target selection, and handover triggering condition estimation. Handover necessity estimation module determines whether a handover is necessary to an available network. Handover target selection module chooses the "best" network among the available candidates based on a set of criteria. Finally, handover triggering condition estimation module determines the right moment to initiate a handover out of the currently connected network.4G wireless networks are expected to support mechanisms for tight integration and cooperation of divergent access network technologies. In such networks of heterogeneous nature, roaming users will experience frequent handovers across network boundaries. Thus, to ensure seamless roaming and efficient resource usage over dissimilar networks, intelligent VHD algorithms need to be used extensively. The research project presented in this thesis report focuses on this problem and provides an optimized VHD scheme, which minimizes the handover failures, unnecessary handovers and connection breakdowns whilst maintaining users' satisfaction at high levels. In addition, the scheme also provides mechanisms for mobile applications to control the tradeoff between the usage of the preferred access network and number of handovers or connection breakdowns.Simulation based performance evaluations demonstrate that the scheme reduces the number of handover failures, unnecessary handovers and connection breakdowns by up to 80%, 70% and 70%, respectively. They also show an increase of up to 50% in the satisfaction level of users.

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Section: Overview Of Vhd Algorithmsmentioning

confidence: 99%

Optimization of vertical handover decision processes for Fourth Generation heterogeneous wireless networks

Yan¹,

Şekercioğlu²,

Narayanan³

2011

2011 7th International Wireless Communications and Mobile Computing Conference

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“…An example of such techniques is the adaptive lifetime-based vertical handoff (ALIVE-HO) scheme proposed by Zahran et al [25], [24]. While considering delay, authentication, and service initiation, the ALIVE-HO scheme used the RSS to estimate how long a MT's needs can be served by a WLAN which helped in the handoff decision.…”

Section: Related Workmentioning

confidence: 99%

“…As with other wireless communication technology, the main point is the Received Signal Strength (RSS). In the following paragraphs, we discuss the equations used to compute SINR and RSS for both network types under consideration [23], [24], [3], [4].…”

Section: A Signal Propagation Modelmentioning

confidence: 99%

Improving Vertical Handoffs Using Mobility Prediction

Al‐Ayyoub¹,

Husari²,

Mardini³

2016

ijacsa

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Abstract-The recent advances in wireless communications require integration of multiple network technologies in order to satisfy the increasing demand of mobile users. Mobility in such a heterogeneous environment entails that users keep moving between the coverage regions of different networks, which means that a non-trivial vertical handoff scheme is required in order to maintain a seamless transition from one network technology to another. A good vertical handoff scheme must provide the users with the best possible connection while keeping connection dropping probability to the minimum. In this paper, we propose a handoff scheme which employs the Markov model to predict the users' future locations in order to make better handoff decisions with reduced connection dropping probability and number of unnecessary handoffs. Through simulation, the proposed scheme is compared with the SINR-based scheme, which was shown to outperform other vertical handoff schemes. The experiments show that the proposed scheme achieves significant improvements over the SINR-based scheme that can reach 51% in terms of the number of failed handoffs and 44% in terms of the number of handoffs.

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“…Zahran et.al. 20 proposed an algorithm for 3G and WLAN networks, which is based on RSS in combination with an Estimated lifetime of the available bandwidth to decide the time of handover, which enhances the bandwidth utilization.. But there is an increase in packet delay that increases with the lifetime of the connectivity due to the changes in t h e channel condition as the mobile Terminal approaches the edge of the WLAN cell.…”

Section: Birdview Of Vertical Handovermentioning

confidence: 99%