Overview of handoff schemes in cellular mobile networks and their comparative performance evaluation

The GSM, CDMA cellular systems are most trendy 2G and 3G digital cellular telecommunications systems, which is widely used throughout the world. These systems have many advantages such as high security, higher quality of call transmission over the long distances, low transmitted power, and enhanced capacity with more efficient utilization of the frequency spectrum. With these advantages these cellular systems have attracted more subscribers with more attention in the field of mobile communications. One of the most attractive features of cellular system is handoff which is a continuation of an active call when the mobile is moving from one cell to another without disconnecting the call. Usually, continuous service is achieved by efficiently designed handoff algorithms. So, efficient handoff algorithms are necessary for enhancing the capacity and QoS of cellular system. In this paper, the handoff analysis for GSM, CDMA cellular networks are done under various propagation models. Various handoff algorithms of GSM are described and also a novel received signal strength (R SS ) based GSM handoff algorithm with adaptive hysteresis is analyzed. CDMA Soft handoff algorithm is analyzed and effective soft handoff parameters are estimated for better performance. The Comparison of handoff algorithms is studied based on results. Keyword:CDMA GSM Hard handoff R SS Soft handoff

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“…It minimizes the unnecessary handoffs [10]. This method hysteresis is fixed that means the hysteresis value is either small or large.…”

Section: Gsm Handoff Algorithmsmentioning

confidence: 99%

A Comparative study on Handoff Algorithms for GSM and CDMA Cellular Networks

Neeraja

Rao

2017

IJECE

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“…For the purpose of enhancement of handover strategies many innovative experiments are discussed by expert authors in the papers [6][7][8][9]. In paper [10] authors have discussed various handoff schemes and compared their performances. They have compared the performances of RSS, RSS with threshold and RSS with hysteresis and threshold in terms of various handover initiations.…”

Section: Related Workmentioning

confidence: 99%

An Enhanced Handover Strategy for GSM-R Technology

Bhattacharya

2012

2012 Third International Conference on Computer and Communication Technology

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Global System for Mobile Communications for Railway (GSM-R) technology plays an important role on high speed railway communication; but the handover technique demands betterment in high speed railways. This paper enhances the handover algorithm for GSM-R technology by applying a newly proposed Dynamic Handover Margin Evaluation(DHME) technique that provides ping-pong effect free dynamic handover margin according to the vehicle speed, establishing a new Group handover algorithm which is inspired by Bully's Algorithm for coordinator selection. Bully's Algorithm for coordinator selection in distributed system is implemented here for user grouping to reduce the number of handover requests in mobile networks. So congestion is reduced in a particular BTS. This paper also proposes a priority handover scheme based on Guard Channel Method (GCM) suitable for GSM-R technology. Finally the paper by using MATLAB 7.0 analyses the handover request dropping rate for GSM-R by applying DHME and group handover algorithm, which results in the reduction of handover request dropping rate by 58% approximately.

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“…Because dropping the call is unacceptable, the process of handoff was created. Handoff occurs when the mobile telephone network automatically switch an active call from one cell to another, the switching of current communication channel could be terms of time slot, frequency band or code word to a new base station [2][3][4][5] Call drop is one of the most important quality of service indexes for monitoring performance of a cellular networks. For this reason, the objective of this paper is to investigate the number of call drops in a given GSM network, analyze it and recommend possible ways of minimizing it within the network so as to help the operator's network planning team to plan upgrading when necessary.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Call Drop in a Cognitive GSM Network

Adigwe¹,

Theophilus²

2015

CAE

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Investigation of call drop is categorized as network monitoring and evaluation, whose focus is to evaluate the performance of the quality of service (QOS) of a radio network in terms of call drop rate. The data used for this work was retrieved from a recording and monitoring customized software called FACTS integrated in the MTN network life node Base station controller (BSC) located along BeninAsaba Expressway with over 70 Base station transceivers (BTSs) connected to it. The data was measured on a daily, weekly and Monthly interval for clear understanding of the analysis. This network experienced its highest call drop rate between 3pm and 4pm with about 44% calls dropped in a day, 25.2% calls dropped on Monday within a week and 24.156% calls dropped in December in a six Months period. This excessive call drop was a result of insufficient BTSs, unavailability of Spares to replace defective ones, longer response time for handoff request and improper matching of BTSs and even Master switching centre (MSC) leading to poor or delay handshaking among BTSs and BSCs. KeywordsCall performance index, Call drop rate, Node, Handover success rate and FACTS.

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Overview of handoff schemes in cellular mobile networks and their comparative performance evaluation

Cited by 38 publications

References 10 publications

A Comparative study on Handoff Algorithms for GSM and CDMA Cellular Networks

A Comparative study on Handoff Algorithms for GSM and CDMA Cellular Networks

An Enhanced Handover Strategy for GSM-R Technology

Investigation of Call Drop in a Cognitive GSM Network

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