Abstract
Performance evaluation of handover algorithms has been studied for mobile cellular network. Effects of averaging, hysteresis margin and shadow fading are investigated for different handoff algorithms. Probability of outage, handover delay and average number of handovers are considered as performance metrics. Different handover algorithms considered here are based on relative signal strength with hysteresis, relative signal strength with hysteresis and threshold, absolute signal strength and combined relative and absolute signal strength. Both analytical and simulation methods have been used in this paper. This study is important as performance analyses of cellular system, in presence of handoff, will be important for future generation wireless networks, for example, WiMAX, UMTS.
Highlights
Signal strength at a Mobile Station (MS) depends upon path loss, shadow fading and multipath fading
Performance of handover algorithm can be determined based on criteria viz., number of unnecessary handoffs, probability of outage, average number of handoffs, handover delay, and probability of blocking [7]
Following values are chosen for the analysis purpose: 1) Standard deviation of shadow fading, σ = 6 dB 2) Distance between Base Transceiver Station (BTS), D = 2000 meter
Summary
Guard channel scheme, Queuing of handoff [4]. In execution phase, once the need of handoff is detected, MS receives new channel in association with Base station controller (BSC) and Mobile switching center (MSC). Vijayan et al provides a framework considering level crossing analysis for performance evaluation of handoff algorithms [1]. Performance of handover algorithm can be determined based on criteria viz., number of unnecessary handoffs, probability of outage, average number of handoffs, handover delay, and probability of blocking [7]. We have analyzed the performance of the algorithm based on probability of outage, handover delay, and number of handovers. Effects of shadow fading, averaging interval, hysteresis margin (h) are considered on these parameters. Probability of outage, Pout and probability of handover or assignment, Passn are calculated using simple analytical model considering handover based on absolute signal strength measurements.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
