NDLI: Investigating the effect of handoff algorithms on the performance of CBTC systems using physics-based propagation models

Content Provider	IET Digital Library
Author	Sood, Neeraj Baroudi, Sami Zhang, Xingqi Liebeherr, Jörg Sarris, Costas D.
Abstract	The performance of communication-based train control (CBTC) systems, in terms of frequency of handoffs [changing association from one access point (AP) to another] and duration of service interruptions, strongly depends on the employed handoff algorithm. In this study, the received signal strength used for the calculation of these metrics is generated by a custom vector parabolic equation (VPE) solver explicitly developed to achieve high accuracy in complex tunnel environments. The authors demonstrate that VPE is as effective and accurate as measurements in estimating the performance of CBTC systems. Additionally, they present a methodology for selecting a handoff algorithm that most enhances the performance of a CBTC system, where APs have already been deployed. The impact of handoff algorithms on system performance is investigated by considering multiple system configurations in a 5 km, curved, rectangular tunnel. A multiple-attribute decision making approach is presented to rank handoff algorithms based on their performance. To validate this proposed simulation-based framework, a CBTC system deployed in the London Underground is presented, where measurement-based ranking is compared against the one derived using VPE simulations.
Starting Page	1065
Ending Page	1071
Page Count	7
ISSN	17518725
Volume Number	13
e-ISSN	17518733
Issue Number	Issue 8, Jul (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/13/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2018.6115
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2019-03-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	CBTC System Combinatorial Mathematics Communication-based Train Control System Custom Vector Parabolic Equation Decision Making Electromagnetic Wave Propagation Employed Handoff Algorithm Fuzzy Set Theory Geotechnical Structure Handoff Algorithm Handoff Algorithm That Most Enhances Handoffs Measurement-based Ranking Mobile Radio Mobile Radio System Mobility Management Multiple System Configurations Parabolic Equation Physics-based Propagation Model Radio Wave Propagation Railway Communication Size 5.0 Km System Performance Tunnels Underground Communication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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