naa a22 4500 510796443 CHVBK 20180411083338.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s11277-011-0454-9 doi (NATIONALLICENCE)springer-10.1007/s11277-011-0454-9 Optimising CDMA Cell Planning with Soft Handover [Elektronische Daten] [Sasthi Ghosh, Roger Whitaker, Stuart Allen, Steve Hurley] Soft handover (SHO) is one of the fundamental features of code division multiple access (CDMA) systems such as universal mobile telecommunication system (UMTS), and it is affected by the placement and density of cells. Inclusion of soft handover in optimization models for UMTS and CDMA cell site selection and configuration has previously been very limited but it is important for coverage because it can provide gain to the user. Some authors have excluded SHO on the basis of tractability while others have found that omitting SHO in planning gives adequate solutions. As such the incorporation of SHO remains an important component for definitive investigation in optimisation models for cell planning. In this paper we focus on the problem and effect of including SHO in cell planning optimisation. We introduce a new cell planning optimisation model that explicitly incorporates SHO and reduces computational complexity. Exact results can be obtained when the orthogonality factor is zero, while a conservative approximation of interference is used to generate lower bounds on coverage in the general case. We demonstrate the tractability of this model and show that it leads to improved lower bounds for coverage maximisation in network planning. Springer Science+Business Media, LLC., 2011 Cell planning nationallicence Soft handover nationallicence Power control nationallicence Radio network design nationallicence UMTS nationallicence CDMA nationallicence Fade margin nationallicence Ghosh Sasthi Indian Statistical Institute, 203 B. T. Road, 700108, Kolkata, India aut Whitaker Roger School of Computer Science & Informatics, Cardiff University, 5 The Parade, CF24 3AA, Cardiff, UK aut Allen Stuart School of Computer Science & Informatics, Cardiff University, 5 The Parade, CF24 3AA, Cardiff, UK aut Hurley Steve School of Computer Science & Informatics, Cardiff University, 5 The Parade, CF24 3AA, Cardiff, UK aut Wireless Personal Communications Springer US; http://www.springer-ny.com 68/2(2013-01-01), 321-347 0929-6212 68:2<321 2013 68 11277 https://doi.org/10.1007/s11277-011-0454-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-011-0454-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ghosh Sasthi Indian Statistical Institute, 203 B. T. Road, 700108, Kolkata, India aut NATIONALLICENCE 700 1- Whitaker Roger School of Computer Science & Informatics, Cardiff University, 5 The Parade, CF24 3AA, Cardiff, UK aut NATIONALLICENCE 700 1- Allen Stuart School of Computer Science & Informatics, Cardiff University, 5 The Parade, CF24 3AA, Cardiff, UK aut NATIONALLICENCE 700 1- Hurley Steve School of Computer Science & Informatics, Cardiff University, 5 The Parade, CF24 3AA, Cardiff, UK aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 68/2(2013-01-01), 321-347 0929-6212 68:2<321 2013 68 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer