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Paper Abstract and Keywords
Presentation 2015-03-20 13:45
Accuracy Evaluation of Ray-Tracing Method with Rounded-Shape (RS) Model for Non Line-Of-Site (NLOS) Route in Street Cell Environment
Nobutaka Omaki, Koshiro Kitao, Tetsuro Imai, Yukihiko Okumura (NTT DOCOMO)
Abstract (in Japanese) (See Japanese page) 
(in English) In 5G mobile communication system, it is one of the most important issues to clarify the propagation characteristics in the high-SHF (above 6 GHz) and EHF (mainly 30 – 60 GHz) bands. For the purpose, authors have conducted measurement in the street cell environment and the accuracy of Ray-tracing (RT) has been evaluated by comparing with the results for these frequency bands. It has been found that the difference between measurement result and RT calculation increases as frequency becomes high in Non Line-Of-Site (NLOS) scenario. In order to correct the difference, we have proposed to implement RT calculation by replacing a conventional box-shape model of right angle wedge with alternative model called Rounded-shape (RS) model with curved surface for building at the intersection. In this report, RT simulation with RS model is implemented including multi-path effect for several different NLOS routes. Frequency dependency of the difference is evaluated by comparing with measurement result. Based on the evaluation, finally, optimal parameter of RS model is discussed for the better RT calculation. Further consideration of ray composition is also discussed.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile communication / High-SHF/EHF bands / Ray-tracing / 5G mobile communication system / METIS / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 522, AP2014-222, pp. 61-66, March 2015.
Paper # AP2014-222 
Date of Issue 2015-03-12 (AP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee AP  
Conference Date 2015-03-19 - 2015-03-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Fukui University, Bunkyou Campus 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2015-03-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Accuracy Evaluation of Ray-Tracing Method with Rounded-Shape (RS) Model for Non Line-Of-Site (NLOS) Route in Street Cell Environment 
Sub Title (in English)  
Keyword(1) Mobile communication  
Keyword(2) High-SHF/EHF bands  
Keyword(3) Ray-tracing  
Keyword(4) 5G mobile communication system  
Keyword(5) METIS  
1st Author's Name Nobutaka Omaki  
1st Author's Affiliation NTT DOCOMO INC. (NTT DOCOMO)
2nd Author's Name Koshiro Kitao  
2nd Author's Affiliation NTT DOCOMO INC. (NTT DOCOMO)
3rd Author's Name Tetsuro Imai  
3rd Author's Affiliation NTT DOCOMO INC. (NTT DOCOMO)
4th Author's Name Yukihiko Okumura  
4th Author's Affiliation NTT DOCOMO INC. (NTT DOCOMO)
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Date Time 2015-03-20 13:45:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2014-222 
Volume (vol) IEICE-114 
Number (no) no.522 
Page pp.61-66 
#Pages IEICE-6 
Date of Issue IEICE-AP-2015-03-12 

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