Presentation 2017-05-26
[Technology Exhibit] Prototype of USIM Sharing Terminal Enabling Simultaneous Use of Multiple Networks during International Roaming in Next-Generation Mobile Communication System
Kazuo Ibuka, Homare Murakami, Kentaro Ishizu, Fumihide Kojima,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) The frequency used in the mobile communication system typified by LTE (Long Term Evolution) is diversified. Therefore, it is difficult to handle all of them with one terminal. As a result, a business operator operating a mobile communication network based on a mobile communication system is forced to create a terminal specialized for the corresponding frequency for its own network. Due to the restriction of the corresponding frequency, there arises a problem that international roaming greatly limits the options of the partner. Furthermore, in the next generation mobile communication system, mismatching of the corresponding frequencies of the international roaming destination network and the terminal expands because it tries to secure a desired band by aggregating more frequencies. As a consequence, there arises a problem that securing of a desired band becomes more difficult. Therefore, as a countermeasure against this, the authors are considering a system that can secure a desired communication band by simultaneously using a plurality of mobile communication networks and effectively utilizing the corresponding frequencies of the terminals. In this paper, in order to verify the system, we have prototyped a terminal that enables simultaneous connection to multiple networks by a single USIM (Universal Subscriber Identity Module), so we report its outline and verification results.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) USIM Sharing / Authentication / Multiple Networks / Simultaneous Use / International Roaming
Paper # SR2017-11
Date of Issue 2017-05-18 (SR)

Conference Information
Committee SR
Conference Date 2017/5/25(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Tokyo big sight
Topics (in Japanese) (See Japanese page)
Topics (in English) Technical Exhibition, etc.
Chair Takeo Fujii(Univ. of Electro-Comm.)
Vice Chair Kenta Umebayashi(Tokyo Univ. of Agric. and Tech.) / Masayuki Ariyoshi(NEC) / Suguru Kameda(Tohoku Univ.)
Secretary Kenta Umebayashi(Shinshu Univ.) / Masayuki Ariyoshi(NICT) / Suguru Kameda
Assistant Kazuto Yano(ATR) / Mamiko Inamori(Tokai Univ.) / Hiroyuki Shiba(NTT) / Gia Khanh Tran(Tokyo Inst. of Tech.)

Paper Information
Registration To Technical Committee on Smart Radio
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) [Technology Exhibit] Prototype of USIM Sharing Terminal Enabling Simultaneous Use of Multiple Networks during International Roaming in Next-Generation Mobile Communication System
Sub Title (in English)
Keyword(1) USIM Sharing
Keyword(2) Authentication
Keyword(3) Multiple Networks
Keyword(4) Simultaneous Use
Keyword(5) International Roaming
1st Author's Name Kazuo Ibuka
1st Author's Affiliation National Institute of Informaion and Communications Technology(NICT)
2nd Author's Name Homare Murakami
2nd Author's Affiliation National Institute of Informaion and Communications Technology(NICT)
3rd Author's Name Kentaro Ishizu
3rd Author's Affiliation National Institute of Informaion and Communications Technology(NICT)
4th Author's Name Fumihide Kojima
4th Author's Affiliation National Institute of Informaion and Communications Technology(NICT)
Date 2017-05-26
Paper # SR2017-11
Volume (vol) vol.117
Number (no) SR-56
Page pp.pp.59-65(SR),
#Pages 7
Date of Issue 2017-05-18 (SR)