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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 16 of 16  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
RCS, NS
(Joint)
2017-12-15
10:30
Hiroshima Aster Plaza [Invited Lecture] Realization of Network Slice in 5G Mobile Core
Takeshi Usui, Yoshinori Kitatsuji (KDDI Research) NS2017-134 RCS2017-260
Recently, the research and development, and standardization regarding the 5th generation mobile network (5G) have been a... [more] NS2017-134 RCS2017-260
pp.43-46(NS), pp.55-58(RCS)
NS, ASN, RCC, RCS, SR
(Joint)
2017-07-20
15:25
Hokkaido Hokkaido Univ. [Invited Talk] Outlook of the fifth Generation Mobile Communication System and Mobile Core Network Operations
Ryota Mizutani, Takeshi Usui, Yoshinori Kitatsuji (KDDI Research) RCC2017-39 NS2017-60 RCS2017-131 SR2017-54 ASN2017-48
 [more] RCC2017-39 NS2017-60 RCS2017-131 SR2017-54 ASN2017-48
pp.145-150(RCC), pp.159-164(NS), pp.199-204(RCS), pp.157-162(SR), pp.177-182(ASN)
ICM 2017-03-10
18:00
Okinawa Miyakojima Marine Terminal Bldg. Automatic generation method of workflow utilized in verification of Openstack operation
Ryota Mizutani, Takeshi Usui, Yoshinori Kitatsuji (KDDI Research, Inc.) ICM2016-71
 [more] ICM2016-71
pp.105-109
IA 2015-08-25
17:05
Tokyo IIJ Seminar Room (Iidabashi Grand Bloom 13F) A Resource Estimation Method Considering Terminals Communication Initiation Delay in Virtualized EPC
Ryota Mizutani, Takeshi Usui, Takeshi Kubo, Yoshinori Kitatsuji (KDDI Lab.) IA2015-27
Due to the high usability of smartphones, various applications running in the smartphones are rapidly increase. Although... [more] IA2015-27
pp.47-52
IN, NV
(Joint)
2015-07-17
17:00
Hokkaido Hokkaido University On Resource Estimation Method Preventing Degradation of Waiting Time of User in Virtualized EPC
Ryota Mizutani, Takeshi Usui, Yoshinori Kitatsuji (KDDI Lab) IN2015-38
As Long Term Evolution (LTE) develops, mobile devices start to use various kinds of the applications. Nowadays, the burs... [more] IN2015-38
pp.91-96
ICM 2015-03-20
14:50
Okinawa Ishigaki-City-Hall [Encouragement Talk] Proposal and Evaluation of Redirect Process for Congestion Tolerance of EPC Signaling by Using Network Function Virtualization
Takeshi Usui, Yujin Noishiki, Takeshi Hashimoto, Yoshinori Kitatsuji (KDDI Lab) ICM2014-72
Virtualized functions of EPC(Evolved Packet Core) which is mobility management system in LTE(Long Term Evolution) have b... [more] ICM2014-72
pp.109-114
ICM 2014-03-14
16:00
Okinawa   Congestion Control of EPC Signaling by Using Network Function Virtualization
Takeshi Usui, Yujin Noishiki, Takeshi Hashimoto, Yoshinori Kitatsuji (KDDI Labo) ICM2013-75
(To be available after the conference date) [more] ICM2013-75
pp.137-142
IA, SITE, IPSJ-IOT [detail] 2013-03-14
17:15
Nara Todaiji Total Cultural Center A Server Configuration with Autonomous Session State Migration to Demand Fluctuation
Takeshi Usui, Masahiro Jibiki (NICT), Yusuke Sakumoto (Tokyo Metropolitan Univ.), Chisa Takano (Hiroshima City Univ.), Masaki Aida (Tokyo Metropolitan Univ.), Nozomu Nishinaga (NICT) SITE2012-60 IA2012-98
Optimal server consolidation is attracting attention for energy saving. The service access increases or decreases in num... [more] SITE2012-60 IA2012-98
pp.133-138
NS, IN
(Joint)
2013-03-08
10:00
Okinawa Okinawa Zanpamisaki Royal Hotel Predictive Discarding of Registration for Fast Recovery of IMS-based Services
Takeshi Usui (NICT), Kohei Sugiyama, Atsushi Tagami (KDDI Lab), Nozomu Nishinaga (NICT) NS2012-277
This paper proposes a method for fast reovery of IP Multimedia Subsystem (IMS) –based services, when the network c... [more] NS2012-277
pp.651-656
IA, SITE, IPSJ-IOT [detail] 2012-03-15
16:45
Hokkaido Hokkaido Univ. Design and Implementation of Service Mobility Middleware with Session State Migration
Takeshi Usui (NICT), Yoshinori Kitatsuji (KDDI Labs), Kiyohide Nakauchi, Yozo Shoji (NICT), Hidetoshi Yokota (KDDI Labs), Nozomu Nishinaga (NICT) SITE2011-41 IA2011-91
We propose a service mobility architecture enabling network service providers (NSPs) to switch a server to which user eq... [more] SITE2011-41 IA2011-91
pp.119-124
MoNA, IPSJ-MBL, IPSJ-DPS 2011-06-03
09:50
Okayama Osaka Univ. 50th Anniversary Hall A Design of Service Mobility Architecture with Session State Migration
Takeshi Usui, Kiyohide Nakauchi (NICT), Yoshinori Kitatsuji, Hidetoshi Yokota (KDDI Lab) MoMuC2011-8
While heterogeneous wireless access environments (e.g., 3G, Wimax and Wifi hotspot) are arranged, the number of the serv... [more] MoMuC2011-8
pp.81-86
IA, SITE, IPSJ-IOT [detail] 2011-03-01
09:00
Kochi Kochi City Culture-Plaza CUL-PORT (Kochi prefecture) Buffered-Packets Releasing Method in Network-based Seamless Handoff for Wireless LAN Networks
Takeshi Usui (NICT), Yoshinori Kitatsuji, Hidetoshi Yokota (KDDI Lab) SITE2010-57 IA2010-93
The seamless handoff technique which keeps the communication of mobile terminals prevents the packet loss by buffering ... [more] SITE2010-57 IA2010-93
pp.123-128
MoNA, IN
(Joint)
2009-11-12
13:00
Fukuoka Fukuoka Institute of Technology A Proposal of Reducing Packet Buffering for Network-based Fast Handover Harmonizing with IMS
Takeshi Usui, Yoshinori Kitatsuji, Hidetoshi Yokota (KDDI R&D Labs,inc) MoMuC2009-42
Proxy Fast Mobile IPv6 (PFMIPv6) which improves the handover durations of Proxy Mobile IPv6 which is network-based hando... [more] MoMuC2009-42
pp.17-22
IA, SITE 2009-03-05
15:00
Kumamoto   On locating lossy segments for SIP signaling message in SIP service
Takeshi Usui, Takeshi Kubo, Yoshinori Kitatsuji, Teruyuki Hasegawa, Hidetoshi Yokota (KDDI lab) SITE2008-50 IA2008-73
Recently, the number of SIP-based communication by Service Providers has been increasing. SIP allows Service Providers t... [more] SITE2008-50 IA2008-73
pp.37-42
NS 2008-10-24
11:45
Osaka Kansai University A study on distributed design of Policy and Charging Rules Function
Takeshi Usui, Yoshinori Kitatsuji, Teruyuki Hasegawa, Hidetoshi Yokota (KDDI Lab) NS2008-87
 [more] NS2008-87
pp.109-112
ICM 2008-03-13
11:15
Okinawa   A study on efficient traffic engineering method for IMS/MMD
Takeshi Usui, Yoshinori Kitatsuji, Teruyuki Hasegawa, Hidetoshi Yokota (KDDI lab) TM2007-56
IMS/MMD is a key technology for NGN, which integrates the fixed network and the mobile network. IMS/MMD adopts a basic ... [more] TM2007-56
pp.19-23
 Results 1 - 16 of 16  /   
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