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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 31  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
MVE, IE, CQ, IMQ
(Joint) [detail]
2017-03-06
15:05
Fukuoka Kyusyu Univ. Ohashi Campus A Study on Change-Point Prediction in Mobile Networks
Shinya Wada, Yujin Tang (KDDI Research), Takahiro Matsuda (Osaka Univ.), Haruki Izumikawa, Chihiro Ono (KDDI Research), Tetsuya Takine (Osaka Univ.) CQ2016-118
Traffic volumes in mobile networks could be fluctuated spatiotemporally due to the change of communicational place and s... [more] CQ2016-118
pp.43-47
CQ 2017-01-20
16:25
Osaka Osaka University Nakanoshima Center A Study on Spatio-Temporal Variability of Mobile Access Traffic and Subspace Tracking-Based Change-Point Detection
Takahiro Matsuda, Senri Hirabaru (Osaka Univ.), Yuki Hirota (KDDI), Haruki Izumikawa, Hiroshi Hanano, Chihiro Ono (KDDI Research), Tetsuya Takine (Osaka Univ.) CQ2016-110
In mobile networks, network monitoring for access traffic is important for efficiently utilizing network resources. In t... [more] CQ2016-110
pp.115-120
IE, IMQ, MVE, CQ
(Joint) [detail]
2016-03-08
09:00
Okinawa   A Subspace Tracking-Based Change-Point Detection Scheme for Channel Access Traffic in Mobile Networks
Senri Hirabaru, Takahiro Matsuda (Osaka Univ.), Yuki Hirota (KDDI), Haruki Izumikawa, Hiroshi Hanano, Chihiro Ono (KDDI Labs), Tetsuya Takine (Osaka Univ.) CQ2015-133
 [more] CQ2015-133
pp.141-146
CQ, ICM, NS
(Joint)
2015-11-26
09:40
Niigata Niigata University Uplink Poor Performance Detection for LTE System Based on State Monitoring in Data Connection
Haruki Izumikawa, Yuki Hirota, Hiroshi Hanano, Chihiro Ono (KDDI Labs) CQ2015-76
 [more] CQ2015-76
pp.7-11
MoNA 2015-08-04
14:35
Hyogo Kobe University Centennial Hall (Rokko Hall) [Encouragement Talk] How high is the floor? Floor Height Estimation Based on Mobile Phones with Sensor Data
Haruki Izumikawa, Yuki Hirota, Hiroshi Hanano, Chihiro Ono (KDDI Labs.) MoNA2015-12
We have undertaken research and development with the objectives of making cellular coverage distinctly visible and ident... [more] MoNA2015-12
pp.21-24
IN 2015-01-22
11:35
Aichi Nagoya International Center Bus ride estimation using Cellular Radio Characteristics
Hiroshi Hanano, Haruki Izumikawa (KDDI Labs.), Hiroshi Okada, Yuichi Ishikawa (KDDI), Chihiro Ono (KDDI Labs.) IN2014-101
We have been exploring an O2O (Online-to-offline) service that leverages an electronic coupon on a smartphone and digita... [more] IN2014-101
pp.19-23
IN 2015-01-23
10:45
Aichi Nagoya International Center Online-to-Offline (O2O) Conversion Estimation using Cellular Radio Characteristics
Haruki Izumikawa, Hiroshi Hanano (KDDI Labs.), Yuichi Ishikawa, Hiroshi Okada (KDDI), Chihiro Ono (KDDI Labs.) IN2014-108
We have been exploring an O2O (online-to-offline) service that leverages an electronic coupon on a smartphone and digita... [more] IN2014-108
pp.59-64
IN, MoNA
(Joint)
2014-11-19
10:15
Yamaguchi Simonosekishi-Kinro-Fukushi-Kaikan 3D-LF: Floor Level Estimation Based on the Barometric Pressure in Conjunction with Location Fingerprint
Haruki Izumikawa, Yuki Hirota, Daisuke Kamisaka, Chihiro Ono (KDDI Labs) MoNA2014-54
We have been involved in research and development to estimate the indoor floor level of a mobile terminal equipped with ... [more] MoNA2014-54
pp.31-36
MoNA 2014-07-29
13:50
Aichi Aichi University of Technology [Encouragement Talk] 3D-MDT: What floor was the measurement made in Minimization of Drive Tests?
Haruki Izumikawa, Yuki Hirota, Daisuke Kamisaka, Chihiro Ono (KDDI Labs.) MoNA2014-18
For determining cellular coverage problems efficiently, some studies including MDT (Minimization of Drive-Tests) in 3GPP... [more] MoNA2014-18
pp.9-14
NS, CQ, ICM, NV
(Joint)
2013-11-15
14:55
Nagasaki Goto Islands A Study of Mobile Performance Prediction to Control Wasteful Video Delivery toward GreenICN
Haruki Izumikawa, Hidenori Konishi, Jiro Katto (Waseda Univ.) NS2013-131
With the increasing demand for the energy-efficient communications, we have been tackling the research on the efficient ... [more] NS2013-131
pp.87-90
MoNA, IPSJ-DPS, IPSJ-MBL 2013-05-24
10:10
Okinawa Ishigaki City Hall re-GPS: Repositioning with Move-out Estimation in Minimization of Drive Tests
Haruki Izumikawa, Keizo Sugiyama (KDDI R&D Labs) MoNA2013-8
Some studies, including minimization of drive-tests (MDT) in 3GPP, have considered gathering coverage information such a... [more] MoNA2013-8
pp.113-117
NS, IN
(Joint)
2013-03-08
09:40
Okinawa Okinawa Zanpamisaki Royal Hotel QoE-based Log Collection in Minimization of Drive Tests
Haruki Izumikawa (KDDI Labs.), Ryuichi Yasunaga, Katsuhiro Kujirai, Shigeyuki Terachi, Yoshikazu Shirai (KDDI Engineering), Nao Kobayashi, Keizo Sugiyama (KDDI Labs.) NS2012-227
We have been conducting research into the creation of a coverage map or a map of coverage holes for mobile access system... [more] NS2012-227
pp.361-365
NS 2012-01-27
16:00
Okinawa Ryukyu University [Encouragement Talk] Statistical Estimate in Position of Coverage Holes in Minimization of Drive Tests
Haruki Izumikawa, Takashi Matsunaka, Yoji Kishi (KDDI Labs.) NS2011-175
We have been conducting research into the construction of a coverage map or a map of coverage holes for mobile access sy... [more] NS2011-175
pp.175-178
NS 2012-01-27
16:20
Okinawa Ryukyu University RoCNet: Robust Cellular Network for Disaster Communication and Traffic Offloading
Haruki Izumikawa, Suphakit Awiphan, Jiro Katto (Waseda Univ.) NS2011-176
We have started designing a robust cellular network (RoCNet) that combines infrastructure-based (e.g., cellular) and opp... [more] NS2011-176
pp.179-184
NS 2011-05-19
10:50
Tokyo Sophia University Efficient Construction of Coverage Map Avoiding Positional Gaps
Haruki Izumikawa, Shinobu Nanba, Yoji Kishi (KDDI Labs.) NS2011-19
A coverage map can be constructed by gleaning radio signal quality information, such as RSRP and RSRQ, with location inf... [more] NS2011-19
pp.19-22
NS, IN
(Joint)
2010-03-05
13:00
Miyazaki Miyazaki Phoenix Seagaia Resort (Miyazaki) GREEN-CANES: Adaptive Activation Controls of Macro/Femtocell Base Stations for Energy Savings
Haruki Izumikawa, Yoji Kishi (KDDI R&D Labs.) NS2009-257
Recently, research about energy savings in cellular access networks has been gaining momentum in response to increasing ... [more] NS2009-257
pp.533-536
RCS, AN, MoNA, SR
(Joint)
2009-03-05
15:15
Kanagawa YRP Throughput Estimation Using Average and Standard Deviation of Received SINR for Cellular System with Adaptive-Modulation-and-Coding and ARQ
Riichiro Nagareda, Yoji Kishi, Haruki Izumikawa (KDDI R&D Lab. Inc.,) RCS2008-246
In cellular systems, it is important to design service areas appropriately for providing various services such as voice ... [more] RCS2008-246
pp.203-206
RCS, NS
(Joint)
2008-07-18
14:20
Kyoto Kyoto University Implementation and Experimental Results of Efficient Handover Support Method using Service Area Map in Heterogeneous Networks
Haruki Izumikawa, Yoji Kishi (KDDI R&D Labs.) NS2008-41
The authors have already proposed a handover support method that enables a mobile terminal to select an appropriate acce... [more] NS2008-41
pp.89-94
IN 2008-06-20
13:50
Hokkaido Hokkaido Univ. Study of New Mobile Converged Architecture:SIP-based Cellular Network Extension
Haruki Izumikawa (KDDI R&D Labs.), Shigeru Iwasaki, Junichi Kashima (KDDI), Yoji Kishi (KDDI R&D Labs.), Yuji Sako (KDDI), Riichiro Nagareda (KDDI R&D Labs.) IN2008-22
Recently, with the emergence of a wide variety of access technologies, dual/multi-mode terminals, which have several net... [more] IN2008-22
pp.73-78
NS, IN
(Joint)
2008-03-06
08:20
Okinawa Bankoku Shinryokan Terminal-driven Coverage Area Detection with Low Power Consumption
Haruki Izumikawa, Yoji Kishi, Riichiro Nagareda (KDDI Labs.) NS2007-130
It is necessary to select an appropriate access network out of the several available when a multi-mode terminal is used.... [more] NS2007-130
pp.1-6
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