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 |