Takeo ICHIKAWA


Throughput Improvement of Mobile Cooperative WLAN Systems with Identifying and Management of Starved APs/UEs for 5G
Akiyoshi INOKI Hirantha ABEYSEKERA Munehiro MATSUI Kenichi KAWAMURA Takeo ICHIKAWA Yasushi TAKATORI Masato MIZOGUCHI Akira KISHIDA Yoshifumi MORIHIRO Takahiro ASAI Yukihiko OKUMURA 
Publication:   
Publication Date: 2017/08/01
Vol. E100-B  No. 8  pp. 1366-1376
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System)
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
5Gwireless LANthroughput starvationCSMA/CA
 Summary | Full Text:PDF(2.8MB)

User Equipment Centric Downlink Access in Unlicensed Spectrum for Heterogeneous Mobile Network
Riichi KUDO B. A. Hirantha Sithira ABEYSEKERA Yusuke ASAI Takeo ICHIKAWA Yasushi TAKATORI Masato MIZOGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/10/01
Vol. E98-B  No. 10  pp. 1969-1977
Type of Manuscript:  Special Section PAPER (Special Section on 5G Radio Access Networks―Part II: Multi-RAT Heterogeneous Networks and Smart Radio Technologies)
Category: 
Keyword: 
heterogeneous networkCSMA/CAunlicensed spectrumwireless LANRXOPhidden terminal problem
 Summary | Full Text:PDF(3.4MB)

Implementation and Evaluation of Real-Time Distributed Zero-Forcing Beamforming for Downlink Multi-User MIMO Systems
Tomoki MURAKAMI Koichi ISHIHARA Riichi KUDO Yusuke ASAI Takeo ICHIKAWA Masato MIZOGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/10/01
Vol. E96-B  No. 10  pp. 2521-2529
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2012)
Category: Wireless Communication Technologies
Keyword: 
multiuser MIMOinter-cell interferencedistributed systemwireless LAN system
 Summary | Full Text:PDF(4.7MB)

Performance Evaluation of Interference-Aware Multi-Cell Beamforming for an Overlapping Cells Environment
Tomoki MURAKAMI Riichi KUDO Takeo ICHIKAWA Naoki HONMA Masato MIZOGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/06/01
Vol. E96-B  No. 6  pp. 1492-1501
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMOmulti-cell beamforminginter-cell interference (ICI)WLANdecentralized control scheme
 Summary | Full Text:PDF(4.2MB)

Proposal of Wireless Traffic Control Schemes for Wireless LANs
Takefumi HIRAGURI Takeo ICHIKAWA Masataka IIZUKA Shuji KUBOTA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/05/01
Vol. E91-B  No. 5  pp. 1340-1348
Type of Manuscript:  Special Section PAPER (Special Section on Communication Quality)
Category: QoS Control Mechanism and System
Keyword: 
wireless LANIEEE802.11traffic controlload barancingQoS
 Summary | Full Text:PDF(1.1MB)

Novel Multiple Access Protocol for Voice over IP in Wireless LAN
Takefumi HIRAGURI Takeo ICHIKAWA Masataka IIZUKA Masahiro MORIKURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/10/01
Vol. E85-B  No. 10  pp. 2145-2152
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
wireless LANCSMA/CAVoIPH.323
 Summary | Full Text:PDF(825KB)

A Multi-Slot Access Protocol for TDMA-TDD Packet Radio ChannelApplication to PHS Packet Data System
Hidetoshi KAYAMA Takeo ICHIKAWA Hitoshi TAKANASHI Masahiro MORIKURA Toshiaki TANAKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/05/25
Vol. E81-B  No. 5  pp. 1115-1125
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
packet radioaccess protocolTDMA-TDDmulti-slot channel
 Summary | Full Text:PDF(1MB)

Performance Evaluation of a Packet Channel Sharing Protocol for Dynamic Channel Assignment Systems
Takeo ICHIKAWA Hidetoshi KAYAMA Masahiro MORIKURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/03/25
Vol. E81-B  No. 3  pp. 616-624
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
packet radio communicationsDCAPHSrandom access
 Summary | Full Text:PDF(758.9KB)