Architecture and Mobile IPv6 extensions supporting mobile networks in mobile communications. - Ichiro Okajima; Narumi Umeda; Yasushi Yamao (VTC Fall, 2001)

Network architecture for mobile communications systems beyond IMT-2000. - Toru Otsu; Ichiro Okajima; Narumi Umeda; Yasushi Yamao (IEEE Wirel. Commun., 2001)

VoIP Quality Evaluation in Mobile Wireless Networks. - Pei-Jeng Kuo; Koji Omae; Ichiro Okajima; Narumi Umeda (IEEE Pacific Rim Conference on Multimedia, 2002)

Handoff performance of mobile host and mobile router employing HMIP extension. - Koji Omae; Masahiro Inoue; Ichiro Okajima; Narumi Umeda (WCNC, 2003)

Mobility anchor point discovery protocol for hierarchical mobile IPv6. - Koji Omae; Ichiro Okajima; Narumi Umeda (WCNC, 2004)