Ntt Mobile Communications Network, Inc.

Mobile Communications Network Inc.

Kazuo Sugiyama

Akihiro Maebara

Koji Sasada

Ichiro Okajima

Shoichi Hirata

Noriko Uchida

Masumi Sotoyama

Kimio Ikeda

Koji Yamamoto

Yasuhiro Kato

Katsumi Kobayashi

Akihisa Nakajima

Akitoshi Miyazaki

Yasushi Nakamura

Atsushi Shimokawa

Syoichi Hirata

Akihiro A-312 Tomioka-Daiichi-Ryo Maebara

Ichiro 305 Isogodokushinryo Okajima

Koji 3B Yamamura-Building Sasada

Yasuhiro 306 Hilltop Kasumigaoka Kato

An object of the present invention is to reduce the control time required when a channel handover is performed in a mobile communication system. The conventional system has such shortcomings that a long time is required for re-designating a channel when a channel handover procedure results in failure. Particularly, in the common access type system, there is such a problem that since a channel handover is required to be performed several times during a channel handover procedure, an extra time is required for performing the handover procedure. The present invention has a plurality of base stations for covering the service area, and a mobile station for performing a communication with the base stations through radio channels. Here, the present invention is characterized in that the base stations notify the mobile station of a plurality of candidates when the mobile station performs a handover procedure, thereby improving the problem inherent in the conventional system that a single candidate is notified when a channel handover procedure is performed. Therefore, the present invention makes it possible to change the channel to the next candidate channel at high speed when the previous channel handover procedure results in failure.

Mobile communication system, network and mobile station

System and method for controlling voice and data communications

Packet transfer scheme and mobile communication system

Mobile communication systems sharing a control channel

A mobile communications network and a mobile communication method for reducing loads to be incurred to the mobile communications network which loads occur because the user changes its mobile communication terminal. Mobile communication terminal numbers of mobile communication terminals (21), (22), IDs of users (31), (32) of the mobile communication terminals, and at least one address to be used by each user when the user performs a communication. The mobile communications network comprises an address/user corresponding table (13) having a table for bringing addresses to be used in each of the multiple communication methods and a user ID into corresponding relation. When a terminating request specifying an address is made, a user ID corresponding to the specified address is obtained using the address/user corresponding table. Further, a mobile communication terminal number is retrieved using a user/mobile communication terminal corresponding table (14) for bringing the user ID and the mobile communication terminal number into a corresponding relation, then a mobile location area of the mobile communication terminal corresponding to the user ID is read, and the incoming signal is terminated in the mobile communication terminal using the mobile communication terminal number and the mobile location area.

Mobile communications network and mobile communication method

Growing community of inventors

Kashiwa, Japan

Kazuo Sugiyama