Ntt Docomo, Inc.

Hironari Kobayashi

Hiroshi Nakamura

Kazuhiro Watanabe

Takaaki Sato

Masafumi Masuda

Kazuyuki Kozu

Akira Kaiyama

Takeshi Sugiyama

Toyota Nishi

Toru Hasegawa

Keiji Machida

Tooru Hasegawa

Makoto Shoji

Hiroshi Matsunaga

When the priority class is set to a mobile terminal that has moved from cell to cell and even if an HLR is in a congestion state, a communication service is provided to the mobile terminal on a priority basis. A location registration signal, which is transmitted from a mobile terminal () that has moved from another area, and which is to be transmitted to an HLR (), is received, and the apparatus corresponding to the movement source area is identified based upon the content of the location registration signal. Priority class information indicating whether the transmission process to the HLR is a priority process or a non-priority process is acquired from the identified another mobile communication control apparatus (), and whether or not the location registration signal should be transmitted to the HLR () is determined based upon the acquired priority class information.

Registering a mobile terminal in a visited network based on a priority class downloaded from a mobile network

The unnecessarily increase of the information amount of subscriber information retained by a local subscriber information management device is prevented even if the number of subscribers increases, so that the limit of the number of subscribers is extended to support the increasing number of subscribers without increasing the capacity of subscriber information retaining means in the local station (local subscriber information management device). Based on information contained in subscriber management informationincluding information representing each mobile terminalacquired by local stationsof a mobile communication systemand subscriber information corresponding to each mobile terminal, the relevant subscriber management informationare selected and processed to be prevented from being retained after call control is performed according to the acquired subscriber management information.

Mobile communication system, local subscriber information management device, and communication information management method

A disclosed mobile radio communications system comprises an exchange station; first and second radio base stations configured to radio-communicate with a mobile station and configured to relay data from the mobile station; first and second radio control stations configured to wire-communicate with the first and second radio base stations, respectively, and configured to establish a wired communication path for relaying the data transmitted from the mobile station to the exchange station; a transmission device configured to wire-communicate with the first and second radio base stations, and configured to establish a local wired communication branch for relaying the data transmitted from the mobile station between the first and second radio base stations without going through the first or second radio control station; a third radio base station configured to radio-communicate with the mobile station, configured to relay the data transmitted from the mobile station, and incapable of communicating with the transmission device; and a third radio control station configured to wire-communicate with the third radio base station, and configured to establish a wired communication branch for relaying the data transmitted from the mobile station to the exchange station. A method of adding a radio communication branch comprises the step of, when a request for adding a radio communication branch through the third radio base station is generated while the data transmitted from the mobile station is being relayed via the local wired communication branch, determining whether to reject the request, based on a radio quality parameter between the mobile station and the third radio base station.

Mobile communications system and communication branch establishing method

A mobile communication service control system according to the present invention has a home location registerstoring subscriber information, a switching unitfor sending a subscriber information inquiry signalto the register, and a service control unitfor controlling a service provided for subscribers. The home location registerstores service informationnecessary for a start of control of the service at the service control unitand sends the service informationalong with a response signalto the subscriber information inquiry signalto the switching unit. The switching unittransfers the service informationreceived from the register, to the service control unit

Mobile communication service control system and mobile communication service control method

Growing community of inventors

Iruma, Japan

Hironari Kobayashi