Ntt Docomo, Inc.

Kota Fujimura

Katsuhiro Noguchi

Takashi Suzuki

Kazuyuki Kozu

Masashi Kanauchi

Mikio Iwamura

Minami Ishii

Sadayuki Abeta

Kenichiro Aoyagi

Keisuke Suzuki

Takaaki Sato

Itsuma Tanaka

Masafumi Masuda

Kazunori Obata

Hiroaki Yamagishi

Atsushi Ueki

Ryo Kitahara

Hideyuki Sakuramoto

Shinpei Kawakatsu

Yutaka Ohto

Takuya Takimoto

Tetsuto Shimomura

To transmit a 'CELL UPDATE message' in a radio access network not supporting 'Additional Dynamic Transport Format Information for CCCH,' a mobile station UE according to the present invention includes a transmitting unitconfigured to transmit a &#x201c;CELL UPDATE message&#x201d; to a radio access network in a &#x201c;CELL UPDATE procedure,&#x201d; and the transmitting unitincludes a predetermined information element in the &#x201c;CELL UPDATE message&#x201d; only when the radio access network supports the &#x201c;Additional Dynamic Transport Format Information for CCCH.&#x201d;

Mobile station

A communication method according to the present invention includes: transmitting, at a radio base station device (b), broadcast information for notifying a first area and a second area; transmitting, from a first mobile terminal to a radio control device (c), a first location registration request signal for the first area included in the broadcast information, when the first area is not identical to a first area stored as a current location registration area; and transmitting, from a second mobile terminal to the radio control device (c), a second location registration request signal for the second area included in the broadcast information, when the second area is not included in a second area group stored as a current location registration area.

Communication method, mobile terminal, switching device, and radio control device

A packet communication method of the present invention includes a step of: receiving, at a mobile station (UE), restriction information for accepting an incoming call and restricting an outgoing call; establishing, at the mobile station (UE), a control path with a packet exchange (SGSN) in response to incoming of paging for the mobile station (UE); sending, the packet exchange (SGSN), a message instructing to establish the data path via the control path; and establishing, at the mobile station (UE), the data path by calling to the packet exchange (SGSN), when the mobile station (UE) receives the message after the mobile station (UE) has received the restriction information.

Packet communication method and mobile station

In a mobile communication system, the radio device RNC, Node B includes: a creation unitconfigured to create, on the basis of the notification information received from the distribution server, simplified information indicating content of the notification information, and detailed information indicating content of the notification information with a greater amount of information than that of the simplified information; a simplified information transmitter unitconfigured to transmit the simplified information to the mobile station by use of a control channel for starting the broadcast communication; and a detailed information transmitter unitconfigured to transmit the detailed information to the mobile station by use of a traffic channel for broadcast communication, and the mobile station UE includes: a display unitconfigured to display the received detailed information, after displaying the received simplified information.

Mobile communication system, mobile communication method, radio network controller, radio base station and mobile station

Provided is a mobile station UE equipped with a broadcast information generation unit () which generates broadcast information containing tag information formed by a plurality of bits. The tag information has a value defined only by a plurality of first bit values or by a plurality of first bit values and second bit values. The first bits contain a flag indicating whether the tag information contains the second bits. The broadcast information generation unit () updates the tag information value each time the content of the broadcast information is updated.

Radio base station and mobile station

A mobile station performs location registration to one of exchanges managing a location registration area where the mobile station is located, in a mobile communication system in which a plurality of exchanges manage one location registration area and a radio network controller is connected to the plurality of exchanges. The mobile station includes a communication controller configured to stop transmission of signals to the radio network controller, when an identifier of an exchange notified by an access restriction signal from the radio network controller matches an identifier of an exchange which has performed the location registration of the mobile station.

System and associated method of maintaining packet switching capability in a cellular network

A mobile station is configured to transmit a first location registration related signal addressed to a first exchange to a radio network controller, so as to perform location registration to both the first exchange and a second exchange, when operating in first network operation mode. The mobile station includes a controller configured to transmit a second location registration related signal addressed to the second exchange to the radio network controller, so as to perform the location registration to the second exchange without passing thorough the first exchange, when the mobile station operates in the first network operation mode and when the mobile station receives an access restriction signal for the first exchange from the radio network controller.

Mobile communication method and mobile station

The object of the invention is to allow two systems residing in the same area and same frequency band to be coexistent compatibly with each other while reducing the mutual interference. A radio network controllerfor controlling the broadcast timing when various kinds of broadcast information is broadcast with respect to each of two systems, which reside in the same frequency band of the same area and have common specification for physical layer in a state where all or a part of upper layer protocols have no compatibility, broadcasts various kinds of broadcast information about systemat a predetermined timing. With respect to various kinds of broadcast information about system, broadcast timing information, which is scheduled to be staggered from the broadcast timing of the system, is notified using a part of region of the broadcast information, and the broadcast information of the systemis broadcast at the notified broadcast timing.

Radio network controller and broadcast information transmission method

A radio network controller connected to a first exchange and a second exchange which manage a same location registration area. The radio network controller includes a manager configured to manage a mobile station under control of the radio network controller, in association with the first exchange or the second exchange; a transfer configured to transfer a signal transmitted from the mobile station to the first exchange or the second exchange which is associated with the mobile station; and a monitor configured to monitor state of the first exchange and the second exchange. The transfer is configured to transfer a signal from the mobile station associated with the first exchange, to the second exchange, when the monitor detects inaccessibility to the first exchange.

Mobile communication method and radio network controller

There is provided a neighbor cell notifying apparatus capable of implementing more efficient notification to a mobile station within a range that can be notified of and monitored, when the mobile station in communication using a plurality of cells is notified of neighbor cell information. This neighbor cell notifying apparatus includes a cell information extracting part for extracting neighbor cell information items for specifying respective neighbor cells corresponding to each of the cells; a cell rank determining part for, based on the neighbor cell information items extracted, determining ranks of neighbor cell information items that the mobile station is to be notified of, in favor of neighbor cell information items about neighbor cells common to the cells; and a cell information notifying part for notifying the mobile station of a predetermined number of neighbor cell information items among the neighbor cell information items on the basis of the ranks determined.

Growing community of inventors

Yokosuka, Japan

Kota Fujimura