Ntt Docomo, Inc.

Sung Uk Moon

Takehiro Nakamura

Minami Ishii

Toshiyuki Futakata

Masafumi Usuda

Anil Umesh

Mayu Yamada

Akihito Hanaki

Takayuki Ishiguro

Hiroyuki Ishii

Takahiro Hayashi

Tomohiro Dohi

Shinji Ueda

Yasuhiro Kato

Yoshihiro Ishikawa

Makoto Ito

Yoshimasa Imamura

Yuki Takeda

It is an object of the present invention to provide a mobile station which enables transmission of control information on broadcast communication or multicast communication to a radio network controller without establishing a dedicated channel in broadcast communication or multicast communication. The mobile station related to this invention includes a control information generating unit () for generating control information on broadcast communication or multicast communication, a control information identifier adding unit () for adding a control information identifier for specifying a type of the control information to the control information, and a transmitting unit () for transmitting the control information to a radio network controller (RNC) via a common channel.

Broadcast communication or multicast communication-capable mobile station

The present invention relates to a radio communications system which transmits same downlink information to a plurality of cells by using downlink common channels. The radio communications system includes a radio network controller and a base station. The radio communications system is configured to measure delays between the time when the radio network controller transmits the downlink information and the time when the base station transmits the downlink information to each of the plurality of cells; and to control timing for transmitting the downlink information to each of the plurality of cells by the base station in accordance with measured delays.

Radio communications system, radio network controller and base station

A radio network controller can set up a connection with a mobile station located in a specific cell under control of the radio network controller. The radio network controller includes a connection setup request transmitter configured to transmit a connection setup request for request to set up the connection to the mobile station located in the specific cell; and a judger configured to judge whether or not to need to acquire information of the mobile station located in the specific cell. The connection setup request transmitter is configured to transmit the connection setup request to the mobile station located in the specific cell, when the judger judges to need to acquire the information of the mobile station.

Radio network controller and radio communications method

A notification equipment comprises a transmission data determination unit configured to determine whether transmission data to be transmitted to a terminal equipment is first transmission data or repeated transmission data, an instruction data generator configured to generate identification instruction data indicating that the transmission data is the first transmission data or the repeated transmission data based on a transmission data determination result by the transmission data determination unit, and an instruction data transmitter configured to transmit the identification instruction data to the terminal equipment.

Notification equipment, terminal equipment, communication system and communication method

An acquiring unit () of a reception device acquires, from a transmission device, a notification of re-establishment of data in a lower layer. A notifying/instructing unit () of the reception device notifies, to the transmission device, a sequence number in a higher layer of data which is desired to be received. An RLC processing unit () of the transmission device acquires, from the reception device, a sequence number in a higher layer of data which is desired to be received; and performs the re-establishment from the data having the sequence number.

Reception device, transmission device, communication system and associated methodology for data transmission re-establishment through a lower layer of a transmission protocol

A radio network controller comprises a cell selector configured to select a cell to use by a mobile station after data reception, and a mobile station controller configured to control the mobile station to communicate by radio using the cell selected by the cell selector after the data reception.

Radio network controller, mobile station, and mobile communication method

A radio network controller includes a selection decision unit for deciding whether or not the selection of cells to be used by mobile stations after data reception is to be performed, and a mobile station controller for instructing the mobile stations to select cells to use after the data reception according to a result of a decision by the selection decision unit.

Radio control device, mobile station, and mobile communication method

It is an object of this invention to select an information receiving method at a mobile station (MS) so as to avoid an increase in the transmission power of a base transceiver station (BTS) or redundancy or loss of received information at the mobile station (MS) in broadcast communication or multicast communication. A mobile station according to this invention includes a receiving method selection information acquiring unit () for acquiring receiving method selection information for receiving the same information transmitted via a plurality of cells, and a determining unit () for determining whether to perform soft combining or selective combining on the same information based on the receiving method selection information.

Mobile communication system, mobile station, and radio control device

A mobile communication system for transmitting a plurality of same information to a plurality of cells. The mobile communication system includes a transmission timing determining unit for determining a transmission timing of the same information to each of the cells randomly or in such a manner that transmission timings differ between the cells, and a transmitting unit for transmitting the same information to the cells at the determined transmission timings.

Mobile communication system and radio network controller

The present invention can improve a reception quality of mobile stations and utilize radio resources effectively, by resolving the problem caused when the conventional multicast communications system. The present invention relates to a radio communications system for transmitting same data to a plurality of cells via at least one base station and performing a soft combining or a selective combining on the same data received by a mobile station. The radio communications system includes a controlling unit configured to set up a cycle at which synchronization processing on transmission timing of the same data among the plurality of cells is performed, or an accuracy by which the synchronization processing is performed, for each control apparatus which performs the synchronization processing.

Mobile communication system and control device

There is provided a control device enabling switching of communication of a mobile terminal with one system to communication with another system while reducing power consumption and workload of the mobile terminal. The control device is used in a communication system including a first mobile communication system, a second mobile communication system, and a mobile terminal being in communication with the first mobile communication system. The control device comprises a position measuring unit for measuring the position of the mobile terminal, a judgment unit for making a determination whether or not to switch the communication of the mobile terminal from the first mobile communication system to the second mobile communication system according to a position measurement result of the position measuring unit, and a switching unit for performing the above switching operation according to the determination of the judgment unit.

Control device of mobile communication system

A radio controller includes: a schedule information receiver for receiving schedule information related to a schedule of data transmission; a selection execution determiner for determining, based on the schedule information, whether or not to select a cell used by a mobile station after the data reception; and a selection execution commander for commanding the mobile station to select the cell used after the data reception in accordance with a determination result by the selection execution determiner.

Radio controller, server and mobile communication method

The object of the present invention is to provide a base station, a mobile stationand a radio network controllerwhich can reduce the load on the radio network controllerduring multicast communication. The base stationsupporting multicast communication comprises a response signal relayconfigured to transfer response signals transmitted from a plurality of mobile stationsto a radio network controller. The response signals respond to a control signal for a multicast group. The response signal relaytransfers only a predetermined number of response signals to the radio network controller. Any following response signals are retained.

Base station, mobile station and radio network controller

A radio communication system includes a radio network controller, base stations and mobile stations. The mobile station includes a response signal transmitter which is configured to transmit a response signal including a group ID identifying a multicast group A to a base station. The response signal responds to a control signal for the multicast group A which the mobile station is joining in. The base station includes a response signal transmitter configured to transmit at least one response signal to the radio network controller. The response signal is selected from at least one response signal transmitted from the mobile station joining in the same multicast group A.

Radio communication system, mobile station, base station and radio network controller

A mobile communication system comprises: a determination unit configured to determine as to layers of data to be transmitted by base stations to mobile stations for respective radio areas, based on area resource information concerning radio resources for the respective radio areas covered by the base stations; and a radio transmitter configured to transmit the data to the mobile stations according to a determination of the determination unit.

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Yokosuka, Japan

Sung Uk Moon