Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Blackberry Corporation

Research in Motion Corporation

Kazuhito Niwano

Hideji Wakabayashi

Miho Maeda

Hiroaki Nagano

Tatsuhiko Ikeda

Mitsuru Mochizuki

Yoshinori Matsunami

Shinjirou Fukuyama

Koutarou Sugisawa

Yasushi Kinoshita

Hirokazu Shimizu

A mobile station includes a radio link control unit for outputting or inputting data that are transmitted or received via a radio channel to or from a higher-level protocol layer, a media access control unit for outputting or inputting the data via a logical channel to or from the radio link control unit, a physical layer control unit for outputting or inputting the data via a transport channel to or from the media access control unit, and for controlling radio communications, and a radio resource control unit for outputting or inputting control data to or from the radio link control unit, media access control unit, and physical layer control unit. The mobile station multiplexes report information therefrom into a channel for packet data transmission so as to transmit it to a base station. The base station carries out assignment of radio resources using the report information.

Mobile station, base station, communications system, and communications method

A transmission control method includes a step of selecting transmission control information according to a combination of user data transmitted, via a transport channel, from an upper layer, and a step of transmitting the transmission control information, as well as a physical channel into which two or more transport channels are multiplexed, to a fixed station, the transmission control information including at least transmit power information.

Transmission control method, mobile station, and communication system

A mobile station includes an amount-of-data information determining means for monitoring data which are stored on a communication-service-by-communication-service basis or on a transmit-channel-by-transmit-channel so as to determine communication-service-by-communication-service or transmit-channel-by-transmit-channel amount-of-data information. The mobile station transmits the communication-service-by-communication-service or transmit-channel-by-transmit-channel amount-of-data information determined by the amount-of-data information determining means to a base station.

Mobile station, base station, communication system, amount-of-data information transmission method, transmission-control-information notification method, and wireless communication method

A scrambler performs IQ multiplexing of output signals from a spreader and a distributor in order to generate a complex signal (I signal and Q signal), amplitude coefficients &#x3b2;cc(I) and &#x3b2;cc(Q) are determined in accordance with signal powers on I axis and Q axis.

Mobile station, base station, communication system, and communication method

According to a communications method according to the present invention, data is transmitted from a base station to two or more terminals via a common channel, and transmission power, with which the data is transmitted from the base station to the two or more terminals, is controlled according to a reception state of at least one of the two or more terminals. Furthermore, the terminal transmits reception capability information at a time of selection combining, and at least one of the two or more base stations receives the reception capability information at the time of selective combining and notifies the reception capability information to a radio network controller (RNC) which controls the two or more base stations. When a connection request is issued to the terminal, the RNC refuses assignment of a dedicated channel to the connection request when determining that the assignment of the dedicated channel to the terminal cannot be done based on the reception capability information at the time of selective combining.

Communications system, communications apparatus, communications terminal and communications method

For lack of a unique, specific and detailed specification for information on status of a mobile station to be notified by a mobile station to a fixed station, an operation may be varied from one mobile station to another in a communication system, thereby posing a problem for an efficient uplink scheduling. A communication method includes a transmission process multiplexing a transport channel for transmitting data from a high-order layer on a physical data channel and transmitting the multiplexed result to the fixed station, a status notification process notifying status information containing information on a transmission power headroom used for scheduling, and a transmission control process receiving the scheduling result and controlling the transmission process. The status information notification process includes notifying an index attached to each predetermined transmission power headroom level classified between upper and lower limit values of the transmission power headroom as the status information.

Communication method

Conventionally, there is a problem that a state transition of E-TFC changes according to QoS for descriptions of data to be transmitted, and therefore a mobile station's operation is not decided uniquely. To solve this problem, a transmission control method includes a step of selecting transmission control information according to a combination of user data transmitted, via a transport channel, from an upper layer, and a step of transmitting the transmission control information, as well as a physical channel into which two or more transport channels are multiplexed, to a fixed station, the transmission control information including at least transmit power information.

Communication method, mobile station, and communication system

A mobile station includes a radio link control unit for outputting or inputting data that are transmitted or received via a radio channel to or from a higher-level protocol layer, a media access control unit for outputting or inputting data via a logical channel to or from the radio link control unit, a physical layer control unit for outputting or inputting the data via a transport channel to or from the media access control it and for controlling radio communications, and a radio resource control unit for outputting or inputting control data to or from the radio link control unit, media access control unit, and physical layer control unit. The mobile station multiplexes report information therefrom into a channel for packet data transmission so as to transmit it to a base station. The base station carries out assignment of radio resources using the report information.

A communication system includes mobile stations carrying out transmission at report cycles selected from a group consisting of 0, 1 and other integers without having a relation of a multiple and including a lot of prime numbers.

Growing community of inventors

Tokyo, Japan

Kazuhito Niwano