Abstract: A wireless communication system is provided in which a plurality of MTC devices can connect to a base station device efficiently. Each of MTC devices in group A that transmits data to the base station device using a predetermined application format is allocated first radio resource common in group A. The MTC device transmits an access request signal to the base station device using the first radio resource. The base station device receives the request signal from the MTC device. The base station device allocates second radio resource common in group A to the MTC device. The MTC device transmits data to the base station device using the second radio resource.

Abstract: A plurality of MTC devices can connect to a base station device efficiently. The base station device allocates first radio resource for allowing transmission of data to, among MTC devices in a predetermined group that transmit data to the base station device using a common application data format, communication devices having a path loss less than a threshold for notification information transmitted from the base station device. The base station device allocates second radio resource for allowing transmission of data to communication devices having the path loss equal to or greater than the threshold. The communication devices having the path loss less than the threshold transmit the data to the base station device using the first radio resource. Each of the communication devices having the path loss equal to or greater than the threshold transmit the data to the base station device using the second radio resource.

Abstract: A wireless communication apparatus obtains information on a communication performance when selecting a power saving mode. A wireless communication apparatus performing communication while selecting a power saving mode (power efficient) in which a power consumption is small or an operation mode (for example, normal mode: normal) other than the power saving mode, includes: a communication control part 32 that acquires power saving operation parameters in a case of operating in the power saving mode; and a power saving control part 33 that determines whether or not the acquired power saving operation parameters fulfill allowable parameters of its own apparatus in a case of operating in the power saving mode, selects any of operation modes in accordance with the determination result, and transmits information indicating the selected operation mode.

Abstract: A plurality of MTC devices can connect to a base station device efficiently. The base station device receives a request signal for requesting access to the base station device from MTC devices in group A that can transmit data to the base station device using a predetermined application data format. The base station device allocates radio resource to an MTC device operating as a gateway, among the MTC devices in group A. The MTC device operating as a gateway receives video data from an MTC device not operating as a gateway in group A. The base station device transmits the video data received from the MTC device not operating as a gateway to the base station device using the allocated radio resource.

Abstract: A base station device includes: an information collection unit configured to collect information for calculating evaluation values for each of first, second, and third transmission paths; an evaluation value calculation unit configured to calculate the evaluation values for each of the first, second, and third transmission paths, based on the collected information; and a transmission path selection unit configured to select, using the evaluation values of each of the first, second, and third transmission paths, a transmission path to be used by a mobile communication terminal.

Abstract: A wireless communication system is provided in which a plurality of MTC devices can connect to a base station device efficiently. Each of MTC devices in group A that transmits data to the base station device using a predetermined application format is allocated first radio resource common in group A. The MTC device transmits an access request signal to the base station device using the first radio resource. The base station device receives the request signal from the MTC device. The base station device allocates second radio resource common in group A to the MTC device. The MTC device transmits data to the base station device using the second radio resource.

Abstract: A mobile station device includes a peripheral regulated state acquirer configured to acquire regulated states of peripheral cells, a cell search processor configured to perform a cell search on peripheral cells selected based on the acquired regulated states, and a cell selector configured to select a handover destination cell based on a result of the cell search, thus making it possible to suppress a load on a base station of a process to avoid congestion.

Abstract: A communication system includes a wireless terminal device related to a predetermined service or group, a relay device, a base station device to be connected to the relay device, a gateway device, and a mobile management device. In the relay device included in the communication system, a registration processing unit transmits to the mobile management device, a first registration request signal that requests registration of the relay device, and receives first communication path information indicating a communication path between the relay device and the gateway device. A device determination unit receives from the wireless terminal device, a connection request signal that requests connection, and determines based on the connection request signal whether or not to transfer data related to the wireless terminal device. A data transfer unit transfers the data using the communication path indicated by the first communication path information.

Abstract: An operation requesting unit of a terminal device configured to, in a case that the terminal device is unable to be connected to a gateway device configured to connect a public wireless communication network and a short-range wireless communication network, transmit to the mobile management device, a gateway operation request signal that requests operation while regarding the terminal device as a gateway device.

Abstract: A first gateway apparatus includes: an apparatus determining unit configured to receive a connection request signal for requesting a connection from the second communication apparatus and identify at least one of the group and service based on the connection request signal; and a data transfer unit configured to transfer data received from the second communication apparatus to the second gateway apparatus.

Abstract: A base station device communicates with a mobile station device, either directly or via a relay station device. The base station device includes: a reference signal transmission instruction unit configured to instruct the mobile station device to transmit a reference signal; and a reference signal measurement instruction unit configured to instruct the relay station device to measure the reference signal that is transmitted by the mobile station device.

Abstract: A base station device includes: an information collection unit configured to collect information for calculating evaluation values for each of first, second, and third transmission paths; an evaluation value calculation unit configured to calculate the evaluation values for each of the first, second, and third transmission paths, based on the collected information; and a transmission path selection unit configured to select, using the evaluation values of each of the first, second, and third transmission paths, a transmission path to be used by a mobile communication terminal.

Abstract: A transmission channel selection method includes: collects information for calculating evaluation values of each of a plurality of transmission channels, and calculates separate evaluation values of the transmission channels individually with respect to each of a plurality of mobile stations; reduces the number of candidates for the transmission channels with respect to the plurality of mobile stations using the separate evaluation values; collects information for jointly calculating evaluation values of the transmission channels with respect to at least one of the plurality of mobile stations, and calculates the joint-separate evaluation values; and selects the communication paths of the plurality of mobile stations using the separate evaluation values and the joint-separate evaluation values.

Abstract: A base station device communicates with a mobile station device, either directly or via a relay station device. The base station device includes: a reference signal transmission instruction unit configured to instruct the mobile station device to transmit a reference signal; and a reference signal measurement instruction unit configured to instruct the relay station device to measure the reference signal that is transmitted by the mobile station device.

Abstract: A wireless communication system (1) includes a base station (200), one or a plurality of RNs (300) associated with the base station (200), and one or a plurality of mobile stations (100). When the mobile station (100) and the base station (200) communicate without going through the RN (300), the wireless communication system (1) uses a first transmission power control method to control the transmission power of the mobile station (100), and, when the mobile station (100) and the base station (200) communicate via the RN (300), the wireless communication system uses a second transmission power control method to control the transmission power of the mobile station.

Abstract: A wireless communication system includes a base station apparatus, a mobile station apparatus that performs wireless communication with the base station apparatus, and a relay station apparatus that relays wireless communication between the base station apparatus and the mobile station apparatus. The relay station apparatus switches between transmitting and not transmitting a synchronization signal or a reference signal to be transmitted to the mobile station apparatus.

Abstract: A wireless communication system, a base station device, a mobile station device, and a macrodiversity selection method of the invention, in a base station device including a macrodiversity function among a plurality of sectors, select a macrodiversity method for the mobile station device from a plurality of macrodiversity methods, in accordance with a predetermined determination reference based on reception conditions of the mobile station device.

Abstract: A transmitter which communicates with a receiver. The transmitter includes a null subcarrier allocation unit which allocates a null subcarrier based on a priority and a signal. The priority is for allocating a null subcarrier to each subcarrier. The priority is a ranking predetermined with the receiver. The signal is allocated to each subcarrier. The transmitter includes a transmission unit which transmits the signal using the subcarrier allocated by the null subcarrier allocation unit as the null subcarrier to the receiver.

Abstract: A cellular mobile communication system has a problem that communication quality is lowered by increase of an attenuation amount of a desired signal and increase of an interfering signal amount at a position apart from a base station and high-speed data communication becomes difficult. To solve this problem, when a mobile station M is at a location D where the radio attenuation is small, the mobile station M uses an OFDM signal to transmit data x, y and z via a traffic channel all at once so that data communication is performed at the maximum communication speed.

Abstract: To provide a mobile communication system, base station apparatus and mobile station device for use in a data communication service such as MBMS in which a plurality of base station apparatuses transmit identical information toward a plurality of mobile station devices, to enable data transmission of high reliability by making use of a MIMO signal processing technology in an OFDM scheme. A plurality of base station apparatuses 2 having received an identical information sequence from a server by way of a base station controller 1, map the information sequence to modulation symbols, divide the modulation symbols into blocks and each allot the blocks to frequency blocks different from those of other base station apparatuses 2 and transmit the signal to mobile station devices 10. Mobile station device 10 having received the signals demodulates them by a MIMO received signal processor 13 to produce output.