Abstract: 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.

Abstract: A radio controller of a mobile communications system performing broadcasting or multicasting that transmits the same information to multiple cells is disclosed. The radio controller includes a control information comparison part configured to compare the control information of a first one of the cells and the control information of a second one of the cells adjacent to the first one of the cells; and a control information creation part configured to create adjacent cell control information corresponding to the second one of the cells. The control information creation part determines part of the control information of the second one of the cells different from the control information of the first one of the cells as the adjacent cell control information.

Abstract: 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.

Abstract: The present invention effectively controls a reception of a multimedia content from a MBMS bearer service based on a priority level associated with each of the MBMS bearer service which transmits a plurality of the multimedia contents.

Abstract: The object of the present invention is to provide a communication system which makes it possible to avoid a control load from being generated while effectively utilizing the reception capabilities of mobile stations. The communication system includes a category manager 11 configured to categorize reception capability values showing reception capabilities necessary for receiving multicast data in the mobile stations, a reception capability collector 33 configured to collect the reception capability values of the mobile stations, a decider 34 configured to decide a hierarchical structure of the multicast data from a plurality of categories corresponding to the collected reception capability values of the mobile stations and a transmitter 31 configured to transmit the multicast data using the decided hierarchical structure.

Abstract: A mobile communication system having a radio controller for transmitting the same information to a mobile station via a plurality of radio links is disclosed. In the system, the mobile station includes an selecting unit for selecting at least one of receiving capability or receiving quality, and a transmitting unit for transmitting the selected information. The radio controller includes a receiving unit for receiving from the mobile station at least one of the receiving capability or reception quality, and a transmission timing controller for controlling transmission timing based on the received information from the mobile station.

Abstract: The object of the present invention is to provide a radio communication system which can reduce control information transmitted from mobile stations to a base station, reduce traffic of up link radio resources, and suppress the quantity of interference to the entire radio communication system. The present invention relates to the radio communication system in which the same information is transmitted from a base station 30a to a plurality of mobile stations 40a to 40c with a predetermined down link transmission power. The base station includes transmission power controller configured to control the predetermined down link transmission power based on control information transmitted by a part of the mobile stations 40a to 40c subordinated to the base station 30a.

Abstract: The object of the present invention is provide a mobile communication system which can reduce power consumption of a mobile station without increasing the number of times the data signals which are to be received by the mobile station are retransmitted. The base station 10 comprises a signal transmitter 11 configured to transmit the data signal a to the mobile station 30 within a predetermined period, and transmit each of retransmission signals a1 to a3 of the data signal a, in a form different from that of the data signal a, from the base station 10 to the mobile station 30 within the predetermined period A.

Abstract: The present invention provides a radio base station for preventing degradation of transmission quality characteristics even when there are time differences between the instant of channel estimation of uplink time slots UL#1 to UL#N and the instant of transmission of transmission data via downlink time slots DL#1 to DL#N. The radio base station includes transmit diversity controllers 141 to 14N for controlling transmit diversity to be used for downlink time slots DL#1 to DL#N and a data transmitter 15 for transmitting data via downlink time slots DL#1 to DL#N using the controlled transmit diversity.

Abstract: 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.

Abstract: A packet communications system which transmits a packet at a predetermined transmission rate includes a packet size controller configured to change a size of the packet in accordance with available space of a transmission buffer storing the packet, when the predetermined transmission rate is changed.

Abstract: 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.

Abstract: A transmission controller which controls downlink transmission rates of multiple communications terminals based on corresponding downlink transmission qualities of the communications terminals is disclosed. The controller includes a transmission-quality obtaining unit configured to obtain the downlink transmission qualities of the communications terminals. A communications-terminal selecting unit is configured to select out of the communications terminals one which has the need to change the downlink transmission rate in accordance with the downlink transmission qualities obtained at the transmission-quality obtaining unit. A transmission-rate changing unit changes the downlink transmission rate of the communications terminal selected at the communications-terminal selecting unit.

Abstract: A radio network controller 30 includes a selection decision unit 31 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 32 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 31.

Abstract: 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.

Abstract: An acquiring unit (60) of a reception device acquires, from a transmission device, a notification of re-establishment of data in a lower layer. A notifying/instructing unit (70) 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 (40) 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.

Abstract: In a mobile communication system for transmitting broadcast data and/or multicast data to a mobile station, a second network is configured to notify the mobile station of a service identifier of the second network for identifying the broadcast data and/or multicast data available in the second network, when the mobile station performs roaming from a first network to the second network; and the mobile station is configured to receive the broadcast data and/or multicast data from the second network, by using the service identifier of the second network.

Abstract: A mobile communication controlling apparatus for controlling inter-frequency handover includes a required quality identifying unit configured to identify a quality required for data addressed to a mobile station, a transmission rate control unit configured to control a data transmission rate of a higher layer based on the identification result supplied from the required quality identifying unit, and an inter-frequency handover instruction unit configured to temporarily suspend signal transmission from a radio base station connected to the mobile communication controlling apparatus and allow the mobile station to perform inter-frequency measurement.

Abstract: 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.

Abstract: A mobile communication controlling apparatus for controlling inter-frequency handover includes a required quality identifying unit configured to identify a quality required for data addressed to a mobile station, a transmission rate control unit configured to control a data transmission rate of a higher layer based on the identification result supplied from the required quality identifying unit, and an inter-frequency handover instruction unit configured to temporarily suspend signal transmission from a radio base station connected to the mobile communication controlling apparatus and allow the mobile station to perform inter-frequency measurement.