Abstract: A reference signal specific to each base station device and a reference signal specific to each mobile station device are not mixed within one OFDM symbol of a resource block, and OFDM symbols including the reference signal specific to each mobile station device are arranged at regular intervals on a time axis. By using such a signal arrangement pattern, it is possible to overcome the problems in Non-Patent Document 1 mentioned above caused by mixing a reference signal specific to each base station device and a reference signal specific to each mobile station device in one OFDM symbol. Thus, it becomes possible to prevent the reference signal specific to each base station device and the reference signal specific to each mobile station device from being mixed within one OFDM symbol of a resource block.

Abstract: The present invention is to enable reduction of constraint brought by generation of ID codes of reference signals to be used for cooperative reception and the allocation of the reference signals when radio communication is carried out between a plurality of base station apparatuses and a terminal unit. Terminal units UE201 to UE205 are terminal units existing in the cellular zone of a base station apparatus BS200 and are performing communication with base station apparatus UE200. When terminal unit UE201 is located at the edge of cell and its reception characteristic degrades, another base station apparatus, specifically, base station apparatus BS100 also performs cooperative transmission while terminal unit UE201 performs cooperative reception.

Abstract: A base station device, a terminal device to communicate with a base station device, and a transmission method are disclosed. The base station device includes an indicating part that indicates the availability of the coordinated communication. The base station device also includes a determining part that determines, in accordance with the availability of the coordinated communication, the ratio of the power of a data signal with respect to a transmission symbol including a reference signal to the power of a data signal with respect to a transmission symbol not including a reference signal.

Abstract: A mobile communication system comprised of one or a plurality of base station apparatuses and a mobile station apparatus; characterized in that the one or plurality of base station apparatuses positions one or a plurality of logical antenna port reference signals, which are inside one or a plurality of logical antenna ports respectively, to different sub-frames; and the mobile station apparatus uses the logical antenna port reference signals of the one or plurality of logical antenna ports to perform channel status measurement.

Abstract: A wireless communication system of the present invention includes a plurality of cells in each of which a base station apparatus (BS) is provided, the base station apparatuses (BS) being connected to one another via a network, each of the base station apparatuses (BS), including: an interference quantity information storage section (29) for storing at least information on interference quantities of a signal transmitted, to a terminal apparatus in a corresponding one of the cells in which the each of the base station apparatuses is provided, from another cell different from the corresponding one of the cells; a transmission section (22) for notifying the information stored in the interference quantity information storage section (29) to the network; and a transmission method determination section (25) for determining, on the basis of the information on the interference quantities, transmission methods by which a signal is transmitted to the terminal apparatus.

Abstract: A base station apparatus having eight antennas and configured to communicate with a mobile station apparatus includes: a power adjustment unit which has a function of adjusting the power of a base station apparatus specific reference signal, the power of a mobile station apparatus specific reference signal, the power of a control signal and the power of a data signal on the basis of power adjustment values shown in FIG. 5 including information on the power of the base station apparatus specific reference signal, the power of the mobile station apparatus specific reference signal, the power of the control signal and the power of the data signal; and a transmission unit which has a function of informing the mobile station apparatus of the power of the data signal. With this configuration, the base station apparatus having eight antennas can inform the mobile station apparatus of the power of the data signal.

Abstract: The present invention is to enable reduction of constraint brought by generation of ID codes of reference signals to be used for cooperative reception and the allocation of the reference signals when radio communication is carried out between a plurality of base station apparatuses and a terminal unit. Terminal units UE201 to UE205 are terminal units existing in the cellular zone of a base station apparatus BS200 and are performing communication with base station apparatus UE200. When terminal unit UE201 is located at the edge of cell and its reception characteristic degrades, another base station apparatus, specifically, base station apparatus BS100 also performs cooperative transmission while terminal unit UE201 performs cooperative reception.

Abstract: A reference signal specific to each base station device and a reference signal specific to each mobile station device are not mixed within one OFDM symbol of a resource block, and OFDM symbols including the reference signal specific to each mobile station device are arranged at regular intervals on a time axis. By using such a signal arrangement pattern, it is possible to overcome the problems in Non-Patent Document 1 mentioned above caused by mixing a reference signal specific to each base station device and a reference signal specific to each mobile station device in one OFDM symbol. Thus, it becomes possible to prevent the reference signal specific to each base station device and the reference signal specific to each mobile station device from being mixed within one OFDM symbol of a resource block.