Ntt Docomo, Inc.

Nippon Telegraph and Telephone Corporation

Takuto Arai

Anil Umesh

Akihito Hanaki

Yuta Sagae

Yoshiaki Ofuji

Masahiro Fujii

Kunihiko Teshima

Daisei Uchida

Tatsuro Yajima

Shuki Wai

Hidekazu Shimodaira

Tatsuhiko Iwakuni

Daisuke Hiratsuka

Takashi Kosugi

A communication device constitutes a management node that manages at least one of a first base station and a second base station provided on fronthaul. The communication device includes an acquisition unit that acquires a delay profile of the second base station, a control unit that determines a window parameter used to specify at least one of a Reception window and a Transmission window used in the first base station based on the delay profile of the second base station and a delay parameter defined by the fronthaul, and a notification unit that notifies the first base station of the window parameter.

Management node, distributed unit, radio communication system, and radio communication method

A wireless communication apparatus includes a terminal selection unit that selects one or more user terminals, a prediction unit that derives a prediction value of an interference amount of a stream group transmitted from a plurality of antennas for the selected one or more user terminals, a collection unit that, when the prediction value of the interference amount is less than a threshold value, collects reception power values of streams included in the stream group from the selected one or more user terminals, an antenna selection unit that selects the plurality of streams in descending order of reception power values and selecting the plurality of antennas associated with the plurality of selected streams, and a transmission unit that transmits the plurality of selected streams by beam forming using the plurality of selected antennas.

Wireless communication apparatus and wireless communication method

A FrontHaul Multiplexer (FHM) for relaying communications between a signal processing device and a plurality of radio devices includes a storage unit that stores a table in which device identification information of each of the plurality of radio devices is associated with beam identification information assigned to the radio device; a scheduling information reception unit that receives, from the signal processing device, scheduling information of a user terminal performing radio communications with the plurality of radio devices; a determination unit that acquires from the table the device identification information associated with the beam identification information of uplink included in the scheduling information and then determines from the acquired device identification information the radio device in charge of the user terminal; and a transmission unit that transmits to the signal processing device an uplink signal transmitted from the determined radio device.

Signal processing device, radio device, front haul multiplexer, beam control method, and signal combining method

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Tokyo, Japan

Takuto Arai