Fujitsu Corporation

Fujitsu Connected Technologies Limited

Kotaro Shiizaki

Yoshihiro Kawasaki

Yoshinori Tanaka

Hiroyuki Seki

Daisuke Jitsukawa

Kazuo Kawabata

Kenji Suda

Akira Ito

Takao Nakagawa

Nobukazu Fudaba

Masafumi Tsutsui

Hitoshi Yokoyama

Naoyuki Saito

Junji Otonari

Ryusuke Kiryu

A wireless base station, includes: a wireless transceiver configured to transmit to a wireless terminal a downlink frame including a downlink control information, the wireless downlink control information includes information representing a specified offset, wherein the wireless transceiver is further configured to receive an uplink frame from the wireless terminal; and a processor circuit coupled to the wireless transceiver and configured to determine uplink control information from the uplink frame, the uplink control information being offset by at least the specified offset from a location in the uplink frame that is the same as a location where the downlink control information was located in the downlink frame.

Wireless communication system, wireless base station, wireless terminal, and wireless communication method

A base station apparatus includes a processor. The processor executes a process including obtaining information indicating a radio status of each mobile station apparatus relevant to first communication in which radio communication is performed between the mobile station apparatuses via the base station apparatus, and second communication in which radio communication is directly performed between the mobile station apparatuses without via the base station apparatus; and notifying, based on the obtained information, the mobile station apparatuses that perform the second communication of control information for controlling the second communication.

Base station apparatus, mobile station apparatus, radio communication system, communication control method of base station apparatus, and communication control method of mobile station apparatus

A base station device includes: an acquisition unit that acquires reception quality of each of a plurality of carriers from a terminal device that performs primary cell connection for transmission and reception of a control channel signal using a carrier whose reception quality is most preferable; a decision unit that decides an amount of increase in transmission power of one of the carriers based on the reception quality acquired by the acquisition unit; a determination unit that estimates whether switching of the primary cell connection occurs in case of increasing the transmission power by the amount of increase and determines whether to increase the transmission power according to the estimation result; and an instruction unit that instructs a transmission unit to increase the transmission power of the carrier by the amount of increase when the determination unit determines to increase the transmission power.

Wireless communication system, base station device and transmission power control method

A base station sends, to a mobile station, first resource allocation information in accordance with a scheduling request from the mobile station. Furthermore, the base station sends, to the mobile station, second resource allocation information based on the buffer status that is reported from the mobile station by using the first resource allocation information. The base station includes a receiving unit and a processor. The receiving unit receives data sent from the mobile station by using the second resource allocation information. When the processor receives a scheduling request from the mobile station before the completion of the reception of data by an amount indicated by the buffer status reported from the mobile station and when a predetermined condition is satisfied, the processor performs control such that the processor sends the second resource allocation information to the mobile station without sending the first resource allocation information.

Wireless communication system, base station, mobile station, and wireless communication method

A wireless communication system including a transmitting and receiving device that performs communications with the transmitting device, using a radio frame containing control information and data, wherein the transmitting device includes: a first generating unit that generates first control information able to be estimated by the receiving device; a second generating unit that generates second control information used for control of communication from the receiving device to the transmitting device and unable to be estimated by the receiving device; a multiplexing unit that multiplexes the control and data information so that the first control information is allocated in the control information and the second control information is allocated in the data in the radio frame; a transmitting unit a signal multiplexed by the multiplexing unit; the receiving device includes a receiving unit that receives the signal wherein the second control information is allocated in the data from the transmitting device.

Wireless communication system and wireless communication method

A wireless relay device relays data from a transmitting device to a receiving device by wireless communication. The wireless relay device includes a buffer and a buffer control unit. The buffer temporarily stores relay target data. The buffer control unit controls the buffer, based on comparison of priority of first data received from the transmitting device with priority of second data stored in the buffer, (i) to remove the second data from the buffer and to store the first data in the buffer or (ii) not to store the first data in the buffer.

Wireless relay device and wireless relay method

A wireless communication system in which retransmission is performed between a transmitting apparatus and a receiving apparatus, whereby the transmitting apparatus includes, a first transmitting unit to transmit first data to the receiving apparatus and retransmission controlling unit to perform transmission of second data, the data part of which is same as that of the first data, without waiting for a feedback signal from receiving apparatus regarding the first data, and to wait for a feedback signal from the receiving apparatus regarding the second data, and the receiving apparatus includes, a second transmitting unit to transmit the feedback signal regarding the second data to the transmitting apparatus.

Wireless communication system and retransmission method

A communication apparatus for communicating via a frame containing a plurality of first type blocks into which pilot information is inserted and a plurality of second type blocks into which control information or data is inserted, the communication apparatus including a channel estimation accuracy predicting unit for predicting channel estimation accuracy of each of the plurality of second type blocks based on channel estimate values of the plurality of first type blocks in the frame. The communication apparatus includes an allocation determining unit for determining an allocation based on priority information containing a priority of each type of the control information and data such that control information or data of a higher-priority type is inserted into a block among the plurality of second type blocks with higher channel estimation accuracy.

Communication apparatus and allocation determining method

A base transceiver station performing communications with user equipment, includes a receiving unit to receive an uplink transmission signal containing a propagation path fluctuation value between a self-device and the user equipment from the user equipment; and a communication permitting unit to control a period of time during which a permission of communications is given to the user equipment based on the propagation path fluctuation value.

Base transceiver station

A wireless relay device that transmits a reception signal from a transmission device to a reception device includes a determination section configured to determine whether or not the reception signal is a retransmission signal retransmitted from the transmission device, and an amplification section configured to amplify the reception signal when the determination section determines that the reception signal is the retransmission signal, and not to amplify the reception signal when the determination section determines that the reception signal is not the retransmission signal.

Wireless relay device, wireless relay method, and wireless communication system

The present invention relates to a wireless communication device performing communications by using a radio frame containing a control channel and a data channel, the wireless communication device comprises of a structuring unit that allocates a first part of the control channel adjacent to the data channel in the radio frame, and allocates a second part of the control channel, which denotes different control information from the first part, to the data channel so as to be inserted between data of the data channel and a transmission unit that transmits the radio frame including the data channel and the control channel.

Wireless communication device and wireless communication method

A relay device for relaying wireless communication between a transmission device and a reception device includes a buffer configured to temporarily store first data that is a relay object so that the first data is retransmitted to the reception device, a buffer control unit configured to restrict the first data from being stored in the buffer when, based on information acquired using a signal fed back from the reception device, it is determined that a chance of retransmitting the first data is low, and a retransmission request unit configured to request the transmission device to retransmit the first data when the first data is not stored in the buffer and the first data is to be retransmitted to the reception device.

Relay device and wireless relay method

According to priorities determined on the basis of a number of pieces of battery information which concern batteries of a number of communication terminals and each of which is received from the communication terminals, data communication with communication terminals are controlled. The priorities are varied, irrespective of a variation in the pieces of battery information, according to a rule predetermined.

Base station, communication terminal, method for communication at base station, method for communication at communication terminal, and communication system

In a base station apparatus, signal processing units are connected to a corresponding antenna unit and another antenna unit, a part of resources for processing a signal received by the antenna unit corresponding to each signal processing unit is allocated to processing of a signal received by the other antenna unit, and the signals received by the corresponding antenna unit and the other antenna unit are subjected to multi-antenna reception processing using the resources.

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Kawasaki, Japan

Kotaro Shiizaki