Fujitsu Corporation

Fujitsu Semiconductor Limited

Michiharu Nakamura

Hajime Hamada

Yasuyuki Oishi

Yoshinori Tanaka

Yoshihiro Kawasaki

Yoshiaki Ohta

Takayoshi Ode

Yoshiharu Tajima

Yassin Aden Awad

Kazuo Nagatani

Kazuaki Ando

Tetsuya Yano

Chenxi Zhu

Yuuta Nakaya

Hongyang Chen

Xin Wang

Hiroyuki Hayashi

Dorin Gheorghe Viorel

Yoshihiko Asano

Liang Zhou

Syuusaku Suzuki

Hiroyuki Seki

Masahiro Watanabe

Makoto Yoshida

Shinichiro Aikawa

Daisuke Jitsukawa

Masato Okuda

Hiroshi Fujita

Michael John Beems Hart

Nobuhisa Aoki

Yuefeng Zhou

Koji Matsuyama

Jianmin Zhou

Atsushi Honda

Naoyuki Saito

Wladimir Bocquet

A base station device that communicates with a terminal device in a wireless manner, the base station device includes, a controller configured to determine an accumulation number which is a number of reception confirmation packets that are able to be accumulated in the terminal device and correspond to packets received from the base station device, in accordance with an amount of data transmitted by the terminal device, and a transmitter configured to transmit a control signal including the determined accumulation number to the terminal device.

Base station device, terminal device, and communication method

A communication device includes, a controller that executes control to receive a data transmission packet from another communication device, create a reception confirmation packet indicating reception of the data transmission packet, and store the created reception confirmation packet in a transmission buffer, and a transmitter that transmits a part of reception confirmation packets stored in the transmission buffer to the other communication device but does not transmit reception confirmation packets other than the transmitted reception confirmation packet to the other communication device.

Communication device, relay device, and communication system for controlling generation of a TCP acknowledgement (ACK)

A communication device includes a receiver , a transmitter that executes first transmission processing and second transmission processing , and a controller that controls the transmitter in accordance with a radio quality of wireless communication so that either the first transmission processing or the second transmission processing is executed.

Communication device, communication method, and communication system

A wireless communications system includes a base station; and a terminal; wherein the base station includes a transmitter configured to transmit to the terminal using a physical downlink control channel, information used for assignment of first candidate and second candidate of a utilization resource in an unlicensed band for transmitting a wireless signal; and a receiver configured to receive the wireless signal from the terminal; and the terminal includes a receiver configured to receive the information; and a transmitter configured to transmit the wireless signal to the base station using the first candidate when the first candidate is idle, or using the second candidate when the first candidate is not idle and the second candidate is idle; and wherein the assignment of the first candidate and the second candidate by the base station is performed by allocating a plurality of subframes.

Wireless communications system, communications apparatus, and processing method

A base station device includes: a memory; and a processor coupled to the memory and configured to execute a first generation processing that includes generating a first control channel to be placed in a sub-frame at a predetermined cycle, the first control channel including designation information indicating at least one sub-frame in the predetermined cycle, execute a second generation processing that includes generating a second control channel to be placed in a sub-frame indicated by the designation information in the first control channel, the second control channel including control information for controlling communication, and execute a transmission processing that includes transmitting a sub-frame in which the first control channel is placed and a sub-frame in which the second control channel is placed.

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

A radio base station includes: a radio communicator configured to perform radio communication; and a first controller that includes a first scheduler configured to perform a first scheduling that is at least a first part of a scheduling for the radio communication; and a second controller that is coupled to the first controller via a network, wherein the second controller comprises a second scheduler configured to perform a second scheduling that is at least a second part of the scheduling for the radio communication.

Radio base station, central apparatus, and distributed apparatus

A wireless communications system includes a first communications apparatus configured to use a predetermined band shared with a second wireless communications system and receive a wireless signal from a second communications apparatus; and the second communications apparatus. The first communications apparatus is further configured to assign to the second communications apparatus, a first candidate and a second candidate for a utilization resource in the predetermined band. The second communications apparatus is configured to perform radio resource idle state detection based on a result of assignment of the first candidate and the second candidate. The second communications apparatus is further configured to use the first candidate and transmit the wireless signal to the first communications apparatus when the first candidate is idle, and to use the second candidate and transmit the wireless signal to the first communications apparatus, when the first candidate is not idle and the second candidate is idle.

A wireless device is used in a wireless communication system that includes a base station for controlling communication in which a time division duplex frame including at least one uplink subframe and at least one downlink subframe is transmitted. The wireless device includes: a request transmitter that transmits a request for performing D2D (device-to-device) communication to the base station; a receiver that receives position information to indicate a position at which a blank subframe is allocated in the time division duplex frame from the base station; and a scheduler that determines a schedule for D2D communication based on the position information and reports the schedule to a corresponding wireless device. The blank subframe is configured to include a symbol for control signal and a plurality of blank symbols in which no signal is transmitted from the base station.

Base station and wireless device used in wireless communication system

A wireless communication system includes a base station apparatus and a terminal device. The base station apparatus includes a processor that executes a process including mapping first control information concerning a first frequency band which needs a license to use for wireless communication, mapping second control information concerning a second frequency band which does not need the license to use for the wireless communication, and generating a control channel signal by arranging the first control information and the second control information in areas different from each other; and a transmitter that transmits the control channel signal generated by the processor to the terminal device.

Wireless communication system, base station apparatus, terminal device, and transmission method

A communication terminal device includes a determining unit that determines a region size of a control channel in accordance with a PHICH duration value transmitted from a base station device, and an acquiring unit that acquires, on the basis of the region size, data to be sent to the communication terminal device. A base station device includes a first control unit that updates a CFI value at a first interval, a second control unit that updates a PHICH duration value at a second interval, the second interval being greater than the first interval, and a scheduling unit that performs scheduling of, only in a subframe in which the PHICH duration value matches the CFI value, data to be sent to a communication terminal device that is outside an arrival coverage of a signal including the CFI value.

Communication terminal device, base station device, and communication system

A communication system includes: a base station configured to perform radio communication with a mobile station; and a control device configured to control a rate of transferring data to the base station based on a radio quality between the mobile station and the base station. A control device includes: a memory; and a processor coupled to the memory and configured to: obtain a radio quality between a mobile station and a base station that performs radio communication with the mobile station; and control a rate of transferring data to the base station based on the radio quality.

Communication system, mobile station, and control device

A method for transmission of information about downlink and uplink parameters of a intermediate apparatus link in a multi-hop wireless communication system, the system comprising a first node apparatus, a second node apparatus and one or more intermediate apparatuses, each said apparatus being operable to transmit and receive information along a series of links forming a communication path for downlink and uplink communication, the communication path extending between the first node and second node apparatuses via the or each intermediate apparatus, each link comprising either a first node link between the first node apparatus and a said intermediate apparatus or an intermediate apparatus link between a said intermediate apparatus and a said apparatus which is not the first node apparatus, and the system having access to a minimum allocation unit for allocating time and transmission frequency bandwidth, the method comprising: obtaining values of downlink and uplink parameters for a particular intermediate apparatus link; mapping both values onto a single minimum allocation unit and transmitting them towards the first node apparatus.

System and method for downlink and uplink parameter information transmission in a multi-hop wireless communication system

A communication control device includes a traffic monitoring unit, the number of ranks calculation unit, a rank value calculation unit, a communication control unit, and a download unit. The traffic monitoring unit monitors a traffic amount between a content server and a base station. The number of ranks calculation unit calculates the number of rank values that servers as a reference for determining a download destination mobile station of data based on a monitoring result by the traffic monitoring unit. The rank value calculation unit calculates the rank value for each mobile station using the number and radio communication quality of a plurality of mobile stations. The communication control unit determines the download destination mobile station in order from a mobile station having a high rank value at a determination timing. The download unit downloads the data to the mobile station determined as the download destination.

Communication control device, mobile station, and communication control method

A communication control apparatus includes a communication quality determining unit, a rank value calculating unit, and a download control unit. The communication quality determining unit acquires wireless communication qualities of a plurality of mobile stations. The rank value calculating unit calculates a reference value to determine mobile stations to be data download destinations by using the wireless communication qualities acquired by the acquiring unit, compares the reference values of the respective mobile stations at a first time point, and determines mobile stations to be the data download destinations in order from a mobile station whose reference value is the highest based on results of the comparison. The download control unit downloads data to the mobile stations determined as the data download destinations by the rank value calculating unit.

Communication control apparatus, mobile station, and communication control method

In a radio communication system in which a radio communication apparatus performs communication with another apparatus via a radio relay apparatus, a communication quality value indicating communication quality between the radio communication apparatus and the radio relay apparatus is measured, a threshold for deciding a level of the communication quality is determined on the basis of a past tendency of the communication quality value, and transmission of contents between the radio communication apparatus and the other apparatus is blocked while a present value of the communication quality is smaller than the threshold.

Growing community of inventors

Yokosuka, Japan

Michiharu Nakamura