Fujitsu Corporation

Fujitsu Limied

Fujitsu Connected Technologies Limited

Yoshinori Tanaka

Yoshiaki Ohta

Yoshihiro Kawasaki

Katsumasa Sugiyama

Yoshiharu Tajima

Kazuhisa Obuchi

Kazuo Kawabata

Hideto Furukawa

Akira Ito

Yutaka Kobayashi

Naotoshi Watanabe

Ryuichi Takechi

Kazuaki Ando

Michiharu Nakamura

Hiroshi Fujita

Masatsugu Shimizu

Kazuo Nagatani

Yasuyuki Oishi

Manabu Kubota

Akihide Otonari

Yoshinori Soejima

Shinya Okamoto

Chiaki Shinohara

Miki Yamasaki

Hidenobu Fukumasa

Naoyuki Saito

Tetsuyoshi Takenaka

Atsuya Tanaka

Tetsuya Yano

Makoto Yoshida

Dai Kimura

Takaharu Nakamura

Tadashi Nakamura

Kenji Suda

Hiroaki Iwamoto

Jianming Wu

Kazuhisa Ohbuchi

Hiroaki Senoo

A radio terminal that performs radio communication with a base station, including: a communicator configured to perform radio measurement and monitoring of a paging signal; and a controller configured to control the communicator to receive information related to first duration by Non-Access Stratum (NAS) message from the base station, and not to perform the radio measurement and the monitoring during the first duration but to perform the radio measurement and the monitoring during second duration different from the first duration, wherein the controller is further configured to control the radio measurement and the monitoring by ending the first duration for transmitting uplink data of the radio terminal.

Radio terminal, radio communication system, and radio communication method

A communication unit of a radio terminal performs radio measurement of a base station and monitoring of a paging signal within a periodic duration. A controller controls the communication unit so as to perform filtering of the radio measurement within the duration with intervals less than half of the duration.

Provided is a wireless communication system in which high-speed communication is implemented. A receiving device includes an RA managing unit that transmits Msg1 through a PRACH over an SCELL and a D-SR managing unit that transmits a D-SR through a PUCCH over a PCELL before or after the PRACH. A transmitting device includes an RA managing unit that receives Msg1 and a D-SR managing unit that receives the D-SR. The RA managing unit associates a scheduling request with a preamble, and identifies a receiving device.

Wireless communication system, receiving device, transmitting device, and wireless communication method

A wireless communication system includes a mobile station and a base station. The base station includes a blind decoding control unit that transmits a signal including a control signal serving as a trigger to change a decoding process to the mobile station based on a result of measurement of the amount of data of the mobile station. The mobile station includes a blind decoding control unit that selects a signal format to be decoded upon reception of the control signal from the base station, and detects a control signal directed to the mobile station by decoding the signal having the selected format among signals received from the base station.

Wireless communication system, mobile station, base station, and wireless communication system control method for reducing power consumption

A communication duration configuring method is used in a mobile communication system including a mobile relay station for relaying a wireless communication between a base station and a mobile station. The method includes: configuring at least any of a downlink communication duration where the relay station receives a transmission signal from the base station by restricting a transmission of a signal from the relay station to the mobile station and an uplink communication duration where the relay station transmits a transmission signal to the base station by restricting a transmission of a signal from the mobile station to the relay station; and restricting a transmission of a signal with the mobile station in a first period from detection of a handover until when the communication duration is configured between the relay station and a target base station, and using a desired duration within the first period.

Communication duration configuring method, relay station, and mobile communication system

A radio communication system, that includes a source base station; a target base station; and a mobile station for receiving either first sequence number or second sequence number, or both of the first and second sequence numbers from the target base station, whereby the first sequence number is transferred from the source base station to the target base station and the second sequence number is added to PDCP (Packet Data Convergence Protocol) SDU (Service Data Unit) which is transferred from the source base station to the target base station.

Base station, mobile station, communication system, transmission method and reordering method

A communication control device, includes a terminal information acquisition unit which acquires terminal-related information including communication service information relating to a communication service executed, and network information relating to a network, a selection unit which selects, among a plurality of combinations of networks each of which can be used by each of a plurality of communication services, a combination of networks having a smallest total communication cost to be charged for each of the plurality of communication services in each of the plurality combinations of networks, on the basis of the terminal-related information, and network-related information including communication cost information, and communication bandwidth information, and a network control unit which executes a network control such that the networks used respectively by each of the plurality of communication services are the selected combination of networks.

Communication control device, communication control system and communication control method

A wireless communication system includes a sending device and a receiving device. The sending device includes a first control unit that sends the state of a buffer by using a first wireless carrier, and a first random access management unit that manages random access performed by the sending device. The receiving device includes a second control unit that receives the state of the buffer by using the first wireless carrier and that performs a data exchange by using a second wireless carrier on the basis of the state of the buffer, and a second random access management unit that manages random access performed by the receiving device. The second random access management unit sends control information that includes a dedicated preamble that is unique to a device. The first and the second random access management units perform non-contention based random access that uses the dedicated preamble.

Wireless communication system and method of wireless communication

A communication apparatus includes a memory and a processor coupled to the memory and configured to transmit a first content acquisition request to a first server apparatus via a first base station apparatus, receive a content, requested by the first content acquisition request, from the first server apparatus via the first base station apparatus, and change, in a case where coupling is switched from the first base station apparatus to a second base station apparatus in a handover process, a transmission destination address in a second content acquisition request to be transmitted to the second base station apparatus, from a first address of the first server apparatus coupled to the first base station apparatus to a second address of a second server apparatus coupled to the second base station apparatus.

Communication apparatus, storage apparatus, and control method

A communication duration configuring method is used in a mobile communication system with a relay station for relaying wireless communications between a base station and a mobile station. The method includes: configuring at least one of a downlink communication duration in which the relay station receives a transmission signal from the base station while limiting a transmission of a signal from the relay station to the mobile station, and an uplink communication duration in which the relay station transmits the transmission signal to the base station while limiting a transmission of a signal from the mobile station to the relay station; measuring a self-interference amount in the relay station; and controlling a configuration of the communication duration according to the self-interference amount.

Communication duration configuring method, relay station, base station, and mobile communication system

A base station includes plural communication units that each includes a first processing unit that executes physical layer and data link layer processes of radio communication between the base station and a mobile station, and a second processing unit that executes network layer processes of the radio communication; and a third processing unit that is of a network layer and controls a series of radio communication sessions between the base station and the mobile station, based on carrier aggregation using the first processing unit of each of the communication units.

Base station, communication system, and communication method

A mobile station includes a notifying unit configured to transmit a notification signal to a base station forming a serving cell, when a certain condition used to determine whether or not to perform a handover is satisfied, and a handover processing unit configured to start a handover process according to presence or absence of first communication data after transmission of the notification signal.

Mobile station, base station, and communication method

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 mobile station that performs wireless communication by using a plurality of wireless carriers, the mobile station includes a transmission managing unit that detects a transmission timing of communication data of a predetermined wireless carrier, and a state managing unit that makes the predetermined wireless carrier an activated state when the transmission managing unit detects the transmission timing of the communication data, and makes the predetermined wireless carrier a deactivated state after the communication data is transmitted and received.

Growing community of inventors

Kawasaki, Japan

Yoshiharu Tajima