Fujitsu Corporation

Nissan Motor Company Limited

Tetsuo Tomita

Tomonori Kumagai

Kazunari Kobayashi

Bun Kimura

Satoshi Watanabe

Daisuke Nitta

Masanori Hashimoto

Eiji Ikeda

Akira Fujishima

Teruyoshi Watanabe

Masato Katori

Toshiharu Kawanishi

Toshiyuki Yokosaka

Takashi Sonobe

Kenji Arai

Hiroaki Takashima

Yuki Shinada

Tatsuru Nakagaki

Noboru Hasegawa

Kayo Motohashi

Mitsuhiro Tani

Koichi Hiramoto

Takeshi Masubuchi

Daisuke Inagaki

Masanori Hasimoto

A relay device configured to be coupled to a control device, the control device storing first information indicating a position and second information indicating a characteristic of a wireless device which is to be coupled to the control device, the relay device includes a memory, and a processor coupled to the memory and configured to receive, from the wireless device, device information including performance of the wireless device and installment information including a position where the wireless device is located, transmit to the control device the device information and the installment information, receive a response from the control device when the position where the wireless device is located satisfies the first information and the performance of the wireless device satisfies the second information, and establish a communication link between the wireless device and the control device, after receiving the response from the control device.

Relay device, communication system and communication method

A base station apparatus, includes: a processor; and a memory that stores a communication controlling program to be executed by the processor, wherein the processor is operable, based on the communication controlling program, to: receive a first call connection request transmitted from a terminal apparatus; compare a pattern including values of a plurality of parameters extracted from the first call connection request with a characteristic pattern of a second call connection request based on application communication; and perform, when the pattern of the first call connection request and the characteristic pattern coincide with each other, a transmission process to a different apparatus in accordance with the first call connection request after a delay time elapses from a reception timing of the first call connection request.

Base station apparatus, communication controlling method and communication system

A REC unit manages card information on each of L1 cards handling a physical channel, L2-1 cards handling a logical channel, and L2-2 cards in which a scheduling function for communication processing performed with respect to the L1 card and/or the L2-1 card is implemented. A call control card of the REC unit selects, for each of first to third channels, a processing card establishing a signal path relevant to the logical channel from among the L1 card, the L2-1 card, and the L2-2 card. The call control card transmits connection relation information indicating a combination of the processing cards selected to each processing card. On the basis of the connection relation information received from the call control card, each processing card establishes the signal path for each of the first to third channels relevant to the logical channel between the processing cards.

Base station apparatus

An apparatus acquires a parameter set including first and second parameter subsets. The first parameter subset stores first throughput and first power consumption that are measured, before a handover of a mobile station, by each base-station belonging to a measurement target group including a plurality of handover-candidate base-stations and a handover-source base-station. The second parameter subset stores second throughput and second power consumption that are estimated by each base-station belonging to the measurement target group, on the assumption that the mobile station is handed over to the each base-station. The apparatus calculates, before and after the handover, for each of the plurality of handover-candidate base-stations, a total energy efficiency of a pair of the handover-source base-station and the each of the plurality of handover-candidate base-stations, based on the parameter set, and selects, from among the plurality of handover-candidate base-stations, the handover-destination base-station based on the calculated total energy efficiencies.

Apparatus and method for controlling selection of a handover destination

A wireless communication system includes a first relay station that includes a first storage and performs wireless communication with a first base station coupled to an exchange by a wire, and a mobile device that performs wireless communication with the first relay station. The first relay station receives first data with a first sequence number from the first base station, and stores the first data with a second sequence number into the first storage, the first relay station selects a first node as a handover destination, and when the first node is a second base station coupled to the exchange by a wire, the first relay station receives second data with a third sequence number from the first base station, and transmits the first data with the second sequence number and the second data with a fourth sequence number continuous to the second sequence number to the second base station.

Wireless communication system

A control method for controlling base station apparatuses used in a communication system comprising a first base station apparatus, a second base station apparatus, and one or more mobile station apparatuses, including determining whether or not a first condition relating to the number of the mobile station apparatuses positioned in the overlapping area of the cover area of the first base station apparatus and the cover area of the second base station apparatus and to respective output power of the mobile station is satisfied, and outputting a radio signal from the second base station apparatus if the first condition is satisfied.

Method of controlling base station apparatus and base station apparatus controlled by same

A base station, to which a cell belongs and which communicates with a relay node to which a relay node cell belongs, including a control unit configured, at a time of handing over the relay node from another cell belonging to a first base station to the cell belonging to the base station, to request the relay node to measure wireless quality of neighbor cells of the cell belonging to the base station and report a measurement result of the wireless quality, and to update by adding or deleting, if the measurement result of the wireless quality of a first neighbor cell among the neighbor cells is higher or lower than a predetermined threshold for the cell existing at the handover destination of the relay node, the relay node cell to or from a first neighbor cell list of the first neighbor cell, respectively.

Base station, communication method and wireless communication system

A base station, to which a cell belongs and which communicates with a relay node to which a relay node cell belongs, includes a control unit configured, at a time of handing over the relay node from the cell of the base station to a first cell belonging to a first base station, to extract information indicative of a non-overlapping cell between a first handover destination neighbor cell list containing neighbor cell information of a first neighbor cell adjacent to the first cell at a handover destination and a first handover source neighbor cell list containing neighbor cell information of a neighbor cell adjacent to the cell at a handover source, and to update a neighbor cell list corresponding to the non-overlapping cell by deleting the relay node cell belonging to the relay node from the neighbor cell list based on the information indicative of the non-overlapping cell.

A base station device including: a receiver that receives data from a terminal device; and a processor that performs setting for the reception of data from the terminal device, and deactivates a management of the terminal device after performing setting, wherein the receiver receives data from the terminal device in a state of deactivated management.

Base station device, terminal device and communication system

A frequency band adjusting method, in a first communication system and a second communication system sharing usable frequency band with each other, for adjusting the frequency band used by a first communication apparatus in the first communication system, comprising: determining whether or not increase in the frequency band used by the first communication apparatus is necessary based on the frequency band used by the first communication apparatus and the number of access to the first communication apparatus; determining whether or not increase in the frequency band used by the first communication apparatus is to be approved, according as there is or there is not unused frequency band not used by a second communication apparatus in the second communication system having coverage overlapping with the first communication apparatus; and, if increase is approved, increasing the frequency band used by the first communication apparatus.

Frequency band adjusting method, communication apparatus and frequency band adjusting apparatus

In a communication system, a management device, which is under the control of the MVNO, collects radio quality information from a UEby using a communication channel established between the management deviceand the UE, selects an optimum cell by using the collected radio quality information, and notifies the UEof the selected optimum cell. The UEthen connects or hands over to the optimum cell notified by the management device

Communication method, management device, and mobile device

A communication apparatus comprises a processing information acquiring unit to acquire a processing delay time, a transmission information acquiring unit to acquire each transmission delay time, a collecting unit to collect each arrival time from nodes onward from each of the subordinated nodes, a calculating unit to calculate the time after distribution data is received by the self-node until it arrives at each of the terminals as the arrival time from the home node onward for each of the nodes through which the distribution data is routed based on the processing delay time, the transmission delay times, and each the arrival time from the node onward, and a transmission control unit to control the transmission timing of the distribution data to at least one of the nodes based on the arrival times from the home node onward for each of the nodes.

Communication apparatus, base station apparatus and data reception timing synchronizing method

A base station device for making communications with a mobile terminal includes a communication monitoring unit that monitors a communication situation between the base station device and the mobile terminal; and an operational-power control unit that causes, when the communication monitoring unit detects that no communications between the base station device and the mobile terminal have been made for a predetermined continuous period or longer, the base station device to operate at a power lower than a predetermined power.

Base station device, mobile communication method, and mobile communication system

A mobile communication system includes a data multiplexer which divides by time a radio frame of a communication channel in a radio layer and multiplexes one of a plurality of pieces of multicast data and a plurality of pieces of broadcast data into the divided radio frames; and a data multiplex demultiplexer which demultiplexes, when receiving one of the plurality of pieces of multicast data and the plurality of pieces of broadcast data multiplexed by the data multiplexer, the multiplexing of the received data.

System, method, base station apparatus, and terminal apparatus for mobile communication

In a mobile communication system, which has a plurality of radio network controllers and a number of radio base stations connected to each of the radio network controllers, for sending and receiving user data between a host network and mobile stations via the radio network controllers and radio base stations, a plurality of transmission paths that pass through one or more radio network controllers are set up between a base station, which sends and receives radio signals to and from a mobile station, and the host network. When data is being sent and received using one transmission path from the host network to a base station through a radio network controller, traffic conditions on this transmission path are monitored. When traffic has increased, the user data is dispersed by being passed through a plurality of transmission paths.

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Kawasaki, Japan

Tetsuo Tomita