Fujitsu Corporation

Fujitsu Component Limited

Hajime Hasegawa

Teruyoshi Watanabe

Hideo Miyazawa

Toshihiro Kusagaya

Yuji Matsumoto

Kazunari Kobayashi

Daisuke Nitta

Tomonori Kumagai

Yoshio Tamura

Kenji Fukuda

Keizo Watanabe

Osamu Yamamoto

Tadayuki Sakama

Shunichi Murasawa

Yoshiaki Fukunaga

Yutaka Isonuma

Tatsuji Hamamura

Yasuharu Iwata

Ryuichi Karino

Hirohisa Ishikawa

Nobumasa Kabashima

A traffic control device that controls traffic of data transmitted from mobile units that belong to different groups, includes a memory, and a processor coupled to the memory, configured to switch an output destination for the data in accordance with a group and a type of the data, store the data to a plurality of data storage sections on a first-in-first-out basis, adjust an output timing for the stored data in accordance with the group and the type of the data, and attach an identifier to the data output from the plurality of data storage sections in accordance with the group and the type of the data.

Traffic control device, traffic control method, and communication system

In a wireless base station, a specific information receiver receives specific information delivered from a higher-level device to a wireless terminal. A specific information deliverer delivers the specific information to the wireless terminal via multiple physical channels activated in a wireless base station. Where a common channel via which information is periodically broadcast to multiple wireless terminals and a shared channel of which available radio resources are allocated to wireless terminals to transmit voice data and the like to the terminals are activated in the wireless base station, for example, the specific information deliverer can deliver the specific information using the common channel if the wireless terminal is in a standby state, and can deliver the specific information using the shared channel if the wireless terminal is in a communicating state.

Wireless base station and method for emergency information delivery

A wireless communication system includes a first base station and a second base station that respectively communicate with a mobile station by using a wireless resource. The first base station includes a resource control unit that controls allocation of the wireless resource to the second base station. The second base station includes a communication unit that communicates with the mobile station by using the wireless resource allocated from the first base station.

Wireless communication system, communication control method, and base station

A power control apparatus performs data telecommunication with a mobile station and receives data quality information transmitted therefrom in a wireless telecommunication system. Then it judges a reception quality of the mobile station by using the received data quality information and changes a target power quality which is set up for the mobile station, followed by notifying the mobile station of the changed target power quality.

Power control apparatus for wireless telecommunication system

In a wireless telecommunication system, a power control apparatus performs a data telecommunication with a control target apparatus and receives data arrival acknowledgement information transmitted therefrom in a data retransmission layer. Then it judges a reception quality of the control target apparatus by using the received data arrival acknowledgement information and changes a target power quality which is set up for the control target apparatus based on a result of the judgment. And it notifies the control target apparatus of the changed target power quality.

A wireless communication system having a plurality of wireless base stations (BSs), and a second BS included under at least one of a first BS among the plurality of BSs and usable by a specified mobile station, the wireless communication system includes registering first identifiers as identifiers of the first BS and a second identifier as an identifier of the second BS in the specified mobile station in advance. The wireless communication system includes transmitting first information to the second BS when an identifier of a present cell is other than the first and second identifiers, and transmitting second information to the second BS when the identifier of the present cell is the first or second identifier, and controlling an operation of the second BS based on the received first or second information.

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

In a radio mobile communication system adopting a hierarchical cell structure comprising a plurality of layers having respective cells of different sizes, the threshold value of the number of times of cell reselections and/or the threshold value of the time required to measure the number of times of cell reselections are set for each layer. A mobile station device compares the number of times of cell reselections in a specific time and/or the time required for the number of times of cell reselections to reach a specific value with the threshold values and selects a transfer target cell.

Cell selection method, mobile station device and mobile communication system in hierarchical cell structure

To provide a technique of making it possible to shorten a time taken by channel switching. Further, to provide a technique of enabling simplification of a channel switching procedure. A radio network controller for assigning, to each wireless terminal connected to a wireless network, one of an individual channel exclusively used by the wireless terminal and a common channel shared with at least one wireless terminal different from the wireless terminal as a communication channel, includes: a determination portion for determining that an individual channel is to be assigned to a wireless terminal; and an assignment portion for, when the assignment of the individual channel has been determined, assigning an individual channel resource secured and held before the determination to the wireless terminal.

Radio network controller and channel assignment method of simplifying and curtailing the channel switching time

A source eNB determines whether an X2 interface is established between the source eNB and a target eNB when the source eNB performs a handover of a UE under the control of the source eNB to the target eNB. When the X2 interface is not established between the source eNB and the target eNB, the source eNB inquires with an address management node about the IP address of the target eNB. Upon receipt of the IP address of the target eNB from the address management node, the source eNB accesses the target eNB using the IP address and establishes the X2 interface. After establishing the X2 interface, the source eNB performs a handover of the UE to the target eNB.

Communication system

A wireless base station connected together with another base station to a superior apparatus, comprises, a forwarding controller to forward data received from the superior apparatus to the mobile station in a case of receiving none of a handover request message from the mobile station connected to the wireless base station, and to forward a part or the whole of the data received from the superior apparatus to the another wireless base station after receiving the handover request message from the mobile station, and a notifying unit to notify the another wireless base station of information used for the another wireless base station determining a reception allowable period of the data forwarded from the wireless-base station.

Mobile communication system

Radio equipment (RE) is shared so as to use a plurality of types of radio signals, and data (IQ data) of the plurality of types of radio signals and monitoring control data are variably arranged in a frame for transmitting and receiving data between the RE and radio equipment controls (RECs). A plurality of types of data are simultaneously transmitted and received by one communication link between the RE and the RECs.

Method and apparatus for transmitting data between radio equipment and radio equipment controls

A mobile station-side acquirer acquires the MTU value notified by a base station-side notifier and stores the acquired MTU value in a mobile station-side memory. A mobile station-side transmitter transmits data to a destination with the data size set to be smaller than or equal to the MTU value stored in the mobile station-side memory. A base station-side acquirer acquires the MTU value of the transmission path and stores the acquired MTU value in a base station-side memory. The base station-side notifier notifies the mobile station of the MTU value stored in the base station-side memory.

Mobile communication system, mobile communication method, and communication apparatus

A mobile communication system includes a plurality of radio base stations forming respective radio zones and a mobile station selecting a wait zone and a base station to which a request for a message channel is to be issued. Each of the plurality of radio base stations is assigned an order of priority. Information relating to the order of priority is used by the mobile station to select a wait zone and a base station to which a request for a message channel is to be issued.

Mobile communication system enabling efficient use of small-zone base stations

A wireless communication system includes a multi service supplying unit which transmits the same data to a plurality of user equipment and a quality evaluation result collecting unit which collects quality evaluation results of a multi service from the plurality of user equipment. The wireless communication system includes a resource controlling unit which controls shared wireless communication resources used for the multi service according to the quality evaluation results.

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Kawasaki, Japan

Hajime Hasegawa