Fujitsu Corporation

Other

Tomonori Kumagai

Kazunari Kobayashi

Tetsuo Tomita

Daisuke Nitta

Eiji Ikeda

Satoshi Watanabe

Takahiro Yamada

Masashi Yamaguchi

Hajime Hasegawa

Yuki Shinada

Tatsuru Nakagaki

Noboru Hasegawa

Takeshi Masubuchi

Daisuke Inagaki

Seiya Yamazaki

Takeshi Yonekura

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 mobile equipment makes a connection setting by setting a connection to a base station apparatus, and after a communication with the base station apparatus is disconnected, makes a re-connect request to a base station apparatus that is capable of continuing the communication. The mobile equipment is allocated with a mobile equipment identifier for identifying the mobile equipment when making the connection setting, and is notified of the mobile equipment identifier and an address of a network layer of the base station apparatus to which the connection setting is made. The mobile equipment includes a connection re-establishment message processor to generate a re-connect request that includes the address and the mobile equipment identifier, and to send the re-connect request to the base station apparatus that is capable of continuing the communication, and a connection control unit to re-establish the connection to the base station apparatus that is capable of continuing the communication. The connection control unit re-establishes the connection according to mobile equipment information related to the connection setting acquired by the base station apparatus that is capable of continuing the communication, based on the address and the mobile equipment identifier.

Mobile equipment, base station apparatus and communication control method

An algorithm in a multi-core processor having a plurality of cores for deciding processing allocation to each core to distribute the processing load thereof, and an efficient processing allocation algorithm simplified for software engineers are established. In order to achieve the above processing load distribution, the multi-core processor includes a plurality of basic modules divided into minimum configuration units, each having a uniform input/output format interface, so as to perform required processing contents in the overall processor. As an initial allocation, the above plurality of basic modules are allocated in distribution to the above plurality of cores, and subsequently, based on functional information of each core, the above plurality of initially allocated basic modules are relocated either periodically or at appropriate timing.

Multi-core processor

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 controller which is assigned with the wireless resources for a plurality of wireless zones and a plurality of wireless base stations communicably connected to the controller, wherein the controller is operable to assign a part of the assigned wireless resources to the wireless zone formed by any of the wireless base stations. According to this, it is possible to introduce and run a great number of wireless base stations at a low cost without increasing or modifying the number of the superordinate devices such as RNC.

Wireless communication system and method of assigning wireless resources in the same system and controller

A mobile communication system includes a radio network control apparatus having inside a function block for processing a downlink shared channel and table means for storing various setting information related to the downlink shared channel communication and the downlink shared channel multi-cast communication. According to the information, a multi-cast communication (including uni-cast communication) is realized by using the downlink shared channel for one or more mobile apparatuses. Moreover, a base station has a function to transmit the downlink shared channel data and signaling data received from a radio network control apparatus, to a mobile apparatus via a radio line. Furthermore, it is possible to multi-cast data selectively to a particular mobile apparatus being call-connected.

Mobile communication system using a downlink shared channel

A communications system having an ATM transmission line and an IP transmission line is disclosed that includes a base station capable of communicating with a mobile terminal through a radio link; and a radio network controller capable of communicating with the base station through the ATM or IP transmission line. The radio network controller includes a division part dividing transmission data into signals of a predetermined data size; a transmission part transmitting the divided signals to the base station at predetermined time intervals; a retransmission part retransmitting the signals transmitted to the base station when a response signal from the mobile terminal is not received within a predetermined period; a measuring part measuring a signal response period in a communications channel between the radio network controller and the mobile terminal through the base station; and a determination part determining the predetermined data size based on the measured response period.

Radio network controller

A packet transferring/transmitting method is provided for use in a mobile communication system. In this packet transferring/transmitting method, an upper nodedetermines the implementation of handover (determination step), and a handover addressing nodetransfers, of a plurality of packets, a non-transmitted residual packet to a handover addressed node, and the upper nodetransmits a new packet to the handover addressed node(transfer/transmission step). This enables maintaining the number of users to be accommodated while securing a wide bandwidth, sharing a line with high efficiency at soft handover, avoiding data residual in the case of the employment of variable communication rate, and preventing an increase in retransmission.

Packet transferring/transmitting method and mobile communication system

A base station accommodation method and mobile communication system which allows the installation of many micro-miniature BTS devices are provided. The mobile communication system includes a plurality of base stations which accommodate a plurality of mobile terminals respectively; a plurality of first base station control devices, each of which accommodates a predetermined number of base stations out of the plurality of base stations; and a second base station control device which accommodates the plurality of first base station control devices, wherein each of the plurality of first base station control devices comprises, for supporting information identifying a mobile terminal, a mobile terminal data base to store identification information which identifies a base station to which the mobile terminal is subordinate, and a station data base to store an address of the base station.

Mobile communication system

A mobile terminal includes a reception unit to receive, from at least one of a plurality of communication systems, an initial beacon containing information for establishing communication according to each of the plurality of communication methods, a request unit to generate a request by use of the initial beacon to transmit the request to the at least one of the plurality of communication systems, and a determination unit to determine, based on information as a response to the request, the communication method and the frequency band, which are to be used in a time zone by the mobile terminal.

Mobile terminal

A data center includes an individual storage unit having storage areas for respective user apparatuses, a shared storage unit having a storage area for sharing by the user apparatuses, a unit configured to store data received from an external node in one of the individual storage unit and the shared storage unit that is selected according to predetermined criteria, a unit configured to generate a data arrangement list according to statistics of the received data and predetermined cache data arrangement conditions, and a unit configured to transmit an instruction signal to at least one of the shared storage unit and the individual storage unit according to the data arrangement list to cause data stored in the at least one of the shared storage unit and the individual storage unit to be transferred to a cache server provided on a core network or on a radio access network.

Efficient utilization of cache servers in mobile communication system

It administers a plurality of wireless base stations grouped into a plurality of groups, and performs the processing about the management, control and maintenance of the wireless base stations selectively for each of the groups. This enables the efficient management, control and maintenance processing of the wireless base stations.

Wireless communication system, method of management, control and maintenance, and apparatus for the same

A data-cache apparatus for providing a data-cache function to a radio communications system is disclosed. The data-cache apparatus includes a data distinguishing unit () to distinguish an attribute of data requested by a mobile station, a cache memory () that temporarily stores data provided to a mobile station, and a data request processing unit (and) to acquire requested data from the cache memory or an external server based on a result of distinction carried out by the data distinguishing unit. The data request processing unit performs operations of searching for the requested data in the cache memory, and storing the acquired data in the cache memory.

Data-cache apparatus and a data-cache method used by a radio communications system

A mobile communication system includes a mobile communication network connected to a core network (CN) and a plurality of radio network nodes included in the mobile communication network (RAN). Network resources for a data flow between a data transmission node and a data reception node that passes through the CN and RAN are reserved on the basis of RSVP. A region for refreshing a reservation state of network resources concerning the flow is divided into a CN side and an RAN side by taking a predetermined radio network node through which the flow passes as a boundary. Refreshment on the RAN side is conducted with a frequency higher than that of refreshment on the CN side.

Growing community of inventors

Kawasaki, Japan

Tomonori Kumagai