Fujitsu Corporation

Kohei Iseda

Shigeyuki Unagami

Takao Ogura

Hitoshi Ueno

Kenichi Fukuda

Takafumi Chujo

Fumio Amano

Tomohiko Taniguchi

Yoshihiro Tomita

Koji Okazaki

Mitsuhiro Azuma

Takeo Hamada

Makoto Minoura

Yoshinori Tanaka

Keiji Miyazaki

Yasuki Fujii

Tsuguo Kato

Kenichi Abiru

Hideaki Kurihara

Yasuji Ohta

Koji Tezuka

Shoji Tominaga

Yasuyuki Sato

Kazumi Satoh

Masaaki Ueki

A base station unit of a communication device generates control information identical with those generated by other communication devices. The control information includes information defining regions in a radio frame that are used by the communication device and the other communication devices to transmit data. A terminal unit receives data in accordance with the control information. A switching unit changes the connection among the base station unit, the terminal unit and an antenna. When the control information is output from the base station unit, a switch controller operates the switching unit so that the base station unit may be connected to the terminal unit to output the control information to the terminal unit.

Communication device and method for internally redirecting control information

A wireless base station controls to decrease a transmission power of a first wireless terminal corresponding to signal quality information exceeding lower limitation of a range in which a transmission scheme to be selected remains unchanged and being below a first threshold value, which is greater than the lower limitation and smaller than upper limitation of the range, among a plurality of wireless terminals corresponding to signal quality information belonging to the range, while controlling to increase a transmission power of a second wireless terminal corresponding to signal quality information being equal to or greater than the first threshold value so that a transmission scheme having a better transmission efficiency is selected, thereby to improve throughput of a communication between the wireless base station and the wireless terminal.

Method for controlling transmission power in wireless base station and wireless base station

The present invention relates to a wireless communications method, a wireless control station, and a wireless base station. One of the objects of the present invention is to make it possible to allocate the wireless resources to more than one road side device without interference thereamong. Therefore, the allocation information in the communications regions, used by the wireless base stations in their communications with the wireless terminal from the wireless control station, is sent to each of the wireless base stations, and each of the signal base stations performs communications with the wireless terminal by using the communications region in the wireless frame corresponding to the allocation information received from the wide-area control station.

Wireless communications method, wireless control station, and wireless base station

In a communication network managing system, at a network manager, a management section manages QoS (Quality of Service) capability management information from element managers, a request reception section receives a request for a target QoS capability, and a section and notification section selects a candidate subnetwork such as to satisfy the target QoS capability for which the request has been received by the request reception section, and notifies the corresponding element managers of information about the selection. At the individual element manager, based on the selection information from the selection and notification section of the network manager, a control section controls the corresponding subnetwork.

Communication network managing system, element and network managers therefor, and computer-readable recording medium in which communication network managing program is recorded

A system manages a layered network including an upper layer and a lower layer. In this system, a fault or degraded performance on a lower layer line, which is a connection line in a lower layer, is detected as an event. An upper layer line, which is a connection line in an upper layer affected by the detected event, is extracted. Then, a control is conducted for the extracted upper layer line.

System for managing layered network

Disclosed is a communication network management system for converting action parameters contained in abstract requirements (abstract policy information) regarding a network to parameters conforming to the network technology (ATM, SDH, WDM, etc.) and type of network element to be set, and setting these parameters in the element. Specifically, a policy administration portion converts action parameters contained in abstract policy information to parameters dependent upon network technology and a policy enforcement portion converts the parameters obtained by this conversion to parameters dependent upon type of network element to be set and sets these parameters in the element.

Communication network management system for automatically converting action parameters to network technology dependent parameters using a selected conversion rule conforming to a network technology

In a network management apparatus which manages a network composed of network elements installing different communication technologies such as an ATM, an MPLS, and a Diff-Serv, a QoS guarantee path route candidate retriever retrieves a route enabling a predetermined QoS to be guaranteed or a route enabling the predetermined QoS to be guaranteed by being assigned with the flow identifier from among routes between a source and a destination network elements based on network configuration information, QoS guarantee capability information, the flow identifier assignment capability information, and a QoS guarantee path establishing portion performs a QoS guarantee setting and a flow identifier assignment setting to the network elements on the retrieved route.

Network management apparatus

In a network management system performing a fault management process in a hierarchical network, an upper layer fault manager performs a fault management of an upper layer of a hierarchical network, a lower layer fault manager performs a fault management of a lower layer of the network, an inter-layer node connecting information storage portion manages connecting information between packet switching nodes composing the upper layer and link offering nodes composing the lower layer, and an inter-layer fault notifying portion notifies the upper layer fault manager, upon receiving a notification of a link fault which has occurred on a link between the link offering nodes from the lower layer fault manager, that the packet switching nodes affected by the fault are faulted, based on the connecting information.

NETWORK MANAGEMENT SYSTEM UTILIZING NOTIFICATION BETWEEN FAULT MANAGER FOR PACKET SWITCHING NODES OF THE HIGHER-ORDER NETWORK LAYER AND FAULT MANAGER FOR LINK OFFERING NODES OF THE LOWER-ORDER NETWORK LAYER

A communication path fault restoration system especially applicable to a multiple layered communication network is disclosed, in which spare paths are efficiently used between layers which, at the same time, perform the fault restoration process at high speed. A communication path fault restoration system for a communication network having a multiple layered structure comprises a communication path fault receiver for detecting a faulty path according to the network collection information, a communication path restoration selector for selecting a communication layer and the communication path on the layer for dynamically restoring the fault of the faulty path based on the determination of the information on the faulty path using a predetermined evaluation function, and a communication path restoration processing unit for restoring the fault of the faulty path using the communication path on the selected communication layer.

Communication path fault restoration system

A communication network comprised of communication paths of server layers formed hierarchically by communication paths of client layers, wherein the state of control of the communication paths of a layer being controlled is independently managed in terms of both (i) an administrative state and (ii) a subordinate state indicating influence from communication paths of a server layer, the administrative state of the communication paths of the layer being controlled is changed according to the control for setting and releasing the communication paths, and the subordinate state of the communication paths of a client layer influenced by the change of the administrative state of the communication paths is changed accordingly. At this time, when a subordinate state has already been influenced by a state of control of the communication paths of a server layer, the processing for management is terminated.

Method for controlling communication paths and communication control system in communication network

A dynamic database structuring method includes the steps of (a) clustering transition probabilities among transactions by on-line, (b) forming a hyper graph representing the transition probabilities of the transactions clustered in the step (a) using weighting, (c) partitioning the hyper graph to obtain clustering information related to objects or records to be stored in a storage, and (d) reorganizing a database by rearranging data in the storage by on-line using the clustering information obtained in the step (c), thereby restructuring the database dynamically.

Dynamic database structuring method and apparatus, and database

A method of controlling a telecommunication network management is disclosed. By the method, a managing subject of a telecommunication network carries out a management sequence for management information of the telecommunication network in an agent subject. The method comprises the steps of (a) locating a cache storing the management information in the managing subject; and (b) partitioning attributes of the management information into attribute classes corresponding to demands for cache coherency. In the method, the managing subject carries out the management sequence with a higher speed by accessing the cache, and manages the cache for each attribute class efficiently.

Communication network management apparatus using a cache arranged as a

A system for searching for alternative routes in a network at the time of a failure in a node or link which executes a stage for initiation of failure restoration processing which starts up failure restoration processing in accordance with various types of messages when a failure occurs at a link or node, a stage for processing a restoration message for searching for an alternative route, a stage for processing an acknowledgment message for reserving an alternative route, a stage for processing a cancellation message for cancelling reservation of an alternative route, a stage for processing a confirmation message for confirming a reserved alternative route and making a switching of cross-connect equipment, a stage for processing a cross-connection completion message for notifying the completion of switching of the cross-connect equipment to the nodes, a stage for processing a cross-connection acknowledgment message for confirming the completion of switching of all of the cross-connect equipment on the alternative route, and a stage for processing a cross-connection confirmation message for performing processing to complete the search for an alternative route and which thereby searches for alternative routes autonomously in a distributed manner.

Searching system for determining alternative routes during failure in a

A variable rate coder for transforming an input signal into a low bit rate digital signal, comprising: a plurality of coding units each comprising an output quantizer having a different number of output bits, and each independently transforming the input signal into a respective compressed digital signal. A plurality of bit rate determined circuits are provided to determine an output of one of the plurality of coding units as a candidate output of the coder by a respective individual determining method, in which method, the quality of the signal which is regenerated from the output of each coding unit is compared with an individual predetermined quality evaluating standard, and then the candidate output of the coding unit having the smallest number of output bits, among the candidate outputs of coding units satisfying each standard, is determined as the actual output of the coder. One candidate output, among the plurality of the determined candidate outputs and, which is further determined by a most suitable determining method relative to the level of the input signal, thus is selected as the actual output of the coder. Further, when the number of the output bits in each of the coding units can be variably set, the most suitable number of output bits for the actual output of the coder is calculated based on prediction gains of the coding units, a required signal-to-noise ratio of the coder, and an ADC signal-to-noise ratio at the analog to digital converter, and the number of the output bits in each of the coding units is set based on the above calculated value, before the above operation by the bit rate determining circuits.

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Kawasaki, Japan

Kohei Iseda