Fujitsu Corporation

Other

Kimio Watanabe

Ichiro Ayukawa

Kazutoshi Kawamura

Hisamichi Hazama

Shingo Mizuno

Yuji Shiraishi

Kimihiko Yoshimura

Takayoshi Ode

Masaaki Takase

Tadayuki Sakama

Yoshiko Koizumi

Yasushi Miyagawa

Tadato Tomikawa

Yuta Aono

Minoru Inatsu

A communication apparatus includes: a monitor configured to monitor a first communication amount in first communication between a first communication apparatus and a terminal apparatus and/or a second communication amount in second communication between a second communication apparatus and the terminal apparatus, the second communication apparatus performs communication with the terminal apparatus; and a transmitter configured to transmit information relating to monitoring result by the monitor to a communication control apparatus that is able to perform policy control and charging control.

Communication apparatus, communication method, communication system, and node apparatus

A radio communication system, a first application server includes a communicator configured to transmit to and receive from a terminal apparatus individual data via a first base station apparatus, the first base station apparatus includes a first controller configured to request to a second base station apparatus first control information regarding to a second application server connected to the second base station apparatus and second control information for the terminal apparatus to connect to the second base station apparatus, and a transmitter configured to transmit to the terminal apparatus the second control information notified from the second base station apparatus, at least, the second base station apparatus includes a second controller configured to notify the first and second control information to the first base station apparatus, the terminal apparatus receives at least the second control information from the first base station apparatus.

Radio communication system, base station apparatus, and control information transmission method

A communication device forms a first cell and performs radio communication with a mobile station. The communication device includes a first information acquiring unit that acquires a first traffic volume corresponding to a traffic volume that occurs in the first cell at a first time, a second information acquiring unit that acquires a second traffic volume corresponding to a traffic volume that occurs at the first time in each of second cells of second communication devices adjacent to the communication device, a calculating unit that calculates a predicted value, in a future relative to the first time, of a traffic volume occurring in the first cell on the basis of the first traffic volume and the second traffic volume, and an adjusting unit that adjusts a transmission parameter of the communication device on the basis of the predicted value.

Communication device, control device, and method for adjusting transmission parameter

An order wire monitoring method monitors form a monitoring control terminal a quality of an order wire line which couples transmission apparatuses via multiplexed lines which multiplex and transmit main and order wire signals. A transmission apparatus which is to transmit test data and a transmission apparatus which is to receive test data are specified from the monitoring control terminal, and the test data are transmitted from a specified transmitting apparatus to the order wire line in response to a start of test instructed from the monitoring control terminal. The monitoring control terminal monitors the quality of the order wire line based on information received from the specified receiving apparatus via the specified transmitting apparatus.

Transmission apparatus, order wire transmission system and order wire monitoring method

A transmission system comprises a plurality of transmission apparatuses which use a single channel commonly. Each transmission apparatus comprises switches for connecting and disconnecting transmission paths with adjacent transmission apparatuses, a line signaling-signal monitoring and detecting portion, and a network dividing logic portion which opens and closes the switches based on an output of the line signaling-signal monitoring and detecting portion. The network dividing logic portion closes switches of transmission paths between transmission apparatuses which perform a telephone conversation and opens the other switches.

Transmission system and transmission apparatus

When a wireless channel fails, a working signal and a protection signal are synchronized and switching is performed without instantaneous disconnection. Each working unit of a plurality of working units is provided with a wireless-channel failure detector for detecting a failure that has occurred in a working wireless channel; a synchronization detecting circuit for detecting synchronization between a working wireless channel and a protection wireless channel; a changeover switch for selecting a signal from either the protection wireless channel or a working wireless channel without instantaneous disconnection; and a unit failure detector for detecting a failure that requires switching of a unit. When a failure develops in a wireless channel and a working wireless channel and the protection wireless channel are synchronized, a radio protection switching device controls the changeover switch to switch between working and protection wireless channels without instantaneous disconnection. Further, when failure that requires switching of a unit occurs, the radio protection switching device controls a unit changeover switch to switch between a working unit and the protection unit.

SDH wireless transmission apparatus

A communication monitoring and controlling apparatus for easily collecting monitoring information is connected to an existing network composed of a plurality of communication equipment. A management information collecting unit collects management information of each of the communication equipment. The management information is in an existing network management information format. A format converting unit converts the management information in the existing network management information format into management information in a new-type network management information format. The new-type network management information format is a format used by the new-type network, and handles the existing network composed of the communication equipments as one network element. The converted management information is transmitted to at least one operation system of the new-type network by a transmitting unit.

Communication monitoring and controlling apparatus

An SDH/PDH monitoring and integrating apparatus collects control data generated in a monitoring unit employed in each PDH radio apparatus in a PDH communication network, transforms the control data into a control command that can be processed in an SDH communication network and transmits the control command to the SDH communication network. The control command transmitted to the SDH communication network arrives at an operation system by way of components such as a DCC (Digital Communication Channel), a monitoring unit employed in an SDH radio apparatus or employed in an SDH transmission apparatus and an X.25 network. The operation system extracts control data generated in the PDH communication network from the control command, executing the same processing as that of the conventional PDH monitoring panel for the extracted control data.

SDH-communication-network/already existing communication network

A method of transferring information to a plurality of offices connected in series in a network includes the following steps. A step (a) is transferring the information from a server office to an intermediate office being substantially intermediate in the plurality of offices. A step (b) is setting the intermediate office which received the information in the step (a) to the server office. A step (c) is virtually dividing the plurality of offices into two groups which respectively include the server offices. And, a step (d) is repeating the steps (a) to (c) for each of the two groups.

Method and apparatus for transferring information to a plurality of

A control system for a communication apparatus has capability of coping with bus extension. The control system includes a control section and a plurality of controlled sections connected to the control section via a bus. Each controlled section accommodates at least one object to be controlled. The control section has a first interface for extension bus generation which includes a latch section and a bus transmission section. The controlled section has a second interface section for extension bus generation which includes a reception section, a judgment section, and a permission signal send-back section. The bus is formed by a bus which complies with a standard regarding mutual connection between apparatuses in a data communication system so as to send and receive pieces of information, each including a predetermined number of bits, and control signals. This makes it possible to suppress the hardware cost of channel sections and to efficiently perform highly functional monitoring and controlling.

Control system for coping with bus extension in controlling a

Method for transferring data to a plurality of modes connected in series

A memory controlling apparatus is provided with: a record information memory, a vacant address controller for serially storing the address data which specifies the addresses where record information referred to has been stored in order of reference, supplying the address data in the order of storage, and designating the addresses for storing the record information on new events by the supplied address data; and a LRU (least recently used) unit for storing the address data; and a LRU unit for storing the address data which specifies the address of the memory at which record information is stored in the order of storage. When a new event occurs, a control unit obtains the address at which the oldest record information is stored from the LRU unit, if no address is designated by the vacant address controller, and stores the record information on the new event at the address obtained, while storing the record information on the new event at the designated address when the address is designated by the vacant address controller.

Memory control method and apparatus therefor

A PN code demodulator reduced in hardware scale and a code-division multiplex communication apparatus using the PN code demodulator are provided wherein the quantity of external noise is detected during communications and the number of multiplexed channels can be immediately changed in accordance with the quantity of external noise. In the PN code demodulator, an exclusive-OR unit derives an exclusive-OR of a PN code and a baseband signal modulated by the PN code. A counting unit counts the number of anticoincidence bits at which the baseband signal does not coincide with the PN code, based on the output of the exclusive-OR unit over a predetermined code length. A determining unit and a restoring unit restore a data signal in accordance with whether the number of anticoincidence bits counted by the counting unit has reached the value of the (predetermined code length+1)/2. A correlation value output unit obtains a correlation value based on the count value of the counting unit. In the code-division multiplex communication apparatus, the number of multiplexed channels is controlled in accordance with the correlation value.

Code-division multiplex communication apparatus

A code-division multiplex communication apparatus for carrying out multiplex communication by using pseudo noise (PN) codes and an application system thereof are provided, which have high SN ratio and can be used in an environment wherein feeble radio waves are to be received or the strength of output radio waves is regulated. Exclusive-OR circuits output exclusive ORs each based on data and a PN code associated with the corresponding channel, and a majority logic circuit performs a majority logic operation on the exclusive ORs. Namely, the majority logic circuit outputs a logical '1' or '0' that is greater in number. The majority logic output is subjected to phase modulation and is then transmitted as a transmission signal. The transmission signal is demodulated at a receiving side, based on the same PN codes as those used at the transmitting side, thereby demodulating the data. The code-division multiplex communication apparatus is applicable to radio LAN and FA system.

Growing community of inventors

Kawasaki, Japan

Kimio Watanabe