Fujitsu Corporation

Fujitsu Semiconductor Limited

Yasushi Sakai

Hitoshi Ogawa

Hideo Makabe

There is provided a data transfer method in an IEEE1394 system including a band request node and a transfer band management node. The method includes generating, at the band request node, a transfer request that can detect a data amount of transfer data and transmitting the transfer request from the band request node to the transfer band management node, determining, by the transfer band management node, whether a transfer band requested by the transfer request is ensured or not, notifying, from the transfer band management node, the band request node of the determination result, and transferring data from the band request node according to the determination result.

Data transfer method

A method for controlling data transmission in a network system configured by a first node, a second node, and a third node. The first node has a first port connected to the second node and a second port connected to the third node. The first node enables data received by the first port from the second node to be transmitted by the second port to the third node. The received data includes information of the node to which the received data is addressed. The method compares the information of the first node with the address information included in the received data, temporarily disconnects the third node from the first node when the received data is not addressed to the third node.

Method and device for controlling data transmission

An IEEE 1394 protocol controller includes a data transfer determination circuit which determines whether communication is being performed over the network. A reset control circuit connected to the determination circuit detects the connection of a new node to the network (e.g., hot plugging) and reconfigures the network to include the new node subsequent to the completion of the data transfer based on the determination result of the determination circuit.

Method and system for controlling reset of IEEE 1394 network

An interface controller adaptively changes the data transfer rate of data being transferred between two or more devices depending on whether one of the devices is powered by an internal power supply and on the destination of the data. The controller includes a clock generator that generates a clock signal, a transfer unit that performs one of a first data transfer and a second data transfer at a transfer rate based on the clock signal, and a control circuit for adaptively changing the frequency of the clock signal depending on whether the first or second data transfer is to be performed.

Growing community of inventors

Kasugai, Japan

Yasushi Sakai