Canon Kabushiki Kaisha

Kazuhiko Hojo

Mitsuru Yamamoto

Toru Nakata

Noboru Yamamoto

Atsushi Tamura

In order to flexibly use the transmission capacity upon transmitting a signal between node devices, the downstream node device requests the upstream node device to decrease the number of outputs in a given channel prior to insertion of a signal into that channel. The upstream node device decreases the number of outputs in that channel by, e.g., distributing the outputs in the channel to other channels in response to the request.

COMMUNICATION SYSTEM, COMMUNICATION APPARATUS WHICH CAN BE CONNECTED TO COMMUNICATION SYSTEM, CONTROL METHOD FOR CONTROL SYSTEM, AND CONTROL METHOD FOR COMMUNICATION APPARATUS WHICH CAN BE CONNECTED TO COMMUNICATION SYSTEM

In the node device of a network of performing communication while changing the communication channel, a plurality of packets are transmitted to a terminal device in a different order from the reception order of a plurality of received packets without rearranging the packets in the terminal device. In addition, the packets are transmitted to the terminal device with traffic characteristics based on traffic characteristics used to transmit a plurality of packets.

Node device, communication network having a plurality of node devices, and control method therefor

Signals are evenly distributed and transmitted using a plurality of channels. Multicast and broadcast communications are efficiently made. Signals from each sub transmission paths are distributed onto a plurality of channels to send them via these channels. Furthermore, signals are inserted into the channels by finding empty packets from the channels, thus allowing input of signals to the channels that transfer various kinds of signals. Upon multicast or broadcast communications, an input signal is copied in correspondence with a plurality of channels.

The present invention discloses a network system for an interactive transmission in first and second directions. The network system includes a plurality of node devices, and a first node device of the node devices can selectively output a signal in the first direction or perform the returning output of a signal. A second node device adjacent to the first node device outputs a signal to the first node device through a channel which is used by the first node device for the returning output, hence the first and second node device are controlled such that those first and second node devices do not use the returning channel of the first node device concurrently.

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Kawasaki, Japan

Kazuhiko Hojo