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
AssigneeCanon Kabushiki Kaisha
InventorsNoboru Yamamoto, Toru Nakata, Kazuhiko Hojo
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Abstract
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.
Claims17
A node device for connecting a plurality of sub transmission paths, via which signals are sent to terminal devices, to a plurality of channels of a main transmission path for transferring signals between nodes, comprising:
- a plurality of insertion means, respectively corresponding to said plurality of channels, for inserting signals sent via said plurality of sub transmission paths into said main transmission path;
- a plurality of interface means, respectively corresponding to said plurality of sub transmission paths, for connecting said plurality of sub transmission paths;
- changing means for changing connection relations between said plurality of insertion means and said plurality of interface means in accordance with a predetermined order;
- separation means, respectively corresponding to the plurality of channels, for separating a signal to be output onto one of said plurality of sub transmission paths from signals sent via said plurality of channels;
- a plurality of second interface means, respectively corresponding to said plurality of sub transmission paths, for connecting said plurality of sub transmission paths;
- and
- second changing means for changing connection relations between said plurality of separation means and said plurality of second interface means in accordance with a predetermined order.
A node device for connecting a plurality of sub transmission paths, via which signals are sent to terminal devices, to a plurality of channels of a main transmission path for transferring signals between nodes, comprising:
- a plurality of output means, respectively corresponding to said plurality of channels, for outputting signals sent via said main transmission path to said plurality of sub transmission paths;
- a plurality of interface means, respectively corresponding to said plurality of sub transmission paths, for connecting said plurality of sub transmission paths;
- changing means for changing connection relations between said plurality of output means and said plurality of interface means in accordance with a predetermined order;
- and
- second changing means for changing connection relations between a plurality of separation means and a plurality of second interface means in accordance with a predetermined order.
A node device for connecting a plurality of sub transmission paths, via which signals are sent to terminal devices, to a plurality of channels of a main transmission path for transferring signals between nodes, comprising;
- a plurality of storage means, respectively corresponding to said plurality of channels, for storing signals sent via said plurality of channels;
- changing means for changing connection relations between said plurality of sub transmission paths and said plurality of storage means in accordance with a predetermined order;
- and
- copy means for forming a copy of a signal to be stored in one of said plurality of storage means.
A node device for connecting a plurality of sub transmission paths, via which signals are sent to terminal devices, to a plurality of channels of a main transmission path for transferring signals between-nodes, comprising:
- a plurality of storage means respectively corresponding to said plurality of sub transmission paths, for storing signals sent via said plurality of sub transmission paths;
- changing means for changing connection relations between said plurality of channels and said plurality of storage means in accordance with a predetermined order;
- and
- copy means for forming a copy of a signal to be stored in one of said plurality of storage means.
Dependencies are inferred from the claim text.