Network system for data transmission among plural communications stations connected to a communication medium
AssigneeCanon Kabushiki Kaisha
InventorsYasuo Nakamura, Makoto Chida
Life of this patent
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Abstract
There is disclosed a data transmission network system for data transmission among plural stations by token passing method. A station which has acquired the right of communication for the first time transmits relevant information to all other stations in the network so that smooth token passing can be achieved without the use of a monitor station in the network.
Claims17
A network system including a plurality of nodes, connected to each other through a communciation medium, wherein only a node to which a communication right has been assigned is able to perform data transmission between that node and another node, wherein each of the nodes comprises:
- means for assigning the communication right to another node of said plurality of nodes;
- means for transmitting a specific command which contains data indicating an address of the transmitting node to all of the other nodes of said plurality of nodes, when the communication right is assigned first from any one of the other nodes of said plurality of nodes after its entry into the network system;
- and
- means for recognizing the address of the new entry node into the network system on the basis of the data contained in the specific command, upon receipt of the specific command transmitted from another node.
A network system including a plurality of nodes, connected to each other through a communication medium, wherein only a node to which a communication right has been assigned is able to perform data transmission between that node and another node, wherein each of the nodes comprises:
- means for assigning the communication right to another node of said plurality of nodes;
- means for transmitting a specific command to all of the nodes of said plurality of nodes, when the communication right is assigned first from any one of the other nodes of said plurality of nodes after its entry into the network system;
- and
- means for informing the node which transmitted said specific command of addresses of the nodes constituting the network, in the event that the communication right is assigned from another node after receipt of said specific command.
A network system including a plurality of nodes, connected to each other through a communication medium, wherein only a node to which a communication right has been assigned is able to perform data transmission between that node and another node, wherein each of the nodes comprises:
- means for assigning the communication right to another node of said plurality of nodes;
- means for detecting new entry of another node into the network system;
- means for transmitting a specific command which contains data indicating an address of the new entry node to all of the other nodes of said plurality of nodes, when the communication right is assigned from any one of the other nodes of the plurality of nodes after detection of the new entry of another node into the network system;
- and
- means for recognizing the address of the new entry node into the network system on the basis of the data contained in the specific command, upon receipt of the specific command transmitted from another node.
Dependencies are inferred from the claim text.