Communication method and communication system
First Claim
1. A communication method for conducting communication among nodes that form a communication network of bus type by using set communication parameters, the communication method comprising:
- a designation step of designating any one of said nodes as a master node, designating other nodes as slave nodes, and forming a logical star connection;
a determination step of determining communication parameters between said master node and respective slave nodes; and
a communication step of conducting communication between said slave nodes via said master node by using communication parameters determined in the determination step.
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Abstract
The communication system conducts communication among nodes N1 to N4 that form a communication network of bus type by using set communication parameters. The communication system includes one master node N1 selected from among the nodes N1 to N4; and one or more slave nodes N2 to N4 that are nodes N2 to N4 other than the master node N1, the one or more slave nodes logically star-connected to the master node N1, each of the one or more slave nodes conducting communication with another node N2 to N4 via the master node N1 by using communication parameters negotiated with the master node N1.
28 Citations
12 Claims
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1. A communication method for conducting communication among nodes that form a communication network of bus type by using set communication parameters, the communication method comprising:
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a designation step of designating any one of said nodes as a master node, designating other nodes as slave nodes, and forming a logical star connection;
a determination step of determining communication parameters between said master node and respective slave nodes; and
a communication step of conducting communication between said slave nodes via said master node by using communication parameters determined in the determination step. - View Dependent Claims (2)
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3. A communication method for conducting communication among nodes that form a communication network of bus type by using set communication parameters, the communication method comprising:
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an initial step of designating a node that would become best in transmission quality when a logical star connection with other nodes were conducted, as a master node based on transmission qualities between nodes, designating other nodes as slave nodes, and star-connecting the nodes logically; and
an alteration step, responsive to existence of such a node that would become best in transmission quality when logical star connections with other nodes were conducted in response to connection of a new node or a change of a communication state, of altering said node to a master node and altering a current master node to a slave node. - View Dependent Claims (4, 5, 6)
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7. A communication method for conducting communication among nodes that form a communication network of bus type by using set communication parameters, the communication method comprising:
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a master designation step of designating a node that becomes best in transmission quality between said node and other nodes, from among all nodes, as a master node;
a grouping step of grouping nodes other than said master node into node groups each having favorable transmission qualities;
a sub-master designation step of designating, for each of said grouped node groups, a node having best transmission qualities with respect to other nodes in its own node group and said master node, as a sub-master node; and
a logical connection step of logically star-connecting said sub-master node to said master node and logically star-connecting other nodes in its own node group to said sub-master node.
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8. A communication system for conducting communication among nodes that form a communication network of bus type by using set communication parameters, said communication system comprising:
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one master node selected from among said nodes; and
one or more slave nodes that are nodes other than said master node, said one or more slave nodes logically star-connected to said master node, each of said one or more slave nodes conducting communication with another node via said master node by using communication parameters negotiated with said master node. - View Dependent Claims (9)
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10. The communication system for conducting communication among nodes that form a communication network of bus type by using set communication parameters, wherein each node comprises a processing unit, and
if its own node is designated as a master node logically star-connected to other nodes and if there exists such a node that would become best in transmission quality when logical star connections with other nodes were conducted in response to connection of a new node or a change of a communication state, then said processing unit conducts processing of ordering alteration of said node to a master node and transferring communication parameters among all nodes currently held to a master node after alteration.
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12. A communication system for conducting communication among nodes that form a communication network of bus type system comprising:
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a master node that is selected from among all nodes and that is best in transmission quality with respect to other nodes;
a sub-master node, for each of node groups grouped as node groups having favorable transmission qualities, having best transmission qualities with respect to other nodes in its own node group and said master node, said sub-master node being logically star-connected to said master node; and
slave nodes logically star-connected in each node group to said sub-master node.
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Specification