Multiaccess communication system
First Claim
1. In a multiaccess communication method, when a data communication is to be carried out among a plurality of nodes which are connected to a common transmission path having a multichannel structure using a packet, a channel selecting means switches to a selected channel by exchanging packets for selecting a data transferring channel in advance between nodes, between which a data communication is desired, through a dedicated control channel which is allocated commonly to each of said nodes such that it establishes a reception accepting condition whenever said nodes have no session.
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Abstract
A multiaccess communication system includes a common transmission path having a multichannel structure and a plurality of nodes connected to said common transmission path. There is provided an exclusive control channel common to each of said plurality of nodes, and predetermined packets for selecting a channel for data transfer are exchanged in advance between nodes, between which a data communication is desired, through the control channel, thereby establishing a data transferring channel.
132 Citations
45 Claims
- 1. In a multiaccess communication method, when a data communication is to be carried out among a plurality of nodes which are connected to a common transmission path having a multichannel structure using a packet, a channel selecting means switches to a selected channel by exchanging packets for selecting a data transferring channel in advance between nodes, between which a data communication is desired, through a dedicated control channel which is allocated commonly to each of said nodes such that it establishes a reception accepting condition whenever said nodes have no session.
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10. A multiaccess communication system comprising:
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a common communication path having a multichannel structure including a dedicated control channel and data transmitting channels; a plurality of nodes each of which is connected to said common communication path for carrying out a data communication using packets between selected ones thereof; wherein at least one of said plurality of nodes includes channel selecting means for switching to a selected channel by exchanging predetermined packets for selecting a data transmitting channel in advance between nodes, between which a data communication is desired, through said control channel which is commonly allotted to each of said plurality of nodes so as to establish a reception accepting condition at all times whenever said nodes have no session; and
means for resetting to said control channel upon detection of an abnormality in data communication in said transmitting channel. - View Dependent Claims (11, 12, 13)
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14. A multiaccess communication system comprising:
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a common communication path having a multichannel structure; a plurality of nodes each of which is connected to said common communication path for carrying out a data communication using packets between selected ones thereof; wherein at least one of said plurality of nodes includes channel selecting means for switching to a selected channel by exchanging predetermined packets for selecting a data transmitting channel in advance between nodes, between which a data communication is desired, through a dedicated control channel which is commonly allotted to each of said plurality of nodes so as to establish a reception accepting condition at all times whenever said nodes have no session; and
means for resetting to said control channel upon detecting the fact that a data communication time period has exceeded a predetermined value. - View Dependent Claims (15, 16, 17)
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18. A multiaccess communication system comprising:
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a common communication path having a multichannel structure; a plurality of nodes each of which is connected to said common communication path for carrying out a data communication using packets between selected ones thereof; wherein at least one of said plurality of nodes includes channel selecting means for switching to a selected channel by exchanging predetermined packets for selecting a data transmitting channel in advance between nodes, between which a data communication is desired, through a dedicated control channel which is commonly allotted to each of said plurality of nodes so as to establish a reception accepting condition at all times whenever said nodes have no session; and
means for resetting a node to said dedicated control channel in response to a session end packet which is supplied at the completion of data communication. - View Dependent Claims (19)
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20. A multiaccess communication system comprising:
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a common communication path having a multichannel structure; a plurality of nodes each of which is connected to said common communication path for carrying out a data communication using packets between selected ones thereof; wherein each of at least some of said plurality of nodes includes a first transmitter/receiver unit dedicated for a dedicated control channel allocated commonly to each of said nodes so as to maintain a reception accepting condition at all times, a plurality of second transmitter/receiver units each of which is dedicated to a corresponding one of a number of data transferring channels for use in data transfer, and means for selecting a data transferring channel by exchanging predetermined packets in advance between nodes, between which a data communication is desired, through said first transmitter/receiver unit dedicated for the control channel to thereby establish a link with the node to which communication is to be made, through one of said plurality of second transmitter/receiver units which corresponds to said selected channel. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A multiaccess communication system comprising:
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a common communication path having a multichannel structure; a plurality of nodes each of which is connected to said common communication path for carrying out a data communication using packets between selected ones thereof; wherein each of at least some of said plurality of nodes includes a first transmitter/receiver unit dedicated for a dedicated control channel allocated commonly to each of said nodes so as to maintain a reception accepting condition at all times, a plurality of second transmitter/receiver units each of which is dedicated to a corresponding one of a number of data transferring channels for use in data transfer, means for selecting a data transferring channel by exchanging predetermined packets in advance between nodes, between which a data communication is desired, through said first transmitter/receiver unit dedicated for the control channel to thereby establish a link with the node to which communication is to be made, through one of said plurality of second transmitter/receiver units which corresponds to said selected channel, and means for detecting an abnormality in data communication in the data transfer channel to which said link has been established and releasing a data transfer mode in the corresponding link. - View Dependent Claims (31)
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32. A multiaccess communication system comprising:
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a common communication path having a multichannel structure; a plurality of nodes each of which is connected to said common communication path for carrying out a data communication using packets between elected ones thereof; wherein each of at least some of said plurality of nodes includes a first transmitter/receiver unit dedicated for a dedicated control channel allocated commonly to each of said nodes so as to maintain a reception accepting condition at all times, a plurality of second transmitter/receiver unites each of which is dedicated to a corresponding one of a number of data transferring channels for use in data transfer, means for selecting a data transferring channel by exchanging predetermined packets in advance between nodes, between which a data communication is desired, through said first transmitter/receiver unit dedicated for the control channel to thereby establish a link with the node to which communication is to be made, through one of said plurality of second transmitter/receiver units which corresponds to said selected channel, and means for releasing a data transfer mode in the corresponding link in response to a session end packet which is supplied upon completion of data communication.
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33. A multiaccess communication system comprising:
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a common communication path having a multichannel structure; a plurality of nodes each of which is connected to said common communication path for carrying out a data communication using packets between selected ones thereof; wherein each of at least some of said plurality of nodes includes a transmitter/receiver unit dedicated to a dedicated control channel allocated commonly to each of said nodes so as to maintain a reception accepting condition at all times, and channel selecting means for switching to a selected channel by exchanging predetermined packets for selecting a data transferring channel in advance between nodes, between which a data communication is desired, through said transmitter/receiver dedicated to the control channel. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A multiaccess communication system comprising:
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a common communication path having a multichannel structure; a plurality of nodes each of which is connected to said common communication path for carrying out a data communication using packets between selected ones thereof; wherein each of at least some of said plurality of nodes includes a transmitter/receiver unit dedicated to a dedicated control channel allocated commonly to each of said nodes so as to maintain a reception accepting condition at all times, channel selecting means for switching to a selected channel by exchanging predetermined packets for selecting a data transferring channel in advance between nodes, between which a data communication is desired, through said transmitter/receiver dedicated to the control channel, and means for releasing a data transfer mode in the corresponding link upon detection of an abnormality in data communication in the selected data transfer channel.
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44. The multiaccess communication system of caim 43 wherein one of said nodes, which has detected an abnormality in data communication, transmits a packet for releasing a data transfer mode in the corresponding link in the opposite node in communication.
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45. A multiaccess communication system comprising:
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a common communication path having a multichannel structure; a plurality of nodes each of which is connected to said common communication path for carrying out a data communication using packets between selected ones thereof; wherein each of at least some of said plurality of nodes includes a transmitter/receiver unit dedicated to a dedicated control channel allocated commonly to each of said nodes so as to maintain a reception accepting condition at all times, channel selecting means for switching to a selected channel by exchanging predetermined packets for selecting a data transferring channel in advance between nodes, between which a data communication is desired, through said transmitter/receiver dedicated to the control channel, and means for releasing a data transfer mode in the corresponding link in response to a session end packet which is supplied upon completion of data communication.
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Specification