Multiaccess communications system
First Claim
1. A multiaccess communications system for a communications network in which a plurality of nodes are connected to a head end by a common multichannel transmission path to perform wideband transmission of packets between the nodes, comprising:
- (a) means for selectively causing each of the plurality of nodes to select an unoccupied one of a plurality of first channels of said transmission path to send a packet toward the head end over the selected unoccupied channel;
(b) means in the head end for temporarily storing the packets received over the first channels and for sequentially transmitting the packets in the order of completion of the storage toward the plurality of nodes over a second channel, the second channel having line speed which is substantially equal to the product of the line speed of the first channels and the number of the first channels; and
(c) wherein each of the plurality of nodes comprises means for fetching from the second channel a packet which is meant therefor.
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Accused Products
Abstract
A multiaccess communications system for a communications network in which a plurality of nodes are connected to a head end by a common transmission path to perform wideband transmission of packets between the nodes, particularly a multiaccess communications system such as a carrier sensing multiaccess (CSMA) system or a collision sensing CSMA (CSMA/CD) system. A single transmission cable or a pair of transmission cables are efficiently shared by various channels. Each of the nodes is provided with a transceiver in association with the cable or the cables. All the channels are effectively utilized by means of a relatively simple system construction.
15 Citations
20 Claims
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1. A multiaccess communications system for a communications network in which a plurality of nodes are connected to a head end by a common multichannel transmission path to perform wideband transmission of packets between the nodes, comprising:
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(a) means for selectively causing each of the plurality of nodes to select an unoccupied one of a plurality of first channels of said transmission path to send a packet toward the head end over the selected unoccupied channel; (b) means in the head end for temporarily storing the packets received over the first channels and for sequentially transmitting the packets in the order of completion of the storage toward the plurality of nodes over a second channel, the second channel having line speed which is substantially equal to the product of the line speed of the first channels and the number of the first channels; and (c) wherein each of the plurality of nodes comprises means for fetching from the second channel a packet which is meant therefor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A multiaccess communications system comprising:
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a plurality of nodes, a head end and a multichannel transmission path connecting the nodes and the head end for wideband transmission of packets therebetween; means for selectively causing a node to select an unoccupied one of a plurality of first channels of said transmission path to send to the head end, over the selected unoccupied channel, a packet addressed to another selected node; means for causing the head to temporarily store packets received over the first channels and to sequentially transmit stored packets to the nodes over a second channel of said transmission path, in the order of completion of the storage; wherein the line speed of the second channel is substantially equal to the sum of the line speeds of the first channels; and wherein each node comprises means for fetching from the second channel packets addressed thereto. - View Dependent Claims (17, 18, 19, 20)
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Specification