Multiplex transmission system
First Claim
1. A time division multiplexed transmission system comprising:
- a plurality of nodes each respectively connected to control one of a plurality of units of electrical equipment; and
a signal transmission path for connecting said nodes in a continuous signal communication loop, in which;
each of said nodes comprises;
time base measuring means adapted to repetitively measure a time base during which a signal of a unit length at least longer than 2 bits is transmitted to said signal transmission path from one of the nodes;
transmitting means connected to said signal transmission path for transmitting a prepared signal no shorter than said unit length over said signal transmission path;
receiving means connected to receive said prepared signal from said signal transmission path;
controlling means operatively connected to control said transmitting means and said receiving means and connected to control a corresponding one of said units of electrical equipment; and
each of said nodes being adapted to start to perform signal transmission to said signal transmission path in a predetermined order, wherein;
each of said nodes further comprises means adapted, whenever having received said prepared signal from any other node than itselft, for resetting said time base measuring means to thereby make said time base synchronized with that of said any other node.
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Accused Products
Abstract
A multiplex transmission system (100) in which any (Ni) of a plurality of nodes (Nl -Nn) connected loop-like with a signal transmission path (1a, 1b) and each respectively connected to, for controlling, one of a plurality of electrical equipments is adapted for transmitting, in a given order (i) and in accordance with a time base (1/2t1) that this node (Ni) itself has, a prepared signal (Ai, D) to the signal transmission path (1a, 1b) and for receiving prepared signal (Ai, D; Ax, D) from the signal transmission path (1a, 1b), wherein any (Ni) of the nodes (Nl -Nn) is adapted, at a time point (r2, r3) where this node (Ni) has received the prepared signal (Ax, D) from any other node (Nx) to have its own time base (1/2t1) synchronized with the time base (1/2t1) of the other node (Nx).
Any (Ni) of the nodes (Nl -Nn) further comprises a monitoring timer (CNT2) adapted to have a monitoring time interval (t2, ti3, ti4) set thereon at a predetermined time point (59, 62, 71, 84, 88), and is adapted to rise for transmitting the prepared signal (Ai, D) thereof to the signal transmission path (1a, 1b) when the monitoring timer (CNT2) has timed up.
20 Citations
12 Claims
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1. A time division multiplexed transmission system comprising:
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a plurality of nodes each respectively connected to control one of a plurality of units of electrical equipment; and a signal transmission path for connecting said nodes in a continuous signal communication loop, in which; each of said nodes comprises; time base measuring means adapted to repetitively measure a time base during which a signal of a unit length at least longer than 2 bits is transmitted to said signal transmission path from one of the nodes; transmitting means connected to said signal transmission path for transmitting a prepared signal no shorter than said unit length over said signal transmission path; receiving means connected to receive said prepared signal from said signal transmission path; controlling means operatively connected to control said transmitting means and said receiving means and connected to control a corresponding one of said units of electrical equipment; and each of said nodes being adapted to start to perform signal transmission to said signal transmission path in a predetermined order, wherein; each of said nodes further comprises means adapted, whenever having received said prepared signal from any other node than itselft, for resetting said time base measuring means to thereby make said time base synchronized with that of said any other node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A time division multiplexed transimssion system comprising:
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a plurality of nodes each respectively connected to control one of a plurality of units of electrical equipment; and a signal transmission path for connecting said nodes in a continuous communication loop from a transmitting node to the other nodes and back to the transmitting node, in which; at least one of said nodes comprises; transmitting means connected to said signal transmission path for transmitting a prepared signal over said signal transmission path; receiving means connected to said signal transmission path for receiving said prepared signal from said transmission path; time base measuring means adapted to repetitively measure a time base having a duration of at least two transmission bit times and generate in response thereto a timing control signal indicating signal transmission intervals for said transmitting means; controlling means operatively connected to receive said timing control signal and to control said transmitting means in response to said timing control signal and to control said receiving means and connected to control as associated one of said units of electrical equipment; and said at least one of said nodes is adapted to perform signal transmission to said signal transmission path in a predetermined order, wherein; said at least one of said nodes further comprises means adapted, when having received said prepared signal from any other node than itself, for resetting said time base measuring means to thereby synchronize said time base with a time base of another of said at least one node.
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12. A time division multiplexed transmission system comprising:
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a signal transmission path connecting a plurality of nodes in a continuous closed loop from a transmitting node back to the transmitting node; said plurality of nodes, each connected to control a differenct associated unit of electrical equipment and including, a transmitter connected to transmit a multibit prepared signal onto the signal transmission path; a receiver connected to receive the prepared signal from the signal transmission path; a timer repetitively measuring a time base interval having a duration of a least two transmission bit times and generating in response thereto a timing control signal indicating signal transmission time intervals for the transmitter; a controller connected to receive the timing control signal and to control the transmitter in response thereto and in a predetermined order of transmission among the plurality of nodes, to control the receiver and to control the associated unit of electrical equipments; and a synchronizing ciruit coupled to reset the timer in response to receipt by the receiver of a prepared signal transmitted by a different one of the plurality of nodes to thereby synchronize the time base of the node with a time base of said different one of the plurality of nodes.
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Specification