EP0260696A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Subsidiary station capable of automatically adjusting an internal delay in response to a number signal received in a downward signal by the subsidiary station
Assignee: NEC Corp
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Filing: 1987-09-17
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Granted: —
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Expires: 2007-09-17
Abstract
Abstract In a repeater station (20) for receiving a first downward signal from a next preceding station (21) with a propagation delay and for transmitting a second downward signal to a next succeeding station, a first delay circuit (15) gives a fixed delay to the first downward signal to produce a delayed signal for use as the second downward signal. The first downward signal has a frame period and includes a reference signal and a number signal representative of an integer for the repeater station. The fixed delay is rendered equal to an integral submultiple of the frame period minus the propagation delay. A first detector (17) detects the reference signal to produce a first detection signal. A second detector (23) detects the number signal to produce a second detection signal representative of the integer. Responsive to the second detection signal, an internal delay circuit (24) gives an internal delay to the first detection signal to produce a delayed detection signal. The internal delay is decided in consideration of the integer. Responsive to the delayed detection signal, a multiplexer (25) processes a first upward signal received from the succeeding station into a processed signal. A second delay circuit (26) gives the fixed delay to the processes signal to produce a second upward signal which should be received by the preceding station with the propagation delay. The repeater station may be used as a terminal station.
Inventors
- 👤 Norio C/O Nec Corporation Itoh
- 👤 Masayuki C/O Nec Corporation Ohtawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 04:11
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/062; H04J3/0626; H04B; H04B7/00; H04B7/24; H04J3/0635; H04J3/0682
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
304 words
In a repeater station for receiving a first downward signal from a next preceding station with a propagation delay, for transmitting a second downward signal to a next succeeding station, for receiving a first upward signal from said succeeding station, and for transmitting to said preceding station a second upward signal which should be received by said preceding station with said propagation delay, each of said first and said second downward signals having a frame period and including a reference signal, each of said first and said second upward signals having a frame period, said repeater station including a first delay circuit for giving a fixed delay to said first downward signal to produce a delayed signal for use as said second downward signal, and a first detector for detecting the reference signal of said first downward signal to produce a first detection signal, the improvement wherein: said fixed delay is rendered equal to an integral submultiple of said frame period minus said propagation delay; said first downward signal including a number signal representative of an integer corresponding in number to at least one another station through which said first downward signal is received from an originating station, said at least one other station comprising said preceding station; said repeater station comprising: a second detector for detecting said number signal to produce a second detection signal representative of said integer; an internal delay circuit responsive to said second detection signal for giving an internal delay to said first detection signal to produce a delayed detection signal, said internal delay being decided in consideration of said integer; processing means responsive to said delayed detection signal for processing said first upward signal into a processed signal; and a second delay circuit for giving said fixed delay to said processed signal to produce said second upward signal.
Claim 2
Dependent Claim
304 words
In a repeater station for receiving a first downward signal from a next preceding station with a propagation delay, for transmitting a second downward signal to a next succeeding station, for receiving a first upward signal from said succeeding station, and for transmitting to said preceding station a second upward signal which should be received by said preceding station with said propagation delay, each of said first and said second downward signals having a frame period and including a reference signal, each of said first and said second upward signals having a frame period, said repeater station including a first delay circuit for giving a fixed delay to said first downward signal to produce a delayed signal for use as said second downward signal, and a first detector for detecting the reference signal of said first downward signal to produce a first detection signal, the improvement wherein: said fixed delay is rendered equal to an integral submultiple of said frame period minus said propagation delay; said first downward signal including a number signal representative of an integer corresponding in number to at least one another station through which said first downward signal is received from an originating station, said at least one other station comprising said preceding station; said repeater station comprising: a second detector for detecting said number signal to produce a second detection signal representative of said integer; an internal delay circuit responsive to said second detection signal for giving an internal delay to said first detection signal to produce a delayed detection signal, said internal delay being decided in consideration of said integer; processing means responsive to said delayed detection signal for processing said first upward signal into a processed signal; and a second delay circuit for giving said fixed delay to said processed signal to produce said second upward signal.
Claim 3
Dependent Claim
63 words
A repeater station as claimed in Claim 1, further comprising: first modifying means for modifying said number signal into a modified signal representative of another integer for said succeeding station; and second modifying means responsive to said modified signal for modifying said delayed signal into said second downward signal with said modified signal substituted for the number signal included in said delayed signal.
Claim 4
Dependent Claim
242 words
In a terminal station for receiving a downward signal from a next preceding station with a propagation delay and for transmitting to said preceding station an upward signal which should be received by said preceding station with said propagation delay, said downward signal having a frame period and including a reference signal, said upward signal having said frame period, said terminal station including a first delay circuit for giving a fixed delay to said downward signal to produce a delayed signal, and a first detector for detecting said reference signal to produce a first detection signal, the improvement wherein: said fixed delay is rendered equal to an integral submultiple of said frame period minus said propagation delay; said downward signal including a number signal representative of an integer corresponding in number to at least one repeater station through which said downward signal is received from an originating station; said terminal station comprising: a second detector for detecting said number signal to produce a second detection signal representative of said integer; an internal delay circuit responsive to said second detection signal for giving an internal delay to said first detection signal to produce a delayed detection signal, said internal delay being decided in consideration of said integer; a second delay circuit for giving said fixed delay to a processed signal to produce said upward signal; and processing means responsive to said delayed detection signal for processing an input signal into said processed signal.
Claim 5
Dependent Claim
242 words
In a terminal station for receiving a downward signal from a next preceding station with a propagation delay and for transmitting to said preceding station an upward signal which should be received by said preceding station with said propagation delay, said downward signal having a frame period and including a reference signal, said upward signal having said frame period, said terminal station including a first delay circuit for giving a fixed delay to said downward signal to produce a delayed signal, and a first detector for detecting said reference signal to produce a first detection signal, the improvement wherein: said fixed delay is rendered equal to an integral submultiple of said frame period minus said propagation delay; said downward signal including a number signal representative of an integer corresponding in number to at least one repeater station through which said downward signal is received from an originating station; said terminal station comprising: a second detector for detecting said number signal to produce a second detection signal representative of said integer; an internal delay circuit responsive to said second detection signal for giving an internal delay to said first detection signal to produce a delayed detection signal, said internal delay being decided in consideration of said integer; a second delay circuit for giving said fixed delay to a processed signal to produce said upward signal; and processing means responsive to said delayed detection signal for processing an input signal into said processed signal.
References Cited (Backward Citations)
No citation records indexed.
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