US5319635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic duplex communication system
Assignee: Motorola Solutions Inc
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Filing: 1992-12-07
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Granted: 1994-06-07
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Expires: 2012-12-07
Abstract
Abstract A communication unit (10) transmits a first signal (12) that has a plurality of holes (44) therein during the occurrence of which another communication unit may interrupt. A repeater (14) receives the first signal and transmits a second signal (16) comprising the information in the first signal, and a plurality of digital coded squelch words synchronized with the holes to indicate the location of at least one of the holes in the first signal (i.e., the time at which at least one of the holes will occur). In one embodiment, each hole occurs after each pair of coded squelch words, and accordingly the pairs of coded squelch words are marked to indicate the times of occurrence of holes in the first signal.
Inventors
- 👤 John D. Reed
- 👤 Walter J. Rozanski, Jr.
- 👤 Charles N. Lynk, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:20
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54; H04B1/56; H04L; H04L5/00; H04L5/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
136 words
In a communication system capable of providing communication between quasi-duplex communication units and simplex communication units through a repeater, a method comprising the steps of: in the quasi-duplex communication unit: (a) transmitting a first signal having a plurality of holes therein, the first signal comprising an audio-modulated portion, a data portion, the data portion including data indicating the time at which at least one of the plurality of holes will occur in the first signal; in the repeater: (b) receiving the first signal; (c) transmitting a second signal comprising: an audio-modulated signal representing the audio-modulated portion of the first signal; and a coded squelch signal synchronized with the holes in the first signal for providing hole timing information to other quasi-duplex communication units, said coded squelch signals being also capable of unsquelching the simplex communication units.
Claim 2
Dependent Claim
136 words
In a communication system capable of providing communication between quasi-duplex communication units and simplex communication units through a repeater, a method comprising the steps of: in the quasi-duplex communication unit: (a) transmitting a first signal having a plurality of holes therein, the first signal comprising an audio-modulated portion, a data portion, the data portion including data indicating the time at which at least one of the plurality of holes will occur in the first signal; in the repeater: (b) receiving the first signal; (c) transmitting a second signal comprising: an audio-modulated signal representing the audio-modulated portion of the first signal; and a coded squelch signal synchronized with the holes in the first signal for providing hole timing information to other quasi-duplex communication units, said coded squelch signals being also capable of unsquelching the simplex communication units.
Claim 3
Dependent Claim
15 words
The method of claim 1, wherein the coded squelch signal comprises a digital coded signal.
Claim 4
Dependent Claim
47 words
The method of claim 2, wherein the coded squelch signal comprises at least one pair of digital private line signals being positioned immediately adjacent each other, wherein hole timing information is provided upon detection, by the quasi-duplex communication units, of one of the digital private line signals.
Claim 5
Dependent Claim
21 words
The method of claim 1, wherein said coded squelch signal has at least one marker for providing the hole timing information.
Claim 6
Dependent Claim
18 words
The method of claim 4, wherein said marker is positioned within a pair of digital private line signals.
Claim 7
Dependent Claim
23 words
The method of claim 5, wherein the marker comprises two alternating bits replacing a bit in one of the digital private line signals.
Claim 8
Dependent Claim
181 words
A communication device capable of communicating with a plurality of quasi-duplex communication units and a plurality of simplex communication units operating within a communication system, comprising: receiver means comprising means for receiving a first signal from the quasi-duplex communication unit, the first signal comprising a plurality of holes therein, and a data portion, the data portion comprising data indicating the time at which at least one of the plurality of holes will occur; decoder means for decoding the data portion received by the receiver means to determine the time at which at least one of the holes will occur in the signal having a plurality of holes; transmitter means coupled to the reciever means for transmitting a second signal representing the first signal, the second signal comprising a coded squelch signal synchronized with the plurality of holes in the first signal for providing hole timing information to other quasi-duplex communication units, the coded squelch signal being capable of unsquelching at least one of the simplex communication units; and encoder means, coupled to the transmitter means, for producing the coded squelch signal.
Claim 9
Dependent Claim
181 words
A communication device capable of communicating with a plurality of quasi-duplex communication units and a plurality of simplex communication units operating within a communication system, comprising: receiver means comprising means for receiving a first signal from the quasi-duplex communication unit, the first signal comprising a plurality of holes therein, and a data portion, the data portion comprising data indicating the time at which at least one of the plurality of holes will occur; decoder means for decoding the data portion received by the receiver means to determine the time at which at least one of the holes will occur in the signal having a plurality of holes; transmitter means coupled to the reciever means for transmitting a second signal representing the first signal, the second signal comprising a coded squelch signal synchronized with the plurality of holes in the first signal for providing hole timing information to other quasi-duplex communication units, the coded squelch signal being capable of unsquelching at least one of the simplex communication units; and encoder means, coupled to the transmitter means, for producing the coded squelch signal.
Claim 10
Dependent Claim
16 words
The communication device of claim 7, wherein the coded squelch signal comprises a digital coded signal.
Claim 11
Dependent Claim
48 words
The communication device of claim 8, wherein the coded squelch signal comprises at least one pair of digital private line signals being positioned immediately adjacent each other, wherein hole timing information is provided upon detection, by the quasi-duplex communication units, of one of the digital private line signals.
Claim 12
Dependent Claim
22 words
The communication device of claim 7, wherein said coded squelch signal has at least one marker for providing the hole timing information.
Claim 13
Dependent Claim
19 words
The communication device of claim 10, wherein said marker is positioned within a pair of digital private line signals.
Claim 14
Dependent Claim
24 words
The communication device of claim 10, wherein the marker comprises two alternating bits replacing a bit in one of the digital private line signals.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-06 | 1997-12-06 | 1998-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-06 | 2001-12-06 | 2002-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-06 | 2005-12-06 | 2006-06-07 | $7700.00 | Window Closed / Lapsed |