Patent US3836974A successfully refreshed from Google Patents.
US3836974A
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Transmitter sequencing method and apparatus
Assignee: Lockheed Martin Corp
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Filing: 1971-10-25
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Granted: 1974-09-17
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Expires: 1991-10-25
Abstract
Abstract A plural transmitter, digital data transmission and remote control system in the environment of a paging system in which mutual interference by the transmitters is eliminated through the sequencing thereof. Embodiments compatible with existing tone systems are disclosed for both plural system-single area operation and for plural system-plural area operation.
Inventors
- 👤 J Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:07
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02; H04W84/022; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
129 words
A method of transmitting radio paging signals comprising the steps of: a. providing a plurality of transmitters spaced throughout a paging area; b. providing a paging signal including a plurality of subscriber address signals, at least some of the plurality of subscriber address signals designating different subscribers; c. transmitting the paging signal including the plurality of subscriber address signals from a first one of the plurality of transmitters in a first time slot; and, d. transmitting the same paging signal from a second one of the plurality of transmitters in a second time slot, the first one of the plurality of transmitters being inoperative to transmit during the second time slot and the second one of the plurality of transmitters being inoperative to transmit during the first time slot.
Claim 2
Independent Claim
129 words
A method of transmitting radio paging signals comprising the steps of: a. providing a plurality of transmitters spaced throughout a paging area; b. providing a paging signal including a plurality of subscriber address signals, at least some of the plurality of subscriber address signals designating different subscribers; c. transmitting the paging signal including the plurality of subscriber address signals from a first one of the plurality of transmitters in a first time slot; and, d. transmitting the same paging signal from a second one of the plurality of transmitters in a second time slot, the first one of the plurality of transmitters being inoperative to transmit during the second time slot and the second one of the plurality of transmitters being inoperative to transmit during the first time slot.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the same paging signal is transmitted by a plurality of transmitters in at least one of the time slots.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein the same paging signal is transmitted by a plurality of transmitters in each of the time slots.
Claim 5
Independent Claim
123 words
A method for transmitting a data signal comprising the steps of: a. providing a plurality of electromagnetic wave energy transmitters in a predetermined geographical area, the transmitters being spaced throughout the geographical area for substantial coverage of the geographical area by the combined propagation patterns of the transmitters; b. compiling a digital data signal comprising a plurality of plural binary bit, digital address signals; c. sequentially transmitting the same digital data signal from each of the transmitters in accordance with a predetermined sequence the sequence being such that immediately adjacent ones of the transmitters do not simultaneously transmit whereby the data signal can be received essentially throughout the predetermined geographical area at least once during the sequence without mutual interference by the transmitters.
Claim 6
Independent Claim
123 words
A method for transmitting a data signal comprising the steps of: a. providing a plurality of electromagnetic wave energy transmitters in a predetermined geographical area, the transmitters being spaced throughout the geographical area for substantial coverage of the geographical area by the combined propagation patterns of the transmitters; b. compiling a digital data signal comprising a plurality of plural binary bit, digital address signals; c. sequentially transmitting the same digital data signal from each of the transmitters in accordance with a predetermined sequence the sequence being such that immediately adjacent ones of the transmitters do not simultaneously transmit whereby the data signal can be received essentially throughout the predetermined geographical area at least once during the sequence without mutual interference by the transmitters.
Claim 7
Independent Claim
140 words
A method of transmitting a signal throughout a predetermined geographical area exceeding in area the propagation pattern of a single transmitter comprising the steps of: a. providing a plurality of transmitters at spaced positions throughout a predetermined geographical area exceeding in area the propagation pattern of any one of the transmitters; b. providing a first digitally encoded data signal including a plurality of different receiver address codes; and, c. successively transmitting the first digitally encoded data signal including the plurality of different receiver address codes from each of the plurality of transmitters in a different time slot in a major data frame, each of the plurality of transmitters being inoperative to transmit during at least one entire time slot of the major frame, whereby the first digitally encoded data signal can be propagated throughout the geographical area without transmitter interference.
Claim 8
Independent Claim
140 words
A method of transmitting a signal throughout a predetermined geographical area exceeding in area the propagation pattern of a single transmitter comprising the steps of: a. providing a plurality of transmitters at spaced positions throughout a predetermined geographical area exceeding in area the propagation pattern of any one of the transmitters; b. providing a first digitally encoded data signal including a plurality of different receiver address codes; and, c. successively transmitting the first digitally encoded data signal including the plurality of different receiver address codes from each of the plurality of transmitters in a different time slot in a major data frame, each of the plurality of transmitters being inoperative to transmit during at least one entire time slot of the major frame, whereby the first digitally encoded data signal can be propagated throughout the geographical area without transmitter interference.
Claim 9
Dependent Claim
44 words
The method of claim 5 including the further steps of providing a second digitally encoded data signal, and successively transmitting the second digitally encoded data signal from each of the plurality of transmitters In a different time slot in a second major data frame.
Claim 10
Dependent Claim
150 words
Apparatus for transmitting a data signal comprising: a plurality of transmitters operable at only one carrier frequency and having overlapping propagation patterns; means for generating a plurality of plural binary bit, digital data signals each including a plurality of different address words; and, means responsive to said generating means for selectively operating said plurality of transmitters to effect the transmission of a first one of said plurality of generated digital data signals from each of said plurality of transmitters such that the transmission of said first one of said digital data signals by transmitters having overlapping propagation patterns is mutually exclusive so that the message word is not simultaneously transmitted from immediately adjacent ones of said plurality of transmitters, said operating means thereafter selectively operating said plurality of transmitters to effect the transmission of a second one of said plurality of generated digital data signals by each of said transmitters.
Claim 11
Dependent Claim
150 words
Apparatus for transmitting a data signal comprising: a plurality of transmitters operable at only one carrier frequency and having overlapping propagation patterns; means for generating a plurality of plural binary bit, digital data signals each including a plurality of different address words; and, means responsive to said generating means for selectively operating said plurality of transmitters to effect the transmission of a first one of said plurality of generated digital data signals from each of said plurality of transmitters such that the transmission of said first one of said digital data signals by transmitters having overlapping propagation patterns is mutually exclusive so that the message word is not simultaneously transmitted from immediately adjacent ones of said plurality of transmitters, said operating means thereafter selectively operating said plurality of transmitters to effect the transmission of a second one of said plurality of generated digital data signals by each of said transmitters.
Claim 12
Dependent Claim
34 words
The apparatus of claim 7 wherein said operating means effects the transmission of said second data signal such that transmission of said second data signal by transmitters having overlapping propagation patterns is mutually exclusive.
Claim 13
Dependent Claim
141 words
Apparatus for paging a subscriber comprising: a plurality of transmitters spaced throughout a paging area; means for generating a paging signal including a plurality of subscriber address signals; and, means responsive to said paging signal generating means and cooperable with said plurality of transmitters for selectively operating said transmitters to effect the transmission of said paging signal from at least one of said plurality of transmitters in a first time slot and to effect the transmission of said paging signal from at least one of said plurality of transmitters in a second time slot; said at least one of the transmitters transmitting in said first time slot being different from said at least one of the transmitters transmitting in said second time slot and being rendered inoperative by said operating means to transmit said paging signal in said second time slot.
Claim 14
Dependent Claim
141 words
Apparatus for paging a subscriber comprising: a plurality of transmitters spaced throughout a paging area; means for generating a paging signal including a plurality of subscriber address signals; and, means responsive to said paging signal generating means and cooperable with said plurality of transmitters for selectively operating said transmitters to effect the transmission of said paging signal from at least one of said plurality of transmitters in a first time slot and to effect the transmission of said paging signal from at least one of said plurality of transmitters in a second time slot; said at least one of the transmitters transmitting in said first time slot being different from said at least one of the transmitters transmitting in said second time slot and being rendered inoperative by said operating means to transmit said paging signal in said second time slot.
Claim 15
Dependent Claim
45 words
The apparatus of claim 9 wherein said paging signal is transmitted by a plurality of transmitters in each of said time slots, all of the transmitters transmitting in said first time slot being different from all of the transmitters transmitting in said second time slot.
Claim 16
Dependent Claim
19 words
The apparatus of claim 10 wherein all of said plurality of transmitters transmit at substantially the same carrier frequency.
Claim 17
Dependent Claim
133 words
Apparatus for transmitting a digital radio paging signal comprising: a first fixed frequency transmitter operable to transmit at only one predetermined carrier frequency; a second fixed frequency transmitter spaced from said first transmitter and operable to transmit at only said predetermined carrier frequency; means for generating a digital paging signal including a plurality of digital address signals, at least some of said digital address signals identifying different individual subscribers; and, means for sequentially applying said digital paging signal to each of said first and second transmitters to effect the transmission of said digital paging signal at said predetermined carrier frequency, the sequential application of said digital paging signal to said transmitters being mutually exclusive so that only one of said first and second transmitters is transmitting said digital paging signal at any instant.
Claim 18
Dependent Claim
133 words
Apparatus for transmitting a digital radio paging signal comprising: a first fixed frequency transmitter operable to transmit at only one predetermined carrier frequency; a second fixed frequency transmitter spaced from said first transmitter and operable to transmit at only said predetermined carrier frequency; means for generating a digital paging signal including a plurality of digital address signals, at least some of said digital address signals identifying different individual subscribers; and, means for sequentially applying said digital paging signal to each of said first and second transmitters to effect the transmission of said digital paging signal at said predetermined carrier frequency, the sequential application of said digital paging signal to said transmitters being mutually exclusive so that only one of said first and second transmitters is transmitting said digital paging signal at any instant.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |