US3739102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitter receiver for radio telephone network
Assignee: Alcatel CIT SA
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Filing: 1971-05-28
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Granted: 1973-06-12
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Expires: 1991-05-28
Abstract
Abstract Device ensuring the selection of a fixed connection extension located so as to provide a good quality connection exclusive of other fixed extensions which are not so favorably located. The intended application is the connection between a mobile extension and a fixed extension supplied by the said connection extension.
Inventors
- 👤 D Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:19
CPC Classifications
H; H04; H04W; H04W76/00; H04W76/10; H04W48/00; H04W48/08; H04W72/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
130 words
A transmitter-receiver for a radio-telephone network linked to a wired telephone network through apparatus including concentrators each arranged to broadcast a general call code over successive free channels of a set of channels, the general call code being identified by a transmitter-receiver of the network wishing to make a call as indicating an available channel, the transmitter-receiver including a concentrator selection system comprising comparator means for comparing successively received general call codes for an initially selected concentrator, first means responsive to non-coincidence of a preselected sequential number of such codes for initiating at least one further concentrator selection cycle, until such time as coincidence is obtained, and second means for storing the corresponding call code only in response to repeated coincidence of sequentially received codes to select the concentrator concerned.
Claim 2
Dependent Claim
130 words
A transmitter-receiver for a radio-telephone network linked to a wired telephone network through apparatus including concentrators each arranged to broadcast a general call code over successive free channels of a set of channels, the general call code being identified by a transmitter-receiver of the network wishing to make a call as indicating an available channel, the transmitter-receiver including a concentrator selection system comprising comparator means for comparing successively received general call codes for an initially selected concentrator, first means responsive to non-coincidence of a preselected sequential number of such codes for initiating at least one further concentrator selection cycle, until such time as coincidence is obtained, and second means for storing the corresponding call code only in response to repeated coincidence of sequentially received codes to select the concentrator concerned.
Claim 3
Dependent Claim
97 words
A transmitter-receiver as claimed in claim 1, in which said comparator means includes a first memory connected to receive and hold a first-received general call code, a second memory connected to receive and hold one at a time a predetermined number of succeeding general call codes, coincidence circuit means connected to said first and second memories for indicating coincidence of the contents of the first and second memories, and a majority decision circuit connected to the output of said coincidence circuit means to count such coincidences and indicate when a predetermined number of coincidences has been detected.
Claim 4
Dependent Claim
156 words
A transmitter-receiver as claimed in claim 1, wherein said first means, includes a circuit providing an advance pulse each time a change in channel occurs, these pulses being applied to the input of a divider for dividing said advance pulse by N, where N is the number of channels, the output of said divider being connected to the input of a second divider which divides the divider outputs by a division factor q, the output of said second divider being connected to circuitry which is held in a first state to permit adoption of an initially selected concentrator and which is switched to a second state by the output of said divider, so that if the predetermined number of coincidences is not obtained after q sweeps of the N channels, the initially selected concentrator is discarded, said second divider being reset to zero by said majority decision circuit when the predetermined number of coincidences is obtained.
Claim 5
Dependent Claim
32 words
A transmitter-receiver as claimed in claim 1, wherein said comparator means includes sequence control means responsive to sequentially received general call codes for storing and repetitively comparing said codes with each other.
Claim 6
Dependent Claim
97 words
A transmitter-receiver as claimed in claim 4, in which said comparator means includes a first memory connected to receive and hold a first-received general call code, a second memory connected to receive and hold one at a time a predetermined number of succeeding general call codes, coincidence circuit means connected to said first and second memories for indicating coincidence of the contents of the first and second memories, and a majority decision circuit connected to the output of said coincidence circuit means to count such coincidences and indicate when a predetermined number of coincidences has been detected.
Claim 7
Dependent Claim
156 words
A transmitter-receiver as claimed in claim 5, wherein said first means, includes a circuit providing an advance pulse each time a change in channel occurs, these pulses being applied to the input of a divider for dividing said advance pulse by N, where N is the number of channels, the output of said divider being connected to the input of a second divider which Divides the divider outputs by a division factor q, the output of said second divider being connected to circuitry which is held in a first state to permit adoption of an initially selected concentrator and which is switched to a second state by the output of said divider, so that if the predetermined number of coincidences is not obtained after q sweeps of the N channels, the initially selected concentrator is discarded, said second divider being reset to zero by said majority decision circuit when the predetermined number of coincidences is obtained.
Claim 8
Dependent Claim
97 words
A transmitter-receiver as claimed in claim 3, in which said comparator means includes a first memory connected to receive and hold a first-received general call code, a second memory connected to receive and hold one at a time a predetermined number of succeeding general call codes, coincidence circuit means connected to said first and second memories for indicating coincidence of the contents of the first and second memories, and a majority decision circuit connected to the output of said coincidence circuit means to count such coincidences and indicate when a predetermined number of coincidences has been detected.
Claim 9
Dependent Claim
75 words
A transmitter-receiver as claimed in claim 1, wherein said comparator means includes first and second memories, a comparator connected to said first and second memories for comparing the contents thereof, and sequence control means responsive to sequentially received general call codes for storing a first received code in said first memory and subsequently received codes sequentially in said second memory, the output of said comparator indicating the coincidence between the codes stored in said memories.
Claim 10
Dependent Claim
156 words
A transmitter-receiver as claimed in claim 8, wherein said first means, includes a circuit providing an advance pulse each time a change in channel occurs, these pulses being applied to the input of a divider for dividing said advance pulse by N, where N is the number of channels, the output of said divider being connected to the input of a second divider which divides the divider outputs by a division factor q, the output of said second divider being connected to circuitry which is held in a first state to permit adoption of an initially selected concentrator and which is switched to a second state by the output of said divider, so that if the predetermined number of coincidences is not obtained after q sweeps of the N channels, the initially selected concentrator is discarded, said second divider being reset to zero by said majority decision circuit when the predetermined number of coincidences is obtained.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |