US4554677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Queued community repeater controller
Assignee: Motorola Solutions Inc
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Filing: 1983-12-22
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Granted: 1985-11-19
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Expires: 2003-12-22
Abstract
Abstract A communications system central controller which regulates the access of a plurality of remote units to a single communications channel is disclosed. The central controller establishes a period of time wherein a remote unit may request service following the transmission of another remote unit. The central controller interprets the remote unit request for service, stores the request, and grants permission for the remote unit to transmit its message in accordance with the priority in the storage means. The grant of service is revoked by the central controller after a predetermined period of time following the conclusion of the remote unit transmission.
Inventors
- 👤 Paul F. Smith
- 👤 Eric Schorman
- 👤 Timothy M. Burke
- 👤 Charles N. Lynk, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:28
CPC Classifications
H; H04; H04W; H04W84/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
210 words
A central controller for a single channel communications system regulating access by a plurality of remote units to the single channel, each remote unit associated with one of a plurality of predetermined groups of remote units and each remote unit adapted to request service on the channel and, after permission is granted, to transmit a message on the channel, comprising: means for detecting an end-of-transmission condition of a first remote unit of a first group; means, responsive to said end-of-transmission condition detection, for establishing a period of time on the single communications channel during which a remote unit of a second group may request service; means for processing a received second group remote unit request for service; storage means for storing said processed remote unit request in a queue with other remote unit requests; means for maintaining a grant of service to said first group following said period of time whereby a second remote unit of said first group may transmit; means for revoking said first group grant of service if said second remote unit does not transmit; and means for granting said request for service of said second group remote unit in accordance with a priority in said storage means when said first group grant of service is revoked.
Claim 2
Dependent Claim
210 words
A central controller for a single channel communications system regulating access by a plurality of remote units to the single channel, each remote unit associated with one of a plurality of predetermined groups of remote units and each remote unit adapted to request service on the channel and, after permission is granted, to transmit a message on the channel, comprising: means for detecting an end-of-transmission condition of a first remote unit of a first group; means, responsive to said end-of-transmission condition detection, for establishing a period of time on the single communications channel during which a remote unit of a second group may request service; means for processing a received second group remote unit request for service; storage means for storing said processed remote unit request in a queue with other remote unit requests; means for maintaining a grant of service to said first group following said period of time whereby a second remote unit of said first group may transmit; means for revoking said first group grant of service if said second remote unit does not transmit; and means for granting said request for service of said second group remote unit in accordance with a priority in said storage means when said first group grant of service is revoked.
Claim 3
Dependent Claim
46 words
A central controller in accordance with claim 1 wherein said period of time establishing means further comprises means for reducing contention between requesting remote units by intermittently causing remote units to randomly select one of two response windows in which to transmit a request for service.
Claim 4
Dependent Claim
44 words
A central controller in accordance with claim 1 wherein said central controller further comprises means for generating a signal for transmission to said remote units which indicates the commencement of said established period of time and acknowledges a previous remote unit request for service.
Claim 5
Dependent Claim
31 words
A central controller in accordance with claim 1 wherein said granting means further comprises means for recalling remote unit requests for service from said storage means on a first-in first-out priority.
Claim 6
Dependent Claim
53 words
A central controller in accordance with claim 1 wherein said granting means further comprises means for authorizing reception by said second group of remote units subsequent to said second group grant of service whereby said second group of remote units will be activated to receive transmission by said requesting second group remote unit.
Claim 7
Dependent Claim
44 words
A central controller in accordance with claim 1 wherein said central controller further comprises first timing means for timing remote unit activity on said channel in order to revoke said grant of service if said channel is unused for a predetermined period of time.
Claim 8
Dependent Claim
47 words
A central controller in accordance with claim 6 wherein said central controller further comprises second timing means for timing the duration of remote unit transmission on said channel in order that said grant of service may be revoked after the expiration of a predetermined period of time.
Claim 9
Dependent Claim
36 words
A central controller in accordance with claim 1 wherein said central controller further comprises means for immediately granting service to a requesting remote unit when the single channel has been unused for a period of time.
Claim 10
Dependent Claim
41 words
A central controller in accordance with claim 1 wherein said central controller further comprises a second storage means for storing requests for service from remote units equipped with data devices, thereby providing a capability of separately processing data remote unit requests.
Claim 11
Independent Claim
184 words
A method of control for a central controller regulating the access of a plurality of remote units to a single communications channel for the purpose of transmitting a message, each remote unit associated with one of a plurality of predetermined groups of remote units, comprising the steps of: detecting an end-of-transmission condition of a first remote unit of a first group; establishing a period of time on the single communications channel, in response to said end-of-transmission condition, during which a remote unit of a second group may request service; processing a received second group remote unit request for service; storing said processed remote unit request in a queue with other remote unit requests; maintaining a grant of service to said first group following said period of time whereby a second remote unit of said first group may transmit; revoking said first group grant of service is said second remote unit does not transmit; and granting said request for service of said second group remote unit in accordance with a priority determined by said storage step when said first group grant of service is revoked.
Claim 12
Independent Claim
184 words
A method of control for a central controller regulating the access of a plurality of remote units to a single communications channel for the purpose of transmitting a message, each remote unit associated with one of a plurality of predetermined groups of remote units, comprising the steps of: detecting an end-of-transmission condition of a first remote unit of a first group; establishing a period of time on the single communications channel, in response to said end-of-transmission condition, during which a remote unit of a second group may request service; processing a received second group remote unit request for service; storing said processed remote unit request in a queue with other remote unit requests; maintaining a grant of service to said first group following said period of time whereby a second remote unit of said first group may transmit; revoking said first group grant of service is said second remote unit does not transmit; and granting said request for service of said second group remote unit in accordance with a priority determined by said storage step when said first group grant of service is revoked.
Claim 13
Dependent Claim
41 words
The method in accordance with claim 10 further comprising the step of generating a signal for transmission to said second group remote units which indicates the commencement of said period of time and acknowledges a previous remote unit request for service.
Claim 14
Dependent Claim
23 words
The method in accordance with claim 10 further comprising the step of recalling remote unit requests for service in a first-in first-out priority.
Claim 15
Dependent Claim
50 words
The method in accordance with claim 10 further comprising the step of authorizing reception by said second group of remote units subsequent to said second group service granting step whereby said second group of remote units will be activated to receive a transmission by said requesting second group remote unit.
Claim 16
Dependent Claim
41 words
The method in accordance with claim 10 further comprising the step of timing the activity of remote units on the single channel in order to revoke said grant of service if said channel is unused for a predetermined period of time.
Claim 17
Dependent Claim
42 words
The method in accordance with claim 10 further comprising the step of timing the duration of remote unit transmission on said single channel in order that said grant of service may be revoked after the expiration of a predetermined period of time.
Claim 18
Dependent Claim
32 words
The method in accordance with claim 10 further comprising the step of granting service immediately to a requesting remote unit when the single channel has been unused for a period of time.
Claim 19
Dependent Claim
31 words
The method in accordance with claim 10 further comprising the step of processing requests for data service from remote units equipped with data devices independent of remote units not so equipped.
References Cited (Backward Citations)
US3233221A
Cited
US3746991A
Cited
US3745462A
Cited
US4135156A
Cited
US3955140A
Cited
US4012597A
Cited
US4013959A
Cited
US4247947A
Cited
GB2063011A
Cited
US4414661A
Cited
US4332027A
Cited
US4477809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |