Patent US5287551A successfully refreshed from Google Patents.
US5287551A
Expired / Lapsed
US
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Radio communication apparatus and method for voice channel busy call back
Assignee: Motorola Solutions Inc
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Filing: 1992-10-21
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Granted: 1994-02-15
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Expires: 2012-10-21
Abstract
Abstract An apparatus and method for issuing busy call-backs (146) on the voice channel to busied communication units (209,211) on a trunked radio communication system (200) is disclosed. This is accomplished, in part, by issuing a busy signal (104), via a control resource (203), to a communication unit when a requested communication resource is unavailable. Additionally, the radio communication unit (209,211) is capable of receiving the busy signal via the control resource (213) and participating in a second communication while in a busied state. The resource controller (201) is capable of allowing the busied communication unit (209,211) to participate in a second communication on a second communication resource (215) and issuing the call-back signal during the second communication.
Inventors
- 👤 Leslie G. Gustafson, Jr.
- 👤 Sewim F. Ablay
- 👤 Mark L. Shaughnesy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:41
CPC Classifications
H; H04; H04W; H04W72/00; H04W72/20; H04W4/00; H04W4/06; H04W4/10; H04W76/00; H04W76/40; H04W76/45
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
189 words
A radio communication system having at least one resource controller which is able to allocate a plurality of communication resources and issue a busy signal, via a control resource, to a communication unit when a requested communication resource is unavailable, the communication unit being able to request access to a first communication resource in order to participate in a first communication, the radio communication system comprising: means at the communication unit for receiving the busy signal on the control resource, thereby producing a denied communication unit and placing said denied communication unit in a wait state upon receipt of the busy signal; means at the resource controller for allowing said denied communication unit to monitor a second communication on a second communication resource; means at said denied communication unit for participating in said second communication, while remaining in said wait state; and means at the resource controller for issuing, when a communication resource of the type requested by said denied communication unit becomes available, a call-back signal directed to said denied communication unit during the second communication, thereby giving the denied communication unit access to the available communication resource.
Claim 2
Dependent Claim
189 words
A radio communication system having at least one resource controller which is able to allocate a plurality of communication resources and issue a busy signal, via a control resource, to a communication unit when a requested communication resource is unavailable, the communication unit being able to request access to a first communication resource in order to participate in a first communication, the radio communication system comprising: means at the communication unit for receiving the busy signal on the control resource, thereby producing a denied communication unit and placing said denied communication unit in a wait state upon receipt of the busy signal; means at the resource controller for allowing said denied communication unit to monitor a second communication on a second communication resource; means at said denied communication unit for participating in said second communication, while remaining in said wait state; and means at the resource controller for issuing, when a communication resource of the type requested by said denied communication unit becomes available, a call-back signal directed to said denied communication unit during the second communication, thereby giving the denied communication unit access to the available communication resource.
Claim 3
Dependent Claim
26 words
A radio communication system in accordance with claim 1, further comprising means at the communication unit, responsive to said call-back signal, for generating an audible tone.
Claim 4
Dependent Claim
22 words
A radio communication system in accordance with claim 1, further comprising means at said busied communication unit for acknowledging said call-back signal.
Claim 5
Dependent Claim
25 words
A radio communication system in accordance with claim 1, further comprising means at the resource controller for issuing said call-back signal on the control resource.
Claim 6
Dependent Claim
25 words
A radio communication system in accordance with claim 1, further comprising means at the communication unit for cancelling the request for the first communication resource.
Claim 7
Dependent Claim
22 words
A radio communication system in accordance with claim 1, further comprising means at the communication unit for participating in the first communication.
Claim 8
Dependent Claim
166 words
A radio communication unit which is able to request, via a control resource, access to a first communication resource in order to engage in a first communication, and is further able to receive a plurality of signals from a resource controller, the radio communication unit further comprising: means for receiving a busy signal from the resource controller when the first communication resource is unavailable, thereby producing a denied communication unit and placing said denied communication unit in a wait state upon receipt of the busy signal; at said denied communication unit; means for participating in a second communication on a second communication resource, while remaining in said wait state for said first communication resource; means for receiving a call-back signal from the resource controller during the second communication when a communication resource of the same type as the first communication resource becomes available, such that the denied communication unit is given access to the available communication resource; and means for responding to the call back signal.
Claim 9
Dependent Claim
166 words
A radio communication unit which is able to request, via a control resource, access to a first communication resource in order to engage in a first communication, and is further able to receive a plurality of signals from a resource controller, the radio communication unit further comprising: means for receiving a busy signal from the resource controller when the first communication resource is unavailable, thereby producing a denied communication unit and placing said denied communication unit in a wait state upon receipt of the busy signal; at said denied communication unit; means for participating in a second communication on a second communication resource, while remaining in said wait state for said first communication resource; means for receiving a call-back signal from the resource controller during the second communication when a communication resource of the same type as the first communication resource becomes available, such that the denied communication unit is given access to the available communication resource; and means for responding to the call back signal.
Claim 10
Dependent Claim
20 words
A radio communication unit in accordance with claim 7, wherein said call-back signal is issued on said second communication resource.
Claim 11
Dependent Claim
22 words
A radio communication unit in accordance with claim 7, further comprising means for initiating said second communication on said second communication resource.
Claim 12
Dependent Claim
39 words
A radio communication unit in accordance with claim 7, wherein a plurality of requests for communication resources have been denied, further comprising means for generating a list whose elements each correspond to one of said plurality of denied requests.
Claim 13
Dependent Claim
19 words
A radio communication unit in accordance with claim 10, further comprising means for displaying the list of denied requests.
Claim 14
Dependent Claim
153 words
A radio communication resource controller which is able to allocate communication resources via a control resource, and send a plurality of signals to a communication unit requesting to participate in a first communication on a first communication resource, the signals comprising a busy signal and a call-back signal, the radio communication resource controller further comprising: means for issuing the busy signal to the communication unit when the first communication resource is unavailable, thereby producing a denied communication unit and placing said denied communication unit in a wait state upon issuing the busy signal; means for allowing the denied communication unit to participate in a second communication on a second communication resource, while said denied communication remains in said wait state; and means for issuing a call-back signal on said second communication resource directed to the denied communication unit when a communication resource of the same type as the first communication resource becomes available.
Claim 15
Dependent Claim
153 words
A radio communication resource controller which is able to allocate communication resources via a control resource, and send a plurality of signals to a communication unit requesting to participate in a first communication on a first communication resource, the signals comprising a busy signal and a call-back signal, the radio communication resource controller further comprising: means for issuing the busy signal to the communication unit when the first communication resource is unavailable, thereby producing a denied communication unit and placing said denied communication unit in a wait state upon issuing the busy signal; means for allowing the denied communication unit to participate in a second communication on a second communication resource, while said denied communication remains in said wait state; and means for issuing a call-back signal on said second communication resource directed to the denied communication unit when a communication resource of the same type as the first communication resource becomes available.
Claim 16
Independent Claim
177 words
A method of communication resource allocation for use in a radio communication system having at least one resource controller and at least two communication units, the resource controller being able to allocate a plurality of communication resources and issue a busy signal, via a control resource, to the at least two communication units when a requested type of communication resource is unavailable, the communication units being able to indicate a need to access a first communication resource in order to engage in a first communication, the method comprising the steps of: receiving, at one of the at least two communication units, the busy signal on the control resource, thereby placing a denied communication unit in a wait state; allowing said denied communication unit to participate in a second communication on a second communication resource; at said denied communication unit, participating in said second communication, while remaining in the wait state; and issuing from the resource controller a call-back signal directed to said busied communication unit when a communication resource of the type requested communication resource becomes available.
Claim 17
Independent Claim
177 words
A method of communication resource allocation for use in a radio communication system having at least one resource controller and at least two communication units, the resource controller being able to allocate a plurality of communication resources and issue a busy signal, via a control resource, to the at least two communication units when a requested type of communication resource is unavailable, the communication units being able to indicate a need to access a first communication resource in order to engage in a first communication, the method comprising the steps of: receiving, at one of the at least two communication units, the busy signal on the control resource, thereby placing a denied communication unit in a wait state; allowing said denied communication unit to participate in a second communication on a second communication resource; at said denied communication unit, participating in said second communication, while remaining in the wait state; and issuing from the resource controller a call-back signal directed to said busied communication unit when a communication resource of the type requested communication resource becomes available.
Claim 18
Independent Claim
137 words
A method of requesting a communication resource for use in a radio communication unit which is able to request access to, via a control resource, a first communication resource in order to engage in a first communication, the communication unit being further able to receive a plurality of signals from a resource controller, the method comprising the steps of: receiving a busy signal from the resource controller indicating that a communication resource of a requested type is unavailable, thereby placing a denied communication unit in a wait state; at the denied communication unit; participating in a second communication on a second communication resource, while remaining in the wait state; receiving, when a communication resource of the type requested becomes available, a call-back signal from the resource controller during the second communication; and responding to the call-back signal.
Claim 19
Independent Claim
137 words
A method of requesting a communication resource for use in a radio communication unit which is able to request access to, via a control resource, a first communication resource in order to engage in a first communication, the communication unit being further able to receive a plurality of signals from a resource controller, the method comprising the steps of: receiving a busy signal from the resource controller indicating that a communication resource of a requested type is unavailable, thereby placing a denied communication unit in a wait state; at the denied communication unit; participating in a second communication on a second communication resource, while remaining in the wait state; receiving, when a communication resource of the type requested becomes available, a call-back signal from the resource controller during the second communication; and responding to the call-back signal.
Claim 20
Independent Claim
149 words
A method of communication resource allocation for use in a radio communication resource controller, the resource controller being able to allocate communication resources via a control resource, and send a plurality of signals to a communication unit requesting to participate in a first communication on a first communication resource, the signals comprising a busy signal and a call-back signal, the method comprising the steps of: issuing the busy signal to the communication unit when the first communication resource is unavailable, thereby producing a denied communication unit and placing said denied communication unit in a wait state; allowing the denied communication unit to participate in a second communication on a second communication resource, while remaining in the wait state; and issuing the call-back signal on said second communication resource directed to the denied communication unit when a communication resource of the same type as the first communication resource becomes available.
Claim 21
Independent Claim
149 words
A method of communication resource allocation for use in a radio communication resource controller, the resource controller being able to allocate communication resources via a control resource, and send a plurality of signals to a communication unit requesting to participate in a first communication on a first communication resource, the signals comprising a busy signal and a call-back signal, the method comprising the steps of: issuing the busy signal to the communication unit when the first communication resource is unavailable, thereby producing a denied communication unit and placing said denied communication unit in a wait state; allowing the denied communication unit to participate in a second communication on a second communication resource, while remaining in the wait state; and issuing the call-back signal on said second communication resource directed to the denied communication unit when a communication resource of the same type as the first communication resource becomes available.
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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) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |