Radio communication apparatus and method for voice channel busy call back
First Claim
1. 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.
0 Assignments
0 Petitions
Accused Products
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.
44 Citations
15 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. 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. - View Dependent Claims (8, 9, 10, 11)
-
-
12. 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.
-
-
13. 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.
-
-
14. 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.
-
-
15. 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.
-
Specification