Method and apparatus for quickly establishing a CDMA dispatch call
AssigneeMotorola, Inc.
InventorsMichael L. Needham, Timothy J. Wilson, Leigh M. Chinitz
Life of this patent
Estimating the term…
Abstract
To address the need for an apparatus and method for quickly establishing a CDMA dispatch call, the present invention provides for paging mobile stations (e.g., 120-123) to inform them of the call and then starting the dispatch call without waiting for page responses from the call participants. The dispatch call is first transmitted by base sites (e.g., 110-112) of all the service coverage areas (e.g., 101-103) that may have call participants, and then discontinued at those base sites where no page responses are received within a period of time. Thus, the dispatch call is established while “call setup” effectively continues.
Claims14
A method for a base site to quickly establish a CDMA dispatch call comprising the steps of:
- transmitting a broadcast page via an outbound paging channel that indicates an outbound traffic channel used for the dispatch call;
- beginning to transmit the dispatch call via the traffic channel;
- monitoring an inbound access channel for page responses to the broadcast page;
- when no page responses are received within a period of time,
- ceasing to transmit the dispatch call via the traffic channel;
- and
- deallocating the traffic channel.
A base site comprising:
- a transmitter;
- a receiver;
- and
- a controller, coupled to the transmitter and receiver, adapted to instruct the transmitter to transmit a broadcast page via an outbound paging channel that indicates an outbound traffic channel used for a dispatch call, adapted to instruct the transmitter to transmit the dispatch call via the traffic channel, adapted to instruct the receiver to monitor an inbound access channel for page responses to the broadcast page;
- and adapted to deallocate the traffic channel and to instruct the transmitter to cease transmitting the dispatch call via the traffic channel when no page responses are received within a period of time.
A method for a CDMA mobile station (MS) to quickly join a CDMA dispatch call comprising the steps of:
- receiving a broadcast page on an outbound paging channel that indicates an outbound traffic channel used for the dispatch call;
- beginning to receive the dispatch call via the traffic channel;
- transmitting a page response to the broadcast page subsequent to beginning to receive the dispatch call.
A mobile station (MS) comprising:
- a transmitter;
- a receiver adapted to receive a broadcast page on an outbound paging channel that indicates an outbound traffic channel used for a dispatch call;
- and
- a processor, coupled to the transmitter and receiver, adapted to instruct the receiver to begin to receive the dispatch call via the traffic channel and adapted to subsequently instruct the transmitter to transmit a page response to the broadcast page.
Dependencies are inferred from the claim text.