Method and apparatus for providing full duplex dispatch

• US 20040228292A1
• Filed: 05/12/2003
• Published: 11/18/2004
• Est. Priority Date: 05/12/2003
• Status: Abandoned Application

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Edwards, David W.
• Application Number:
  US10/435,820
• Publication Number:
  US 20040228292A1
• Time in Patent Office: Days
• US Class Current: 370/277
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

A method for providing full duplex dispatch operation includes the step of establishing a dispatch call (102) and determining if a full duplex dispatch mode is desired (104). If full duplex dispatch operation is selected, a signal is sent to the communication system requesting that full duplex dispatch operation is requested. The communication system then provides the necessary channel resources to allow for full duplex dispatch operation (106). In another embodiment, the radio user can select full duplex dispatch mode (202) prior to call setup. A radio (310) capable of providing both half duplex and full duplex dispatch operation is also described.

Claims

1. A method for providing full duplex dispatch operation in a wireless communication device that can operate in both half duplex and full duplex dispatch modes in a wireless communication system, the method comprising the steps of:

(a) transmitting a request from the wireless communication device that a half duplex dispatch call be established between the wireless communication device and at least one other wireless communication device; and

(b) transmitting a request from the wireless communication device to the wireless communication system requesting that the half duplex dispatch call established in step (a) be changed to a full duplex dispatch call.

2. A method as defined in claim 1, wherein the wireless communication device communicates with the at least one other wireless communication device in a full duplex dispatch mode using two half duplex communication channels.

3. A method as defined in claim 1, wherein the wireless communication device communicates with the at least one other wireless communication device in a full duplex dispatch mode using a communication channel capable of supporting full duplex communications.

4. A method as defined in claim 3, wherein the communication channel comprises a Code Division Multiple Access (CDMA) communication channel.

5. A method for providing dispatch operation between a first communication device and a second communication device operating in a wireless communication system that supports both half duplex and full duplex dispatch operation, the method at the first communication device comprising the steps of:

(a) determining if a dispatch call is to be established in a half duplex or full duplex mode; and

(b) sending a request from the first communication device to the wireless communication system for the establishment of a full duplex dispatch call between the first and second communication devices if in step (a) it is determined by the first communication device that the dispatch call is to be established in a full duplex mode.

6. A method as defined in claim 5, wherein step (b) is performed automatically by a user control being activated in the first communication device.

7. A method for providing full duplex dispatch operation in a wireless communication system, comprising the steps of:

(a) establishing a dispatch call between at least two communication devices;

(b) sending a signal to the wireless communication system by one of the at least two communication devices if full duplex dispatch operation is requested; and

(c) placing the at least two communication devices in a full duplex dispatch mode in response to the signal being sent in step (b).

8. A method as defined in claim 7, wherein step (a) is performed by one of the at least two communication devices, and the dispatch call is established in step (a) in a half duplex mode.

9. A method as defined in claim 7, wherein step (b) is performed by the communication device from among the at least two communication devices that established the dispatch call in step (a).

10. A method as defined in claim 9, wherein if full duplex operation is not desired, the signal requesting full duplex dispatch operation is not sent in step (b) and the at least two communication device continue their dispatch call in a half duplex mode.

11. A method as defined in claim 7, wherein in step (c) the wireless communication system provides the necessary system resources to allow the at least two communication devices to operate in a full duplex mode while in the dispatch call.

12. A method as defined in claim 11, wherein the wireless communication system sends a signal to at least one of the at least two communication devices informing it that it is being placed in a full duplex mode.

13. A method for providing full duplex dispatch operation between first and second communication devices in a wireless communication system that provides for both half duplex and full duplex dispatch operation, the method comprising the steps of:

a. determining at the first communication device if a dispatch call is to be made in either a half duplex mode or in a full duplex mode; and

b. establishing a dispatch call between the first and the second communication devices in the full duplex mode of operation if in step (a) it is determined that the full duplex mode of operation is to be used.

14. A method as defined in claim 13, wherein in step (b) the second communication device receives a signal from the wireless communication system informing it if it wants to participate in the full duplex mode.

15. A method as defined in claim 14, wherein the signal sent to the second communication device causes an audio and/or visual alert to be provided at the second communication device.

16. A method as defined in claim 13, wherein in step (a) the determination is made automatically by the first communication device that the dispatch call is to be made in the full duplex mode if the first communication device has been preprogrammed for this automatic selection.

17. A method as defined in claim 16, wherein the automatic selection of the full duplex mode is made if the identification of the second communication device is in a list of communication device identifications stored in the first communication device.

18. A method as defined in claim 13, further comprising the step of:

(c) terminating the full duplex dispatch call between the first and second communication devices if either of the first or second communication devices actively terminates the full duplex dispatch call in response to a user control at either the first or second communication device being activated.

19. A radio communication device, comprising:

a transmitter;

a receiver; and

a controller coupled to the transmitter and receiver, the controller placing the radio communication device in either a half duplex dispatch mode or a full duplex dispatch mode.

20. A radio communication device as defined in claim 19, wherein the controller places the radio communication device in either the half duplex or full duplex dispatch mode in response to a dispatch selection signal received at the receiver.

21. A radio communication device as defined in claim 20, further comprising:

a. a memory coupled to the controller, the memory storing therein the identification of at least a second radio communication device that the radio communication device can automatically establish a full dispatch communication with.

22. A radio communication device as defined in claim 21, further comprising:

a user interface coupled to the controller; and

the radio communication device can automatically establish full duplex dispatch communications with the second radio communication by the user interface being activated.

23. A radio communication device as defined in claim 19, wherein if a signal is received at the receiver indicating that a second radio communication wants to establish full duplex dispatch communications with the radio communication device, a visual and/or audio signal is generated at the radio communication device.