Method and apparatus for indicating an expected level of quality in a private push to talk (PTT) network

• US 20060223562A1
• Filed: 03/29/2005
• Published: 10/05/2006
• Est. Priority Date: 03/29/2005
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Mathis, James E.
• Granted Patent: US 7,353,038 B2
• Time in Patent Office: Days
• US Class Current: 455/518
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

A method and apparatus for indicating an expected level of quality in a private Push To Talk (PTT) network are disclosed. The method and apparatus receive at least one of an affiliation message and a talkgroup call request for a first subscriber unit of the private PTT network wherein a talkgroup is associated with at least one of the private PTT network, another PTT network, and a public network. The method and system determine an expected level of quality for the talkgroup and send the determined expected level of quality to the subscriber unit.

Claims

1. A method for indicating an expected level of quality in a private Push To Talk (PTT) network, the method comprising the steps of:

at a PTT controller of the private PTT network;

receiving an affiliation message for a first subscriber unit of the private PTT network wherein the affiliation message identifies a talkgroup for the first subscriber unit, wherein the talkgroup is associated with at least one of the private PTT network, another PTT network, and a public network;

determining an expected level of quality for the affiliated talkgroup; and

sending the determined expected level of quality to the subscriber unit.

2. The method of claim 1 wherein the step of determining further comprises the sub-step of referring to a database of the PTT controller to determine whether the affiliated talkgroup spans a plurality of networks.

3. The method of claim 1 wherein the step of sending further comprises the sub-step of transmitting a message to the subscriber unit comprising a numeric value indicating the determined expected level of quality.

4. The method of claim 1 further comprising the step of indicating the determined expected level of quality to a user of the subscriber unit.

5. The method of claim 1 further comprising the steps of:

receiving a talkgroup call request for the first subscriber unit of the private PTT network to communicate with a second subscriber unit wherein the second subscriber is associated with at least one of the private PTT network, another PTT network, and a public network;

authorizing the first subscriber unit to participate in a talkgroup call of the talkgroup call request;

determining an expected level of quality for the selected talkgroup call; and

sending the determined expected level of quality to the subscriber unit.

6. The method of claim 5 wherein the step of determining further comprises the sub-step of referring to a database of the PTT controller to determine whether the talkgroup call spans a plurality of networks.

7. The method of claim 5 wherein the step of sending further comprises the sub-step of transmitting a message to the subscriber unit comprising a numeric value indicating the determined expected level of quality.

8. In a private Push To Talk (PTT) network having a PTT controller and a plurality of subscriber units affiliated with a talkgroup, a method for indicating an expected level of quality, the method comprising the steps of:

at a subscriber unit in the private PTT network;

sending an affiliation message by the subscriber unit to the PTT controller wherein the affiliation message identifies a talkgroup for the subscriber unit, wherein the talkgroup is associated with at least one of the private PTT network, another PTT network, and a public network;

receiving a message by the PTT controller with an expected level of quality for the affiliated talkgroup; and

indicating the expected level of quality for the affiliated talkgroup to a user of the subscriber unit.

9. The method of claim 8 wherein the step of indicating further comprises the sub-step of displaying at the subscriber unit information on the expected level of quality.

10. The method of claim 8 wherein the information is a numeric value.

11. The method of claim 8 further comprising the steps of:

sending a talkgroup call request by the subscriber unit to the PTT controller;

receiving a message by the PTT controller with an expected level of quality for a talkgroup call of the talkgroup call request; and

indicating the expected level of quality for the talkgroup call to a user of the subscriber unit.

12. The method of claim 11 wherein the step of indicating comprises either an audible or visual form.

13. The method of claim 11 wherein the step of indicating further comprises the sub-step of displaying at the subscriber unit information on the expected level of quality.

14. The method of claim 13 wherein the information is a numeric value.

15. The method of claim 13 wherein the information is an audible tone.

16. The method of claim 11 wherein the step of indicating is programmable by the user of the subscriber unit.

17. The method of claim 11 wherein the step of sending further comprises the step of delaying an amount of time before communicating a selected talkgroup to the PTT controller, whereby the amount of time is programmable.

18. A system for indicating an expected level of quality for a talkgroup call in a private Push To Talk (PTT) network comprising:

a receiver for receiving messages which communicate information about an expected level of quality for a talkgroup call in the private PTT network;

a selector which chooses a talkgroup of the talkgroup call by locking onto a specific frequency in the private PTT network;

a transmitter to communicate the selected talkgroup to a PTT controller of the private PTT network; and

an indicator which signals the information about the expected level of quality to a user of the system,

wherein the operation of the receiver, the selector, the transmitter, and the indicator are controlled by a processor of the processor.

19. The system of claim 18 wherein the indicator futher comprises a display which conveys to a user of the system the information about the expected level of quality for the talkgroup call in visual form.

20. The system of claim 18 wherein the indicator further comprises a speaker which conveys to a user of the system the information about the expected level of quality for the talkgroup call in audible form.