Transmit channel policing system, device, and method

• US 7,792,542 B2
• Filed: 07/16/2004
• Issued: 09/07/2010
• Est. Priority Date: 07/16/2004
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Research In Motion Limited (Blackberry Limited)
• Inventors: Rao, Padakandla Krishna, Yau, Janus Sing
• Primary Examiner(s): Anderson; Matthew D
• Assistant Examiner(s): GONZALES, APRIL GUZMAN
• Application Number:
  US10/892,202
• Publication Number:
  US 20060014498A1
• Time in Patent Office: 2,244 Days
• Field of Search: 455/90.2, 455/515, 455/518, 455/519, 455/458, 455/521
• US Class Current: 455/519
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

Systems and methods are provided for controlling transmit channel utilization in systems providing walkie-talkie-like communications to wireless devices. Parameters such as a maximum talk time and back off time are provided to each wireless device to control how long they can continuously occupy the talk channel, and to control how soon after releasing the talk channel they can again access the talk channel.

Claims

1. A method for controlling a transmit channel of a push-to-talk wireless device, the method comprising:

receiving parameters comprising;

(a) a maximum talk time (MTT) that represents an amount of time the push-to-talk wireless device can continuously occupy the transmit channel; and

(b) a back off time (BOT);

being granted the transmit channel;

after upon continuously occupying the transmit channel for the MTT, the push-to-talk wireless device automatically releasing the transmit channel thereby allowing another device to occupy the transmit channel;

after automatically releasing the transmit channel, starting a BOT timer; and

waiting until expiry of the BOT timer before transmitting a request for the transmit channel.

2. The method of claim 1, wherein the receiving is following a registration of the push-to-talk wireless device.

3. The method of claim 1, wherein the parameters are received from a network implemented using at least one of PoC, IDEN, 1xRTT CDMA, UMTS, GSM/GPRS and TDMA.

4. A push-to-talk wireless device comprising:

a processing element configured to control a transmit channel of the push-to-talk wireless device by;

receiving parameters comprising;

(a) maximum talk time (MTT) that represents an amount of time the push-to-talk wireless device an automatically occupy the transmit channel; and

(b) a back off time (BOT);

being granted the transmit channel;

upon continuously occupying the transmit channel for the MTT, the push-to-talk wireless device automatically releasing the transmit channel thereby allowing another device to occupy the transmit channel;

after automatically releasing the transmit channel, starting a BOT timer; and

waiting until expiry of the BOT timer before transmitting a request for the transmit channel.

5. The push-to-talk wireless device of claim 4, wherein the processing element is configured to receive the parameters following a registration of the push-to-talk wireless device.

6. The push-to-talk wireless device of claim 4, wherein the parameters are received from a network implemented using at least one of PoC, IDEN, IxRTT CDMA, UMTS, GSM/GPRS and TDMA.

7. A method for controlling a transmit channel of a push-to-talk wireless device, the method comprising:

sending parameters comprising;

(a) a maximum talk time (MTT) that represents an amount of time the push-to- talk wireless device can continuously occupy the transmit channel; and

(b) a back off time (BOT) representing a minimum time after the release of the transmit channel before the push-to-talk wireless device can again request the transmit channel; and

granting the transmit channel;

wherein upon the transmit channel being continuously occupied for the MTT, the transmit channel is automatically released thereby allowing another device to occupy the transmit channel.

8. The method of claim 7, wherein the sending is following a registration of the push-to-talk wireless device.

9. The method of claim 7, wherein the parameters are sent by a network implemented using at least one of PoC, IDEN, I xRTT CDMA, UMTS, GSM/GPRS and TDMA.

10. An apparatus comprising:

a talk control element configured to control a transmit channel of a push-to-talk wireless device by;

sending parameters comprising;

(a) a maximum talk time (MIT) that represents an amount of time the push-to-talk wireless device can continuously occupy the transmit channel; and

(b) a back offtime (BOT) representing a minimum time after the release of the transmit channel before the push-to-talk wireless device can again request the transmit channel; and

granting the transmit channel;

wherein upon the transmit channel being continuously occupied for the MIT, the transmit channel is automatically released thereby allowing another device to occupy the transmit channel.

11. The apparatus of claim 10, wherein the talk control element is configured to send the parameters following a registration of the push-to-talk wireless device.

12. The apparatus of claim 10, wherein the talk control element is part of a network implemented using at least one of PoC, IDEN, I xRTT CDMA, UMTS, GSM/GPRS and TDMA.

13. The apparatus of claim 10, wherein the talk control element is external to a network implemented using at least one of PoC, IDEN, IxRTT CDMA, UMTS, GSM/GPRS and TDMA.