Call setup for a mobile packet data dispatch network

• US 20040121791A1
• Filed: 12/18/2002
• Published: 06/24/2004
• Est. Priority Date: 12/18/2002
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Shaughnessy, Mark L., Schaefer, Bradley R., Sugden, William J., Marick, Mark A., May, Nigel M.
• Granted Patent: US 7,231,223 B2
• Time in Patent Office: Days
• US Class Current: 455/519
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• 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

A proactive speculation method decreases the call setup time for private calls (200) and selective dynamic group calls (300). In a push-to-talk dispatch network (40) an originating mobile unit (10) sends a wake-up packet (54, 114) to the dispatch network (40). Prior to initiating the push-to-talk function, the target mobile units (20-30) receive a wake-up packet (68, 146-148) from network (40). Thereby, prior to establishing the push-to-talk function, each of the mobile units in the push-to-talk call have been coupled via RF links. If the originating mobile unit has a current IP address, direct wake-up packets (72) may be sent.

Claims

1. A push-to-talk call setup method for a one-to-one call in a packet data network comprising the steps of:

selecting by an originating mobile unit a phone activation function;

transmitting by the originating mobile unit a wake-up packet to the packet data network;

selecting, after the transmitting step, by the originating mobile unit a target mobile unit; and

activating a push-to-talk function by the originating mobile unit.

2. A push-to-talk call setup method as claimed in claim 1, wherein there is further included a step of determining by the originating mobile unit whether a stored internet protocol (IP) address for the target mobile unit is valid.

3. A push-to-talk call setup method as claimed in claim 2, wherein if the stored IP address is not valid, there is further included a step of sending a wake-up packet to the packet data network for the target mobile unit.

4. A push-to-talk call setup method as claimed in claim 3, wherein there is further included a step of determining by the packet data network a valid IP address for the target mobile unit.

5. A push-to-talk call setup method as claimed in claim 4, wherein there is further included a step of sending by the packet data network a wake-up packet to the target mobile unit.

6. A, a push-to-talk call setup method as claimed in claim 5, wherein there is further included a steps of:

activating by the originating mobile unit a push-to-talk function with the target mobile unit; and

sending a signaling message by the originating mobile unit to the target mobile unit.

7. A push-to-talk call setup method as claimed in claim 2, wherein if the stored IP address is valid, there is further included a step of sending a wake-up packet directly to the target mobile unit.

8. A push-to-talk call setup method as claimed in claim 7, wherein there is further included steps of:

activating by the originating mobile unit a push-to-talk function with the target mobile unit; and

sending a signaling message by the originating mobile unit to the target mobile unit.

9. A push-to-talk call setup method as claimed in claim 1, wherein the step of selecting by an originating mobile unit a phone activation function includes one or more of the steps of:

selecting by the originating mobile unit a phone book function;

selecting by the originating mobile unit a push-to-talk function from a menu;

opening up by the originating mobile unit a phone cover; and

removing by the originating mobile unit from its holster.

10. A group call setup method in a packet data network comprising the steps of:

selecting by an originating mobile unit a phone activation function;

transmitting by the originating mobile unit a wake-up packet to the packet data network;

selecting one of a plurality of target mobile units, after the step of transmitting, by the originating mobile unit;

transmitting, by the originating mobile unit, a wake-up packet for the one of the plurality of target mobile units; and

iterating the steps of selecting one and transmitting the wake-up packet for each of the plurality of target mobile units.

11. A group call setup method as claimed in claim 10 wherein there is further included a step of activating a push-to-talk function by the originating mobile unit.

12. A group call setup method as claimed in claim 11, wherein after transmitting the wake-up packet for each of the plurality of target mobile units, there is further included a step of sending by the originating mobile unit a group call invite request for each of the plurality of target mobile units.

13. A group call setup method as claimed in claim 10, wherein there is further included a step of sending by the packet data network a session initiation protocol request to each of the plurality of target mobile units.

14. A push-to-talk call setup method as claimed in claim 10, wherein the step of selecting by an originating mobile unit a phone activation function includes one or more of the steps of:

selecting by the originating mobile unit a phone book function;

selecting by the originating mobile unit a push-to-talk function from a menu;

opening up by the originating mobile unit a phone cover; and

removing by the originating mobile unit from its holster.

15. A group call setup method in a packet data network comprising the steps of:

selecting by an originating mobile unit a phone activation function;

transmitting by the originating mobile unit a wake-up packet to the packet data network;

selecting one of a plurality of target mobile units, after the step of transmitting, by the originating mobile unit;

transmitting, by the originating mobile unit, a wake-up packet directly to one of the plurality of target mobile units; and

iterating the steps of selecting one and transmitting the wake-up packet directly for each of the plurality of target mobile units.

16. A group call setup method as claimed in claim 15, wherein the step of transmitting a wake-up packet directly to one of the plurality of target mobile units is performed if the originating mobile unit has a valid IP address for the one of the plurality of mobile units.

17. A group call setup method as claimed in claim 15 wherein there is further included a step of activating a push-to-talk function by the originating mobile unit.

18. A group call setup method as claimed in claim 15, wherein after transmitting the wake-up packet directly to each of the plurality of target mobile units, there is further included a step of sending by the originating mobile unit a group call invite request for each of the plurality of target mobile units.

19. A push-to-talk call setup method as claimed in claim 15, wherein the step of selecting by an originating mobile unit a phone activation function includes one or more of the steps of:

selecting by the originating mobile unit a phone book function;

selecting by the originating mobile unit a push-to-talk function from a menu;

opening up by the originating mobile unit a phone cover; and

removing by the originating mobile unit from its holster.