Concurrent packet data session set-up for push-to-talk over cellular

• US 20050265350A1
• Filed: 05/28/2004
• Published: 12/01/2005
• Est. Priority Date: 05/28/2004
• Status: Abandoned Application

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Narasimha, Murali, Gutierrez, Alberto
• Application Number:
  US10/857,243
• Publication Number:
  US 20050265350A1
• Time in Patent Office: Days
• US Class Current: 370/395.200
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• 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 68/12 Inter-network notification
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

This concurrent packet data session set-up for Push-to-talk over Cellular (PoC) services decreases the connection set-up time for a PoC call by using processes that are circuit-switched-based to locate and page a called communication device, and to initiate traffic and packet data session set-ups for the called communication device. A method for setting up a packet data session between an originating communication device (211) and a called communication device (215) includes the steps of: requesting a called-device active packet data session set-up for the called communication device (messages 271, 272, 273, 274, 275) and initiating an originating-device active packet data session set-up for the originating communication device (messages 271, 222, 224). The first step can use circuit-switched-based messages and processes to locate the called communication device and set up a traffic channel for the called communication device. After an active packet data session (263) is set-up for the originating communication device (211), the originating-device active packet data session (263) can be used to request a PoC voice channel (message 290). Because a called-device active packet data session set-up has already been requested, the called communication device (215) can respond to the PoC voice channel request quickly (message 293).

Claims

1. A method for setting up a packet data session between an originating communication device and a called communication device comprising the steps of:

requesting a called-device active packet data session set-up for the called communication device; and

initiating, concurrently with the step of requesting, an originating-device active packet data session set-up for the originating communication device.

2. A method in accordance with claim 1, wherein the step of requesting a called-device traffic channel set-up comprises the step of:

locating the called communication device.

3. A method in accordance with claim 2, wherein the step of requesting a called-device traffic channel set-up further comprises the step of:

setting up a traffic channel for the called communication device.

4. A method in accordance with claim 3, wherein the step of requesting a called-device traffic channel set-up further comprises the step of:

setting up an active packet data session for the called communication device.

5. A method in accordance with claim 1, wherein the step of initiating a originating-device active packet data session set-up comprises the step of:

setting up a traffic channel for the originating communication device.

6. A method in accordance with claim 1, wherein the step of initiating a originating-device active packet data session set-up comprises the step of:

setting up an active packet data session for the originating communication device.

7. A method in accordance with claim 1 further comprising the step of:

completing the originating-device active packet data session set-up; and

using the originating-device active packet data session to request a push-to-talk over cellular (PoC) voice channel.

8. A method for setting up a packet data session between an originating communication device and a called communication device comprising the steps of:

sending a packet data origination message to a first radio access network serving the originating communication device;

setting up a first traffic channel and a first active packet data session for the originating communication device;

locating a second radio access network serving the called communication device, concurrently with the step of setting of a first traffic channel and a first active packet data session; and

setting up a second traffic channel and a second active packet data session for the called communication device.

9. A method in accordance with claim 8, wherein the packet data origination message indicates whether a Push-to-talk over Cellular (PoC) is being requested.

10. A method in accordance with claim 8, further comprising the step of:

sending a Push-to-talk over Cellular request message, after the step of setting up a first traffic channel and a first active packet data session.

11. A method in accordance with claim 10, further comprising the step of:

responding to the Push-to-talk over Cellular request message, after the step of setting up a second traffic channel and a second active packet data session.

12. A method for a base station controller comprising the steps of:

receiving a packet data service origination message;

determining if the packet data service origination message results from a Push-to-talk over Cellular service request; and

sending a Push-to-talk over Cellular (PoC) indication to a mobile switching center, if the packet data service origination message results from a PoC service request.

13. A method according to claim 12 further comprising the step of:

setting up a traffic channel, after the step of sending a PoC indication.

14. A Push-to-talk over Cellular (PoC) origination message comprising:

a PoC origination indicator; and

an identification for at least one called communication device.

15. A Push-to-talk over Cellular (PoC) intersystem page message comprising:

an identification parameter to identify a called communication device;

a location parameter to specify a paging area for the called communication device;

an MSCID parameter to identify an originating mobile switching center; and

a PoC parameter for indicating whether the PoC intersystem page message is for a PoC call.