Method for providing VoIP services for wireless terminals

• US 8,014,386 B2
• Filed: 12/27/2009
• Issued: 09/06/2011
• Est. Priority Date: 11/08/2001
• Status: Expired due to Fees

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Chu, Yue-Chuan, Hua, Ningming
• Primary Examiner(s): LEE, CHI HO A
• Application Number:
  US12/647,529
• Publication Number:
  US 20100098040A1
• Time in Patent Office: 618 Days
• Field of Search: 370/352, 370/401
• US Class Current: 370/352
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]

Abstract

The present invention relates to a system and method for wireless telecommunication in a packet-based network comprising a Software Radio Port (SRP) which functions as a radio base station and a VoIP gateway to interconnect the wireless network with the VoIP packet network. Together with a Network Server Platform (NSP) and VoIP call-server, the SRP combines mobile call processing signaling with the VoIP call signaling to establish calls between the mobile and VoIP device or between mobiles. The SRP establishes the voice path to the mobile station over the air and the RTP media path to a party over a packet network for a call. These two paths are interconnected at the SRP so that an end-to-end voice path is established.

Claims

1. A device for processing voice over internet protocol data packets for wireless terminals, comprising:

an internet protocol/ethernet interface for establishing a real-time transport protocol path with a voice over internet protocol phone;

a voice over internet protocol media gateway interposed between an air interface that establishes a voice path wirelessly with a mobile station and the internet protocol/ethernet interface for media conversion and transportation;

a voice over internet protocol signaling gateway for controlling voice over internet protocol call processing; and

,

a call control in communication with the voice over internet protocol media gateway and the voice over internet protocol signaling gateway for controlling call processing for wireless terminals and coordinating with voice over internet protocol call processing.

2. The device of claim 1, wherein signaling messages and a voice stream are received from the mobile station via the air interface.

3. The device of claim 1, wherein the call control is configured for:

receiving signaling messages via the air interface;

instructing the voice over internet protocol media gateway to set up real-time transport protocol paths to called parties; and

,

instructing the voice over internet protocol signaling gateway to set up voice over internet protocol calls to the called parties.

4. The device of claim 1, wherein the voice over internet protocol signaling gateway is configured for:

receiving messages from the call control;

processing the messages from the call control; and

,

managing voice over internet protocol call-related activities.

5. The device of claim 1, wherein the voice over internet protocol media gateway is configured for:

receiving messages from the call control;

processing the messages from the call control;

receiving a voice stream via the air interface; and

packetizing the voice stream into real-time transport protocol data packets.

6. The device of claim 1, wherein the internet protocol/ethernet interface receives real-time transport protocol data packets from the voice over internet protocol media gateway and messages from the call control and the voice over internet protocol signaling gateway, and sends the real-time transport protocol data packets and the messages to a packet data network.

7. The device of claim 1, wherein the internet protocol/ethernet interface receives messages and real-time transport protocol packets from a packet data network, sends the real-time transport protocol packets to the voice over internet protocol media gateway, and sends the messages to the call control and the voice over internet protocol signaling gateway.

8. The device of claim 1, wherein the call control is configured for:

receiving signaling messages from the internet protocol/ethernet interface and the voice over internet protocol signaling gateway; and

managing mobile station-related activities.

9. The device of claim 1, wherein the voice over internet protocol signaling gateway is configured for:

receiving messages from the internet protocol/ethernet interface;

instructing the call control to manage mobile calls; and

managing voice over internet protocol call-related activities.

10. The device of claim 1, wherein the voice over internet protocol media gateway is configured for:

receiving the voice over internet protocol data packets from the internet protocol/ethernet interface; and

converting the voice over internet protocol data packets to a voice stream.

11. The device of claim 1, wherein the air Interface receives a voice stream from the voice over internet protocol media gateway and receives signaling messages from the call control.

12. A method of providing a path between a voice over internet protocol device in a network and a mobile station, comprising:

tuning the mobile station to a digital traffic channel to establish a voice path wirelessly via a software radio port;

engaging a voice over internet protocol call-server to set up a voice over internet protocol call;

generating a ringback tone to the mobile station;

establishing a real-time transport protocol media path for exchange of real-time transport protocol data packets via said the software radio port; and

interconnecting the voice path and the real-time transport protocol media path over a packet network via the software radio port.

13. The method of claim 12, wherein the voice over internet protocol device comprises a voice over internet protocol phone.

14. The method of claim 12, wherein the tuning is in response to receiving a call origination message from the mobile station and engaging a network server platform to set up a mobile call.

15. The method of claim 12, wherein the tuning comprises:

sending a message to tune the mobile station to a specified digital traffic channel; and

detecting the mobile station as being tuned to the specified digital traffic channel.

16. The method of claim 12, wherein the engaging comprises:

sending a voice over internet protocol call connection request to the voice over internet protocol call-server;

analyzing a called number; and

setting up a voice over internet protocol call via the voice over internet protocol call-server.

17. The method of claim 12, wherein the generating comprises:

receiving a ringing indication from a called party;

generating the ringback tone in response to the receiving; and

transmitting the ringback tone to the mobile station.

18. The method of claim 12, wherein the establishing comprises:

receiving a connect indication from a called party;

turning off the ringback tone;

setting up the real-time transport protocol media path for exchange of the real-time transport protocol data packets; and

informing a network server platform of the call connection.

19. The method of claim 12, wherein the interconnecting comprises:

converting received voice frames to real-time transport protocol packets to be sent to the packet network, and

converting received real-time transport protocol packets to voice frames to be sent to the mobile station.

20. A method of providing a path between a voice over internet protocol device in a packet network and a mobile station, comprising:

processing a call connection request at a voice over internet protocol call-server;

initiating mobile call set-up at a network server platform;

tuning the mobile station to a digital traffic channel to establish a first path wirelessly via a software radio port;

establishing a real-time transport protocol media path for exchange of real-time transport protocol data packets via the software radio port; and

interconnecting the first path and the real-time transport protocol media path over the packet network via the software radio port.