Method and system for serverless VoIP service in personal communication network

• US 20060126594A1
• Filed: 12/10/2004
• Published: 06/15/2006
• Est. Priority Date: 12/10/2004
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Tu, Guan-Hua
• Granted Patent: US 7,519,075 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• 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: H04M 7/0042 where the data service is a text-based messaging service H04M7/0054 takes precedence

Abstract

Method and system for supporting serverless VoIP service are provided. Network information of a first device and a second device is exchanged through a telecommunication network. A VoIP connection between the first and second devices can be established through an internet based network according to the exchanged network information. The network information may comprise an IP address and a port number, and can be delivered by short message service.

Claims

1. A method of Voice over Internet Protocol (VoIP) in a network having a first device and a second device, the first device and the second device respectively having a network information corresponding to an internet based network, comprising:

exchanging the network information between the first device and the second device through the network; and

establishing a VoIP connection between the first device and the second device through the internet based network according to the exchanged network information.

2. The VoIP method according to claim 1, wherein the network information comprises an IP address and a port number.

3. The VoIP method according to claim 1, wherein the exchanging step further comprises:

sending a query instant message carrying the network information of the first device to the second device; and

responding the query instant message with a response instant message carrying the network information of the second device to the first device when the query instant message is received by the second device.

4. The VoIP method according to claim 3, wherein the query instant message and the response instant message respectively comprise a user name, a user phone number, an IP address and a port number.

5. The VoIP method according to claim 3, wherein the establishing step further comprises:

sending a signaling invite request to the second device when the response instant message is received by the first device;

sending a signaling confirm to the first device if the second device accepts the signaling invite request; and

replying with a signaling acknowledgement to the second device when the signaling confirm is received by the first device.

6. The VoIP method according to claim 1, wherein the network information of the second device is stored in at least one database, further comprising:

sending a signaling query through the internet based network to the second device according to the network information of the second device stored in the database; and

validating the network information of the second device stored in the database if a signaling response replied from the second device is received.

7. The VoIP method according to claim 6, further comprising:

deleting the network information of the second device from the database if no signaling response is received in a predetermined time.

8. The VoIP method according to claim 6, wherein the signaling query carries the network information of the first device, and the signaling response carries the network information of the second device.

9. The VoIP method according to claim 6, further comprising sending a signaling update through the internet based network to the second device according to the network information of the second device stored in the database when the network information of the first device is changed, wherein the signaling update carries the updated network information of the first device.

10. The VoIP method according to claim 6, wherein the exchanging step further comprising:

checking whether the network information of the second device is in the database; and

if yes, directly taking the network information of the second device in the database as the exchanged network information.

11. The VoIP method according to claim 1, wherein the network information is exchanged using short message service (SMS), Multimedia Messaging Service (MMS), or Instant Messaging and Presence Services (IMPS) provided by the network.

12. The VoIP method according to claim 1, wherein the network information is exchanged using email service provided by the network.

13. The VoIP method according to claim 1, wherein the VoIP connection is established by sending and receiving Session Initiation Protocol (SIP) packets according to the exchanged network information.

14. The VoIP method according to claim 1, wherein the first device and the second device are dual mode mobile phones that can connect with both the internet base network and the network.

15. The VoIP method according to claim 1, wherein the network is a WLAN or LAN network.

16. The VoIP method according to claim 1, wherein the network is a GSM, GPRS, EDGE, CDMA or WCDMA communication network.

17. A Voice over Internet Protocol (VoIP) system, comprising:

a first device;

a second device;

an internet based network, wherein the first device and the second device respectively have a network information corresponding to the internet based network; and

a network for exchanging the network information between the first device and the second device;

wherein a VoIP connection between the first device and the second device through the internet based network according to the exchanged network information is established.

18. The VoIP system according to claim 17, wherein the network information comprises an IP address and a port number.

19. The VoIP system according to claim 17, wherein the first device sends a query instant message carrying the network information of the first device to the second device, and the second device replies with a response instant message carrying the network information of the second device to the first device when receiving the query instant message from the first device.

20. The VoIP system according to claim 19, wherein the query instant message and the response instant message respectively comprise a user name, a user phone number, an IP address and a port number.

21. The VoIP system according to claim 19, wherein the first device sends a signaling invite request to the second device when receiving the response instant message from the second device, the second device sends a signaling confirm to the first device when the second device accepts the signaling invite request, and the first device replies with a signaling acknowledgement to the second device when receiving the signaling confirm from the second device to start the VOIP connection.

22. The VoIP system according to claim 17, wherein the network information of the second device is stored in at least one database, the first device sends a signaling query through the internet based network to the second device according to the network information of the second device stored in the database, and validates the network information of the second device stored in the database if a signaling response replied by the second device is received.

23. The VoIP system according to claim 22, wherein the first device further deletes the network information of the second device from the database if no signaling response is received.

24. The VoIP system according to claim 22, wherein the signaling query carries the network information of the first device, and the signaling response carries the network information of the second device.

25. The VoIP system according to claim 22, wherein the first device sends a signaling update through the internet based network to the second device according to the network information of the second device stored in the database when the network information of the first device is changed, wherein the signaling update carries the updated network information of the first device.

26. The VoIP system according to claim 22, wherein before establishing the VoIP connection, the first device checks whether the network information of the second device is in the database, if yes, the first device directly takes the network information of the second device in the database as the exchanged network information.

27. The VoIP system according to claim 17, wherein the network information is exchanged using short message service (SMS), Multimedia Messaging Service (MMS), or Instant Messaging and Presence Services (IMPS) provided by the network.

28. The VoIP system according to claim 17, wherein the network information is exchanged using email service provided by the network.

29. The VoIP system according to claim 17, wherein the VoIP connection is established by sending and receiving Session Initiation Protocol (SIP) packets according to the exchanged network information.

30. The VoIP system according to claim 17, wherein the first device and the second device are dual mode mobile phones that can connect with both the internet base network and the network.

31. The VoIP system according to claim 17, wherein the network is a WLAN or LAN network.

32. The VoIP system according to claim 17, wherein the network is a GSM, GPRS, EDGE, CDMA or WCDMA communication network.

33. The VoIP system according to claim 17, wherein the network further comprises a Short Message Service Center (SMSC) for exchanging the network information using short message service (SMS).

34. The VoIP system according to claim 17, wherein the first and second devices connect to the internet based network through a wireless local area network (WLAN).

35. The VoIP system according to claim 17, further comprises a first Access Point (AP) and a second AP, and the first and second mobile devices connect to the Internet based network via the first AP and the second AP respectively.

36. The VoIP system according to claim 17, further comprises a first base station (BS) and a second BS, and the first and second devices connect to the network via the first BS and the second BS respectively.

37. A communication system of Voice over Internet Protocol (VoIP), comprising:

a first mobile device;

a second mobile device, wherein the fist mobile device and the second mobile device respectively have a network information corresponding to an internet based network; and

a message service center, for sending and receiving messages of the first and the second mobile devices;

wherein the first and second mobile devices exchange the network information by sending and receiving messages through the message service center, and establishes a VoIP connection through the internet based network according to the exchanged network information.

38. The communication system of VoIP according to claim 37, wherein the message service center is provided by a personal communication network.

39. The communication system of VoIP according to claim 37, wherein the message service center is provided by an internet based network.