TRANSMISSION METHOD OF MULTIMEDIA DATA OVER A NETWORK

• US 20040158606A1
• Filed: 04/08/2003
• Published: 08/12/2004
• Est. Priority Date: 02/10/2003
• Status: Abandoned Application

• Current Assignee: ADV Communications Limited
• Original Assignee: ADV Communications Limited
• Inventors: Tsai, Mingtar
• Application Number:
  US10/249,435
• Publication Number:
  US 20040158606A1
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: H04L 61/2567 for reachability, e.g. inquiring the address of a correspondent behind a NAT server
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related

Abstract

A system and method to allow multimedia (voice and video) data communication to pass through enterprise firewalls and proxy, which include network address translator (NAT). The system also includes servers to redirect voice/video data packets to other VoIP standard conforming servers. The redirect server sends command and data either using transmission control protocol (TCP) or user datagram protocol (UDP), depending on the configuration and protocol requirements of each server. This method is compatible with the existing communication standards, such as ITU H.323, session initiation protocol (SIP), media gateway control protocol (MGCP) and media gateway control (MEGACO).

Claims

1. A transmission method for multimedia data through a network, the method comprising:

a first endpoint sending a first command to a redirect server through a first network filter with a first data transmission protocol, wherein the redirect server obtains information of the first endpoint and saves the information therein;

the redirect server sending the first command to a server and receiving a first in response to the first command from the server;

the redirect server sending the first response to the first endpoint, thereby the transmission for multimedia data through the first endpoint and the server is established there.

2. The transmission method of multimedia data according to claim 1, wherein the redirect server is a redirect signal server.

3. The transmission method of multimedia data according to claim 1, wherein the redirect server is a redirect media server.

4. The transmission method of multimedia data according to claim 1, wherein server includes a signal server.

5. The transmission method of multimedia data according to claim 4, wherein the signal server is a H.323 Gatekeeper.

6. The transmission method of multimedia data according to claim 4, wherein the signal server is a session initiation protocol (SIP) Proxy server.

7. The transmission method of multimedia data according to claim 4, wherein the signal server is a media gateway control protocol (MGCP) callagent server.

8. The transmission method of multimedia data according to claim 4, wherein the signal server is media gateway control (MEGACO) callagent server.

9. The transmission method of multimedia data according to claim 4, wherein the server further includes a media server.

10. The transmission method of multimedia data according to claim 9, wherein the media server is a software-based telephony gateway.

11. The transmission method of multimedia data according to claim 9, wherein the media server is a voice/video over internet protocol (VoIP) compliant telephony gateway, wherein the VoIP compliant telephony gateway is a device for translating VoIP signals into signals that can be understood by a phone system.

12. The transmission method of multimedia data according to claim 9, wherein a real-time transport protocol (RTP) is being supported in the communication between the signal server and the media server.

13. The transmission method of multimedia data according to claim 1, wherein the first data transmission protocol is a transmission control protocol (TCP).

14. The transmission method of multimedia data according to claim 1, wherein the multimedia data is voice or video data.

15. The transmission method of multimedia data according to claim 1, wherein the first network filter is an enterprise firewall.

16. The transmission method of multimedia data according to claim 1, wherein the first network filter is a network address translator (NAT).

17. The transmission method of multimedia data according to claim 1, wherein the first network filter is a proxy server.

18. The transmission method of multimedia data according to claim 1, further comprising:

a second endpoint sending a second command to the redirect server through a second network filter with a second data transmission protocol, wherein the redirect server obtains information of the second endpoint and saves the information therein;

the redirect server sending the second command to the server and receiving a second response to the second command from the server;

the redirect server sending the second response to the second endpoint, thereby the transmission for multimedia data through the second endpoint and the server is established there.

19. The transmission method of multimedia data according to claim 18, wherein the multimedia data is transferred between the first endpoint and the second endpoint, the redirect server, and the server according to the saved information of the first endpoint and the second endpoint, without having to reconfigure the first network and the second network filters nor requiring the opening of a special port for the transmission.

20. The transmission method of multimedia data according to claim 19, wherein a real-time transport protocol (RTP) is being supported in the server.

21. The transmission method of multimedia data according to claim 19, wherein the multimedia data transferred between the first endpoint and the second endpoint, the redirect server, and the server transmission protocol is TCP.

22. The transmission method of multimedia data according to claim 19, wherein the multimedia data transferred between the first endpoint and the second endpoint, the redirect server, and the server transmission protocol is a user datagram protocol (UDP).

23. The transmission method of multimedia data according to claim 1, wherein the information of the first endpoint is an IP address and a port number of the first endpoint.

24. The transmission method of multimedia data according to claim 1, wherein the IP address is a public IP address or a private IP address.

26. The transmission method of multimedia data according to claim 18, wherein the multimedia data is transferred between the first endpoint and the second endpoint, the redirect server, and the server according to the saved information of the first endpoint and the second endpoint, without having to reconfigure the first network and the second network filters nor requiring the opening of a special port for the transmission.

25. A transmission method for multimedia data through a network, the method comprising:

a first endpoint sending a command to an inside redirect server through a first signal server via a data transmission protocol;

the inside redirect server forwarding the command to a second redirect server via a first network filter;

the second redirect server sending the command to a second signal server for processing and receiving the processed command from the second signal server;

the second redirect server sending the processed command to a third redirect server via a second network filter;

the third redirect server sending the processed command to a third signal server;

the third signal server sending the command to a second endpoint;

the first endpoint sending multimedia data to a first media server via a standard multimedia data transmission protocol;

the first media server sending the multimedia data to the first redirect server;

the first redirect server sending the multimedia data to the second redirect server via the first network filter;

the second redirect server sending the multimedia data to a second media server for processing;

the second media server returning the processed multimedia data to the second redirect server;

the second redirect server sending the processed multimedia data to the third redirect server via the first network filter;

the third redirect server sending the processed multimedia data to a third media server; and

the third media server sending the processed multimedia data to the second endpoint, thereby the transmission for multimedia data through the second endpoint and the server is established there.

27. A system for transmitting multimedia data between a endpoint and a network server through a redirect server, the system comprising:

a first transmission path, for the endpoint to send a first command to the redirect server through a first network filter with a first data transmission protocol, wherein the redirect server obtains information of the first endpoint and saves the information therein;

a second transmission path, for the redirect server to send the command to the network server and receiving a first response to the first command from the network server; and

a multimedia data transmission path, being established when the redirect server sending the first response to the first endpoint, thereby the multimedia data transmission path allows the transmission for multimedia data through the first endpoint and the network server.

28. The system of claim 27, wherein the redirect server is a redirect signal server.

29. The system of claim 27, wherein the redirect server is a redirect media server.

30. The system of claim 27, wherein the network server includes a signal server.

31. The system of claim 27, wherein the signal server is a H.323 Gatekeeper, a session initiation protocol (SIP) Proxy server, a media gateway control protocol (MGCP) callagent server, or a media gateway control (MEGACO) callagent server.

32. The system of claim 30, wherein the server further includes a media server.

33. The system of claim 32, wherein the media server is a software-based telephony gateway.

34. The system of claim 32, wherein the media server is a voice/video over internet protocol (VoIP) compliant telephony gateway, wherein the VoIP compliant telephony gateway is a device for translating VoIP signals into signals that can be understood by a phone system.

35. The system of claim 32, wherein a real-time transport protocol (RTP) is being supported in the communication between the endpoint and the media server.