Methods and system for fast session establishment between equipment using H.324 and related telecommunications protocols

• US 20060029041A1
• Filed: 09/03/2004
• Published: 02/09/2006
• Est. Priority Date: 12/12/2002
• Status: Active Grant

• Current Assignee: RPX Corporation
• Original Assignee: Dilithium Networks
• Inventors: Wong, Albert, Jongbloed, Robert, Jabri, Marwan A.
• Granted Patent: US 7,206,316 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 80/00 Wireless network protocols or protocol adaptations to wireless operation
• CPC Class Codes: H04W 84/04 Large scale networks; Deep hierarchical networks

Abstract

Methods of establishing multimedia telecommunication (a multimedia “call”) between equipment (“terminals”). More particularly, the invention provides methods for reducing the time required to establish calls between terminals that implement the ITU-T H.324 Recommendation and other Standards and Recommendations derived from or related to this such as the 3G-324M recommendation developed and adopted by the Third Generation Partnership Projects (3GPP and 3GPP2). More specifically, it relates to: (i) a method and apparatus for concatenating the H.245 messages that are required to pass between the terminals at the start of the call to establish the capabilities of both terminals and agree on the type and format of media and data to be exchanged; (ii) a method and apparatus for using non-standard H.245 messages or standard H.245 messages with non-standard fields to accelerate such establishment; (iii) a method and apparatus of informing each terminal of the capabilities of the other and proposing the type and format of media and data to be exchanged by means of any user-defined fields that are inserted in the call signaling protocol that is used for bearer establishment prior to the start of the H.324 stage of the call; and (iv) a method and apparatus of informing each terminal of the capabilities of the other and proposing and accepting the type and format of media and data to be exchanged by means of a burst of bits optionally encoded for error control on the bearer channel as soon as it is desired, preferably as the first information transmitted on the bearer channel.

Claims

1. A method of processing a call between users with reduced call set-up times using one or more telecommunication networks, the method being provided between at least a pair of H.324-like terminals coupled to the one or more telecommunication networks, the method comprising:

providing one or more preferences for a call associated with a first terminal and a second terminal, the one or more preferences being associated with an initial mode of operation for the call between the first terminal and the second terminal;

processing the one or more preferences as a Custom Message;

establishing a bearer channel between the first terminal and the second terminal after a call signaling process;

transferring the Custom Message from the first terminal to the second terminal through a telecommunication network using the bearer channel;

processing the Custom Message by the second terminal;

transferring a Custom Response Message by the second terminal using one or more response messages to indicate to the first terminal the initial mode of operation; and

exchanging information between the first terminal and the second terminal after the initial mode of operation has been established.

2. The method of claim 1 wherein the information comprises voice and video.

3. The method of claim 1 wherein the information comprises voice.

4. The method of claim 1 wherein the information comprises data.

5. The method of claim 1 wherein the information comprises video.

6. The method of claim 1 wherein the one or more preferences is associated with an ITU-T ASN.1 custom message.

7. The method of claim 1 wherein the one or more preferences is provided in a table, the table being stored in one or more memories.

8. The method of claim 1 wherein the one or more preferences is coded as an index from a plurality of indices into a table of a plurality of predefined preferences modes, wherein the one or more preferences is retrieved from the table by at least one of the terminals.

9. The method of claim 1 wherein the first terminal is an H.324-like gateway.

10. The method of claim 1 wherein the first terminal is selected from a H.324-like handset, H.324-like a gateway;

or H.324 like a server.

11. The method of claim 1 wherein the second terminal is an H.324-like gateway.

12. The method of claim 1 wherein the second terminal is selected from a H.324-like handset, H.324-like a gateway, or H.325 a server.

13. The method of claim 1 further comprising repeating the transferring of the Custom Message from the first terminal to the second terminal and processing the Custom Message by the second terminal for at least N times, where N is 1 or greater;

and repeating transferring of the Custom Response Message from the second terminal to the first terminal for at least M times, where M is equal to N.

14. The method of claim 1 wherein the Custom Response Message is an indication that at least one of the one or more preferences has been received by the second terminal.

15. The method of claim 14 wherein at least one preference is a preferred mode of operation of the second terminal.

16. The method of claim 1 further comprising repeating the transferring of the Custom Message from the first terminal to the second terminal and processing the Custom Message by the second terminal for at least N times, where N is 1 or greater, to enhance detectability of the one or more preferences by the second terminal.

17. The method of claim 1 further comprising repeating the transferring of the Custom Message from the first terminal to the second terminal before the initial mode of operation has been established and processing the Custom Message by the second terminal for at least N times, where N is 1 or greater.

18. The method of claim 1 further comprising establishing a standard mode of operation between the first terminal and the second terminal if the initial mode of operation associated with the Custom Message has not been established between the first terminal and the second terminal.

19. A system for processing a call between users with reduced call set-up times using one or more telecommunication networks, the system comprising:

one or more memories, the one or more memories comprising;

code directed to providing one or more preferences for a call associated with a first terminal and a second terminal, the one or more preferences being associated with an initial mode of operation for the call between a first terminal and a second terminal;

code directed to processing the one or more preferences as a Custom Message;

code directed to establishing a bearer channel between the first terminal and the second terminal; and

code directed to transferring the Custom Message from the first terminal to the second terminal through a telecommunication network using the bearer channel.

20. The system of claim 19 wherein the one or more memories further comprises:

code directed to processing the Custom Message by the second terminal;

code directed to transferring a Custom Response Message by the second terminal using one or more response messages to indicate to the first terminal the initial mode of operation.

21. The system of claim 19 wherein the one or more memories further comprises:

code directed to exchanging information between the first terminal and the second terminal after the initial mode of operation has been established.

22. The system of claim 19 wherein the first terminal is selected from a H.324-like handset, H.324-like a gateway, or H.324 like a server.

23. The system of claim 19 wherein the first terminal is selected from a H.324-like handset, H.324-like a gateway, or H.324 like a server.

24. The system of claim 19 wherein the information comprises at least voice, data, or video.

25. A method of processing a call between users with reduced call set-up times using one or more telecommunication networks, the method being provided between at least a pair of H.324-like terminals coupled to the one or more telecommunication networks, the method comprising:

providing one or more preferences for a call associated with a first terminal and a second terminal, the one or more preferences being associated with an initial mode of operation for the call between the first terminal and the second terminal;

processing the one or more preferences as a Custom Message;

establishing a bearer channel between the first terminal and the second terminal;

transferring the Custom Message using one or more messages from the first terminal to the second terminal through a telecommunication network using the bearer channel;

processing the Custom Message by the second terminal;

accepting at least one preference in the Custom Message by the second terminal;

transferring a Custom Response Message by the second terminal using one or more response messages to indicate to the first terminal that the initial mode of operation including the at least one preference has been accepted; and

exchanging information between the first terminal and the second terminal after the initial mode of operation has been established.

26. A method of processing a call between users with reduced call set-up times using one or more telecommunication networks, the method being provided between at least a pair of H.324-like terminals coupled to the one or more telecommunication networks, the method comprising:

providing one or more preferences for a call associated with a first terminal and a second terminal, the one or more preferences being associated with an initial mode of operation for the call between the first terminal and the second terminal;

processing the one or more preferences as a first Custom Message;

processing the one or more preferences as a second Custom Message;

establishing a bearer channel between the first terminal and the second terminal after a call signaling process;

determining whether the first terminal or the second terminal becomes a decision making terminal for selecting at least one preferred mode to be used by the first terminal and the second terminal;

identifying either the first terminal or the second terminal as the decision making terminal while the other terminal becomes an accepting terminal;

transferring the first Custom Message from the decision making terminal to the accepting terminal through a telecommunication network using the bearer channel;

processing the first Custom Message by the accepting terminal;

transferring the second Custom Message from the accepting terminal to the decision making terminal through the telecommunication network using the bearer channel;

accepting at least one preference in the second Custom Message by the accepting terminal;

exchanging information between the decision making terminal and the accepting terminal after the initial mode of operation has been established.

27. The method of claim 26 wherein the determining of the decision making terminal is provided by a pre-established process.

28. The method of claim 27 wherein the pre-established process selects either the first terminal or the second terminal as the decision making terminal.

29. The method of claim 26 wherein the determining of the decision making terminal is provided by information in the Custom Message.

30. The method of claim 29 further comprising determining if a conflict exists in whether the first terminal or the second terminal is the decision making terminal and then determining the decision making terminal by a pre-established process.

31. A method of processing a call between users with reduced call set-up times using one or more telecommunication networks, the method being provided between at least a pair of H.324-like terminals coupled to the one or more telecommunication networks, the method comprising:

providing one or more first preferences associated with a first preference mode for a call associated with a first terminal and a second terminal, the one or more first preferences being associated with an initial mode of operation for the call between the first terminal and the second terminal;

processing the one or more preferences as a first Custom Message;

embedding the first Custom Message in a predetermined field of one or more messages of a call signaling message;

establishing a bearer channel between the first terminal and the second terminal;

transferring the first Custom Message from the first terminal to the second terminal through a telecommunication network using the bearer channel during a call signaling phase;

processing the first Custom Message by the second terminal;

determining if the first Custom Message associated with the first preference mode is supported by the second terminal; and

transferring a first Custom Response Message by the second terminal using a call signaling response message to the first terminal to indicate if the first preference mode has been accepted by the second terminal.

32. The method of claim 31 further comprising performing a second process for call set up if the first preference mode is not recognized or is not supported or has not been accepted by the second terminal, the second process comprising:

processing one or more second preferences associated with a second preference mode as a second Custom Message;

establishing a bearer channel between the first terminal and the second terminal;

transferring the second Custom Message from the first terminal to the second terminal through a telecommunication network using the bearer channel;

processing the second Custom Message by the second terminal;

transferring a second Custom Response Message by the second terminal using one or more second response messages to the first terminal to indicate if the second preference mode has been supported by the second terminal.

33. The method of claim 32 further comprising performing a third process for call set up if the second preference mode has not been supported by the second terminal, the third process comprising:

processing one or more custom Non-Standard H.245 messages or custom Non Standard fields in standard messages, the one or more custom Non-Standard H.245 messages or custom Non-Standard fields in standard messages being associated with a third initial predetermined mode of operation;

transferring the one or more custom Non-Standard H.245 messages or custom Non Standard fields in standard messages through a telecommunication network using the bearer channel from the first terminal to the second terminal;

processing the one or more custom Non-Standard H.245 messages or custom Non Standard fields in standard messages by the second terminal;

transferring a Custom Non-Standard response message associated with the one or more custom Non-Standard H.245 messages or custom Non-Standard fields in standard messages from the second terminal to the first terminal to indicate if the third initial predetermined mode of operation has been supported by the second terminal.

34. The method of claim 33 further comprising performing a fourth process for call set up if the third initial predetermined mode of operation has not been supported by the second terminal, the fourth process comprising:

determining a common mobile level;

determining two or more H.245 messages associated with a set-up parameters for an initial fourth predetermined mode of operation;

concatenating the two or more H.245 messages into at least one SRP frame, the one SRP frame being characterized by a predetermined size of the SRP command frame;

transmitting the SRP command frame, including the two H.245 messages, from the first terminal to the second terminal through a telecommunication network; and

transmitting an SRP acknowledge message from the second terminal to the first terminal indicate if the initial fourth predetermined mode of operation has been supported by the second terminal.

35. The method of claim 34 further comprising operating the first terminal and the second terminal in a standard mode of operation if the initial fourth predetermined mode of operation has not been supported by the second terminal.

36. A method of processing a call between users with reduced call set-up times using one or more telecommunication networks, the method being provided between at least a pair of H.324-like terminals coupled to the one or more telecommunication networks, the method comprising:

providing one or more preferences for a call associated with a first terminal and a second terminal, the one or more preferences being associated with an initial mode of operation for the call between the first terminal and the second terminal;

processing the one or more preferences as a Custom Message;

establishing a bearer channel between the first terminal and the second terminal after a call signaling process;

transferring the Custom Message from the first terminal to the second terminal through a telecommunication network using the bearer channel;

processing the Custom Message by the second terminal; and

exchanging information between the first terminal and the second terminal after the initial mode of operation has been established.

37. A method of initiating a set up process for a call between users with reduced set-up times using one or more 3G telecommunication networks, the method being provided between at least a pair of H.324-like terminals coupled to the one or more 3G telecommunication networks, the method comprising:

providing one or more preferences for a call between a first terminal and a second terminal, the one or more preferences being associated with one or more modes of operation for the call between the first terminal and the second terminal;

processing the one or more preferences as a message;

establishing a bearer channel between the first terminal and the second terminal after a call signaling process; and

transferring the message from the first terminal to the second terminal through a portion of a telecommunication network using the bearer channel, the portion of the telecommunication network being capable of transmitting at least voice, video, and data.

38. The method of claim 37 wherein the one or more modes of operation is predetermined.

39. The method of claim 37 wherein the one or more modes of operation is determined.

40. The method of claim 37 wherein the one or more modes of operation is predefined.

41. The method of claim 37 wherein the one or more modes of operation is explicit.

42. The method of claim 37 wherein the one or more messages is one or more Custom messages.

43. The method of claim 37 wherein the one or more messages is one or more non-standard messages.

44. The method of claim 37 wherein the one or more 3G networks is a 3GPP network.

45. The method of claim 37 wherein the one or more 3G networks is a 3GPP2 network.

46. The method of claim 37 further comprising processing the one or more messages by the second terminal;

and

transferring one or more response messages by the second terminal using one or more response messages to indicate to the first terminal the one or more modes of operation.

47. The method of claim 46 further comprising exchanging information between the first terminal and the second terminal after an initial mode of operation has been established.

48. A system for processing a call between users with reduced call set-up times using one or more telecommunication networks, the system comprising:

one or more memories, the one or more memories comprising;

code directed to providing one or more preferences for a call associated with a first terminal and a second terminal, the one or more preferences being associated with a predetermined mode of operation for the call between a first terminal and a second terminal;

code directed to processing the one or more preferences as a Custom Message;

code directed to establishing a bearer channel between the first terminal and the second terminal; and

code directed to transferring the Custom Message from the first terminal to the second terminal through a telecommunication network using the bearer channel.

49. The system of claim 48 wherein the one or more memories further comprises:

code directed to processing the Custom Message by the second terminal; and

code directed to transferring a Custom Response Message by the second terminal using one or more response messages to indicate to the first terminal the predetermined mode of operation.

50. The system of claim 48 wherein the one or more memories further comprises:

code directed to exchanging information between the first terminal and the second terminal after the initial mode of operation has been established.

51. A method of processing a call between users with reduced call set-up times using one or more mobile telecommunication networks, the method being provided between at least a pair of H.324-like terminals coupled to the one or more mobile telecommunication networks, the method comprising:

providing one or more preferences for a call associated with a first terminal and a second terminal, the one or more preferences being associated with a predetermined mode of operation for the call between the first terminal and the second terminal;

processing the one or more preferences as a message;

establishing a bearer channel between the first terminal and the second terminal after a call signaling process; and

transferring the message from the first terminal to the second terminal through a telecommunication network using the bearer channel.

52. The method of claim 51 wherein the message is a Custom Message.

53. The method of claim 52 further comprising processing the Custom Message by the second terminal;

and

exchanging information between the first terminal and the second terminal after the initial mode of operation has been established.

54. A method of processing a call between users with reduced call set-up times using one or more telecommunication networks, the method being provided between at least a pair of H.324-like terminals coupled to the one or more telecommunication networks, the one or more telecommunication networks being capable of transferring at least voice, video, and data, the method comprising:

providing one or more preferences for a call associated with a first 3G terminal and a second 3G terminal, the one or more preferences being associated with a predetermined mode of operation for the call between the first 3G terminal and the second 3G terminal;

processing the one or more preferences as a Custom Message;

establishing a bearer channel between the first 3G terminal and the second 3G terminal after a call signaling process; and

transferring the Custom Message from the first 3G terminal to the second 3G terminal through a 3G telecommunication network using the bearer channel.

55. A mobile communication terminal capable of transferring at least voice, video, and data and processing a call between users with reduced call set-up times using one or more telecommunication networks, the mobile communication terminal comprising one or more computer memories, the one or more computer memories including:

one or more codes directed to providing one or more preferences for a call between the mobile communication terminal and another terminal, the one or more preferences being associated with one or more modes of operation for the call;

one or more codes directed to processing the one or more preferences to provide at least one message;

one or more codes directed to establishing a bearer channel between the mobile communication terminal and the other terminal after a call signaling process; and

one or more codes directed to transferring the message from the mobile communication terminal to the other terminal through at least a portion of a telecommunication network using the bearer channel, the portion of the telecommunication network being capable of transmitting at least data.

56. The terminal of claim 55 wherein the terminal is a mobile handset.

57. The terminal of claim 55 wherein the terminal is a gateway coupled to the 3G telecommunication network.

58. The terminal of claim 55 wherein the one or more modes of operation is related to one or more predetermined modes of operation.

59. The terminal of claim 55 wherein the terminal is terminal equipment.

60. The terminal of claim 55 wherein the telecommunication network is capable of transmitting voice and video.