Trans-compression selection and configuration in modem over packet networks

• US 7,177,944 B1
• Filed: 08/27/2002
• Issued: 02/13/2007
• Est. Priority Date: 04/13/2002
• Status: Expired due to Fees

• Current Assignee: MACOM Technology Solutions Holdings, Inc.
• Original Assignee: Mindspeed Technologies Inc. (MACOM Technology Solutions Holdings, Inc.)
• Inventors: Chu, Keith, Kandiah, Skantha, Chen, Zhihui
• Primary Examiner(s): Wiley, David
• Assistant Examiner(s): NEURAUTER, GEORGE C
• Application Number:
  US10/229,439
• Time in Patent Office: 1,631 Days
• Field of Search: 370352-356, 370400-401, 379/900, 709220-222, 709227-228, 709/237, 709/249
• US Class Current: 709/237
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: Y10S 379/90 Internet, e.g. Internet phone, webphone, internet-based telephony

Abstract

An apparatus and method for configuring a gateway device for a modem over packet network session is disclosed. For example, a system may include a first gateway device coupled to a first client device and a second gateway device coupled to a second client device, where the first gateway device is coupled to the second gateway device over a packet network. The trans-compression types and capabilities of the first and second gateway devices are determined and used to generate a set of negotiation parameters. The first gateway device then negotiates with the first client device using the negotiation parameters to select a first compression algorithm. A second compression algorithm selected between the second gateway device and the second client devices is also determined by the first gateway device. Then, the trans-compression mode of operation of the first gateway device is configured based on the trans-compression types and capabilities of the first and second gateway devices and the selected first and second compression algorithms. The second gateway device may be similarly configured.

Claims

1. A method for configuring a first gateway device, said first gateway device communicatively coupled to a first client device and a second gateway device, said second gateway device communicatively coupled to a second client device, said method comprising:

determining a first trans-compression type of said first gateway device;

receiving, from said second gateway, a second trans-compression type of said second gateway device;

generating first negotiation parameters for said first gateway device based on said first and second trans-compression types; and

negotiating using said first negotiation parameters with said first client device to select a first compression algorithm.

2. The method of claim 1, further comprising:

receiving a second compression algorithm selected between said second gateway device and said second client device; and

configuring said first gateway device based on said first and second trans-compression types and said first and second compression algorithms.

3. The method of claim 2, further comprising preventing data exchange between said first and second client devices until after said configuring said first gateway device.

4. The method of claim 1 further comprising:

determining first trans-compression capabilities of said first gateway device; and

receiving, from said second gateway, second trans-compression capabilities of said second gateway device,

wherein said generating said first negotiation parameters for said first gateway device is based on said first and second trans-compression types and said first and second trans-compression capabilities.

5. The method of claim 1, wherein each of said first and second trans-compression types are at least one of:

no trans-compression (“

NTCX”

), single trans-compression (“

STCX”

), or double trans-compression (“

DTCX”

).

6. The method of claim 5, wherein said first negotiation parameters are defined according to whether at least one of said first and second gateway devices is of said DTCX type.

7. The method of claim 6, further comprising:

determining first trans-compression capabilities of said first gateway device; and

receiving, from said second gateway, second trans-compression capabilities of said second gateway device,

wherein said first negotiation parameters are defined as a maximum gateway compression capabilities of said first and said second gateway devices if both of said first and said second gateway devices are of said DTCX type.

8. The method of claim 7, wherein said maximum compression capabilities comprises the highest gateway compression capabilities between said first and second gateway devices.

9. The method of claim 7, wherein said maximum compression capabilities comprises the highest gateway compression capabilities by combining the compression capabilities of said first and second gateway devices.

10. The method of claim 6, further comprising:

determining first trans-compression capabilities of said first gateway device; and

receiving, from said second gateway, second trans-compression capabilities of said second gateway device,

wherein said first negotiation parameters are defined as the gateway compression capabilities of the one of said first and said second gateway devices which is of said DTCX type if one of said first and said second gateway devices is of said DTCX type but the other of said first and said second gateway devices is not of said DTCX type.

11. The method of claim 5, further comprising:

receiving a second compression algorithm selected between said second gateway device and said second client device; and

configuring said first gateway device based on said first and second trans-compression types and said first and second compression algorithms,

wherein said first gateway device is configured according to whether at least one of said first and second gateway devices is of said DTCX type.

12. The method of claim 11, further comprising:

determining first trans-compression capabilities of said first gateway device; and

receiving, from said second gateway, second trans-compression capabilities of said second gateway device,

wherein, if at least one of said first and second gateway devices is of said DTCX type, said first gateway device is configured to use said highest common gateway compression between said first and second gateway devices according to a first criteria, said first criteria satisfied if;

said second gateway device is of said DTCX type,

said compression capabilities of said first gateway device is a superset of said first compression algorithm,

said compression capabilities of said second gateway device is a superset of said second compression algorithm, and

said first gateway device and said second gateway device are able to negotiate a higher degree compression algorithm than said first compression algorithm.

13. The method of claim 12, wherein if said first criteria is not satisfied, said first gateway device is then configured to disable trans-compression between said first gateway and said second gateway according to a second criteria, said second criteria satisfied if said second client device is capable of decompressing compressed data sent by said first client device to said first gateway device.

14. The method of claim 13, wherein if both said first and second criteria are not satisfied, said first gateway device is then configured to:

decompress data received from said first client device,

compress said decompressed data according to said second compression algorithm, and

transmit said newly compressed data to said second gateway device, according to a third criteria, said third criteria satisfied if said first gateway device is capable of compressing data in accordance with said second compression algorithm.

15. The method of claim 14, wherein if each of said first, second and third criteria are not satisfied, said first gateway device is then configured to transmit data sent to said first gateway device by said first client device to said second gateway device.

16. The method of claim 5, wherein said first negotiation parameters are defined according to whether both of said first and second gateway devices are of said STCX type.

17. The method of claim 16, further comprising:

determining first trans-compression capabilities of said first gateway device; and

receiving, from said second gateway, second trans-compression capabilities of said second gateway device,

wherein said first negotiation parameters are defined as the common gateway compression capabilities between said first and said second gateway devices according to a first criteria, said first criteria satisfied if;

both of said first and said second gateway devices are of said STCX type,

said first and said second gateway devices have a common gateway compression capability, and

neither of said first and said second gateway devices are of said DTCX type.

18. The method of claim 17, wherein said first negotiation parameters are defined as the gateway compression capabilities of said first gateway device according to a second criteria, said second criteria satisfied if:

both of said first and said second gateway devices are of said STCX type,

said first and said second gateway devices do not have a common gateway compression capability, and

neither of said first and said second gateway devices are of said DTCX type.

19. The method of claim 18, further comprising:

receiving a second compression algorithm selected between said second gateway device and said second client device; and

configuring said first gateway device based on said first and second trans-compression types and said first and second compression algorithms,

wherein if said second criteria is satisfied, said first gateway device is configured to;

decompress data received from said first client device, and

transmit said uncompressed data to said second gateway device.

20. The method of claim 17, further comprising:

receiving a second compression algorithm selected between said second gateway device and said second client device; and

configuring said first gateway device based on said first and second trans-compression types and said first and second compression algorithms,

wherein if said first criteria is satisfied, said first gateway device is configured to transmit data received from said first client device to said second gateway device.

21. The method of claim 20, wherein if said first criteria is satisfied, said first gateway device is further configured to:

receive data from said second gateway device,

decompress said received data,

compress said uncompressed data using said first compression algorithm, and

transmit said newly compressed data to said first client device.

22. The method of claim 5, wherein said first negotiation parameters are configured to a default set according to a first criteria, said first criteria satisfied if:

at least one of said first and second gateway devices is not of said STCX type, and

neither of said first and said second gateway devices are of said DTCX type.

23. The method of claim 22, wherein said default set of negotiation parameters comprises V.42bis with 1 K dictionary size and a maximum string size of thirty two.

24. The method of claim 22, wherein if said first criteria is satisfied, said first gateway device is configured to forward data received from said first client device to said second gateway device if said first and second compression algorithms are the same.

25. The method of claim 22, wherein if said first criteria is not satisfied, said first gateway device is configured to disconnect connection between said first client and said first gateway if said first and second compression algorithms are not the same.

26. The method of claim 1, wherein said first client device is communicatively coupled to said first gateway device via a telephone connection, said second client device communicatively coupled to said second gateway device via another telephone connection, said first gateway device communicatively coupled to said second gateway device via a packet network.

27. The method of claim 1, further comprising performing compression negotiation by said first gateway device with said first client device for a compression protocol supported by said second gateway device, but not by said first gateway device.

28. A first gateway device, said first gateway device communicatively coupled to a first client device and a second gateway device, said second gateway device communicatively coupled to a second client device, said first gateway device comprising:

a controller configured to determine a first trans-compression type of said first gateway device;

a receiver coupled to said controller and configured to receive, from said second gateway, a second trans-compression type of said second gateway device; and

a transmitter coupled to said controller, said controller further configured to generate first negotiation parameters for said first gateway device based on said first and second trans-compression types, said transmitter configured to negotiate with said first client device to select a first compression algorithm using said first negotiation parameters.

29. The first gateway device of claim 28, wherein said receiver is further configured to receive a second compression algorithm selected between said second gateway device and said second client device, said controller further configured to configure said first gateway device based on said first and second trans-compression types and said first and second compression algorithms.

30. The first gateway device of claim 29, wherein said controller is further configured to prevent data exchange between said first and second client devices until after said first gateway device is configured.

31. The first gateway device of claim 28, wherein said controller is further configured to:

determine first trans-compression capabilities of said first gateway device, and

receive, from said second gateway, second trans-compression capabilities of said second gateway device,

wherein first negotiation parameters are based on said first and second trans-compression types and said first and second trans-compression capabilities.

32. The first gateway device of claim 28, wherein each of said first and second trans-compression types are at least one of:

no trans-compression (“

NTCX”

), single trans-compression (“

STCX”

), or double trans-compression (“

DTCX”

).

33. The first gateway device of claim 28, wherein said first client device is communicatively coupled to said first gateway device via a telephone connection, said second client device communicatively coupled to said second gateway device via another telephone connection, said first gateway device communicatively coupled to said second gateway device via a packet network.

34. The first gateway device of claim 28, wherein said controller is further to perform compression negotiation with said first client device for a compression protocol supported by said second gateway device but not by said first gateway device.

35. A computer readable storage medium having a computer program for use by a first gateway device, said first gateway device communicatively coupled to a first client device and a second gateway device, said second gateway device communicatively coupled to a second client device, said computer program comprising:

code for determining a first trans-compression type of said first gateway device;

code for receiving, from said second gateway, a second trans-compression type of said second gateway device;

code for generating first negotiation parameters for said first gateway device based on said first and second trans-compression types; and

code for negotiating using said first negotiation parameters with said first client device to select a first compression algorithm.

36. The computer readable storage medium of claim 35, said computer program further comprising:

code for receiving a second compression algorithm selected between said second gateway device and said second client device; and

code for configuring said first gateway device based on said first and second trans-compression types and said first and second compression algorithms.

37. The computer readable storage medium of claim 36, said computer program further comprising code for preventing data exchange between said first and second client devices until after said code for configuring configures said first gateway device.

38. The computer readable storage medium of claim 35, said computer program further comprising:

code for determining first trans-compression capabilities of said first gateway device; and

code for receiving, from said second gateway, second trans-compression capabilities of said second gateway device,

wherein said code for generating generates said first negotiation parameters for said first gateway device is based on said first and second trans-compression types and said first and second trans-compression capabilities.

39. The computer readable storage medium of claim 35, wherein each of said first and second trans-compression types are at least one of:

no trans-compression (“

NTCX”

), single trans-compression (“

STCX”

), or double trans-compression (“

DTCX”

).

40. The computer readable storage medium of claim 35, wherein said first client device is communicatively coupled to said first gateway device via a telephone connection, said second client device communicatively coupled to said second gateway device via another telephone connection, said first gateway device communicatively coupled to said second gateway device via a packet network.

41. The computer readable storage medium of claim 35, wherein said computer program further comprises code for performing compression negotiation by said first gateway device with said first client device for a compression protocol supported by said second gateway device but not by said first gateway device.