Apparatus and method for terminating service emulation instances

• US 8,218,569 B2
• Filed: 06/01/2004
• Issued: 07/10/2012
• Est. Priority Date: 04/05/2004
• Status: Active Grant

• Current Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Original Assignee: Verizon Business Global LLC (Verizon Communications Inc.)
• Inventors: DelRegno, Nick, Kotrla, Scott R., McDysan, David E., Bencheck, Michael U., Turlington, Matthew W., Hardin, Ross S., Schell, Richard C., Chiu, Howard, Drake, William
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): Kao, Jutai
• Application Number:
  US10/858,491
• Publication Number:
  US 20050226215A1
• Time in Patent Office: 2,961 Days
• Field of Search: None
• US Class Current: 370/466
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42

Abstract

System and method for providing a termination point for service emulation instances in an access network is provided. In an embodiment, the service emulation instances are implemented utilizing, for example, pseudowires. Communications to and from the access network are aggregated and transmitted via one or more pseudowires to a service emulation instance terminator. The service emulation instance terminator converts the traffic to its native form and, if necessary, converts the traffic to a different type of format or service. The service emulation instance terminator then frames the traffic for the appropriate type of service and transmits the traffic to the service edge. Traffic received from the service is removed prepended with a pseudowire label and aggregated with other traffic. The aggregated traffic is transmitted to the customer via the access network. If necessary, an interworking function may convert the traffic from one type of service to another type of service.

Claims

1. An apparatus for processing service emulation communications on a customer side of an access network prior to transmission through a service edge, wherein service emulation communications to and from the access network are aggregated, comprising:

a service emulation interface for receiving service emulation communications, each of the service emulation communications comprising a service emulation instance payload that may differ in format from service emulation instance payloads of other service emulation communications, and at least one service emulation mapping identifier including at least the identification of the service emulation instance, the service emulation mapping identifiers of the service emulation communication having a uniform format;

a service emulation end point component communicatively coupled to the service emulation interface, the service emulation end point component being configured to convert the service emulation communications to communications conforming to a first transport protocol; and

an interworking function separate from and communicatively coupled to the service emulation end point component configured to convert the communications conforming to a first transport protocol to communications conforming to a second transport protocol, the first transport protocol being different fro the second transport protocol;

wherein the interworking function sends the communications conforming to the second transport protocol to the service edge.

2. The apparatus of claim 1, wherein the first transport protocol is Frame Relay and the second transport protocol is Ethernet.

3. The apparatus of claim 1, wherein the first transport protocol is Ethernet and the second transport is Frame Relay.

4. The apparatus of claim 1, wherein the service emulation interface receives service emulation communications from a customer via an access network.

5. The apparatus of claim 1, wherein the interworking function sends the communications conforming to the second transport protocol to the service edge via a framer.

6. The apparatus of claim 1, further comprising a framer communicatively coupled to the interworking function and communicatively coupled to the service edge, the framer being configured to transmit communications conforming to the second transport protocol on a communications link.

7. The apparatus of claim 1, wherein the service emulation communications are received via a pseudowire.

8. The apparatus of claim 1, wherein the service emulation end point component terminates one or more pseudowires within a tunnel.

9. The apparatus of claim 8, wherein the tunnel is a label switched path.

10. The apparatus of claim 1, further comprising a controller configured to invoke the interworking function in response to receipt of an indication that the first transport protocol is different than the second transport.

11. The apparatus of claim 10, wherein the indication is received from a network management system.

12. An apparatus for processing service emulation communications on a custom side of an access network prior to transmission through a service edge, where service emulation communications to and from the access network are aggregated, the apparatus comprising:

a service emulation interface communicatively coupled to a user of a first transport protocol, the service emulation interface being configured to receive the service emulation communications, wherein the service emulation communications comprise at least one service emulation mapping identifier including at least the identification of a service emulation instance, the service emulation mapping identifiers of the service emulation communications having a uniform format;

a service emulation end point component communicatively coupled to the service emulation interface, the service emulation end point component being configured to extract service emulation instance payload from a service emulation communications; and

an interworking function, separate from and communicatively coupled to the service emulation end point component, the interworking function being configured to convert the service emulation instance payload conforming to the first transport protocol to communications conforming to a second transport protocol, wherein the first transport protocol is different from the second transport protocol; and

wherein the interworking function sends the communications conforming to the second transport protocol to the service edge.

13. The apparatus of claim 12, wherein the service emulation interface is communicatively coupled to the user via an access network.

14. The apparatus of claim 12, wherein the interworking function is communicatively coupled to a framer configured for framing the communications in accordance with the second transport protocol.

15. The apparatus of claim 14, wherein the interworking function is communicatively coupled to a service edge via the framer.

16. The apparatus of claim 12, wherein the first transport protocol is Frame Relay and the second transport is Ethernet.

17. The apparatus of claim 12, wherein the first transport protocol is Ethernet and the second transport is Frame Relay.

18. The apparatus of claim 12, wherein the service emulation instance is a pseudowire.

19. The apparatus of claim 12, wherein the service emulation end point component terminates one or more pseudowires within a tunnel.

20. The apparatus of claim 19, wherein the tunnel is a label switched path.

21. The apparatus of claim 12, further comprising a controller configured to invoke the interworking function in response to receipt of an indication that the first transport protocol is different than the second transport protocol.

22. The apparatus of claim 21, wherein the indication is received from a network management system.

23. An apparatus for processing service emulation communications having one or more service emulation instances, on a customer side of an access network prior to transmission through a service edge, wherein the service emulation communications to and from the access network are aggregated, and wherein the service emulation communications comprise at least one service emulation mapping identifier for identifying a service emulation instance, the service emulation mapping identifiers having a uniform format, the apparatus comprising:

means for terminating a service emulation instance;

means for extracting a service emulation instance payload from the service emulation instance, the service emulation instance payload conforming to a first transport protocol;

means, separate from the means for extracting, for converging the service emulation communications from the first transport protocol to communications conforming to a second transport protocol, wherein the first transport protocol is different from the second transport protocol; and

means for communicatively coupling to a service edge the means for converting.

24. The apparatus of claim 23, further comprising means for framing the communications in accordance with the second transport protocol.

25. The apparatus of claim 23, further comprising means for communicatively coupling to an access network the means for terminating.

26. The apparatus of claim 23, wherein the first transport protocol is Frame Relay and the second transport protocol is Ethernet.

27. The apparatus of claim 23, wherein the first transport protocol is Ethernet and the second transport protocol is Frame Relay.

28. The apparatus of claim 23, wherein the service emulation instance is a pseudowire.

29. The apparatus of claim 23, further comprising means for invoking the means for converting upon receipt of an indication that the first transport protocol is different than the second transport protocol.

30. The method of claim 29, wherein the means for invoking receives the indication from a network management system.

31. An apparatus for processing service emulation communications on a customer side of a service edge, wherein the service emulation communications are aggregated, the apparatus comprising:

an interworking function communicatively coupled to a service edge, the interworking function being configured to convert communications conforming to a first transport protocol to communications conforming to a second transport protocol, the first transport protocol being different from the second transport protocol;

a service emulation end point component communicatively separate from and coupled to the interworking function, the service emulation end point component being configured to encode communications conforming to the second transport protocol into service emulation communications, wherein the service emulation communications comprise at least one service emulation mapping identifier for identifying a service emulation instance and a service emulation instance payload, the service emulation mapping identifiers having a uniform format while the format of the service emulation instance payload may differ; and

a service emulation interface communicatively coupled to the service emulation end point component and an access network, the service emulation interface being configure to transmit service emulation communications on a service emulation instance.

32. The apparatus of claim 31, wherein the interworking function is communicatively coupled to the service edge via a framer, the framer being configured for extracting the communications from frames associated with the second transport protocol.

33. The apparatus of claim 31, wherein the first transport protocol is Frame Relay and the second transport protocol is Ethernet.

34. The apparatus of claim 31, wherein the first transport protocol is Ethernet and the second transport protocol is Frame Relay.

35. The apparatus of claim 31, wherein the service emulation instance is a pseudowire.

36. The apparatus of claim 31, wherein the service emulation end point component terminates one or more pseudowires within a tunnel.

37. The apparatus of claim 35, wherein the tunnel is a label switched path.

38. The apparatus of claim 31, further comprising a controller configured to invoke the interworking function in response to receipt of an indication that the first transport protocol is different than the second transport protocol.

39. The apparatus of claim 38, wherein the indication is received from a network management system.

40. An apparatus for processing service emulation communications on a customer side of an access network, wherein the service emulation communications to and from the access network are aggregated, the apparatus comprising:

a pseudowire terminator communicatively coupled to an access network, the pseudowire terminator being configured to act as one end of a pseudowire to receive communications corresponding to a first transport protocol, the communications comprising a service emulation mapping identifier having a uniform format for identifying a service emulation instance and a service emulation instance payload;

a framer communicatively coupled to a service edge and the pseudowire terminator, the framer being configured to insert framing data prior to transmission to the service edge; and

an interworking function communicatively coupled to the pseudowire terminator and the framer, the interworking function configured to covert from communications received via the pseudowire terminator conforming to the first transport protocol to communications conforming to a second transport protocol suitable for framing by the framer.

41. The apparatus of claim 40, wherein the first transport protocol is Frame Relay and the second transport protocol is Ethernet.

42. The apparatus of claim 40, wherein the first transport protocol is Ethernet and the second transport protocol is Frame Relay.

43. The apparatus of claim 40, further comprising a controller configured to invoke the interworking function in response to receipt of an indication that the first transport protocol is different than the second transport protocol.

44. The apparatus of claim 43, wherein the indication is received from a network management system.

45. The apparatus of claim 40, wherein the pseudowire terminator terminates one or more pseudowires within a tunnel.

46. The apparatus of claim 45, wherein the tunnel is a label switched path.

47. The apparatus of claim 40, wherein the communications received by the pseudowire terminator comprise a plurality of service emulation mapping identifiers having uniform format for identifying service emulation instances and a service emulation instance payload.

48. An apparatus for processing and aggregating service emulation communication on a customer side of an access network, the apparatus comprising:

a framer communicatively coupled to a service edge, the framer being configured to extract communications conforming to a first transport protocol;

a pseudowire terminator communicatively coupled to an access network and the framer, the pseudowire terminator being configured to act as one end of a pseudowire to transmit the communications on an pseudowire, the communications comprising a service emulation mapping identifier having a uniform format for identifying a service emulation instance and a service emulation instance payload; and

an interworking function communicatively coupled to the pseudowire terminator and the framer, the interworking function configured to convert from communications received via the framer conforming to the first transport protocol to communication conforming to a second transport protocol suitable for transmission by the pseudowire terminator.

49. The apparatus of claim 48, wherein the first transport protocol is Frame Relay and the second transport protocol is Ethernet.

50. The apparatus of claim 48, wherein the first transport protocol is Ethernet and the second transport protocol is Frame Relay.

51. The apparatus of claim 48, further comprising a controller configured to invoke the interworking function in response to receipt of an indication that the first transport protocol is different than the second transport protocol.

52. The apparatus of claim 51, wherein the indication is received from a network management system.

53. The apparatus of claim 48, wherein the pseudowire terminator terminates one or more pseudowires within a tunnel.

54. The apparatus of claim 53, wherein the tunnel is a label switched path.

55. The apparatus of claim 48, wherein the communications transmitted by the pseudowire terminator comprise a plurality of service emulation mapping identifiers having a uniform format for identifying service emulation instances and a service emulation instance payload.

56. A method for processing and aggregating service emulation communications on a customer side of an access network, comprising:

receiving communications in a first format associated with a first transport protocol;

removing framing information associated with the first transport protocol;

converting the communications to a second format corresponding to a second transport protocol;

encoding the communications in the second format to form service emulation communications, wherein the encoding includes prepending at least one service emulation instance mapping identifier for identifying a service emulation instance, wherein the service emulation instance mapping identifiers are of uniform format regardless of the format of the communication to which it is prepended; and

transmitting the service emulation communications over a service emulation instance.

57. The method of claim 56, wherein the encoding includes prepending a tunnel label.

58. The method of claim 56, wherein the service emulation instance is a pseudowire.

59. The method of claim 56, wherein the receiving includes receiving communications from a service edge.

60. The method of claim 56, wherein the transmitting includes transmitting the service emulation communications to a customer via an access network.

61. The method of claim 56, wherein the first transport protocol is Frame Relay and the second transport protocol is Ethernet.

62. The method of claim 56, wherein the first transport protocol is Ethernet and the second transport protocol is Frame Relay.

63. The method of claim 56, wherein the converting is in response to receipt of an indication that the first transport protocol is different than the second transport protocol.

64. The method of claim 63, wherein the indication is received from a network management system.

65. A non-transitory computer readable medium encoded with computer program codes, which when executed, perform processing and aggregating of service emulation communications on a customer side of an access network prior to transmission through a service edge, the computer program comprising:

computer program code for receiving service emulation communications on a service emulation instance from a customer via an access network, an decapsulating the service emulation communications by removing at least one service emulation instance mapping identifier identifying the service emulation instance, wherein the service emulation instance mapping identifiers are of uniform format regardless of the format of the communication to which it is attached, the service emulation communications comprising a service emulation payload corresponding to a first transport protocol;

computer program code for converting the service emulation instance payload to a second format corresponding to a second transport protocol, the first transport protocol being different from the second transport protocol; and

computer program code for transmitting the service emulation instance payload in the second format to the service edge on a communications link corresponding to the second transport protocol.

66. The non-transitory computer readable medium of claim 65, wherein the computer program code for decapsulating includes computer program code for removing a tunnel label.

67. The non-transitory computer readable medium of claim 65, wherein the service emulation instance is pseudowire.

68. The non-transitory computer readable medium of claim 65, wherein the service emulation instance is a pseudowire within a tunnel.

69. The non-transitory computer readable medium of claim 65, wherein the first transport protocol is Frame Relay and the second transport protocol is Ethernet.

70. The non-transitory computer readable medium of claim 65, wherein the first transport protocol is Ethernet and the second transport protocol is Frame Relay.

71. The non-transitory computer readable medium of claim 65, further comprising computer program code for associating the service emulation instance with a port communicatively coupled to the service edge.

72. The non-transitory computer readable medium of claim 71, wherein the computer program code for associating comprises computer program code for dynamically receiving associations via a network management system.

73. The non-transitory computer readable medium of claim 65, further comprising computer program code for framing the communications for transmission on the second transport protocol.

74. The non-transitory computer readable medium of claim 65, wherein the computer program code for converting is performed in response to a receipt of an indication that the first transport protocol is different than the second transport protocol.

75. The non-transitory computer readable medium of claim 74, wherein the indication is received from a network management system.

76. A non-transitory computer readable medium encoded with computer program codes, which when executed, perform processing and aggregation of service emulation communications on a customer side of an access network, the computer program comprising:

computer program code for receiving communications in a first format associated with a first transport protocol;

computer program code for removing framing information associated with the first transport protocol;

computer program code for converting the communications to a second format corresponding to a second transport protocol;

computer program code for encoding the communications in the second format to form service emulation communications, the encoding including prepending at least one service emulation instance mapping identifier for identifying a service emulation instance, wherein the service emulation instance mapping identifiers are of uniform format regardless of the format of the communication to which it is prepended; and

computer program code for transmitting the service emulation communications over a service emulation instance.

77. The non-transitory computer readable medium of claim 76, wherein the computer program code for encoding includes computer program code prepending a tunnel label.

78. The non-transitory computer readable medium of claim 76, wherein the service emulation instance is a pseudowire.

79. The non-transitory computer readable medium of claim 76, wherein the computer program code for receiving include computer program code receiving communications fro a service edge.

80. The non-transitory computer readable medium of claim 76, wherein the computer program for transmitting include computer program code transmitting the service emulation communications to a customer via an access network.

81. The non-transitory computer readable medium of claim 76, wherein the first transport protocol is Frame Relay and the second transport protocol is Ethernet.

82. The non-transitory computer readable medium of claim 76, wherein the first transport protocol is Ethernet and the second transport protocol is Frame Relay.

83. The non-transitory computer readable medium of claim 76, wherein the computer program code for converting is performed in response to a receipt of an indication that the first transport protocol is different than the second transport protocol.

84. The non-transitory computer readable medium of claim 83, wherein the indication in received from a network management system.