Automatic Connectivity Adaptation of Packet Traffic in a Transport Network

• US 20080259795A1
• Filed: 10/18/2006
• Published: 10/23/2008
• Est. Priority Date: 10/18/2005
• Status: Abandoned Application

• Current Assignee: Ericsson AB (Telefonaktiebolaget LM Ericsson)
• Original Assignee: Ericsson AB (Telefonaktiebolaget LM Ericsson)
• Inventors: Sessarego, Piergiorgio, Fiaschi, Giovanni
• Application Number:
  US12/090,652
• Publication Number:
  US 20080259795A1
• Time in Patent Office: Days
• US Class Current: 370/232
• CPC Class Codes: H04J 3/1611 Synchronous digital hierarchy [SDH] or SONET H04J3/1664 takes precedence for interactions with OTN
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/11 Identifying congestion
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 47/25 with rate being modified by the source upon detecting a change of network conditions

Abstract

A method for automatic adaptation of connectivity by means of virtual concatenation groups of packet traffic in a circuit switched transport network in which an estimate of the packet traffic is made and the band available between packet interfaces which engage the transport network is increased or decreased by creation or removal of virtual concatenation circuits according to the necessities indicated by the estimate.

Claims

1-13. -13. (canceled)

14. A method of automatically adapting packet traffic connectivity using a circuit switched transport network, the method comprising:

estimating an amount of packet data traffic; and

based on the estimation, creating or removing virtual concatenation circuits to increase or decrease available bandwidth between packet interface functions engaging the circuit switched transport network.

15. The method of claim 14 further comprising:

configuring the packet interface functions between a Local Area Network (LAN) and the circuit switched transport network, to interface a framing and mapping function, a virtual concatenation function, and a circuit set-up/tear-down function for an automatic control plane; and

controlling a capacity adjustment function via the virtual concatenation function to create or remove the virtual concatenation circuits responsive to receiving requests from a traffic estimator at the circuit set-up/tear-down function.

16. The method of claim 14 wherein the estimated amount of packet data traffic is based on a traffic measurement.

17. The method of claim 14 wherein the estimated amount of packet data traffic is based on advance estimated bandwidth necessity requests for packet traffic.

18. The method of claim 15 wherein the circuit set-up/tear-down function for the automatic control plane comprises an Automatic Switched Transport Network (ASTN).

19. The method of claim 15 wherein the capability adjustment function comprises a Link Capacity Adjustment Scheme (LCAS) function.

20. The method of claim 15 wherein the virtual concatenation function comprises a Virtual Concatenation (VCAT) function.

21. The method of claim 15 wherein the framing and mapping function comprises a Generic Framing Procedure (GFP) function.

22. The method of claim 15 wherein the framing and mapping function comprises a Packet over SONET (POS) function with Point-to-Point Protocol/High-level Data Link Control (PPP/HDLC).

23. The method of claim 14 wherein the circuit switched transport network comprises a Synchronous Digital Hierarchy (SDH) network.

24. The method of claim 14 wherein the circuit switched transport network comprises a Synchronous Optical Network (SONET).

25. The method of claim 14 wherein the circuit switched transport network comprises a Optical Transport Network (OTN).

26. A packet data network having routers and/or switches that are interconnected by a circuit switched transport network, the packet data network comprising:

a traffic estimator function configured to estimate an amount of packet data traffic; and

a capacity adjustment function configured to create or remove virtual concatenation circuits to increase or decrease available bandwidth between packet interface functions engaging the circuit switched transport network.

27. The network of claim 26 wherein the packet interface functions are configured between a Local Area Network (LAN) and the circuit switched transport network, to interface a framing and mapping function, a virtual concatenation function, and a circuit set-up/tear-down function for an automatic control plane, and wherein the circuit set-up/tear-down function is configured to control the capacity adjustment function via the virtual concatenation function responsive to receiving requests from the traffic estimator.

28. The network of claim 26 wherein the traffic estimator is configured to estimate the amount of packet data traffic based on a traffic measurement.

29. The network of claim 26 wherein the traffic estimator is configured to estimate the amount of packet data traffic based on advance estimated bandwidth necessity requests for packet data traffic.

30. The network of claim 27 wherein the circuit set-up/tear-down function for the automatic control plane comprises an Automatic Switched Transport Network (ASTN).

31. The network of claim 26 wherein the capability adjustment function comprises a Link Capacity Adjustment Scheme (LCAS) function.

32. The network of claim 27 wherein the virtual concatenation function comprises a Virtual Concatenation (VCAT) function.

33. The network of claim 27 wherein the framing and mapping function comprises a Generic Framing Procedure (GFP) function.

34. The network of claim 27 wherein the framing and mapping function comprises a Packet over SONET (POS) function with Point-to-Point Protocol/High-level Data Link Control (PPP/HDLC).

35. The network of claim 26 wherein the circuit switched transport network comprises a Synchronous Digital Hierarchy (SDH) network.

36. The network of claim 26 wherein the circuit switched transport network comprises a Synchronous Optical Network (SONET).

37. The network of claim 26 wherein the circuit switched transport network comprises a Optical Transport Network (OTN).