System and method for SONET NSAP addressing

• US 20060098642A1
• Filed: 11/05/2004
• Published: 05/11/2006
• Est. Priority Date: 11/05/2004
• Status: Active Grant

• Current Assignee: Sbc Knowledge Ventures, L.P.
• Original Assignee: Sbc Knowledge Ventures, L.P.
• Inventors: Mallya, Arvind R., Bruner, Rodney, Rele, Amit
• Granted Patent: US 7,433,362 B2
• Time in Patent Office: Days
• US Class Current: 370/389
• CPC Class Codes: H04J 2203/0053 Routing
• CPC Class Codes: H04J 3/12 Arrangements providing for calling or supervisory signals
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00

Abstract

A synchronous optical network (SONET) system having multi-hierarchal network service access point (NSAP) addressing includes a plurality of network elements (NEs) electrically linked, and a first level routing area and a second level routing area that each includee at least one NE. The NEs include devices having respective NSAP addresses and at least one of the NEs is a network controller that controls the SONET. The first level routing area and the second level routing area are based on a predetermined prioritization of the NEs as first level NEs and second level NEs, and have a first level routing and have a second level routing for the NSAP addresses, respectively, and each of the areas is capable of having at least 151 NEs.

Claims

1. A synchronous optical network (SONET) system having multi-hierarchal network service access point (NSAP) addressing, the system comprising:

a plurality of network elements (NEs) electrically linked, wherein the NEs comprise devices having respective NSAP addresses and at least one of the NEs is a network controller that controls the SONET; and

a first level routing area and a second level routing area that each comprise at least one NE, wherein the first level routing area and the second level routing area are based on a predetermined prioritization of the NEs as first level NEs and second level NEs, and having a first level routing and having a second level routing for the NSAP addresses, respectively, and each of the areas is capable of having at least 151 NEs.

2. The system of claim 1 wherein the first level routing provides intra-area connectivity and communication between respective first level and second level NEs within each one of the areas, and the second level routing provides connectivity and communication between second level NEs in the areas and between second level NEs within each one of the areas.

3. The system of claim 1 wherein the NE that controls the SONET is a second level NE, and at least one other of the second level NEs is a backup controller.

4. The system of claim 1 further comprising at least one span of control map for defining the second level routing areas that includes transitions across the first and second level routing areas, and at least one of the span of control maps conforms to geographic routing areas.

5. The system of claim 4 wherein pre-existing geography-based area NSAP addresses are converted to addressing assignments of claim 1 within a predetermined duration of time to avoid prolonged service disruption.

6. The system of claim 1 wherein the second level routing areas are generated, and the NEs are consolidated to reduce the total number of NEs in the SONET such that first level routing area sizes are reduced to a minimum.

7. The system of claim 1 wherein each NSAP address has an RDI field filled with the first two octets of a respective Internet protocol (IP) address, and an Area field filled with the last two octets of the respective IP address.

8. The system of claim 1 wherein a unique ORG id field value is obtained from an appropriate assigning authority, and the ORG id field value is assigned in the respective NSAP addresses.

9. The system of claim 1 wherein the NSAP addresses are generated in response to at least one predetermined criteria including server type.

10. A method of generating a multi-hierarchal synchronous optical network (SONET) having network service access point (NSAP) addresses, the method comprising:

electrically linking a plurality of network elements (NEs) to form a plurality of areas that comprise at least one NE, wherein the NEs comprise devices having respective NSAP addresses and at least one of the NEs is a network controller that controls the SONET, and each of the areas is capable of having at least 151 NEs; and

generating a prioritization for the NSAP addresses as having a first level routing and as having a second level routing and defining the areas as a first level routing area and a second level routing area, respectively, based on a predetermined prioritization of the NEs as first level NEs and second level NEs, respectively.

11. The method of claim 10 wherein the first level routing provides intra-area connectivity and communication between respective first level and second level NEs within each one of the areas, and the second level routing provides connectivity and communication between second level NEs in the areas and between second level NEs within each one of the areas.

12. The method of claim 10 wherein the NE that controls the SONET is a second level NE, and at least one other of the second level NEs is a backup controller.

13. The method of claim 10 further comprising generating at least one span of control map for defining the second level routing areas that includes transitions across the first and second level routing areas, and at least one of the span of control maps conforms to geographic routing areas.

14. The method of claim 13 further comprising converting pre-existing geography-based area NSAP addresses to addressing assignments of claim 10 within a predetermined duration of time to avoid prolonged service disruption.

15. The method of claim 10 further comprising generating the second level routing areas such that first level routing area sizes are reduced to a minimum.

16. The method of claim 10 further comprising consolidating NEs to reduce the total number of NEs in the SONET.

17. The method of claim 10 wherein each NSAP address has an RDI field filled with the first two octets of a respective Internet protocol (IP) address, and an Area field filled with the last two octets of the respective IP address.

18. The method of claim 10 further comprising obtaining a unique ORG id field value from an appropriate assigning authority, and assigning the ORG id field value in the respective NSAP addresses.

19. The method of claim 10 further comprising generating the NSAP addresses in response to at least one predetermined criteria including server type.

20. A multi-hierarchal synchronous optical network (SONET) network, the network comprising:

a plurality of network elements (NEs) electrically linked, wherein the NEs comprise devices having respective network service access point (NSAP) addresses and at least one of the NEs is a network controller that controls the SONET; and

a first level routing area and a second level routing area that each comprise at least one NE, wherein the first level routing area and the second level routing area are based on a predetermined prioritization of the NEs as first level NEs and second level NEs, and having a first level routing and having a second level routing for the NSAP addresses, respectively, and each of the areas is capable of having at least 151 NEs, the first level routing provides intra-area connectivity and communication between respective first level and second level NEs within each one of the areas, and the second level routing provides connectivity and communication between second level NEs in the areas and between second level NEs within each one of the areas, and the NE that controls the SONET is a second level NE, and at least one other of the second level NEs is a backup controller.