VLAN numbering in access networks

• US 8,340,107 B2
• Filed: 02/04/2008
• Issued: 12/25/2012
• Est. Priority Date: 02/05/2007
• Status: Active Grant

• Current Assignee: Koninklijke KPN NV
• Original Assignee: Koninklijke KPN NV
• Inventors: Luthra, Vinod, De Boer, Alexander Peter
• Primary Examiner(s): Weidner, Timothy J
• Application Number:
  US12/012,605
• Publication Number:
  US 20080186980A1
• Time in Patent Office: 1,786 Days
• Field of Search: None
• US Class Current: 370/401
• CPC Class Codes: H04L 12/4641 Virtual LANs, VLANs, e.g. virtual private networks [VPN] LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 41/0806 for initial configuration or provisioning, e.g. plug-and-play
• CPC Class Codes: H04L 41/0889 Techniques to speed-up the configuration process
• CPC Class Codes: H04L 49/20 Support for services
• CPC Class Codes: H04L 61/2596 Translation of addresses of the same type other than IP, e.g. translation from MAC to MAC addresses
• CPC Class Codes: H04L 61/50 Address allocation

Abstract

VLAN numbering in access networks which bi-directionally connect subscribers and service providers. For an outgoing packet flowing in a direction from a network side to a subscriber side through a network terminator (NT), a port number appearing in a packet header on the network side is not copied by the NT into a header of a corresponding packet applied to the subscriber side, but the NT copies VLAN numbers for the services from the former to the latter packet headers. All services from one specific service provider are delivered to the subscriber through one specific physical port on the subscriber side which corresponds to the port number. For incoming packet flow from the subscriber side into the network side, the NT inserts a port number into a header of a packet applied to the network side, corresponding to the physical port on the NT at which an associated packet was received on the subscriber side, with NT copying the VLAN numbers for the services from the header of the subscriber-side packet into that of the network-side packet.

Claims

1. A network terminating device adapted for use in an access network, the network supporting virtual local area networks (VLANs) on network and subscriber sides of the device and facilitating communication between service providers, connected to the network, and a subscriber, wherein:

in the access network, different services from different ones of the service providers are delivered to the subscriber as traffic over the network flowing to the subscriber, the traffic being delivered through one or more ports on the device to the subscriber, and with each one of the ports having a physical port number; and

the VLANs separate traffic from different ones of the service providers, each of the VLANs having an associated VLAN numbering with the VLAN numbering on the network and subscriber sides having a structure comprising a port number part and a service number part, wherein the service number part on the network and subscriber sides comprises a service number differentiating the different services provided by at least one of the service providers while the port number part comprises a port number on the network side and has the port number stripped on the subscriber side;

the device comprising;

means for translating the VLAN numbering appearing in the traffic on the network side and flowing in a direction of the subscriber side by stripping the port number from the port number part but preserving the service number in the service number part so as to define the VLAN numbering on the subscriber side; and

a separate physical one of the ports through which the services are to be delivered to the subscriber side and which corresponds with the port number in the VLAN numbering on the network side.

2. The network terminating device recited in claim 1 wherein the device delivers all of the services from a specific one of the service providers to the subscriber through a specific one of the physical ports on the subscriber side of the device, said specific one of the physical ports having a specific port number which corresponds with, on the network side, the port number in said VLAN numbering in the traffic flowing to the subscriber.

3. The network terminating device recited in claim 1 wherein the translating means copies the service numbers of the VLAN numbering on the network side into the service number of the VLAN numbering on the subscriber side for the services delivered at the subscriber side.

4. The network terminating device recited in claim 1 wherein the port number and the service number have a numerical bit structure, and wherein the translating means sets bits of the port number in either the VLAN numbering or a VLAN tag to zero.

5. The network terminating device recited in claim 1 wherein the port number and the service number have a numerical bit structure, and wherein the service number is divided into at least two service number blocks.

6. The network terminating device recited in claim 5 wherein at least one of the service number blocks provides traffic separation.

7. The network terminating device recited in claim 6 wherein the traffic separation distinguishes among different classes of service.

8. The network terminating device recited in claim 7 wherein the network terminating device uses a different traffic queue for each class of service, said different traffic queue being handled by the device with a different priority.

9. The network terminating device recited in claim 8 wherein the device supports quality of service for traffic flowing in a direction from the subscriber side to the network side.

10. The network terminating device recited in claim 8 wherein the device supports quality of service for traffic flowing in a direction from the network side to the subscriber side.

11. A network terminating device adapted for use in an access network, the network supporting virtual local area networks (VLANs) on network and subscriber sides of the device and facilitating communication between service providers, connected to the network, and a subscribers, wherein:

in the access network, different services from different ones of the service providers are delivered to the subscribers as traffic over the network flowing to the subscriber, the traffic being delivered through one or more ports on the device to the subscriber, and with each one of the ports having a physical port number; and

the VLANs separate traffic from different ones of the service providers, each of the VLANs having an associated VLAN numbering with the VLAN numbering on the network and subscriber sides having a structure comprising a port number part and a service number part, wherein the service number part on the network and subscriber sides comprises a service number differentiating the different services provided by at least one of the service providers while the port number part comprises a port number on the network side and has the port number stripped on the subscriber side;

the device comprising;

means for translating the VLAN numbering appearing in traffic on the subscriber side and flowing in a direction of the network side by adding a given port number, wherein the given port number corresponds with a particular physical port through which the services are to be delivered to the subscriber side, to the port number part and preserving the service number in the service number part so as to define translated VLAN numbering on the network side; and

a connection, on the network side, which carries traffic appearing at the network side and flowing from the device to the network side with the traffic appearing at the network side containing the translated VLAN numbering.

12. The network terminating device recited in claim 11 wherein the translating means copies the service numbers from the VLAN numbering for the services delivered at the subscriber side into the service numbers in the VLAN numbering in the traffic appearing at the network side.

13. The network terminating device recited in claim 11 wherein the given port number and the service number have a numerical bit structure, and wherein the translating means sets bits of the given port number in the VLAN numbering on the network side to a value that corresponds with the particular physical port number at the subscriber side.

14. An access network having network and subscriber sides, which supports virtual local area networks (VLANs) on the network and subscriber sides for facilitating communication between service providers and a subscribers, wherein different services from different service providers are delivered to the subscribers as traffic flowing over the network and delivered through one or more ports on the subscriber side to the subscriber, with each of the ports having a physical port number, the network comprising:

a plurality of VLANs for separating traffic from the different service providers, each of the VLANs having an associated VLAN numbering with the VLAN numbering on the network and subscriber sides having a structure comprising a port number part and a service number part, wherein the service number part on the network and subscriber sides comprises a service number differentiating the different services provided by at least one of the service providers while the port number part comprises a port number on the network side and has the port number stripped on the subscriber side; and

a network terminating device, connected to the VLANs in both the network and the subscriber sides, the device comprising;

means for translating the VLAN numbering appearing in the traffic on the network side and flowing in a direction to the subscriber side by stripping the port number from the port number part but preserving the service number in the service number part so as to define the VLAN numbering on the subscriber side; and

a separate physical one of the ports through which the services are to be delivered to the subscriber side and which corresponds with the port number in the VLAN numbering on the network side.

15. An access network having network and subscriber sides, which supports virtual local area networks (VLANs) on the network and subscriber sides for facilitating communication between service providers and a subscribers, wherein different services from different service providers are delivered to the subscribers as traffic flowing over the network and delivered through one or more ports on the subscriber side to the subscriber, with each of the ports having a physical port number, the network comprising:

a plurality of VLANs for separating traffic from the different service providers, each of the VLANs having an associated VLAN numbering with the VLAN numbering on the network and subscriber sides having a structure comprising a port number part and a service number part, wherein the service number part on the network and subscriber sides comprises a service number differentiating the different services provided by at least one of the service providers while the port number part comprises a port number on the network side and has the port number stripped on the subscriber side; and

a network terminating device, connected to the VLANs in both the network and the subscriber sides, the device comprising;

means for translating the VLAN numbering appearing in traffic on the subscriber side and flowing in a direction of the network side by adding a given port number, wherein the given port number corresponds with a particular physical port through which the services are to be delivered to the subscriber side, to the port number part and preserving the service number in the service number part so as to define translated VLAN numbering on the network side; and

a connection, on the network side, which carries traffic appearing at the network side and flowing from the device to the network side with the traffic appearing at the network side containing the translated VLAN numbering.

16. A method for facilitating communication between service providers and a subscribers in a multiple service provider access network, the network having network and subscriber sides and supporting virtual local area networks (VLANs) on the network and subscriber sides, the method comprising the steps of:

providing different services from different ones of the service providers to the subscribers as traffic over the network delivered through one or more ports on the subscriber side, with each of the ports having a physical port number;

separating, through a plurality of VLANs, traffic from the different service providers, each of the VLANs having an associated VLAN numbering with the VLAN numbering on the network and subscriber sides having a structure comprising a port number part and a service number part, wherein the service number part on the network and subscriber sides comprises a service number differentiating the different services provided by at least one of the service providers while the port number part comprises a port number on the network side and has the port number stripped on the subscriber side;

translating the VLAN numbering appearing in the traffic on the network side and flowing in a direction of the subscriber side by stripping the port number from the port number part but preserving the service number in the service number part so as to define the VLAN numbering on the subscriber side; and

delivering the services to the subscriber side through a separate physical one of the ports which corresponds with the port number in the VLAN numbering on the network side.

17. A method for facilitating communication between service providers and a subscriber in a multiple service provider access network, the network having network and subscriber sides and supporting virtual local area networks (VLANs) on the network and subscriber sides, the method comprising the steps of:

providing different services from different ones of the service providers to the subscribers as traffic over the network delivered through one or more ports on the subscriber side, with each of the ports having a physical port number;

separating, through a plurality of VLANs, traffic from the different service providers, each of the VLANs having an associated VLAN numbering with the VLAN numbering on the network and subscriber sides having a structure comprising a port number part and a service number part, wherein the service number part on the network and subscriber sides comprises a service number differentiating the different services provided by at least one of the service providers while the port number part comprises a port number on the network side and has the port number stripped on the subscriber side;

translating the VLAN numbering appearing in traffic on the subscriber side and flowing in a direction of the network side by adding a given port number, wherein the given port number corresponds with a particular physical port through which the services are to be delivered to the subscriber side, to the port number part and preserving the service number in the service number part so as to define translated VLAN numbering on the network side; and

carrying traffic, appearing at the network side and flowing from a device to the network side, through a connection on the network side of the device with the traffic appearing at the network side containing the translated VLAN numbering.