Continuous Virtual Private Local Area Network (LAN) Service (VPLS) Over Wireline and Wireless Networks

• US 20130308617A1
• Filed: 05/16/2012
• Published: 11/21/2013
• Est. Priority Date: 05/16/2012
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Chuah, Pei Ling, Ngoo, Yik Shaw, Poon, Zing Yee
• Application Number:
  US13/472,954
• Publication Number:
  US 20130308617A1
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 45/50 using label swapping, e.g. multi-protocol label switch [MPLS]
• CPC Class Codes: H04W 40/00 Communication routing or communication path finding
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A mechanism is provided for enabling virtual private local area network (LAN) service (VPLS) service within a base station (NodeB/eNodeB). A wireless signal is received from a mobile device. The wireless signal is converted into one or more internet protocol (IP) packets. A VPLS virtual private network (VPN) multiprotocol label switching (MPLS) label is constructed in a header of each IP packet. An egress router is identified for the IP packets. A MPLS label of the egress router is constructed for MPLS routing. The MPLS label is added on top of the VPLS VPN MPLS label in the header of each IP packet. The one or more IP packets are then forwarded to at least one other router within a MPLS network.

Claims

1. A method, in a data processing system, for enabling virtual private local area network (LAN) service (VPLS) service within a base station (NodeB/eNodeB), the method comprising:

receiving, by a first processor within a router of the base station, a wireless signal from a mobile device;

converting, by the first processor, the wireless signal into one or more internet protocol (IP) packets;

constructing, by the first processor, a VPLS virtual private network (VPN) multiprotocol label switching (MPLS) label in a header of each IP packet;

identifying, by the first processor, an egress router for the IP packets;

constructing, by the first processor, a MPLS label of the egress router for MPLS routing;

adding, by the first processor, the MPLS label on top of the VPLS VPN MPLS label in the header of each IP packet; and

forwarding, by the first processor, the one or more IP packets to at least one other router within a MPLS network.

2. The method of claim 1, wherein the VPLS VPN MPLS label is constructed using a VPLS module in the router of the base station.

3. The method of claim 1, further comprising:

determining, by the first processor, a Forwarding Equivalence Class (FEC) of each of the one or more IP packets, wherein determining the FEC of each of the one or more IP packets identifies which of the IP packets are similar or have identical characteristics in order that similar IP packets or IP packets with identical characteristics are forwarded in a same manner.

4. The method of claim 1, wherein forwarding the one or more IP packets to the at least one other router within the MPLS network comprises:

analyzing, by the first processor, IP packet header information within each IP packet; and

opening, by the first processor, a packet transmission path to a corresponding output port with reference to a forwarding table from which the one or more IP packets are transmitted to the at least one other router in a path to the egress router.

5. The method of claim 1, further comprising:

receiving, by a second processor within the at least one other router, the one or more IP packets;

for each IP packet, determining, by the second processor, whether a top label of the IP packet is a MPLS label;

responsive to the top label being the MPLS label, performing, by the second processor, a lookup in a label forwarding information data structure to identify the egress router that the IP packet is to be forwarded to;

responsive to identifying the egress router, determining, by the second processor, whether the at least one other router is a last router before the egress router;

responsive to the at least one other router failing to be the last router before the egress router, removing, by the second processor, the MPLS label;

adding, by the second processor, a new MPLS label indicating the routing for a next backhaul router; and

forwarding, by the second processor, the IP packet to the next backhaul router within the MPLS network.

6. The method of claim 5, further comprising:

responsive to the at least one other router being the last router before the egress router, removing, by the second processor, the MPLS label; and

forwarding, by the second processor, the IP packet to the egress router within the MPLS network.

7. The method of claim 5, further comprising:

responsive to the top label failing to be the MPLS label, removing, by the second processor, the VPLS VPN MPLS label; and

sending, by the second processor, the IP packet onto a destination device.

8. A computer program product comprising a computer readable storage medium having a computer readable program stored therein, wherein the computer readable program, when executed on a (NodeB/eNodeB) computing device, causes the (NodeB/eNodeB) computing device to:

receive a wireless signal from a mobile device;

convert the wireless signal into one or more internet protocol (IP) packets;

construct a VPLS virtual private network (VPN) multiprotocol label switching (MPLS) label in a header of each IP packet;

identify an egress router for the IP packets;

construct a MPLS label of the egress router for MPLS routing;

add the MPLS label on top of the VPLS VPN MPLS label in the header of each IP packet; and

forward the one or more IP packets to at least one other router within a MPLS network.

9. The computer program product of claim 8, wherein the VPLS VPN MPLS label is constructed using a VPLS module in the router of the base station.

10. The computer program product of claim 8, wherein the computer readable program further causes the (NodeB/eNodeB) computing device to:

determine a Forwarding Equivalence Class (FEC) of each of the one or more IP packets, wherein determining the FEC of each of the one or more IP packets identifies which of the IP packets are similar or have identical characteristics in order that similar IP packets or IP packets with identical characteristics are forwarded in a same manner.

11. The computer program product of claim 8, wherein the computer readable program to forward the one or more IP packets to the at least one other router within the MPLS network further causes the (NodeB/eNodeB) computing device to:

analyze IP packet header information within each IP packet; and

open a packet transmission path to a corresponding output port with reference to a forwarding table from which the one or more IP packets are transmitted to the at least one other router in a path to the egress router.

12. The computer program product of claim 8, wherein the computer readable program further causes a different computing device to:

receive the one or more IP packets;

for each IP packet, determine whether a top label of the IP packet is a MPLS label;

responsive to the top label being the MPLS label, perform a lookup in a label forwarding information data structure to identify the egress router that the IP packet is to be forwarded to;

responsive to identifying the egress router, determine whether the at least one other router is a last router before the egress router;

responsive to the at least one other router failing to be the last router before the egress router, remove the MPLS label;

add a new MPLS label indicating the routing for a next backhaul router; and

forward the IP packet to the next backhaul router within the MPLS network.

13. The computer program product of claim 12, wherein the computer readable program further causes the different computing device to:

responsive to the at least one other router being the last router before the egress router, remove the MPLS label; and

forward the IP packet to the egress router within the MPLS network.

14. The computer program product of claim 12, wherein the computer readable program further causes the different computing device to:

responsive to the top label failing to be the MPLS label, remove the VPLS VPN MPLS label; and

send the IP packet onto a destination device.

15. An apparatus, comprising:

a first processor within a router; and

a memory coupled to the first processor, wherein the memory comprises instructions which, when executed by the first processor, cause the first processor to;

receive a wireless signal from a mobile device;

convert the wireless signal into one or more internet protocol (IP) packets;

construct a VPLS virtual private network (VPN) multiprotocol label switching (MPLS) label in a header of each IP packet;

identify an egress router for the IP packets;

construct a MPLS label of the egress router for MPLS routing;

add the MPLS label on top of the VPLS VPN MPLS label in the header of each IP packet; and

forward the one or more IP packets to at least one other router within a MPLS network.

16. The apparatus of claim 15, wherein the VPLS VPN MPLS label is constructed using a VPLS module in the router of the base station.

17. The apparatus of claim 15, wherein the instruction further causes the first processor to:

determine a Forwarding Equivalence Class (FEC) of each of the one or more IP packets, wherein determining the FEC of each of the one or more IP packets identifies which of the IP packets are similar or have identical characteristics in order that similar IP packets or IP packets with identical characteristics are forwarded in a same manner.

18. The apparatus of claim 15, wherein the instructions to forward the one or more IP packets to the at least one other router within the MPLS network further causes the first processor to:

analyze IP packet header information within each IP packet; and

open a packet transmission path to a corresponding output port with reference to a forwarding table from which the one or more IP packets are transmitted to the at least one other router in a path to the egress router.

19. The apparatus of claim 15, further comprising:

a second processor within a router; and

the memory coupled to the second processor, wherein the memory comprises instructions which, when executed by the second processor, cause the second processor to;

receive the one or more IP packets;

for each IP packet, determine whether a top label of the IP packet is a MPLS label;

responsive to the top label being the MPLS label, perform a lookup in a label forwarding information data structure to identify the egress router that the IP packet is to be forwarded to;

responsive to identifying the egress router, determine whether the at least one other router is a last router before the egress router;

responsive to the at least one other router failing to be the last router before the egress router, remove the MPLS label;

add a new MPLS label indicating the routing for a next backhaul router; and

forward the IP packet to the next backhaul router within the MPLS network.

20. The apparatus of claim 19, wherein the instruction further causes the second processor to:

responsive to the at least one other router being the last router before the egress router, remove the MPLS label; and

forward the IP packet to the egress router within the MPLS network.

21. The apparatus of claim 19, wherein the instruction further causes the second processor to:

responsive to the top label failing to be the MPLS label, remove the VPLS VPN MPLS label; and

send the IP packet onto a destination device.