System and method for offloading data in a communication system

• US 9,973,961 B2
• Filed: 04/10/2015
• Issued: 05/15/2018
• Est. Priority Date: 10/05/2010
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Andreasen, Flemming S., Leung, Kent K., Khouderchah, Michel, Iyer, Jayaraman R., Stammers, Timothy P.
• Primary Examiner(s): Mered, Habte
• Application Number:
  US14/683,228
• Publication Number:
  US 20150215810A1
• Time in Patent Office: 1,131 Days
• CPC Class Codes: H04L 12/4633 Interconnection of networks using encapsulation techniques, e.g. tunneling
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/243 using M+N parallel active paths
• CPC Class Codes: H04L 45/26 Route discovery packet
• CPC Class Codes: H04L 61/2514 between local and global IP addresses
• CPC Class Codes: H04W 28/0226 based on location or mobility handoff or reselection H04W36/00; mobile application services making use of the location of users or terminals H04W4/02
• CPC Class Codes: H04W 40/24 Connectivity information management, e.g. connectivity discovery or connectivity update
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information

Abstract

A method is provided in one example embodiment and includes receiving a data packet transported on a backhaul link at a first network element; de-capsulating the data packet; identifying whether the data packet is an upstream data packet; identifying whether the data packet matches an internet protocol (IP) access control list (ACL) or a tunnel endpoint identifier; and offloading the data packet from the backhaul link. In more specific embodiment, the method can include identifying that the data packet does not match the IP ACL or the tunnel endpoint identifier; and communicating the data packet to a second network element. In other examples, the method can include identifying that the data packet is a downstream data packet; identifying a service to be performed for the data packet that cannot be performed at the first network element; and communicating the data packet to a second network element.

Claims

1. A method, comprising:

receiving a data packet over a first tunnel at a first network element;

receiving a discovery message over a second tunnel at the first network element, the discovery message including an in-band signaling packet;

establishing a first generic routing encapsulation (GRE) tunnel between the first network element and a second network element;

receiving instructions over the first GRE tunnel at the first network element specifying criteria for selectively offloading data packets from the first tunnel, based at least in part on identifying whether the data packets correspond to at least one of an Internet Protocol (IP) access control list (ACL) or a tunnel endpoint identifier;

determining whether to offload the data packet from the first tunnel to a second GRE tunnel, based on the received instructions.

2. The method of claim 1, further comprising:

sending in the first tunnel a message from the first network element, the message including a tunnel endpoint identifier of the first tunnel.

3. The method of claim 2, wherein the message includes a mobility enabled router identifier.

4. The method of claim 2, wherein the message includes a general packet radio service tunneling protocol user plane (GTP-U) packet.

5. The method of claim 1, wherein the in-band signaling packet includes a header and a payload, the payload including a tunnel endpoint identifier of a third tunnel.

6. The method of claim 1, wherein the discovery message includes an Internet Protocol (IP) address of the second network element.

7. The method of claim 1, wherein the in-band signaling packet includes a header and a payload, the payload including an IP address of user equipment, and the instructions are based on the IP address of the user equipment.

8. Logic, encoded in one or more non-transitory media, that includes code for execution and, when executed by a processor, is operable to perform operations comprising:

receiving a data packet over a first tunnel at a first network element;

receiving a discovery message over a second tunnel at the first network element, the discovery message including an in-band signaling packet;

establishing a first generic routing encapsulation (GRE) tunnel between the first network element and a second network element;

receiving instructions over the first GRE tunnel at the first network element specifying criteria for selectively offloading data packets from the first tunnel, based at least in part on identifying whether the data packets correspond to at least one of an Internet Protocol (IP) access control list (ACL) or a tunnel endpoint identifier;

determining whether to offload the data packet from the first tunnel to a second GRE tunnel, based on the received instructions.

9. The logic of claim 8, the operations further comprising:

sending in the first tunnel a message from the first network element, the message including a tunnel endpoint identifier of the first tunnel.

10. The logic of claim 9, wherein the message includes a mobility enabled router identifier.

11. The logic of claim 9, wherein the message includes a general packet radio service tunneling protocol user plane (GTP-U) packet.

12. The logic of claim 8, wherein the in-band signaling packet includes a header and a payload, the payload including a tunnel endpoint identifier of a third tunnel.

13. The logic of claim 8, wherein the in-band signaling packet includes a header and a payload, the payload including an IP address of user equipment, and the instructions are based on the IP address of the user equipment.

14. An apparatus, comprising:

a memory element that stores data;

a processor configured to execute instructions associated with the data; and

a traffic offload module configured to interface with the memory element and the processor, wherein the apparatus receives a data packet over a first tunnel and receives a discovery message over a second tunnel, the discovery message including an in-band signaling packet, the apparatus is configured to establish a first generic routing encapsulation (GRE) tunnel with a network element, and the apparatus receives instructions over the first GRE tunnel specifying criteria for selectively offloading data packets from the first tunnel, based at least in part on identifying whether the data packets correspond to at least one of an Internet Protocol (IP) access control list (ACL) or a tunnel endpoint identifier, and wherein the apparatus determines whether to offload the data packet from the first tunnel to a second GRE tunnel, based on the received instructions.

15. The apparatus of claim 14, wherein the apparatus sends in the first tunnel a message including a tunnel endpoint identifier of the first tunnel.

16. The apparatus of claim 15, wherein the message includes a mobility enabled router identifier.

17. The apparatus of claim 15, wherein the message includes a general packet radio service tunneling protocol user plane (GTP-U) packet.

18. The apparatus of claim 14, wherein the in-band signaling packet includes a header and a payload, the payload including a tunnel endpoint identifier of a third tunnel.

19. The apparatus of claim 14, wherein the discovery message includes an Internet Protocol (IP) address of the network element.

20. The apparatus of claim 14, wherein the in-band signaling packet includes a header and a payload, the payload including an IP address of user equipment, and the instructions are based on the IP address of the user equipment.