System and method for offloading data in a communication system

• US 9,031,038 B2
• Filed: 07/10/2011
• Issued: 05/12/2015
• 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): Algahaim, Helal A
• Assistant Examiner(s): ISMAIL, MAHMOUD S
• Application Number:
  US13/179,538
• Publication Number:
  US 20120082132A1
• Time in Patent Office: 1,402 Days
• Field of Search: 370/235, 370/329, 370/254, 370/328, 370/352, 370/331, 455/418
• US Class Current: 370/331
• 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 over a first link at a first network element; establishing an out-of-band channel over a second link between the first network element and a second network element; and receiving instructions at the first network element to offload the data packet from the first link. In more particular embodiments, the first network element is a mobile enabled router, and the second network element is a gateway general packet radio service support node or a packet data network gateway. The method can also include receiving a discovery message from the second network element, the discovery message triggering the establishment of the out-of-band channel. In certain cases, the data packet is offloaded based on a type of data in the data packet.

Claims

1. A method, comprising:

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

transmitting from the first network element a tunnel endpoint identifier of the first link over the first link;

receiving a discovery message over a second link, the discovery message including a tunnel endpoint identifier of the second link, the discovery message triggering an establishment of an out-of-band channel;

establishing the out-of-band channel over a third link between the first network element and a second network element;

establishing a generic routing encapsulation (GRE) tunnel between the first network element and the second network element using the out-of-band channel; and

receiving instructions at the first network element over the third link to offload the data packet from the first link, wherein the first network element is configured to use the out-of-band channel to identify the first network element to the second network element, to confirm a receipt of the discovery message, and to obtain the instructions.

2. The method of claim 1, wherein the first network element is a mobile enabled router, and the second network element is a gateway general packet radio service support node or a packet data network gateway.

3. The method of claim 1, wherein the data packet is offloaded based on whether data in the data packet is voice data.

4. The method of claim 1, wherein the first network element is configured to map classes of traffic to backhaul links based on a level of quality of the traffic.

5. The method of claim 1, wherein the GRE tunnel is used to loopback traffic to the first network element during handover activities.

13. The method of claim 1, wherein the receiving the discovery message is performed when the first network element transmits a packet over the first link or when the second link is established.

6. 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 link at a first network element;

transmitting from the first network element a tunnel endpoint identifier of the first link over the first link;

receiving a discovery message over a second link, the discovery message including a tunnel endpoint identifier of the second link, the discovery message triggering an establishment of an out-of-band channel;

establishing the out-of-band channel over a third link between the first network element and a second network element;

establishing a generic routing encapsulation (GRE) tunnel between the first network element and the second network element using the out-of-band channel;

receiving instructions at the first network element over the third link to offload the data packet from the first link; and

using the out-of-band channel to identify the first network element to the second network element, to confirm a receipt of the discovery message, and to obtain the instructions.

7. The logic of claim 6, wherein the first network element is a mobile enabled router, and the second network element is a gateway general packet radio service support node or a packet data network gateway.

8. The logic of claim 6, wherein the data packet is offloaded based on whether data in the data packet is voice data.

9. The logic of claim 6, the operations further comprising:

mapping classes of traffic to backhaul links based on a level of quality of the traffic.

10. The logic of claim 6, wherein the GRE tunnel is used to loopback traffic to the first network element during handover activities.

14. The logic of claim 6, wherein the receiving the discovery message is performed when the first network element transmits a packet over the first link or when the second link is established.

11. An apparatus, comprising:

a memory element configured to store data; and

a processor operable to execute instructions associated with the data;

wherein the apparatus is configured to

receive a data packet over a first link;

transmit from the apparatus a tunnel endpoint identifier of the first link over the first link;

receive a discovery message over a second link, the discovery message including a tunnel endpoint identifier of the second link, the discovery message triggering an establishment of an out-of-band channel;

establish the out-of-band channel over a third link with a network element;

establish a generic routing encapsulation (GRE) tunnel between the apparatus and the network element using the out-of-band channel; and

receive instructions over the third link to offload the data packet from the first link, wherein the apparatus is configured to use the out-of-band channel to identify the apparatus to the network element, to confirm a receipt of the discovery message, and to obtain the instructions.

12. The apparatus of claim 11, wherein the data packet is offloaded based on whether data in the data packet is voice data, and the apparatus is configured to map classes of traffic to backhaul links based on a level of quality of the traffic.

15. The apparatus of claim 11, wherein the apparatus receives the discovery message when the apparatus transmits a packet over the first link or when the second link is established.