System and method for dynamic bandwidth adjustments for cellular interfaces in a network environment

• US 9,621,476 B2
• Filed: 03/09/2015
• Issued: 04/11/2017
• Est. Priority Date: 03/05/2015
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Gopinathan, Sujay, Puthenparambil, Jeslin Antony, Anandan, Swapna, Roay, Binod, Datar, Vivek
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US14/641,536
• Publication Number:
  US 20160261515A1
• Time in Patent Office: 764 Days
• CPC Class Codes: H04L 41/0896 Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, H04L47/76
• CPC Class Codes: H04L 43/0876 Network utilisation, e.g. volume of load or congestion level
• CPC Class Codes: H04L 43/0888 Throughput
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 47/127 by using congestion prediction
• CPC Class Codes: H04L 47/522 Dynamic queue service slot or variable bandwidth allocation
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing

Abstract

A method is provided in one example embodiment and may include determining a predicted average throughput for each of one or more cellular interfaces and adjusting bandwidth for each of the one or more of the cellular interfaces based, at least in part, on the predicted average throughput determined for each of the one or more cellular interfaces. Another method can be provided, which may include determining a variance in path metrics for multiple cellular interfaces and updating a routing table for the cellular interfaces using the determined variance if there is a difference between the determined variance and a previous variance determined for the cellular interfaces. Another method can be provided, which may include monitoring watermark thresholds for a MAC buffer; generating an interrupt when a particular watermark threshold for the MAC buffer is reached; and adjusting enqueueing of uplink packets into the MAC buffer based on the interrupt.

Claims

1. A method comprising:

determining, at least in part by a hardware processor, a variance in path metrics for a plurality of cellular interfaces;

determining, at least in part by the hardware processor, whether there is a difference between the determined variance and a previous variance in path metrics determined for the plurality of cellular interfaces; and

updating, at least in part by the hardware processor, a routing table for the plurality of cellular interfaces using the determined variance if there is a difference between the determined variance and the previous variance in path metrics determined for the plurality of cellular interfaces.

2. The method of claim 1, wherein determining the variance in path metrics further comprises:

determining a ratio between a minimum path metric of the plurality of cellular interfaces and a maximum path metric of the plurality of cellular interfaces.

3. The method of claim 1, further comprising:

storing the determined variance in at least one storage of a router if there is a difference between the determined variance and the previous variance in path metrics determined for the plurality of cellular interfaces.

4. The method of claim 1, further comprising:

providing unequal load balancing for the plurality of cellular interfaces according to the routing table.

5. The method of claim 1, wherein a particular path metric for a particular cellular interface is based, at least in part, on a bandwidth of the particular cellular interface and wherein the bandwidth is capable of being dynamically adjusted based, at least in part, on throughput through the particular cellular interface.

6. The method of claim 1, wherein the determining the variance in path metrics for the plurality of cellular interfaces is performed according to a predetermined time interval.

7. The method of claim 1, wherein the determining the variance in path metrics for the plurality of cellular interfaces is performed upon determining that a bandwidth has been adjusted for a particular cellular interface.

8. The method of claim 1, wherein the updating the routing table includes applying the determined variance to a particular path metric for a particular cellular interface that is the smallest of the path metrics for the plurality of cellular interfaces.

9. The method of claim 1, wherein each of the plurality of cellular interfaces is provided for a router and wherein at least of the plurality of cellular interfaces is capable of connecting to a Long Term Evolution (LTE) Radio Access Network.

10. One or more non-transitory tangible media encoding logic that includes instructions for execution that when executed by a processor, is operable to perform operations comprising:

determining a variance in path metrics for a plurality of cellular interfaces;

determining whether there is a difference between the determined variance and a previous variance in path metrics determined for the plurality of cellular interfaces; and

updating a routing table for the plurality of cellular interfaces using the determined variance if there is a difference between the determined variance and the previous variance in path metrics determined for the plurality of cellular interfaces.

11. The media of claim 10, wherein determining the variance in path metrics further comprises:

determining a ratio between a minimum path metric of the plurality of cellular interfaces and a maximum path metric of the plurality of cellular interfaces.

12. The media of claim 10, the operations further comprising:

storing the determined variance in at least one storage of a router if there is a difference between the determined variance and the previous variance in path metrics determined for the plurality of cellular interfaces.

13. The media of claim 10, the operations further comprising:

providing unequal load balancing for the plurality of cellular interfaces according to the routing table.

14. The media of claim 10, wherein the determining the variance in path metrics for the plurality of cellular interfaces is performed upon determining that a bandwidth has been adjusted for a particular cellular interface and wherein the bandwidth is capable of being dynamically adjusted based, at least in part, on throughput through the particular cellular interface.

15. The media of claim 10, wherein the updating the routing table includes applying the determined variance to a particular path metric for a particular cellular interface that is the smallest of the path metrics for the plurality of cellular interfaces.

16. An apparatus comprising:

a memory element for storing data; and

a processor that executes instructions associated with the data, wherein the processor and the memory element cooperate such that the apparatus is configured for;

determining a variance in path metrics for a plurality of cellular interfaces;

determining whether there is a difference between the determined variance and a previous variance in path metrics determined for the plurality of cellular interfaces; and

updating a routing table for the plurality of cellular interfaces using the determined variance if there is a difference between the determined variance and the previous variance in path metrics determined for the plurality of cellular interfaces.

17. The apparatus of claim 16, wherein determining the variance in path metrics further comprises:

determining a ratio between a minimum path metric of the plurality of cellular interfaces and a maximum path metric of the plurality of cellular interfaces.

18. The apparatus of claim 16, wherein a particular path metric for a particular cellular interface is based, at least in part, on a bandwidth of the particular cellular interface and wherein the bandwidth is capable of being dynamically adjusted based, at least in part, on throughput through the particular cellular interface.

19. The apparatus of claim 16, wherein the determining the variance in path metrics for the plurality of cellular interfaces is performed upon determining that a bandwidth has been adjusted for a particular cellular interface.

20. The apparatus of claim 16, wherein the apparatus is a router and wherein each of the plurality of cellular interfaces at least of the plurality of cellular interfaces is capable of connecting to a Long Term Evolution (LTE) Radio Access Network.