System for dynamic selection and application of TCP congestion avoidance flavors

• US 10,574,796 B2
• Filed: 10/27/2017
• Issued: 02/25/2020
• Est. Priority Date: 02/26/2015
• Status: Active Grant

• Current Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Original Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Inventors: Ramaiah, Chaitra Maraliga, Dhanabalan, Praveen Raja
• Primary Examiner(s): Han, Clemence S
• Application Number:
  US15/796,540
• Publication Number:
  US 20180069949A1
• Time in Patent Office: 851 Days
• Field of Search: None
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]

Abstract

A system for optimizing network traffic is described. The system includes a packet engine configured to acquire data regarding a flow of a plurality of data packets over a link and to determine transport communication protocol (TCP) characteristics for the flow, and a TCP flavor selector configured to dynamically select a TCP flavor based on the TCP characteristics, where the TCP flavor can be used to modify the flow of data packets over the link. The TCP characteristics dynamically change with time. The TCP flavor selector is further configured to modify the flow using the TCP flavor.

Claims

1. A method comprising:

receiving, by a device intermediary to a plurality of clients and a plurality of servers, a flow of a plurality of data packets over a link between the device and a second device;

determining, by the device, characteristics of a first type of transport layer protocol for the flow of data packets;

identifying, by the device, a type of the link and bandwidth of the link;

selecting, by the device responsive to the characteristics of the first type of transport layer protocol, the type of the link and the bandwidth of the link, a second type of transport layer protocol for the flow of data packets; and

changing, by the device responsive to the selecting, from using the first type of transport layer protocol to the second type of transport layer protocol for the flow of data packets.

2. The method of claim 1, wherein the device is further configured to use a plurality of different types of transport layer protocols, the plurality of different types of transport layer protocols comprising the first type of transport layer protocol and the second type of transport layer protocol.

3. The method of claim 2, wherein each of the plurality of different types of transport layer protocols comprises a different congestion avoidance algorithm.

4. The method of claim 1, wherein determining characteristics of the first type of transport layer protocol further comprises determining a rate of packet loss.

5. The method of claim 1, wherein determining characteristics of the first type of transport layer protocol further comprises determining an average delay of packets.

6. The method of claim 1, wherein determining characteristics of the first type of transport layer protocol further comprises determining an average queueing delay.

7. The method of claim 1, wherein determining characteristics of the first type of transport layer protocol further comprises determining a current congestion window.

8. The method of claim 7, further comprising determining that the current congestion window is greater than an average bandwidth delay product.

9. The method of claim 1, wherein identifying the type of the link further comprises identifying the type of link as one of leased or broadband.

10. The method of claim 1, further comprising selecting, by the selector, a different type of transport layer protocol from a plurality of types of transport layer protocols to use for a second flow of data packets responsive to characteristics of a current transport layer protocol of the second flow, a type of a second link and a bandwidth of the second link.

11. A system comprising:

a device intermediary to a plurality of clients and a plurality of servers and configured to;

receive a flow of a plurality of data packets over a link between the device and a second device;

determine characteristics of a first type of transport layer protocol for the flow of data packets;

identify a type of the link and bandwidth of the link;

wherein the device configured to, responsive to the characteristics of the first type of transport layer protocol, the type of the link and the bandwidth of the link to select a second type of transport layer protocol for the flow of data packets; and

wherein the device, responsive to the selection, is configured to change to using the second type of transport layer protocol for the flow of data packets.

12. The system of claim 11, wherein the device is further configured to use a plurality of different types of transport layer protocols, the plurality of different types of transport layer protocols comprising the first type of transport layer protocol and the second type of transport layer protocol.

13. The system of claim 12, wherein each of the plurality of different types of transport layer protocols comprises a different congestion avoidance algorithm.

14. The system of claim 11, wherein the device is further configured to determine a rate of packet loss for characteristics of the first type of transport layer protocol.

15. The system of claim 11, wherein the device is further configured to determine an average delay of packets for characteristics of the first type of transport layer protocol.

16. The system of claim 11, wherein the device is further configured to determine an average queueing delay for characteristics of the first type of transport layer protocol.

17. The system of claim 11, wherein the device is further configured to determine a current congestion window for characteristics of the first type of transport layer protocol.

18. The system of claim 17, wherein the device is further configured to determine that the current congestion window is greater than an average bandwidth delay product.

19. The system of claim 11, wherein the type of the link comprises one of leased or broadband.

20. The system of claim 11, wherein the device is further configured to select a different type of transport layer protocol from a plurality of types of transport layer protocols to use for a second flow of data packets responsive to characteristics of a current transport layer protocol of the second flow, a type of a second link and a bandwidth of the second link.