BURSTY DATA TRANSMISSION IN A CONGESTION CONTROLLED NETWORK

• US 20150271073A1
• Filed: 03/24/2014
• Published: 09/24/2015
• Est. Priority Date: 03/24/2014
• Status: Active Grant

• Current Assignee: Vmware LLC (Broadcom, Inc.)
• Original Assignee: VMware, Inc. (Broadcom, Inc.)
• Inventors: SALADI, Kalyan, MEHTA, Rishi
• Granted Patent: US 10,341,245 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]
• CPC Class Codes: H04L 47/37 Slow start

Abstract

In a computer-implemented method for reducing delay of bursty data transmission in a network employing a congestion control protocol, data is accessed that is to be periodically transmitted over a network employing a congestion control protocol. The data is to be periodically transmitted with a high burst rate followed by an idle period. The congestion control protocol progressively increases a data transmission rate during a data transmission rate increase period invoked immediately following a predetermined idle period. Prior to transmitting the data, priming data is transmitted during at least a portion of the idle period until the congestion control protocol progressively increases the data transmission rate to a desired transmission rate. The data is transmitted at the desired transmission rate.

Claims

1. A computer-implemented method for reducing delay of bursty data transmission in a network employing a congestion control protocol, said computer-implemented method comprising:

accessing data to be periodically transmitted over a network employing a congestion control protocol, wherein said data is to be periodically transmitted with a high burst rate followed by an idle period, wherein said congestion control protocol progressively increases a data transmission rate during a data transmission rate increase period invoked immediately following a predetermined idle period;

prior to transmitting said data, transmitting priming data during at least a portion of said idle period until said congestion control protocol progressively increases said data transmission rate to a desired transmission rate; and

transmitting said data at said desired transmission rate.

2. The computer-implemented method of claim 1, further comprises:

in response to realization of a predetermined data transmission rate, transmitting said data over said network.

3. The computer-implemented method of claim 2, wherein said transmitting said data further comprises:

in response to completion of said data transmission rate increase period, transmitting said data.

4. The computer-implemented method of claim 2, wherein said transmitting said data further comprises:

transmitting said data to a secondary virtual machine.

5. The computer-implemented method of claim 2, wherein said transmitting is based on a symmetric multiprocessing systems fault tolerance (SMP-FT) protocol.

6. The computer-implemented method of claim 1, wherein said accessing data further comprises:

periodically accessing state data of a primary virtual machine.

7. The computer-implemented method of claim 6, wherein said primary virtual machine is hosted on first host computing system and a secondary virtual machine is hosted by a second host computing system.

8. The computer-implemented method of claim 1, wherein said network utilizes TCP/IP.

9. The computer-implemented method of claim 1, wherein said congestion control protocol is a Slow-Start Threshold (SST) congestion control protocol.

10. The computer-implemented method of claim 1, wherein said predetermined idle period is a predetermined number of round trip times (RTTs).

11. The computer-implemented method of claim 1, wherein said transmitted data comprises a plurality of data packets, wherein each data packet is 1400 bytes.

12. A non-transitory computer-readable storage medium having instructions embodied therein that, when executed, cause a computer system to perform a method for reducing delay of bursty transmission in a network employing a congestion control protocol, said method comprising:

accessing state data of a primary virtual machine to be periodically transmitted over a network employing a congestion control protocol, wherein said congestion control protocol progressively increases data transmission rates during a data transmission rate increase period invoked immediately following a predetermined idle period, wherein said state data is to be periodically transmitted with a high burst rate followed by an idle period;

prior to transmitting said state data of said primary virtual machine over said network, transmitting priming data during at least a portion of said idle period until said congestion control protocol progressively increases said data transmission rate to a desired transmission rate; and

periodically transmitting said state data to a secondary virtual machine over said network at said desired transmission rate.

13. The non-transitory computer-readable storage medium of claim 12, wherein said state data is accessed via a symmetric multiprocessing systems fault tolerance (SMP-FT) protocol.

14. The non-transitory computer-readable storage medium of claim 12, wherein said periodically transmitting said state data further is in response to realization of a predetermined data transmission rate.

15. The non-transitory computer-readable storage medium of claim 12, wherein said periodically transmitting said state data is in response to completion of said data transmission rate increase period.

16. The non-transitory computer-readable storage medium of claim 12, wherein said primary virtual machine is hosted on first host computing system and a secondary virtual machine is hosted by a second host computing system.

17. The non-transitory computer-readable storage medium of claim 12, wherein said network employs TCP/IP.

18. The non-transitory computer-readable storage medium of claim 12, wherein said congestion control protocol is a Slow-Start Threshold (SST) congestion control protocol.

19. The non-transitory computer-readable storage medium of claim 12, wherein said predetermined idle period is a predetermined number of round trip times (RTTs).

20. The non-transitory computer-readable storage medium of claim 12, wherein said transmitted state data comprises a plurality of data packets, wherein each data packet is 1400 bytes.

21. A computer-implemented method for preventing settling of a transmission rate to a reduced value, said computer-implemented method comprising:

accessing data to be periodically transmitted over a network employing a congestion control protocol comprising a predetermined idle period, wherein said data is to be periodically transmitted with a high burst rate, wherein transmission of said data is preceded by an idle period;

determining said idle period preceding transmission of said data exceeds said predetermined idle period of said congestion control protocol;

transmitting priming data during at least a portion of said predetermined idle period to prevent settling of a transmission rate of said network to a reduced value; and

transmitting said data over said network.

22. The computer-implemented method of claim 21, wherein said network utilizes TCP/IP.

23. The computer-implemented method of claim 21, wherein said congestion control protocol is a Slow-Start Threshold (SST) congestion control protocol.