System and method for adjusting the window size of a TCP packet through remote network elements

• US 8,098,579 B2
• Filed: 05/31/2007
• Issued: 01/17/2012
• Est. Priority Date: 08/22/2006
• Status: Active Grant

• Current Assignee: CenturyLink Intellectual Property LLC (Lumen Technologies, Inc.)
• Original Assignee: Embarq Holdings Company LLC (Lumen Technologies, Inc.)
• Inventors: Ray, Amar N., Bugenhagen, Michael K., Morrill, Robert J., Chakravarthy, Cadathur V.
• Primary Examiner(s): Ryman, Daniel J
• Assistant Examiner(s): Patel, Jay P
• Application Number:
  US11/809,913
• Publication Number:
  US 20080049632A1
• Time in Patent Office: 1,692 Days
• Field of Search: 370/230, 370/231, 370/252
• US Class Current: 370/230
• CPC Class Codes: H04L 41/0816 the condition being an adaptation, e.g. in response to network events
• CPC Class Codes: H04L 41/145 involving simulating, designing, planning or modelling of a network
• CPC Class Codes: H04L 43/0852 Delays
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

A system for adjusting the window size of a TCP packet on a packet network including a receiving transport layer device configured to determine network performance information of the packet network; concatenate the network performance information into the data packets; adjust the window size of the TCP packet based on the network performance information; a non-transport layer device in communication with the receiving transport layer device for receiving the data packets; and a transport layer device in communication with the non-transport layer device, wherein the non-transport layer device forwards the data packets on to the transport layer device. A method for adjusting the window size of a TCP packet on a packet network is also included.

Claims

1. A system for adjusting the window size of a TCP session on a packet network, the system comprising:

a non-transport layer device;

a receiving transport layer device in communication with the non-transport layer device and operable to receive packets communicated by the non-transport layer device, wherein the receiving transport layer device communicates with the non-transport layer device using Ethernet protocol and wherein the non-transport layer device determines network performance information associated with a path of the network and communicates the network performance information to the receiving transport layer device, the path allowing communication from the non-transport layer device to the receiving transport layer device; and

wherein the receiving transport layer device is operable to adjust the window size of the TCP session in response to the received network performance information, wherein said adjusting said window size is delayed to increase a transmit versus wait for an acknowledgement data packet to accommodate packet network link lengths.

2. The system for adjusting the window size of a TCP session on a packet network of claim 1 further comprising:

a sending network layer device for receiving said data packets from said transport layer device, said sending network layer device configured to;

receive network performance information of said packet network; and

adjust said window size of said TCP packet in response to the received network performance information.

3. The system for adjusting the window size of a TCP session on a packet network of claim 1 wherein said non-transport layer device is selected from the group consisting of a physical layer device, data link layer device, network layer device, session layer device, presentation layer device, and application layer device.

4. The system for adjusting the window size of a TCP session on a packet network of claim 1 wherein the network performance information includes data indicative of a total number of data packets communicated over the path in at least one direction and data indicative of a total amount of bandwidth of data communicated over the path.

5. The system for adjusting the window size of a TCP session on a packet network of claim 1 wherein the network performance information includes data indicative of a total number of data packets that each include data for real-time applications communicated over the path in at least one direction and data indicative of a total amount of bandwidth of data for real-time applications communicated over the path.

6. The system for adjusting the window size of a TCP session on a packet network of claim 1 wherein said receiving transport layer device includes at least one means for:

counting total of said data packets being communicated via said packet network during a time period;

counting a subset of said data packets including real-time content being communicated via said packet network during said time period;

determining bandwidth of the subset of said data packets being communicated via said packet network; and

determining bandwidth of said data packets including real-time content being communicated via said packet network.

7. The system for adjusting the window size of a TCP session on a packet network of claim 1 wherein the non-transport layer device includes at least one means for:

counting a total of said data packets being communicated via said packet network during a time period;

counting a subset of said data packets including real-time content being communicated via said packet network during said time period;

determining bandwidth of the subset of said data packets being communicated via said packet network; and

determining bandwidth of said data packets including real-time content being communicated via said packet network.

8. The system for adjusting the window size of a TCP session on a packet network of claim 1 wherein the non-transport layer device includes a ITU-T Y.1731 module configured to separately count total data packets and data packets including real-time content.

9. The system for adjusting the window size of a TCP session on a packet network of claim 1 wherein said adjust said window size includes a decrease or an increase in a timer value, said timer value relating to the re-transmission of a portion of said data packets.

10. The system for adjusting the window size of a TCP session on a packet network of claim 1 wherein said adjust the window size includes increasing or decreasing the number of octets contained in said data packets said receiving transport layer device is prepared to accept.

11. A method of adjusting the window size of a TCP communications session on a packet network, the method comprising:

determining network performance information associated with a communications path from a non-transport layer device and a receiving transport layer device, wherein communications over the communications path are conducted using an Ethernet protocol;

storing the network performance information in a packet;

communicating the packet to a sending element; and

adjusting the window size of the TCP communications session in response to the communicated packet, wherein said adjusting said window size is delayed to increase a transmit versus wait for an acknowledgement data packet to accommodate packet network link lengths.

12. The method for adjusting the window size of a TCP session on a packet network of claim 11, wherein said network performance information includes information that is indicative of bandwidth of data packets including real-time content and total data packets communicated over said packet network.

13. The method for adjusting the window size of a TCP session on a packet network of claim 11, wherein determining the network performance information includes determining data indicative of a total number of data packets communicated over the path in at least one direction and data indicative of a total amount of bandwidth of data communicated over the path.

14. The method for adjusting the window size of a TCP session on a packet network of claim 11, wherein determining the network performance information includes determining data indicative of a total number of data packets that each include data for real-time applications communicated over the path in at least one direction and data indicative of a total amount of bandwidth of data for real-time applications communicated over the path.

15. The method for adjusting the window size of a TCP session on a packet network of claim 11 further comprising:

determining whether at least one network performance information value of said packet network exceeds a predetermined threshold value;

communicating an instruction in an acknowledgement data packet to said receiving transport layer device to adjust said window size.

16. The method for adjusting the window size of a TCP session on a packet network of claim 11 wherein one of said non-transport layer device and receiving transport layer device includes a ITU-T Y.1731 module configured to separately count total data packets and data packets including real-time content.

17. A system for adjusting the window size of a TCP communications session on a packet network, the system comprising:

means for determining network performance information associated with communications path from a non-transport layer device and a receiving transport layer device, wherein communications over the communications path are conducted using an Ethernet protocol;

means for storing the network performance information in a packet;

means for communicating the packet to the sending element;

means for adjusting the window size of the TCP communications session, in response to the communicated packet; and

means for delaying said adjusting said window size to increase a transmit versus wait for an acknowledgement data packet to accommodate packet network link lengths.

18. The system for adjusting the window size of a TCP session on a packet network of claim 17 wherein determining network performance information includes determining a first set of network performance information associated with packets that include data for real-time applications and a second set of network performance information associated with both the packets that include data for real-time applications and packets that include data for non-real time applications.

19. The system for adjusting the window size of a TCP session on a packet network of claim 17, wherein determining the network performance information includes determining data indicative of a total number of data packets communicated over the path in at least one direction and data indicative of a total amount of bandwidth of data communicated over the path.

20. The system for adjusting the window size of a TCP session on a packet network of claim 17, wherein determining the network performance information includes determining data indicative of a total number of data packets that include data for real-time applications communicated over the path in at least one direction and data indicative of a total amount of bandwidth of data for real-time applications communicated over the path.

21. The system for adjusting the window size of a TCP session on a packet network of claim 17 further comprising:

means for determining whether at least one network performance information value of said packet network exceeds a predetermined threshold value;

means for communicating an instruction in an acknowledgement data packet to said receiving transport layer device to adjust said window size of said data packet.

22. The system for adjusting the window size of a TCP session on a packet network of claim 17 wherein one of said non-transport layer device and receiving transport layer device includes a ITU-T Y.1731 module configured to separately count total data packets and data packets including real-time content.