Mechanisms to improve the transmission control protocol performance in wireless networks

• US 8,717,900 B2
• Filed: 02/07/2011
• Issued: 05/06/2014
• Est. Priority Date: 02/07/2011
• Status: Active Grant

• Current Assignee: Adaptiv Networks Inc.
• Original Assignee: Livqos Incorporated
• Inventors: Williams, Matthew Robert, Vemulapali, Mohan Krishna
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): LOO, JUVENA W
• Application Number:
  US13/022,073
• Publication Number:
  US 20120201136A1
• Time in Patent Office: 1,184 Days
• Field of Search: 370229-240, 370310-463
• US Class Current: 370/236
• CPC Class Codes: H04L 47/18 End to end
• CPC Class Codes: H04L 47/2466 using signalling traffic
• CPC Class Codes: H04L 47/27 Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 28/0273 adapting protocols for flow control or congestion control to wireless environment, e.g. adapting transmission control protocol [TCP] wireless network protocols or protocol adaptations to wireless operation, e.g. wireless application protocol H04W80/00
• CPC Class Codes: H04W 80/06 Transport layer protocols, e.g. TCP [Transport Control Protocol] over wireless transmission control protocol/Internet protocol [TCP/IP] or user datagram protocol [UDP] H04L69/16

Abstract

A system located on either side of a wireless network for reducing the amount of collisions in the wireless network comprises a TCP server in communication with a TCP client using TCP protocols that use client acknowledgements, and an acknowledgement-summarizing device adapted to summarize at least one client acknowledgement from the TCP protocols in a summarizing acknowledgement, and to transmit the summarizing acknowledgement into the wireless network. The acknowledgement-summarizing device may be replaced or combined with an acknowledgement-aggregating device located on either side of the wireless network and adapted to aggregate one or more client acknowledgements from the TCP protocols into an encoded packet and to transmit the encoded packet into the wireless network.

Claims

1. A system for increasing the rate at which a transmission control protocol (“

TCP”

) congestion window opens in a network, said system comprising;

a TCP server in communication with a TCP client using TCP protocols that use client acknowledgements, and

a device located between the TCP server and the TCP client and adapted to derive one or more client acknowledgements from a single acknowledgement flowing between the TCP server and the TCP client, and to transmit all the derived client acknowledgements into the network and wherein said device defines a duty cycle for enabling and disabling the derivation of client acknowledgements.

2. The system of claim 1 in which said device limits the number of client acknowledgements that can be derived.

3. The system of claim 1 in which said device ensures a minimum segment size for each client acknowledgement derived.

4. The system of claim 1 in which said device is enabled to operate in a wireless network to optimize wireless local area network (“

LAN”

) performance while also increasing the rate at which the TCP congestion window is opened.

5. The system of claim 2 in which said device is adapted to allow said limit to be adjusted based upon the network type, network performance or signaling.

6. The system of claim 1 in which each client acknowledgement includes an internet protocol (“

IP”

) header, and said device is adapted to set the terms of service/differentiated services (“

TOS/DSCP”

) in the IP header of an acknowledgement to influence how the summarizing acknowledgment is carried over a Wi-Fi network using IEEE 801.11e.

7. A method for increasing the rate at which a TCP congestion window opens in a network, said method comprising:

intercepting traffic between a TCP server in communication with a TCP client using TCP protocols that use client acknowledgements,

identifying client acknowledgements from the TCP protocols,

deriving one or more client acknowledgements from the TCP protocols from a single acknowledgement flowing between the TCP server and TCP client,

defining a duty cycle for enabling and disabling the derivation of client acknowledgements, and

transmitting all the derived client acknowledgements into the network.

8. The method of claim 7 which includes limiting the number of client acknowledgements that can be derived.

9. The method of claim 7 which includes ensuring a minimum segment size for each derived client acknowledgement derived.

10. The method of claim 7 which includes enabling operation in a wireless network to optimize wireless LAN performance while also increasing the rate in which the TCP congestion window is opened.