Method and system for network data flow management

• US 8,364,812 B2
• Filed: 08/27/2010
• Issued: 01/29/2013
• Est. Priority Date: 08/27/2010
• Status: Active Grant

• Current Assignee: PNI Canada Acquireco Corp. (Francisco Partners Management LLC)
• Original Assignee: Sandvine Incorporated ULC (Sandvine Corp.)
• Inventors: Loach, Scot
• Primary Examiner(s): Bilgrami, Asghar
• Application Number:
  US12/869,948
• Publication Number:
  US 20120054330A1
• Time in Patent Office: 886 Days
• Field of Search: 709/224
• US Class Current: 709/224
• CPC Class Codes: H04L 47/17 Interaction among intermediate nodes, e.g. hop by hop
• CPC Class Codes: H04L 47/19 at layers above the network layer network arrangements for networked applications for scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04L 47/193 at the transport layer, e.g. TCP related
• CPC Class Codes: H04L 47/37 Slow start
• CPC Class Codes: H04L 47/40 using split connections
• CPC Class Codes: H04L 67/60 Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources admission control or resource allocation H04L47/70
• CPC Class Codes: H04L 69/02 Protocol performance
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures

Abstract

A network data flow management device including: a working packet module configured to store data related to a data flow; at least one network interface connected to the working packet module for receiving and sending data related to data flows; and a processor configured to: receive data from the working packet module and determine if the data flow matches a predetermined protocol; and if the data flow matches the predetermined protocol, send predictive acknowledgments based on the data flow via the network interface. A method for network data flow management including: monitoring a data flow for a predetermined protocol; if the data flow matches the predetermined protocol, saving data relating to the data flow; and creating and sending a predictive acknowledgement packet related to the data flow.

Claims

1. A network data flow management device comprising:

a working packet module configured to store data related to a data flow;

at least one network interface connected to the working packet module for receiving and sending data related to data flows;

a processor configured to;

receive data from the working packet module and determine if the data flow matches a predetermined protocol; and

if the data flow matches the predetermined protocol, send predictive acknowledgments based on the data flow via the network interface;

wherein the predictive acknowledgement is sent after waiting a hold-off time and before receiving data that the acknowledgment is acknowledging.

2. The network data flow management device of claim 1, wherein one or more timers are in communication with the processor to allow the processor to determine the timing of the predictive acknowledgments.

3. The network data flow management device of claim 1, wherein the predetermined protocol is one that uses a positive acknowledgment protocol.

4. The network data flow management device of claim 3, wherein the predetermined protocol is a protocol selected from:

Transmission control protocol (TCP);

Hypertext transfer protocol (HTTP);

Post Office Protocol (POP3); and

File Transfer Protocol (FTP).

5. The network data management of claim 3, wherein the predetermined protocol is encrypted using transport layer security (TLS).

6. The network data flow management device of claim 1, where the predictive acknowledgments being sent may be based on a client equipment type.

7. The network data flow management device of claim 6, wherein the client equipment type includes a wireless handset.

8. The network data flow management device of claim 1, where the predictive acknowledgments being sent may be based on at least one client property.

9. The network data flow management device of claim 8 wherein the at least one client property is one or more of:

service plan;

location;

network access type;

browser; and

operating system.

10. The network data flow management device of claim 1 wherein the network data flow management device is deployed in a flow path and the at least one network interface is adapted to receive packets from a sender and transmit packets to a receiver.

11. The network data flow management device of claim 1 wherein the network data flow management device is deployed in a client flow path and the at least one network interface is adapted to receive and transmit packets from a single client to multiple servers.

12. The network data flow management device of claim 1 wherein the network data flow management device is deployed external to the data flow and receives a copy of the data flow diverted through a network device.

13. A method for network data flow management comprising:

monitoring a data flow for a predetermined protocol;

if the data flow matches the predetermined protocol, saving data relating to the data flow; and

creating and sending a predictive acknowledgement packet related to the data flow;

wherein the predictive acknowledgement is sent after waiting a hold-off time and before receiving data that the acknowledgment is acknowledging.

14. The method for data flow management of claim 13, further comprising determining whether or not to send the predictive acknowledgement packet, wherein the decision to send the predictive acknowledgment packet is based on one or more of:

network congestion;

history of previous data flow results;

round-trip time;

type and content of the data flow.

15. The method for data flow management of claim 13, further comprising determining whether or not to send the predictive acknowledgement packet, wherein the decision to send the predictive acknowledgment packet is based on at least one client property.

16. The method for data flow management of claim 15, wherein the at least one client property is based on one or more of:

service plan;

location;

network access type;

browser;

operating system; and

client equipment type.

17. The method for data flow management of claim 13, further comprising recovering a dropped packet between a server and a network flow management device by terminating a connection between the network flow management device and the client and establishing a new session to the server, re-sending at least one of the predictive acknowledgement packets, and recovering the dropped packet from the response on the new session.

18. The method for data flow management of claim 13, further comprising waiting for a handshake to be complete prior to creating and sending the predictive acknowledgment packet when Transport Layer Security (TLS) is used to encrypt the flow.

19. The method for data flow management of claim 13, further comprising waiting a hold-off time before sending the predictive acknowledgement packet.

20. The method for data flow management of claim 13, wherein the predetermined protocol is one that uses a positive acknowledgment protocol.