Network characteristic-based compression of network traffic

• US 7,953,881 B1
• Filed: 06/12/2008
• Issued: 05/31/2011
• Est. Priority Date: 06/12/2008
• Status: Expired due to Fees

• Current Assignee: Juniper Networks Incorporated
• Original Assignee: Juniper Networks Incorporated
• Inventors: Vadlakonda, Sravan, Gugle, Nitin, Kasturi, Rohini
• Primary Examiner(s): Jaroenchonwanit; Bunjob
• Application Number:
  US12/137,999
• Time in Patent Office: 1,083 Days
• Field of Search: 709/231
• US Class Current: 709/231
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers

Abstract

A network optimization device may receive a stream of data and identify a selected compression dictionary from among a number of compression dictionaries based on the received stream of data. A receiving network device may be notified regarding the selected compression dictionary. The stream of data may be compressed using the selected compression dictionary and transmitted to the receiving device.

Claims

1. A method comprising:

receiving, by a network device, a stream of data;

selecting, by the network device, a compression dictionary from among a number of compression dictionaries based on the stream of data;

transmitting, by the network device, a compression dictionary notification message to a receiving device regarding the compression dictionary, where the compression dictionary notification message comprises at least an initial sequence number associated with a compressed stream of data and an identification of the compression dictionary used to compress the compressed stream of data;

compressing, by the network device, the stream of data using the compression dictionary to form the compressed stream of data; and

transmitting, by the network device, the compressed stream of data to the receiving device.

2. The method of claim 1, where the stream of data comprises a transmission control protocol (TCP) stream.

3. The method of claim 1, where the selecting the compression dictionary from among the number of compression dictionaries based on the stream of data, further comprises:

determining characteristics associated with the stream of data;

comparing the determined characteristics with one or more compression rules, where each of the one or more compression rules corresponds to at least one data characteristic associated with a corresponding one of the number of compression dictionaries; and

selecting the compression dictionary based on the comparing.

4. The method of claim 3, where the characteristics comprise network-related characteristics.

5. The method of claim 3, where the characteristics comprise at least one of:

source internet protocol (IP) address, destination IP address, source port, destination port, or protocol.

6. The method of claim 3, further comprising:

determining whether the compression dictionary is an existing dictionary;

creating the compression dictionary when the compression dictionary is not an existing dictionary; and

populating the compression dictionary during compression of the stream of data.

7. The method of claim 3, where the one or more compression rules include user-defined compression rules.

8. The method of claim 3, where the one or more compression rules include automatically-generated compression rules.

9. The method of claim 1, where transmitting the compression dictionary notification message, further comprises:

receiving an acknowledgement message from the receiving device in response to the compression dictionary notification message.

10. The method of claim 9, where transmitting the compressed stream of data to the receiving device is performed following receipt of the acknowledgement message.

11. The method of claim 1, where transmitting the compressed stream of data to the receiving device further comprises transmitting the compressed stream of data over a wide area network (WAN).

12. A device for compressing data over a network, the device comprising:

a processor to;

identify a compression dictionary associated with a received data stream, where the identified compression dictionary is one of a number of available compression dictionaries,

transmit, to a receiving device, a compression dictionary notification message, where the compression dictionary notification message comprises at least an initial sequence number associated with a compressed data stream and an identification of the compression dictionary used to compress the compressed data stream,

compress the received data stream using the identified compression dictionary to generate the compressed data stream, and

transmit the compressed data stream to the receiving device over the network.

13. The device of claim 12, where the network is a wide area network (WAN).

14. The device of claim 12, where, when identifying the compression dictionary associated with the received data stream, the processor is further to:

compare network characteristics of the received data stream to a number of compression rules, where each of the number of compression rules correlates the received data stream to individual ones of the number of available compression dictionaries based on the network characteristics.

15. The device of claim 14, where the number of available compression dictionaries includes a default compression dictionary, and

where, when identifying the compression dictionary associated with the received data stream, the processor is further to:

identify the default compression dictionary when the network characteristics of the received data stream do not match one of the number of compression rules.

16. A system comprising:

a transmitting network device to;

receive a data stream from a first local network, and

transmit a compressed data stream via a wide area network; and

a receiving network device to;

receive the compressed data stream from the wide area network,

the transmitting network device comprising logic to;

select a compression dictionary from a number of compression dictionaries based on the received data stream,

output a notification message to the receiving network device, where the notification message includes at least an identification of the compression dictionary and an initial sequence number associated with the compressed data stream and the identification of the compression dictionary,

receive an acknowledgement message from the receiving network device indicating receipt of the notification message,

compress the received data stream using the compression dictionary to form the compressed data stream, and

transmit the compressed data stream to the receiving network device via the wide area network;

the receiving network device comprising logic to;

receive the notification message from the transmitting network device,

identify the compression dictionary from the notification message,

transmit the acknowledgement message to the transmitting network device,

receive the compressed data stream, and

decompress the compressed data stream using the compression dictionary.

17. The system of claim 16, where, when selecting the compression dictionary, the logic of the transmitting network device is further to:

compare network characteristics of the received data stream to a number of compression rules, where each of the number of compression rules associates the received data stream to individual ones of the number of available compression dictionaries based on the network characteristics.