Stateful and stateless data processing

• US 7,881,215 B1
• Filed: 09/30/2004
• Issued: 02/01/2011
• Est. Priority Date: 03/18/2004
• Status: Active Grant

• Current Assignee: Avaya Incorporated
• Original Assignee: Avaya Incorporated
• Inventors: Emond, Donald, Payson, Christopher, Liu, Ying, Bastian, Thomas, Zhang, Chang Tony, Penno, Reinaldo, Daigle, Russell L.
• Primary Examiner(s): Ngo, Ricky
• Assistant Examiner(s): Sinkantarakorn, Pao
• Application Number:
  US10/955,890
• Time in Patent Office: 2,315 Days
• Field of Search: 370/389, 370/392, 370473-476, 370252-253, 709/220, 709/223, 709/224
• US Class Current: 370/252
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/142 Managing session states for stateless protocols; Signalling session states; State transitions; Keeping-state mechanisms

Abstract

The present invention provides systems and methods enabling network nodes to process data in a more efficient manner. In one aspect, the present invention analyzes data processed in a network node and determines whether the data requires processing in a stateful mode. If the data does not require processing in a stateful mode, the present invention processes the data in a stateless mode thereby saving processing resources. Embodiments of the present invention permit selection of processing modes in both manual and dynamic manners. Further, the determination of whether to process data in a stateful or a stateless mode may be made in response to various stimuli.

Claims

1. A method of processing data in a data network node, comprising;

a) receiving a data packet which includes state information;

b) analyzing the data packet;

c) determining whether the data packet requires stateful processing; and

d) if the data packet requires stateful processing, maintaining the state information, and if the data packet does not require stateful processing, discarding the state information,

wherein the determining step further comprises comparing a packet characteristic of the data packet to a processing policy set; and

wherein the processing policy set comprises a list of packet characteristics requiring stateful processing and a list of connection types requiring stateful processing; and

wherein the processing policy set is dynamically determined by network conditions.

2. The method of claim 1, wherein the analyzing step further comprises:

a) reading information contained in the data packet; and

b) assigning at least one packet characteristic to the data packet based on the information contained in the data packet.

3. The method of claim 1, wherein the analyzing step further comprises reading packet header information contained in the data packet.

4. The method of claim 1, wherein the analyzing step further comprises reading payload information contained in the data packet.

5. The method of claim 4, wherein the analyzing step further comprises determining a program type with which the data packet is associated based on the payload information.

6. The method of claim 5, wherein the analyzing step further comprises assigning at least one packet characteristic based on the program type with which the data packet is associated.

7. The method of claim 1, wherein stateful processing comprises maintaining historical information about the data packet.

8. A method of processing data in a data network node, comprising;

a) receiving a data packet which includes state information;

b) analyzing the data packet;

c) determining whether the data packet requires stateful processing; and

d) if the data packet requires stateful processing, maintaining the state information, and if the data packet does not require stateful processing, discarding the state information,

wherein the determining step further comprises comparing a packet characteristic of the data packet to a processing policy set; and

wherein the processing policy set comprises a list of packet characteristics requiring stateful processing and a list of connection types requiring stateful processing; and

wherein the processing policy set is dynamically determined by a time schedule.

9. The method of claim 8, wherein the analyzing step further comprises:

a) reading information contained in the data packet; and

b) assigning at least one packet characteristic to the data packet based on the information contained in the data packet.

10. The method of claim 8, wherein the analyzing step further comprises reading packet header information contained in the data packet.

11. The method of claim 8, wherein the analyzing step further comprises reading payload information contained in the data packet.

12. The method of claim 11, wherein the analyzing step further comprises determining a program type with which the data packet is associated based on the payload information.

13. The method of claim 12, wherein the analyzing step further comprises assigning at least one packet characteristic based on the program type with which the data packet is associated.

14. A system for processing data in a data network node, comprising:

a) an interface disposed to communicate with a packet network;

b) a control system, associated with the interface, configured to;

i) receive a data packet which includes state information;

ii) analyze the data packet;

iii) determine whether the data packet requires stateful processing; and

iv) if the data packet requires stateful processing, maintaining the state information, and if the data packet does not require stateful processing, discarding the state information;

wherein the control system is further configured to compare a packet characteristic of the data packet to a processing policy set; and

wherein the processing policy set comprises a list of packet characteristics requiring stateful processing and a list of connection types requiring stateful processing; and

wherein the processing policy set is dynamically determined by network conditions.

15. The system of claim 14, wherein the control system is further configured to read information contained in the data packet and assign at least one packet characteristic to the data packet based on the information contained in the data packet.

16. The system of claim 14, wherein the control system is further configured to analyze the data packet by reading packet header information contained in the data packet.

17. The system of claim 14, wherein the control system is further configured to analyze the data packet by reading payload information contained in the data packet.

18. The system of claim 17, wherein the control system is further configured to analyze the data packet by determining a program type with which the data packet is associated based on the payload information.

19. The system of claim 18, wherein the analyzing step further comprises assigning at least one packet characteristic based on the program type with which the data packet is associated.

20. The system of claim 14, wherein stateful processing comprises maintaining historical information about the data packet.

21. A system for processing data in a data network node, comprising:

a) an interface disposed to communicate with a packet network;

b) a control system, associated with the interface, configured to;

i) receive a data packet which includes state information;

ii) analyze the data packet;

iii) determine whether the data packet requires stateful processing; and

iv) if the data packet requires stateful processing, maintaining the state information, and if the data packet does not require stateful processing, discarding the state information;

wherein the control system is further configured to compare a packet characteristic of the data packet to a processing policy set; and

wherein the processing policy set comprises a list of packet characteristics requiring stateful processing and a list of connection types requiring stateful processing; and

wherein the processing policy set is dynamically determined by a time schedule.