Packet routing based on application source

• US 20080239961A1
• Filed: 03/30/2007
• Published: 10/02/2008
• Est. Priority Date: 03/30/2007
• Status: Abandoned Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Watson, Eric B., Hilerio, Israel, Satkunanathan, Lingan, Levidow, Bjorn B.
• Application Number:
  US11/731,220
• Publication Number:
  US 20080239961A1
• Time in Patent Office: Days
• US Class Current: 370/235
• CPC Class Codes: H04L 41/5009 Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
• CPC Class Codes: H04L 41/5022 by giving priorities, e.g. assigning classes of service
• CPC Class Codes: H04L 43/08 Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/302 Route determination based on requested QoS
• CPC Class Codes: H04L 45/306 Route determination based on the nature of the carried application
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/2433 Allocation of priorities to traffic types
• CPC Class Codes: H04L 47/2475 for supporting traffic characterised by the type of applications
• CPC Class Codes: H04L 47/32 by discarding or delaying data units, e.g. packets or frames

Abstract

A traffic manager may monitor network performance, detect that the network performance has changed, and may prioritize network traffic based on which application or function is associated with the traffic. Each packet of network traffic may be analyzed to determine a source application or source function and allowed or disallowed along the network based on a set of predetermined priorities. Several sets of priorities may be established for various network performance conditions. In some embodiments, traffic may be routed along different paths using the sets of priorities and the source application or function. The traffic manager is adaptable for web-based services, applications, or other functions provided over a network connection.

Claims

1. A method comprising:

detecting a change in a first network performance parameter on a first network connection;

determining a set of priorities for a plurality of applications;

analyzing an outgoing packet to determine a source application for said packet;

determining a packet priority for said outgoing packet based on said set of priorities and said source application; and

routing said outgoing packet based on said packet priority.

2. The method of claim 1, said routing comprising:

sending said outgoing packet when said packet priority is high; and

dropping said outgoing packet when said packet priority is low.

3. The method of claim 1, said routing comprising:

sending said outgoing packet on a second network connection when said packet priority is high.

4. The method of claim 1, said routing comprising:

sending said outgoing packet on a second network connection when said packet priority is low.

5. The method of claim 1, said set of priorities comprising application functions, said method further comprising:

analyzing said outgoing packet to determine a first application function associated with said outgoing packet; and

routing said outgoing packet.

6. The method of claim 1, said set of priorities comprising user priorities, said method further comprising:

analyzing said output packet to determine a first user associated with said outgoing packet; and

routing said outgoing packet.

7. The method of claim 1, said analyzing further comprising analyzing data contents of said packet.

8. A computer readable medium comprising computer executable instructions adapted to perform the method of claim 1.

9. A system comprising:

a first monitor for a first network connection adapted to determine a performance parameter for said first network connection;

a priority engine adapted to;

analyze an outgoing packet to be sent over said first network connection to determine a first source application for said outgoing packet;

apply a transmission policy for said outgoing packet; and

transmit said outgoing packet over said first network connection based on said transmission policy.

10. The system of claim 9, said performance parameter comprising at least one of a group composed of:

latency, jitter, packet loss, data throughput, dripped packets, out of order delivery, and bit error rate.

11. The system of claim 9, said priority adapted further adapted to route said outgoing packet through a second network connection based on said transmission policy.

12. The system of claim 9, said transmission policy comprising priorities based at least one of a group composed of:

a user for said outgoing packet, a function associated with said outgoing packet, a port for said outgoing packet, and data contained within said outgoing packet.

13. The system of claim 9 further comprising a second monitor for a second network connection.

14. A method comprising:

monitoring a first performance parameter for a first network connection;

detecting a change in said first performance parameter;

determining a first policy and a second policy for a plurality of applications, said first policy and said second policy comprising a priority for said plurality of applications, said plurality of applications comprising at least one application delivered over said first network connection;

changing a current policy from said first policy to said second policy based on said change in said first performance parameter;

analyzing an outgoing packet to determine an application source; and

routing said packet based on said current policy and said application source.

15. The method of claim 14, said first policy being adapted to allow all packets to be transmitted.

16. The method of claim 14, said plurality of applications comprising at least one of a group composed of:

email applications, backup applications, web browsing applications, file transfer protocol applications, virtual private network connection applications, telephony applications, and remote access applications.

17. The method of claim 14, said routing comprising dropping said outgoing packet when said outgoing packet is from a low priority application.

18. The method of claim 14, said first policy and said second policy further comprising a priority for a plurality of functions associated with said plurality of applications.

19. The method of claim 14, said analyzing and outgoing packet being performed by analyzing the data contents of said outgoing packet.

20. The method of claim 14, said at least one application comprising a web-based delivery mechanism.