Prioritized control packet delivery for transmission control protocol (TCP)

• US 20070091900A1
• Filed: 10/20/2005
• Published: 04/26/2007
• Est. Priority Date: 10/20/2005
• Status: Abandoned Application

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Addagatla, Sreenivas, Gopalakrishnan, Jagdish, Asthana, Sarvesh
• Application Number:
  US11/254,345
• Publication Number:
  US 20070091900A1
• Time in Patent Office: Days
• US Class Current: 370/395.42
• CPC Class Codes: H04L 45/304 Route determination for signalling traffic
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/193 at the transport layer, e.g. TCP related
• CPC Class Codes: H04L 47/245 using preemption
• CPC Class Codes: H04L 47/2466 using signalling traffic
• CPC Class Codes: H04L 47/2475 for supporting traffic characterised by the type of applications
• CPC Class Codes: H04L 47/33 using forward notification
• 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 69/163 In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

A method is provided for transmitting data, wherein control packets are given priority with respect to application data packets. In general, this is accomplished by establishing a separate, distinct link flow over which only control packets (e.g., TCP control packets) will be transmitted. A higher priority is associated with this link flow. In addition, the reliability of control packets sent over the dedicated link flow can be improved upon by increasing the number of retransmissions associated with the control packets and/or decreasing the window of time before the retransmissions are sent. A system, mobile terminal, network entity, and computer program product for implementing the method are also provided.

Claims

1. A method of transmitting one or more control packets and one or more application data packets, said method comprising:

associating a first link flow with transmission of the one or more control packets;

associating a second link flow with transmission of the one or more application data packets;

transmitting one or more control packets over the first link flow; and

transmitting one or more application data packets over the second link flow, wherein the one or more control packets have a higher priority than the one or more application data packets, and wherein transmitting the one or more control packets over the first link flow comprises transmitting the one or more control packets with the higher priority over the first link flow.

2. The method of claim 1, wherein the first link flow is more highly prioritized than the second link flow.

3. The method of claim 1 further comprising:

including a marking with respective control packets to indicate the priority of the control packets.

4. The method of claim 1, wherein the control packets comprise transmission control protocol (TCP) control packets, and wherein the application data packets comprise TCP application data packets.

5. The method of claim 4 further comprising:

receiving a request for establishment of a TCP socket, wherein the steps of associating the first link flow with transmission of the one or more control packets and associating the second link flow with transmission of the one or more application data packets are automatically performed in response to receiving said request.

6. The method of claim 4 further comprising:

defining a number of times a link layer frame containing a TCP control packet will be retransmitted, wherein the number of times the frame will be retransmitted is greater than a number of times a link layer frame containing a TCP application data packet will be retransmitted.

7. The method of claim 4 further comprising:

defining a window of time before which a link layer frame containing a TCP control packet will be retransmitted, wherein the window of time is shorter than a window of time before which a link layer frame containing a TCP application data packet will be retransmitted.

8. The method of claim 1, wherein transmitting one or more control packets with the higher priority over the first link flow comprises transmitting the control packets sooner than the application data packets.

9. The method of claim 3, wherein transmitting one or more control packets comprises transmitting the control packets from a mobile terminal to an intermediate agent, and wherein the marking indicates to the intermediate agent the priority of the one or more control packets.

10. The method of claim 9 further comprising:

establishing a packet filter at the intermediate agent, said packet filter capable of being used by the intermediate agent to route one or more control packets intended for the mobile terminal over the first link flow in accordance with the priority of the control packets.

11. The method of claim 9, wherein the intermediate agent comprises a Packet Data Serving Node.

12. The method of claim 9, wherein the priority of the control packets is based at least in part on a level of service to be provided to a user associated with the mobile terminal.

13. A mobile terminal capable of transmitting one or more control packets and one or more application data packets, said mobile terminal comprising:

a processor; and

a memory in communication with the processor, said memory comprising an application executable by the processor, wherein the application is capable, upon execution, of associating a first link flow with transmission of the one or more control packets and associating a second link flow with transmission of the one or more application data packets, said application further capable, upon execution, of transmitting one or more control packets over the first link flow and transmitting one or more application data packets over the second link flow, wherein the one or more control packets have a higher priority than the one or more application data packets, and wherein transmitting the one or more control packets over the first link flow comprises transmitting the one or more control packets with the higher priority over the first link flow.

14. The mobile terminal of claim 13, wherein the first link flow is more highly prioritized than the second link flow.

15. The mobile terminal of claim 13, wherein the application is further capable, upon execution, of including a marking with respective control packets to indicate the priority of the control packets.

16. The mobile terminal of claim 13, wherein the control packets comprise transmission control protocol (TCP) packets, and wherein the application data packets comprise TCP application data packets.

17. The mobile terminal of claim 16, wherein the application is further capable, upon execution, of receiving a request for establishment of a TCP socket, and wherein associating the first and second link flows with the control packets and the application data packets, respectively, comprises automatically associating the first and second link flows with the control packets and application data packets, respectively, in response to receiving the request.

18. The mobile terminal of claim 16 wherein the application is further capable, upon execution, of defining a number of times a link layer frame containing a TCP control packet will be retransmitted, wherein the number of times the frame will be retransmitted is greater than a number of times a link layer frame containing a TCP application data packet will be retransmitted.

19. The mobile terminal of claim 16, wherein the application is further capable, upon execution, of defining a window of time before which a link layer frame containing a TCP control packet will be retransmitted, wherein the window of time is shorter than a window of time before which a link layer frame containing a TCP application data packet will be retransmitted.

20. The mobile terminal of claim 13, wherein transmitting one or more control packets with the higher priority over the first link flow comprises transmitting the control packets sooner than the application data packets.

21. The mobile terminal of claim 15, wherein transmitting one or more control packets comprises transmitting the control packets to an intermediate agent, and wherein the marking indicates to the intermediate agent the priority of the one or more control packets.

22. The mobile terminal of claim 21, wherein the application is further capable, upon execution, of establishing a packet filter at the intermediate agent, said packet filter capable of being used by the intermediate agent to route one or more control packets intended for the mobile terminal over the first link flow in accordance with the priority of the control packets.

23. The mobile terminal of claim 21, wherein the intermediate agent comprises a Packet Data Serving Node.

24. The mobile terminal of claim 13, wherein the priority of the control packets is based at least in part on a level of service to be provided to a user associated with the mobile terminal.

25. A system for transmitting one or more control packets and one or more application data packets, said system comprising:

a mobile terminal capable of associating a first link flow with the one or more control packets and associating a second link flow with the one or more application data packets, said mobile terminal further capable of transmitting one or more control packets over the first link flow and transmitting one or more application data packets over the second link flow, wherein the one or more control packets have a higher priority than the one or more application data packets, and wherein transmitting the one or more control packets over the first link flow comprises transmitting the one or more control packets with the higher priority over the first link flow; and

a network entity in communication with the mobile terminal, said network entity capable of receiving the one or more control packets with the higher priority from the mobile terminal.

26. The system of claim 25, wherein the first link flow is more highly prioritized than the second link flow.

27. The system of claim 25, wherein the mobile terminal is further capable of including a marking with respective control packets to indicate the priority of the control packets.

28. The system of claim 25, wherein the control packets comprise transmission control protocol (TCP) control packets and the application data packets comprise TCP application data packets.

30. The system of claim 28, wherein the mobile terminal is further capable of defining a number of times a link layer frame containing a TCP control packet will be retransmitted, wherein the number of times the frame will be retransmitted is greater than a number of times a link layer frame containing a TCP application data packet will be retransmitted.

31. The system of claim 28, wherein the mobile terminal is further capable of defining a window of time before which a link layer frame containing a TCP control packet will be retransmitted, wherein the window of time is shorter than a window of time before which a link layer frame containing a TCP application data packet will be retransmitted.

32. The system of claim 25, wherein transmitting one or more control packets with the higher priority over the first link flow comprises transmitting the control packets sooner than the application data packets.

33. The system of claim 25, wherein the mobile terminal is further capable of establishing a packet filter at the network entity, and wherein the network entity is further capable of using the packet filter to route one or more control packets intended for the mobile terminal over the first link flow in accordance with the priority of the control packets.

34. The system of claim 25, wherein the network entity comprises a Packet Data Serving Node.

29. The system of 28, wherein associating the first and second link flows with the one or more control packets and the one or more application data packets, respectively, comprises automatically associating the first and second link flows in response to receiving a request from a TCP client application operating on the mobile terminal for establishment of a TCP socket.

35. A network entity capable of sending and receiving one or more control packets with a higher priority than one or more application data packets, the network entity comprising:

a processor; and

a memory in communication with the processor, said memory storing an application executable by the processor, wherein the application is capable, upon execution, of receiving one or more control packets over a control link flow and one or more application data packets over an application data link flow, said application further capable, upon execution, of interpreting a marking included with respective control packets received to determine a priority of the respective control packets, and the application further capable, upon execution, of transmitting the control packets received in accordance with the priority.

36. The network entity of claim 35, wherein the control packets are transmission control protocol (TCP) control packets and the application data packets are TCP application data packets.

37. The network entity of claim 36, wherein the TCP control packets and the TCP application data packets are received from a mobile terminal over the control link flow and the application data link flow, respectively.

38. The network entity of claim 37, wherein the application is further capable, upon execution, of receiving one or more TCP packets intended for the mobile terminal, said TCP packets comprising one or more TCP control packets and one or more TCP application data packets, said application further capable, upon execution, of filtering the TCP packets received in order to isolate the one or more TCP control packets, and said application further capable, upon execution, of transmitting the one or more TCP control packets to the mobile terminal over the control link flow in accordance with the prioritization.

39. A computer program product for transmitting one or more control packets and one or more application data packets, wherein the computer program product comprises at least one computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program portions comprising:

a first executable portion for associating a first link flow with the one or more control packets;

a second executable portion for associating a second link flow with the one or more application data packets;

a third executable portion for transmitting one or more control packets over the first link flow; and

a fourth executable portion for transmitting one or more application data packets over the second link flow, wherein the one or more control packets have a higher priority than the one or more application data packets, and wherein transmitting the one or more control packets over the first link flow comprises transmitting the one or more control packets with the higher priority over the first link flow.

40. The computer program product of claim 39, wherein the first link flow is more highly prioritized than the second link flow.

41. The computer program product of claim 39 further comprising:

a fifth executable portion for including a marking with respective control packets to indicate the priority of the control packets.

42. The computer program product of claim 39, wherein the control packets comprise transmission control protocol (TCP) packets, and wherein the application data packets comprise TCP application data packets.

43. The computer program product of claim 42 further comprising:

a fifth executable portion for receiving a request for establishment of a TCP socket, and wherein associating a first and second link flow with the one or more control packets and one or more application data packets, respectively, comprises automatically associating the first and second link flows in response to receiving the request.

44. The computer program product of claim 42 further comprising:

a fifth executable portion for defining a number of times a link layer frame containing a TCP control packet will be retransmitted, wherein the number of times the frame will be retransmitted is greater than a number of times a link layer frame containing a TCP application data packet will be retransmitted.

45. The computer program product of claim 42 further comprising:

a fifth executable portion for defining a window of time before which a link layer frame containing a TCP control packet will be retransmitted, wherein the window of time is shorter than a window of time before which a link layer frame containing a TCP application data packet will be retransmitted.

46. The computer program product of claim 39, wherein transmitting one or more control packets with the higher priority over the first link flow comprises transmitting the control packets sooner than the application data packets.

47. The computer program product of claim 41, wherein transmitting one or more control packets comprises transmitting the control packets from a mobile terminal to an intermediate agent, and wherein the marking indicates to the intermediate agent the priority of the control packets.

48. The computer program product of claim 47 further comprising:

a sixth executable portion for establishing a packet filter at the intermediate agent, said packet filter capable of being used by the intermediate agent to route one or more control packets intended for the mobile terminal over the first link flow in accordance with the priority of the control packets.

49. The computer program product of claim 47, wherein the intermediate agent comprises a Packet Data Serving Node.

50. The computer program product of claim 47, wherein the priority of the control packets is based at least in part on a level of service to be provided to a user associated with the mobile terminal.