SESSION INITIATION PROTOCOL REGISTRATION WITH PING

• US 20090094361A1
• Filed: 09/26/2008
• Published: 04/09/2009
• Est. Priority Date: 10/05/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Srinivasan, Balasubramanian
• Granted Patent: US 9,083,722 B2
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 65/1073 Registration or de-registration
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/80 Responding to QoS

Abstract

Systems and methodologies are described that facilitate improving session initiation protocol based registration of a mobile device and an IP multimedia subsystem in wireless communications. The mobile device discovers one or more SIP servers (e.g., proxy call session control functions) that are available. The mobile device issues a ping message to each discovered server in parallel to determine reachability. Based at least in part on measured round trip times associated with the ping messages, the mobile device initiates registration procedures with at least one server.

Claims

1. A method for session initiation protocol registration, comprising:

discovering a plurality of proxy servers;

transmitting a ping message to each discovered proxy server, wherein the ping message solicits a return response;

measuring a round trip time associated with each ping message; and

initiating a registration procedure with at least one of the discovered proxy servers based upon measured round trip times.

2. The method of claim 1, wherein discovering the plurality of proxy servers comprises obtaining a list that includes the plurality of proxy servers.

3. The method of claim 1, wherein the transmission of ping messages to each discovered proxy server occurs in parallel.

4. The method of claim 1, further comprising issuing ping messages multiple times to collect a plurality of measurements for each discovered proxy server.

5. The method of claim 4, further comprising determining, based upon the plurality of measurements, at least one of an average round trip time, minimum round trip time, maximum round trip time, or median round trip time.

6. The method of claim 1, further comprising detecting return responses associated with each ping message to ascertain discovered proxy servers that are reachable.

7. The method of claim 6, further comprising ranking reachable proxy servers based upon measured round trip times.

8. The method of claim 7, wherein initiating the registration procedures comprises commencing registration with each reachable proxy server in turn starting with a proxy server associated with a minimum round trip time until a connection is established.

9. The method of claim 1, further comprising selecting a proxy server from the discovered proxy servers that corresponds to a minimum round trip time.

10. The method of claim 1, further comprising initiating registration procedures with a first server to respond to the ping messages.

11. The method of claim 10, further comprising retaining responses to ping messages received from servers other than the first server.

12. The method of claim 11, further comprising attempting registration with a second server that responded to the ping messages if registration failure occurs with the first server.

13. A communications apparatus for session initiation protocol registration, comprising:

means for discovering a plurality of proxy servers;

means for transmitting a ping message to each discovered proxy server, wherein the ping message solicits a return response;

means for measuring a round trip time associated with each ping message; and

means for initiating a registration procedure with at least one of the discovered proxy servers based upon measured round trip times.

14. A wireless communications apparatus, comprising:

a memory that retains instructions for;

discovering a plurality of proxy servers, transmitting a ping message to each discovered proxy server wherein the ping message solicits a return response, measuring a round trip time associated with each ping message, and initiating a registration procedure with at least one of the discovered proxy servers based upon measured round trip times; and

a processor, coupled to the memory, configured to execute the instructions retained in the memory.

15. The wireless communications apparatus of claim 14, wherein the memory further retains instructions for obtaining a list that includes the plurality of proxy servers.

16. The wireless communications apparatus of claim 14, wherein the transmission of ping messages to each discovered proxy server occurs in parallel.

17. The wireless communications apparatus of claim 14, wherein the memory further retains instructions for issuing ping messages multiple times to collect a plurality of measurements for each discovered proxy server.

18. The wireless communications apparatus of claim 17, wherein the memory further retains instructions for determining, based upon the plurality of measurements, at least one of an average round trip time, minimum round trip time, maximum round trip time, or median round trip time.

19. The wireless communications apparatus of claim 14, wherein the memory further retains instructions for detecting return responses associated with each ping message to ascertain discovered proxy servers that are reachable.

20. The wireless communications apparatus of claim 19, wherein the memory further retains instructions for ranking reachable proxy servers based upon measured round trip times.

21. The wireless communications apparatus of claim 20, wherein the memory further retains instructions for commencing registration with each reachable proxy server in turn starting with a proxy server associated with a minimum round trip time until a connection is established.

22. The wireless communications apparatus of claim 14, wherein the memory further retains instructions for selecting a proxy server from the discovered proxy servers that corresponds to a minimum round trip time.

23. The wireless communications apparatus of claim 14, wherein the memory further retains instructions for initiating registration procedures with a first server to respond to the ping messages.

24. The wireless communications apparatus of claim 23, wherein the memory further retains instructions for retaining responses to ping messages received from servers other than the first server.

25. The wireless communications apparatus of claim 24, wherein the memory further retains instructions for attempting registration with a second server that responded to the ping messages if registration failure occurs with the first server.

26. A computer program product, comprising:

a computer-readable medium comprising;

code for causing a computer to discover a plurality of proxy servers;

code for causing the computer to transmit a ping message to each discovered proxy server, wherein the ping message solicits a return response;

code for causing the computer to measure a round trip time associated with each ping message; and

code for causing the computer to initiate a registration procedure with at least one of the discovered proxy servers based upon measured round trip times.

27. An apparatus in a wireless communications system, comprising:

a processor configured to;

discover a plurality of proxy servers;

transmit a ping message to each discovered proxy server, wherein the ping message solicits a return response;

measure a round trip time associated with each ping message; and

initiate a registration procedure with at least one of the discovered proxy servers based upon measured round trip times.

28. A method for session initiation protocol registration of a mobile device, comprising:

receiving at least one ping message from a mobile device;

sending a return message to the mobile device in response to the at least one ping message; and

initiating registration with the mobile device based at least in part on a round trip time required to transmit and receive the at least one ping message and the return message.

29. The method of claim 28, further comprising registering with at least one server that includes a list of proxy servers.

30. The method of claim 29, wherein registering with the at least one server adds an entry to the list of servers.

31. A communications apparatus for session initiation protocol registration, comprising:

means for receiving at least one ping message from a mobile device;

means for sending a return message to the mobile device in response to the at least one ping message; and

means for initiating registration with the mobile device based at least in part on a round trip time required to transmit and receive the at least one ping message and the return message.

32. A wireless communications apparatus, comprising:

a memory that retains instructions for receiving at least one ping message from a mobile device, sending a return message to the mobile device in response to the at least one ping message, and initiating registration with the mobile device based at least in part on a round trip time required to transmit and receive the at least one ping message and the return message; and

a processor, coupled to the memory, configured to execute the instructions retained in the memory.

33. The wireless communications apparatus of claim 32, wherein the memory further retains instructions for registering with at least one server that includes a list of proxy servers.

34. The wireless communications apparatus of claim 33, wherein registering with the at least one server adds an entry to the list of servers.

35. A computer program product, comprising:

a computer-readable medium comprising;

code for causing a computer to receive at least one ping message from a mobile device;

code for causing the computer to send a return message to the mobile device in response to the at least one ping message; and

code for causing the computer to initiate registration with the mobile device based at least in part on a round trip time required to transmit and receive the at least one ping message and the return message.

36. An apparatus in a wireless communications system, comprising:

a processor configured to;

receive at least one ping message from a mobile device;

send a return message to the mobile device in response to the at least one ping message; and

initiate registration with the mobile device based at least in part on a round trip time required to transmit and receive the at least one ping message and the return message.