Method and apparatus for network optimization using SON solutions

• US 9,166,875 B2
• Filed: 06/21/2010
• Issued: 10/20/2015
• Est. Priority Date: 06/22/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Grilli, Francesco, Kitazoe, Masato, Flore, Oronzo, Wilborn, Thomas B., Mishra, Anjali
• Primary Examiner(s): SALAD, ABDULLAHI ELMI
• Application Number:
  US12/819,745
• Publication Number:
  US 20100325267A1
• Time in Patent Office: 1,947 Days
• Field of Search: 709223-224, 370/216, 455/436
• US Class Current: 1/1
• CPC Class Codes: H04L 41/069 using logs of notifications; Post-processing of notifications
• CPC Class Codes: H04L 41/0823 characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability for optimising operational conditions of wireless networks H04W24/02
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 36/0083 Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided in which a communication event is detected, one or more aspects of the detected communication event are analyzed and at least one of the one or more aspects of the detected communication event is stored on an user equipment in a log.

Claims

1. A method for wireless communication, comprising:

detecting, while a user equipment (UE) is in a connected state with a serving cell with communication occurring on an uplink and a downlink, an instance of handover failure;

storing, in response to detecting an instance of handover failure, the detected instance of handover failure together with at least one of the following related aspects in the UE in a UE log;

a time of the handover failure, a cell ID associated with the handover failure, a communication mode associated with the handover failure, and a duration for which a user equipment camps on a cell with a cell ID associated with the handover failure;

storing in the UE log, in response to detecting an instance of handover failure, information associated with at least one of a reference signal received power (RSRP) of the serving cell or a reference signal received quality (RSRQ) of the serving cell; and

storing in the UE log, in response to detecting an instance of handover failure, a data rate used by the UE,

wherein the UE log comprises the detected instance of handover failure and corresponding at least one related aspect, at least one RSRP information or RSRQ information, and data rate used by the UE.

2. The method of claim 1 further comprising reporting at least a portion of the log.

3. The method of claim 2, wherein the reporting further comprises reporting the log periodically.

4. The method of claim 2, wherein the reporting further comprises reporting the at least a portion of the log in response to a request from a SON server.

5. The method of claim 2, wherein the reporting is done using a control plane bearer.

6. The method of claim 2, wherein the reporting is done using a user plane bearer.

7. A method for wireless communication, comprising:

detecting, while a user equipment (UE) is in a connected state with a serving cell with communication occurring on an uplink and a downlink, an instance of cell edge experience, wherein detecting comprises comparing a user equipment receive signal with a threshold receive signal and indicating an instance of cell edge experience when the user equipment receive signal is less than the threshold receive signal for a time t or longer;

storing, in response to detecting an instance of cell edge experience, the detected instance of cell edge experience together with at least one of the following related aspects in the UE in a UE log;

a time of the cell edge experience, a cell ID associated with the cell edge experience, a location of the cell edge experience, a use of MCS, bandwidth, HARQ termination information and MAC layer ACK/NAK information;

storing in the UE log, in response to detecting an instance of cell edge experience, information associated with at least one of a reference signal received power (RSRP) of the serving cell or a reference signal received quality (RSRQ) of the serving cell; and

storing in the UE log, in response to detecting an instance of cell edge experience, a data rate used by the UE,

wherein the UE log comprises the detected instance of cell edge experience and corresponding at least one related aspect, at least one RSRP information or RSRQ information, and data rate used by the UE.

8. A method for wireless communication, comprising:

detecting, while a user equipment (UE) is in a connected state with a serving cell with communication occurring on an uplink and a downlink, an instance of out-of-service experience;

storing, in response to detecting an instance of out-of-service experience, the detected instance of out-of-service experience together with at least one of the following related aspects in the UE in a UE log;

a time of the out-of-service experience, a cell ID associated with the out-of-service experience, a communication mode associated with the out-of-service experience, and a duration for which a user equipment has experienced the out-of-service experience and the cell ID at which the user equipment experienced the out-of-service experience;

storing in the UE log, in response to detecting an instance of out-of-service experience, information associated with at least one of a reference signal received power (RSRP) of the serving cell or a reference signal received quality (RSRQ) of the serving cell; and

storing in the UE log, in response to detecting an out-of-service experience, a data rate used by the UE,

wherein the UE log comprises the detected instance of out-of-service experience and corresponding at least one related aspect, at least one RSRP information or RSRQ information, and data rate used by the UE.

9. The method of claim 8, wherein the communication mode further comprises at least one of an idle mode or a connected mode.

10. A non-transitory computer-readable medium storing computer executable code for:

detecting, while a user equipment (UE) is in a connected state with a serving cell with communication occurring on an uplink and a downlink, an instance of handover failure;

storing, in response to detecting an instance of handover failure, the detected instance of handover failure together with at least one of the following related aspects in the UE in a UE log;

a time of the handover failure, a cell ID associated with the handover failure, a communication mode associated with the handover failure, and a duration for which a user equipment camps on a cell with a cell ID associated with the handover failure;

storing in the UE log, in response to detecting an instance of handover failure, information associated with at least one of a reference signal received power (RSRP) of the serving cell or a reference signal received quality (RSRQ) of the serving cell; and

storing in the UE log, in response to detecting an instance of handover failure, a data rate used by the UE,

wherein the UE log comprises the detected instance of handover failure and corresponding at least one related aspect, at least one RSRP information or RSRQ information, and data rate used by the UE.

11. The computer program product of claim 10, further comprising reporting at least a portion of the log.

12. The computer program product of claim 10, wherein the reporting further comprises reporting the log periodically.

13. The computer program product of claim 10, wherein the reporting further comprises reporting the at least a portion of the log in response to a request from a SON server.

14. The computer program product of claim 10, wherein the reporting is done using a control plane bearer.

15. The computer program product of claim 10, wherein the reporting is done using a user plane bearer.

16. A non-transitory computer-readable medium storing computer executable code for:

detecting, while a user equipment (UE) is in a connected state with a serving cell with communication occurring on an uplink and a downlink, an instance of cell edge experience, wherein detecting comprises comparing a user equipment receive signal with a threshold receive signal and indicating an instance of cell edge experience when the user equipment receive signal is less than the threshold receive signal for a time t or longer;

storing, in response to detecting an instance of cell edge experience, the detected instance of cell edge experience together with at least one of the following related aspects in the UE in a UE log;

a time of the cell edge experience, a cell ID associated with the cell edge experience, a location of the cell edge experience, a use of MCS, bandwidth, HARQ termination information and MAC layer ACK/NAK information;

storing in the UE log, in response to detecting an instance of cell edge experience, information associated with at least one of a reference signal received power (RSRP) of the serving cell or a reference signal received quality (RSRQ) of the serving cell; and

storing in the UE log, in response to detecting an instance of cell edge experience, a data rate used by the UE,

wherein the UE log comprises the detected instance of cell edge experience and corresponding at least one related aspect, at least one RSRP information or RSRQ information, and data rate used by the UE.

17. A non-transitory computer-readable medium storing computer executable code for:

detecting, while a user equipment (UE) is in a connected state with a serving cell with communication occurring on an uplink and a downlink, an instance of out-of-service experience;

storing, in response to detecting an instance of out-of-service experience, the detected instance of out-of-service experience together with at least one of the following related aspects in the UE in a UE log;

a time of the out-of-service experience, a cell ID associated with the out-of-service experience, a communication mode associated with the out-of-service experience, and a duration for which a user equipment has experienced the out-of-service experience and the cell ID at which the user equipment experienced the out-of-service experience;

storing in the UE log, in response to detecting an instance of out-of-service experience, information associated with at least one of a reference signal received power (RSRP) of the serving cell or reference signal received quality (RSRQ) of the serving cell; and

storing in the UE log, in response to detecting an out-of-service experience, a data rate used by the UE,

wherein the UE log comprises the detected instance of out-of-service experience and corresponding at least one related aspect, at least one RSRP information or RSRQ information, and data rate used by the UE.

18. An apparatus for wireless communication, comprising:

at least one processor; and

a memory coupled to the at least one processor, wherein the at least one processor is configured to;

detect, while a user equipment (UE) is in a connected state with a serving cell with communication occurring on an uplink and a downlink, an instance of handover failure;

store, in response to detecting an instance of handover failure, the detected instance of handover failure together with at least one of the following related aspects in the UE in a UE log;

a time of the handover failure, a cell ID associated with the handover failure, a communication mode associated with the handover failure, and a duration for which a user equipment camps on a cell with a cell ID associated with the handover failure;

store in the UE log, in response to detecting an instance of handover failure, information associated with at least one of a reference signal received power (RSRP) of the serving cell or a reference signal received quality (RSRQ) of the serving cell; and

store in the UE log, in response to detecting an instance of handover failure, a data rate used by the UE,

wherein the UE log comprise the detected instance of handover failure and its corresponding at least one related aspect, at least one RSRP information or RSRQ information, and data rate used by the UE.

19. The apparatus claim 18, wherein the at least one processor is further configured to:

report at least a portion of the log.

20. The apparatus of claim 19, wherein the at least one processor is further configured to:

report the log periodically.

21. The apparatus of claim 19, wherein the at least one processor is further configured to:

report the at least a portion of the log in response to a request from a SON server.

22. An apparatus for wireless communication, comprising:

at least one processor; and

a memory coupled to the at least one processor, wherein the at least one processor is configured to;

detect, while a user equipment (UE) is in a connected state with a serving cell with communication occurring on an uplink and a downlink, an instance of cell edge experience;

store, in response to detecting an instance of cell edge experience, the detected instance of cell edge experience together with at least one of the following related aspects in the UE in a UE log;

a time of the cell edge experience, a cell ID associated with the cell edge experience, a location of the cell edge experience, a use of MCS, bandwidth, HARQ termination information and MAC layer ACK/NAK information;

store in the UE log, in response to detecting an instance of cell edge experience, information associated with at least one of a reference signal received power (RSRP) of the serving cell or a reference signal received quality (RSRQ) of the serving cell; and

store in the UE log, in response to detecting an instance of cell edge experience, a data rate used by the UE,

wherein the UE log comprises the detected instance of cell edge experience and corresponding at least one related aspect, at least one RSRP information or RSRQ information, and data rate used by the UE.

23. The apparatus of claim 22, wherein the at least one processor is further configured to compare a user equipment receive signal with a threshold receive signal and indicate an instance of cell edge experience when the user equipment receive signal is less than the threshold receive signal for a time t or longer.

24. The apparatus of claim 22, wherein the at least one processor is further configured to compare a user equipment receive signal with a threshold receive signal and indicate an instance of cell edge experience when there is a drop in a supported data rate to a very low data rate.

25. The apparatus of claim 22, wherein the at least one processor is further configured to compare a user equipment receive signal with a threshold receive signal and indicate an instance of cell edge experience when there is a large number of CRC failures.

26. An apparatus for wireless communication, comprising:

at least one processor; and

a memory coupled to the at least one processor, wherein the at least one processor is configured to;

detect, while a user equipment (UE) is in a connected state with a serving cell with communication occurring on an uplink and a downlink, an instance of out-of-service experience;

store, in response to detecting an instance of out-of-service experience, the detected instance of out-of-service experience together with at least one of the following related aspects in the UE in a UE log;

a time of the out-of-service experience, a cell ID associated with the out-of-service experience, a communication mode associated with the out-of-service experience, and a duration for which a user equipment has experienced the out-of-service experience and the cell ID at which the user equipment experienced the out-of-service experience;

store in the UE log, in response to detecting an instance of out-of-service experience, information associated with at least one of a reference signal received power (RSRP) of the serving cell or a reference signal received quality (RSRQ) of the serving cell; and

storing in the UE log, in response to detecting an out-of-service experience, a data rate used by the UE,

wherein the UE log comprises the detected instance of out-of-service experience and corresponding at least one related aspect, at least one RSRP information or RSRQ information, and data rate used by the UE.

27. The apparatus of claim 26, wherein the communication mode further comprises at least one of an idle mode or a connected mode.