Method and apparatus for testing a radio in a base station without using a radio test unit

• US 5,570,373 A
• Filed: 03/20/1995
• Issued: 10/29/1996
• Est. Priority Date: 03/20/1995
• Status: Expired due to Fees

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Wing, Thomas E.
• Primary Examiner(s): Beausoliel, Jr., Robert W.
• Assistant Examiner(s): CHUNG, PHUNG M
• Application Number:
  US08/407,728
• Time in Patent Office: 589 Days
• Field of Search: 371/5.1, 371/5.2, 371/25.1, 371/62, 370/13, 370/17, 370/13.1, 370/14, 370/95.1, 370/95.3, 375/224, 379/110, 379/113, 455/67.1, 455/67.7, 455/54.1
• US Class Current: 455/423
• CPC Class Codes: H04B 17/18 Monitoring during normal operation
• CPC Class Codes: H04B 17/19 Self-testing arrangements
• CPC Class Codes: H04B 17/20 of receivers
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

Testing of the operation of a radio in a base station of a wireless communication network may be achieved without removing the radio from service and without utilizing a separate test radio. Data concerning call processing activities are collected during wireless communications. A failure condition on an overhead or traffic channel of a radio is identified by suitably accessing the collected data, processing the data and then comparing the results to expected values.

Claims

1. A method for testing a radio in a base station of a wireless communication network comprising the steps of:

detecting a wireless communication in progress between the radio and a mobile station in the network;

collecting data concerning call processing activities associated with detecting frames in error on a traffic channel of the radio during the course of the wireless communication between the radio and the mobile station;

computing a frame error rate value from the collected data values;

setting an expected frame error rate value;

comparing the computed frame error rate value to the expected frame error rate value for purposes of determining whether the radio is operating properly; and

,

providing an indication that the radio is failing.

2. The method of claim 1, wherein the step of collecting data is performed at the mobile station in the network.

3. The method of claim 1, wherein the step of collecting data is performed at the base station.

4. The method of claim 1, wherein the step of collecting data is performed at the base station and the mobile station.

5. An apparatus for testing a radio in a base station of a wireless communication network, wherein the network comprises a plurality of mobile stations, the apparatus comprising:

a detector for detecting a wireless communication in progress between the radio and the mobile station in the network,

a memory for storing data concerning call processing activities associated with frames detected in error on a traffic channel of the radio which are collected during the course of a wireless communication between the radio and the mobile station, and for storing an expected frame error rate value;

a processor for computing a frame error rate value from the collected data values and for comparing the computed frame error rate value to the expected frame error rate value in order to determine whether the radio is operating properly; and

,

an indicator for indicating that the radio is failing.

6. The apparatus of claim 5, wherein the indicator is an audible alarm means which provides an audible signal when the radio is determined to be failing.

7. The apparatus of claim 5, wherein the indicator is a visual display means which provides an audible signal when the radio is deemed failing.

8. The apparatus of claim 5, wherein the apparatus is included in the base station of the radio under test.

9. The apparatus of claim 5, wherein the apparatus is included in a base station in the network that does not contain the radio under test.

10. The apparatus of claim 5, wherein the apparatus is included in a mobile switching center of the network.

11. The apparatus of claim 5, wherein the data concerning call processing activities are collected at the mobile station in the network.

12. The apparatus of claim 5, wherein the data concerning call processing activities are collected at the base station.

13. The apparatus of claim 5, wherein the data concerning call processing activities are collected at the mobile station and the base station.

14. A method for testing a radio in a base station of a wireless communication network comprising the steps of:

detecting a wireless communication in progress between the radio and a mobile station in the network;

collecting data concerning selected call processing activities during the course of the wireless communication between the radio and the mobile station;

processing the collected data values; and

,

comparing the processed data values to expected values for purposes of determining whether the radio is operating properly.

15. The method of claim 14, wherein the step of collecting data is performed at the mobile station in the network.

16. The method of claim 14, wherein the step of collecting data is performed at the base station.

17. The method of claim 14, wherein the step of collecting data is performed at the base station and the mobile station.

18. The method of claim 14, wherein the radio operates over traffic channels.

19. The method of claim 18, wherein the call processing activities data are collected for testing the operation of an uplink channel operation of the radio.

20. The method of claim 18, wherein the call processing activities data are collected for testing the operation of a downlink channel of the radio.

21. The method of claim 14, wherein the radio operates over overhead channels.

22. The method of claim 21, wherein the call processing activities data are collected for testing the operation of a pilot signal channel of the radio.

23. The method of claim 14, further comprising the step:

providing an indication whether the radio is operating properly.

24. An apparatus for testing a radio in a base station of a wireless communication network, wherein the network comprises a plurality of mobile stations, the apparatus comprising:

a detector for detecting a wireless communication in progress between the radio and the mobile station in the network,

a memory for storing data concerning selected call processing activities which are collected during the course of a wireless communication between the radio and the mobile station;

a processor for processing the collected data values stored in the memory and comparing the processed data to expected values in order to determine whether the radio is operating properly; and

,

an indicator for indicating the operating condition of the radio.

25. The apparatus of claim 24, wherein the apparatus is included in the base station of the radio under test.

26. The apparatus of claim 24, wherein the apparatus is included in a base station in the network that does not contain the radio under test.

27. The apparatus of claim 24, wherein the apparatus is included in a mobile switching center of the network.

28. The apparatus of claim 24, wherein the data concerning call processing activities are collected at the mobile station in the network.

29. The apparatus of claim 24, wherein the data concerning call processing activities are collected at the base station.

30. The apparatus of claim 24, wherein the data concerning call processing activities are collected at the mobile station and the base station.

31. The apparatus of claim 24, wherein the processor collects data concerning call processing activities for testing traffic channel operation of the radio.

32. The apparatus of claim 31, wherein the traffic channel tested is an uplink channel.

33. The apparatus of claim 31, wherein the traffic channel tested is a downlink channel.

34. The apparatus of claim 24, wherein the processor collects data concerning call processing activities for testing overhead channel operation of the radio.

35. The apparatus of claim 34, wherein the overhead channel tested is a pilot channel.

36. A method for testing downlink traffic channel operation of a radio in a base station of a wireless communication network, comprising the steps of:

(A) detecting a wireless communication in progress between the radio and a mobile station in the network;

(B) transmitting a first message signal from the base station to the mobile station during the course of the detected wireless communication directing the mobile station to collect selected data concerning call processing activities associated with downlink transmission from the radio;

(C) transmitting a second message signal from the base station to the mobile station directing the mobile station to transmit to the base station a third message signal containing data representative of the collected call processing activities data, if the detected wireless communication is still in progress a preset interval after detection;

(D) computing a frame error rate for transmission on the downlink channel using the call processing activities data included in the third message signal;

(E) performing steps (A), (B), (C) and (D) for a predetermined number of iterations for testing the downlink traffic channel operation of the radio using a non-utilized mobile station of the network for each iteration, if the computation performed in step (D) for the first time that step (D) is performed and each subsequent time that step (D) is performed results in the computation of an error rate value which exceeds a threshold error rate value; and

,

(F) indicating a failure condition on the downlink traffic channel if the predetermined number of iterations have been performed and the final computation of an error rate value for the downlink traffic channel transmission number exceeds the threshold error rate value.

37. The method of claim 36, wherein the step (A) further comprises the step of transmitting a fourth message to a mobile switching center of the network directing that a wireless communication be completed using the radio.

38. An apparatus for testing downlink traffic channel operation of a radio in a base station of a wireless communication network, comprising:

a detector for detecting a wireless communication in progress between the radio and a mobile station in the network;

a memory for storing data concerning selected call processing activities associated with wireless communications which may be collected at the mobile station during the course of a wireless communication between the radio and the mobile station;

a processor for computing a frame error rate for transmission on the downlink channel of the radio using the call processing activities data stored in the memory, wherein the processor directs the detector to detect a wireless communication over the downlink traffic channel to a non-utilized mobile station in the network for a predetermined number of iterations if the first time that the computation is performed and each subsequent time that the computation is performed results in the computation of an error rate value which exceeds a threshold error rate value; and

,

an indicator for indicating that downlink traffic channel operation of the radio is not properly functioning if the predetermined number of iterations have been performed and the final computed error rate value exceeds the threshold error rate value.

39. A method for testing uplink traffic channel operation of a radio in a base station of a wireless communication network, comprising the steps of:

(A) detecting a wireless communication in progress between the radio and a mobile station in the network;

(B) retrieving call processing activities data stored at the base station concerning transmission on the uplink traffic channel of the radio, if the detected wireless communication is still in progress after a preset interval since detection in step (A);

(C) computing a frame error rate for transmission on the uplink channel using the call processing activities data retrieved in step (B);

(D) performing steps (A), (B), and (C) for a predetermined number of iterations for testing the uplink traffic channel operation of the radio using a non-utilized mobile station of the network for each iteration, if the computation performed in step (C) for the first time that step (C) is performed and for each subsequent time that step (C) is performed results in the computation of an error rate value which exceeds a threshold error rate value; and

,

(E) indicating that a failure condition exists on the uplink traffic channel if the predetermined number of iterations have been performed and the computation of an error rate value for the uplink traffic channel transmission exceeds the threshold error rate value.

40. The method of claim 39, wherein the step (A) further comprises the step of transmitting a fourth message to a mobile switching center of the network directing that a wireless communication be completed using the radio.

41. An apparatus for testing uplink traffic channel operation of a radio in a base station of a wireless communication network, comprising:

a detector for detecting a wireless communication in progress between the radio and a mobile station in the network;

a memory for storing data concerning selected call processing activities associated with wireless communications which may be collected at the base station during the course of a wireless communication between the radio and the mobile station;

a processor for computing a frame error rate for transmission on the uplink channel of the radio using the call processing activities data stored in the memory wherein the processor directs the detector to detect a wireless communication over the uplink traffic channel to a non-utilized mobile station in the network for a predetermined number of iterations if the first time that the computation is performed and each subsequent time that the computation is performed results in the computation of an error rate value which exceeds a threshold error rate value; and

,

an indicator for indicating that uplink traffic channel operation of the radio is not properly functioning if the predetermined number of iterations have been performed and the final computation error rate value exceeds the user set threshold error rate value.

42. A method for testing paging overhead channel operation of a radio in a base station of a wireless communication network, comprising the steps of:

(A) maintaining a time indexed record of each page message signal transmission by the radio to a destination mobile station;

(B) detecting whether a response is received from the destination mobile station;

(C) maintaining records of which mobile stations in the network were the destination mobile stations for page message signals transmissions and which mobile stations responded to page message signal transmissions;

(D) deleting the record corresponding to the circumstance where the destination mobile station did not respond to the page message signal transmission and that mobile station is the same as another mobile station that did not respond to an earlier page message signal transmission; and

,

(E) computing from the records when a preset number of records of page message signal transmissions are stored whether the number of page message signals not responded to exceeds a preset percentage of the total number of page message signals transmitted by the radio.

43. An apparatus for testing paging overhead channel operation of a radio in a base station of a wireless communication network, comprising:

a memory for maintaining a time indexed record of each page message signal transmission by the radio to a destination mobile station;

a detector for detecting whether a response is received from the destination mobile station; and

,

a processor for storing in the memory records of which mobile stations in the network were the destination mobile stations for page message signals transmissions and which mobile stations responded to page message signal transmissions in the memory, wherein the processor deletes the record from the memory corresponding to the circumstance where the destination mobile station did not respond to the page message signal transmission and that mobile station is the same as another mobile station that did not respond to an earlier page message signal transmission, and wherein the processor computes from the records when a preset number of records of page message signal transmissions are stored whether the number of page message signals not responded to exceeds a preset percentage of the total number of page message signals transmitted by the radio.

44. A method for testing a radio of a sector in a base station of a wireless communication network which operates over an overhead channel, comprising the steps of:

detecting a wireless communication in progress between the sector and a mobile station in the network;

collecting data concerning selected call processing activities during the course of the wireless communication between the sector and the mobile station;

processing the collected data values; and

,

comparing the processed data values to expected values for purposes of determining whether the radio is operating properly.

45. The method of claim 44, where the call processing activities data are collected for testing the operation of a paging channel of the radio.

46. An apparatus for testing a radio of a sector in a base station of a wireless communication network which operates over an overhead channel, wherein the network comprises a plurality of mobile stations, the apparatus comprising:

a detector for detecting a wireless communication in progress between the sector and the mobile station in the network,

a memory for storing data concerning selected call processing activities which are collected during the course of a wireless communication between the sector and the mobile station;

a processor for processing the collected data values stored in the memory and comparing the processed data to expected values in order to determine whether the radio is operating properly; and

,

an indicator for indicating the operating condition of the radio.

47. The apparatus of claim 46, wherein the overhead channel tested is a paging channel.

48. A method for testing pilot overhead channel operation of pilot signal radios in a plurality of base stations, respectively, of a wireless communication network, wherein the network comprises a plurality of mobile stations, the method comprising the steps of:

providing a first message signal to each base station when a pilot test schedule indicates that data collection should be performed for a collection interval, wherein the first message signal directs a first radio in a sector, the sector including a pilot signal radio and a second radio engaging in a traffic channel wireless communication with a mobile station, to transmit a second message signal to the mobile station, wherein the first message signal further directs each base station to collect data concerning mobile accesses received from mobile stations, wherein the second message signal directs the mobile station to collect data concerning the identity of all pilot signals that the mobile station can detect and transmit the collected data in the form of a third message signal to a third radio in the radio group,

storing in a memory in each base station data concerning mobile accesses received during the collection interval and the data received as part of the third message signals;

transmitting to a mobile switching center fourth message signals comprising data representative of the data stored in each base station for the collection interval;

determining from the data collected for the collection interval whether a pilot signal radio is potentially failing;

determining whether data was collected and stored in the memory for a collection interval that corresponds, in time, to a previous collection interval;

calculating the probability that a potentially failing pilot signal is indeed failing using data collected for the past collection interval; and

,

providing an indication whether a failure exists.

49. The method of claim 48, further comprising the step of:

revising the test schedule if insufficient data are being collected.