Poor network coverage mapping

• US 6,266,514 B1
• Filed: 11/06/1998
• Issued: 07/24/2001
• Est. Priority Date: 11/06/1998
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: OʼDonnell, Owen
• Primary Examiner(s): Chang, Vivian
• Assistant Examiner(s): Lee, John J.
• Application Number:
  US09/186,886
• Time in Patent Office: 991 Days
• Field of Search: 455/510, 455/522, 455/453, 455/517, 455/67.1, 455/67.3, 455/456, 455/457, 455/423-425, 455/67.7, 455/450, 379/32, 370/252
• US Class Current: 455/67.13
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition

Abstract

A method and system for automatically mapping areas of poor coverage in a cellular network uses signal quality information and mobile station location information. The system constructs a visual map that notes the locations of mobile stations when poor base station-mobile station communication signal quality is reported. The visual map can be used for identifying areas of the network that may require remediation to ensure sufficient network coverage.

Claims

1. A method of constructing a data representation indicating an occurrence of an event associated with a mobile station in a radiocommunications network, comprising the steps of:

providing at least one parameter indicating the occurrence of an event associated with said mobile station;

comparing said at least one parameter with a plurality of threshold values to provide a comparison result;

initiating a positioning request from said network based on said comparison result;

providing a location of said mobile station based on said positioning request, wherein said location is associated with the occurrence of said event; and

constructing a data representation indicating the occurrence of said event using said plurality of threshold values and said location, wherein said data representation is coded with a value associated with at least one threshold value of said plurality of threshold values.

2. The method of claim 1, wherein said coded value represents color.

3. The method of claim 1, wherein said comparison result indicates whether said at least one parameter satisfies a specified relation with at least one of said plurality of threshold values.

4. The method of claim 1, wherein said at least one parameter includes signal quality.

5. The method of claim 4, wherein said signal quality parameter is signal strength.

6. The method of claim 4, wherein said signal quality parameter is bit error rate.

7. The method of claim 4, wherein said signal quality parameter is frame error rate.

8. The method of claim 1, wherein at least one of said parameters is transmitted over a radio communications channel.

9. The method of claim 1, wherein said event is an occurrence of a dropped call from said mobile station.

10. The method of claim 1, wherein said step of comparing is selectively omitted so as to disengage said method of constructing a data representation.

11. The method of claim 1, wherein said plurality of threshold values can be specified differently for different portions of said network.

12. The method of claim 11, wherein said different portions comprise different cells of said network.

13. The method of claim 1, wherein the plurality of threshold values is lower if a cell is a hot spot cell.

14. The method of claim 1, wherein the plurality of threshold values are adjusted based on a radio environment of the cell.

15. A system for constructing a data representation indicating an occurrence of an event associated with a mobile station in a radiocommunications network, comprising:

means for providing at least one parameter indicating the occurrence of an event associated with said mobile station;

means for comparing said at least one parameter with a plurality of threshold values to provide a comparison result;

means for initiating a positioning request from said network based on said comparison result;

means for providing a location of said mobile station based on said positioning request, wherein said location is associated with the occurrence of said event; and

means for constructing a data representation indicating the occurrence of said event using said plurality of threshold values and said location, wherein said data representation is coded with a value associated with at least one threshold value of said plurality of threshold values.

16. The system of claim 15, wherein said coded value represents color.

17. The system of claim 15, wherein said comparison result indicates whether said at least one parameter satisfies a specified relation with at least one of said plurality of threshold values.

18. The system of claim 15, wherein said at least one parameter includes signal quality.

19. The system of claim 18, wherein said signal quality parameter is signal strength.

20. The system of claim 18, wherein said signal quality parameter is bit error rate.

21. The system of claim 18, wherein said signal quality parameter is frame error rate.

22. The system of claim 15, wherein at least one of said parameters is transmitted over a radio communications channel.

23. The system of claim 15, wherein said event is an occurrence of a dropped call from said mobile station.

24. The system of claim 15, wherein said means for comparing is selectively deactivated so as to disengage said means for constructing a data representation.

25. The method of claim 15, wherein said plurality of threshold values can be specified differently for different portions of said network.

26. The method of claim 15, wherein said different portions comprise different cells of said network.

27. The method of claim 15, wherein the plurality of threshold values is lower if a cell is a hot spot cell.

28. The method of claim 15, wherein the plurality of threshold values are adjusted based on a radio environment of the cell.

29. A method of constructing a map of events associated with mobile stations in a radiocommunications network, comprising the steps of:

a) providing at least one parameter indicating the occurrence of an event associated with a mobile station;

b) comparing said at least one parameter with a plurality of threshold values to provide a comparison result;

c) initiating a positioning request from said network based on said comparison result;

d) providing a location of said mobile station based on said positioning request, wherein said location is associated with the occurrence of said event;

e) constructing a data representation indicating the occurrence of said event using said plurality of threshold values and said location, wherein said data representation is coded with a value associated with at least one threshold value of said plurality of threshold values; and

f) selectively repeating steps a) through e) to construct a map of occurrences of said events throughout at least a portion of said network.

30. The method of claim 29, wherein said coded value represents color.

31. The method of claim 29, wherein said comparison result indicates whether said at least one parameter satisfies a specified relation with at least one of said plurality of threshold values.

32. The method of claim 29, wherein said at least one parameter includes signal quality.

33. The method of claim 32, wherein said signal quality parameter is signal strength.

34. The method of claim 32, wherein said signal quality parameter is bit error rate.

35. The method of claim 32, wherein said signal quality parameter is frame error rate.

36. The method of claim 29, wherein at least one of said parameters is transmitted over a radio communications channel.

37. The method of claim 29, wherein said event is an occurrence of a dropped call from said mobile station.

38. The method of claim 29, wherein said step of comparing is selectively omitted so as to disengage said method of constructing a map of events for at least a portion of said network.

39. The method of claim 29, wherein said plurality of threshold values can be specified differently for different portions of said network.

40. The method of claim 29, wherein said different portions comprise different cells of said network.

41. A system for constructing a map of events associated with mobile stations in a radiocommunications network, comprising:

means for providing parameters indicating the occurrences of events associated with a plurality of mobile stations;

means for comparing said parameters with a plurality of threshold values to provide comparison results;

means for initiating positioning requests from said network based on said comparison results;

means for providing locations of each of said plurality of mobile station based on said positioning requests, wherein said locations are associated with said occurrences of events;

means for constructing data representations indicating said occurrences of events using said plurality of threshold values and said locations, wherein said data representations are coded with a value associated with at least one threshold value of said plurality of threshold values; and

means for constructing a map of said occurrences of events throughout at least a portion of said network using said constructed data representations.

42. The system of claim 41, wherein said coded value represents color.

43. The system of claim 41, wherein said comparison results indicate whether said parameters satisfy a specified relation with at least one of said plurality of threshold values.

44. The system of claim 41, wherein said parameters include signal quality.

45. The system of claim 44, wherein said signal quality parameters are signal strength.

46. The system of claim 44, wherein said signal quality parameters are bit error rate.

47. The system of claim 44, wherein said signal quality parameters are frame error rate.

48. The system of claim 41, wherein said parameters are transmitted over radio communication channels.

49. The system of claim 41, wherein said events are occurrences of dropped calls from said plurality of mobile stations.

50. The system of claim 41, wherein said means for comparing is selectively deactivated so as to disengage said means for constructing a map for at least a portion of said network.

51. The method of claim 41, wherein said plurality of threshold values can be specified differently for different portions of said network.

52. The method of claim 51, wherein said different portions comprise different cells of said network.

53. A method of constructing a map of uplink/downlink signal degradation in a radiocommunications network, comprising the steps of:

a) providing at least one parameter indicating signal degradation associated with a location of a mobile station;

b) comparing said at least one parameter with a plurality of threshold values to provide a comparison result;

c) initiating a positioning request from said network based on said comparison result;

d) providing a location of said mobile station based on said positioning request;

e) constructing a data representation indicating said signal degradation using said plurality of threshold values and said location, wherein said data representation is coded with a value associated with at least one threshold value of said plurality of threshold values; and

f) selectively repeating steps a) through e) to construct a map of signal degradation throughout at least a portion of said network.

54. A system for constructing a map of uplink/downlink signal degradation in a radiocommunications network comprising:

means for providing parameters indicating the signal degradation associated with locations of a plurality of mobile stations;

means for comparing said parameters with a plurality of threshold values to provide comparison results;

means for initiating positioning requests from said network based on said comparison results;

means for providing said locations of each of said plurality of mobile stations based on said positioning requests;

means for constructing data representations indicating said signal degradation using said plurality of threshold values and said locations, wherein said data representation is coded with a value associated with at least one threshold value of said plurality of threshold values; and

means for constructing a map of signal degradation throughout at least a portion of said network using said data representations.

55. A method of constructing a data representation indicating an occurrence of an event associated with a mobile station in a radiocommunications network, comprising the steps of:

providing at least one parameter indicating the occurrence of an event associated with said mobile station;

comparing said at least one parameter with a plurality of threshold values to provide a comparison result, wherein said plurality of threshold values are different for different portions of said network;

initiating a positioning request from said network based on said comparison result;

providing a location of said mobile station based on said positioning request, wherein said location is associated with the occurrence of said event; and

constructing a data representation indicating the occurrence of said event using said plurality of threshold values and said location, wherein said data representation is coded with a value associated with at least one threshold value of said plurality of threshold values.

56. A system for constructing a data representation indicating an occurrence of an event associated with a mobile station in a radiocommunications network, comprising:

means for providing at least one parameter indicating the occurrence of an event associated with said mobile station;

means for comparing said at least one parameter with a plurality of threshold values to provide a comparison result, wherein said plurality of threshold values are different for different portions of said network;

means for initiating a positioning request from said network based on said comparison result;

means for providing a location of said mobile station based on said positioning request, wherein said location is associated with the occurrence of said event; and

means for constructing a data representation indicating the occurrence of said event using said plurality of threshold values and said location, wherein said data representation is coded with a value associated with at least one threshold value of said plurality of threshold values.