Methods and apparatus for acknowledging a paging message via a cellular network control channel

• US 5,526,401 A
• Filed: 10/31/1994
• Issued: 06/11/1996
• Est. Priority Date: 03/11/1994
• Status: Expired due to Term

• Current Assignee: Numerex Corporation (Sierra Wireless Incorporated)
• Original Assignee: BellSouth Corporation (AT&T, Inc.)
• Inventors: Roach, Peter O. Jr., Laster, Maurice S., Link, Charles M. II, Comer, Edward I.
• Primary Examiner(s): Kuntz, Crtis
• Assistant Examiner(s): TROST IV, WILLIAM GEORGE
• Application Number:
  US08/331,794
• Time in Patent Office: 589 Days
• Field of Search: 379/57, 379/58, 379/59, 379/63, 455/33.1, 455/54.1, 340/825.44, 340/311.11
• US Class Current: 455/426.1
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements
• CPC Class Codes: H04W 84/022 One-way selective calling networks, e.g. wide area paging

Abstract

A paging acknowledgement system is provided for communicating both (1) paging messages and (2) acknowledgement messages to confirm reception of the paging messages. The paging acknowledgement system includes at least one communications system, remote communications devices, and at least one MSC of a CMR system. In response to a paging message from a paging party, the communications system transmits data messages corresponding to the paging message via a communications link. The data message contains the type of data that is normally supplied with a conventional paging message and an acknowledgment code that uniquely identifies said data message. A remote communications device responds to a data message containing its particular address by transmitting an acknowledgment message containing the acknowledgment code to the MSC via a cellular network control channel of the CMR system. The MSC forwards the acknowledgment message to the communications system via a first communications link. The data collection system confirms reception of the data message by comparing the acknowledgment code of the acknowledgment message to the acknowledgment codes associated with the paging messages.

Claims

1. In or for a cellular mobile radiotelephone system (CMR) for communicating with cellular radiotelephones, a paging acknowledgment system for communicating paging messages and acknowledgments to confirm reception of said paging messages, said paging acknowledgment system comprising:

communication means, responsive to said paging messages, for preparing data messages corresponding to said paging messages and transmitting said data messages via a radiopaging communications path;

a plurality of remote communications devices for receiving said data messages via said radiopaging communications path, each of said data messages containing an address that uniquely identifies one of said remote communications devices, each of said remote communications device responsive to a selected one of said data messages containing its associated address for transmitting via a cellular network control channel of said CMR system an acknowledgment message that confirms reception of said selected data message, said acknowledgment message formatted as an identification signal transmitted by one of said cellular radiotelephones when said cellular radiotelephone identifies itself to said CMR system; and

at least one mobile switching center (MSC) for receiving said acknowledgment message via said cellular network control channel from each of said remote communications devices,

said communications means further operative to receive said acknowledgment message from said MSC via a first communications link and to process said acknowledgment message to determine whether said acknowledgment message corresponds to a particular one of said data messages.

2. The apparatus of claim 1, wherein said communications means, responsive to a determination that said acknowledgment message corresponds to said particular data message, outputs a confirmation message to a paging party who initiated one of said paging messages corresponding to said particular data message, said confirmation message supplying verification of reception of said selected data message by said remote communications device.

3. The apparatus of claim 2, wherein said communications means, responsive to a decision that said acknowledgment message corresponds to said particular data message, outputs a confirmation message for storage by a memory storage device connected to said communications system, said stored confirmation message supplying verification of reception of said selected data message.

4. The apparatus of claim 3, wherein said memory storage device is accessible by a paging party who initiated one of said paging messages corresponding to said particular data message to enable said paging party to read said stored confirmation message.

5. The apparatus of claim 1, wherein each of said data messages corresponds to one of said paging messages and comprises said address that uniquely identifies a selected one of said remote communications devices, an acknowledgment code that uniquely identifies said corresponding paging message, and paging data supplied by a paging party who initiated said corresponding paging message and intended for communication to a user associated with said selected remote communications device.

6. The apparatus of claim 5, wherein said acknowledgment message comprises said acknowledgment code.

7. The apparatus of claim 6, wherein said acknowledgment message further comprises operation data supplied by said user and intended for communication to said paging party.

8. The apparatus of claim 5, wherein said acknowledgment message comprises said acknowledgment code and operation data supplied by said user and intended for communication to said paging party.

9. The apparatus of claim 8, wherein said identification signal comprises data fields for a mobile telephone number and an electronic serial number (ESN), said acknowledgment code corresponding to at least a portion of said mobile telephone number and said operation data corresponding to at least a portion of said ESN.

10. The apparatus of claim 9, wherein communications means is further operative to assign said acknowledgment code to each of said data messages and to output said acknowledgment code to a memory storage device for storage as a stored acknowledgment code.

11. The apparatus of claim 10, wherein said communications means determines whether said acknowledgment message corresponds to said particular data message by comparing said acknowledgment code contained in said acknowledgment message to said stored acknowledgment code associated with said particular data message.

12. The apparatus of claim 1, wherein each of said remote communications devices monitors said cellular network control channel to detect a stream of busy idle bits for a predetermined time period, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval, and determines the level of communications for said cellular network control channel based upon the status of said busy idle bits.

13. The apparatus of claim 12, wherein each of said remote communications devices transmits said acknowledgment message to said MSC when said level for said communications is below a certain minimum threshold.

14. The apparatus of claim 1, wherein each of said remote communications devices includes a clock that outputs a clock signal upon expiration of a time interval.

15. The apparatus of claim 14, wherein said time interval is different for each of said remote communications devices.

16. The apparatus of claim 15, wherein each of said remote communications devices is responsive to said clock signal to transmit said acknowledgment message to said MSC.

17. The apparatus of claim 14, wherein each of said remote communications devices is responsive to said clock signal to transmit said acknowledgment message to said MSC.

18. The apparatus of claim 1, wherein each of said remote communications devices includes a clock that outputs a clock signal upon expiration of a time interval, said remote communications devices responsive to said clock signal to transmit said acknowledgment message to said MSC via said cellular network control channel.

19. The apparatus of claim 18, wherein each of said remote communications devices monitors said cellular network control channel to detect a stream of busy idle bits for a predetermined time period, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval, and determines the level of communications for said cellular network control channel based upon the status of said busy idle bits.

20. The apparatus of claim 19, wherein each of said remote communications devices, responsive to said clock signal, delays transmitting said acknowledgment message to said MSC until said level for said communications is below a certain minimum threshold.

21. The apparatus of claim 1, wherein said acknowledgment message is formatted to represent an extended protocol message in accordance with EIA/FIA-553.

22. The apparatus of claim 1, wherein each of said remote communications devices monitors said cellular network control channel to detect a stream of busy idle bits for a predetermined time period, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval, and calculates a running average of said busy idle bits for said predetermined time period and an average of last "n" counts of said busy idle bits for said predetermined time period.

23. The apparatus of claim 22, wherein each of said remote communications devices transmits said acknowledgment message to said MSC when said average of last "n" counts of said busy idle bits is less than stored running average of said busy idle bits.

52. The apparatus of claim 15, wherein said acknowledgment message further comprises operation data supplied by said user and intended for communication to said paging party.

67. The apparatus of claim 22 wherein each of said remote communications devices monitors said cellular network control channel to detect a stream of busy idle bits for a predetermined time period, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval, and calculates and stores a running average of said busy idle bits for said predetermined time period and an average of last "n" counts of busy idle bits for said predetermined time period,

each of said remote communications devices operative to transmit said acknowledgment message to said MSC when said stored average of last "n" counts is less than said stored running average of said busy idle bits.

24. In or for a cellular mobile radiotelephone system (CMR) for communicating with cellular radiotelephones, a paging acknowledgment system for communicating paging messages and acknowledgments to confirm reception of said paging messages, said paging acknowledgment system comprising:

at least one paging terminal, responsive to said paging messages, for preparing data messages corresponding to said paging messages and transmitting said data messages via a radiopaging communications path;

a plurality of remote communications devices for receiving said data messages via said radiopaging communications path, each of said data messages containing an address that uniquely identifies one of said remote communications devices, each of said remote communications device responsive to a selected one of said data messages containing its associated address for transmitting via a cellular network control channel of said CMR system an acknowledgment message that confirms reception of said selected data message, said acknowledgment message formatted as an identification signal transmitted by one of said cellular radiotelephones when said cellular radiotelephone identifies itself to said CMR system;

at least one mobile switching center (MSC) for receiving said acknowledgment message via said cellular network control channel from each of said remote communications devices; and

a data collection system for receiving said acknowledgment message from said MSC via a first communications link, said data collection operative to forward said acknowledgment message to said paging terminal,

wherein said paging terminal is further operative to process said acknowledgment message and to determine whether said acknowledgment message corresponds to a particular one of said data messages.

25. The apparatus of claim 24, wherein said paging terminal, responsive to a determination that said acknowledgment message corresponds to said particular data message, outputs a confirmation message to a paging party who initiated one of said paging messages corresponding to said particular data message, said confirmation message supplying verification of reception of said selected data message by said remote communications device.

26. The apparatus of claim 25, wherein said paging terminal, responsive to a decision that said acknowledgment message corresponds to said particular data message, outputs a confirmation message for storage by a memory storage device connected to said paging terminal, said stored confirmation message supplying verification of reception of said selected data message.

27. The apparatus of claim 26, wherein said memory storage device is accessible by a paging party who initiated one of said paging messages corresponding to said particular data message to enable said paging party to read said stored confirmation message.

28. The apparatus of claim 24, wherein each of said data messages corresponds to one of said paging messages and comprises said address that uniquely identifies a selected one of said remote communications devices, an acknowledgment code that uniquely identifies said corresponding paging message, and paging data supplied by a paging party who initiated said corresponding paging message and intended for communication to a user associated with said selected remote communications device.

29. The apparatus of claim 28, wherein said acknowledgment message comprises said acknowledgment code.

30. The apparatus of claim 29, wherein said acknowledgment message further comprises operation data supplied by said user and intended for communication to said paging party.

31. The apparatus of claim 28, wherein said acknowledgment message comprises said acknowledgment code and operation data supplied by said user and intended for communication to said paging party.

32. The apparatus of claim 31, wherein said identification signal comprises data fields for a mobile telephone number and an electronic serial number (ESN), said acknowledgment code corresponding to at least a portion of said mobile telephone number and said operation data corresponding to at least a portion of said ESN.

33. The apparatus of claim 32, wherein said paging terminal is further operative to assign said acknowledgment code to each of said data messages and to output said acknowledgment code to a memory storage device for storage as a stored acknowledgment code.

34. The apparatus of claim 33, wherein said paging terminal determines whether said acknowledgment message corresponds to said particular data message by comparing said acknowledgment code contained in said acknowledgment message to said stored acknowledgment code associated with said particular data message.

35. The apparatus of claim 24, wherein each of said remote communications devices monitors said cellular network control channel to detect a stream of busy idle bits for a predetermined time period, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval, and determines the level of communications for said cellular network control channel based upon the status of said busy idle bits.

36. The apparatus of claim 35, wherein each of said remote communications devices transmits said acknowledgment message to said MSC when said level for said communications is below a certain minimum threshold.

37. The apparatus of claim 24, wherein each of said remote communications devices includes a clock that outputs a clock signal upon expiration of a time interval.

38. The apparatus of claim 37, wherein said time interval is different for each of said remote communications devices.

39. The apparatus of claim 38, wherein each of said remote communications devices is responsive to said clock signal to transmit said acknowledgment message to said MSC.

40. The apparatus of claim 37, wherein each of said remote communications devices is responsive to said clock signal to transmit said acknowledgment message to said MSC.

41. The apparatus of claim 24, wherein each of said remote communications devices includes a clock that outputs a clock signal upon expiration of a time interval, said remote communications devices responsive to said clock signal to transmit said acknowledgment message to said MSC via said cellular network control channel.

42. The apparatus of claim 41, wherein each of said remote communications devices monitors said cellular network control channel to detect a stream of busy idle bits for a predetermined time period, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval, and determines the level of communications for said cellular network control channel based upon the status of said busy idle bits.

43. The apparatus of claim 42, wherein each of said remote communications devices, responsive to said clock signal, delays transmitting said acknowledgment message to said MSC until said level for said communications is below a certain minimum threshold.

44. The apparatus of claim 24, wherein said acknowledgment message is formatted to represent an extended protocol message in accordance with EIA/TIA-553.

45. The apparatus of claim 24, wherein each of said remote communications devices monitors said cellular network control channel to detect a stream of busy idle bits for a predetermined time period, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval, and calculates and stores a running average of said busy idle bits for said predetermined time period and an average of last "n" counts of busy idle bits for said predetermined time period,

each of said remote communications devices operative to transmit said acknowledgment message to said MSC when said stored average of last "n" counts of said busy idle bits is less than said stored running average of said busy idle bits.

46. In or for a cellular mobile radiotelephone system (CMR) for communicating with cellular radiotelephones, a paging acknowledgment system for communicating paging messages and acknowledgments to confirm reception of said paging messages, said paging acknowledgment system comprising:

a data collection system, responsive to said paging messages, for preparing and transmitting data messages corresponding to said paging messages;

at least one radiopaging terminal, responsive to said data messages, for transmitting said data messages via a radiopaging communications path;

a plurality of remote communications devices for receiving said data messages via said radiopaging communications path, each of said data messages containing an address that uniquely identifies one of said remote communications devices, each of said remote communications device responsive to a selected one of said data messages containing its associated address for transmitting via a cellular network control channel of said CMR system an acknowledgement message that confirms reception of said selected data message, said acknowledgement message formatted as an identification signal transmitted by one of the cellular radiotelephones when said cellular radiotelephone identifies itself to said CMR system; and

at least one mobile switching center (MSC) for receiving said acknowledgement message via said cellular network control channel from each of said remote communications devices, said MSC operative to transmit said acknowledgement message via a first communications link to said data collection system,

wherein said data collection system, responsive to receiving said acknowledgement message from said MSC via said first communications link, processes said acknowledgement message to determine whether said acknowledgement message corresponds to a particular one of said data messages.

47. The apparatus of claim 46, wherein said data collection system, responsive to a determination that said acknowledgment message corresponds to said particular data message, outputs a confirmation message to a paging party who initiated one of said paging messages corresponding to said particular data message, said confirmation message supplying verification of reception of said selected data message.

48. The apparatus of claim 47, wherein said data collection system, responsive to a decision that said acknowledgment message corresponds to said particular data message, outputs a confirmation message for storage by a memory storage device connected to said paging terminal, said stored confirmation message supplying verification of reception of said selected data message.

49. The apparatus of claim 48, wherein said memory storage device is accessible by a paging party who initiated one of said paging messages corresponding to said particular data message to enable said paging party to read said stored confirmation message.

50. The apparatus of claim 46, wherein each of said data messages corresponds to one of said paging messages and comprises said address that uniquely identifies a selected one of said remote communications devices, an acknowledgment code that uniquely identifies said corresponding paging message, and paging data supplied by a paging party who initiated said corresponding paging message and intended for communication to a user associated with said selected remote communications device.

51. The apparatus of claim 50, wherein said acknowledgment message comprises said acknowledgment code.

53. The apparatus of claim 50, wherein said acknowledgment message comprises said acknowledgment code and operation data supplied by said user and intended for communication to said paging party.

54. The apparatus of claim 53, wherein said identification signal comprises a mobile telephone number and an electronic serial number (ESN), said acknowledgment code corresponding to at least a portion of said mobile telephone number and said operation data corresponding to at least a portion of said ESN.

55. The apparatus of claim 54, wherein said data collection system is further operative to assign said acknowledgment code to each of said data messages and to output said acknowledgment code to a memory storage device for storage as a stored acknowledgment code.

57. The apparatus of claim 46, wherein each of said remote communications devices monitors said cellular network control channel to detect a stream of busy idle bits for a predetermined time period, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval, and determines the level of communications for said cellular network control channel based upon the status of said busy idle bits.

58. The apparatus of claim 57, wherein each of said remote communications devices transmits said data message to said MSC when said level for said communications is below a certain minimum threshold.

59. The apparatus of claim 46, wherein each of said remote communications devices includes a clock that outputs a clock signal upon expiration of a time interval.

60. The apparatus of claim 59, wherein said time interval is different for each of said remote communications devices.

61. The apparatus of claim 60, wherein each of said remote communications devices is responsive to said clock signal to transmit said acknowledgment message to said MSC.

62. The apparatus of claim 59, wherein each of said remote communications devices is responsive to said clock signal to transmit said acknowledgment message to said MSC.

63. The apparatus of claim 46, wherein each of said remote communications devices includes a clock that outputs a clock signal upon expiration of a time interval, said remote communications devices responsive to said clock signal to transmit said acknowledgment message to said MSC via said cellular network control channel.

64. The apparatus of claim 63, wherein each of said remote communications devices monitors said cellular network control channel to detect a stream of busy idle bits for a predetermined time period, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval, and determines the level of communications for said cellular network control channel based upon the status of said busy idle bits.

65. The apparatus of claim 64, wherein each of said remote communications devices, responsive to said clock signal, delays transmitting said acknowledgment message to said MSC until said level for said communications is below a certain minimum threshold.

66. The apparatus of claim 46, wherein said acknowledgment message is formatted to represent an extended protocol message in accordance with EIA/TIA-553.

56. The apparatus of claim 56, wherein said data collection system determines whether said particular data message corresponds to said acknowledgment message by comparing said acknowledgment code contained in said acknowledgment message to said stored acknowledgment code.

68. In or for a cellular mobile radiotelephone (CMR) system for communicating with celluar radiotelephones, a method for acknowledging reception of paging messages, each of said paging messages generated by a paging party for communication to a paged party, said method comprising the steps of:

receiving one of said paging messages from said paging party;

preparing a data message in response to receiving a particular one of said paging messages, said data message corresponding to said particular paging message;

transmitting said data message via a radiopaging communications path;

preparing an acknowledgment message, in response to receiving said data message via said radiopaging communications path, to confirm reception of said data message, said acknowledgment message formatted as an identification signal transmitted by one of said cellular radiotelephones when said cellular radiotelephone identifies itself to said CMR system;

transmitting said acknowledgment message via a control channel of said CMR system to at least one mobile switching center (MSC); and

processing said acknowledgment message to determine whether said acknowledgment message corresponds to said data message.

69. The method of claim 68 further comprising the step of outputting a confirmation message in response to determining said acknowledgment message corresponds to said data message, said confirmation message supplying verification of reception of said data message.

70. The method of claim 68, wherein said data message comprises an address that uniquely identifies a selected remote communications unit for receiving said data message, an acknowledgment code that uniquely identifies said corresponding paging message, and paging data supplied by a paging party who initiated said corresponding paging message and intended for communication to said paged party.

71. The method of claim 70, wherein said acknowledgment message comprises said acknowledgment code.

72. The method of claim 71, wherein said acknowledgment message further comprises operation data supplied by said paged party and intended for communication to said paging party.

73. The method of claim 70, wherein said acknowledgment message comprises said acknowledgment code and said operation data supplied by said another party and intended for communication to said paging party.

74. The method of claim 73, wherein said identification signal comprises data fields for a mobile telephone number and an electronic serial number (ESN), said acknowledgment code corresponding to at least a portion of said mobile telephone number and said operation data corresponding to at least a portion of said modified ESN.

75. The method of claim 68, wherein said step transmitting said acknowledgment message comprises:

monitoring said cellular network control channel for a predetermined time period to detect a stream of busy idle bits, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval;

calculating the level of communications for said control network control channel based upon the status of said busy idle bits; and

delaying said step of transmitting said data message to said MSC until said level for said predetermined time period is below a certain minimum threshold.

76. The method of claim 68, wherein said step of transmitting said acknowledgment message comprises:

outputting a clock signal upon expiration of a time interval; and

transmitting said acknowledgment message in response to said clock signal.

77. The method of claim 76 further comprising the steps of:

monitoring said cellular network control channel for a predetermined time period to detect a stream of busy idle bits, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval;

determining the level of communications for said control network control channel based upon the status of said busy idle bits; and

delaying said step of transmitting said acknowledgment message to said MSC until said level for said communications is below a certain minimum threshold.

78. The method of claim 68, wherein said step of transmitting said acknowledgment message comprises:

monitoring said cellular network control channel for a predetermined time period to detect a stream of busy idle bits, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval;

calculating a running average of said busy idle bits for said predetermined time period and an average of last "n" counts of busy idle bits for said predetermined time period; and

delaying transmitting said acknowledgment message to said MSC until said average of last "n" counts of said busy idle bits is less than said running average of said busy idle bits.

79. The method of claim 76 further comprising the steps of:

monitoring said cellular network control channel for a predetermined time period to detect a stream of busy idle bits, each of said busy idle bits indicating whether a cellular source has initiated a cellular communication with said MSC via said cellular network control channel during a particular time interval;

calculating and storing a running average of said busy idle bits for said predetermined time period and an average of last "n" counts of busy idle bits for said predetermined time period; and

delaying said step of transmitting said acknowledgment message to said MSC until said stored average of last "n" counts of said busy idle bits is less than said stored running average of said busy idle bits.