Methods and apparatus for communicating data via a cellular mobile radiotelephone system

• US 5,794,144 A
• Filed: 03/25/1996
• Issued: 08/11/1998
• 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: Comer, Edward Irby, Roach, Peter Owen Jr.
• Primary Examiner(s): Bost, Dwayne D.
• Assistant Examiner(s): GELIN, JEAN ALLAND
• Application Number:
  US08/622,438
• Time in Patent Office: 869 Days
• Field of Search: 455/432, 455/426, 455/410, 455/412, 379/106.1
• US Class Current: 455/426.1
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 68/12 Inter-network notification
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast
• CPC Class Codes: H04W 8/22 Processing or transfer of terminal data, e.g. status or physical capabilities
• CPC Class Codes: H04W 84/022 One-way selective calling networks, e.g. wide area paging
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A system for communicating data via a cellular network control channel of a cellular mobile radiotelephone system (CMR). A data message system includes reporting devices, a mobile switching center (MSC) of a CMR system, and a data collection system. The MSC receives data messages via the cellular network control channel from reporting devices operating within coverage areas of the array of cells and forwards the data messages via a first communications link to the data collection system. A paging acknowledgment system also can communicate both (1) paging messages and (2) acknowledgment messages to confirm reception of the paging messages. The paging acknowledgment system includes a communications system, remote communications devices, and at least one MSC of a CMR system. A remote communications device responds to a data message corresponding to a paging message by transmitting an acknowledgment message containing an acknowledgment code to the MSC via a cellular network control channel of the CMR system. In response, the MSC forwards the acknowledgment message to the communications system.

Claims

1. In or for a cellular mobile radiotelephone (CMR) system having an array of cells for communicating with cellular mobile radiotelephones within coverage areas of said array of cells, a data message system for communicating selected data collected from a plurality of remote data sources, said data message system comprising:

a plurality of data reporting means, each of said data reporting means operative for monitoring a corresponding one of said remote data sources to obtain said selected data and for transmitting a data message containing said selected data;

a mobile switching center (MSC) for receiving said data message via a cellular network control channel from each of said data reporting means operating within said coverage areas of said array of cells; and

data collection means for collecting said selected data in response to receiving said data message from said MSC via a first communications link, said data message formatted as a call origination signal transmitted by one of the cellular mobile radiotelephones when said cellular mobile radiotelephone originates a cellular telephone call for communication via said CMR system.

2. The apparatus of claim 1, wherein said data collection means is operative to transmit said data message to a data processing system via a second communications link, said data processing system being operative to process said selected data of said data message.

3. The apparatus of claim 1, wherein said data message comprises said selected data and a predetermined identifying characteristic which uniquely identifies a certain one of said data reporting means that transmits said data message to said MSC.

4. The apparatus of claim 3, wherein said call origination signal comprises data fields for a mobile telephone number and an electronic serial number (ESN), said predetermined identifying characteristic corresponding to at least a portion of said mobile telephone number and said selected data corresponding to at least a portion of said ESN.

5. The apparatus of claim 1, wherein said data reporting means generates a status signal representing the occurrence of an event in the environment of said corresponding remote data source, said data reporting means responsive to said status signal to transmit said data message to said MSC.

6. The apparatus of claim 1, wherein said data reporting means 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, determines the level of communications for said cellular network control channel based upon the status of said busy idle bits, and transmits said data message to said MSC when said level for said communications is below a certain minimum threshold.

7. The apparatus of claim 1, wherein said data reporting means conducts predetermined operations in response to receiving command signals from said MSC via said cellular network control channel.

8. The apparatus of claim 7, wherein a selected one of said data reporting means transmits said data message to said MSC via said cellular network control channel in response to receiving one of said command signals via said cellular network control channel.

9. The apparatus of claim 7, wherein a selected one of said data reporting means monitors said corresponding remote data source and obtains said selected data for a certain monitoring time period in response to receiving one of said command signals via said cellular network control channel.

10. The apparatus of claim 1, wherein said data reporting means includes a clock that outputs a clock signal upon expiration of a time interval, said data reporting means operative to transmit a certain data message containing said stored selected data to said MSC via said cellular network control channel in response to said clock signal.

11. In or for a cellular mobile radiotelephone system (CMR) having an array of cells for communicating with cellular mobile radiotelephones within coverage areas of said array of cells, a paging acknowledgment system for communicating paging messages and acknowledgments to confirm reception of said paging messages, said paging acknowledgment system comprising;

a communications system, 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 to correspond to a call origination signal transmitted by one of the cellular mobile radiotelephones when said cellular mobile radiotelephone originates a cellular telephone call for communication via 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

said communications system 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.

12. The apparatus of claim 11, wherein said communications 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 by said remote communications device.

13. The apparatus of claim 12, 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, and said acknowledgment message comprises said acknowledgment code and operation data supplied by said user and intended for communication to said paging party.

14. The apparatus of claim 13, wherein said call origination 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.

15. The apparatus of claim 13, wherein communications 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.

16. The apparatus of claim 15, wherein said communications system 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.

17. The apparatus of claim 11, 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, determines the level of communications for said cellular network control channel based upon the status of said busy idle bits, and transmits said acknowledgment message to said MSC when said level for said communications is below a certain minimum threshold.

18. The apparatus of claim 11, wherein said remote communications devices include 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.

19. In or for a cellular mobile radiotelephone (CMR) system for communicating with cellular mobile radiotelephones within coverage areas of said array of cells, a method for communicating data collected from a plurality of remote data sources, comprising the steps of:

monitoring the operation of each of said remote data sources to obtain selected data;

transmitting a data message containing said selected data via a cellular network control channel to a mobile switching center (MSC) of said CMR system, said data message formatted to correspond to a call origination signal transmitted by one of the cellular mobile radiotelephones when said cellular mobile radiotelephone originates a cellular telephone call to communicate via said CMR system; and

transmitting said data message from said MSC to a data collection system via a first communications link, said data collection system operative to collect said selected data in response to said data message.

20. The method of claim 19 further comprising the step of transmitting said data message from said data collection system to a data processing system via a second communications link, said data processing system being operative to process said selected data of said data message.

21. The method of claim 19, wherein said data message comprises said selected data and a predetermined identifying characteristic that uniquely identifies a cellular communications device that transmits said data message to said MSC.

22. The method of claim 21, wherein said call origination signal comprises a mobile telephone number and an electronic serial number (ESN), said predetermined identifying characteristic corresponding to at least a portion of said mobile telephone number.

23. The method of claim 19, wherein said monitoring step comprises:

monitoring said selected data for one of said remote data sources; and

recording said selected data during at least one predetermined time period.

24. The method of claim 23, wherein said monitoring step further comprises adding to said selected data a time tag indicating the relative time for the start of each of said predetermined time period.

25. The method of claim 19, 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 the level of communications for said cellular 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 of said communications is below a certain minimum threshold.

26. The method of claim 19, further comprising the step of conducting predetermined operations in response to receiving command signals from said MSC via said cellular network control channel.

27. The method of claim 26 further comprising the step of transmitting said data message to said MSC via said cellular network control channel in response to receiving one of said command signals.

28. The method of claim 26 further comprising the steps of:

outputting an instruction signal in response to receiving one of said command signals from said MSC via said cellular network control channel; and

monitoring said remote data source in response to said instruction signal to obtain said selected data for a certain monitoring time period.

29. The method of claim 19 wherein said step of transmitting said data message to said MSC comprises:

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

transmitting one of said data messages to said MSC via said cellular network control channel in response to said clock signal.

30. The method of claim 29 further comprising the step of synchronizing said time interval of said clock signal to a certain time in response to receiving another one of said command signals from said MSC via said cellular network control channel.

31. In or for a cellular mobile radiotelephone (CMR) system for communicating with cellular mobile radiotelephones within coverage areas of said array of cells, a method for communicating acknowledgment messages to confirm 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 a particular one of said paging messages from said paging party;

preparing a data message in response to receiving said particular paging message, 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 to correspond to a call origination signal transmitted by a cellular mobile radiotelephone when said cellular mobile radiotelephone originates a cellular telephone call to communicate via said CMR system;

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

processing said acknowledgment message to determine whether one of said acknowledgment messages corresponds to said data message.

32. The method of claim 31 further comprising the step of outputting a confirmation message in response to determining that said acknowledgment message corresponds to said data message, said confirmation message supplying verification of reception of said data message.

33. The method of claim 32, 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.

34. The method of claim 33, wherein said acknowledgment message comprises said acknowledgment code and operation data supplied by said paged party and intended for communication to said paging party.

35. The method of claim 34, wherein said call origination 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 modified ESN.

36. The method of claim 31, 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 cellular 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 predetermined time period is below a certain minimum threshold.

37. The method of claim 31, 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.