Paging transmission system

• US 5,452,356 A
• Filed: 12/10/1993
• Issued: 09/19/1995
• Est. Priority Date: 02/10/1993
• Status: Expired due to Fees

• Current Assignee: GE Medical Systems Information Technologies Incorporated (General Electric Company)
• Original Assignee: Data Critical Corporation (General Electric Company)
• Inventors: Albert, David E.
• Primary Examiner(s): Gregory, Bernarr E.
• Application Number:
  US08/165,743
• Time in Patent Office: 648 Days
• Field of Search: 375/1, 380/3, 380/4, 380/9, 380/18, 380/23, 380/25, 380/34, 380/49, 380/50, 380/29, 128/668, 128/672, 128/696, 128/716, 128/731, 128/736, 379/58, 379/59, 379/100, 379/106, 455/33.1, 455/53.1, 455/54.1, 455/38.1, 340/825.44, 340/825.52
• US Class Current: 380/271
• CPC Class Codes: G08B 5/226 with alphanumeric or graphic display means
• CPC Class Codes: H04W 88/023 with message or information receiving capability

Abstract

Method and apparatus for sending, receiving, and displaying custom coded textual and/or graphic data via an alphanumeric paging system wherein source data in binary form is encrypted with a designated code and then further converted to an alphanumeric code for transmission via the paging system; a paging receiver with storage capability used in combination with a computer then receives the transmitted data and downloads the alphanumeric code data for reconversion and decryption to binary data and subsequent display of the text and/or graphic data.

Claims

1. A method for transmitting selected data that is encrypted with a custom code from a source position to a remote position, comprising:

generating said selected data as digital binary data at the source;

encrypting said binary data in accordance with the custom code;

converting the custom code encrypted data to alphanumeric code data and dividing into at least one successive sub-files, each of preselected maximum message size;

transmitting the divided, encrypted alphanumeric code data via a paging switch;

receiving the encrypted alphanumeric code data via paging receiver at the remote position;

downloading the encrypted alphanumeric code data to a personal computer which recombines the at least one sub-files;

decoding the encrypted alphanumeric code data to encrypted binary data;

decrypting the encrypted binary data to generate binary data; and

displaying said binary data in original selected data form.

2. A method as set forth in claim 1 wherein said step of transmitting comprises:

applying the encrypted alphanumeric code data through a modem to the paging switch to transmit the alphanumeric code data.

3. A method as set forth in claim 1 wherein:

said alphanumeric code data is ASCII code data.

4. A method as set forth in claim 1 wherein the step of downloading further includes:

recombining the encrypted alphanumeric code data sub-files in the personal computer thereby to reconstruct the total encrypted selected data.

5. A method as set forth in claim 4 wherein said step of transmitting comprises:

applying the encrypted alphanumeric code data through a modem to the paging switch to transmit the alphanumeric code data.

6. A method as set forth in claim 1 which further includes the steps of:

compressing the digital binary data prior to the step of encrypting; and

decompressing the binary data after the step of decrypting.

7. A method for transmitting paging data that is encrypted with a selected custom code from a source to a remote position, comprising:

deriving said paging data at the source as binary data;

encrypting the binary data in accordance with the custom code;

encoding the encrypted binary data to ASCII code data;

transmitting the ASCII code data via an alphanumeric paging system;

receiving the ASCII code data at the remote position;

downloading the ASCII code data to a personal computer which decodes to the encrypted binary data; and

decrypting the encrypted binary data for output indication of the paging data.

8. A method as set forth in claim 7 wherein said step of receiving includes:

receiving by means of an alphanumeric paging receiver with internal storage and storing the ASCII code data.

9. A method as set forth in claim 8 which is further characterized to include:

dividing the ASCII code data into plural sub-files, each no larger than the paging switch internal capacity, before transmitting; and

transmitting the respective ASCII code data sub-files in sequential order.

10. A method as set forth in claim 9 which is further characterized to include:

receiving the successive ASCII code data sub-files and downloading each in sequential order to the personal computer; and

decoding the total ASCII code data to provide the paging data output indication.

11. A method as set forth in claim 10 wherein:

said paging data is alphanumeric data.

12. A method as set forth in claim 7 wherein said paging data is alphanumeric data.

13. A method as set forth in claim 7 which further includes the steps of:

compressing the binary data prior to the step of encrypting; and

decompressing the binary data after the step of decrypting.

14. A paging system for transmitting selected data encrypted with a custom code to a remote location, comprising:

means for deriving the selected data in binary signal form;

means for encrypting the binary signal form to custom coded binary signals;

means for translating the custom coded binary signals to ASCII code data;

a paging switch for receiving the ASCII code data and transmitting the data;

a paging receiver for receiving the ASCII code data and storing for subsequent download of data;

means receiving the download data and retranslating the ASCII code data to said custom coded binary signals;

means for decrypting said custom coded binary signals to generate binary signal data; and

means for processing the binary signal data to provide output indication of the selected data.

15. A paging system as set forth in claim 14 wherein said means for translating comprises:

means for converting the custom coded binary signals from binary to ASCII code; and

means for dividing the ASCII code signals into a plurality of sub-files of predetermined file size for sequential input to said paging switch.

16. A paging system as set forth in claim 14 wherein said means receiving comprises:

means for receiving the successively downloaded sub-files of ASCII code data; and

means for retranslating the successive sub-files of ASCII code data to produce the full message custom coded binary signal data.

17. A paging system as set forth in claim 14 wherein said means for deriving comprises:

means for generating a first output indicative of selected data; and

means for producing the first output in binary digital signal form.

18. A paging system as set forth in claim 17 wherein said means for translating comprises:

means for converting the custom coded binary digital signals to ASCII code data; and

means for dividing the ASCII code data into a plurality of sub-files of predetermined file size for sequential input to said paging switch.

19. A paging system as set forth in claim 18 wherein said means receiving comprises:

means for receiving the successively downloaded sub-files of ASCII code data;

means for retranslating the successive sub-files of ASCII code data to produce the full message custom coded binary signal data; and

means providing output indication of the full message binary signal data.

20. A paging system as set forth in claim 14 which further includes:

means for compressing said selected data in binary signal form prior to input to said means for encrypting; and

means for decompressing said binary signal data output from said means for decrypting.