Apparatus and method for transparent wireless communication between a remote device and a host system

• US 5,717,737 A
• Filed: 06/01/1995
• Issued: 02/10/1998
• Est. Priority Date: 06/01/1995
• Status: Expired due to Term

• Current Assignee: Mobile Sonic Incorporated (Absolute Software Corporation)
• Original Assignee: Padcom Incorporated (NetMotion Software, Inc.)
• Inventors: Doviak, William, Whitmore, David L.
• Primary Examiner(s): Cumming, William
• Assistant Examiner(s): RICHARDSON, SCO
• Application Number:
  US08/456,860
• Time in Patent Office: 985 Days
• Field of Search: 379/58, 379/59, 379/63, 379/60, 370/94.1, 455/33.2, 455/33.4, 455/33.1
• US Class Current: 455/403
• CPC Class Codes: H04L 12/5692 Selection among different networks
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

An apparatus and method is provided for transparent communication between a wireless remote or mobile device and a fixed wired communication host network. The apparatus and method may include a remote network controller that logically resides between the host network and the existing radio infrastructure(s) that are used to provide wireless contact with one or more remote devices. The remote network controller is connected to the host communication network as a protocol-appropriate communications controller so that remote devices are indistinguishable to the host network from the locally-attached devices. Each remote device may be provided with an asynchronous serial data interface to communicate with a mobile data controller. The mobile data controller, in combination with the remote network controller, provides end-to-end data communication such that incompatible protocols are transparent to the remote device and host communication network.

Claims

1. An apparatus for end-to-end data communications where data is transported via incompatible transmission formats between a remote device and a host communication network using a wireless communications link in a manner that is transparent to said remote device, said host communication network, and attendant applications of said host communication network, comprising:

a mobile data controller, said mobile data controller connected to said remote device and interfacing said remote device with said wireless communications link, said mobile data controller comprising remote data conversion means for converting data to be transported between said remote device and said host communication network, said remote data conversion means converting said transported data between a remote device transmission format utilized by said remote device and one of a plurality of digital and analog wireless link transmission formats utilized by said wireless communications link;

network interface means for interfacing said host communication network with said wireless communications link, said network interface means comprising a network protocol-appropriate communication controller logically residing on said host communication network, said network interface means further comprising;

(a) wireless link conversion means for converting said transported data between said one of a plurality of wireless link transmission formats and a network interface format utilized by said network interface means; and

(b) host network conversion means for converting said transported data between said network interface format and a host network format utilized by said host communication network; and

means for transporting said transported data over said wireless communication in accordance with said plurality of wireless link transmission formats,

said remote device transmission format, said wireless link transmission format, said network interface format and said host network format being dissimilar formats.

2. An apparatus for transporting data according to claim 1, wherein said network interface means comprises a remote network controller.

3. An apparatus for transporting data according to claim 2, wherein said remote network controller is adapted to be connectable to a plurality of different types of host communication networks having distinct transmission characteristics.

4. An apparatus for transporting data according to claim 3, wherein said transmission characteristics comprise SNA/SDLC, TCP/IP Stream Socket, Asynchronous Transfer, Hayes Compatible, Bidirectional Messaging Facility, FTP, Global Position Reporting, and Credit Card Verification.

5. An apparatus for transporting data according to claim 1, wherein said mobile data controller is adapted to be connectable to a plurality of different types of remote devices having distinct operational characteristics.

6. An apparatus for transporting data according to claim 5, wherein said plurality of different types of remote devices comprise a portable computer, a portable bar code reader, a portable credit card reader, a printer, and a remote telemetry unit.

7. An apparatus for transporting data according to claim 1, wherein said wireless communications link comprises one of a plurality of radio infrastructures having distinct transmission characteristics, said wireless link conversion means comprising means for converting a plurality of distinct wireless link transmission formats, utilized by said radio infrastructures, into said network interface format.

8. An apparatus for transporting data according to claim 7, wherein said plurality of distinct wireless link transmission formats comprise conventional point-to-point, conventional repeater-based, LTR trunking, Motorola trunking, Ericsson EDACS voice path trunking, EDACS RDI data path trunking, and EDACS IMC voice path.

9. An apparatus for transporting data according to claim 1, further comprising a plurality of said network interface means connected by a local network and a synchronization means for synchronizing the transfer of information between said network interface means, said information comprising routing tables and health and status information.

10. An apparatus for transporting data according to claim 1, further comprising means for detecting and correcting errors in transmission of said transported data between said remote device and said host communication network.

11. An apparatus for transporting data according to claim 1, wherein said network interface means further comprises a plurality of wireless communication interface means adapted to transfer said transported data to a plurality of wireless communications links.

12. An apparatus for transporting data according to claim 1, wherein said network interface means further comprises a plurality of host network communication interface means adapted to transfer said transported data to a plurality of host communication networks.

13. A method of end-to end data communications where data is transported via incompatible transmission formats in a transparent manner between a remote device and a host communication network using a wireless communications link, said remote device and said wireless communications link being connected to a mobile data controller, said host communication network and said wireless communications link being interfaced by a network interface device logically residing of said host communication network as a protocol-appropriate communications controller, said method comprising the steps of:

converting, at said mobile data controller, data to be transported between said remote device and said host communication network, said converting step converting said transported data between a remote device transmission format utilized by said remote device and one of a plurality of digital and analog wireless link transmission formats utilized by said wireless communications link;

transporting said transported data over said wireless communications link in accordance with said one of said wireless link transmission formats;

receiving, at said network interface device, said transport data from said wireless communications link;

converting, at said network interface device, said transported data between said one of said wireless link transmission formats and a network interface format utilized by said network interface device, said one of said wireless link transmission formats and said host network format being incompatible;

further converting, at said network interface device, said transported data between said network interface format and a host network format utilized by said host communication network; and

forwarding said transported data to said host communication network in accordance with said host network format.

14. An apparatus for end-to-end data communications where data is transported via incompatible transmission formats in a transparent manner between a remote device and a host communication network using a wireless communications link, comprising:

;

a mobile data controller connected to said remote device, said mobile data controller communicating over said wireless communications link to said host communication network, said mobile data controller comprising a remote device communication interface module which converts data to be transported between said remote device and said host communication network, said remote device communication interface module converting said transported data between a remote device transmission format utilized by said remote device and one of a plurality of analog and digital wireless link transmission formats utilized by said wireless communications link;

a network protocol-appropriate communication controller logically residing on said host communication network, said network controller comprising;

(a) a wireless link conversion device which converts said transported data between said one of a plurality of wireless link transmission formats and a network interface format utilized by said network interface device; and

(b) a host network conversion device which converts said transported data between said network interface format and a host network format utilized by said host communication network,

wherein said transported data is transported over said wireless communication in accordance with said wireless link transmission format, and wherein said remote device transmission format, said wireless link transmission format, said network interface format and said host network format are dissimilar formats.

15. An apparatus for transporting data according to claim 14, wherein said network interface device comprises a remote network controller.

16. An apparatus for transporting data according to claim 15, wherein said remote network controller is connectable to a plurality of different types of host communication networks having distinct transmission characteristics.

17. An apparatus for transporting data according to claim 14, wherein said mobile data controller is connectable to a plurality of different types of remote devices having distinct operational characteristics.

18. An apparatus for transporting data according to claim 17, wherein said plurality of different types of remote devices comprise a portable computer, a portable bar code reader, a portable credit card reader, a printer, and a remote telemetry unit.

19. An apparatus for transporting data according to claim 16, wherein said plurality of distinct wireless link transmission formats comprise conventional point-to-point, conventional repeater-based, LTR trunking, Motorola trunking, Ericsson EDACS voice path trunking, EDACS RDI data path trunking, and EDACS IMC voice path.

20. An apparatus for transporting data according to claim 14, further comprising a plurality of said network interface devices connected by a local network and a synchronization device for synchronizing the transfer of information between said network interface devices, said information comprising routing tables and health and status information.

21. An apparatus for transporting data according to claim 14, further comprising device for detecting and correcting errors in transmission of said transported data between said remote device and said host communication network.

22. An apparatus for transporting data according to claim 14, wherein said network interface device further comprises a plurality of wireless communication interface devices adapted to transfer said transported data to a plurality of wireless communications links.

23. An apparatus for transporting data according to claim 14, wherein said network interface device further comprises a plurality of host network communication interface devices adapted to transfer said transported data to a plurality of host communication networks.