Bridging apparatus for interconnecting a wireless PAN and a wireless LAN

• US 20020196771A1
• Filed: 05/22/2002
• Published: 12/26/2002
• Est. Priority Date: 07/20/2000
• Status: Active Grant

• Current Assignee: Cadence Design Systems Incorporated (Cadence Group)
• Original Assignee: Cadence Design Systems Incorporated (Cadence Group)
• Inventors: Gerrard, Carl A., Li, Bin, Gardner, Larry, Swan, Richard, McCoy, Tim, Vij, Vikram, Chander, Sivasankar, Kunchakarra, Murthy
• Granted Patent: US 7,095,748 B2
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

A Wireless bridge conjoins two previously incompatible technologies within a single device to leverage the strengths of each. The Wireless bridge marries the Personal Area Network (PAN) technology of Bluetooth as described in Bluetooth Specification Version 1.0B with the Wireless Local Area Network (WLAN) technology described in the IEEE802.11a specification to provide a wireless system level solution for peripheral devices to provide Internet service so interactions. The invention brings together in a single working device implementations of these technologies so they do not interfere or disrupt the operation of each other and instead provide a seamless transition of a Bluetooth connection to Wireless Local Area Network/Internet connection. From the Wireless Local Area Network perspective the inventive wireless bridge extension allows a Bluetooth-enabled device to roam from one Wireless Access Point (bridge) to the next without losing its back end connection. The invention takes into account the minimum separation and shielding required of these potentially conflicting technologies to inter-operate.

Claims

1. A two-way wireless communication system comprising:

a plurality of wireless personal area network devices;

a wireless local area network device; and

a wireless bridge apparatus having a first transceiver module for two-way data communication with said personal area network devices and having a second transceiver module for two-way data communication with said local area network device.

2. The communication system recited in claim 1 further comprising a remote Internet-connected backend server for communicating with said local area network device and thus said personal area network devices via said wireless bridge.

3. The communication system recited in claim 1 wherein said first transceiver module and said second transceiver module operate at different frequencies.

4. The communication system recited in claim 1 wherein said second transceiver module has a bandwidth sufficiently wide to provide substantially simultaneous communication with up to seven said personal area network devices.

5. The communication system recited in claim 1 wherein said wireless bridge apparatus provides a first coverage area for communication with said personal area network devices and a second coverage area for communication with said local area network device;

said first area being smaller than said second area and being entirely contained within said second area.

6. The communication system recited in claim 1 wherein in each said personal area network device has a unique address and wherein said system comprises a plurality of said wireless bridge apparatuses for said two-way wireless communications over a plurality of distinct adjacent first areas;

said local area network device maintaining substantially constant two-way data communications with each said personal area network device during roaming from one said distinct adjacent first area to another said distinct adjacent first area.

7. The communication system recited in claim 6, wherein each said wireless bridge apparatus provides a first coverage area for communication with said personal area devices and a second coverage area for communication with said local area network device;

each said first area being smaller than each said second area and being entirely contained within a corresponding second area.

8. The communication system recited in claim 3 wherein said first transceiver module operates at a frequency that is below 5 GHz and wherein said second transceiver module operates at a frequency that is above 5 GHz.

9. The communication system recited in claim 4 wherein the bandwidth of said second transceiver module is at least ten times the bandwidth of said first transceiver module.

10. The communication system recited in claim 2 wherein said remote Internet-connected backend server cannot reliably communicate directly with said personal area network devices because of the limited coverage area of said personal area network devices.

11. A two-way wireless communication system for data transmission between at least one personal area network device and a remote server located beyond the range of the personal area network device;

the communication system comprising;

a wireless local area network device in communication with said remote server; and

a wireless bridge apparatus having a first transceiver module for two-way data communication with said personal area network device and having a second transceiver module for two-way data communication with said local area network device.

12. The communication system recited in claim 11 further comprising an Internet connection for communicating with said remote server and thus said personal area network device via said wireless bridge.

13. The communication system recited in claim 11 wherein said first transceiver module and said second transceiver module operate at different frequencies.

14. The communication system recited in claim 11 wherein said second transceiver module has a bandwidth sufficiently wide to provide substantially simultaneous communication with up to seven said personal area network devices.

15. The communication system recited in claim 11 wherein said wireless bridge apparatus provides a first coverage area for communication with said personal area network device and a second coverage area for communication with said local area network device;

said first area being smaller than said second area and being entirely contained within said second area.

16. The communication system recited in claim 11 wherein in said personal area network device has a unique address and wherein said system comprises a plurality of said wireless bridge apparatuses for said two-way wireless communications over a plurality of distinct adjacent first areas;

said local area network device maintaining substantially constant two-way data communications with said personal area network device during roaming from one said distinct adjacent first area to another said distinct adjacent first area.

17. The communication system recited in claim 16, wherein each said wireless bridge apparatus provides a first coverage area for communication with said personal area devices and a second coverage area for communication with said local area network device;

each said first area being smaller than each said second area and being entirely contained within a corresponding second area.

18. The communication system recited in claim 13 wherein said first transceiver module operates at a frequency that is below 5 GHz and wherein said second transceiver module operates at a frequency that is above 5 GHz.

19. The communication system recited in claim 14 wherein the bandwidth of said second transceiver module is at least ten times the bandwidth of said first transceiver module.

20. The communication system recited in claim 12 wherein said remote Internet-connected backend server cannot reliably communicate directly with said personal area network device because of the limited coverage area of said personal area network device.

21. A two-way wireless data communication system for use at a commercial site, the site having at least one kiosk through which a consumer may conduct a transaction for goods or services using a PAN device, the site also having a data server remote from the kiosk and too distant from the consumer'"'"'s PAN device to communicate directly with the PAN device;

the communication system enabling two-way real time data transfer between the PAN device and the remote server and comprising;

a wireless local area network device connected to said remote server; and

a wireless bridge apparatus having a first transceiver module for two-way data communication with said PAN device and having a second transceiver module for two-way data communication with said local area network device.

22. The communication system recited in claim 21 wherein said first transceiver module and said second transceiver module operate at different frequencies.

23. The communication system recited in claim 21 wherein said second transceiver module has a bandwidth sufficiently wide to provide substantially simultaneous communication with up to seven said PAN devices.

24. The communication system recited in claim 21 wherein said wireless bridge apparatus provides a first coverage area for communication with said PAN device and a second coverage area for communication with said local area network device;

said first area being smaller than said second area and being entirely contained within said second area.

25. The communication system recited in claim 21 wherein in said PAN device has a unique address and wherein said system comprises a plurality of said wireless bridge apparatuses for said two-way wireless communications over a plurality of distinct adjacent first areas;

said local area network device maintaining substantially constant two-way data communications with said PAN device during roaming from one said distinct adjacent first area to another said distinct adjacent first area.

26. The communication system recited in claim 25, wherein each said wireless bridge apparatus provides a first coverage area for communication with said PAN device and a second coverage area for communication with said local area network device;

each said first area being smaller than each said second area and being entirely contained within a corresponding second area.

27. The communication system recited in claim 22 wherein said first transceiver module operates at a frequency that is below 5 GHz and wherein said second transceiver module operates at a frequency that is above 5 GHz.

28. The communication system recited in claim 23 wherein the bandwidth of said second transceiver module is at least ten times the bandwidth of said first transceiver module.

29. The communication system recited in claim 21 wherein said remote Internet-connected backend server cannot reliably communicate directly with said personal area network device because of the limited coverage area of said personal area network devices.

33. The communication system recited in claim 21 wherein said PAN device employs Bluetooth wireless protocol.

34. The communication system recited in claim 21 wherein said local area network device employs IEEE802.11a protocol.

38. The communication system recited in claim 37 wherein each said separate connection between each said multiplexing device and said server is a wireless connection.

39. The communication system recited in claim 37 wherein said coverage zones are substantially adjacent one another for substantially continuous communications between said moveable device and said server as said moveable device leaves one said coverage zone and immediately enters another said coverage zone.

40. The communication system recited in claim 37 wherein each said multiplexing device comprises a wireless bridge having distinct transceivers for communicating with said moveable device and said server.

30. A two-way wireless data communication system for use at a commercial site, the site having at least one kiosk through which a consumer may conduct a transaction for goods or services using a PAN device, the site also having a data server remote from the kiosk and too distant from the consumer'"'"'s PAN device to communicate directly with the PAN device;

the communication system enabling two-way real time data transfer between the PAN device and the remote server and comprising;

a wireless local area network device connected to said remote server; and

a wireless bridge apparatus having a first transceiver module for two-way data communication with said PAN device and having a second transceiver module for two-way data communication with said local area network device;

wherein said commercial site is a vehicle service station and said kiosk provides at least one gasoline pump.

31. The communication system recited in claim 30 wherein said PAN device is a communication module mounted in a vehicle at said vehicle service station.

32. The communication system recited in claim 30 wherein said PAN device is a hand-held PDA.

35. The communication system recited in claim 30 wherein said wireless bridge apparatus is located in proximity of said gasoline pump.

36. A method for providing a data communication interface in a vehicle service station having a plurality of gasoline pumps located remote from a station Internet-connected backend server, the interface being between at least one wireless PAN device and the Internet-connected backend server;

the method comprising the steps of;

placing a wireless LAN transceiver and a wireless PAN transceiver within a data transfer bridge;

locating said bridge within a first selected distance from said pumps, said first selected distance being within the maximum range of said PAN device;

connecting said Internet-connected backend server to a LAN communications apparatus;

locating said LAN communications apparatus within a second selected distance from said bridge, said second selected distance being within the maximum range of said LAN transceiver; and

operating said wireless LAN transceiver and said wireless PAN transceiver at different transmission frequencies to preclude interference therebetween.

37. A communication system for providing a communications link between a moveable wireless device and a remotely located internet connected backend server, the moveable device having no internet protocol address;

the system comprising;

at least two communication multiplexing devices positioned at spaced apart locations and forming separate coverage zones for two-way communication with said moveable device when said moveable device is located in a corresponding zone;

each said multiplexing device having a unique internet protocol address and a separate connection to said server; and

automatic buffering and switching means for selecting an alternative internet protocol address and separate connection between the server and a corresponding multiplexing device when said moveable device leaves one said coverage zone and enters another said coverage zone.