Wireless infrared network transceiver

• US 7,142,786 B2
• Filed: 06/03/2002
• Issued: 11/28/2006
• Est. Priority Date: 06/03/2002
• Status: Expired due to Fees

• Current Assignee: Clearmesh Networks Incorporated
• Original Assignee: Clearmesh Networks Incorporated
• Inventors: Ulmer, Christopher T., Hakakha, Harel, Chiu, Joseph, Adhikari, Prasanna, Moursund, Carter M.
• Primary Examiner(s): Li, Shi K.
• Application Number:
  US10/162,541
• Publication Number:
  US 20030224735A1
• Time in Patent Office: 1,639 Days
• Field of Search: 398/118, 398/122, 398/129, 398/131
• US Class Current: 398/118
• CPC Class Codes: H04B 10/1123 Bidirectional transmission
• CPC Class Codes: H04B 10/43 using a single component as both light source and receiver, e.g. using a photoemitter as a photoreceiver

Abstract

A digital data network uses network nodes incorporating infrared transceivers. Each node includes a plurality of infrared transceivers having transmitter and receiver optics designed to facilitate line-of-sight infrared optical communications in a residential or business neighborhood. New nodes are installed with at least one selected transceiver having line-of-sight access to at least one existing transceiver. Automated tracking and acquisition processes are used to align transceivers to enable data communication and to acquire newly installed nodes into the network.

Other automated tracking programs operate on an as-needed or scheduled basis to maintain good alignment and communications between adjoining node transceivers.

Network nodes include weather-proof housings and are of a size and shape to be easily mounted on existing structures so as not to disrupt the visual appeal of a neighborhood.

Claims

1. An infrared transceiver node, comprising:

a support assembly;

at least two infrared transceivers connected to said support assembly, each of said infrared transceivers including

a single light source consisting of an infrared transmitter including a light-emitting diode and a transmitter lens for generating an infrared beam having a beam divergence of in the range of about 0.5 to 1 degree,

an infrared receiver including a receiver lens and a photo detector, for receiving an infrared beam and for converting said infrared beam to an electronic signal,

a first drive assembly for adjusting the elevation of said infrared transceiver,

a second drive assembly for adjusting the azimuth of said infrared transceiver, and

a processor connected to each of said first and second drive assemblies for controlling the azimuth and elevation of said infrared transceiver;

a connector for connecting said infrared transceiver node to a user computer; and

a switching engine connected to said connector and to each of said at least two infrared transceivers for switching data between said user computer and said at least two infrared transceivers.

2. An infrared transceiver node in accordance with claim 1 wherein said photo detector comprises an avalanche photo diode;

and

said receiver further includes a dome lens for focusing infrared signals on said avalanche photo diode.

3. An infrared transceiver node in accordance with claim 1 and further including a weatherproof housing containing said support assembly, and wherein:

said weatherproof housing contains an indicator for positioning said weatherproof housing relative to a compass direction; and

said at least two infrared transceivers positioned relative to said indicator.

4. An infrared transceiver node in accordance with claim 3 wherein:

said support assembly includes a shaft;

each of said at least two infrared transceivers positioned with the infrared transceiver and the infrared receiver generally perpendicular to said shaft.

5. An infrared transceiver node in accordance with claim 4 wherein said infrared transceiver node includes four infrared transceivers.

6. An infrared transceiver node in accordance with claim 1 and further including means for connecting each of said at least two infrared transceivers to a network system server.

7. An infrared transceiver node in accordance with claim 6 wherein said means for connecting each of said at least two infrared transceivers to a network system server is selected from the group comprising a modem contained in said infrared transceiver node and a wireless radio frequency transceiver contained in said infrared transceiver node.

8. An infrared transceiver node in accordance with claim 1 wherein said data comprises IP data;

and

said infrared transceiver node further including means for managing said incoming and outgoing data in accordance with IP protocols.

9. An infrared transceiver node in accordance with claim 1 and further including:

a system control board contained in said infrared transceiver node, the system control board including said switching engine;

a transceiver control board positioned on each of said at least two infrared transceivers; and

said system control board connected to each of the transceiver control boards.

10. A network of infrared transceiver nodes, comprising:

a network controller;

a plurality of infrared transceiver nodes, each of said infrared transceiver nodes including

a support assembly;

at least two infrared transceivers connected to said support assembly, each of said infrared transceivers including

a single light source consisting of an infrared transmitter including a light-emitting diode and a transmitter lens for generating an infrared beam having a beam divergence of in the range of about 0.5 to 1.0 degree,

an infrared receiver including a receiver lens and a photo detector, for receiving an infrared beam and for converting said infrared beam to an electronic signal;

a first drive assembly for adjusting the elevation of said infrared transceiver,

a second drive assembly for adjusting the azimuth of said infrared transceiver, and

a processor connected to each of said first and second drive assemblies for controlling the azimuth and elevation of said infrared transceiver;

a connector for connecting said infrared transceiver node to a user computer;

a switching engine connected to said connector and to each of said at least two infrared transceivers for switching data between said user computer and said at least two infrared transceivers;

each of said plurality of infrared transceiver nodes positioned outdoors on the surface of a support structure;

said plurality of infrared transceiver nodes relatively positioned so that each infrared transceiver node has a line-of-sight to at least one other infrared transceiver; and

means for connecting at least one of said plurality of infrared transceiver nodes to said network controller.

11. A network of infrared transceiver nodes in accordance with claim 10 wherein:

at least one of the support structures comprises the outer surface of a residential home; and

at least one of the user computers comprises a computer within said residential home.

12. A network of infrared transceiver nodes in accordance with claim 10 wherein said photo detector comprises an avalanche photo diode;

and

said infrared receiver further includes a dome lens positioned surrounding said avalanche photo diode to focus infrared light onto said photo diode.

13. A network of infrared transceiver nodes in accordance with claim 10 wherein each of said plurality of infrared transceiver nodes further includes a weatherproof housing containing said support assembly and said at least two infrared transceivers, and wherein:

said weatherproof housing contains an indicator for positioning said weatherproof housing relative to compass direction upon an initial installation of said weatherproof housing; and

said at least two infrared transceivers positioned relative to said indicator prior to said initial installation.

14. An infrared transceiver node in accordance with claim 13 wherein:

said support assembly includes a shaft;

each of said at least two infrared transceivers positioned with said infrared transmitter and said infrared receiver generally perpendicular to said shaft.

15. A network of infrared transceiver nodes in accordance with claim 14 wherein said infrared transceiver node comprises four infrared transceivers.

16. A network of infrared transceiver nodes in accordance with claim 15 wherein said means for connecting at least one of said at least two infrared transceivers to said network system server is selected from the group including a modem positioned in each of said plurality of infrared transceiver nodes and a wireless radio frequency transceiver positioned in each of said plurality of infrared transceiver nodes.

17. A network of infrared transceiver nodes in accordance with claim 10 wherein said data comprises IP data;

and

said infrared transceiver node further including means for managing said data in accordance with IP protocols.