Channel selection method for improved wireless communication

• US 20090040971A1
• Filed: 02/17/2006
• Published: 02/12/2009
• Est. Priority Date: 04/18/2005
• Status: Abandoned Application

• Current Assignee: Tyco Fire & Security GmbH (Johnson Controls International plc)
• Original Assignee: Tyco Fire & Security GmbH (Johnson Controls International plc)
• Inventors: Alicot, Jorge, Devoe, Ronald F.
• Application Number:
  US11/918,770
• Publication Number:
  US 20090040971A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A communication system (10) receiving a communication signal from a far communication system (12) has a channel selector, and a number of local transceivers (22) forming a first broadcast array and a second channel searching array. The first broadcast array is configured to receive the communication signal and transmit a local communication signal on channels. Each local transceiver is connected to a controller (32). The controller is configured to remove noise from the far communication signal. The noise includes interference from the local transceivers being received on the channel. The controller measures a parameter of at Least one of the channels. The controller determines an availability of one or some channels using the second channel searching array. The second channel searching array outputs an available channel signal to the controller. The controller (32) communicates the availability to at least one of the first broadcast array to transmit and to receive the far communication signal on the available channel.

Claims

1. A channel selection method for an improved wireless communication between a first local communication system and a second far communication system, the method comprising:

coordinating a plurality of local transmitters in a listening mode in connection with a remote wireless signal across a plurality of channels;

determining a usable channel configured to transmit from said plurality of channels by distinguishing between a signal from the first local communication system and a signal from the second far communication system;

transmitting on said usable channel.

2. The method according to claim 1, wherein said usable channel is determined by listening for said remote wireless signal and substantially ignoring interference from said first local communication system.

3. The method according to claim 1, wherein said usable channel is determined by listening for said remote wireless signal by listening at a point when a local signal from said first local communication modulates to a lowest level.

4. The method according to claim 3, wherein said lowest level is determined when said first local communication system signal modulates from a peak voltage level to a substantially off voltage level, and wherein said usable channel is determined by listening for said remote wireless signal by listening at said substantially off power level.

5. The method according to claim 1, wherein said usable channel is determined by detecting a highest voltage sample and a lowest voltage sample from at least one channel from said plurality of channels, and wherein said usable channel is determined therefrom.

6. The method according to claim 1, wherein the determining step measures both a peak radiofrequency power level and a minimum radiofrequency power level.

7. The method according to claim 6, wherein the determining step measures a parameter selected from the group consisting of a signal duration, a signal phase, a signal rise time, and a signal fall time, and any combinations thereof from both said peak radiofrequency power level signal and said minimum radiofrequency power level signal.

8. The method according to claim 1, wherein the coordination step includes steps of coordinating a plurality of local transmitters listening for a remote wireless signal across a plurality of channels and outputting a result to a data table, and accessing said data table for transmitting on said usable channel.

9. A channel selection method for an improved wireless communication between a first local communication system emitting a modulating signal and a second far communication system emitting a substantially constant signal relative to said modulating signal, the method comprising:

coordinating a plurality of local transceivers in a receiving mode configured to receive a remote wireless signal across a plurality of channels;

determining a usable channel for transmission, said usable channel being derived from said plurality of channels, wherein said usable channel is iteratively determined by distinguishing between a parameter of said modulating signal and said substantially constant signal on at least one channel, wherein when said modulating signal modulates to zero during a cycle said modulating signal is removed from said channel as interference; and

transmitting on said usable channel.

10. The channel selection method according to claim 9, wherein said parameter is selected from the group consisting of a voltage, a voltage per unit time, a signal duration, a signal phase, a signal rise time, and a signal fall time.

11. The channel selection method according to claim 10, wherein both a peak and a base of said voltage signal is received per unit time to distinguish between said parameter of said modulating signal and said substantially constant signal.

12. A communication system receiving a communication signal from a far communication system, the communication system comprising:

a channel selector;

a plurality of local transceivers configured to receive said communication signal and transmit a local communication signal on a plurality of channels, wherein each of said plurality of local transceivers are connected to a controller, said controller configured to remove an amount of interference from said plurality of local transceivers being received on said channel;

wherein said controller measures a parameter of at least one of said plurality of channels, and wherein said controller determines an availability of at least one channel of said plurality of channels, and communicates said availability to at least one of said plurality of transceivers to transmit and receive the communication signal.

13. The communication system of claim 12, wherein said channel selector changes a current channel of at least one of said plurality of transceivers to said available channel.

14. The communication system of claim 13, wherein said controller configured to remove said amount of noise from said far communication signal by removing a modulating local communication component of said communication signal.

15. The communication system of claim 14, wherein said modulating local communication component of said communication signal is attributed from at least one of said plurality of transceivers.

16. The communication system of claim 12, wherein at least some of said plurality of local transceivers form a first array and a second array, wherein said first array searches for an available channel, and wherein said second array transmits and receives signals on said available channel.

17. The communication system of claim 12, further comprising a trigger component, wherein said trigger component searches for said available channel, and said trigger component outputs a signal to said controller, said controller configured to control an array of said plurality of transceivers to receive the communication signal from the far communication system on said available channel.

18. A communication system receiving a communication signal from a far communication system, the communication system comprising:

a channel selector;

a plurality of local transceivers forming a first broadcast array and a second channel searching array, said first broadcast array being configured to receive said communication signal and transmit a local communication signal on a plurality of channels, wherein each of said plurality of local transceivers are connected to a controller, said controller configured to remove an amount of interference from said plurality of local transceivers being received on said channel;

wherein said controller measures a parameter of at least one of said plurality of channels, and wherein said controller determines an availability of at least one channel of said plurality of channels using said second channel searching array, and wherein said second channel searching array outputs an available channel signal to said controller, and said controller communicates said availability to at least one of said first broadcast array to transmit and/or receive the far communication signal on said available channel.

19. The system of claim 18, wherein said controller communicates said availability of said available channel to at least one of said first broadcast array wirelessly using another channel.

20. The system of claim 18, wherein said second channel searching array has said plurality of transceivers searching said plurality of channels during a predetermined time period, wherein each of said plurality of transceivers of said second channel searching array searches for a different amount of time relative to one another.

21. A transceiver comprising:

a generator connected to a transmit antenna;

a receive antenna connected to a receiver; and

a controller, wherein said controller is operatively connected to said generator and said receiver, said receiver receiving a plurality of signals on a wireless channel, said plurality of signals each being output to said controller, wherein said controller determines an availability of said wireless channel based in part on said plurality of signals, and wherein said controller changes said wireless channel to another available channel based on said determination.