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Keyless entry multi-channel RKE system

  • US 20080197987A1
  • Filed: 02/15/2007
  • Published: 08/21/2008
  • Est. Priority Date: 02/15/2007
  • Status: Active Grant
First Claim
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1. A remote keyless entry system for a transportation vehicle comprising:

  • a portable communication device including a transmitter for broadcasting remote keyless entry commands on any one of a plurality of channels, the portable communication device generating a remote keyless entry command in response to a manual activation identifying a remote keyless entry action, the transmitter broadcasting the remote keyless entry command using a preferred channel in response to the manual activation; and

    a vehicle based electronic control module for communicating with the portable communication device and for controlling keyless entry functions within the transportation vehicle, the electronic control module including a receiver for receiving remote keyless entry commands at any one of the plurality of channels, the electronic control module including a RSSI circuit for determining a preferred channel having a lowest noise level, the electronic communication module further including controller for monitoring transmitted remote keyless entry commands from the portable communication device at the preferred channel for a predetermined interval, the controller re-determining the preferred channel after the predetermined interval and repeating the monitoring for a transmitted remote keyless entry command on the re-determined preferred channel, the electronic control module further including a transmitter for transmitting a channel status update signal to the portable communication device identifying the preferred channel during predetermined events;

    wherein the portable communication device determines whether the electronic control module acknowledges the transmitted remote keyless entry command, and wherein the portable communication device recursively transmits the remote keyless entry command at each of the plurality of channels until the vehicle controller acknowledges the transmitted remote keyless entry command.

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