Communication protocol for use with portable electronic devices

  • US 8,346,987 B2
  • Filed: 10/13/2011
  • Issued: 01/01/2013
  • Est. Priority Date: 05/22/2006
  • Status: Active Grant
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First Claim
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1. A method comprising:

  • sending, by a portable media device to an accessory, a first command requesting information about asynchronous data transfer capabilities of the accessory;

    receiving, by the portable media device from the accessory, information about the asynchronous data transfer capabilities of the accessory;

    sending, by the portable media device to the accessory, a second command requesting an address associated with the accessory;

    receiving, by the portable media device from the accessory, the address associated with the accessory;

    sending, by the portable media device to the accessory, a third command, the third command including a data frame and a destination address for a destination device; and

    instructing, by the portable media device, the accessory to transmit the data frame to the destination device, wherein a source address assigned to the data frame transmitted to the destination device is the address associated with the accessory.

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