×

Speed esimation for digital cordless telephones

  • US 6,819,928 B1
  • Filed: 09/09/1999
  • Issued: 11/16/2004
  • Est. Priority Date: 09/10/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of recognizing high speed movement of a digital cordless telephone set, the method comprising:

  • measuring a received electric field level of the digital cordless telephone set in a predetermined time;

    setting a field strength threshold level by adding an offset value to an average of the received electric field level;

    setting a threshold variation cycle period of a received electric field level of the digital cordless telephone set corresponding to a reference speed for the high speed movement judgment;

    measuring the variation cycle period of the received electric field level of the digital cordless telephone set between successive times the received electric field level exceeds the field strength threshold level; and

    recognizing that the digital cordless telephone set is in high speed movement when the measured variation cycle period of the received electric field level of the digital cordless telephone set becomes shorter than the threshold variation cycle period.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×