×

Indication of coverage area limits within digital communication systems

  • US 5,991,901 A
  • Filed: 08/19/1994
  • Issued: 11/23/1999
  • Est. Priority Date: 02/11/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for a communication unit to alert a user, in such a manner so as not to degrade audio quality, when the communication unit is approaching limits of a transmitting source'"'"'s coverage area, the method comprises the steps of:

  • a) monitoring, by the communication unit, error correction of received digital signals, wherein the received digital signals are transmitted by the transmitting source;

    b) determining, by the communication unit, results of the error correction;

    c) comparing, by the communication unit, the results of the error correction with a first predetermined threshold, wherein the first predetermined threshold is set within a range of optimal error correction rate to non-operable error correction rate; and

    d) generating, by the communication unit, an indication that the results of the error correction exceeds the first predetermined threshold such that the user of the communication unit is alerted that the communication unit is approaching the limits of the transmitting source'"'"'s coverage area, where the indication is a simulated analog RF channel noise signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×