Patent ID: 6480472
Filing Date: 2002-11-12
Classification: H01L,H04B,H04L,H04W,Y02D

Abstract:
A method for supervising a dedicated control channel transmitted in a discontinuous transmission (DTX) mode to a mobile station, comprising:tracking a type of frame received in a transmission, wherein said frames comprise bad frames, good frames, and empty frames; counting the number of bad frames received (COUNT1), wherein COUNT1 is incremented if a bad frame is received, reset to zero if a good frame is received; disabling a mobile station transmitter if COUNT1 exceeds a first threshold (TH1); counting the number of good frames received (COUNT2), wherein COUNT2 is incremented if a good frame is received, and reset to zero if a bad frame is received; enabling said mobile station transmitter if COUNT2 exceeds a second threshold (TH2); setting a fade timer if COUNT2 exceeds a third threshold (TH3); disabling said mobile station transmitter and terminating said received transmission if said fade timer expires before COUNT1 is reset to zero; counting the number of empty frames received (COUNT3), wherein COUNT3 is incremented if an empty frame is received, and reset to zero if a good frame is received; disabling said mobile station transmitter if COUNT3 exceeds a fourth threshold (TH4); and terminating said received transmission if COUNT3 exceeds a fifth threshold (TH5), wherein TH5 is greater than TH4, or upon completion of said received transmission.