Patent ID: 7505429

Claim:
A method of determining a packet data rate in a mobile communication system, comprising: estimating a channel reception status value after a predetermined time corresponding to a predetermined window size, by assigning a weight to at least one channel reception status of an earlier time and to a channel reception status of a present time; determining a remainder value for adjusting a channel reception sensitivity value according to a decoding status of received packet data; calculating a threshold value for determining a packet data rate by applying the remainder value to the estimated channel reception status value; and determining a highest packet data rate among a set of values falling below a rate corresponding to the calculated threshold value, wherein, when the decoding status of the received data packet is represented by an ACK signal, an increment value is applied to the remainder value, and when the decoding status of the received data packet is represented by a NACK signal, a decrement value is applied to the remainder value; and wherein the increment value and decrement value are defined by a predetermined ratio, and the predetermined ratio is PER/(1−PER), where PER is a target packet error rate.