Patent ID: 7616596
Filing Date: 2009-11-10
Classification: H04W

Abstract:
1. An uplink scheduling method of a Base Transceiver Station (BTS) in a wireless mobile communication system in which a mobile station reports a headroom value to the BTS, the method comprising the steps of: normalizing the headroom value indicating an amount of currently used transmission power and additionally usable transmission power according to a pre-set reference transmission format; determining a mean data rate of the mobile station; and determining a priority of the mobile station considering the normalized headroom value and the mean data rate, wherein the pre-set reference transmission format includes at least one of a modulation method, a coding rate, and a number of slots allocated, and wherein the priority of the mobile station is determined using where E(data rate) denotes a mean data rate of the mobile station, SINR denotes a signal to interference and noise ratio, Data Rate(SINR) denotes a current SINR by the E(data rate), MCS previous denotes the MCS previously allocated to the mobile station, Data Rate(QPSK ½) denotes the data rate for the reference MCS level, N slot (Headroom, QPSK ½) denotes the number of allocated slots for the normalized headroom value according to the reference MCS level, denotes the first difference, MPR denotes Modulation order Product code Rate, denotes the second difference, α denotes a fairness exponent value for fair scheduling, U min,nrtPS denotes a factor for reflecting a minimum reserved traffic rate, U max denotes a value for reflecting a maximum sustained traffic rate, and W denotes a weight factor for reflecting a traffic priority according to connection.