Patent ID: 8045924
Filing Date: 2011-10-25
Classification: H04W

Abstract:
1. A scheduling method of a Base Station (BS) in a mobile communication system, the method comprising: calculating scheduling utility values of each Mobile Station (MS), based on interference from at least one neighbor BS and an average transmission rate of each MS; forming a first candidate MS list by selecting a predetermined number of MSs according to a utility value based on the interference from the at least one neighbor BS and the average transmission rate of each MS; receiving a second candidate MS list from the at least one neighbor BS; calculating channel transmission rates of candidate MSs included in the first candidate MS list and the second candidate MS list; and selecting at least one MS maximizing the channel transmission rates, wherein if the interference from the neighbor BSs are where one of the neighbor BSs does not interfere and where all of the neighbor BSs interfere, the scheduling utility values calculation comprises calculating the scheduling utility values by where ΔU k j (t) denotes a utility function for selecting the candidate MSs, r k (t−1) denotes an average transmission rate of an MS k at a time (t−1), w k denotes a weight value that differentiates a Quality of Service (QoS) of MS k, α denotes a parameter for controlling fairness and a transmission rate in a scheduler, C(·) denotes a normalized channel capacity function having an Signal-to-Interference and Noise Ratio (SINR) as an input, p denotes a maximum transmit power of a BS j, σ k 2 denotes the thermal noise of MS k, and g kn (t) denotes a path loss between a BS n and the MS k, and is a sum of path losses between the MS k and neighbor BSs.