I. Introduction
Within 3GPP the LTE is targeted to improve coverage and increase data rate [1]. The downlink of 3GPP LTE system uses Orthogonal Frequency Division Multiple Access (OFDMA) as the multiple access technique. Due to inherent property of OFDMA the intra-cell interference is avoided however the inter-cell interference remains the main source of interference which limits the system performance, especially at the cell edge, which is extremely sensitive to the interference conditions. Inter-cell interference coordination (ICIC) is one method to improve coverage and increase cell edge bit rate [2]. The ICIC has been extensively studied in the downlink for 3GPP LTE for controlling the interference between the cells in order to improve the cell edge user performance [3].