QoS provision inter-cell Interference Coordination approach based on joint transmission and Superposition Coding

Abstract

In this paper, we address the problem of Intercell Interference Coordination (ICIC) in Orthogonal Frequency Division Multiple Access (OFDMA) networks. We design a novel Coordinated Multi-Point (CoMP) transmission scheme supporting user's simultaneous transmission via the Superposition Coding (SC) concept. Furthermore, taking advantages of the Joint Transmission (JT), signals transmitted simultaneously from the most interfering cells could be applied to assist the transmission instead of acting as interference. We consider a heterogeneous network where Granted Bit Rate (GBR) users coexist with Best Effort (BE) users. We propose an efficient bit guaranteed resource allocation scheme aiming to ensure the needed Quality of Service (QoS) of the diverse traffic patterns. Simple scheduling scheme is developed to solve the formulated combinatorial optimization problem through determining the set of scheduled users over each Physical Resource Block (PRB) and the set of cooperating Base Stations (BSs). Numerical results show the robustness of our proposed scheme in enhancing the system performance.