A Generic Interference Model for Uplink OFDMA Networks With Fractional Frequency Reuse

作者：Tabassum Hina^*; Dawy Zaher; Alouini Mohamed Slim; Yilmaz Ferkan

来源：IEEE Transactions on Vehicular Technology, 2014, 63(3): 1491-1497.

DOI：10.1109/TVT.2013.2284337

• Fractional frequency reuse (FFR)
• generalized fading channels
• greedy scheduling
• power allocation
• round robin scheduling

Fractional frequency reuse (FFR) has emerged as a viable solution to coordinate and mitigate cochannel interference (CCI) in orthogonal frequency-division multiple-access (OFDMA)-based wireless cellular networks. The incurred CCI in cellular networks with FFR is highly uncertain and varies as a function of various design parameters that include the user scheduling schemes, the transmit power distribution among multiple allocated subcarriers, the partitioning of the cellular region into cell-edge and cell-center zones, the allocation of spectrum within each zone, and the channel reuse factors. To this end, this paper derives a generic analytical model for uplink CCI in multicarrier OFDMA networks with FFR. The derived expressions capture several network design parameters and are applicable to any composite fading-channel models. The accuracy of the derivations is verified via Monte Carlo simulations. Moreover, their usefulness is demonstrated by obtaining closed-form expressions for the Rayleigh fading-channel model and by evaluating important network performance metrics such as ergodic capacity. Numerical results provide useful system design guidelines and highlight the trade-offs associated with the deployment of FFR schemes in OFDMA-based networks.

• 出版日期2014-3