MULTI-ANTENNA INTERFERENCE COORDINATION IN DEVICE-TO-DEVICE ASSISTED HETEROGENEOUS CLOUD RADIO ACCESS NETWORKS

In this paper, a stochastic geometry based framework is developed to investigate the performance of multi-antenna interference coordination utilizing two remote radio head (RRH) cooperation schemes namely, zero force beamforming (ZFBF) and non-coherent joint coordinated transmission (NC-JCT). Studies have shown that despite the benefit offered by RRH cooperation in improving the performance of some selected down link users, this gain actually comes at the cost of disabling other downlink users from being served on the same channels and thus leading to inefficient spectral resource utilization. To address this problem, Device-to-Device (D2D) communication is utilized to serve as an alternative for users, which has shown to be effective in improving the spectral utilization. Results from the analysis indicates that enabling D2D communication can effectively offload the heterogeneous cloud radio access network (H-CRAN) and provide significant benefits in terms of improved spectral utilization. The results also show that the area spectral efficiency (ASE) of D2D users when ZFBF scheme is applied performs better than that of NC-JCT counterpart.

Authors : M. A. Abana, R. Usman and K. L. Mathew

Category : Open Access     Volume (Issue) : 5(2)     Date Uploaded : 26th May 2020

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