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Cell Boundary User Performance in Multi-User MIMO Poisson Voronoi Cell

The performance of cell-boundary user terminal (UT) that has two closest base stations (BSs), in multi-user multiple-input multiple-output Poisson Voronoi cell, is investigated here. Specifically, the closed-form expressions for the coverage probability of cell-boundary UT with and without neighbouring BS interference are given out. Analytical results show that the ergodic rate (relates to the coverage probability) of cell-boundary UT is about 30% of that of inner UT and 1.6 times of worst-case UT, respectively. Furthermore, when the ratio of number of BS antennas to that of UTs is fixed, the coverage probability of cell-boundary UT converges to a constant as the number of BS antennas tends toward infinity. Finally, the comparison with exact performance of cell-boundary UT under an actual network deployment is conducted to judge the accuracy of the theoretical results under homogeneous Poisson point process model.