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In this paper, we consider cell selection to maximize the expected capacity in heterogeneous cellular networks where a number of femtocells operate in the macrocell. Conventional cell selection schemes based on the received signal strength or the signal-to-interference plus noise power ratio may not maximize the ergodic capacity because the operation condition of macrocell and femtocell can be different. By estimating the expected capacity of adjacent cells, users near the cell boundary can select the serving cell to maximize the transmission rate. Finally, the performance of the proposed scheme is verified by computer simulation.