A Categorized Resource Sharing Mechanism for Device-to-Device Communications in Cellular Networks

Table 1

Simulation parameters.

Cell radius	500 m
Maximal distance between one D2D pair	50 m
Number of cellular users	25
Number of D2D pairs	25
Bandwidth per RB	180 kHz
Path-loss model	dB
Target bit error rate
The probability threshold
Power level of thermal noise	dBm/Hz
The mean of multipath fading	dB
The standard deviation of shadowing	dB

Note that BER is an important effect factor on the throughput for systems; that is, the larger the BER, the smaller the achievable throughput. Thus, we add it to the simulation parameters for the calculation of achievable throughput.