Study on the User Density Identification via Improved Whale Optimization Algorithm in Device-to-Device Communication

Table 1

Simulation parameters.

No.	Performance index	Value
1	Cell radius,	400 m
2	Number of D2D user pairs,	10 : 10 : 80
3	Number of cellular users,	10
4	Maximum power of the DU,	15 dBm
5	Maximum power of the CU,	24 dBm
6	Minimum distance of D2D users,	10 m
7	Maximum distance of D2D users,	50 m
8	SINR threshold of the CU,	2
9	SINR threshold of the DU,	2
10	Total resources of the cell,	100
11	Noise power density,	−174 dBm/Hz
12	Subchannel bandwidth,	180 kHz
13	Path loss model of the DU	148 + 40log10(d)
14	Path loss model of the CU	128.1 + 36.7log10(d)