Energy-Efficient Time-Domain Equilibrium Scheduling and Optimization Scheme for Energy Harvesting-Powered D2D Communication

Table 1

Important notations.

Symbol	Definition
	EH-DP/CU group number, which belongs to
	Cellular user in th EH-DP/CU group
	EH-DP user in th EH-DP/CU group
	Cellular user set, where
	EH-DP user set in th EH-DP/CU group, where
	Transmission rate of user () in an instantaneous time slot
	Minimum transmission rate of each user in each time slot
	Time slot, where
	Transmission power of user in an instantaneous time slot
	Maximum transmission power of each user in each time slot
	Transmission indicator parameter, 1 indicates that the th D2D pair is chosen to transmit in time slot , otherwise
	Channel gain between nodes and
	Noise power
	Channel bandwidth of each cellular user
	Density of noise power
	Harvested energy of th D2D user in an instantaneous time slot
	Energy harvesting efficiency of th D2D user