Improving Energy Efficiency in Cooperative MIMO with HARQ-CC Mechanism

This paper proposes energy efficiency for the physical layer and MAC layer in cooperative MIMO with hybrid automatic repeat request (HARQ) scheme. By this scheme, the retransmission count changes based on the significance of scheduling, and it reduces the packet collision. The transmit power at the physical layer determines the contending nodes and outage probability per unit area. Regarding delay and energy, accessing the channel in the MAC layer is very expensive because it requires extra time and energy to obtain the channel, and also, the antenna selection scheme in slow fading scenario is addressed. Finally, the proposed system lessens the contending nodes and delay and improves the network performance.