Network MIMO with Interference Cancellation for Cloud-Cooperated Wireless Sensor Networks

In this paper, we propose a new multiple access scheme based on Network MIMO technique in wireless sensor networks (WSNs). The slotted ALOHA type protocol with successive interference cancellation (SIC) is the promising scheme to meet the requirements of the IoT society which will come within the decades. One of the most effective methods is the one with using the capture effect. However, there used to be the typical sensor node (SN) arrangements which do not make the packets with sufficient power unbalance at the fusion center (FC). Even in the model applies SIC taking advantage of the capture effect, temporal diversity and spatial diversity, those arrangements may still happen. The proposed method allows fusion centers to decode those packets by exploiting the signal separation method of network MIMO system. The results of the computer simulation show that the proposed method can increase the number of SNs which can send the data without degrading the quality of service.