PROJECT TITLE :

Cognitive and Energy Harvesting-Based D2D Communication in Cellular Networks: Stochastic Geometry Modeling and Analysis

ABSTRACT:

While cognitive radio allows spectrum-efficient wireless communication, radio frequency (RF) energy harvesting from ambient interference is an enabler for energy-economical wireless communication. During this paper, we model and analyze cognitive and energy harvesting-primarily based device-to-device (D2D) communication in cellular networks. The cognitive D2D transmitters harvest energy from ambient interference and use one in all the channels allotted to cellular users (in uplink or downlink), that is known as the D2D channel, to speak with the corresponding receivers. We have a tendency to investigate 2 spectrum access policies for cellular communication within the uplink or downlink, specifically, random spectrum access (RSA) policy and prioritized spectrum access (PSA) policy. In RSA, any of the offered channels together with the channel utilized by the D2D transmitters will be selected randomly for cellular communication, while in PSA the D2D channel is employed solely when all of the opposite channels are occupied. A D2D transmitter will communicate successfully with its receiver only when it harvests enough energy to perform channel inversion toward the receiver, the D2D channel is free, and the signal-to-interference-and-noise ratio $(ssr SINR ) $ at the receiver is higher than the required threshold; otherwise, an outage occurs for the D2D communication. We tend to use tools from stochastic geometry to guage the performance of the proposed communication system model with general path-loss exponent in terms of outage likelihood for D2D and cellular users. We have a tendency to show that energy harvesting will be a reliable different to power cognitive D2D transmitters whereas achieving acceptable performance. Below the identical $ssr SINR $ outage needs as for the non-cognitive case, cognitive channel access improves the outage likelihood for D2D users for both the spectrum access polic- es. When compared with the RSA policy, the PSA policy provides a better performance to the D2D users. Conjointly, using an uplink channel provides improved performance to the D2D users in dense networks when put next to a downlink channel. For cellular users, the PSA policy provides virtually the identical outage performance as the RSA policy.