Long Term Evolution in unlicensed band extends the benefits of Long Term Evolution and Long Term Evolution - Advanced to deploy in 5 GHz unlicensed spectrum, enabling mobile operators to offload data traffic onto unlicensed frequencies. The License Assisted Access with Long Term Evolution allows co-existence with Wi-Fi through carrier aggregation. The recently evolved intelligent technology viz. Cognitive radio which supports the efficient spectrum utilization is applied in the proposed system model to detect the white spaces in 5 GHz band to accomplish Listen-Before-Talk regulatory requirement of radio communication in Long Term Evolution - unlicensed band. Another major goal of Long Term Evolution - unlicensed to co-existence along with Wi-Fi/Internet of Things users in a non-interference style is also accomplished by the use of Cognitive radio. Simulation results demonstrate their coexistence along with effectiveness of resource allocation in a varying 5 GHz compatible 802.11 wireless local area networks environment.