Energy Signal Assisted Access Method for Licensed Assisted Access
Wei Wang, Pingping Xu, Yuan Zhang, Hongyun Chu · 2017
Licensed-Assisted Access Long-Term Evolution (LAA- LTE) framework can offload excessive data stream to the unlicensed spectrum. Devices from different operators will compete for the same band and have to endure a more complex and congested channel conditions. Therefore a rapid and efficient access mechanism should be introduced in the LAA framework. Based on the Type B LBT channel access scheme, this work proposes an Energy-Based Signal Assisted Access (EBSA) mechanism. The EBSA mechanism can realize the rapid information transfer between devices belonging to different operators. Then a Markov chain model is set up and used to analyze this mechanism theoretically. Simulation results verify the validity of the theoretical analysis, and in the ultra-dense employed LAA network, the proposed method is efficient compared with the existing access mechanisms.