PUZZLE: Enhancing Throughput by Covering Neighbor's Blanks
Jiayue Li · 2016
The coexistence between Long Term Evolution in an Unlicensed spectrum (LTE-U) and Wi-Fi has been widely recognized by the many worldwide telecommunication organizations as an urgent problem which needs to be solved. Carrier Sense Adaptive Transmission (CSAT) is an adaptive time division scheme, proposed by Qualcomm, which straightforwardly avoids signal collision between LTE-U and Wi-Fi under the 5GHz frequency domain. However, in this paper, we first illustrate how CSAT negatively impacts on Wi-Fi. Furthermore, we propose another novel concept, PUZZLE, to enhance the function of CSAT in both Wi-Fi and the overall throughput. The novelty of PUZZLE is in where it exploits the feasibility of sharing the medium from the frequency space. PUZZLE is supported by a series of logical Hardware-In-the-Loop (HIL) experiments and tested under a given spectral scenario. The final result shows that, according to the five kinds of spectral utilization scenarios we define and when compared to the traditional time division approaches, the maximum average enhancements on throughput are almost 40% on Wi-Fi and 28% on the overall network.