Implementing a Base Station Using the Sdr Platform for Coexistence of Heterogeneous Wireless Systems

We propose a new approach to solving the spectrum scarcity problem, called spectrum access scheduling (SAS), which allows heterogeneous wireless systems to share the same spectrum band using protocol engineering methods. SAS treats the collection of wireless systems as an ecosystem, and optimizes the system performance by collaborative designs. The key architectural component in realizing SAS is the base stations of the wireless systems. We implement a base station using state-of-the-art software and hardware components, namely GNU Radio, OpenBTS and USRP software and hardware platforms, and demonstrate the feasibility of the coexistence of two heterogeneous wireless systems, GSM and CSMA, in the GSM-900 band.