摘要
Recently,driven by the technology innovations and application requirements,wireless network technologies developed rapidly with high data rate and wide system bandwidth,which have already changed the way that people usually
Recently, driven by the technology innovations and application requirements, wireless network technologies developed rap- idly with high data rate and wide system bandwidth, which have already changed the way that people usually communication with each other. As different radio access technologies based wireless networks are deployed extensively in big cities and rural areas, we are facing challenges of heterogeneous network coexistence. Furthermore, radio spectrum is an essential and non-renewable resource for wireless communication, which is facing the spectrum scarcity and spectrum underutilized prob- lems. Therefore, how to realize heterogeneous network convergence and how to improve spectrum efficiency are big issues in future wireless networks.
