Simultaneous Uplink and Downlink Transmission Scheme for Flexible Duplexing

The idea of adaptive usage of uplink frequency resources for other purposes, such as downlink data transmission, has attracted researchers for many years. As an extension of the conference paper on the same subject, this article discusses the concept of applying a multichannel simultaneous uplink and downlink transmission scheme for flexible duplexing, where the middle part of the so-called uplink component carrier is used for downlink data delivery. The realization of such an idea is based on the adaptive change of the transmit/reception mask at the base stations and/or mobile devices and the application of the non-contiguous transmission scheme. Beside a theoretical analysis, this paper provides the calculation results of the interference rise in the system.