Parallel Operation of Half-and Full-Duplex FDD in Future Multi-Hop Mobile Radio Networks

There are two basic duplexing schemes for present and future mobile radio networks, Frequency-Division Duplex (FDD) and Time-Division Duplex (TDD). In general each of these methods has its benefits and drawbacks. However, both schemes have their scenarios where they perform best. In future mobile radio systems typical wireless data communication will not only occur in metropolitan area scenarios like hotspots in airports, city centers, exhibition halls, etc., but also in wide area environments, e.g. a moving car in a rural environment. In general TDD is more appropriate for dense metropolitan area scenarios whereas FDD has benefits in wide area environments.