A Multi-Mode MAC Protocol Integrating FDD and TDD for Next Generation Multi-Hop Mobile Radio Networks

There are two basic duplexing schemes for present and future mobile radio networks, frequency-division duplexing and time-division duplexing. In general each of these methods has its benefits and drawbacks. However, both schemes are more or less appropriate under consideration of the communication environment. 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. Data services will require a ubiquitous mobile radio system and demand better quality of service, like high data rates and low delays.