On the choice of a radio interface for high speed radio LAN's

This paper describes parameters and options relevant to OSI layers 1 and 2 when designing a broadband radio interface. For each layers, statements are illustrated with the description of possible options for the specification of Hiperlan type 2 standard, such as: the modulation, system parameters, a rchitecture, duplex schemes, interworking with network protocols. Then, it is briefly described which parameters are essentials for the joint optimisa tion of lavers 1 and 2: switching frequency time, turnaround time, MAC-PDU, frame duration, collision detection and radio measurements.