Two different use cases are considered in this paper: the
fixed and the mobile. The fixed use case is similar to that of
wireless DSL: the customer uses wireless broadband services
from a fixed location, home or office, in a similar way as he
would use them with DSL or cable modem access. In the
mobile case, the use case resembles smart phone access from a
car: the customer uses wireless broadband services from any
location within coverage area, including the mobility of user
at speeds of up to 250 km/h.