WiMAX envisions four mobility-related usage scenarios:
Nomadic: The user is allowed to take a fixed subscriber station and reconnect from
a different point of attachment.
Portable: Nomadic access is provided to a portable device, such as a PC card, with
expectation of a best-effort handover.
Simple mobility: The subscriber may move at speeds up to 60 kmph with brief
interruptions (less than 1 sec) during handoff.
Full mobility: Up to 120 kmph mobility and seamless handoff (less than 50 ms
latency and < 1% packet loss) is supported.