White Paper Mobile WiMAX Technology for Fixed Broadband Deployments
Mobility:

Mobile WiMAX technology supports optimized handover
schemes with latencies less than 50 ms to help ensure
real-time applications such as Voice over Internet Protocol (VoIP)
are efficiently supported without service degradation. Flexible key
management schemes help assure security is maintained during
handover.
Mobile WiMAX does not Mandate Mobility
As stated earlier, Mobile WiMAX is equally applicable to fixed
as well as mobile environments. This is due to the fact that the
requirements for a fixed device are a subset of those for a mobile
device. The additional features enabling mobility naturally
extend WiMAX broadband wireless access from the fixed to the
mobile case.
Key Benefits of Mobile WiMAX
Improved Air Interface: The Mobile WiMAX air interface utilizes
Orthogonal Frequency Division Multiple Access (OFDMA) for improved
multipath performance in non-line-of-sight environments
and high flexibility in allocating resources to users with different
data rate requirements.