HIPERLAN 1 MAC Layer
n Compatible to ISO MAC
n Supports time-bounded services via a priority scheme
n Packet forwarding
support of directed (point-to-point) forwarding and broadcast
forwarding (if no path information is available)
support of QoS while forwarding
n Encryption mechanisms
mechanisms integrated, but without key management
n Power conservation mechanisms
mobile terminals can agree upon awake patterns (e.g., periodic
wake-ups to  receive data)
additionally, some nodes in the networks must be able to buffer
data for sleeping terminals and to forward them at the right time
(so called stores)