
58 ◾ IP Communications and Services for NGN
4. e SS then registers with the base station by sending a request message to
the base station. In the reply from the base station, the SS is assigned a con-
nection ID for a secondary management connection.
5. e SS and BS then create transport connection using a MAC_create_con-
nection request. A request to create a dynamic transport connection carries
information on whether an encryption is required at the MAC level.
Security Architecture
WiMAX security is implemented as a privacy sublayer at the bottom of its MAC
protocol’s internal layer [4] with the main goal of providing access security and ...