DLC Functions

The basic HiperLAN/2 DLC functions specified in [3] are for the purpose of transporting data and control information between HiperLAN/2 devices. These functions can be divided into two functional entities: Medium Access Control (MAC) and Error Control (EC). Their locations in the HiperLAN/2 protocol stack as well as relations to other functionalities are illustrated in Figure 7.3.

The EC is responsible for detection of and recovery from transmission errors on the radio link. Moreover, it ensures in-sequence delivery of data packets. The role of the MAC layer is to format information from higher layers into valid transmission packets to be delivered for the PHY layer for transmission, and vice versa.