A centralized ad-hoc network architecture (CANA) based on enhanced HiperLAN/2

In ad-hoc networks, where a user can enter, leave or move inside the network with no need for prior configuration, the support of multimedia applications that require very high bit-rates, is a challenging problem. Here, a centralized ad-hoc network architecture (CANA) is proposed, capable of efficiently supporting those applications in low mobility environments, while at the same time a standard wireless LAN environment is maintained for fast moving users. CANA is based on an enhanced HiperLAN/2 protocol architecture [ETR0230002 V0.2.0, 1999-04] [Johnsson, M., 1999], (even though this is not mandatory) that supports a dual mode of operation at 5 GHz and 60 GHz. In this system architecture, several ad-hoc specific functionalities are included, such as neighborhood discovery, clustering and routing. Among them, switching between different modes of operation has a large impact on the achievable performance of CANA.