Efficient MAC Protocol for Heterogeneous Cellular Networks ( HC - MAC )

This papers details the efficient MAC protocol for heterogeneous Cellular network. Present 3G-cellular radio access network cannot support many concurrent high data rate unicast (or) flows due to limited radio resources. We proposed Mac protocol for heterogeneous cellular network (HC-MAC). The heterogeneous network uses a proprietary protocol for communication within the network and TCP/IP for connection with other networks. Here we study here how the 802.11 medium access control (MAC) protocol can be applied and how it performs in the Heterogeneous cellular network (HC-MAC). By exploiting the fact that timeout intervals are not explicitly specified, without modifying the standard, we propose a new timing structure for the distribution coordination function (DCF) and the handshake of request-to-send (RTS) and clear-to-send (CTS) to handle increased signal propagation delay in Heterogeneous cellular network (HC-MAC) . We find that the DCF and RTS/CTS protocols as specified in the standard continue to work properly for a link distance up to 6 km. Our analysis reveals that the DCF performance degrades slightly in the 802.11 network with cell size of 6 km when compared with the 600 m WLAN. Thus, as far as the MAC protocol is concerned, the Heterogeneous cellular network (HCMAC), with 8 km cell size is feasible.