MAC Protocols that use directional Antennas

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Presentation transcript:

MAC Protocols that use directional Antennas MAC protocols that use directional antennas have several advantages: Reduce signal interference Increase in the system throughput Improved channel reuse MAC protocol using directional antennas Make use of an RTS/CTS exchange mechanism Use directional antennas for transmitting and receiving data packets Directional Busy Tone-based MAC Protocol (DBTMA) It uses directional antennas for transmitting the RTS, CTS, data frames, and the busy tones. Directional MAC Protocols for Ad Hoc Wireless Networks DMAC-1, a directional antenna is used for transmitting RTS packets and omni-directional antenna for CTS packets. DMAC-1, both directional RTS and omni-directional RTS transmission are used.

Other MAC Protocols Multi-channel MAC Protocol (MMAC) Multiple channels for data transmission There is no dedicated control channel. Based on channel usage channels can be classified into three types: high preference channel (HIGH), medium preference channel (MID), low preference channel (LOW) Multi-channel CSMA MAC Protocol (MCSMA) The available bandwidth is divided into several channels Power Control MAC Protocol (PCM) for Ad Hoc Networks Allows nodes to vary their transmission power levels on a per-packet basis Receiver-based Autorate Protocol (RBAR) Use a rate adaptation approach Interleaved Carrier-Sense Multiple Access Protocol (ICSMA) The available bandwidth is split into tow equal channels The handshaking process is interleaved between the two channels.