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Multiple Access with Collision Avoidance for Wireless
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<p>Multiple Access with Collision Avoidance for Wireless (MACAW) is a slotted <a href="/facts/Medium_access_control/hFpNzFFD">medium access control</a> (MAC) protocol widely used in <a href="/facts/Ad_hoc_network/naV7XARn">ad hoc networks</a>. Furthermore, it is the foundation of many other MAC protocols used in <a href="/facts/Wireless_sensor_networks/r5LIAVsU">wireless sensor networks</a> (WSN). The <a href="/facts/IEEE_802.11_RTS/CTS/7qLlWYw3">IEEE 802.11 RTS/CTS</a> mechanism is adopted from this protocol. It uses <i>RTS-CTS-DS-DATA-ACK</i> frame sequence for transferring data, sometimes preceded by an <i>RTS-RRTS</i> frame sequence, in view to provide solution to the <a href="/facts/Hidden_node_problem/Ry5LH3N2">hidden node problem</a>. Although protocols based on MACAW, such as <a href="/facts/S-MAC/JuKeyxuV">S-MAC</a>, use <a href="/facts/Carrier_sense/uUMMF4ex">carrier sense</a> in addition to the RTS/CTS mechanism, MACAW does not make use of carrier sense. </p>