A third simple RDC layer is ''sicslowmac.c'' (''core/net/mac/sicslowmac.c''). This is a RDC layer with no energy savings and that uses IEEE 8021.5.4 frames.
 
A third simple RDC layer is ''sicslowmac.c'' (''core/net/mac/sicslowmac.c''). This is a RDC layer with no energy savings and that uses IEEE 8021.5.4 frames.
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The three last protocols available in ''ContikiOS'' are implementations of popular asynchronous MAC protocols that aim at energy saving; namely '''X-MA'''C, '''ContikiMac''' and '''LPP'''. X-MAC is a short-preamble protocol from 2006 that was ported to ContikiOS [1]. X-MAC has two different implementation in ContikiOS, which can be found in files ''core/net/mac/cxmac.c'' and ''core/net/mac/xmac.c''; the implementation in cxmac.c is a relaxed implementation that does not require stringent timing precision and work on larger number of platforms. ContikiMac [2] is a protocol that proposes enhancement over X-MAC. The implementation can be found in file ''core/net/mac/contikimac.c''. Finally, LPP (Low Power Probing) is a receiver-initiated low power protocol from 2008 that was also ported to ContikiOS [3]; the code can be found in ''core/net/mac/lpp.c''.
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The three last protocols available in ''ContikiOS'' are implementations of popular asynchronous MAC protocols that aim at energy saving; namely '''X-MA'''C, '''ContikiMac''' and '''LPP'''.  
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