Mac Sublayer Specification

MAC Sublayer Specification :
Tha MAC sublayer is responsible for the following tasks :
– Generating network beacons if the device as a coordinator.
– Synchronizing to the beacons.
– Supporting PAN association and disassociation.
– Supporting device security
– Employing the CSMA/CA mechanism for channel access
– Handling and maintaining the GTS mechanism.
– Providing a reliable link between two peer MAC entities.

The MAC sublayer provides an interface between the SCC and the PHY. The MAC sublayer conceptually includes a management entity called the MLME (MAC sublayer management entity). This entity provides the service interface
through which layer management functions may be invoked. The MLME is also responsible for maintaining a database of
managed objects pertaining to the MAC sublayer. This database is referred to as the MAC sublayer PIB.
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MAC sublayer provides two serviced, accessed through toe SAPs (service access point) :
– The MAC data service, accessed through the MAC common part sublayer (MCPS) data SAP (MCPS-SAP).
– The MAC management service, accessed through the MLME-SAP.

Reference :
IEEE Standard for Information technology, Specifications for WPANs 802.15.4

Darkness in the Jungle,

January 26 2008 – Winter Vacation,
Taipei City
High Speed Network Lab

Udin Harun

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