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3 - The MAC Layer of PLC

from Part I - How Does PLC Work?

Published online by Cambridge University Press:  05 May 2022

Christina Vlachou  and
Sébastien Henri
Christina Vlachou
Affiliation:
Hewlett-Packard Laboratories
Sébastien Henri
Affiliation:
EPFL
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Summary

We discusse PLC efficiency when multiple users contend for the medium. To resolve contention conflicts, PLC uses carrier sense multi- ple access with collision avoidance (CSMA/CA) on the MAC layer. The stations have to sense the medium before they transmit, and to wait for a random interval of idle-medium time slots before they transmit. The PLC CSMA/CA protocol is similar but more complex than that of Wi-Fi. We present the IEEE 1901 CSMA/CA protocol and certain MAC-layer processes, such as the priority resolution for QoS classes, inter-frame spaces, and frame aggregation. We discuss the new features of HomePlug AV2 compared to IEEE 1901 and the differences between Wi-Fi and PLC MAC layers.

Keywords

CSMA/CAPLCWi-FiTDMAbeaconnetwork managementcentral coordinatorinter-frame spacesdelimiterframe aggregation
Type
Chapter
Information
A Practical Guide to Power Line Communications , pp. 50 - 77
Publisher: Cambridge University Press
Print publication year: 2022

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