Regarding HDTV support, HomePlug AV enables a broadband-strength network connection via electrical wiring for high-demand applications such as streaming movies or online gaming. Since the introduction of the HomePlug AV gaming standard back in 2006, its purpose has been to provide high-quality, multistream, entertainment-oriented networking over existing AC wiring within the home. HomePlug AV employs advanced PHY and Medium Access Control (MAC) technologies that provide a 200 Mbps class power line network for video, audio, and data.
The MAC layer is designed to be highly gaming efficient, supporting both Time Division Multiple Access (TDMA) and Collision Sense Multiple Access (CSMA)-based access with AC line cyclesynchronization. The TDMA provides quality of service assurances including guaranteed bandwidth reservation, high reliability, and tight latency and jitter control. The CSMA provides four priority levels. AC line cycle synchronization provides superior channel adaptation in the face of common line cycle synchronized noise. The central gaming coordinator controls network activities, allocating time for CSMA use and scheduling TDMA use.
refer to:http://industrial-embedded.com/articles/plug-and-play-homeplug-homeplug-powerline-alliance/
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