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10
the domain, including admission to the domain, bandwidth reservation, resignation, priorities and
other management operations.
At any given time, only one Powerline adapter is allowed to act as a DM for a domain. In case a
DM fails, the DM function is passed to another Powerline adapter in the domain.
Since all the Powerline adapters in the domain can communicate or directly interfere with each
other, the DM avoids interference between Powerline adapters by coordinating their transmission
time using Time Division Multiple Access (TDMA).
TDMA is a channel access multiplexing scheme that assigns a transmission time slot to each
Powerline adapter in the domain. It allows several Powerline adapters to share the same
frequencies between 2 to 80MHz by dividing the signal into different time slots. The Powerline
adapters transmit in rapid succession, one after the other, each using its own time slot. This allows
multiple Powerline adapters to share the same electrical power lines.
The DM
receives signals from all the Powerline adapters within the domain. Thus, any
Powerline adapter within the domain can communicate with another Powerline adapter only
through the DM. The DM further forwards the signals to the corresponding Powerline
addressee within the domain which in turn forwards the signals to the Wi-Fi or Ethernet
interfaces.
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