Answer made from the information below.
I coined "największa wspólna gęstość" for GCD. I welcome other suggestions.

ccccccccccccccccccccccccccccccccccccccc
MoCA Multimedia Over Coax Alliance

ABSTRACT | The Multimedia over Coax Alliance (MoCA)
publishes a home networking specification that is the deployed
standard for the majority of service providers in North America.
It is also being adopted in other parts of the world. MoCA
enables highly robust, secure, and low-latency communication
at net throughputs of over 400 Mb/s on the home coaxial
cable. Its primary use is for the distribution of premium content
video, including applications such as multiroom DVR. This
paper presents a historical, market, and technical overview of
MoCA.
-------------
In addition to unicast PHY profiles between node pairs,
MoCA nodes also create a broadcast PHY profile between
each node and all the other nodes in the network. The
broadcast PHY profile is used to transmit broadcast and
multicast data. This profile is constructed from the greatest
common density (GCD) of the individual subcarrier
constellations (see Fig. 9) and allows all nodes to ‘‘hear’’
the transmitting node.

cccccccccccccccccccccccccccccccccccccc

In running state, power consumption of transmission/receiving (“TX/RX”) depends on the actual data transmissions

http://www.freepatentsonline.com/y2010/0031297.html
http://www.entropic.com/sites/all/themes/entropic/files/MoCA...

cccccccccccccccccccccccccccccccccccccccccccccccccccc

Also known as MoCA PHY Rate. The
total RF power of a given node MoCA frequency
1150 MHz transmit power in dBm.