Disclosed is a method of controlling a receiver. A group identifier or modulation and coding scheme is sent in a physical layer header. This group identifier or modulation and coding scheme, or both, determine whether the corresponding physical layer frame should be fully demodulated and decoded. If it is not necessary to fully demodulate and decode the physical layer frame, the receiver may disable its demodulator, decoder, or both. This results in a power savings. A hub device sends the group identifier or modulation and coding scheme in the physical layer header. This allows receivers that are not addressed by the group identifier, or modulation and coding scheme, to disable at least a portion of their circuitry. Disabling at least a portion of circuitry saves power consumption and dissipation. The hub device may also send control messages to tell the receiver which group identifiers, or modulation and coding schemes, they should respond to.