Packet Error Rate. Like the bit error rate, but measured as a fraction of packets with errors.
Common IEEE abbreviation for the physical layer.
physical-layer convergence procedure
The upper component of the PHY in 802.11 networks. Each PHY has its own PLCP, which provides auxiliary framing to the MAC.
PCF Inter-Frame space. During contention-free service, any station is free to transmit if the medium is idle for the duration of one PCF inter-frame space.
See physical-layer convergence procedure.
Physical Medium Dependent. The lower component of the MAC, responsible for transmitting RF signals to other 802.11 stations.
PLCP Protocol Data Unit. The complete PLCP frame, including PLCP headers, MAC headers, the MAC data field, and the MAC and PLCP trailers.
protocol data unit
Layers communicate with each other using protocol data units. For example, the IP protocol data unit is the familiar IP packet. IP implementations communicate with each other using IP packets. See also service data unit.
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