User's Manual

Appendix
BreezeNET PRO.11 Series 8-32 User’s Guide
8.5.10.2 PLCP Header
The PLCP Header is always transmitted at 1 Mbit/s and contains Logical
information used by the PHY Layer to decode the frame. It consists of:
• PLCP_PDU Length Word: which represents the number of bytes con-
tained in the packet. This is useful for the PHY to correctly detect the
end of packet.
• PLCP Signaling Field: which currently contains only the rate informa-
tion, encoded in 0.5 Mbps increments from 1 Mbit/s to 4.5 Mbit/s.
• Header Error Check Field: Which is a 16 Bit CRC error detection
field.
8.5.10.3 MAC Data
The following figure shows the general MAC Frame Format. Part of the
fields are only present in part of the frames as described later.
Figure 9.18: MAC Frame Format
Frame Control Field
The Frame Control field contains the following information:
Figure 9.19: Frame Control Field