Zigbee Physical layer frame format-PPDU

This page on zigbee PHYSICAL layer(PHY) frame describes PHY frame format. It covers preamble,SFD,frame length,PSDU field descriptions.

As shown in the figure for generic packet format, PPDU consists of preamble,SFD,frame length and PSDU. There are 32 zeros in the preamble field and used for synchronization.

Generic packet format

Octets:4 1 1 variable
Preamble SFD Frame length(7 bits) reserved(1 bit) PSDU
SHR PHR PHY payload

SFD field format

Bits:0 1 2 3 4 5 6 7
1 1 1 0 0 1 0 1

SFD field is a 8 bit field(1 octet). It is a delimiter between preamble and packet data. Both preamble and SFD combined referred as SHR. Frame length is part of PHR as shown. Variable length payload carries MAC sublayer information.

Frame length format

Frame length values Payload
0-4 Reserved
6-7 Reserved
8 to aMaxPHYPacketSize MPDU

Frame length as mentioned is a 7 bits in length and signifies total number of octets contained in PSDU or physical layer frame payload. PSDU carry Physical layer information. PSDU also carry mac sub layer information or MPDU when length of packet is 5 octets or greater.

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Frame structure of wireless standards, technologies

Frame structure of various wireless standards/technologies are mentioned below. It include WiMAX, WLAN, Zigbee, GSM, GPRS, UMTS, LTE, TD-SCDMA, GPS, SDH, 11ac WLAN, AMPS, Ethernet, VLAN etc.

WiMAX physical layer Frame Structure as per 802.16d and 802.16e standards
WiMAX MAC layer Frame Structure as per OFDM 802.16d standard
Zigbee RF4CE Frame Structure
Zigbee physical layer Frame Structure
Zigbee MAC layer Frame Structure
GPRS Frame Structure
GPS Frame Structure
LTE Frame Structure
TD-SCDMA Frame Structure
UMTS Frame Structure
SONET Frame Structure
SDH Frame Structure
802.11ac PHY Frame Structure
802.11ac MAC layer Frame Structure
WLAN Frame Structure as per 802.11a,11b,11n,11ac standards
AMPS Frame Structure
Ethernet Frame Structure
VLAN Frame Structure
GSM Frame Structure

Zigbee Useful Links

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Refer page on bluetooth versus zigbee which describes comparison between Bluetooth and Zigbee technologies.
Refer our page which describes about what zigbee does including its applications and provides useful references.