List of PPDUs Supported in 802.11d
What is a PPDU in IEEE 802.11d?
PPDU stands for Physical Protocol Data Unit, the fundamental unit of transmission at the physical layer.
How does a PPDU relate to a MAC frame?
A MAC frame is encapsulated within a PPDU for transmission over the wireless medium.
Does 802.11d define new PPDU formats?
No, 802.11d primarily extends regulatory domain info; PPDU formats follow existing 802.11 standards.
What are the main components of a PPDU?
Typically includes a preamble, signal field, and the data payload.
What is the role of the preamble in a PPDU?
The preamble enables synchronization and channel estimation at the receiver.
How does 802.11d impact PPDU transmission power?
802.11d mandates regulatory domain compliance which affects transmit power during PPDU transmission.
Are there different PPDU types in 802.11 standards?
Yes, such as DSSS, OFDM, and ERP PPDUs, each used in different physical layer variants.
Does 802.11d modify PPDU timing or duration?
No direct modifications; PPDU timing adheres to physical layer specifications.
How does regulatory domain info affect channel selection for PPDU?
802.11d ensures PPDUs transmit only on allowed channels per the regulatory domain.
What modulation schemes are used in PPDU transmission?
Modulation varies by standard and can include BPSK, QPSK, QAM, etc.
Can PPDU formats differ between countries due to 802.11d?
PPDU formats remain consistent; however, transmit power and channels comply with local rules.
What is the significance of the signal field in a PPDU?
It conveys rate and length information to help the receiver decode the data.
Does 802.11d affect how retransmissions are handled at the PPDU level?
Retransmissions are managed by MAC and PHY layers, unaffected directly by 802.11d.
How does PPDU size impact network performance?
Larger PPDUs carry more data but may increase error probability and latency.
Are PPDUs encrypted or protected?
Encryption happens at MAC layer; PPDUs carry encrypted frames transparently.
How does 802.11d ensure coexistence with other devices?
By defining allowed channels and power, 802.11d minimizes interference during PPDU transmissions.
What is the relation between PPDU and throughput?
Efficient PPDU design and transmission optimize throughput within regulatory constraints.
Where can I learn more about PPDU structures in 802.11?
Refer to IEEE 802.11 standard documents and physical layer technical references.
Topics in this section,
Reference links