List of PPDUs Supported in 802.11k
What is a PPDU in 802.11k?
The Physical Protocol Data Unit (PPDU) is the format of the data transmitted over the wireless medium in 802.11k networks.
How does 802.11k use PPDU?
802.11k uses the PPDU structure defined by the base 802.11 standards with additional information elements for radio measurements.
Does 802.11k define a new PPDU format?
No, 802.11k inherits the PPDU format from existing 802.11 standards (a/b/g/n) but includes measurement frames within MAC payloads.
What types of frames are carried inside PPDU in 802.11k?
Data frames, management frames, and special Radio Measurement frames are carried inside the PPDU.
What is the role of the PPDU preamble in 802.11k?
The preamble provides synchronization and signaling information for the receiver before the main data payload.
How does 802.11k ensure reliable transmission in PPDU?
It uses modulation, coding schemes, and retransmission mechanisms inherited from base 802.11 standards.
Are there any special PPDU fields for 802.11k Radio Measurements?
No special PPDU fields, but measurement reports are carried inside MAC layer frames within the PPDU.
What modulation schemes are used in 802.11k PPDUs?
Modulation schemes (e.g., BPSK, QPSK, QAM) depend on the underlying PHY standard used by the 802.11k device.
What frequency bands do 802.11k PPDUs operate on?
802.11k operates on 2.4 GHz and 5 GHz bands, using PPDUs defined by the corresponding PHY layers.
How are QoS features handled in 802.11k PPDUs?
QoS is managed by the MAC layer and reflected in the PPDU payload, using mechanisms such as EDCA.
What is the maximum PPDU length in 802.11k?
The maximum PPDU length follows limits set by the underlying 802.11 PHY standard (typically up to 4 ms transmission time).
Can 802.11k measurement frames be aggregated in one PPDU?
Yes, frame aggregation techniques like A-MPDU and A-MSDU can be used to send multiple measurement frames efficiently.
Does 802.11k affect the timing of PPDU transmission?
No, PPDU timing is controlled by the base PHY/MAC standards; 802.11k adds measurement content but not timing changes.
What is the typical PPDU data rate used in 802.11k?
Data rates vary widely depending on PHY capabilities, environment, and modulation used.
How does 802.11k handle error control in PPDU?
Error detection and correction are handled by PHY layer coding and MAC layer acknowledgments.
Are measurement requests sent within the PPDU?
Yes, measurement request frames are sent inside the PPDU payload at the MAC layer.
How are measurement reports delivered in 802.11k?
Reports are encapsulated inside MAC frames transmitted within PPDUs.
Does 802.11k modify PPDU header fields?
No, PPDU header fields remain as specified by the underlying PHY standard.
Can 802.11k PPDUs coexist with legacy 802.11 devices?
Yes, 802.11k uses standard PPDU formats ensuring backward compatibility.
What is the relationship between PPDU and MAC frames in 802.11k?
PPDU carries MAC frames including measurement requests and reports, enabling radio resource management.
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