Power Saving Mechanisms in IEEE 802.11d protocol
What is IEEE 802.11d?
IEEE 802.11d is an amendment to 802.11 standards that adds support for operation in additional regulatory domains worldwide.
Does IEEE 802.11d define specific power saving mechanisms?
No, 802.11d focuses on regulatory domain information and relies on existing 802.11 power saving methods.
How does 802.11d impact power saving in devices?
By enforcing country-specific transmit power limits, 802.11d indirectly influences power consumption.
What is Power Save Mode (PSM) in 802.11 standards?
PSM allows devices to enter low-power sleep states and wake periodically to check for data.
Does 802.11d affect PSM operation?
Indirectly, since transmit power constraints may change wake/sleep timing or signal strength.
What role do beacon frames play in power saving?
Beacons carry information about buffered data, allowing clients to sleep and wake efficiently.
What is the Traffic Indication Map (TIM) in beacons?
TIM indicates which stations have pending unicast frames buffered at the access point.
What is the Delivery Traffic Indication Message (DTIM)?
DTIM signals multicast/broadcast traffic delivery times to sleeping clients.
How does 802.11d influence transmit power control (TPC)?
802.11d provides regulatory limits that TPC uses to adjust power for efficient energy use.
Can devices dynamically adapt power saving based on 802.11d info?
Yes, devices adjust power levels and channel use according to regional regulations, impacting power saving.
What happens when a device moves to a new regulatory domain under 802.11d?
The device updates transmit power and channel parameters, which can affect power consumption temporarily.
Does 802.11d affect battery life directly?
Not directly, but compliance with power limits can improve energy efficiency and prolong battery life.
How does 802.11d interact with Automatic Power Save Delivery (APSD)?
APSD operates independently but can benefit from power limits specified by 802.11d for efficient operation.
Are there challenges in implementing power saving across multiple regulatory domains?
Yes, varying power limits and channel restrictions require flexible device adaptation.
Can 802.11d regulatory info cause increased latency in power saving?
Potentially, when devices reconfigure for new regulations, causing temporary delays.
Does 802.11d define any mechanisms for managing power during channel switching?
No, channel management is handled by other 802.11 amendments; 802.11d provides the regulatory framework.
How do power saving and 802.11d relate in multi-band devices?
Devices adjust power saving settings per band based on 802.11d regulatory info for each region.
Is there a direct relation between 802.11d and device sleep scheduling?
No direct relation, but power constraints may influence sleep scheduling strategies.
Where can I find more detailed info on power saving and 802.11 standards?
Consult IEEE 802.11 specifications and related amendments like 802.11h (TPC) and 802.11e (QoS and power saving enhancements).
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