802.11aq MAC Timings ======================= .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What are MAC timings in IEEE 802.11?** MAC timings refer to the time intervals and delays defined at the MAC layer for coordinating wireless communication. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Why are MAC timing parameters important?** They ensure fair medium access, collision avoidance, and synchronization between devices for reliable communication. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the Distributed Interframe Space (DIFS)?** DIFS is a waiting period after a medium becomes idle before a station can transmit a new data frame. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does Short Interframe Space (SIFS) differ from DIFS?** SIFS is shorter and used between related frames like data and acknowledgment to prioritize quick responses. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the role of Arbitration Interframe Space (AIFS) in 802.11e/aq?** AIFS replaces DIFS for different traffic categories to enable Quality of Service by assigning varied waiting times. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the purpose of Slot Time in MAC timing?** Slot time is the basic unit for contention window backoff and collision avoidance during medium access. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How is Contention Window (CW) related to MAC timings?** CW defines the range of random backoff slots a device waits before attempting transmission to avoid collisions. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the Backoff Time in MAC protocols?** Backoff Time is a randomized waiting period within the Contention Window to reduce the chance of simultaneous transmissions. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does MAC timing affect collision avoidance?** Proper timing intervals and randomized backoffs reduce the probability of two devices transmitting simultaneously. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What timing parameters are used between RTS and CTS frames?** The SIFS interval is used to prioritize the CTS response right after the RTS is received. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does MAC timing impact power saving?** Timings govern when stations wake up or sleep, coordinating with beacon intervals to optimize battery use. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the Role of Beacon Interval in MAC timing?** It defines how often access points send beacon frames to synchronize and manage client communication. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does Timing Synchronization Function (TSF) relate to MAC timings?** TSF synchronizes all stations' clocks in a WLAN to ensure coordinated access and frame timing. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the impact of interframe spaces on Quality of Service (QoS)?** Differentiated interframe spaces (like AIFS) enable prioritization of time-sensitive traffic in 802.11e/aq. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How are timing parameters adjusted in high traffic conditions?** Contention windows may increase to reduce collisions by extending backoff times during congestion. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does MAC timing vary between 2.4 GHz and 5 GHz bands?** Yes, parameters like slot time and SIFS can differ due to propagation characteristics and regulatory requirements. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does MAC timing influence roaming performance?** Efficient timing coordination helps reduce handoff delays and ensures smooth transitions between APs. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is Extended Interframe Space (EIFS)?** EIFS is a longer wait time used after detecting erroneous frames to allow the network to recover. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How are MAC timings standardized across devices?** IEEE 802.11 defines strict timing parameters to ensure interoperability and synchronized medium access. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow Topics in this section, * :ref:`Learnings in this section ` * :ref:`Terminology ` * :ref:`Version Info ` * :ref:`mac_timings Basic Setup on Ubuntu using IPv4 ` * :ref:`Reference links ` .. _mac_timings_step1: .. tab-set:: .. tab-item:: Learnings in this section * In this section, you are going to learn .. _mac_timings_step2: .. tab-set:: .. tab-item:: Terminology * Terminology .. _mac_timings_step3: .. tab-set:: .. tab-item:: Version Info * Version Info .. _mac_timings_step18: .. tab-set:: .. tab-item:: mac_timings Basic Setup on Ubuntu using IPv4 * setup .. _mac_timings_step17: .. tab-set:: .. tab-item:: Reference links * Reference links