802.11v Physical Rates ========================= .. 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 **Does 802.11v define new physical rates?** No, 802.11v does not define new PHY rates—it operates on top of existing PHY standards. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Which PHY layers can be used with 802.11v?** 802.11v can work with any 802.11 PHY layer, including 802.11a/b/g/n/ac/ax. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does 802.11v affect physical rate selection?** It does not directly control PHY rate selection but enables better decisions through context-aware management. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is rate adaptation used with 802.11v?** Yes, standard PHY-layer rate adaptation continues to operate with 802.11v enhancements. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can 802.11v help optimize PHY rate usage?** Indirectly, yes—by improving station mobility and load balancing, better rates can be maintained. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11v influence PHY capabilities reporting?** No, PHY capabilities reporting is handled by base 802.11 standards, not 802.11v specifically. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11v change modulation or coding schemes?** No, it uses whatever schemes the underlying PHY supports. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How is throughput affected by 802.11v?** 802.11v may improve throughput by helping clients associate with better APs, leading to higher PHY rates. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What physical rates are commonly used with 802.11v?** Rates depend on the PHY—e.g., up to 600 Mbps with 802.11n, 6.9 Gbps with 802.11ax. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can low-rate clients still benefit from 802.11v?** Yes, 802.11v benefits all clients by improving mobility and resource use, regardless of their rate. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is PHY rate management centralized in 802.11v?** No, rate management is still performed by the station and AP based on link conditions. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can 802.11v improve link quality?** Indirectly, yes—by helping stations transition to better APs with stronger signals and higher rates. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11v impact channel bandwidth use?** No, channel bandwidth usage (e.g., 20/40/80/160 MHz) remains a function of the PHY and network setup. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Are PHY changes needed to support 802.11v?** No changes are required; 802.11v is a MAC layer enhancement only. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Do APs need to support high PHY rates for 802.11v to work well?** Higher PHY rates help maximize the benefits of 802.11v, but basic support is sufficient for functionality. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can PHY rate be a metric in BSS transition decision-making?** Yes, 802.11v can use link quality and PHY metrics to recommend better APs. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does 802.11v affect clients with poor PHY support?** It can still assist them by guiding connections to APs with better coverage or lower contention. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is PHY rate information shared in 802.11v messages?** Not directly, but other metrics used in 802.11v may reflect PHY performance (e.g., RSSI, link quality). .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What’s the overall impact of 802.11v on PHY rate efficiency?** It helps keep clients on optimal connections, maintaining higher average PHY rates across the network. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How is PHY rate stability influenced by 802.11v?** More stable connections result from better AP selection and reduced re-associations. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow Topics in this section, * :ref:`physical_rates in 802.11r ` * :ref:`Reference links ` .. _physical_rates_v_step4: .. tab-set:: .. tab-item:: physical_rates in 802.11v =========== === ==== =========== ============ =========== ================ ========= ============ =========== ========== ======= Modulation BW Tsc FSP=BW/Tsc Tdata=1/FSP GI=Tdata/4 Symbol=Tdata+GI 1/Symbol Bits/Symbol Code rate Usable sc Rate (Mbps) =========== === ==== =========== ============ =========== ================ ========= ============ =========== ========== ======= BPSK 5 64 78.125 12.8 3.2 16 0.0625 1 1/2 48 1.5 BPSK 5 64 78.125 12.8 3.2 16 0.0625 1 3/4 48 2.25 QPSK 5 64 78.125 12.8 3.2 16 0.0625 2 1/2 48 3 QPSK 5 64 78.125 12.8 3.2 16 0.0625 2 3/4 48 4.5 16-QAM 5 64 78.125 12.8 3.2 16 0.0625 4 1/2 48 6 16-QAM 5 64 78.125 12.8 3.2 16 0.0625 4 3/4 48 9 64-QAM 5 64 78.125 12.8 3.2 16 0.0625 6 2/3 48 12 64-QAM 5 64 78.125 12.8 3.2 16 0.0625 6 3/4 48 13.5 256-QAM 5 64 78.125 12.8 3.2 16 0.0625 8 3/4 48 18 256-QAM 5 64 78.125 12.8 3.2 16 0.0625 8 5/6 48 20 BPSK 10 64 156.25 6.4 1.6 8 0.125 1 1/2 48 3 BPSK 10 64 156.25 6.4 1.6 8 0.125 1 3/4 48 4.5 QPSK 10 64 156.25 6.4 1.6 8 0.125 2 1/2 48 6 QPSK 10 64 156.25 6.4 1.6 8 0.125 2 3/4 48 9 16-QAM 10 64 156.25 6.4 1.6 8 0.125 4 1/2 48 12 16-QAM 10 64 156.25 6.4 1.6 8 0.125 4 3/4 48 18 64-QAM 10 64 156.25 6.4 1.6 8 0.125 6 2/3 48 24 64-QAM 10 64 156.25 6.4 1.6 8 0.125 6 3/4 48 27 256-QAM 10 64 156.25 6.4 1.6 8 0.125 8 3/4 48 36 256-QAM 10 64 156.25 6.4 1.6 8 0.125 8 5/6 48 40 BPSK 20 64 312.5 3.2 0.8 4 0.25 1 1/2 48 6 BPSK 20 64 312.5 3.2 0.8 4 0.25 1 3/4 48 9 QPSK 20 64 312.5 3.2 0.8 4 0.25 2 1/2 48 12 QPSK 20 64 312.5 3.2 0.8 4 0.25 2 3/4 48 18 16-QAM 20 64 312.5 3.2 0.8 4 0.25 4 1/2 48 24 16-QAM 20 64 312.5 3.2 0.8 4 0.25 4 3/4 48 36 64-QAM 20 64 312.5 3.2 0.8 4 0.25 6 2/3 48 48 64-QAM 20 64 312.5 3.2 0.8 4 0.25 6 3/4 48 54 256-QAM 20 64 312.5 3.2 0.8 4 0.25 8 3/4 48 72 256-QAM 20 64 312.5 3.2 0.8 4 0.25 8 5/6 48 80 =========== === ==== =========== ============ =========== ================ ========= ============ =========== ========== ======= .. _physical_rates_v_step17: .. tab-set:: .. tab-item:: Reference links * Reference links