802.11aj - Basics ========================== .. 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 is IEEE 802.11aj?** 802.11aj is an IEEE Wi-Fi amendment designed to enhance 802.11ad for operation in the 45 GHz and 60 GHz bands, especially for regulatory domains like China. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **When was 802.11aj ratified?** IEEE 802.11aj was officially ratified in 2018. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Which frequency bands does 802.11aj support?** 802.11aj supports both the 45 GHz and 59–64 GHz bands. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is 802.11aj backward compatible with 802.11ad?** Yes, 802.11aj maintains backward compatibility with 802.11ad for 60 GHz operations. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the primary use case for 802.11aj?** It is mainly intended for high-speed short-range wireless communication in regions like China that regulate different mmWave bands. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What modulation schemes are supported in 802.11aj?** Similar to 802.11ad, 802.11aj supports modulation from π/2-BPSK up to 64-QAM. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11aj use beamforming?** Yes, beamforming and sector-level sweep techniques are used for directional transmission. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What PHY types are used in 802.11aj?** 802.11aj continues to use Single Carrier PHY and OFDM PHY, with enhancements for 45 GHz. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the typical data rate for 802.11aj?** It supports rates comparable to 802.11ad, up to 6.75 Gbps. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11aj use the same channel bandwidth as 802.11ad?** Yes, it uses 2.16 GHz channel bandwidth for high throughput. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Why was 802.11aj introduced?** It was developed to support WiGig-like operation in the 45 GHz band, primarily for China, while ensuring compatibility with existing 802.11ad devices. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is 802.11aj part of WiGig?** Yes, it can be considered part of the broader WiGig family due to its high-speed mmWave operation. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11aj work globally?** No, it is mainly targeted at specific regional regulatory domains such as China. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can 802.11aj be used for VR and AR?** Yes, its high-speed short-range capabilities make it suitable for VR/AR streaming and similar applications. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What enhancements are made over 802.11ad in 802.11aj?** Enhancements include PHY/MAC changes for 45 GHz support, modified preambles, and regulatory compliance features. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What are the typical applications of 802.11aj?** High-throughput wireless docking, media streaming, fast file transfers, and in-room cable replacement. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11aj support fast session transfer?** Yes, similar to 802.11ad, it can support fast session transfer between bands for seamless user experience. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the beam training method used in 802.11aj?** It uses sector-level sweeps and beam refinement similar to 802.11ad. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is 802.11aj suitable for outdoor use?** No, it is primarily designed for **indoor short-range** use due to high-frequency attenuation. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Are there dedicated hardware devices for 802.11aj?** Yes, some Wi-Fi chipsets are designed specifically for China’s 45 GHz operation with 802.11aj compliance. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow Topics in this section, * :ref:`Learnings in this section <802_11aj_step1>` * :ref:`Terminology <802_11aj_step2>` * :ref:`Version Info <802_11aj_step3>` * :ref:`802_11aj Version&IEEE Details <802_11aj_step4>` * :ref:`802_11aj Basic Setup on Ubuntu using IPv4 <802_11aj_step5>` * :ref:`802_11aj Basic Setup on Ubuntu using IPv6 <802_11aj_step6>` * :ref:`Reference links <802_11aj_step16>` .. _802_11aj_step1: .. tab-set:: .. tab-item:: Learnings in this section * In this section, you are going to learn .. _802_11aj_step2: .. tab-set:: .. tab-item:: Terminology * Terminology .. _802_11aj_step3: .. tab-set:: .. tab-item:: Version Info * Version Info .. _802_11aj_step4: .. tab-set:: .. tab-item:: 802.11aj Version&RFC Details * rfc details .. _802_11aj_step5: .. tab-set:: .. tab-item:: 802.11aj Basic Setup on Ubuntu using IPv4 * setup .. _802_11aj_step6: .. tab-set:: .. tab-item:: 802.11aj Basic Setup on Ubuntu using IPv6 * setup .. _802_11aj_step16: .. tab-set:: .. tab-item:: Reference links * Reference links