IEEE 802.11ad

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Summary

IEEE 802.11ad protocol has been developed for very high data rate (about 7 Gbps) at shorter distances (about 1-10 meters) at the frequency of 60GHz unlicense band. It is a next version of 802.11ac supporting upto 1.3 Gbps(wave1) 6.9 Gbps(wave2 with 8x8MIMO with 160 MHz channel bandwidth) in data rate at 5 GHz band. This standard is also known as WiGig (Wireless Gigabit).

Milestones

2007

Wireless gigabit aliiance formed (citation needed)

2009

WiGig 1.0 announced (citation needed)

2010

WiGig and WiFi alliance announced

2012

IEEE 802.11ad-2012 as amendment to overal IEEE 802.11

2013

Wireless Gigabit alliance merge with WiFi Alliance

Discussion

  • What are the typical use cases for 802.11ad?

    The 802.11ad protocol can be used for very high througput requirement such as networking backhaul, uncompressed transfer for monitor or project (e.g. virutal reality applications), upload/download docking etc..

  • What is frequency spectrum for 802.11ad?

    The WiGig supports 57 to 66 GHz frequency range and it is divided in four channels (Ch1=57.24 to 59.40 GHz, Ch2= 59.40 to 61.56 GHz, Ch3=61.56 to 63.72 GHz, Ch4=63.72 to 65.88 GH). These channels are supported in various region based on regularity. The channel 2 is available in all regions and is therefore used as the default channel. The bandwidth for all the channels is 2.1 6GHz wide.

  • What are some technical details or parameters of 802.11ad?

    The 802.11ad physical layer uses single carrier and OFDM.It does not support spatial mutiplexing such as MIMO, it selects active antenna based on gain and directionality out of multiple antennas. It also supports antenna beam forming and steering.

    The MAC layer augments standard IEEE802.11 MAC with new capabilities to support the directional operation and it is called as Directional multi-gigabit(DMG).

    The 802.11ad frame consists of three parts preamble, header and payload. The preamble is known data pattern which provides time estimation, AGC adjustment and channel estimation. The header contains information useful to decode the rest of the packet i.e. payload. The header carries modulation and coding scheme of the payload.

    Three modulation methods are supported 802.11ad:

    -Control modulation using MCS 0 (27.5 Mbps)

    -Single carrier modulation using MCS 1-12 (385to 4620 Mbps) and MCS 25-31 (693 to 6756.75 Mbps)

    -OFDM modulation using MCS 13-24 (625.6 Mbps to 2503 Mbps)

  • What are the design techniques that are making 802.11ad better?

    -802.11ad extensively uses Golay Complementary Sequences in preamble which helps in synchronization, AGC, Data spreading, channel estimation, gain/phase tracking and beamforming training.

    -Beamforming which helps in power optimization and reduce interference in real time

    -It uses high channel bandwidth 2.1 6GHz.

  • 802.11ad supported chipset?

    -Broadcom

    BCM20130 - 802.11ad SoC

    BCM20138 - 802.11ad RFIC

    -Qualcomm Atheros

    QCA9500 - 802.11ad chipset

    802.11ad 60GHz (4.6Gbps PHY)

    QCA6300 - 802.11ad chipset series (Wilocity Wil6300)

    QCA6310 (60GHz RF transceiver)

    QCA6320 (60GHz MAC/BB)

    QCA6335 (60GHz MAC/BB) + QCA6310 (RFIC)

  • Commercially 802.11ad supported devices?

    -Netgear R9000 - Nighthawk X10 - AD7200 Smart WiFi Router

    Alpine AL-514 @1.7GHz Quad Core Processor

    Qualcomm Atheros QCA9984 + QCA9500 802.11ad chipset

    -Acelink BR-6774AD - AD7200 WLAN Concurrent Tri-Band Gigabit Router

    CPU: Qualcomm IPQ8065 @1.7GHz Dual Core Internet Processor

    WLAN: Qualcomm Atheros QCA9984 (2.4GHz) + QCA9984 (5GHz) + QCA6320 (60GHz MAC/BB) + QCA6310

    (60GHz RF transceiver)

    -TP-LINK AD7200 (Talon) - AD7200 Multi-band Wi-Fi Router

    Up to 4600Mbps (60GHz), 1733Mbps (5GHz) and 800Mbps (2.4GHz)

    -AC2600 4x4 Qualcomm MU-MIMO with single-stream 802.11ad radio

    Qualcomm @1.4GHz Dual Core Internet Processor, 2x USB 3.0 ports

    Qualcomm IPQ8064 combined with QCA9500 802.11ad chipset

  • How is 802.11ad related to Wireless USB?

    Wireless USB is a short-range, high-bandwidth wireless radio communication protocol created by the Wireless USB Promoter Group. Currently Wireless USB in 2.4GHz and 5GHz bands uses 802.11n and 802.11ac Wi-Fi protocols to transfer high-spead data for short distance.

    The Wi-Fi Alliance is working a spec known as the "WiGig Serial Extension Specification" to USB-IF(USB Implementers Forum), which will use it as the foundation of MA USB(Media Agnostic USB). It is expected that WiGig Certified and Wi-Fi Certified products will implement USB functionality to send data up to 7Gbps over the 60GHz band.

    At the same, 802.11ad also has challanges w.r.t line of sight and mobility operations.

Milestones

2007

Wireless gigabit aliiance formed (citation needed)

2009

WiGig 1.0 announced (citation needed)

2010

WiGig and WiFi alliance announced

2012

IEEE 802.11ad-2012 as amendment to overal IEEE 802.11

2013

Wireless Gigabit alliance merge with WiFi Alliance

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Last update: 2018-03-08 17:25:10 by arvindpdmn
Creation: 2018-03-04 06:00:08 by arvindpdmn

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Cite As

Devopedia. 2018. "IEEE 802.11ad." Version 10, March 8. Accessed 2018-06-18. https://devopedia.org/ieee-802-11ad
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