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RF Basic Background: 802.11ac Wave1 and Wave2

03/26/2020 902 People found this article helpful 210,230 Views

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    Description

    RF Basic Background: 802.11ac Wave1 and Wave2

    Resolution

     

    802.11ac is the fifth generation protocol of Wifi family. 802.11ac is subdivided into two waves, Wave 1 (available now) and Wave 2 (available by the end of 2015). The first wave of 802.11ac can deliver up to 433 Mbps (low end), 867 Mbps (mid-tier), or 1300 Mbps (high end) at the physical layer. The second wave of 802.11ac can provide up to 3.47 Gbps.

    Note: SonicPoint appliances ACi/ACe are Wave 1 products. SonicWave products are Wave 2.

    802.11ac Wave 1 and Wave 2

    Parameter 802.11ac Wave 1 802.11ac Wave2
    Spectrum 5 GHz
    Bandwidth Mandatory: 20, 40, and 80 MHz Mandatory: 20, 40, and 80 MHz
    Optional: 160 adn 80+80 MHz
    Modulation Mandatory: BPSK, QPSK, 16QAM
    Optional: 256QAM
    Spatial Streams Optional: Up to 3 Optional:Up to 4
    Short guard interval Optional
    Beamforming (Sounding) Optional
    Aggregation Madatory: TX and RX of A-MPDU
    Optional: RX A-MPDU of A-MSDU
    MU-MIMO - Optional

    Multi-User MIMO (MU-MIMO) to enable transmission of more streams to several users simultaneously. New feature allows an AP to transmit different streams to several targeted clients simultaneously.

    Beamforming (Sounding): this feature enables the beamformer to precisely steer its transmitted energy and path toward the receiver.

    Note: Wave 1 solves most problems today, it is capable to achieve the speeds of TCP to most single 3 stream and signle stream (smartphone) clients. For Wave 1 of 802.11ac, you don't have to upgrade your current network. While, with future Wave 2 speeds (more than 2 Gbps),  the uplink will require upgrading to use multiple GigE ports or even 10GigE ports.

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