Wireless Access

 View Only

  • 1.  Wifi speed is very poor

    Posted Feb 16, 2025 08:37 AM

    Hi Sir, 

    Recently we are purchasing and implemented Aruba AP505 access points totally 70 numbers.  now is working all the device. but wifi speed is very poor. broadband connection speed is 900 mbps getting. but aruba ap505 speed is only 120 mbps. how do improve my wifi speed ?



  • 2.  RE: Wifi speed is very poor

    Posted Feb 16, 2025 10:35 AM

    There are plenty of things which you need to check:
    1. Did you check whether you have proper cabling installed (proper Cat5e, Cat6 cabling)?
    2. You need to check if you have enabled the correct Channel Bandwidth 40MHz & 80MHz?
    3. You need to check if your mobile device supports 802.11n/ac/ax standard?



    ------------------------------
    Shpat | ACEP | ACMP | ACCP | ACDP
    Just an Aruba enthusiast and contributor by cases
    If you find my comment helpful, KUDOS are appreciated.
    ------------------------------

    Original Message


  • 3.  RE: Wifi speed is very poor

    Posted Feb 17, 2025 06:55 AM

    Hi,

    agree on what shpat is stating.
    Wi-Fi is poor is not a message where we can investigate easily.
    additional to the raised questions:
    what version of code are you using?
    Is the "slowness" expereienced on 2.4 and 5 GHz?

    How are Clients connected and what´s their signal / speed?
    Are you experience "slowness" by dedicated Client types / SSID or general?
    How are APs installed (ceiling, wall, height)? 
    how many clients are connected to that AP, where "slowness" is experienced?



    Original Message


  • 4.  RE: Wifi speed is very poor

    Posted Feb 17, 2025 08:43 AM
    Edited by mkk Feb 17, 2025 08:46 AM

    The maximum speed of a Wi-Fi connection is determined by the achievable 802.11 modulation and depends on several factors, including:

    • Channel width
    • RSSI (Received Signal Strength Indicator)
    • Signal-to-Noise Ratio (SNR)
    • Selected data rate
    • Guard interval
    • Number of spatial streams supported by both the client and the access point

    Additionally, external factors such as interference and channel utilization can significantly impact actual performance.

    Realistic Wi-Fi Speeds

    The speed advertised on a Wi-Fi device's packaging represents the maximum 802.11 modulation rate. However, real-world download speeds are considerably lower due to:

    • Wi-Fi requiring a significant amount of management and control data in addition to actual payload (user data).
    • Retransmissions caused by interference and signal degradation, which are common and can reach 20%  under normal conditions.

    In an interference-free environment, you can expect the maximum download speed to be approximately 60% of the modulation rate.

    Using the MCS Table

    To determine achievable modulation and coding rates, you can refer to the MCS table (Modulation and Coding Scheme). This table provides insight into expected speeds based on:

    • The Wi-Fi standard in use (802.11n, 802.11ac, 802.11ax, etc.)
    • The channel width (20 MHz, 40 MHz, 80 MHz, etc.)
    • The number of spatial streams
    • Signal conditions (such as RSSI and SNR)

    For a detailed MCS table and an explanation of how to use it, visit:
    WLAN Professionals – MCS Table

    My AP-505 with Iphone 13Pro reach about aprox. 600Mbps downloadspeed with @80Mhz channels and strong RSSI values.
    ------------------------------
    Marcel Koedijk | MVP Expert 2024 | ACEP | ACMP | ACCP | ACDP | Ekahau ECSE | Not an HPE Employee | Opinions are my own
    ------------------------------

    Original Message


Related Content