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  1. #16
    Thank you for your sharing. I want to add some useful info about Pharos MAXtream. Wish it could help Standard Features for Pharos CPE510, CPE520, CPE210, CPE220
    • 5GHz operating frequency ensures fewer disturbances and provides more available channels – CPE510, CPE520. 2GHz operating frequency for CPE210, CPE220
    • Wireless N speed up to 300Mbps
    • Selectable bandwidth of 5/10/20/40MHz
    • Adjustable transmission power from 0 to 27dBm/500mw
    • Built-in 2x2 dual-polarized directional MIMO antenna. 13dBi CPE510, 16dBi520, 9dBi CPE210, 12dBi CPE220
    • Weatherproof enclosure, 15kV ESD and 4KV lightning protection
    • Dual Ethernet ports and grounding terminal integrated
    • Passive PoE adapter with ESD protection circuitry and remote reset capability
    • PharOS Web-based operating system optimized for outdoor wireless applications
    • TP-LINK Pharos MAXtream TDMA technology improves product performance in throughput, capacity and latency, ideal for PTMP applications
    • Supports AP Router, AP Client Router, AP, AP Client, Multi-Bridge and Repeater Operation modes
    • Provides signal strength and client connection quality (CCQ) indicators for antenna alignment
    • Provides Throughput Monitor, Spectrum Analyzer, Speed Test and Ping tools
    • Supports discovery and management via Pharos Control application



  2. #17
    In PtP Links MaxStream is a killer for Bandwidth and Latency.

    I use AirMax on a PtP link:
    Antwort von 192.168.1.2: Bytes=32 Zeit=2ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=13ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=2ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=9ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=3ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=10ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=7ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=14ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=3ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=35ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=7ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=3ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=11ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63

    Without:
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=1ms TTL=63
    Antwort von 192.168.1.2: Bytes=32 Zeit=2ms TTL=63

    Throughput:
    With MaxStream on:
    RX:
    71.04Mbps


    TX:



    64.84Mbps



    Total:



    135.88Mbps


    MaxStream off:
    RX:

    82.63Mbps



    TX:



    91.80Mbps



    Total:



    174.42Mbps

    So i would use the normal wifi of my CPE210s without such extensions. Maybe in PTMP szenarios it would be different













  3. #18
    Members R1D2 is on a distinguished road
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    Since MAXtream (not MAXStream) is a TDMA technique, it reduces bandwidth/latency naturally. In PtP scenarios MAXtream is not useful at all (except probably for "security by obscurity" by avoiding standard CSMA/CA protocol), but in PtMP scenarios it can be a life safer, especially if repeating CPEs are used.

  4. #19
    Yeah in understand that ... but then it should be written in the description via the webinterface that MaxTream should be used in noisy enviroment or PTMP scenarios with more than a handful clients.
    I got another installation with 4 clients on one AP and tried it, and got the same results as on the PTP scenario, but maybe with 50 or 80 Clients it would be useful

  5. #20
    Members R1D2 is on a distinguished road
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    Quote Originally Posted by Snotmann View Post
    I got another installation with 4 clients on one AP and tried it, and got the same results as on the PTP scenario, but maybe with 50 or 80 Clients it would be useful
    TDMA will even improve the bandwidth for each AP with only 4 clients compared to CSMA/CA. Just try it and flood the main AP with full speed data from 4 clients simultaneously. With CSMA/CA there will be much more collisions compared to the situation where only one AP is sending data as it happens if you use the built-in speed test. Therefore, TDMA will not improve bandwidth if only one client is sending constantly, but it will do so if all 4 APs are sending more data than what fits into 1/4 time slice of AirTIme. First try it, then judge.

    What's more, TDMA avoids the hidden node problem if you use it in a link with a relaying station (not repeating station, but in AP <<<>>> client --- client <<<>>> AP setups). With CSMA/CA, bandwidth could drop significantly due to interference caused by hidden nodes.

    TDMA technique goes back as early as to the year 1865 and it is a well-proven technique, used heavily in today's mobile phone networks for example.

    And with 80 clients you will have a lot of other problems, so the question of TDMA vs. CSMA/CA would be the last to think of.
    Last edited by R1D2; 01-11-2018 at 18:00.


 

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