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Thread: Smart Preallocation vs Normal Preallocation -- Huawei LTE

  1. #1
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    Default Smart Preallocation vs Normal Preallocation -- Huawei LTE

    Dears,

    from the Hedex, we mention that, in terms of delay, Smart preallocation increase the web browsing start delay. I still don't see why !
    Normally UL Preallocation quickens reponses to UE service request so why this may increase the web browsing start delay ?
    Please to explain.

    from Hedex :

    "Smart preallocation is triggered by DL services and cannot be performed before UL TCP services start, such as web browsing. This results in increased service start delay. Throughput when smart preallocation is enabled is slightly less than that when normal preallocation is enabled."

    "Smart preallocation achieves a better tradeoff than normal preallocation among system gains, PDCCH overhead, and UL interference. When a small TCP window is configured on the server, the DL web browsing rate is sensitive to the UL loopback TCP packet delay. Compared with UL normal preallocation, UL smart preallocation increases the delay and therefore decreases the DL web browsing rate. UL smart preallocation also increases the start delay for services initiated by upstream devices."

    BR

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