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Thread: LTE drop Rate Decreased after DRX enabled

  1. #1
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    Default LTE drop Rate Decreased after DRX enabled

    Dears,

    After DRX enabled for both Nokia and Huawei, the erab drop rate decreased. Any explanation for this behavior?


    BR,

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  3. #2
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    Default Re: LTE drop Rate Decreased after DRX enabled

    it is mentioned in documentation...you gain with these predefined cycles

  4. #3
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    1 out of 1 members found this post helpful.

    Default Re: LTE drop Rate Decreased after DRX enabled

    when DRX enabled, Ue may enter to out of sync state. When there is a downlink data come for the Ue, eNodeB will sent PDCCH order. In case there are no response for PDCCH order, eNodeB consider this as erab drop.
    Also when Ue enter DRX and out of sync, and RRC inactivity timer expired, eNodeB will sent PDCCH order for the Ue to wake up the Ue. In case there are no response for PDCCH order, it is also considered as drop.

  5. #4
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    1 out of 1 members found this post helpful.

    Default Re: LTE drop Rate Decreased after DRX enabled

    do You want to say Increased instead of Decreased ?..

    Quote Originally Posted by fahmi View Post
    Dears,

    After DRX enabled for both Nokia and Huawei, the erab drop rate decreased. Any explanation for this behavior?


    BR,

  6. #5
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    Default Re: LTE drop Rate Decreased after DRX enabled

    The drop decreased ! this doesn't make sense to me !

  7. #6
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    Default Re: LTE drop Rate Decreased after DRX enabled

    triggered counter is : L.E-RAB.AbnormRel.Radio.DRBReset and out of sync reduced

    Any explanation ?

    DRX OFF.jpg

  8. #7
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    Default Re: LTE drop Rate Decreased after DRX enabled

    Maybe you can compare counter L.E-RAB.AbnormRel.eNBTot and L.E-RAB.AbnormRel.

    L.E-RAB.AbnormRel count abnormalRel for Active RAB, and L.E-RAB.AbnormRel.eNBTot count for all RAB (active and non active). Probably the abnormal release on active RAB increased after DRX enable, due to more Ue with active RAB compare to DRX disabled. previously drop counted on L.E-RAB.AbnormRel.eNBTot and now count on L.E-RAB.AbnormRel due to more Ue with active RAB.

  9. #8
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    Default Re: LTE drop Rate Decreased after DRX enabled

    Both counters increased after deactivating the DRX !

    DRX OFF 2.jpg

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