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Thread: L.RRC.SetupFail.Noreply failure reason in Huawei TDD

  1. #1
    Junior Member Reputation: 10
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    2019-04-12
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    Default L.RRC.SetupFail.Noreply failure reason in Huawei TDD

    Hi Guys

    can you please share your knowledge and experience about L.RRC.SetupFail.Noreply failure issue.

    RRC SSR in some cells is reducing and the only failure i could find is this,

    i want to know which reason can make this failure, and how can troubleshoot it?

    526727084 L.RRC.SetupFail.NoReply Number of RRCconnection setup failures due to no responses from the UE

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  3. #2
    Junior Member Reputation: 10
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    2017-03-13
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    Default Re: L.RRC.SetupFail.Noreply failure reason in Huawei TDD

    Hi

    I might be due to less power used to transmit RRC Setup Complete (MSG4) from UE. During this time UE is under open loop power control

    Thanks

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  5. #3
    Member Reputation: 39
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    2010-08-02
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    Default Re: L.RRC.SetupFail.Noreply failure reason in Huawei TDD

    we are also dealing with this. we have many cells with rural >6km coverage and some of them >13km giving at some point lots of rrc noreply. im adjusting timer . have you adjusted RACH parameters to try to avoid this ?
    i will try but if you did try let us know please !

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  7. #4
    Member Reputation: 39
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    Default Re: L.RRC.SetupFail.Noreply failure reason in Huawei TDD

    the case is that sometimes your mobile is at a very difficult possition where it can send the RACH request channel but after nodeb answers it cannot answer. that´s a noReply failure.
    theres a timer that we tested to improve, but the best scenario is that you cut coverage... to avoid this ghosts procedures...
    sometimes it can also be a problem in UL . check RTWP , vswr problems and observe of course PRACH delay counters to get an idea of the coverage

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  9. #5
    Junior Member Reputation: 10
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    2019-04-12
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    Default Re: L.RRC.SetupFail.Noreply failure reason in Huawei TDD

    H, thanks for answer,
    i increased T300 timer but doesn't work, also i increased cell radius and make down tilt but still have this problem
    which RACH parameters you suggest to change?

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