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Thread: RS SINR/PDSCH SINR

  1. #1
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    Exclamation RS SINR/PDSCH SINR

    Dear all,

    is LTE CQI calculated based on RS SINR or PDSCH SINR (scheduler will depend on which SINR)
    and why always PDSCH SINR is way better than RS SINR values (from DT measurements)

    Thanks,

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  4. #2
    VIP Member Reputation: 1716 DANORM's Avatar
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    Default Re: RS SINR/PDSCH SINR

    As i know RS SINR should be better than PDSCH SINR due to power utilization is less on RS and impact on SINR from neighbor cells should be less.

    Quote Originally Posted by gunpowder View Post
    Dear all,

    is LTE CQI calculated based on RS SINR or PDSCH SINR (scheduler will depend on which SINR)
    and why always PDSCH SINR is way better than RS SINR values (from DT measurements)

    Thanks,

  5. #3
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    Default Re: RS SINR/PDSCH SINR

    all my logs (E// and Huawei) show that RS SINR is lower Than PDSCH SINR [[Tems Investigation and Discovery]]

  6. #4
    VIP Member Reputation: 1716 DANORM's Avatar
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    Default Re: RS SINR/PDSCH SINR

    Have you tried prediction using your power configurations?

  7. #5
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    Default Re: RS SINR/PDSCH SINR

    currently i'm not using CRSGain or RS Power boosting/deboosting
    so RS power shoud be equal to PDSCH Power == Pa

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  9. #6
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    Default Re: RS SINR/PDSCH SINR

    This result comes from low load network. With good PCI planning, synchronization network, we could say network load for RS is 20-30% because the interference only comes from neighbors in different sites. I believe that PDSCH load even lower than 20%.
    In high load network, PDSCH CINR will worst than RS CINR.

    Quote Originally Posted by gunpowder View Post
    Dear all,

    is LTE CQI calculated based on RS SINR or PDSCH SINR (scheduler will depend on which SINR)
    and why always PDSCH SINR is way better than RS SINR values (from DT measurements)

    Thanks,

  10. #7
    VIP Member Reputation: 1716 DANORM's Avatar
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    Default Re: RS SINR/PDSCH SINR

    even totally no load on the cells, the simulations in Atoll shows that everytime RS SINR is better. Just better to see other guys opinions and practical experience

  11. #8
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    Default Re: RS SINR/PDSCH SINR

    can anyone share their network experience to confirm this issue

  12. #9
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    1 out of 1 members found this post helpful.

    Default Re: RS SINR/PDSCH SINR

    Quote Originally Posted by DANCESTORM View Post
    even totally no load on the cells, the simulations in Atoll shows that everytime RS SINR is better. Just better to see other guys opinions and practical experience
    It's not everytime actually. Figure below show PDSCH CINR is better.
    RS CINR.jpgPDSCH CINR.jpg

  13. #10
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    Default Re: RS SINR/PDSCH SINR

    Quote Originally Posted by gunpowder View Post
    can anyone share their network experience to confirm this issue
    It's not easy because not many handsets can capture PDSCH CINR today

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