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Thread: About SHO factor

  1. #1
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    Default About SHO factor

    Hi Experts;

    As you know, SHO factor should be in between 30-40% for whole network. So, in our network, this value is 39% and we have RAB establishment problem, our overall rate is about 86%. And i know that if there are alot of handoff in one cell it produce CE consumption problem and it effects the RAB establishment. When i investigate the some counters i can see that our some cells have low RAB establishment, high handoff attempt(i.e. 132000 per week). If we decrease SHO attempt we can increase our RAB establishment. Am i right? or What kind of solution can we use for this.

    BR.

    KADIR.

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  3. #2
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    kadir

    have u investigation what is the causeof RAB establishment failure , it would not be just high handoff rate . Do you also know which type of service fail to setup , what is the load on the cell etc.

    desi

    Quote Originally Posted by kadir View Post
    Hi Experts;

    As you know, SHO factor should be in between 30-40% for whole network. So, in our network, this value is 39% and we have RAB establishment problem, our overall rate is about 86%. And i know that if there are alot of handoff in one cell it produce CE consumption problem and it effects the RAB establishment. When i investigate the some counters i can see that our some cells have low RAB establishment, high handoff attempt(i.e. 132000 per week). If we decrease SHO attempt we can increase our RAB establishment. Am i right? or What kind of solution can we use for this.

    BR.

    KADIR.

  4. #3
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    Default

    Quote Originally Posted by desi_larka View Post
    kadir

    have u investigation what is the causeof RAB establishment failure , it would not be just high handoff rate . Do you also know which type of service fail to setup , what is the load on the cell etc.

    desi
    Hi friend thank for your reply

    i investigated the congestion reasons and i have got;

    97.9 % of the RAB Attempts % Not Established(13.8 %) is due to RAB Congestions during Admission control % PS.

    what is your suggesiton about that. if it is not only because of high SHO.

    br

  5. #4
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    Default

    and 100 percent of the congestion reason is because of CE consumption.

  6. #5
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    Default

    check the load on the system

    check you bear control , admission control & congestion control thresholds. Also if UE demands high power then also it can happen. I am assuming you have enough HSDPA codes allocated etc..


    let me know


    Quote Originally Posted by kadir View Post
    Hi friend thank for your reply

    i investigated the congestion reasons and i have got;

    97.9 % of the RAB Attempts % Not Established(13.8 %) is due to RAB Congestions during Admission control % PS.

    what is your suggesiton about that. if it is not only because of high SHO.

    br

  7. #6
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    Default

    and for 100 NodeB, we have;

    PS Interactive Type Traffic carried on HS A,DCH excluding SHO=353,46 erlang
    AMR voice traffic=27.35
    CS Conversational 64 kbps traffic =0.71
    PS Interactive Type Traffic carried on R99 DCH (excluding FACH, HS and EUL)=2.77


    all these values are for a week.

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