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Thread: TCH block & Direct retry

  1. #1
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    Default TCH block & Direct retry

    Experts, what's the formual of calculating TCH Block rate with Directed retry

    and firslty what's directed retry

    Thanks a lot

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  3. #2
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    Quote Originally Posted by justdream View Post
    Experts, what's the formual of calculating TCH Block rate with Directed retry

    and firslty what's directed retry

    Thanks a lot

    directed retry is the feature used to relief congestion an it is kind of SDCCH to TCH handover and you have to chek you congestion formula if it takes incoming HO attempts.
    BR
    RF

  4. #3
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    I'm speaking about TCHblock_after Directed retry

    what should be the formula ?

  5. #4
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    the formula is the same as i know in huawei i donot know foe other if you have manual of kpi u can see

  6. #5
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    Quote Originally Posted by RF engineer View Post
    the formula is the same as i know in huawei i donot know foe other if you have manual of kpi u can see
    kindly share yours as in my manual I have TCHBlockRate but I don't see that ine after Directed Retry

  7. #6
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    Quote Originally Posted by justdream View Post
    kindly share yours as in my manual I have TCHBlockRate but I don't see that ine after Directed Retry
    yes there is no counter say TCh blocking with direct retry
    BR
    RF

  8. #7
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    Quote Originally Posted by justdream View Post
    Experts, what's the formual of calculating TCH Block rate with Directed retry

    and firslty what's directed retry

    Thanks a lot
    It's a feature to reduce the RTCH congestion by taking the SDCCH from the Serving Idle mode Cell and the TCH from the neighbour cell if the level is good (More than -85dBm) and more free TS available (4 free TS):

    here a report about the Directed Retry from ALU:

    http://www.4shared.com/file/22331620...DR_Report.html


    Cheers,

  9. #8
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    Default Re: TCH block & Direct retry

    Quote Originally Posted by justdream View Post
    Experts, what's the formual of calculating TCH Block rate with Directed retry

    and firslty what's directed retry

    Thanks a lot
    For NSN:

    100* DECODE( nvl(traffic.tch_call_req,0),0,0,( nvl(traffic.tch_call_req,0)- nvl(traffic.tch_norm_seiz,0)) / nvl(traffic.tch_call_req,0))

    BR

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