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Directed Retry Paramters

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Viewing 15 posts - 16 through 30 (of 36 total)
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  • #58124 Reply
    MKT
    Guest

    Well it is good to see you people discussing here.

    After a gap of months today morning i felt to visit here.

    We never know what is written in the destiny…i am on a political track now.

    Now the objective is to fight for justice to make it delivered.

    Good luck

    Yours
    MKT

    #58125 Reply
    Abdel
    Guest

    Thanks Pix,

    Yeah you can understand from the abstract the articles looks very interested. I will let u know if i need any papers before i join it. Thanks again pix.

    #58126 Reply
    Pan
    Guest

    Hello, Abdel! We have activated queuing on all our cells.
    I hope that our friend Mr. Pix will be kind and obliging and will share with us by his advantage to get acces to IEEE docs:)

    #58127 Reply
    Pan
    Guest

    Hello, MKT!
    Glad to meet you again! You are going to run for presidency?

    #58128 Reply
    Pix
    Guest

    Hello MKT, welcome back. It’s a good sign you still keep in touch with dirty technical guys like us :))

    Wish you success, fame and money 🙂

    #58129 Reply
    Abdel
    Guest

    Dear Pix,

    What is the best value for t11 i have 60 seconds but i think 60 is too long. what about the – BTS Q LENGTH I am unable to find this parameter yet but what is the recommended value too.

    #58130 Reply
    Abdel
    Guest

    Sorry pix, the default value i wrong calculated it was 6000 miliseconds equivalent to 6 seconds. This sounds reasonable, also in our we have to kinds of queue, queue when assigned and queue when handover. and I have enable both of them.

    #58131 Reply
    Pix
    Guest

    6 seconds is good.
    BTS Q LENGTH should be about 6 (number of MS in queue at most)

    Queue for incoming HO is a good idea, but be careful it doesn’t increase call drops during HO procedures.

    The queue time for inc HO should be shorter (1 or 2 seconds ?).

    #58132 Reply
    Abdel
    Guest

    Dear Pix,

    I am unable to find the BTS Q length parameter, and i tried to look to the GSM ETSI 08.08 parameter i couldn’t find it may be it is an optional parameter also i refered to the ZTE BSC and Huawei BSC manual so i think it could be a vendor specific.by the way as long as the cell is congested we can queue as much as we can as long as the t11 is not expired. can we?

    #58133 Reply
    Abdel
    Guest

    Direct retry and queuing both are triggered by congestion. If a cell gets congested and both DR and queuing are activated simultaneuosly then which one is triggered first? is it the DR and then queuing? for example first DR is executed and if DR becomes unsuccesful and there are no free tch available at the neighbouring cellsm then is queuing applied or the calls fails?

    #58134 Reply
    Abdel
    Guest

    For our performance right now i have seen a cell with no DR attempts but with 900 queuings attemps in one hour, so it seams the queueing has a higher priority, i am not sure how can you explain?

    #58135 Reply
    Pix
    Guest

    Queue first, then while MS is in Queue, the BSC will attempt DR, or other similar mechanism (forced DR, fast traffic HO – vendor dependent)

    Number of MS in queue should be limited… at least, it is limited in Alcatel system. The BSC can’t handle 1 billion MS in the queue 🙂

    The limit in alcatel is BTS Q Lenght. It either doesn’t exist in your system, or it has another name (MS queue ? queue limit ? queue size ? waiting number ?)

    🙂

    #58136 Reply
    Fresh Opt
    Guest

    Hi,
    is it good to enable Fast Traffic HO in all cells of the network or only those with congestion?
    thanks,

    #58137 Reply
    Pix
    Guest

    You could enable it everywhere, since the BSC would only “use” it for congested cells.

    Fast Traffic HO becomes active only when the cell is fully congested and nore TCH can be allocated to incoming calls.

    #58138 Reply
    Abdel
    Guest

    There are some parameters that can help u to optimize ur Traffic load Handover such as a parameter that decides the adjacent cell’s frequency band and layer selected during traffic handover and the Threshold of Traffic for Handover
    When the TCH occupation rate of a cell is greater than the specified then Traffic Handover is triggered, usually the default value for this type of HO is 70% so please check b4 u activate it.
    Directed retry, queue and Traffic load control handover are all nice features that helps u to reduce the congestion i enabled them on all my cells and CSSR has increased sharply u can’t imagine.

Viewing 15 posts - 16 through 30 (of 36 total)
Reply To: Directed Retry Paramters
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