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intra handover

Viewing 15 posts - 1 through 15 (of 19 total)
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  • #57340 Reply
    krish
    Guest

    can anyone explain me by using intra cell handover can i control the tch drop?

    #57341 Reply
    coldfire222
    Guest

    somehow it can control tch drop … it can actually improve your DCR if the intra cell handover parameters are well defined

    #57342 Reply
    krish
    Guest

    hey can u tell me how to modify it and how we can control tch drop/

    #57343 Reply
    MAK
    Guest

    Hi Krish,

    in which phase you are talking abt for intracell handover either it is for unlink or downlink interferece?

    #57344 Reply
    krish
    Guest

    ya for both i want to know if i will increase or decrease the max intra cell handover then what it will affcet?

    #57345 Reply
    Pix
    Guest

    Your question has many different answers, depending on what is your cell design, trx design, etc.

    To be simple, just try to increase the intracell ho, then decrease it, and see which one work the best.
    Optimization is mostly about trials. You can’t predict what’s going to work the best in such case.

    Still, if a HO is triggered, it means there is an issue in the cell. The best idea is to fix the initial problem (remove the interference, etc.)

    #57346 Reply
    KRISH
    Guest

    YA THATS RIGHT BUT IF I TRIIGER THE INTRA HANDOVER AT BAD QUALITY THEN IT WILL GIVE GAIN AND DO U KNOW ABT ITS TIMER TINIT AND TMAXIHO IN ERICSSON SYSTEM

    #57347 Reply
    Pix
    Guest

    NO I DON’T KNOW ERICSSON !!!!!!!!!!!!!!!!!!!!

    #57348 Reply
    KRISH
    Guest

    OK THEN TELL ME INGENERAL HOW WE CAN PLAY WITH IT FOR IMPROVING TCH DROPPED? AND DO U KNOW ABT T3101 TIMER/

    #57349 Reply
    Pix
    Guest

    T3101 reminds me of a timer used in HO procedure, isn’t it ?
    Can you recall the definition ?

    How can you play with intracell HO :
    the goal is that the MS is located on another TRX, so that the call will be carried by a different frequency. This is done in order to escape from an interfered frequency.
    If MS is on TRX3/TS6, and if TRX3 is transmitting frequency 57 (example):
    – if the rxqual is bad and the rxlev is good, it means the call is interfered. In this scenario, it is a good idea to perform a intracell ho, to relocate the call onto another TRX.

    #57350 Reply
    krish
    Guest

    ok thanks pix so i can play by increasing or decreasing the rx quality with intracell handover is it?

    #57351 Reply
    Ed
    Guest

    Hi krish

    I definitely agree with pix. Basic idea is to trigger intra cell handover when signal strength is sufficent and bad rx quality at the same time to escape interference by changing channel within the cell.

    For your inquiry regarding the ericsson parameters here’s some info and i hope i might help you:

    When intracell handover takes place TMAXIHO is triggered to 1 and is incremented by 1 every each successful intra cell handover until it reaches the the maximum limit which is defined by the parameter MAXIHO. At this point any further consecutive intra cell handovers are inhibited at a duration defined by the parameter TIHO.When TIHO expires intra cell handover counter is reset back to zero. Then loops back again to same algorithm. TINIT is the time duratin when locating is not allowed after a successful change of channel.

    #57352 Reply
    krish
    Guest

    ok thanks ed but by increasing or decreasing the timer tmaxiho,tinit and maxiho what will be exact effect?

    #57353 Reply
    Ed
    Guest

    Hi Krish

    For TMAXIHO AND MAXIHO; The effect is basically dependent on the difference of the two values. The greater the difference the greater is the no of consecutive intra cell handovers allowed before consecutive handovers are inhibited.

    Increasing TINIT on the otherhand increases the time wherein locating is disallowed after mobile changed channel. This will somehow control pingpong intracell handover if properly set.

    I suggest if your network do have test BTS try adjusting these parameters for you to experience the actual effect..or you can also collect stats after you set some intracell handover parameters before and after and see difference.

    #57354 Reply
    krish
    Guest

    ok thanks ed hey do u know abt t3101 timer

Viewing 15 posts - 1 through 15 (of 19 total)
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