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High CDR during Rainy Days

Viewing 5 posts - 1 through 5 (of 5 total)
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  • 12th November 2011 at 20:17 #67496
    Alex
    Guest

    in our network, it was observed Call drop Rate is increasing in rainy days. What may be the reason ?

    13th November 2011 at 12:20 #67497
    paraHO
    Guest

    Alex some guessing by me.

    MS expected still connect to BTS mast in heavy rain conditions.

    Are these 2G or 3G call drops?

    Are the MSs in fringe coverage area – cell breathing? You considered maybe increase power output of BTSs rainy days?

    15th November 2011 at 10:29 #67498
    Rex
    Guest

    Hi,
    it could be because of Abis problems if 2Mb links are Microwave. If you are ALU then check if drops are due to remoteTC. Microwave links can cause problems in heavy rain conditions.
    Regards,
    Rex

    15th November 2011 at 14:31 #67499
    pix
    Guest

    yes, rain causes more loss on the radio path:
    -on air interface, cell coverage is reduced (max -3dB, in very heavy rain)
    – on abis, if microwaves are used, links are lost intermittently

    also,
    * water in the antenna feeders/connectors -> it reduces the coverage even more
    * a statistical effect : more calls are made indoor or in-car, less calls are made outdoor -> rxlev is lower -> call drops occur more frequently.

    19th November 2013 at 10:14 #67500
    Ds
    Guest

    Hi,
    In one of our circles,3G voice traffic is very less but due to lower Denom, % value is high. call drops are on random cells and generally not more than 10 on concerned cells.
    kindly suggest some ways to improve such cases or any parameter settings for DCR improvement.
    vendor is NSN.

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