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T200 and N200

What the hell is that. I haven’t heard it before. But just know, I have read from an email. I wanna share it here.

T200 is a timer of acknowledgement trasmission from BTS to MS through LAPD. When BTS transmits a acknowledgement message to MS, T200 times is started in LAPD. If this acknowledgement message is not received by MS until T200 timer is expired then the transmission will be repeated (retransmission).The maximum retransmission is N200+1 times. T200 will be restarted in each retransmission. So, N200 is the maximum number of retransmission of LAPD (Layer-2). If until N200+1 times of retransmission the acknwledgement message, MS still doesn’t receive this message, then the connection will be dropped.

 

This problem is may be caused by hardware problem, bad condition of Radio, or imbalance link (UL and DL).
Hope it’ll be helpfull.
-h’zent’
If until N200+1 times of retransmission the acknwledgement message, MS still doesn’t receive this message, then the connection will be dropped.

 

 

2 responses to “T200 and N200

  1. rudy October 5, 2011 at 3:05 am

    Good explanation

    Keep your job gan😀

  2. anonymous April 22, 2012 at 3:42 am

    Nice one….. Thanks…🙂

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