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Nokia LAPD measurement

Viewing 10 posts - 1 through 10 (of 10 total)
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  • #40087 Reply
    Ray
    Guest

    Does anyone know how to activate LAPD traffic report in BSC (logical file name LAPDFROCA). Thanks.

    #40088 Reply
    Jessy
    Guest

    I got some write up on NOKIA LAPD measurement. Pls. allow me to send you the doc.

    #40089 Reply
    Ray
    Guest

    Hi Jessy thanks for your reply, my email add. is ray19939@hotmail.com. Thanks in advance.

    #40090 Reply
    Liz
    Guest

    count me in too. email –> eliz1978i@hotmail.com. Thanks.

    #40091 Reply
    Mohammad Yasin
    Guest

    HI Jessy
    Please count me too for the document y email- engineeryasin@yahoo.com

    #40092 Reply
    Miguel
    Guest

    Hi Jessy
    please count me too, thanks —> mial8@hotmail.com

    #40093 Reply
    Oliver
    Guest

    I’ve seen Nokia LAPD counter from BSS part and they can tell you bytes TX and RX but this is a real-time counter which is updated every half hour by default. There are no way to store this information.

    Oliver

    #40094 Reply
    alexander
    Guest

    Hi, Oliver!
    Please, give me the command to see LAPD measurement. I know only couple of command to see measuremnt on bsc, ZOLT and ZTPI. Wich commands you know to interrogate LAPD measuremnt?

    alex
    http://www.dx200.biz

    #40095 Reply
    Jessy
    Guest

    Hi Guys,

    Sorry I’d been away for sometime. In case those didn’t receive the doc, here’s the info.

    LAPD measurement
    LAPD traffic report (221/DDH)
    The logical output file for the ASCII report is the LAPDFROCA and the LAPDFROCB for the binary report.
    An example of a LAPD traffic report:
    DX 200 MSCLAB 1998-08-01 19:31:34

    D-CHANNEL MEASUREMENT REPORT PART 3, LAST PART

    TRANSMITTED AND RECEIVED FRAMES AND OCTETS ON D-CHANNEL

    MEASUREMENT PERIOD
    START : 1998.08.01 18:00:00
    END : 1998.08.01 19:30:00

    D-CHANNEL : 28 TYPE : PRI

    TRANSMITTED RECEIVED
    I FRAMES : 162 162
    UI FRAMES : 0 0
    I FRAME OCTETS : 5022 5022
    UI FRAME OCTETS : 0 0
    TOTAL OCTET COUNT : 14742 14742

    END OF LAST PART

    END OF REPORT
    The availability report on the signalling links includes the following measurement data on the D-channels that are measured:
    Measurement data
    ·D-CHANNEL
    The number of the D-channel.
    ·TYPE
    The type of D-channel ( PRI = primary / SEC = secondary ).
    ·TRANSMITTED FRAMES / OCTETS
    The number of sent frames and octets (0…4294967295). Every I-frame and UI frame is listed separately, as opposed to the total number of octets.
    ·RECEIVED FRAMES / OCTETS
    The number of received frames and octets (0…4294967295). Every I-frame and UI frame is listed separately, as opposed to the total number of octets.

    Signalling link load

    There are statistical counters that collect information of MTP signalling link availability, performance and utilization. Utilization counters can be used for finding out signalling link loads. The used command are OLU and OLT.
    With measurements 3.1 and 3.2 (transmitted SIF+SIO octets), 3.3 (transmitted MSUs), 3.4 (received SIF+SIO octets) and 3.5 (received MSUs) the average link occupancy can be calculated. Measurement periods are 5 and 30 minutes. Samples of 30 minutes periods should be read especially during the busy hour.
    Measurement values can be read with the OLU command and signalling link load in Erlangs can be read with the OLT command.
    Example 7: Displaying signalling link load
    With the OLT command you can display the signalling link load during last measurement period (5 min or 30 min).

    The following command displays the signalling link load of signalling links 1 to 5 in active unit during last 5 minutes period.
    ZOLT:1&&5,A,P5;

    The output could be the following:
    DX 200 SP240 1999-05-19 09:59:50
    SIGNALLING LINK LOAD
    ACTIVE UNIT

    METERS OF LAST PERIOD: 09:50:00 – 09:55:00 ( 5 MIN)

    RECEIVED TRANSMITTED
    LINK ERLANGS ERLANGS
    ==== ========== ===========
    1 0.157 0.152
    2 0.000 0.000
    3 0.134 0.130
    4 0.199 0.199
    5 0.105 0.132

    COMMAND EXECUTED
    Example 8: Calculating the signalling link load
    Table 64. “Formula for signalling link calculation (outgoing signalling).”
    The sum of counters 3.1 and 3.2 during 30 minutes period is 2.880.000 octets. Counter 3.3 is 144.000 (number of transmitted MSUs). Link capacity is 8192 octets/sec. MTP level 2 overhead should be noted in calculations. Overhead is 6 octets per MSU (F+CK+LI+FSN+BSN).
    Level 2 overhead:
    6 octets * 144.000 = 864.000 octets
    Sent info in link:
    2.880.000 + 864.000 = 3.744.000 octets
    3.744.000 / 30*60 = 2080 octets/sec.
    Link occupancy:
    2080 / 8000 = 0.26 Erl.
    Table 65. “Formula for signalling link calculation (incoming signalling).”
    Recommended link occupancy is 0.2 Erlangs (specified in the ETSI 300 008 specifications). If the occupancy is higher, it is time to consider adding a new link.

    #40096 Reply
    Mohammad Yasin
    Guest

    HI JESSY
    THANKS FOR YOUR DOCUMENT

    FOR ALEXANDER:
    HI ALEX HOW ARE YOU FOR LAPD MEASUREMENT YOU CAN TRY –ZDMF

    STAY IN TOUCH

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