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HSN …

  • This topic has 11 replies, 1 voice, and was last updated 14 years ago by Junior RF Man.
Viewing 12 posts - 1 through 12 (of 12 total)
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  • 25th November 2008 at 05:42 #54744
    MKT
    Guest

    Hi all.

    During drive test…
    TEMS INVESTIGATION..

    I observe …
    In dedicated mode

    whether the HSN is 2 or 22

    the TCH frequecies are hopping in a cyclic manner…

    for example:
    For HSN 1 MAIO=4
    I see following fashion:
    731>732>734>735>736>737>738>739>740>741>742>743>744>745>746>747>748>749

    Is it said to be random???

    Regards

    25th November 2008 at 05:46 #54745
    MKT
    Guest

    Sorry

    I missed yo type 733.

    It is like

    731>732>733>734>735>736>737>738>739>740>741>742>743>744>745>746>747>748>749>731….and same sequence

    25th November 2008 at 09:32 #54746
    naser
    Guest

    Hi,
    How can you see from the drivetest(TEMS) that at each TDMA frame MS are at that particular hopping ARFCN ?
    I mean,I can see that ,TEMS shows only the hopping channel(yes/no) and the hopping frequencies,MAIo,HSN.
    But how you can see the hopping order from TEMS?

    25th November 2008 at 09:38 #54747
    pix
    Guest

    MKT,

    It is said to be “pseudo” random, defined by the parameters T1, T2, T3 and the HSN. Perhaps HSN 2 and 22 outputs the same sequence at this particular moment ?

    I’m surprised TEMS can show you this sequence.. It will (should) change once in a while during the call, because the T1, T2 and T3 are changing. I forgot the details…

    26th November 2008 at 04:05 #54748
    MKT
    Guest

    Hi,

    You can check this in TEMS Pocket.

    Pocket view ON

    Menu No-1
    Serving Cell(1)
    B 13 25 -57
    t TC TS Tx
    C/I RQ FER
    ………

    Here just have a look at TC which
    changes the pattern just I mentioned earlier….

    Regards

    4th December 2008 at 22:16 #54749
    Victor
    Guest

    The sequence you see is only the frecuencies that belong to the MAL assigned to this cell (in ascending order) , it´s not the real sequence for hopping. take in acount that the hopping is done too many times by second.

    17th March 2010 at 16:45 #54750
    bjushka
    Guest

    Hi everyone,

    I cant understand the difference between HSN = 1 and the other values of HSN (2,3,4…63) In case when we are applying RF hopping if HSN will order the frequencies (f1, f2, f3…fn) in a pseudo random order for HSN≠0, what diference will make if HSN is 1 ose 2 for exampe?
    Hope someone can help me, its a little bit confusing.

    BR
    Bjushka

    18th March 2010 at 08:14 #54751
    bjushka
    Guest

    its me again, about my question below, what is the meaning of using diffrent HSN in RF hopping? Maybe using values HSN = 1 or 2 or 3 … mean that we are using diffrent MA lists or is the way the random frequencies order is done in different timeslots???

    Hope I was clear.
    BR
    bjushka

    18th March 2010 at 08:19 #54752
    pix
    Guest

    hello,

    yes, HSN is the order of the frequencies in the MA list.
    HSN 1 will generate a different “random” ordering than HSN 2.

    There is no point knowing the “random” formulas. You should jsut know that each HSN will generate an order totally different than the other HSN. Except HSN 0 which is “no order” (cyclic)

    Cheers
    pix

    18th March 2010 at 09:11 #54753
    bjushka
    Guest

    so we can use the same MA list for example for two or three adjacent BTSs and the only thing we have to change is the HSN? Is this right?
    Pix could you help me with worthy 😉 materials, if you have, about frequency hopping feature. I am more interesed for Nokia systems.
    My e-mail is bjushka@gmail.com

    thanks in advance
    bjushka

    4th November 2010 at 07:58 #54754
    Fresh Opt
    Guest

    Hi,
    What’s the relevance of HSN in BaseBandHopping? What value should we use?
    Regards,

    4th November 2010 at 13:41 #54755
    Junior RF Man
    Guest

    Do we use HSN in Base Band Hopping? In many documents mentioned that 2 HSN used in BBH. One of them for TSs-0, the rest for other TSs. Of course except BCCH TS.

    Again my question is: do we use HSN in BBH? If yes, please explain. If not, please explain.

    Thanks in advance…

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