- This topic has 11 replies, 1 voice, and was last updated 11 years, 1 month ago by Junior RF Man.
25th November 2008 at 05:42 #54744MKTGuest
During drive test…
I observe …
In dedicated mode
whether the HSN is 2 or 22
the TCH frequecies are hopping in a cyclic manner…
For HSN 1 MAIO=4
I see following fashion:
Is it said to be random???
Regards25th November 2008 at 05:46 #54745MKTGuest
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 sequence25th November 2008 at 09:32 #54746naserGuest
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 #54747pixGuest
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 #54748MKTGuest
You can check this in TEMS Pocket.
Pocket view ON
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….
Regards4th December 2008 at 22:16 #54749VictorGuest
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 #54750bjushkaGuest
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.
Bjushka18th March 2010 at 08:14 #54751bjushkaGuest
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.
bjushka18th March 2010 at 08:19 #54752pixGuest
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)
pix18th March 2010 at 09:11 #54753bjushkaGuest
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 firstname.lastname@example.org
thanks in advance
bjushka4th November 2010 at 07:58 #54754Fresh OptGuest
What’s the relevance of HSN in BaseBandHopping? What value should we use?
Regards,4th November 2010 at 13:41 #54755Junior RF ManGuest
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…