[akuiser]

Hi Experts,

If we have 20% traffic utilization for a certain cell, does all TRX (example for 6 trx) will have traffic or some will not?
What is the factor for TCH assignment?

Please help.

[pix]

hi,

it is a vendor-specific algorithm, so there is no global rule. The most logical way of distributing traffic is to allocate it TRX per TRX. So if you have only 20% of traffic over 6 TRX, only 2 of them will be used most of the time.

regards
pix

[akuiser]

Thanks Pix for reply.
I’m using ALU B10. If using BBH, can traffic distributed among TRX even in low utilization?

[pix]

no, because bbh in ALU is not really a baseband hopping. A call is put (and stays) on 1 TRX, and this TRX modifies its frequency every TDMA frame. In other words, BBH in ALU is working as SFH.

The only ways to push traffic to other TRX are:
1/ modify the TRX PREF MARK
2/ lock the other TRX

cheers
pix

[akuiser]

Hi Pix,

Thanks for the good info. Now I know why some trx not carried trafic even we using BBH. Another query,without remove/lock non traffic TRX on low utilization cell, how can we modify the TRX PREF MARK to make the traffic distributed to non traffic TRX?
Here current setting:
TRXs (+) TRX PREF MARK zone type
TRX 01 0 Outer
TRX 02 0 Outer
TRX 03 1 Inner
TRX 04 1 Inner
TRX 05 1 Inner
There is no traffic for TRX03. Can I modify TRX PREF MARK to make TRX03 can carry some traffic?
For info, our management directions to let non utilize TRX on site with carry some traffic.

Pls help.

[Author]

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