No PDCH in overlaid cell(1800) when BCCH is in underlaid(900) for concentric cell

[muhammadbillal]

Dear all, I have concentric cells in my network with BCCH in 900(overlaid cell) and in the overlaid subcell is DCS-1800. I have noticed that there are no PDCH allocated in the DCS-1800 subcell which is the overlaid subcell whereas PDCH only get allocated in GSM-900. Could you tell me what is the possible reason for this? BR, Bilal

[mashi123]

Hi
the channels used during CS or PS setup phase (CCCH/SDCCH/PDCH) should have same coverage area, other wise access failure will occur
after setup is complete the mobile can be assigned to TCH in less coverage area (overlaid) if it's closed to the site

[muhammadbillal]

Even after assignment I do not see any PDCH in the overlaid subcell.

[PM-GIA]

Hi
Have you try to config PDCH in DCS-1800? It might be about license issue. Some operator not buy license for both(900&1800) if they can share/balance traffic.

[forscherau]

some operateors use the 1800MHs cell only for CS traffic, kind of CS traffic vacum cleaner, the 900MHz cell carries the PS traffic, better indoor coverage, propagation, provides better coverage in long distance, and the remaining CS traffic on areas, where the 1800MHz cell can't cover

[mohamed_191_1]

Dear,
Configure IUOCHNTRAN "Dynamic Channel Conversion Parameter of Concentric Cell" to CONVERT2(UL first and convert allowed), but this is only available after Huawei BSS13. Note it might increase TBF drop rate highly.

I hope it was useful info.

[khurramsh3]

Dear bilal,
Do confirm two things.
1.whats your carrier and dcs arfcn range used in network.
2. Have you defined sdcch on dcs in your network?

Sent from my GT-I9300 using Tapatalk 4 Beta

[Rickikoska]

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[muhammadbillal]

Even if i define sdcch on dcs1800 it does not take any sdcch traffic and 1800 also does not take any data traffic.

[plannerguy]

Hi

Is the DCS band allocated with A-Bis resources for Data?

Rgds
Plannerguy

[gunpowder]

it depend on BSC license