Per TTI max ue can support?

4G LTE
1

Single tti in downlink how many UE can receive pddch?

2

Hi @karikalantech_karuna
Per TTI UE scheduling depend PDCCH allocation and minimum req. for PDCCH for 1 UE is 1 CCE’s except 1.4 MHz .
1 CCE- 9REG- 36RE’s.
For Ex, for 20 MHz-
20 MHz- 100 RB’s

Now to exact calculation , you need to 1st calculate PCFICH,PHICH than PDCCH.
DTX/RS- 4 RE’s and over 100 RB’s will come around -~ 400 RE’s
PCFICH- 16 RE’s ( 4REG)
PHICH- 3 REG depend on ng factor value with respective bandwidth so took ng value- 1 , gives you 13 Resource group.
So it will come around 13*12=156 RE’s
PDCCH- let took 3 symbol 12 subcarrier so 36 RE’s and 100 RB’s ~ 3600 RE’s…( its rough count)

For exact RE’s count - 3600–16-156-400= 3028 RE’s

Count CCE=3028/36~ 84 aprx.

So ultimately you can schedule 84 UE’s with 1 CCE each.

It’s rough calculation just to give brief about PDCCH while exact process is quite long.

Thanks,

1 Like
3

thanks for your quick response one more doubt

3028 => number of Resource Element
but 56 this denote what?

4

Hi folks,
Single tti in downlink how many UE can receive pddch in NR 5G?

5

It’s typo …it’s not 56 …it’s 36, just corrected.
1CCE=9 REGs =9*4=36 where 1 REG=4 REs.
So to calculate total CCE we divide total REs to REG that gives CCE count…
Thanks,

6

thanks vikas

7

can anyone help me how to calculate CCE in NR 5G?