FR1 and FR2 maximum cells per sector

5G NR
1

Hi Experts.
For NR, is below understanding correct?

  1. FR1 can have max 2 cells per sector
  2. FR2 can have max 8 cells per sector
  3. For FR2, is it possible to use 8 cells with BW 400 MHz or its 100 MHz?

FR1 and FR2 maximum cells per sector
FR1 and FR2 maximum cells per sector745Ă—701 99.9 KB

2

Common Thumb rule , Most deployment is based on UE capability support .

Most Latest UE s support max 2CC in FR1 so 2 Cells are deployed but more CCs support will be available later when tech Matures

For FR2 UE needs to support IBW >800MHZ then it can support more BW in FR2 . There is spectrum available in FR2 but UE support is needed. Some UE might support >800MHz but the call might last few seconds as device will heat up with that kind of BW

2 Likes
3

Further adding:

  1. 1 cell or CC for FR1= 8 ssb with digital beamforming
  2. 1 cell or CC for FR2 = 64 ssb max with analog beamforming

Now query is that where hybrid beamforming will use?
Is it for FR2?

4

SSB are 4 if f < 3GHz

5

Yes thanks for reminding for low band it’s 4 :+1:

6

Digital BF cost is high but target beam performance is better than analog.
FR2 if only use analog, performance is not good meanwhile mmWave need high resolution beams, so FR2 need analog & digital together, called hybrid BF.

7

Not really. Are you considering any supplier for this assumption?

8

I mean, if is there some link with 3gpp … I’m not sure.

9

No link

As it depends on actually BBU capacity how much BBU can handle.

In FR2 latest 3GPP release extended to 71 GHz imagine how many cells possible in 1 sector if any supplier don’t support 400 MHz as one carrier :stuck_out_tongue_winking_eye:

10

Its purely HW limitation. No specification for this.

11

Yes big trouble. :wink:

For FR2 I didn’t find carrier having 400 MHz max seen 100 MHz although FR2 support up to 400 MHz.

12

Hello NR Experts.

Please clarify is below correct:

  • For FR 1 max channel bw is 100 MHz and we can have 2 cells per sector.
  • For FR 2 max channel bw is 400 MHz and we can have 8 cells per sector.
  • For FR 1: we can have max 8 ssb per cell ie 8 ssb beams having 8 diff beam index…16 layers per cell
  • For FR 2: we can have 64 max ssb per cell using beam sweeping…2 layers per cell

As there many changes ongoing in new NR release, please confirm above correct or need change.

13

What is source of number of cells per sector?

I don’t know any such limitation at least

14

No such limit.

No such limit.

Yes, as per 3GPP.

Yes, as per 3GPP however no one supports yet 64SSB.

15

+ For FR2 max channel bw is 400 MHz and we can have 8 cells per sector - No one operates in 400MHz mostly 4 carriers of 100MHz each - global deployment.

16

Why 8 cells per sector?

I understand that any limitation of cell/sector is HW limitation.

Not specification limitation.

17

I read it in 2018 when 5G was in early stage…

I mentioned today even I’m not sure as many changes ongoing for NR…

Even new bands and new bandwidth option seen as well… :frowning:

18

I don’t believe there going to be such implementation in parctical scenario…

For FR1 2 cells per sector is general deployment.

And for FR2, going to see more in that line…

Or at max 3 carrier per sector.

19

I think in FR1, 2 bands are available 1 for coverage & 1 for capacity as NR is in early stages.

Also as cust goes on increasing, additional band req will be there.

Currently 2 bands are sufficient

20

We need to see more on practical deployment scenrio and spectrum availability as well…

Very few operator will go for such huge deployment.