How many beams can be formed in one NR site?

5G NR
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1

How many beams can be formed in one NR site?
How many UE can latch in one beam at that time?
Both wide band for initial access or narrow band for data.

How many beams can be formed in one NR site
How many beams can be formed in one NR site750×552 56.3 KB

2

SSB beams are:

  • 4 for f < 3GHz
  • 8 for 3GHZ < f < 6 Ghz
  • 64 for f > 6 GHz.
4

Thanks.
And how many UE can latch in that beam at that time? (NSA)

5

I don’t remember to be a limit for it.
But probably there is some sw/hw limitation vendor based.

6

Are these beams 3D beams or horizontal and vertical beams?

7

It depends on AAU type N1 and N2.

8

So SSb beam 4 for example means in type N1 four horizontal and four vertical for f less than 3 GHz?

9

No, it means 4 SSB to cover the whole cell footprint.
Or 8SSB.
Or 64 SSB.

10

Be it horizontal or vertical. Got it, thanks!

11

Those are static beams.
For PDSCH there are dynamic beams based on N1 and N2.

12

Dear Experts.

For 5G NR low band 700 / 900 MHz, how many SSB beams are there?

Is it wide or narrow beams?

13

What SCS?

14

15 or 30.

15

  • If SCS is setting to 15 KHz, so max SSB is 4 for freq less than 3000M.

  • If SCS is setting to 30 KHz, so max SSB is also 4 for freq less than 3000M.

As a rule, no of SSB blocks that should equal no of beams, depends on :

  • SCS
  • Freq band
16

So for NR Freq band N78 - 60 MHz how many SSBs?

17

Thanks. But this is theory.

Actually NR low band use RRU 4T4R with passive antenna - it may not support narrow beam.

18

N78, means 3500 band, so here you move to freq range >= 3000M, so number of SSB will increase to 8, hence no of beams will be also 8.