EM7565 CA Inter Band Carrier Aggregation

IoT Modules MC/EM Series
1

Hi, I have couple of queries related to Carrier Aggregation in LTE-A
a. How to enable/configure Inter-Band-CA in EM7565
for bands (B7+B4) where Band7 is primary
b. CA combinaton for B66+B7 (although not mentioned in product doc) , is this possible to enable CA for customized combinations

Thanks !!

2

Hi,

a. CA is managed by the NTWK , there is no configuration required in the modem.
b. If the specs doesn’t mention B66+B7 we don’t support it.

thanks,
James

3

Hi James

Thanks a lot !!

a. Requirement B7 (Primary) +B4 (Secondary) , but in product document B4 (Primary) + B7 (Secondary)… will this work …
b. We need to support B66+B4 , but product document says B66+B66 is supported assuming B66 is close to B4 will this work…
B4 FDD 1700Mhz: UL: 1710 – 1755, DL: 2110 – 2155
B66 FDD 1700MHz: UL: 1710 – 1780, DL: 2110 – 2200

Regards
Vikas

4

Hi Vikas,

a. I think it should. For another issue I tested both B3-B7 and B7-B3 both worked, however B7-B3 is not in the PTS either.

b. this is a tricky one. you are right in theory it should work, but if it is not in the PTS we officially don’t support it.

Thanks,
James

5

@ [Oedenburger]

Thanks !! Any tip how to monitor and verify CA is running/working
Enabled LTECA . Do we need to enable any other attribute as well i.e LTERXCONTROL or RXDEN

GSTATUS command for monitoring

Regards !!

6

should have been enabled by default.

you can monitor CA with at!gstatus? “CA state and SCC”

  • please note CA is only activated if data is being sent.
    when RRC goes down SCC will be deactivated
7

As per specs of EM7565, we have combination DL and UL separately…
But after enabling CA we saw tremendous increase in UL and DL is more or less same.

Is there any contradiction in specs/datasheet EM7565 (41110788 AirPrime EM7565 Product Technical Specification r10.pdf)

8

is there a command also for 5G NR ?

thx!

9

You can try at!ratca?

10

I saw it and I saw CA is enabled. However, the CA does not wok on my M91xx. I just wonder if there is anything else that I need to do to enable the NR-CA. thx!

11

Have you connected 4 antenna?
Have you enabled all band in at!band?
Have you enabled all technology in at!selrat?
For 5G ENDC, you need to also generate data traffic in the mbim interface

12

I use the AT!RFCOMBOS and did not see the combination of any NR band even AT!RATCA shows CA is enable. So, I believe it means it is not working ?

13

What did you see for at!rfcombos?
Which fw are you using?

14

FW 03.10.11.00

i saw:
…
n79A[4];A[1]
n78A[4];A[1]
n77A[4];A[1]
n71A[2];A[1]
n66A[4];A[1]
n48A[4];A[1]
n41A[4];A[1]
n40A[4];A[1]
n38A[4];A[1]
n28A[2];A[1]
n25A[4];A[1]
n20A[2];A[1]
n12A[2];A[1]
n8A[2];A[1]
n7A[4];A[1]
n5A[2];A[1]
n3A[4];A[1]
n2A[4];A[1]
n1A[4];A[1]

<== no combination for my SA freq

15

Then that means no CA for 5G SA

16

do you know if it is a HW limiation ? firmware limitation ? or something we can configure ?

thx!

17

no idea…
I don’t see EM9191 is supporting 5G 2FR1 in the RF combos.