Re: DL 4x4MIMO is not working
Hello,
which license have you checked my friend ?
Quote:
Originally Posted by
hamody2005
Dear Expert,
4x4 MIMO is enabled in HW eNB and CFG parameter and licenses are ok, but KPI related to Rank3 & Rank4 shows no PRB are assigned to them.
Could you advise?
Re: DL 4x4MIMO is not working
Quote:
Originally Posted by
mounir34
Hello,
which license have you checked my friend ?
All licenses related to 4x4
4x4MIMO, BB Tx/Rx channel, RF Tx/Rx channel
1 Attachment(s)
Re: DL 4x4MIMO is not working
Quote:
Originally Posted by
subway
I have not seen a single UE that has 4x4 below band 3. Sub-1GHZ is definitely 2x2, but on the RAN side it is similar. Even the dual or triple-band RRUs (ZTE for example) has 4 RX, but only 2 TX per band on combined ports.
But you can attach the full UE capab here, and we can take a look.
Please see attached file, which is for Note9, but from message it's Cat4
Re: DL 4x4MIMO is not working
cat 4 only can 2 layers.
UL AND DL PARAMETERS FOR LTE UE CATEGORIES 1 – 5 |
|
LTE CATEGORY |
PARAMETER |
LTE CAT 1 |
LTE CAT 2 |
LTE CAT 3 |
LTE CAT 4 |
LTE CAT 5 |
Max number of DL-SCH transport block bits received in a TTI |
10 296 |
51 024 |
102 048 |
150 752 |
302 752 |
Max number of bits of a DL-SCH block received in a TTI |
10 296 |
51 024 |
75 376 |
75 376 |
151 376 |
Total number of soft channel bits |
250 368 |
1 237 248 |
1 237 248 |
1 827 072 |
3 667 200 |
Maximum number of supported layers for spatial multiplexing in DL |
1 |
2 |
2 |
2 |
4 |
Max number of bits of an UL-SCH transport block received in a TTI |
5 160 |
25 456 |
51 024 |
51 024 |
75 376 |
Support for 64-QAM in UL |
No |
No |
No |
No |
Yes |
Re: DL 4x4MIMO is not working
Quote:
Originally Posted by
auto_art
cat 4 only can 2 layers.
UL AND DL PARAMETERS FOR LTE UE CATEGORIES 1 – 5 |
|
LTE CATEGORY |
PARAMETER |
LTE CAT 1 |
LTE CAT 2 |
LTE CAT 3 |
LTE CAT 4 |
LTE CAT 5 |
Max number of DL-SCH transport block bits received in a TTI |
10 296 |
51 024 |
102 048 |
150 752 |
302 752 |
Max number of bits of a DL-SCH block received in a TTI |
10 296 |
51 024 |
75 376 |
75 376 |
151 376 |
Total number of soft channel bits |
250 368 |
1 237 248 |
1 237 248 |
1 827 072 |
3 667 200 |
Maximum number of supported layers for spatial multiplexing in DL |
1 |
2 |
2 |
2 |
4 |
Max number of bits of an UL-SCH transport block received in a TTI |
5 160 |
25 456 |
51 024 |
51 024 |
75 376 |
Support for 64-QAM in UL |
No |
No |
No |
No |
Yes |
Thanks , but from Samsung website Note9 is not cat4 "Faster capability in comparison to any other smartphone without a Cat. 18 modem"
Re: DL 4x4MIMO is not working
Perfectly normal, I only know 2 phones in the world that support 4x4 in B28, the Sony Xperia 1 (J9110) and Sony Xperia 1III (XB-BC52).
Re: DL 4x4MIMO is not working
Do they support B20 4T4R?
Quote:
Originally Posted by
joaoo
Perfectly normal, I only know 2 phones in the world that support 4x4 in B28, the Sony Xperia 1 (J9110) and Sony Xperia 1III (XB-BC52).
Re: DL 4x4MIMO is not working
Yes, they suport B20, B28 and also B8 with 4T4R.
Re: DL 4x4MIMO is not working
This phone does not support 4x4 on band 20 or 28 for sure.
Non the less, the fact the modem is Cat4, that does not mean it cannot have 4 receive chains. It can, but not for MIMO (spatial multiplexing), but for simple diversity combining. The UE category only limits the spatial stream number, not the actual receive chain number. :)
Re: DL 4x4MIMO is not working
vérifier le type de votre UE s'il prend en charge 4T4R