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Member
Reputation: 264
DL 4x4MIMO is not working
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?
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2022-08-07 08:10 AM
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VIP Member
Reputation: 1716
Re: DL 4x4MIMO is not working
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Member
Reputation: 264
Re: DL 4x4MIMO is not working
it's on Band28
and BW is 10M
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VIP Member
Reputation: 1171
Re: DL 4x4MIMO is not working
Is cabling on antenna correct, no crossed feeders ?
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VIP Member
Reputation: 1716
Re: DL 4x4MIMO is not working
most probably UE does not support of 4T4R for that band
Originally Posted by
hamody2005
it's on Band28
and BW is 10M
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Member
Reputation: 264
1 out of 1 members found this post helpful.
Re: DL 4x4MIMO is not working
Originally Posted by
punto
Is cabling on antenna correct, no crossed feeders ?
yes, ok connected
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Member
Reputation: 264
Re: DL 4x4MIMO is not working
Originally Posted by
DANORM
most probably UE does not support of 4T4R for that band
UE support 4x4 Samsung Note9
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VIP Member
Reputation: 1716
1 out of 1 members found this post helpful.
Re: DL 4x4MIMO is not working
That does not work for Band28. Its working on other bands.
Originally Posted by
hamody2005
UE support 4x4 Samsung Note9
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Member
Reputation: 264
Re: DL 4x4MIMO is not working
Originally Posted by
DANORM
That does not work for Band28. Its working on other bands.
from capability ifound this for band 28 "messagesupportedMIMO-CapabilityDL-r10 = twoLayers"
Does it means it's only 2x2 or its for CA only.
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Member
Reputation: 108
Re: DL 4x4MIMO is not working
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.
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