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Why UL data is not scrambled with RNTI? Why only DL data is scrambled with RNTI?

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posted May 18 by Himani

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1 Answer

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Hi,

RNTI is used to identify the user among all UE. when you give DCI UE doesn't know anything about it, when you scramble with RNTI UE will come to know the particular DCI is for that UE. Incase of UL ENB will give scheduling information so ENB knows when and where UE will send data so no need of RNTI scrambling.

answer May 22 by Jaganathan
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+2 votes

I would like to ask if in LTE FDD deployments if the RB allocations for UL and DL can be asymmetrical?

For example, if I am doing Youtube viewing on my device and I am allocated for 50RB (10MHz) channel for my DL, can my uplink be assigned for only 6RB for example?

This is similar to how TDD deployments, where its expected for the UL/DL to be asymmetrical and TDD take advantage of this to maximize spectrum utilization.

If this is the case that FDD can be asymmetrical - then FDD can be as spectral efficient as TDD Right?
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0 votes

As PSS, SSS and PBCH are present only in center 72 subcarriers, but why CSRS is present throughout the bandwidth?


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