In LTE after grant,I sent DCI after that I receive UL packets which has no power(modem side). What could be the reason ?

Question

In LTE after giving grant,I sent DCI after that I receive UL packets which has almost zero power(modem side). what could be the reason here?

Comments

Hi Mohan,

What do you mean by zero power? If you receive UL packets then without power or strength how did you decoded the UL packets? Zero power reception is at ENB or UE side?

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Its modem at enodeb side & UL packets having less power. No uplink transmission.

Answer 1

Hi ,

This can be pathloss issue, please check the CQI / SRS which UE reports, maybe from SRS you can calculate the pathloss and UL received power. This maybe the problem which leads to less power reception in UL data at ENB. ENB should command UE to use its max power to transmit the data. This can be done using TPC MAC command. UE also can report its power headroom report to ENB to calculate UE's transmit power.