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Member
Reputation: 16
Open loop power control
Hello, we know that UE in open loop power control calculates the PRACH power before sending it by calculating it from received level, require c/I, UL load....
Assuming that we have a UE that after calculating the required PRACH power needed it exceeds the max power that can be send by UE, what would the UE do?
Ie after calculation the UE should send 33 dBm while the max power that can be sent by UE is 24
many thanks.
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2013-03-13 06:22 AM
# ADS
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Member
Reputation: 150
Re: Open loop power control
Just got this out of a trainning (nsn), hope it helps you out.
N.
•The maximum allowed UE transmit power for the PRACH procedure is defined by UEtxPowerMaxPRACH. Layer 1 of the UE controls the UE transmit power during the PRACH procedure using the ‘commanded transmit power’. If the commanded transmit power exceeds the maximum allowed transmit power then the UE transmits the maximum allowed transmit power.
•If the commanded transmit power exceeds the maximum allowed transmit power by 6 dB then layer 1 of the UE is able to inform higher layers and exit the PRACH procedure. If the step size is 1 dB then this corresponds to transmitting 6 preambles at maximum power.
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