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In Uplink Power Control how Additional Maximum Power Reduction (A-MPR) parameter signaling works.

+4 votes

The Network Signaling NS_X value may be sent by E-Node B anytime?
In a handover procedure, the eNodeB may request that the UE change its RF specifications for a new condition (A-MPR)?
If yes, what message would be sent to convey this information?

posted Apr 21, 2014 by anonymous

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1 Answer

0 votes

If I understand correctly, the NS_X and A-MPR (additional maximum power reduction) are the parameters taken from 3GPP TS 36.101.

All power related parameters (except transmit power commands), are provided to the UE with the use of RRC signalling (see 3GPP TS 36.331).

RRC IE (information element), that directly relate to A-MPR (from TS 36.101) is called additionalSpectrumEmission (in RRC specification, i.e. TS 36.331). It is present in:

SystemInformationBlockType2 (see TS 36.331, section 6.3.1)
and as a part of MobilityControlInfo that is an IE present in RRCConnectionReconfiguration message, used for the purpose of Handover Command.
The network provide A-MPR:

to all the users in a particular cell (idle and connected), by broadcasting system information;
during Handover Procedureto the handed-over UE within RRCConnectionReconfiguration message, so that UE knows, what are the power settings / limitations in the target cell.

answer Apr 22, 2014 by Maninder Bath
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+1 vote

The radio condition from network side is appropriate but still RLF has happened because of maximum transmission power. Can any one tell me how it is happening in real network?

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