CrsGain & PDSCHTypeB Gain in Ericsson


#1

Dear Experts,

Generally speaking we have the concept of Pa and Pb in Huawei and Nokia. In Ericsson the parameters related are CrsGain & PDSCHTypeB Gain. Are they exactly the same as Pa and Pb in Huawei or there is some difference in implementation?Thanks!

CrsGain
"Sets the DL power of the Cell specific Reference Signal (CRS) relatively a reference level defined by the power of the PDSCH type A resource elements. If crsGain is +3dB, the CRS power is 3dB higher than that of a PDSCH type A resource element.

The settings crsGain=4.77db and 6dB are mapped to 3dB. These settings are not supported.

PDSCH type A resource elements are located in symbols that do not contain CRS."

PDSCHTypeBGain
"Sets the DL power of the PDSCH type B resource elements relatively the PDSCH type A resource elements. Values pdschTypeBGain=(0,1,2,3) define the gains (5/4,1,3/4,1/2) respectively, corresponding to the multi-antenna scenario specified in 3GPP TS 36.213.

Example: If the pdschTypeBGain is 3 (gain=1/2), the power of the PDSCH type B resource elements is a factor 1/ 2 of the power of the PDSCH type A resource elements.

PDSDH type A resource elements are located in symbols that do not contain cell specific reference signals (CRS). PDSCH type B resource elements are located in symbols that contain CRS."