2 Questions regarding Huawei GSM PC3

[abdelrahman.mansour]

Hi Dears

I have 2 Questions regarding Huawei GSM PC3

1- whats the advantage of having 2 equations of PC3 step calculation ???
2 its says in Manuals that If step(k) is greater than 0, then step(k) is equal to 0, that is, transmit power is not adjusted. this seems to be illogical as there should be power inc if RxLev is bad or bad Qual is existing ??

Calculation of the power control step
The power control step of the optimized Huawei III Power Control algorithm is calculated on the basis of two step factors: step1(k) and step2(k).
step1(k) is determined by RexLev Protect Factor, RexQual Protect Factor, STarget, and QTarget. The calculation formula is as follows:
− step1(k) = - {RexLev Protect Factor x (ca_filtered(k) - SThr) + RexQual Protect Factor x (qa_filtered(k) + QOffFh - QThr)}
Where,
− RexLev Protect Factor indicates III UL RexLev Protect Factor/III DL RexLev Protect Factor.
− ca_filtered(k) indicates the measured receive level after the filtering.
− SThr = ("ULRexLevHighThred/DLRexLevHighThred"+"ULRexLevLowthred/DLRexLevLowthred")/2.
− RexQual Protect Factor indicates III UL RexQual Protect Factor/III DL RexQual Protect Factor.
− qa_filtered(k) indicates the measured receive quality after the filtering.
− QThr = ("UL ** Rex Qual. Upper Threshold/DL ** Rex Qual. Upper Threshold" + "UL ** Rex Qual.Lower Threshold/DL ** Rex Qual.Lower Threshold")/2.
− QOffFh indicates FH gain.
step2(k) is determined by RexLev Adjust Factor, Rex Qual.Adjust Factor, STarget, and QTarget. The calculation formula is as follows:
− step2(k) = - {sfactor x (ca_filtered(k) - SThr) + qfactor x (qa_filtered(k) + QOffFh - QThr)}
Where,
− sfactor indicates ULRexLevAdjustFactor/DLRexLevAdjustFactor.
− ca_filtered(k) indicates the measured receive level after the filtering.
− SThr = ("ULRexLevHighThred/DLRexLevHighThred"+"ULRexLevLowthred/DLRexLevLowthred")/2.
− qfactor indicates ULRexQualAdjustFactor/DLRexQualAdjustFactor.
− qa_filtered(k) indicates the measured receive quality after the filtering.
− QThr = ("UL ** Rex Qual. Upper Threshold/DL ** Rex Qual. Upper Threshold"+"UL ** Rex Qual.Lower Threshold/DL ** Rex Qual.Lower Threshold")/2.
− QOffFh indicates FH gain.
The step factor step(k) is determined according to the formula step(k) = max(step1(k), step2(k)). Subsequently, based on this step factor, power control adjustment is performed. If step(k) is greater than 0, then step(k) is equal to 0, that is, transmit power is not adjusted.

[abdelrahman.mansour]

No Answers??? I hope domebody helps in this

[RF engineer]

Hi Dears

I have 2 Questions regarding Huawei GSM PC3

1- whats the advantage of having 2 equations of PC3 step calculation ???
2 its says in Manuals that If step(k) is greater than 0, then step(k) is equal to 0, that is, transmit power is not adjusted. this seems to be illogical as there should be power inc if RxLev is bad or bad Qual is existing ??

Calculation of the power control step
The power control step of the optimized Huawei III Power Control algorithm is calculated on the basis of two step factors: step1(k) and step2(k).
step1(k) is determined by RexLev Protect Factor, RexQual Protect Factor, STarget, and QTarget. The calculation formula is as follows:
− step1(k) = - {RexLev Protect Factor x (ca_filtered(k) - SThr) + RexQual Protect Factor x (qa_filtered(k) + QOffFh - QThr)}
Where,
− RexLev Protect Factor indicates III UL RexLev Protect Factor/III DL RexLev Protect Factor.
− ca_filtered(k) indicates the measured receive level after the filtering.
− SThr = ("ULRexLevHighThred/DLRexLevHighThred"+"ULRexLevLowthred/DLRexLevLowthred")/2.
− RexQual Protect Factor indicates III UL RexQual Protect Factor/III DL RexQual Protect Factor.
− qa_filtered(k) indicates the measured receive quality after the filtering.
− QThr = ("UL ** Rex Qual. Upper Threshold/DL ** Rex Qual. Upper Threshold" + "UL ** Rex Qual.Lower Threshold/DL ** Rex Qual.Lower Threshold")/2.
− QOffFh indicates FH gain.
step2(k) is determined by RexLev Adjust Factor, Rex Qual.Adjust Factor, STarget, and QTarget. The calculation formula is as follows:
− step2(k) = - {sfactor x (ca_filtered(k) - SThr) + qfactor x (qa_filtered(k) + QOffFh - QThr)}
Where,
− sfactor indicates ULRexLevAdjustFactor/DLRexLevAdjustFactor.
− ca_filtered(k) indicates the measured receive level after the filtering.
− SThr = ("ULRexLevHighThred/DLRexLevHighThred"+"ULRexLevLowthred/DLRexLevLowthred")/2.
− qfactor indicates ULRexQualAdjustFactor/DLRexQualAdjustFactor.
− qa_filtered(k) indicates the measured receive quality after the filtering.
− QThr = ("UL ** Rex Qual. Upper Threshold/DL ** Rex Qual. Upper Threshold"+"UL ** Rex Qual.Lower Threshold/DL ** Rex Qual.Lower Threshold")/2.
− QOffFh indicates FH gain.
The step factor step(k) is determined according to the formula step(k) = max(step1(k), step2(k)). Subsequently, based on this step factor, power control adjustment is performed. If step(k) is greater than 0, then step(k) is equal to 0, that is, transmit power is not adjusted.

Dear

1-In PC3 both Rx level and RX Qual are dependent which make it more stable than PC2 which both indicator independent.

2-For step K calculation is relative to Maximum power so BTS and MS can't increase power when you transmit on Full power.

BR

[abdelrahman.mansour]

Thank you so much my friend

it was very helpful for Q 2

Any body has any info about optimum settings and how each parameter is affecting performance of PC ?


BR