Cellular communication uplink SR - scheduling request- problem in lte 4G

4G LTE
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24

Actually not reasonable for me.
If you have L3 messages captured could you please provide this portion from SIB 2

uplinkPowerControlCommon

        p0-NominalPUSCH: 

        alpha: 

        p0-NominalPUCCH: ?????????? dbm

        deltaFList-PUCCH

            deltaF-PUCCH-Format1: ????????

And if available the following portion in rrcConnectionSetup or rrcConnectionReconfiguration

        uplinkPowerControlDedicated

            p0-UE-PUSCH: 

            deltaMCS-Enabled:

            p0-UE-PUCCH:  ????????????dB
25

Well , I will exactly tell you what does it mean p0-pucch =7 or zero.
the value p0-pucch is according to spec lte of share tech note here -
https://www.sharetechnote.com/html/PowerControl_LTE.html

see the photo down you will understand that the range of p0-pucch is between -8 to 7 -

pmm
pmm912×348 60.4 KB

26

If you did receive the initial grants, it means the power control setting and TA is correct. Now it is SR protocol itself. As @Deepak_Joshi mentioned, you need check UE buffer report related processing. One issue to check, after SR, you didn’t receive grant, but did you receive any other things from eNB, i.e., buffer report request. Did UE meet the requirements of eNB granting? Maybe there are something like configuration mismatch.