SAHIL singh — Software Engineer

I specialize in end-to-end protocol stack testing of 4G LTE and 5G NR, with deep hands-on experience across PDCP, RLC, MAC, and PHY layers. My expertise lies in analyzing real-time behavior, validating 3GPP compliance, and debugging critical features using industry-grade tools. I have strong command over: 🔹 PDCP layer: SDU/PDU handling, ciphering, integrity protection, ROHC, SDU discard, and split bearer forwarding in Dual Connectivity 🔹 RLC layer (AM/UM/SN): segmentation, concatenation, polling (Poll PDU/Poll Byte), status PDU, retransmission, reordering, reassembly, and duplicate elimination 🔹 MAC layer: HARQ processes, DRX configuration and testing, BSR/CR/Truncated BSR handling, random access, priority-based scheduling, and buffer management 🔹 PHY layer: Transport Block (TB) handling, MCS-based allocation, CRC decoding, beamforming configuration, SSB/SRS-based measurements, power control & signal attenuation testing I have validated critical 3GPP-based scenarios such as: LDPC decoding failure due to base graph mismatch (38.212) DCI 1_0 decoding & PDSCH misalignment (38.214) PDCP split bearer issues in Dual Connectivity (37.340) SSB/PSS timing errors in mobility scenarios (38.304) EN-DC Handover drops and Xn failure debugging (37.340) Expertise in Python scripting, TTCN,MATLAB I've performed detailed testing scenarios across: ✅ Dual Connectivity (EN-DC) split bearer validation ✅ Carrier Aggregation (CA) setup testing and reconfiguration ✅ Throughput optimization using multiple DRB paths ✅ Beamforming and CSI reporting evaluation ✅ Handover (Xn/S1, Inter-RAT) and RLF recovery scenarios ✅ Emergency Alert (ETWS/CMAS) testing ✅ Signal attenuation and RF chamber-based robustness testing --- 🛠 Tools & Test Platforms: Keysight UE Simulator, Anritsu MD8430A, TM500, Amarisoft, R&S CM500, QXDM, QCAT, Wireshark, UEResim, TEMS, and custom log parsers. I thrive on debugging layer-by-layer issues using log traces and test scripts, ensuring protocol stack behaviors adhere to 3GPP standards (36.xxx & 38.xxx). Passionate about protocol stack mastery, I continuously work on real-world test scenarios and failure diagnosis both on UE and network simulator sides.

Stackforce AI infers this person is a Telecommunications Testing Specialist with expertise in protocol stack validation and compliance.

Location: Hyderabad, Telangana, India

Experience: 8 yrs 6 mos