Dinesh Singh

5G/LTE Modem Protocol Test Engineer with 8+ years of telecom testing experience across device/modem validation, protocol testing, field testing, RF validation and network testing. Currently working on LTE and 5G NR modem field validation, covering 5G SA/NSA, LTE, VoLTE, VoNR, RRC/NAS signaling, registration, mobility, handover, data connectivity, throughput and service recovery scenarios. Hands-on experience in modem and protocol log analysis using QXDM, QCAT, Shannon Logs and Wireshark, including issue reproduction, failure analysis, root-cause investigation, defect reporting, fix verification and regression testing.

Strong understanding of PHY, MAC, RLC, PDCP, RRC and NAS with practical experience correlating protocol behavior with RF conditions and live commercial network behavior.

Test Lead at HCL Tech (2023-05 – Present)

Modem Field Testing / LTE & 5G NR Protocol Validation

• Perform LTE and 5G NR modem field testing and protocol validation on commercial operator networks.
• Execute validation across LTE, 5G NSA, 5G SA, VoLTE and VoNR scenarios.
• Validate modem behavior for network acquisition, LTE attach, 5G registration, data connectivity, mobility, handover, throughput, service continuity and network recovery.
• Perform RRC and NAS signaling analysis during registration, mobility, handover and failure scenarios.
• Validate LTE intra-frequency and inter-frequency handovers and LTE/NR mobility scenarios.
• Perform stationary and mobility testing under different network and RF conditions.
• Capture and analyze modem diagnostic logs using QXDM, QCAT and Shannon Logs.
• Use Wireshark for packet-level and IP protocol analysis where required.
• Analyze LTE/5G protocol call flows to identify abnormal modem or network behavior.
• Monitor RF and network parameters including RSRP, RSRQ, SINR, serving cell, PCI, throughput and network mode.
• Investigate registration, RRC, data connectivity, mobility, handover, VoLTE/VoNR, throughput and network recovery failures.
• Correlate modem logs, RRC/NAS signaling, RF conditions, packet traces and timestamps for failure analysis.
• Reproduce reported issues and collect required logs and technical evidence.
• Create defects with reproduction steps, expected/actual behavior, logs and technical observations.
• Work with modem, software and validation teams for issue debugging and resolution.
• Perform fix verification and regression testing after software/modem changes.

Test Engineer at Marquis Technologies (2021-05 – 2023-04)

LTE / 5G Device & Modem Testing

• Performed LTE and 5G NR device/modem testing and protocol validation.
• Executed validation for LTE, 5G NSA, 5G SA, VoLTE and data services.
• Validated network registration, LTE attach, 5G registration, cell selection/reselection, RRC procedures, mobility, handover, data connectivity and throughput.
• Performed RRC/NAS signaling and LTE/5G call-flow analysis.
• Analyzed modem behavior across PHY, MAC, RLC, PDCP, RRC and NAS.
• Captured and analyzed modem logs using QXDM and QCAT.
• Used Wireshark for packet analysis and protocol correlation.
• Investigated modem failures related to registration, connectivity, mobility, handover and throughput.
• Performed defect reproduction, log collection, failure analysis and regression validation.

RF Engineer at Integrated Wireless Solutions (2018-05 – 2021-04)

LTE RF Testing & Network Optimization

• Performed LTE RF drive testing and network optimization.
• Conducted coverage, mobility, throughput and signal-quality testing.
• Analyzed RSRP, RSRQ, SINR, throughput, dropped calls and handover performance.
• Identified coverage, mobility, interference and network-performance issues.
• Supported handover and RF optimization activities.
• Analyzed field logs and prepared network-performance reports.

ATP Engineer at JNET (2018-01 – 2018-04)

• Performed telecom site installation, commissioning and ATP testing.
• Validated RF parameters, network coverage, throughput and handover performance.
• Captured and analyzed field/drive-test logs.
• Supported RF and network troubleshooting activities.
• Coordinated with RF, transmission and network operations teams.

Bachelor of Technology (B.Tech) in Electronics & Telecommunication – College of Engineering and Management (2015)