Devendra Singh
Bengaluru
Summary
Working in HCL/ Mavenir DU team as LTE L1 troubleshooter for 2.5 years, previously worked in NEPC domain at Wipro technologies or 4 years. Involved in projects for RAN equipments of clients Ericsson, Nokia & Mavenir.
Completed BE from RV college of Engineering in Instrumentation tech.
Overview
6
6
years of professional experience
Work History
Project : Mavenir BBU
HCL Technologies
09.2021 - Current
- Part of LTE L1 troubleshoot team for deploying Mavenir's RAN solutions to field for various telecom operators across the globe
- Worked on Intel FlexRan 19.04 SDK modules for LTE PHY layer Ex- Scrambler, CRC decoder, Reed Mueller decoder for CSI, HARQ ACK/NACK confidence metric on PUCCH & Mux PUSCH
- Resolved 200+ issues reported from field as detailed below | High BLER issues | Throughput drops | UE connection failure, ERAB drop | Distributed Unit physical layer crash | RRU non radiation | Cell activation
- The above types of issues required steps - fixing the eNB & Cell configurations, Fixing bugs in shipped SW, identifying problem with L2, CU or RRUs and redirecting to appropriate teams
- Daily tasks - For the assigned Jiras, carried out log analysis on both eNB and UE logs from L1 prospective and provided the analysis & fix/ configuration fix as required.
Project : Ericsson RBS6402
Wipro Technologies
08.2017 - 08.2021
- Created Matlab models for 256 & 512 QAM with symbol error rate of 0.018 & 0.0262
- Created Matlab model for circular and star layout for QAM symbols to reduce inter symbol interference
- Coded adaptive modulation scheme based on target SINR
- Implemented troubleshoot commands to remotely collect logs from Ericsson PICO cell RBS 6402.
Project : Nokia Siemens Networks FTM
Wipro Technologies
- Built test procedures for routing protocols
- Contributed to feature RAN3496 to download & activate passive load or switch mode in FTIB card
- Created bash scripts to optimize memory space in FTIB for auto removal of old logs
- Created a log scrambling verification tool to verify that the data scrambled by customer's tool is matching the final output in logs for FTM cards
- Performed tasks - Unit testing, Protocol testing, Hardware integration, CI.
Project : Nokia Siemens Networks WFM & NFM-P
Wipro Technologies
- Created and executed the test plan for zero touch provisioning of 7250 IXR-E router.
Education
B.E - Instrumentation Technology
RV College of Engineering
07.2017
Skills
- C Programming
- LTE - Physical Layer
- Intel FlexRan L1, TestMac, TestApp
- UE logs - QCAT, XCAL/XCAP
- ENB L1 logs analysis
- MATLAB & Wireshark pcap analysis
- Unit testing
- Jira
- BitBucket
- Git
- GNU Octave
Position
Technical Lead - HCL Technologies
Timeline
Project : Mavenir BBU
HCL Technologies
09.2021 - Current
Project : Ericsson RBS6402
Wipro Technologies
08.2017 - 08.2021
Project : Nokia Siemens Networks FTM
Wipro Technologies
Project : Nokia Siemens Networks WFM & NFM-P
Wipro Technologies
B.E - Instrumentation Technology
RV College of Engineering
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