LTE Engineer Resume

SUMMARY

8+ years of experience in Telecom wireless product Testing and Validation across technologies like UMTS, LTE, IMS and WiFi for multiple network nodes like SGSN, MME and Combo (SGSN+MME), PCRF and SAEGW.
Work experience with Confidential (Redmond Labs, WA) as LTE Engineer
Work experience on Agile workflow.
Worked on multiple network interfaces i.e. S1, S11, S6, S5, S8, S2b, S10, S3, S4, SGs, Rx, Gx, Gy, Sy, Sd and Sp.
Worked on real device testing in Confidential &T Labs PCRF and SAEGW.
Knowledge on Packet and Voice Network protocols including NAS, S1AP, Diameter, GTP and SIP.
Good knowledge on the 3GPP specifications i.e. 23.401, 24.301, 25.413, 36.413, 23.060, 24.008, 29.060, 29.274, 29.272, 32.251

TECHNICAL SKILLS

Domain Knowledge: GPRS, UMTS, LTE, IMS, WLAN

Protocol Stack: NAS, GTP, Diameter, SIP

Hardware: Hitachi ATCA, Cisco ASR 5500 - StarOS

Knowledge on 3GPP Standard: 23.401, 24.301, 25.413, 23.060, 36.413,29.060, 29.274, 24.008, 32.251

SGSN/MME provisioning tool: CLI commands

Protocol Analyzer: WireShark

Automation Tool: CATT, ROBOT, Spirent Landslide

Scripting Languages: Perl

Version control system: SVN, CVS.

Bug tracking tools: Clarify, JIRA.

Test Tracking Tool: HP Quality Center

Other tools: WebCodec

PROFESSIONAL EXPERIENCE

Confidential

LTE Engineer

Responsibilities:

Preparation of test plan and functional testing for PCRF and SAEGW in real and simulated environments.
Real device testing for LTE, UMTS, IMS and WiFi networks.
PCRF Gx,Gy,Rx,Sy,Sp and Sd interface testing for Confidential &T’s subscriber types and billing records.
VoLTE audio, video and messaging functional call and feature flow validations.
Billing and CDR generation validation.
Traffic flow validation and troubleshooting.
WiFi call flow validation including call offloads during handovers.
PGW traffic handling and CDR validation for EPC.
Device test for calls with WiFi hotspot and tethering validation for General Motors’ VCP devices of connected cars.
BUG tracking through HP Quality Center.

Confidential

R&D Engineer

Responsibilities:

Preparation of test plan from the functional note and by referring NSN specification.
Automation of test case using ROBOT environment.
Functional testing of RACS in LTE mainly from eNB perspective for NSN Liquid Applications.
Debugging the issues using design log and wireshark log.
Prime ship on the product testing team
Tracking, reporting and issue resolution for Cloud Server node using JIRA

Confidential

Technology Analyst

Responsibilities:

The objective of this project was validation of Hitachi MME and SGSN against 3GPP specifications as reference. The interfaces tested are S1, S11, S6a, S6d, S10, S3, S13, S4, SGs and SIP. Some of the protocols involved were S1-AP, NAS, Diameter, GTP. Any product deficiency and deviations from 3GPP specifications are reported to design community and are tracked to Completion by way of retest and verification. Sanity and Regression is one of the important activities. Sanity is done when a new load comes on weekly basis and Regression every fortnight.
Preparation of test plan from the functional note and by referring 3GPP specification.
Automation of test case using Common Automation test environment.
Functional testing of 3GPP based features and customer focused features as well.
Verified the new functionality/messages supported on S3 interface (S4-SGSN and MME ) by executing interRat mobility testcases (LTE <-> UMTS,GPRS)
Debugging the issues using design log and wireshark log.
Bug tracking through HP QC and JIRA.
IOT for multiple vendors using vendor specific real nodes
Verified LTE EPC (MME) interaction with MSC network in circuit-switched domain via SGS interface using CSFB capable UE
Prime ship on the CR team to validate the fix and meet "Test Done" phase within stipulated time line.
Other tracks: Knowledge Management prime for KM activities.
Tracking, reporting and issue resolution for MME Regression, Sanity and Feature team.
Sanity and Regression for GPRS and UMTS networks.
Priming the Patcheck tool which automated sending mails to customer regarding information on Patch download
Developing and Bug fixing for tools.

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