G.V. Sagar

ac9564@r.postjobfree.com +91-897******* Skype(sagar.gv1)

Academics:

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY Hyderabad, AP, India

Bachelor of Engineering in Electronics and Communications May 2007

Professional Summary:

LTE/VoLTE: Good and working knowledge of LTE Architecture & IMS architecture, interfaces (LTE -Uu, X2, S1-MME, S1-U, S4, S5, S8, S11, RX, GX, Mw), protocols (PHY, RRC, MAC, RLC, PDCP,NAS,S1AP, X2AP, GTPv2,DIAMETER, SIP, RTP) and call flows

Good knowledge on conformance tests (36.523 &36521)

UMTS/WCDMA: Good and working channels and call flow scenarios

End to End system testing: Excellent technical skills in validation and system testing of UMTS RAN & LTE/VoLTE in End to End using devices as well as simulators

Performance testing: Excellent hands-on experience on UMTS RNC capacity testing for ALU RNC.

Wireless Tool Expertise: Expert in usage of tools such as QXDM, QCAT, QPST, ANRITSU: MD8430A, Polaris (EPC simulator),TM500(Viavi), JDSU (EPC protocol analyzer), IRIS View (IMS/SIP Call flow), NetScout & Wireshark, Polaris EPC simulator

Troubleshooting Expertise: Excellent troubleshooting and problems solving skills at lab configuration issues and Call failures.

Scripting: Basic knowledge on Python and little hand on experience on modifying scripts as per the test requirements.

Test Case Design: Expertise in preparing test cases bases on the test requirements.

Operating systems : Windows /Linux

Flexible, proactive and effective communicator with proven ability to build strong working relationships

Work Experience:

Radisys India Pvt Ltd ( Bangalore) 28-May-2019-Till date

Project : Cisco CBSD ( LTE Small Cell) System Verification Testing

Role : Lead Engineer

Tools : QXDM, QCAT,Polaris EPC,TM500,JIRA

Domain : LTE

Protocol : PHY,MAC,RLC,PDCP,RRC,NAS,X2AP,S1AP,GTP-U

Test Area : small cell

Analysis and troubleshooting of LTE log failures as part of System verification Testing.

Execution of Test cases like Attach(single/multi) UE,Throughput verification,X2HO and S1 HO.

Performing call admission control tests, board bringup and configuring setup as per the test requirement.

Performing bug tracking and working closely with the design team.

Preparing test suite and prepare test scripts using TM500

LnT Techservices (Bangalore) 11-June-2018– 27-May-2019

Project : LTE/VoLTE log analysis and code verification

Client : Sony,Japan

Role : Project lead

Tools : QXDM, QCAT,CMW Marsviewer

Domain : LTE,IMS, VoLTE

Protocol : PHY,MAC,RLC,PDCP,RRC,NAS,SIP,RTP

Test Area : Modem (SDM845,855)

Analysis and troubleshooting of LTE, Volte, log failures from different operators across the world.

Analyze the UE and TE (Test Equipment) logs for test cases failures reported by the Customers during Carrier acceptance testing.

Good Troubleshooting skills among all LTE, Volte protocols.

Good knowledge on PHY,MAC,RLC,RRC,NAS,SIP,RTP protocols

Performed code integration as part of bug fixing for configuration issues.

Good knowledge on Qualcomm chipset MCFG/MBN configurations, and QMI,call manager,dataservices,policy manager,WMS modules.

Have good hands on experience on QXDM, QCAT, CMW marsviewer tools

Aricent (Hyderabad) July 2015– 6-June-2018

Project : LTE/VoLTE/Vowifi/WCDMA Modem Stability Testing

Client : Qualcomm, Hyderabad

Role : Lead Engineer

Tools : QXDM, QCAT, R&S,Anritsu MD8430A,

Domain : LTE, 3G, IMS, VoLTE

Protocol : RRC, NAS, SIP,RLC,PDCP,MAC,PHY

Test Area : Modem

Responsibilities:

Executing test cases LTE Attach, Browsing, Cell Selection & Reselection, Throughput testing (Till Cat7), IRAT (4G to 3G), CSFB, X2 HO,Volte,Registration,SRVCC, supplementary services Modem Reset and mobile applications for longer duration to ensure the stability and availability of the modem

Analysis of VOLTE/LTE Call failures for Field Testing and in lab as part of regression testing

Verified Carrier aggregation features with 3 DLCA, with 2x2 MIMO feature and CDRX feature.

Setting up the test environment, creating test scenarios using android CTA tool XML files.

Reproduction customer issues in lab environment

Performing stability Testing for different Modem releases of Qualcomm like 8952,8976,8940,9607,9206

Bug tracking with PRISM & Jira tool and interacting with design team for closing the defects soon.

Tech Mahindra Limited (Bangalore) July 2013 -July 2015

Project : LTE/VoLTE System Integration Testing

Role : Lead Engineer

Client : AT&T U.S.A (Redmond)

Domain : LTE, 3G, IMS, VoLTE

Test Area : End to End

Responsibilities:

As part of regression testing executing LTE test cases Attach, Detach, TAU, Browsing, X2 HO, S1HO, CSFB &VoLTE test cases like IMS registration, De-registration, 4G to 4G voice call, M2L, 4G to 3G, 3G to 4G, call forwarding, call waiting, Conference call in E2E AT&T LTE/IMS network LAB

Analysis off End to End VoLTE call failure logs (SIP,S1AP,GTPv2,DIAMETER,RRC,MAC,PDCP,PHY,X2AP) as part of Chicago & Minneapolis field drive tests.

Test design/strategy and preparation of test cases for the LTE-EPC network and for the VoLTE scenarios.

Prepared test plan and executed various End to End VoLTE features like IR94 video calling & Vowifi call flows.

Performed Bug tracking and bug reporting on LTE/VoLTE elements using HPQC.

Expertise in handling tools like JDSU, IRIS and Wireshark.

L&T InfoTech Limited (Bangalore) August 2012 – July 2013

Project : WCDMA RAN System Integration Testing

Client : SAMSUNG, South Korea

Work Loc : Bangalore/Suwon (South Korea)

Role : Senior Software Engineer

Domain : WCDMA, UMTS

Responsibilities:

Interact with design team on issues, provide daily status updates on test progress/issues

Preparation of the High Level and Detailed Test Case Design for system testing scenarios.

Validate call flow, all mobility scenarios till Release 7(CS, PS and Handovers, IRAT, LAU, RAU etc.)

Execute system related cases like lock/reset the boards to check the stability of RNC and NODEB.

Verified RRC state transitions and the message flows during call tests using QXDM .

Verified 3gpp features like Fast dormancy support, CPC and Dual Cell HSDPA.

Performing Bug tracking and bug reporting on issues using Clear Quest.

Aricent Group (Bangalore)

Project : RNC Capacity Integration Testing June 2009 to August 2012

Client : Alcatel-Lucent, Ottawa (Canada)

Work Loc : Bangalore

Role : Senior software Engineer.

Domain : WCDMA, UMTS

Responsibilities:

Verified ALU RNC under capacity environment w.r.t different traffic profiles.

Tested RNC under high traffic load conditions and verified the KPI’s as per the test objects to validate the stability and availability of the system.

Preparation of the High Level and Detailed Test Case Design for capacity stress testing.

Configured different type of RNC’s such as ATM, IP and Hybrid as per the test requirement.

Interact with design team on issues, provide daily status updates on test progress/issues

Performing Bug tracking and bug reporting on issues using DCT and Quality center.

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