·               CCNA

·               Network Topology: MSC, GMSC, MGW, eNB, MME, SGW, PGW, RNC, HSS, VLR, SGSN and GGSN

Work Experiences 

T-Mobile, Bellevue WA

IMS Service Design Engineer / Orchestra                                                                             11/2015-1/2016

-          Work with Service Design Engineers on Rich Communication Services Engineering (RCS)

-          Worked on platform involving IMS architecture – WIFI / VOLTE (IR92), IP messaging (RCS) and video calling(IR94)

-          Design of enhanced, robust and geo-redundant Text Messaging architecture in T-Mobile with Mitel/Mavenir/ Ericsson IMS Core network nodes

-          Design, Lab Testing/Validation, Performance Engineering, O&M or even Capacity Planning and Dimensions

AT&T, Redmond WA

Sr. Network Engineer (Virtualized Platforms)/ TechMahindra                                               05/2014-11/2015

·   Virtualized Platforms Implementations/ Configurations/ Testing

·   Extensive training / Experiences in Virtualizations ( SDNs, Network Function Virtualizations(NFV), Hypervisors, Hosts, VMs)

·   MSPs and vMSP experience on to provide support for Ericsson's MSP running on HP C7000 Chassis. 
• Deployed MSP VMs for connected car project and Lead the testing team on Virtualized Proxy (VMSP) which supports port 80 traffic in connected car ASE/Sundance Projects

• Integration, Testing, Verification and Software upgrade of Ericsson’s Multi Server Proxy (MSP) Solution in AT&T’s Core Network for optimizing HTTP, MMS and video traffic.
• Providing 3gpp Sd interface consultation for AT&T's project to add traffic detection function on MSP. 
• Performed configuration, testing and troubleshooting for VM based and bear metal MSP deployment.
• Solution deployment and implementation was done on various Servers running on Linux
• Configured network interfaces, routes, DNS, DNAT, NTP and SNMP on traffic servers and VLAN on network switches.
• Performed troubleshooting of networking issues in MSP system using tools like tcpdump, traceroute, netstat, nslookup and SQL queries

·   Specialized on MSPs SEA Gateways PCRFs/PCEFs SDGs Features Implementation and Testing for Enterprise Neo Zone (Services Zone) and Calico Zone (Support Zone).

·   SEA Gateways Software Update/Downgrade for all blades and New Feature implementation testing.

·   SEA Gateways/PCRF/ePDG Features/Interfaces testing focus on Volte and Wifi Calling.

·   Analyzes IMS for Volte call completion (P-CSCF, I-CSCF, S-CSCF, MGCF and BGCF) 

·   Analyzes use of TLS (SIP) used on port 5061 

·   Reviewed SIP messages for 4G calls: 401, 409, 403, 200,100, 180,183, PRACK, Cancel, Notify, Subscribe, etc. 
Uses RTP, SDP, RTCP, and SIP on Volte test cases 

·   Investigates traces with TCP, UDP, SCTP, IP, S1AP,GTPv2 and Diameter 

·   Analyzes test cases with GTP-C, GTP-U, and GTP 

·   Reviewed Codecs of RTP for IMS 4G SIP call sessions and Identified different Default and dedicated bearers 

·   Testing ePDG, PGW and the Entitlement server and Network Testing 

·    Testing and troubleshooting of SES interfaces towards AAA, MIND (SPR), CPS and Notification server. 

·   APNs Route testing for Enterprise customers

·   LTE/4G EPC Test designing and Network Implementation 

·   WIFI / VOLTE (IR92), IP messaging (RCS) and video calling(IR94)

·  Worked on call flows involving IMS architecture - VOLTE & VoWiFi

·   Developed Pure Load Test/IXIA/Landslide/ Bash-Shell Scripts to simulate the handset to test the call flow for all the interfaces, captured/ analyzed PCAPs

·   Installing, Configuring and Troubleshooting LTE SAE Gateways, Juniper Firewalls and Cisco Routers

·   Troubleshooting of hardware/software platforms/applications and EPC Network core, distribution and access layers.

·   Support role for SGNS-MME IPv4 and IPv6 packet core validation Special focus on S1-MME and S11 interface

·   Created and executed Test cases (Test Object List) on ALU MME 9471( LM 4.05 / LM5.01), Ericsson MME MKVI+E// 2G GN and 3G S4 SGSN, NSN 2G and 3G S4 SGSN for IPv6 Baseline , Compliance , Performance , Resiliency and Regression, IRATs, Handovers, QoS, Legal Interception, Load Testing, VoLTE, Quality of Service (QoS), Legal Interception TOL 

·    Monitored traffic captured and analyzed traces on JDSU Signaling Analyzer and IRIS Tecktronics probe. 

·   Help to tested MME S1 and S11 interfaces using Packet Storm IP network Emulator 

·   Testing Layer2 and Layer3 protocols like BGP, OSPF, MPLS using commercially available Test tools.

·   Testing for all phases like Unit, Integration, IOT, Feature, Performance and Services ( TC1-TC5)

·   Testing GTP V2C, GTP V1U, GTP Prime , Diameter, SIP & NAS protocols

·   Testing LTE interfaces like S1-U, S11-MME, S8,S5,Gx and SGI interfaces

·   Developing Manual Test Scripts and Automation Scripts using IXIA ,landslide and Bash/Shell Scripting

·   Policy Control Solution- PCRF, SPR, PCEF (GGSN, PGW, DPI) 

·   Cisco Quantum solution (Policy Control-PCC for mobile and fix and SP-WiFi) and Cisco (Starent) mobile packet core(ASR5000)

·   Interfaces-Gx, Gy, Sp/Sh, LDAP, Ud, Rx, Sy, SMPP, Soap HTTP, Radius etc.

·   IP Service Control Portfolio (Cisco & Juniper- Switching-Routing)

Tools: IXIA, LandSlide Spirent, JDSU, Wireshark, X-shell, Quality Center,IRIS,Ngenious,vSphere Esxi( Hypervisor) VCenter( Vm’s Mangers), Netscout,CLI Commands,Bash/Shell Scripting ,Mobile Experience (ME).iTest (Spirent)

Microsoft, Redmond WA

  SDET: Protocol (GCF) Certification Test Engineer/ Consultant.                                         06/2013-02/2014

· Assigned to support the new Windows phone software (OS) development and debugging for GCF certification (I/TS-36.523) using R&S and Spirent racks to make sure new Software releases could pass all the GCF protocol test requirements according to 3gpp/3gpp2 specification before sending the final product to GCF lab for approval. Testing involved many core chips design and many software releases

· Specialized in GCF/ SFN / Lab Conformance LTE protocol testing for UE lab conformance stage using R&S Involved many core chips design and many software releases.

·Assigned to conduct the GPS’s LPTS (CDMA) and LBS (Supl-1/SUPL-2/OMA/OTDOA) test activities (using Spirent).

·   Worked on implementation of different cellular technology including CDMA2000 1X, CDMA2000 EVDO, UMTS, and LTE-Advanced Integration between Hardware and Software (Release 9 /10 and 11).  I worked on other wireless technology including VOLTE, WiFi IEEE 802.11ac and Bluetooth.

Tools: QXDM, QPST, Product Studio,Litepoint IQXel Rohde & Schwarz (CMW 500 Wideband Radio Communication Tester, CMW CU-Control Unit), Anritsu (MD 8475A, MS2830A, MT8820C), Spirent (B750, 8100 Location Test, 4556700 GPS E2010S LTE SR 34700 WCDMA SR345 EV-DO PTDE), Anite SAS Protocol Analyzer

 Jasper Wireless, Seattle, WA                                                                                                                                03/2013 – 06/2013

  Quality Protocol Engineer

·   Test platform to enable network operators to quickly and efficiently service the M2M market, and for their M2M customers to optimally run their connected device businesses.

·   Test execution and presentation of organized results to capture software issues, defect using tracking tools

·   Automated testing of software systems for web and web services applications.

·   White/gray box test plans for API (Application Programming Interface), Web app and smart phone device testing for LTE network nodes( HLR, HS-SGSN etc.), billing process, backend, Failover, UI test development using  tools and technologies.

·    Analysis of interfaces Protocol  and call flows between HSS, AAA, SGSN,GGSN, and IMS nodes.

·   Responsible for testing User Experience, BT/RF, Bluetooth, WiFi Calling, DLNA, Memory card and Visual voicemail.

·   Worked Product Validation, Inter-Operability Test and Acceptance Testing.

·   Established track record of automated testing of software systems for web and web services applications

·   Determination of given Pass/Fail criteria based upon test execution..

·   Work closely with Quality and Development teams.

·   Selenium, Ap test Manger and HLR immigrations using JAVA

                    Tools: Quality Center, HLR Tekelec SIM provisioning  , WireSharK, Control Center

Intel Mobile Communication, Seattle, WA                                                                           05/2012 –03/2013

Verification Test Engineer

·   Interoperability testing ( IOT)  issue (bug) replication (reproduction) in lab Networks Simulator and Field using Test Tool

·   Tested XMM™ Dual-Core chipset family( XMM 6260, XMM6360&XMM 7360 )on mobile Network (LTE, UMTS & GSM)

·   Analysis and debugging during interoperability testing (IOT) of UMTS and LTE terminals and prototype with customer infrastructure AT&T and T-Mobile using AT Council Commander.

·   KPI testing  for Releases (Release 6,7,8,9 & Cat 10, Cat 14,Cat24), feature testing in CPC  and Non-CPC Testing for T-Mobile, Rx-Diversity, ADAPT for AT&T, Regression testing for AT&T operator at different cities across US.

·   Using Filezilla and Total Commander for FTP Downlink and Uplink (Package tracing).

·   Test the Protocol Stack, circuit switch and packet switch, handover of 2G, 3G and LTE handsets with different carriers.

·   Perform Release Verification, Regression, Reliability, KPI and Sanity Tests on Daily Software Releases

·   Determination of given Pass / Fail criteria based upon test execution and analysis of layer1, 2, 3 messages

·   Flashing and Flexing of new software (Engineering Build)on Mobile phones 

·   Perform static, field and lab testing.

·   Analyzing logs and identifies bugs “Coredumps” and crashers with associated SMS (CR’s) and provides report to clients for test results on a daily basis.

·   Using UTP (Unified Tracking Platform) identify, report modifies crashes and raises a new SMS as needed.

·   Analyzing test results, finding and reporting defects and opening CR to track and resolve them.

·   Provide logs to the Back Office (BO) for further analysis and used crashed result to develop build and better functionality for the DUT (Device under Test “Handset”).

·   Travelled to various locations in the US to verify CR’s.

·   Provide excellent Customer Support in reproducing various critical issues in the market like Call Drops and NAS stuck issues.

·   Participate plan, prepare and support 3GPP certification and conformance activities.

·   IOT test execution for branded, non-branded, M2M, Open Development, Chipset Certification and development projects.

·   Help develop RF profiles to simulate various iRAT transitions to represent various field scenarios 

·   Provide input for improvements in lab functionality, test automation, training, and lab maintenance procedures

·   Debugs lab issues and special assignments as needed.

·   Fault and configuration management and Testing Follow-up reporting to Project stakeholders

·   Setting up of test environment and test data, defining test scripts including execution steps, test execution and verification of results, Volume testing and performance testing .

·   Reporting of current test status (including time to complete), raising, monitoring and re-testing errors, planning, fault management and Training the team on my expert areas through Net meeting  

Tools  Intel Phone Tool V134, Flash Tool V4.98.3.59, Mobile Analyzer (Layer2 and Layer3 Tracing tool) V12.10, Artemis (3G Firmware Tracing) V12.08.00, ISTP V12.03, Total Commander ,Crash Inspect V2.36, Filezilla V3.5.2, Comneon Drivers V3.33, UTP (Unified Tracking Platform) Anite , Agilent Rohde & Schwarz CMU 200, Anritsu MT8852B and Telnet. Training:    - Extensive Training with Intel Mobile Communication in Call performances, DUT (Device under Test “handset”) crashes using different software’s such as Gladiator Software, and ADOP Training for AT&T (Allentown, Pennsylvania)

 MobileComm Professionals. Inc, Dallas, TX                                                                           01/ 2010- 05/2012

 Associate RF Engineer       

·                        Performing Drive Test & basic Optimization for GSM /UMTS /LTE wireless data networks applications and simulators.

·                        Comprehend and follow testing procedures for UMTS & GSM networks in the areas of Voice, SMS & Data Services for AT&T and T-Mobile.

·                        Analysis for Call Drop and Call Setup Failure through processing of Log Files.

·                        Basic neighbor’s optimizations, TCH Blocking, Drop call rate, Handover failure ratio.

·                        Basic optimizing RF related parameters and analyzing Drive log files, site data and signal propagation measurement and KPI traffic, and communicates test results to Senior RF engineers.

·                        Basic neighbors list analysis, Interference and Coverage Analysis and suggest for changes to be made in network to optimize the given network as to minimize coverage holes & interference.

·                        Basic initial tuning of the network and pre-launch optimization and testing with Ericsson & Nokia Siemens Network Engineers.

·                        Professional map Geo-Coding for in-building RF testing using MapInfo and Google Earth.

·                        Testing and monitoring new DAS functionality before and after events.

·                         GPS testing through data collections for accurate positioning that include E911 using handsets and softwares.

·                        Engine and Application Tests on mobile phones LTE IOT EUTRAN (Email, Video streaming, MMS, IM, WAP), UMTS UTRAN Protocols HSDPA, GSM/GPRS/EDGE, SIP/UMA, APN, VPN working with EPC and RAN team.

·                        Performing GCF (DG11), CS and PS performance testing with regular drive test sessions. 

·                        Key Performance Indicators (KPI) tests to assess handsets minimum call and battery performance level on live network. 

·                        LTE stationary test using iperf command for site Shakedown.

·                        Strong knowledge of LTE  IOT (TT-CN3) protocols and interfaces such as MME, HSS,S-GW,P-GW, S6a, S6b, S10, S11, S5

·                         3G Surveys (RSCP/EcNo Voice)

·                        HSPA Surveys ( HSDPA, HSUPA)

·                        2G Surveys (RxLev/RxQual Voice, GPRS, EDGE)

·                        Provide live feedback on all failures (Drops, blocks, values)

·                        Site acceptance surveys & reports (Cross-connection, Azimuth, Overshooting, Drop, Block)

·                        Handling positioning systems devices GPS’s & AVT systems (MapInfo, MS Street and Trips)

·                        Understanding the readings of link parameters Uplink, Downlink, CINR, RSSI, modulations & data throughput.

·                        Strong Knowledge of telecomm (2G/3G/4G )and computer network layers and protocols such as physical , transport ,Layer 3 (RRC) + TCP/IP and UDP, MPLS, APN, PPP, VRRP, HSRP, OSPF, BGP and SNMP protocols

                            Tools Tems  /Agilent /Actix /Map info/MS Street Trips