Summary
Overview
Work History
Education
Skills
Timeline
Generic

Charankumar Pachipala

Kirkland,WA

Summary

7+ years of experience in telecommunication industry with testing, identification and analysis of wireless voice, data network, Messaging and video calling.

Experience with testing using testing tools like Net scout, Tektronix, spirent, IXIA, Keysight

Experience with tools like Wireshark, QCAT, iCAN, CLA for network and device log analysis.

Create test plans by understanding the design requirements and writing test cases, interpreting product specifications, and debugging failures

Expertise in Preparing, maintaining & modifying the Test Bed for various regressions, Functionality Testing. Experience in testing of LTE Modems using Linux and Unix Operating systems.

Worked on RF Calibration setup and testing of LTE Modem setup Experience working with MQTT protocol and Apache Kafka and HiveMQ broker for IoT Support Experience working on KPI testing, Uplink, Downlink of Data and short,long calls using AT Commands Good knowledge on the call flow in different network layers like RRC, NAS, Application layer etc.

Overview

7
7
years of professional experience

Work History

Systems Engineer

RM Technotree.Inc, AT & T Mobility & Wireless
06.2021 - Current
  • Worked with simulation tools like dsTest, Landslide, Ixia for supporting testing the network in the lab
  • Worked with VmWare to create and maintain lab VM’s for different nodes and supporting automation testing on MME and 5G
  • Worked with dsTest for spinning up VMs and also creating new sites for integrating new features on to the Lab network
  • Worked with dsTest integration to the Lab network VMs for different nodes supporting load testing using automated scenarios
  • Worked with creating routing to the VMs and performing End to end connectivity on the simulation tools
  • Worked with TED(Technical Evaluation Document) for planning the servers that need to be installed and provides the technical details to LabOps for installation
  • Worked on scripting test cases for PCF , OCS and DNS in EPC for performing Load testing and wrap around testing using dsTest tool
  • Create routing and installing network interfaces as well as checking the network routes for bare metal servers used for dsTest
  • Integrating dsTest VM’s for eMBMS functional and wrap around testing
  • Preparing dsTest environment for generating simulation for load testing on OCS and PCRF nodes and NorthRIM(5GC)
  • Worked on Troubleshooting Hardware issues for HP and Dell servers and setting up standalone servers for KVM environment
  • Worked on eMBMS requirements for dstest tool to develop scripts for load testing
  • Worked on Migrating vmware environment to standalone KVM servers and installing VM’s
  • Troubleshooting issues with VM’s in VMware Environment and supporting team by upgrading VM’s to new OS versions and also troubleshooting Network and Hypervisor issues
  • Have Troubleshooting experience with ESXi host crashes and finding the RCA for the crash
  • Troubleshooting the system errors for the Lab failures and SIMTools servers in the daily testing
  • Worked on maintaining the daily license usage of dsTest in the Lab and also creating webservers for the SIMTools for customers to reach webservers.

Systems Engineer

RM Technotree.Inc, AT & T Mobility & Wireless
04.2021 - 06.2021
  • Worked with Implementation Engineers to evaluate lab readiness for new services deployed
  • Worked with Technical Evaluation Document(TED) to make upgrades in the lab and provide technical information for equipment used in the lab
  • Worked with getting requirements from clients and worked with replacing servers, switches and performing connectivity, routing
  • Conducted meetings to Complete TED documents providing all the requirements for several projects
  • Performed TED reviews in LabOps team by analyzing the lab environment on D1 in multiple lab environment
  • Worked on iTrack JIRA environment to update and close tickets in Lab environment

LTE/Wi-Fi Test Engineer

RM Technotree.Inc, Microsoft Corporation
02.2021 - 04.2021
  • Performed testing using CMW500, Anritsu tester MT8820 to test 3GPP specifications, carrier and internal requirements
  • Performed device preparation (loading right bits/tools/software/firmware) for official laboratory testing and also performing sanity before the software availability to team for testing
  • Have experience using RFCal Tool, QXDM, QPST, QCAT and QRCT for testing the device parameters
  • Experience with cellular test equipments like CMW500/Anritsu and also automation tools like JCox for testing and analyzing the output values

LTE Test Engineer

RM Technotree.Inc L&T Technology Services
12.2018 - 01.2021
  • Worked with LTE devices by testing and collecting logs for issues produced in lab and production
  • Analyzing Call Flows using wireshark and finding the root cause creating the issues
  • Worked with IMS [IP Multimedia Subsystem] testing IR92 calls, IR 94 calls, and SMS over IP on SIP Protocol
  • Worked with MQTT protocol to generate IoT protocol in sequence
  • Worked with RRC, NAS, GTP & S1AP, SIP & DIAMETER protocols for E2E testing of EPC and IMS scenarios
  • Worked with Apache Kafka and HiveMQ broker for IoT Support to execute the MQTT protocol and to communicate with the network

Lab Integration Engineer

RM Technotree.Inc, AT & T Mobility & Wireless
08.2018 - 10.2018
  • Created E2E LTE/VoLTE/IR-94 Lab Network Architecture, Design, Strategy, Development, Solutions, Site Engineering, Systems Integration and Implementation of Real Time Communication systems including VoLTE(IR-92), VoVideo(IR-94) and VoWiFi
  • Contributed in writing Lab JRD, NDR and LEP documents for the nextgen technology projects like, vEPDG, vMOG, LTE, VoLTE, Video-over-LTE, VoWiFi, IP Messaging, IoT, and Mobility Cloud Virtualization Solutions implementation in the Mobility labs
  • Developed new routing for the current lab and integrating new interfaces like s2b, s6b etc and adding the new network elements like ACS, SFCS, PAS etc to the current lab network
  • Performed End to End integration of lab and prepare integration plan and Lab Engineering Plan(LEP) for the new interfaces that are added to network
  • Developed E2E Call Flows and test cases for key service flows based on Network Architecture, and Standard Bodies such as 3GPP, ITU-T, IETF, OMA, etc

LTE Modem Test Engineer

L&T Technology services, Intel Corporation
02.2018 - 08.2018
  • Worked on Functional Testing on XMM 7420 LTE Modem with different RF engines and different base boards
  • Worked on Audio Extraction and Post processing of the logs and find the call setup time and POLQA scores for all different calls like 4G_VoLTE, 3G, Long calls, short calls CSFB etc
  • Worked in different testing conditions like Mixed Mobility, Marginal Mobility, Near cell and Far Cell test cases and calculate Throughput for 4G and 3G Data testing
  • Worked using AT commands to do all the functionalities of the modem
  • Experience in working with DUT, CDUT and reference and compare the throughput and calls scenarios at different RSRP and different testing conditions
  • Worked on Calibrating the LTE Chipsets to different RF Transmitter and Receiver frequencies using different Calibration tools
  • Worked on functional and KPI testing for different operators like AT&T, TMobile, Verizon, US Cellular, Cspire.

LTE Test Engineer

SRITech Solutions.Inc, SriTech Solutions. Inc, AT & T Mobility & Wireless
07.2016 - 02.2018
  • Worked on Wi-Fi calling, VoLTE calling, SMS over IP, IPME SMS, vCTS failover testing, device testing and platform testing
  • Worked testing MaaP(Message as a Platform) project which is a new application to communicate with Bot technology when the bots are online
  • Worked on vCSCF node testing which involves routing the calls through vCSCF rather than physical CSCF which makes the network virtualized
  • Worked on Reseller VoLTE and WiFi project and vCTS regression testing and production testing
  • Worked for FirstNet project to provide services during the emergencies with a separate Bandwidth and a specific call functions
  • Worked on different VNF’s in vCTS failover testing like SPFE, UDR PX and UDR BE
  • Worked on UT transactions and verified the call flows for UT transactions
  • Worked on Wi-Fi security project to test different scenarios on connecting to secure Wi-Fi
  • Worked on WPS (Wireless priority Services) preemption project which deals with the preemption services of a ENodeB when there are any emergency services

Certified Network

Cisco
  • Associate (CCNA) routing and switching.

Education

Master’s - Electrical Engineering

Lamar University
Beaumont, TX
12.2015

Bachelor of Technology - Electronics and Communication Engineering

JNT University
Andhra Pradesh
05.2014

Skills

  • Mobile OS IOS, Android, windows
  • Operating Systems Windows, Unix, Linux
  • Tools/Software Wireshark, MATLAB, Bugzilla, IRIS, , JDSU, QPST, QXDM, iNET Controller, CLA, iCAN, CMW500, Keysight, Spirent , IXIA,dsTest
  • Protocols TCP/IP, SIP, UDP, OSPF, FTP, XCAP, Diameter
  • Platform Management, KVM, vMware

Timeline

Systems Engineer

RM Technotree.Inc, AT & T Mobility & Wireless
06.2021 - Current

Systems Engineer

RM Technotree.Inc, AT & T Mobility & Wireless
04.2021 - 06.2021

LTE/Wi-Fi Test Engineer

RM Technotree.Inc, Microsoft Corporation
02.2021 - 04.2021

LTE Test Engineer

RM Technotree.Inc L&T Technology Services
12.2018 - 01.2021

Lab Integration Engineer

RM Technotree.Inc, AT & T Mobility & Wireless
08.2018 - 10.2018

LTE Modem Test Engineer

L&T Technology services, Intel Corporation
02.2018 - 08.2018

LTE Test Engineer

SRITech Solutions.Inc, SriTech Solutions. Inc, AT & T Mobility & Wireless
07.2016 - 02.2018

Certified Network

Cisco

Master’s - Electrical Engineering

Lamar University

Bachelor of Technology - Electronics and Communication Engineering

JNT University

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Charankumar Pachipala