1. Prerna Gupta
Organization: Aricent July11-Present
Designation: Senior software engineer
4.11 years of IT experience in telecom domain in LTE.
Good knowledge of LTE end to end Call Flows.
Good understanding of NAS, S1ap, GTP and Diameter interfaces and 3GPP specifications.
Fair knowledge of LTE Enodeb L3 layer.
Worked in developing various features of LTE-MME and testing LTE core network nodes (MME,
SGW, PGW and HSS).
Implemented projects encompassing full Software Development Life Cycle (SDLC) including
requirement gathering and analysis, design, development, deployment, maintenance and
Delivered responsibilities as Programmer for Design, Development and Creating Test Plans.
Hands on experience in TCL/TK scripts for Automation of test cases.
A highly motivated, energetic individual and a team player with excellent interpersonal skills.
Strong communication skills while interacting with team and client.
Software Engineering High Level Design, Low Level Design, Coding, Unit
Testing, Bug Fixing and Support, Integration Testing,
Regression testing, Feature Testing, Performance testing.
Programming Language C, TCL/TK
Protocols and Technology NAS, S1AP, GTP, DIAMETER, SBC, TCP, UDP and
Operating Systems Linux (Programming Level) , Windows (User Level)
Tools GDB(Debugging), Wireshark, Valgrind, Bugzilla, Bullseye,
LTE EnodeB Layer 3 feature development and support
Description Worked on the feature development in layer 3 of LTE EnodeB. Provided
support for L3 issue raised during field testing done by Customer.
Contribution Performed requirement analysis and developed full design for load
Developed code for Load indication and stats in C.
Performed developer level testing and Integration testing.
Debugging and fixing of bugs raised during field and integration
Tools C, Wireshark, GDB.
Duration September 2015 to till present
Team size 12
Onsite and offshore support to Customer for EPC
Description Worked on a services project and given support to Customer for LTE-EPC.
Contribution Handling various issues raised by Customer on LTE-EPC.
End to end testing with EnodeB, LTE-EPC and real UE.
Made HLD and LLD design for adding a feature in LTE-MME node with
Have done implementation and testing of the above feature in LTE-
MME node with minimal guidance.
Tools C, Wireshark, GDB.
Duration April 2014 to August 2015
Team size 2
Performance testing of HAF and X2/S1 Handover and Customer Support in MME
Description Have done Performance/Stability Testing of MME for HAF feature and X2/S1
Handover procedure. This includes minimum time to replicate data from Active
MME to Standby MME and minimum switch over time if Active MME goes
Provided Support to various Customers of LTE-MME node and solved issues
for various features of LTE-MME node with quality.
Contribution Debugging and fixing of bugs raised during performance testing.
Provided Support to all the Customers of LTE-MME.
Solved various issues reported by Customers.
3. Tools C, Wireshark, GDB
Duration August 2013 to March 2014
Team size 6
Cell Broadcast Centre (CBC) and Operator/HSS based Subscriber Tracing (TSR) in MME
Description Cell Broadcast Centre (CBC) was a solution for the special requirement of an
Earthquake and Tsunami warning system (ETWS). It utilizes the existing
interfaces between UE and MME in control plane. Additionally the MME is
connected to the CBC via the SBc interface.
Subscriber tracing provides detailed information at the call level for the UE
(user). This is done to measure the performance of network elements as well as
the quality of services given to the user while using LTE network. Subscriber is
also traced on demand of the user itself if it is not getting the good or
appropriate quality of services from the LTE network. Operator can also trace
some of the random users to check the quality of network.
Contribution Performed requirement analysis and High level designing.
Participated in creating System integration Test Plan for the LTE-MME.
Responsible for coding and Testing of major modules.
Handling of Field Testing Issues, finding and fixing them.
Performed code Review.
Performed System Integration testing of complete system.
Tools C, Wireshark, GDB, Valgrind.
Duration September 2012 to July 2013
Team size 8
Emergency Calls and Closed Subscriber Group (CSG) in MME
Description The support for emergency calls is required across the network and UE. Any
UE can make an emergency call, provided network supports it. This means
there is no authentication required for UE to make emergency call.
Closed Subscriber Group identifies a group of subscribers who are permitted
to access one or more CSG cells of the PLMN.
Contribution Involved in every phase of Software development life cycle.
Developed code for emergency call and CSG in C.
Performed peer code review.
Effectively tracking of bugs and reporting to improve system stability,
excellent ability to notice, do research and report bugs and fixed them.
Provided support to system integration team and Customers.
Tools C, Wireshark, GDB, Valgrind
4. Duration Feb 2012 to August 2012
Team size 10
High Availability Factor (HAF) and Lawful interception (LI) in MME
Description High-availability in MME helps to ensure subscriber satisfaction and 99.999
percent system availability. There is a Standby MME node for every Active
MME and if Active one goes down then Standby takes the role of Active MME.
MME provides the whereabouts of UE to law enforcement monitoring facility.
Lawful Interception is a security process in which a service provider or network
operator collects and provides law enforcement officials with intercepted
communications of private individuals or organizations.
Contribution Performed requirement analysis and developed low level design.
Developed code for HAF and LI features of MME in C.
Preparation of Release Test Plan for the LTE-MME.
Performed developer level testing, Integration testing and Regression
Developed scripts in TCL to execute the test plan.
Participated in debugging and fixing of bugs raised during testing.
Tools C, gdb, Wireshark, Valgrind.
Duration July 2011 to Jan 2012
Team size 14
Automation Suite for LTE-MME during Job training
Description This is the project done during the Training program in Aricent. It is designed to
accelerate the time to test all the features that MME supports.
Contribution Involved in making TCL scripts used during Automation.
Involved in making framework for Automation suite.
Tools C, Wireshark, STATE tool
Duration Jan 2011 to June 2011
Team size 4
5. Achievements and Awards
Nominated in “Annual Awards” for the Rising Star Award category.
Received three Team Awards for high quality release for QY2011-2012 and QY2012-2013 from
Awarded “EXCELLENCE AWARD” in year 2012 for demonstrating high level of technical
competency and commitment during testing of IPV6 and HAF feature of LTE-MME 1.1 Release.
Degree/Diploma University/Institute Year of Passing Percentage/C
Master of Computer
I declare thatthe above mentioneddetailsare true tothe bestof myknowledge.