Parameswara Rao Mandapaka
Email:paramesh.em@gmail.com
Mobile: +91
9966567858
H1B Receipt Number: WAC-15-143-50298
Validity Period:10/01/2015
to 08/31/2018
Career Focus:
To be associated with a progressive organization
that gives me exposure to key technology areas in the field of Wireless
Telecommunications.
Areas of
interest include LTE/LTE-A/5G testing of UE/eNB (Smallcells/Macrocells).
Professional Summary:
Over 9+ years of industry experience in wireless
telecommunications, which includes development and validation of wireless
telecommunication protocols and algorithms.
•Experience in functionality, stability &
feature testing of eNB protocol stack for Picocell (LTE-FDD)/Femtocell
(LTE-TDD).
•Worked in South Korea for LTE UE layer
1(Air-interface) testing with eNB
Simulators.
•Developed Physical layer scripts and testing the
same with test equipment (Anritsu-MD8430A Emulator, R&S Protocol
Tester-CMW 500 and Innowireless Test equipment’s) for LTE UE.
•Experience in End to End (Signaling and data
transfer tests) testing of LTE UE.
•Conversant with 3GPP LTE Layer 1/Layer 2/Layer 3
specifications.
•Experience in
UE conformance testing. (Ref Spec 36.521)
•Experience in Field testing (LTE throughput
tests and CSFB).
•Experience in Physical layer modules development
for WiMAX and LTE.
•Basic understanding of IMS Architecture and SIP
signaling.
Education:
B. Tech – Electronics &
communications score –
69.81%
June 2005
J.N.T. University (Nimra college of Engineering
& Technology) Hyderabad
Experience:
Lead Engineer
SmartPlayTechnologies (I) Pvt Ltd (Client:
QCOMM),
India
Oct 2014 to Oct 2015
Module Lead -Testing
BlueRose Technologies Pvt Ltd (Client: Airvana
networks), India Sep 2013 to Oct 2014
Senior software Engineer
Powerwave Technologies R&D Pvt Ltd –
Hyderabad,
India
Aug 2012 to May 2013
Lead Engineer
Sasken Communication Technologies Ltd –
Bangalore, India Apr 2011 to
Jul 2012
IT Analyst
Tata Consultancy Services Limited – Bangalore,
India
Sep 2010 to Feb 2011
Senior Software Engineer
Samsung India Software Operations Pvt Ltd -
Bangalore, India Apr 2008 to Aug 2010
Design Engineer
EmWiB Technologies Private Limited – Hyderabad,
India
Mar 2006 to April 2008
Projects:
1.LTE Femtocell
Network Listen module validation
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Description
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The key
objective of this activity is to validate Network Listen module of LTE
femtocell with third-party equipment’s (Aeroflex callbox) in QCOMM
LAB.Testing involves measuring signal power and reading system information
of configured neighbour cells.
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Environment
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Test Environment: Over the cable (OTC) setup
Simulator: eNB Simulator (Aeroflex callbox)
Mobile : Test mobile
(Qualcomm)
eNB :
Femtocell (Qualcomm)
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Software
tools
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QPST, QXDM,
Wireshark
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Responsibilities
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Main Tasks:
-Creating test cases for NL testing for
different bands based on feature update.
-Validation of network listen module for
various platforms in 3 stages
-Femtocell power on/During start
up
-Periodically after femtocell
power on
-UE attached to the femtocell and
UE connected mode
-Sanity testing for different releases
-Defect creating using JIRA and Tracking
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Duration
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Oct 2014 to
Oct 2015
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Team Size
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4
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2. LTE eNB
Protocol Stack validation (Picocell/Femtocell)
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Description
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The key
objective of this activity is validate LTE Femtocell protocol stack with
EPC (Core network) and Multiple UE’s in wireless environment. Testing
involves functionality, feature validation and End to End (UE to Server)
data transfer tests using iperf/VLC.
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Environment
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Test Environment: Over the air(OTA)setup
Simulator
: Polaris EPC/Harris EPC/Ercom EPC
eNB
: Powerwave Picocell/Airvana Femtocell
Mobile
: HTC 4G Mobiles/Samsung 4G Mobiles
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Software
tools
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QPST, QXDM,
Wireshark
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Responsibilities
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Main Tasks:
-Working as team lead for system testing team.
-Test cases preparation and documentation
-Performing sanity, feature and stability
tests.
-Creating Defect/bug ticket in JIRA
-Defect /bug tracking.
Sanity tests:
-Basic tests for every release which includes
signaling (attac/detach) tests and data transfer tests.
Feature tests:
-Paging, user inactivity, radio link failure,
admission control, Handovers/Mobility, ETWS/CMAS and s1Procedure etc.
Stability tests:
-Attach/detach loop tests, data transfer
(iperf) testing with various data rates, VLC and YouTube tests.
References:36.211,36.212,36.213,36.321,36.331.36.413
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Duration
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Aug 2012 to
Oct 2014
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Team Size
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5
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3.LTE eNB
protocol stack Physical layer validation
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Description
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The key
Objective of this activity is to validate LTE eNB Physical layer modules
with MATLAB simulated results. Testing involves physical layer channels and
procedures verification.
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Environment
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Layer 1 Module testing using MATLAB simulated
environment
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Software
tools
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IDE:
Freescale codewarrior (for MSC 8144)
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Responsibilities
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Main Tasks:
-Identification of test cases for LTE Physical
layer channels/procedures (RACH/cell search/PDSCH/PUSCH)
-Test Procedure document preparation
-Validation of the layer 1 stack using
developed test cases.
Reference: 36.201,36.211,36.212,36.213
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Duration
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Sep 2010 to
Feb 2011
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Team Size
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10
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4.LTE UE
Standalone Physical Layer Functional Testing
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Description
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The key
objective of this activity is to validate LTE UE physical layer with
third-party equipment in Samsung LAB Korea. In the initial stage (before
integration of the higher layers) and after integration with higher layers,
it is expected to validate the full functionality of the Physical layer.
Testing activity is in 3 phases, on FPGA board, ASIC board and Dongles
(Data cards). Interoperable testing is carried out with all equipment
vendors in all the phases of testing.
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Environment
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Test Environment: Over the cable(OTC) setup
Simulator: Anritsu Base Station (MD8430A),
R&S Protocol
Tester (CMW 500) and Innowireless signaling tester.
UE
: Samsung UE
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Software
tools
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Exposed Logging Tools:
-Samsung RmPC Logger, HLSP logger and Trace-32
Scripting Tools:
-Anritsu RTD
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Responsibilities
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Main Tasks:
-Identification of Layer 1 test cases
-Test Procedure document preparation
-Test cases development using C based scenarios
and generation of corresponding DLLs using Anritsu Simulator
-Validation of the stack using developed test
cases on each build releases on different signalling testers
(Anritsu/R&S/Innowireless)
-Regression/Performance testing
Physical Layer Procedures/channels Validated:
Synchronization procedure, Random access procedure, UE procedure for
receiving the physical downlink shared & control channels (PCFICH,
PHICH, PDCCH & PDSCH), Physical uplink shared & control channel
procedures (PUSCH & PCCCH). Downlink reference signals (RS), Uplink
reference signals (DMRS & SRS) and Uplink power control (PUCCH, PUSCH)
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Duration
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Jan 2009 to
Aug 2010, Location: South Korea
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Team Size
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4
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5.GSM
physical layer testing with Host test simulator
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Description
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Objective of
this activity is validate the part of GSM protocol stack (physical layer)
for MS. This setup is used to simulate Layer 1 field issues and regression
testing of GSM Layer 1.
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Environment
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Test simulator developed by organization
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Software
tools
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Source
Insight, clear Case.
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Responsibilities
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Main Tasks:
-Testing of physical layer modules with Host
test simulation setup.
-Regression testing of GSM Layer 1.
-Log analysis
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Duration
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Aug 2011-May
2012
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Team Size
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9
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6.Development
of DSP Software for SDR based LTE Modem
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Description
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The key
Objective of this activity is to design, develop and validate LTE protocol
stack for Samsung UE. Involved in implementation and validation of Physical
Layer Channel Equalization (LSE/LMMSE Algorithms) modules.
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Environment
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Sandblaster IE
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Software
tools
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IDE:
Sandblaster 6.3, MATLAB
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Responsibilities
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Main Tasks:
-Development (Fixed Point code)
-Optimization of numerically controlled
Oscillator (NCO/DCO),
-Channel Equalization for SISO, MIMO (2x2
Antenna case) Using LMMSE & LSE Equalization methods and Hard detector
(Slicer).
-Test
vectors generated using MATLAB and verified the above modules.
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Duration
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May 2008 to
Dec 2008
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Team Size
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8
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7. Implementation
of CPE for WiMAX 802.16d standard
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Description
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The key
Objective of this activity is to design, develop and validate WiMAX
protocol stack for EmWiB Technologies. Involved in implementation and
validation of Physical Layer transmission and Reception modules (Tx &
Rx chain).
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Environment
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Visual DSP++
IE
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Software
tools
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IDE: Visual
DSP++ 4.5 and MATLAB
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Responsibilities
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Main Tasks:
-Design, development
-Optimization of Randomizer, BTC (Block turbo
Coding),
Hamming Encoder/Decoder, Convolution
Encoder, Block
Interleaver/deinterleaver,
Mapping/Modulation using C.
-Channel Estimation Using Pilots in MATLAB
- Test vectors generated using MATLAB and
verified the above modules.
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Duration
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Mar 2006 to
Apr 2008
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Team Size
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6
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