PROFESSIONAL SUMMARY:

• 15 years of Telecom/ IT Experience in architecture, design (system and application), development, testing, simulation and performance analysis for wireless networks (LTE, WiMax, EvDo, CDMA), embedded systems, networking and application domain.
• Extensive experience in the field of Telecom/Networking and Government services domain.
• Played several key roles including Designer, Architect, Team Lead, senior system dev specialist and independent contributor.
• Expertise in Object oriented programming, Network security (authentication and authorization), MAC layer algorithms, EPC (Evolved packet core), schedulers, QoS for LTE and WiMax.
• Broad experience in commercial software architecture, development and deployment.
• Iterative development to fully understand customer needs and build the best possible solution on schedule and on budget
• Well versed with entire project lifecycle (initiate, plan, execute, monitor & control, close).
• Strong C/C++ programming experience under UNIX, LINUX, VxWorks (RTOS) and Windows.
• Proficient in TCP/IP protocol stack and socket programming.
• Well versed with TCP/IP protocols - conducted performance analysis for various TCP algorithms for wireless networks to optimize it for high and speed data services.
• Manage project risks and issues; facilitate regular project status meetings; document and communicate key project decisions; provide weekly status reports to Management; effectively manage scope and change control, effort estimation.
• Primary responsibilities include architecture, design and development of commercial software products and custom software solutions, as well as day-to-day business operations. Development is in C++/C.
• Review technical documentation to verify compliance with client requirements and established architectural standards and guidelines.
• Ability to translate functional requirements into technical terms relevant to the application to coordinate and assist with the detailed technical design tasks
• Ability to learn quickly customer IT Architecture, and then combine problem solving skills and relationships to create business opportunities.
• Extensive experience for Mix traffic (data and real time traffic) schedulers, End to End QoS, inter and Intra user QoS Scheduler for LTE, WiMax, CDMA, 1x EvDo rev 0 and Rev A technologies.
• Expert level embedded RTOS development experience using VxWorks and PoS Embedded solution using Veifone Verix Vx .
• Have expertise in Object Oriented Analysis and Design (using Describe and GDPro tool based on UML).
• Experienced with Unit, Designer, Regression and Integration Testing.

TECHNICAL SKILLS:

PROGRAMMING: C++, C, MySQL, UML and VC++

TELECOM / Embedded/NETWORKING: Device Identity (authentication/authorization), PoS Embedded development, Verix Vx, LTE, Biometric MSO300, WiMAX, 1xEvDO, CDMA 1xRTT, VoIP, WLL, Call processing, PDSN, CTI, IVRS, MFPA, socket programming, IPC and multithreading

TOOLS: Describe(UML Tool), RTC, OPNET simulator, H.323 RADVision Protocol stack, Sniff, Greenhills, ODBC, GreenHills MULTI, Clearcase, Gdpro, Prostar, RTM, CVS, BSM, C-Dragon, TEAM.

PROTOCOL: 802.1x, EAP, TCP, RLP, UDP, IP, SNMP, SIP, fixed wireless V5.2 Protocols, RTP/RTCP.

OPERATING SYSTEMS: UNIX, Confidential IOS, RTOS (VxWorks), LINUX, Verifone Verix Vx, Windows,.

GUI: Visual C++ 6.0

WORK EXPERIENCE:

Confidential

Technical leader

Environment: C++/C, Confidential 3k/4k switches/router, 802.1x, Confidential IOS, EAP and Confidential propriety component.

Responsibilities:

• Participate in the design discussions with technical team to implement new SM architecture.
• Review and integrate all application requirements, including functional, integration, security and performance.
• Resolved many issues related to Dot1x, MAB and EAP framework.
• Design and implemented new features in SM UT, moved static policy into dynamic policy and auto configuration for devices.
• Completed/ reviewed all appropriate documentation required by the programmers, testers, deployment team, and application management team that maintains the identity module.
• Active member for few releases.

Confidential, Texas

Senior System dev Specialist

Environment: C++/C, UML, Linux, Verix V(Embedded OS) ARM, Biometric MSO 300 device, Verifone Vx570/510, ARM thumb processor and debugger.

Responsibilities:

• Participate in design discussions with technical architect from federal and various state governments departments.
• Review and integrate all application requirements, including functional, integration, security, performance, quality, and operations requirements.
• Architect, design, implemented and Integrate the MSO device (Bio-Metric device) with PoS Vx570/510 .
• Architect, design and implemented the communication module between PoS and EPPIC server, compliance with ISO 8583 standards.
• Inform the enterprise architect, program manager, director of any issues that may affect other areas of the project.
• Work with China’s development product team to implement and enhance functionality for of EPPIC Server. Involved in the System development, code reviewing with standard process.
• Application Architecture and High level technical design (HLD) to describe how the single application will cooperate with other state governments interface to provide an integrated solution that will achieve the architectural concept.
• Managing project risk, timely issue resolution and risk mitigation plan.
• Complete/ review all appropriate documentation required by the programmers, testers, deployment team, and application management team that will maintain the application.

Confidential, Texas

Designer/Senior system engineer in R &D group

Environment: Describe UML tool

Responsibilities:

• Discussed various solutions for codec rate adaptation with Huawei architect and Confidential & Confidential technical team.
• Delivered call flows and flow charts for the Application layer (SIP message) and ECN based solution for codec rate adaptation.
• Participate in transitioning the designs to the programmers, and ensure a clear and complete understanding of the designs of call flows and flow charts for these solutions.

Confidential, Texas

Designer/Senior system engineer in R &D group

Environment: C++/C, LINUX, VxWorks, OPNET simulator, QoS, RSVP, DSCP, Describe, MySQL and multithreading, EPC

Responsibilities:

• Since LTE is the evolution of UMTS, it was considerable a big challenge to change the existing Architecture and design. Participate in design discussions with technical architects.
• Designed HLD and DDL for eRAN 2.0 LTE RRM which includes the architectures call flows, sequence, use case and state diagrams for E2E QoS setup for UE and network initiated, data and control plane, modify and release for both mobile originated and terminated service, context transfer and QoS transfer modification for inter-cell mobility.
• Designed and implemented the admission and congestion control algorithms.
• Designed the mapping and bearer binding mechanism for S1, Radio and S5/S8 bearer.
• Designed and implemented various MAC schedulers (Uplink and Downlink), to allocate air interface resources optimally based on QCI (QoS), CQI and other weighted factors.
• Designed and implemented various queuing mechanism like priority Queuing, class based weighted fair and low latency ( CB - WFQ and CB-LLQ) and dropping mechanism like WRED to control the traffic and eNodeB load.

Confidential, Texas

Senior system engineer in R &D group

Environment: C++/C, UNIX, MySQL, OPNET simulator, Describe, socket programming.

Responsibilities:

• Review the standards for WiMax (IEEE 802.16).
• Implemented dynamic and semi persistent schedulers for data and real time services.
• Designed and implemented QoS schedulers and did the performance evaluation for different type of schedulers.

Confidential, Texas

Designer/Senior system engineer in R &D group

Environment: C++/C, Describe and Switching MA tool, MySQL, BSC.

Responsibilities:

• Analyzed various TCP congestion mechanisms like slow start, TCP Tahoe, Reno, and new Reno, SACK, SNOOP and various other algorithms with the impact of RLP to TCP.
• Designed and implemented a TCP stack on the Confidential called MA (Mobile agent) to differentiate the traffic from wired to wireless networks.
• Packets from the transmitter are copied into the MA and if the packets are dropped due to wireless matrices, different mechanism is used to retransmit the packet.
• Designed the TCP stack in the reverse direction, delayed ACK is constructed based on the feedback from wireless matrices.

Confidential, Texas

Designer/Senior system engineer in R &D group

Environment: C++/C, VxWorks, Describe, multithreading, Beyond compare, BSC and PDSN

Responsibilities:

• Designed a new Air interface state machine for the Enhancements in QoS in Network side.
• Designed and implemented RLP Assignment algorithm for multi- flow packet application.
• Design and implemented various call flows, state machines and sequence diagrams.
• Design and implemented a new dynamic buffer management scheme to creates dynamic sizes of buffers based on the data rate in traffic sensitive flows( TCP) and delay, jitter, packet drop QoS matrices for delay sensitive flows( UDP) .
• Analysis and simulate the calls statistics, used CBWFQ (queuing mechanism for different type of flows and used WRED for congestion avoidance for solving the global synchronization problem which was occurred in existing FIFO( first in first out) mechanism.

Confidential, Texas

Designer/Senior system engineer in R &D group

Environment: C++/C, VxWorks, Describe, Windriver’s Sniff, beyond compare

Responsibilities:

• Designed flow diagrams and proposed an ACK based RLP for SIP signaling messages to set up and release call for the following reasons which reduced the call setup delay for real time services and improved the performance. ACK based RLP can be used to reduce the call setup time for VoIP applications.
• Performed an analysis that showed ACK based RLP enables the quicker identification of dropped signaling messages.

Confidential, Texas

Designer/Senior system engineer in R &D group

Environment: C++/C, VxWorks, beyond compare, Describe, Win 2000, Sun Solaris.

Responsibilities:

• Designed the call flows, sequence diagram and state diagram for forward link scheduler.
• Designed and implemented QoS scheduling algorithm.
• The data throughput was increased about 18% and also resources allocated to each user fairly and when QOS functionality is on, user gets guaranteed minimum data throughput.