Sandeep Sinha

 

Phone - +1 425-406-0285

 

s12sandeep@yahoo.com

 

 

SUMMARY

·               16+ years of management and product development experience in the networking/wireless industry. Result oriented professional with a passion to build effective teams and to continuously exceed customer expectations..

·               Solid experience in building and managing specific solutions/technology/product consulting for both onshore and offshore

·               Planned and executed projects involving cross-functional teams and managed deliverables to/from partners, vendors and customers

·               Project management done for preparation and validation of test cases , test plan for IOT & Functional testing of various telecom nodes like MME,SGW,PGW,SGSN,GGSN.

·               Extensive working experience in various vendors like Cisco’s EPC ASR5500,ASR5K, AMDOCS (Bridgewater’s) HSS& PCRF, Motorola’s UMTS core and Access

·               Capture, track, analyse, and communicate requirement change requests, enhancements, and defects. Identify, clarify, and recommend solutions to issues and risks impeding progress.

·               Experience in review of Requirements document, Design documentation.

·               Extensively worked on Policy (PCRF)* Policy Control and Routing Function per 3GPP specification

·               Expertise on 3GPP standards related to PCRF and P-DRA platform, i.e. Gx, Sy, Sp interface

·               IR.94 Standard Video and PCRF treatment expertise per existing projects.

·               Extensive experience in design and development of IMS compliant component (P/S/I-CSCF,HSS) in IMS network architecture and services including RCS or VoLTE

·               Policy/charging and QoS enforcement in packet data networks.

·               Extensive experience in LTE / VOLTE network architecture and DIAMETER Base interface

·               In-depth working knowledge in wireless technologies and protocols including SIP, ANSI 41, GSM MAP, SMS, MMS, RTP, SCP, STP, SS7, AIN, EVDO, CDMA, LTE, IMS,SRVCC Mobile IP, circuit switching, and VoIP architecture

·               experience on HLR, HSS, EIR and Unified Subscriber platforms

·               Deployment experience WiFi OffLoad /Calling (ePDG; 3GPP AAA Server; SWu, SWn,Swa,SWm,STa,S2c,S2a,S2b)

·               In-depth working knowledge of the UICC and SIM configuration, ETSI/GSM and Global Platform specifications and

·               Experience in Integrating modules, System, Regression and Performance testing.

·               Experience in automate  Unit test cases and System Integrate test case.

 

 

SKILLS/TOOLS

 

Project Management:  Requirement Management, Risk management, Project Planning , Work Breakdown Structure (WBS),

Project Management Tools : Matrix (Risk, Traceability,etc) , Risk Analysis , Gantt , Pert ,MS Project

 

Product:  Bridgewater System PCRF and 3GPP AAA , Openet PCRF ,Alcatel soft switch 5020, Alcatel SMC 5735

 

Performance Tuning: Thread Synchronization, Resource Optimization

 

Technology :   RADIUS AAA, IMS, LTE(PCRF, Gx, Rx, Diameter, LTE Policy management), VoLTE calls (GSMA IR92 and IR94 ,WiFi Offloading /Calling

 

EDUCATION

M.C.A. in Computer Applications

 

PROFESSIONAL EXPERIENCE

 

AT&T Labs, Mobility Engineering & Development (REDMOND ,WA)                        11/2013 – Till Now

Solution Architect

 

Provide technology leadership in the area of Mobility Labs Integration and responsible for Design, Site Engineering and Implementation of complete NDCs in Mobility Labs leveraging LTE/VoLTE/Consumer/Enterprise designs from ground up

 

Perform tactical decision-making in response to technical issues, guide test case development and execution, interface with platform vendor and peer AT&T teams on a regular basis, and contribute technical input to overall VOLTE network design and lifecycle evolution.

 

Responsibilities –

 

·   Drive system design and platform engineering efforts for the ongoing development and lifecycle of project

·   Contribute technical information in Feature Requests (FR) for new requirements sent to platform vendor; participate in RFPs with prospective future vendors.

·   Contribute to architecture documentation (NDR, Gold Standards)

·   Proposed and Implemented VoLTE key network designs in Mobility Labs

·   E2E EPC-IMS Network System Integration

·   Troubleshooting of the E2E VoLTE calls (GSMA IR92 and IR94,E911)

·   LTE E2E Testing with trace analysis and identifying defects

·   Test case development, implementation, troubleshooting of various scenarios for VoLTE in Lab Environment.

·   Working on Virtualization of EPC, QvPC-vEPC (Hp c7000, VMware VSphere ESXi.5.5 solution).

·   Working with 10+ Vendors on more than 20+ Services in Mobility Labs as a Part of E2E EPC Network Integration

 

Technologies: Distributed blade architecture (HP BladeCenter, Cisco UCS), Linux/UNIX operating systems, RADIUS/DIAMETER, TCP/UDP/SCTP, and  3GPP & LTE PGW, PCRF, PCEF, SPR, P-CSCF, GSMA IR92 and IR94 and DRA

 

 

YTL Communications Kuala lumpur Malaysia                                          05/2012 – 11/2013

Senior Consultant Core Network Engineering

 

YTL Communications  leads in the creation of the world's 1st nationwide converged 4G network. Launched in Nov 2010, the Yes 4G network is the largest 4G network in Southeast Asia.

 

Managed the following Development activities

 

 

·   Brought in to design and scale YTL’s AAA infrastructure to support a retail and wholesale customer base of 8 million subscribers. Worked with business teams to determine how to provision and support feature sets for retail and multiple MVNO customers. Designed call flows, provisioning commands, and data schema. Worked extensively with Bridgewater Systems to implement new features in their AAA product and to improve performance. Performed capacity planning and load testing to develop AAA expansion roadmaps to achieve required capacity.

 

·   A trusted resource at YTL, pulled into high-profile issues across the company, including devices, DPI, RAN, core network, IT, network analytics, revenue assurance and customer care.

 

·   Integrate Diameter Routing Agent (DRA) with Gy and DCCA ,Gx interface ,Also Integrate DRA with two different Diameter Applications Id

 

·   Implement customised congestion control mechanism in  Diameter Routing Agent (DRA) for handling network traffic load

 

·   Participated in LTE core vendor requirements definition and vendor selection. Evaluated PCRF, HSS, and OFCS solutions from leading vendors. Researched how to bill LTE usage and control network elements in RAN-sharing environments.

 

·   Involved in Designing of Backhaul Solutions for Wi-Fi access points use WiMAX backhaul .

 

 

 

Bridgewater Systems( Wesley Clover Gurgaon India)

Project Manager 10/2009 – 04/2012

 

Expanded role as Manager to cover multiple product lines - AAA Service Controller, Home Subscriber Server (HSS), Policy Rules and Charging Functions (PCRF), 3GPP AAA, WiFi based solutions (Trusted WiFi Access).

 

The Amdocs Policy Controller is fully compliant with the Third Generation Partnership Project (3GPP) Release 7, 8 and 9 standards for the Policy and Charging Rules Function (PCRF) and can be deployed in HSPA, EVDO, WiMAX, and LTE networks as part of the evolved packet core (EPC). Within these environments, it can be rapidly deployed with many different types of policy enforcement points.

 

·   Managed the deliverables of a team of 25 members working on the development of Content Networking software

·   Responsibilities include managing new features development and bug fixing activities.

·   Responsibilities include monitoring, assigning and tracking defects.

·   Periodically synced up with the Ottawa Team on the current status and priorities of the team. Participated in customer escalation calls and followed up the issues to resolution.

·   Performed root cause analysis of customer bugs and identified ways to improve the quality

·   Managed the following Development activities

·        Implementation of EAP protocol on WIMAX AAA .

·   Implementation of Radius and Diameter (RFC 3588,RFC 4072) interface with EAP for AAA Controler.

·   Integration of EAP module with R6 module.

·   Integration of SNMP module

·   Support of WiMAX cross signed certificate

·   Implement Prepaid Billing server

·   Implement GBA authentication (RFC 4590, RFC3310)

·   Implement DCCA (DIAMETER CREDIT CONTROL) Interface

·   Worked on PCRF, Gx, Rx Diameter interface, LTE Policy management

·   Integration  of Samsung ASN-GW with BWS AAA ( Diameter STR Behaviour change when it contains Termination-Cause =DIAMETER _ USER_MOVED After an R4 Handover)

·   Design, Coding & unit testing of EAP module.

·   ICD (Interface control document) reviews, HLDD (High level design document) reviews, Unit test plan reviews.

 

Languages: C++, DBX(SUN Studio  tools

Environment:  Solaris

Technologies: Radius , Diameter , ,EAP-TLS,EAP-MD5 ,EAP-PSK ,EAP-TTLS , EAP-IKEv2 , PEAP , PEAPv0/EAP-MSCHAPv2 , PEAPv1/EAP-GTC ,EAP-FAST ,EAP-SIM, EAP-AKA,LTE

 

Avistar Communications Corporation  San Mateo CA01/2009 – 09/2009

Solution Architect

Avistar Signalling Gateway (SIP - H.323).

Avistar C3 Connect is a SIP-to-H.323 software based Gateway that extends the reach of a company’s existing videoconferencing environment. Through the gateway, desktop users can place calls directly into large videoconferencing and telepresence systems. Avistar C3 Connect, solved the issue of interoperability  .

 

 

·               Responsibilities include monitoring, assigning and tracking defects.

·               Managed a group of 8 engineers including 2 offshore test engineers

·               Responsibilities include planning and tracking product/software releases to customers

·               Managing test activities, reviewing/prioritizing key issues with development & customer support managers

·               Brought several key processes & tools in place to improve the quality of the product

·               Managed the following Development activities

·        Implement Inbound calling H.323 to SIP

·        Provides mappings between E.164 and SIP URIs . it translates the E.164 phone number sent by the H.323 endpoint into a SIP URI by looking up the number in a directory

·        Implement Outbound  calling  SIP to H.323

·        Implement call transfer initiated by either the H.323 endpoint or the SIP endpoint.

·        Implement translation of DTMF signalling between SIP and H.323 endpoints in the outbound direction only (SIP -> H.323).

·        Implement hold and resume between the H.323 endpoint and the SIP endpoint in either direction.

·        Develop plug-in for providing support the H.263 baseline (H.323-1996) video codec .

·        Develop plug-in for providing support the G.711μ-law audio codec.

·        Implementation of SightSpeed proprietary SIP and SDP extensions

·        Implement  SIP/SDP stack expansion for 3rd party compatibility

·        Made the H.263 SDP comply with RFC 4629, and added DTMF tone generation.

·        Unit testing of all the automated scripts & integrating it with the related tools for better access to the user like GUI.

·        Implemented a DirectSound audio framework intended to reduce audio latency, reduce dropouts, and integrate AEC.

·        Ported a legacy framework from a DSP platform to platform independent code. Expanded the RTP/ RTCP implementation, added threading to increase parallelism. I implemented a video frame rate backoff algorithm based on CPU load. With others, integrated H.263, H.264, and G.722.

 

Languages: C++, C, Java, Perl Script,GDB(GNU debugging tools) ,Open source

Environment: Windows 2000, Linux

Tools: Microsoft Visual C++ 6.0, Windriver ,GDB

Technologies: H.323,SIP, RTP, H.264, H.263, G.722, G711

 

Skyler Technology, Inc Concord, CA07/2008 – 12/2008

Tech Lead

Financial Markets Feed Handler

The financial feed handler (sometimes referred to as a “loader”) within the Skyler C3 Database is a module that interfaces to a message stream to collect market data and inputs the messages into Skyler C3 Database .The feed handler inserts records of a predefined format into a channel  Skyler C3 Database to interpret the records according to the predefined format

and order (for example, symbol, price, size, time stamp). Feed handlers receive North American Equities Level I and Level II market data streams via either TCP or UDP/Multicast protocol. The feed handlers also include a scheduler so that the channel is ready at the “start-of-day” and still available at the “end-of-day”.

 

·               Responsibilities include managing new features development and bug fixing activities.

·               Managed the following Development activities

 

·   Reading market data feed specifications

·   Creating high level design documents

·   Implementing Feed Handlers using the C++ programming language

·   Creating and executing formal and automated unit tests

·   Testing their Feed Handlers against a live market data feed

·   Tracking their progress in a database

·   Assisting with deployments at remote customer sites

·   Fixing bugs reported by customers

Environment: Red Hat Linux 9, C++, ACE, CORBA, TAO (The ACE ORB),RMDS, XML,SOAP, Perl Script  GDB(GNU debugging tools)

 

NTT Multimedia Communication Lab Inc. San Mateo CA09/2007 – 06/2008

UOPF M2M Real-Time Communications

Designer

UOPF M2M specification is similar to SIP specification.  NTT provides implementation of UOPF M2M specification. All signalling channels using IPSEC or TLS. It supports all message REGISTER, INVITE, ACK, PRACK, UPDATE.

For more detail visit this link

m2mx_presentation

·               Designed a Communication Manager which is similar to SIP Proxy.

·               Designed  a  Communication Client which is similar to SIP User Agent

·               Designed  and Developed NTT SIP Library which is wrapper on OSIP Stack

·               Developed synchronisation demon for Free BSD kernel’s Security Association Database (SADB) 

·               Used PF_KEY Key Management API, Version 2(RFC 2367) for retrieving, manipulating  Free BSD kernel’s Security Association Data

·               Implemented RFC 3329 SIP Security Agreement in NTT SIP Library

·               Implemented all transaction user functionality  like marinating State of proxy, Routings

·               Embedding MySQL server  with SIP Register Server 

·               Implemented various type of routing mechanism like Strict Routing, loose routings

·               Implemented various type parser which is not implement in OSIP stack

·               Developed IKEV2 functionality for security key exchange.  

·               Ported Application on Embedded  Linux (RTOS) 

·               Implement IMS nodes PCSCF,ICSCF,SCSCF

·               Implement IMS  SIP Application Server

Environment: Free BSD, Linux, C/C++, STL, SIP (3261, 3262, 3265), RTP,SRTP  RFC3903, IPSEC, IKEV2,IPV6 PF_KEY, PKI cryptography, Hashing, MySQL, OSIP , Open source , LDAP , Active Directory

 

 

Alcatel – Lucent,Gurgaon07/2004 – 09/2007

Development lead

A5735 SMC Service Management Centre

The Alcatel 5735 Service Management Centre (SMC) is a specialized, centralized software solution that manages multi-vendor remote access servers. It enables service providers to generate new revenue by wholesaling Internet access services to ISPs, offering remote access outsourcing services to enterprise customers, and provisioning multiple virtual networks on existing infrastructures. With its standards-based architecture, the Alcatel 5735 SMC also acts as a full-featured proxy RADIUS or server, supporting VPN tunnelling, IN internetworking and AAA services. The work includes the various feature enhancements in the product like:

1)Ip pools Allocation mechanism in SMC.

2)Inter cluster synching using multicasting

3)Overloads mechanism functionality for the SMC.

4)          Implement EAP EAP TLS

5)          Implement NMS, SNMP

 

·               Responsibilities include Project initiation and Requirement Management.

·               Participate actively in project DR0 and related meetings and to gather all requirements. Gather functional, non-functional and all type of requirements which are input for DR1 preparation.

·               Active communication to sub-project Project Managers on the scope and any changes and to keep all teams aligned. Act as main interface between R&D and PLM team.

·               To take lead during this phase to get the requirements clarified to all teams involved, make FS available from Systems team, any kind of understanding issues to be sorted out on the fly, so that planning can be done on stable set of requirements

·               Actively Involved in SEI CMMi Level 5 Audit Interview because this project selected for  SEI CMMi Level 5

 

Environment: HP TRUE 64 Unix, Linux, C/C++,STL, AAA,RADIUS , Diameter, Oracle 8i,Oracle 10g, LDAP Active Directory, NIS+ MQSeries , CFT steelbalt, openradius, Cisco radius dictionaries, Perl Script

 

TIBCO Software Inc.          07/2003 – 06/2004

Tech Architect

TIBCO Adapter for COM

TIBCO Adapter for COM allows users to use ordinary COM interfaces to send messages over TIBCO information bus. It relieves the user from writing complex code to manage a messaging session or to marshal application data into messages. Instead, user develops a COM interface

 

 

·               Managed a group of 5 engineers including 2  test engineers

·               Participate actively in project related meetings and to gather all requirements. Gather functional, non-functional and all type of requirements

·               Developed Capabilities by using ATL COM library, which allows COM components to be driven by messages flowing off TIBCO information bus. Using the graphical administration tool, messages on a particular subject can be mapped to a particular COM method. When the service component of TIBCO Adapter for COM is started,

·               Implement module by using C++ template which automatically creates an instance of the co class and starts listening on TIBCO Rendezvous for messages on the configured subject.

·               I used TIBCO RV, MQ series for communication.

·               Also Implement a method, When a message arrives, the service automatically unmarshals it and converts it into an invocation of the appropriate COM method call.

·               Used TIBCO BusinessWorks 5.1 and TIBCO BusinessWorks SmartMapper for configuration COM Adapters

·               Used TIBCO Hawk for monitoring and managing COM applications.

·               I encompassed managing the whole engineering team for design, implementation and testing

·               I have done the full cycle of SDLC for the TIBCO adapter for COM and coordinating

·               To enable the communication between COM and .NET components

Environment:  Windows, VC++,win32,  TIBCO EAI Framework, .NET Framework, TIBCO Rendezvous ,ATL COM/DCOM,SOAP, MQSeries.TIBCO RV

 

Coré Solucomm for Lucent Technologies 01/2003 – 06/2003

Team Leader

Encoder/Decoder for H.225 and H.245 using ASN.1 (aligned PER)

H.323 is a communication protocol standard approved by ITU-T. This protocol uses H.225 for call signalling and H.245 for multimedia channel management.

 

·               product Management and Capturing specific technical and business requirements.

·               Creating functional specifications and directing engineering teams.

·               Understands tradeoffs between technology and business exigency

·               Techno-Commercial communications to client staff at Upper levels on various New Development and Plans.

·               Provide substantial remote support, guidance, and advice to other teams across the company.

·               Managed the following Development activities

·                    Developed encoder/decoder by using ASN.1 (Abstract Syntax Notation), C++, STL and it uses Aligned PER Encoding. Messages that are exchanged by the H.323 protocol need to be encoded in this format.

·                    Designed a C++ wrapper class for parser that can parse incoming and outgoing message. That would parse the ASN grammar and would then output C code (and related structures) that an application programmer could include in their application to encode and decode H.323 messages. 

·                    Designed a framework in UML diagram that responsible for Converting ASN.1 data structures to C structures and vice-versa was difficult to do by hand as there are over 1500 structures that constitute the H.225 and H.245. These specifications were also growing as newer versions of the protocol are developed

·                    Used delegate design pattern for handling various types of messages. Also used for proxy    design pattern for handling memory management

Environment:  RHT Linux  9.0, C++ STL, MySQL, Flex Bison, Lex &Yacc, Socket programming,ASN.1

 

Core Solucomm for Lucent Technologies 09/2002 – 12/2002

Team Leader

SIP PARSER

SIP is a communication protocol standard approved by the IETF (Internet Engineering Task Force). SIP provides the signalling capability for multimedia communication across IP based Networks. SIP messages are encoded in plain text.

 

·               product Management and Capturing specific technical and business requirements.

·               Creating functional specifications and directing engineering teams.

·               Managed the following Development activities

·        Developed parser by using C++, STL library. Parser used for unified messaging services that would decode the SIP message and store the components of the SIP message in a data structure.

·        Designed Use cases, Class diagram, sequence diagram for parser. Text encoded messages was difficult to convert into a binary format that the application can easily decipher and operate on.

·        Developed a parse Capabilities to solve the issues in text, presence of white spaces which while making the message human readable makes it difficult for easy translation.

·        Thread pooling and multi request mechanism, session handling developed in C++ for Central unit of unified messaging system.   

·        Parser support all SIP messages which are present in RFC3261.

Environment: Linux 9.0, C++, SIP (RFC 3261), SIMPLE, MySQL, Radvision SIP stack

 

Core Solucomm for Lucent Technologies 05/2001 – 08/2002

Team Leader 

IP EPBAX (Soft switch)

Project H.450 based PC EPBAX: Implemented over open H.323 stack V 3.0,C,C++,STL, this application provides standard EPBAX functionality (call hold, call transfer, call switching, call reject, Barging). Implemented the Gateway for interfacing with the Switched Circuit Networks with the H.323 Endpoint.

Proxy for Handling H.323 calls: Also implemented a H.323 proxy over the Open stack v 3.0 for routing through the corporate firewalls for connections over the Internet behind the Proxy servers.

Multipoint Conferencing: Implemented the feature of MCU for Ado Conference Expansion over the Endpoint.

 

·               Project planning, Provide technical expertise on implementation of Lucent technology.

·               Creates technical architectures and works with the project management to create a detailed and realistic schedule and resource plan to realize the architecture.

·               Expert in all aspects of client data services delivery architecture. Participates in client roadmap planning, contributes to client technology standards and approaches.

·               Capturing specific technical and business requirements.

·               Architect complete solution stack to produce and exceed desired/committed service level and functionality.

·               Creating functional specifications and directing engineering teams.

·               Understands tradeoffs between technology and business exigency.

·               Managed the following Development activities

·        Design C++ class diagram which were responsible for call processing and call handling, controlling media gateway.

·        Design of the Call flows for the Application using UML diagram.

·        Designed call handling framework by using Radvision SIP stack

Environment: Unix, C++, C, H.323, H.450, Open H.323 stack

 

Aumteck Inc 05/1999 – 04/2001

Developer

IP Telephony (Telephony system on Internet)

H.323 based PC phone: Implemented over RADVision's H.323 stack V 2.5, C++, STL, Own custom library .this application provides standard phone functionality (voice communication, caller ID, call hold, call transfer, voice mail, touch tone response, call reject).

Phone COM object: I have developed a COM object by using ATL COM library, win32 which provides interfaces for accessing H.323 phone services such as making a call, receiving intimation about incoming call, taking a call, sending touch tone input, call transfer etc. I was in the process of extending this for SIP as well. As a result clients of this COM object will be able to produce SIP and H.323 compliant phones in a rapid development environment like Visual Basic - and without having to learn the protocol details.

VXML interpreter: The Voice Extensible Mark up Language (VoiceXML) is a new computer language designed to make Internet content and information accessible via voice and phone. With the support of leading Internet industry players, VoiceXML has made speech-enabled applications on the Internet a reality. I have implemented one of the few fully functional VXML interpreters available today.

H.323 call generator: This is a test tool I have developed in C++, C, win32 that used for stress testing H.323 devices and for checking compliance. The tool allows a number of calling parameters to be specified such as duration of channel connect for individual channels, number of incoming and outgoing channels, time profile of calls etc.

Environment: Linux, Windows, C++ Visual Basic and VC++ (Com/Win32Api), ATL COM, H.323, Radvision H.323 stack