Role

Achievement / Activity Summary

Solution Architect

2010 - till date

·         Problem solving for live IMS network for Iusacell in Mexico.

o        Troubleshooting nodes like MTAS (VoIP server), CSCF, MGC, MGW, PGM (Presence & Group Management), EMe (Enriched messaging) etc. to resolve VoLTE and RCS features.

·         Preparing Solution description and acceptance test plan for small IMS system for North American Tier 3 operators.

o        Based on traffic profile preparing solution description document for targeted VoLTE & RCS features.

·         Solutioning VoLTE, IMS Greenfield deployment for Tele2 (Netherlands) networks.

o        Understanding operator requirement, dimensioning of the network nodes and designing Geo-redundancy.

·         Solutioning VoLTE with SR-VCC and RCS services for E-PLUS (Northern Europe) network.

o        Preparing proposals and work dependency diagram with effort estimate.

·         Solutioning for Mobile broadband charging system (CS5.0, MBC 2.2) in integration with 3G packet core network nodes (GGSN-MPG) for Orange Re-union (sub Saharan Africa).

o        Designing integration of charging & Billing system, designing of acceptance criteria and fulfillment.

Software Architect

2005 – Till Date

·         Designing and developing IMS client framework for South Korea Telecom on top of which Presence and live Media share based applications were launched. The IMS client framework supports SIP, RTP, RTCP, Sigcomp, XML, XCAP, HTTP, MSRP protocols / standards and XDM client-server specifications. This framework is based on IETF, 3GPP, OMA & GSMA specifications.

·         Architecting the client considering the features and restrictions of different platforms such as –

o        Processor architecture

o        Inter Process Communication

o        Threading model

o        Memory management model

o        Object orientation

o        Call flows of existing radio network libraries

o        Load time & run time dynamisms

o        Compile time & run time customizations etc.

·         Designing separate driver layer to absorb low level implementation with abstract high level interface.

o        Designing generic interface for UI layers of different handsets like HTC, LG, Samsung, Nokia, Motorola, I-Phone etc.

o        Supporting USIM and ISIM architectures.

·         Designing and developing transport layer, transaction layer, control layer, UI interface layer, protocol stacks and utility libraries.

o        Supporting Authentication, Sigcomp, IP Sec, Session Border Controller, NAT, Jitter Buffer etc.

o        The framework is platform agnostic and portable to different platforms like Android, Windows Phone, Symbian etc.

·         Architecting & developing Push to Talk over Cellular application (product) for NTT DoCoMo which runs over the IMS client framework. This was the first commercial deployment of any IP based mobile network application in the world.

·         Designing and developing a mobile client over IMS framework for full duplex voice communication over 1xRTT, EvDO, eHRPD, LTE Networks.

o        It follows VzW Wireless specific Network solution including support for SRVCC and supplementary VoIP features. Currently in Interoperability testing phase with NSN network nodes and with ALU application servers.

·         Designing and developing products (mobile & desktop applications) for Rich communication Suite (RCS) and Video Share.

o        Supporting OMA specifications for media transfer, contact management, presence and live share applications.

·         Solutioning and designing SMS within IM stack as per C.S0015-B version 1.0 3GPP2 specification for SMS for wideband spread spectrum.

·         Architecting and designing HTTP browser accelerator for desktop and mobile platforms.

o        Designing the client-server communication, designing the media server, the browser HTTP proxy with customized caching capability, the plug-in architecture compatible with different web browsers (like IE, Mozilla, Google Chrome etc.).

o        Defining performance measurement parameters.

Developer & Project leader

[1999 – 2006]

·         Developing automatic answering m/c for Railway Reservation & Train Status Enquiries

o        Accessing DIALOGIC PHONE CARDS (connected to the phone lines) on a PC and serving voice answers to phone calls (through dialogic cards) on the basis of a DATABASE query connected by serial communication. 

o        Protocol implementation of communication process between the application and the database server according to railway standard.

·         Software for Card reader & writer ( provided by M-Card) for Driving License

o        Creating forms for user interface and reading from and writing on cards using given APIs.

·         Image processing operations (segmentation, contour detection, edge sharpening etc.) on medical images for modeling purpose

o        Construction of 3D image from 2D images.

o        Input specific analysis of 2D and 3D images.

·         Data compression (video, static image, document).

o        Authentication of human face.

o        Prospect of vector quantization & wavelet theory in above applications & application of cellular automata.

o        Building of pipeline model for data compression and encryption (en-compression).