Yunghwa Tai                                                                                                                               

39 Hawthorne Ave

Holmdel, NJ 07733

732-991-0798

yhtai@yahoo.com

 

OBJECTIVE

 

A lead architect position in advanced telecommunications network evolution applying Cloud and SDN technology

SUMMARY

 

More than twenty years of network architecture, professional services, and customer facing experiences focusing on advanced telecommunications solutions and network evolution.  Accomplished the first North America’s IMS RFP and successfully implemented in Tier 1 carrier. Led the work on delivering tier 1 carrier VoLTE launch and NFV proposal.

 

AREAS OF EXPERTISE

 

·               Innovative solution architecture crafting technical proposals for winning	·               Professional services delivering customer satisfaction
·               Problem solving with strong analytic skills unveil root cause and propose practical and effective solutions	·               Large and complex program execution for on schedule delivery meeting the financial target
·               Evolutionary approach maximizing customer’s existing investment and retaining continual revenue stream	·               Cutting edge technologies: SDM, Cloud, NFV, WebRTC, RCS, PCRF, IMS, VoLTE, MRF, MME, SGW/PGW, HSGW, HA , eHRPD, EVDO, CDMA, HSPA,

 

 

PROFESSIONAL EXPERIENCE

 

NEXIUS SOLUTIONS, Inc.4/2014 – Present

Principal Architect

 

Lead the professional service team work under Statement of Work (SoW) responsible for the following deliverables to Cox Communications:

·   Deliver Build/Operate/Transfer (BOT) request for proposal (RFP) for Cox Voice Platform Migration to IMS

·   Define OSS and BSS requirements mapping and enhancing current Cox operations and business processes flows to the TMF eTOM model for the IMS network operations and service management.

·   Specify parity Cox Digital Telephony (CDT) Service Features over IMS including CS2K service features, BTS10200, order management and provision of IMS based CDT.

·   Specify parity Cox Business (CB) Service Features over IMS including Broadsoft service features, order management and provision of IMS based Cox Business services.

·   Develop migration plan and supervise Cox IMS BOT managed service vendor network implementation, operation, migration and transfer.

 

ERICSSON6/2012 – 3/2014

Customer Unit Support Verizon

Solutions Manager III – IMS Lead

 

Pre-Sale: Lead Ericsson technical team work with sales and fulfillment to formulate winning solution and strategy for bidding Verizon’s RFI/RFP’s.

Post-Sale: Establish strong working relationship with Verizon’s Organizations to facilitate lab testing, network certification, and field deployment.

 

·               Proposed Ericsson Virtualization solution to Verizon for their Network Function Virtualization (NFV) and Soft Defined Network (SDN) to virtualize Verizon’s network functions in order to meet upcoming network capacity needed in support of new model of consumer and business services. This initiative led to Verizon agree on an NFV demonstration at Ericsson’s Montreal Lab.

·               Led the technical team to deliver an RCS trial to Verizon Lab. The RCS platform was successfully installed in Verizon lab and integrated with Ericsson IMS platform.  This integrated platform has successfully demonstrated to support use cases specified by Verizon.

·               In charge of Ericsson’s Multi-media Telephony Application Server (MTAS) solution to secure Ericsson TAS launch for Verizon VoLTE services launch. Effectively negotiated feature customizations, environment requirements, HW, SW, load and capacity testing, KPI’s, traffic model, pre-FOA, post-FOA, and network monitoring to ensure a delivery plan for successful product introduction to Verizon networks; successfully demonstrated system load and capacity test as an entry requirement for FOA HW installation.

·               Led the Ericsson technical team working with ALU, NSN and Cequint, for Verizon VoLTE launch.  Successfully delivered multi-vendor integration in both Ericsson’s lab and Verizon Southlake lab including meeting Verizon’s call flows, integrating with embedded SDM, CSCF, MRF, PCRF, and CNAM.

·               Led the Ericsson team proposed HTTP Proxy solution for FDV.  Winning a trial Multi-Service Proxy / Application Proxy (MSP/AP) contract that would lead to subsequent production contract for IMS based service self-care platform for FDV and VoLTE.

·               Documented detailed Ericsson’s architecture proposal in Solution Descriptions in response to Verizon’s VoLTE for Business RFI with the architecture support the service concept of one device for both personal and enterprise communications.  A turn around to the vendor evaluation that puts Ericsson’s proposal over competitors.

·               Led the technical team proposed Policy and Charging Control solution support an IPX roaming platform.  The proposal include the Traffic Detection Function deploying in Visited Public Mobile Network interworking with the PCC platform in roaming provider infrastructure.  The solution supports upcoming BEREC regulation planned enforcement in July 2014 for Alternative Roaming Provider (ARP).  The proposal was reviewed with partners and as roadmap development for potential customer needs.

 

NOKIA SIEMENS NETWORKS1/2009 – 6/2012

Lead Solution Architect

 

Responsible for both pre-sale and post-sale end to end architecture design covering EPS, IMS, VoLTE, network migration and interworking with legacy networks.

·               TerreStar:

­        Worked with TerreStar on Statement of Work (SoW) for end to end 3G HSPA and IMS Architecture and Design (A&D), including 3G Packet Core support M2M, and CSCF, SDM, PCRF, MRF, TAS and SBC support voice inbound roaming

­        TerreStar A&D – a customer paid professional services, developed the Architecture and Design (A&D) document for TerreStar MSS 3G HSPA and IMS networks.  The A&D was delivered with top quality exceeded customer expectation, the A&D served as the guide book for network implementation and service launch

­        Designed Mobile Satellite Services (MSS) 3G HSPA core for M2M services and IMS platform supporting inbound roaming services from AT&T, this is the first commercially operational IMS network in North America allowing AT&T 3G circuit switch inbound roaming to TerreStar MSS and IMS based voice core.

­        Designed and tested transcoding using Genband’s MRF (C3/G9) for transcoding between satellite based DVSI AMBE+2 and commercial terrestrial codecs, this supports regular calls and CALEA delivery

·               LightSquared

­        Designed multimode 4G network architecture proposal comprise LTE/EPC, EGAL RAN/eHRPD and roaming with legacy 3G networks led to NSN winning the contract

­        Worked with LightSquared on contents of SoW for Architecture Specifications and Design (ASD) for end to end EPS and eHRPD multi-mode networks, including 4G Packet Core, CSCF, SDM, PCRF, MRF, TAS and SBC for multimedia and voice service platform

­        LightSquared ASD – a customer paid professional service, led the Joint Architecture Design (JAD) with technical team comprise NSN and LightSquared members for LightSquared architecture design, successfully delivered the ASD with top quality that wins customer satisfaction.

­        Defined S9 reference point interworking between LightSquared (home) PCRF and partner’s (visiting) PCRF for inbound and outbound roaming.

­        Designed transcodning using LightSquared appointed MRF for transcoding between satellite based EVRC 4GV and LTE based AMR-WB.

·               Verizon:

­        Verizon Wireless CALEA: a comprehensive Lawful Interception solution integrating NSN’s Subscriber Data Management (SDM) with SS8 Xcipio platform, the solution was successfully implemented and operational in Verizon’s networks

­        Subsequently extended the Verizon wireless CALEA with geo-redundancy solution to fully meet VzW’s network geo-red requirements, the solution was successfully delivered both phases Architecture Documents and implemented in Verizon networks

­        Architected and implemented Verizon Wireless IMS transcoding employing Feature Execution Environment (FEE) and Genband C3/G9 (serve as MRFC/MRFP) with network intelligent to invoke transcoding only as needed, Codec supports satellite based AMR-WB conversions to commercial terrestrial codes

·               NSN product knowledge: MME, SAE-GW, CFX-5000, One NDS, NT-HLR, Flex-ISN, NVS, HiQ-8000, HiQ-4200, CMS-8200, PCS-5000, NVS, IPA2800, iNUM, LIG, LIMS, Charge@Once, etc.

·               Partner product knowledge: Cisco ASR5000, Genband Transcoder, Starent HSGW, Juniper 3GPP2 AAA, Movius VMS, Acmepackets SBC.

 

IBM1/2008 – 1/2009

Senior Managing Consultant

 

Provide technical leadership and expertise in business transformation for Telecommunications carriers from legacy network technology and services to next generation network architecture and service platform

·                           Defined the service development and deployment process for Qwest NGN service offering.  This product development process comprises the High Level Design (HLD), Detailed Design Document (DDD), Bill of Material (BOM), Lab Validation, and golden configuration.  Authored an HLD for SIP Trunking product as the starting point of the process.  This SIP Trunking HLD contains the service descriptions, architecture design, voice and data connectivity (including the VPN, MPLS, VLAN, and IP Trunk Group), configuration, network redundancy, service survivability, provisioning data and data modeling.  This work has been referred to as the norm for future NGN service development.  The configuration defined in HLD includes the following network elements: Sonus PSX, GSX, NBS, Cisco 7613 and 7609.

·                           Led a team developed an enterprise location based service as hosted service for AT&T.  Defined the architecture of this LBS with PARLAY-X gateway that exposes APIs for third party service creation.  This architecture leverages a correlation engine with rich presence data as service enabler.  The rule based correlation engine takes the information from location server and based on the algorithm to calculate results for determining whether a status update for service entities is required or communication connections should be established between service entities.  This LBS service platform has been integrated with AT&T’s IMS platform for network trial.  This application could be modified to offer a variety of services for many industries including, for example, healthcare, public transportation, and package delivery.

 

COMCAST3/2007 – 1/2008

 

Principal Engineer

 

·               Provided expertise in planning Comcast’s next generation networks complying with PacketCable 2.0 standards.

·               Provided technical leadership in designing and deploying the Business Comcast Digital Voice (BCDV) for small business market.

·               Defined the BCDV overlay architecture leveraging the existing Comcast Digital Voice infrastructure with interconnections to the PSTN and peering partner networks.

·               Worked with Cisco for BTS10200 softswitch function and feature enhancements for the BCDV deployment.

·               Detailed design including the dial plan, access management of MTA/CMTS/CMS mapping relationship, Local Number Portability, SIP proxy routing.

 

BUSINESSEDGE SOLUTIONS (BES Acquired by EMC) 6/2005 - 3/2007

 

Lead Solution Architect

 

·               Delivered the first IMS RFP in North America for Verizon and this work is the root of today’s Verizon Wireless IMS platform.  Primary responsibilities are in the following functional areas and components:

­        Wrote the detailed RFP requirements for: CSCF, BGCF, PCRF, MRF, CCF (both online and offline charging) BCF/BGF, Government Mandates – (E911 and GETS) and interworking requirements with legacy PSTN and VoIP networks.

­        End-to-end IMS architecture interworking with Verizon Business legacy VoIP service platform

­        Developed detailed call flows specify the IMS support of Verizon Business toll free, E911, and CALEA.

·               Provided expertise in evaluation and scoring of vendor’s response to the IMS RFP and led the face-to-face discussions with vendors on their solutions.  IMS RFP responses evaluation for the following vendors: Siemens, Lucent, Ericsson, Nortel, Alcatel, Sonus, Tekelec, IBM, HP, Nominum, Camiant, Broadsoft , Acme Packet, Intec and Openet

·               Authored the following component HLDs: CSCF, PCRF, and PDF that serve as the base for further developing the requirements for the RFP documents

·               Led the team for the IMS provability multi-vendor lab design, created the provability test plan with test cases for gap analysis; authored the gap analysis report that identifies the functional and operational gaps using the RFI and the 3GPP IMS specs as the references

 

ITHAKA HARBOR4/2004 – 6/2005

 

Senior Systems Engineer

 

·               Defined requirements specifications for Ithaka’s Shared Infrastructure Platform (ShIP) for technical journal archive.  I am responsible for the ShIP work flow engine and the security function.

 

LEAPSTONE SYSTEMS INC (Acquired by Motorola) 1/2002 – 4/2004

 

Lead Solution Architect

 

·               Defined requirements specifications for Leapstone’s Communications Convergence Engine (CCE) delivered to Qwest as enabler providing IP based mu;ti-media communications services.

·               Represented Leapstone in multi-vendor team worked with IBM, AcmePackets, Cisco, Souns, Sylantro and IPUnity for Quest Communications Consumer-VoIP and Business-VoIP projects to provide service platform support for service provisioning and wholesale/retail model.

·               Specified system requirements for the development of Leapstone’ Content Management (CM) product deployed to the Verizon Wireless’s network for content stocking, catalog publishing, order taking, and revenue management; developed both the wholesale/retail and the revenue sharing pricing models focusing on different products and markets.

·               Worked jointly with Nortel, Accenture, Ubiquity and SS8 in developing an RFP response to Verizon Communications for softswitch.

 

SS8 NETWORKS8/2000 – 1/2002

 

Technical Director – Asia Pacific

 

·               Led the technical team providing the technical proposal for Chunghwa Telecom SIP based VoIP trial tender; this work led to the winning of the very first contract for SS8 Networks to install SS8’s SIP based Intelligent Network solution for Chunghwa Telecom.

·               Defined the product requirements for IP based IN services including Voice VPN, 800, LNP, OneNumber, Voice Mail, Conferencing services and the network media interactions

·               Specified the inter-operability testing document for product certification for partnership programs; successfully tested SS8’s SignalingSwitch and ServiceController with multi-vendors’ network equipment including Softswitch, Media Gateway, Signaling Gateway, and end user devices.

 

AT&T3/1988 – 8/2000

 

Senior Technical Staff Member

·               Defined COIPP architecture support for basic connection and advanced services with IMDB.  Successfully delivered the COIPP Call Control module system requirements support for H.323 based Toll Bypass VoIP services.

·               Defined the requirements for message based Content Delivery service offered to AT&T mail users; messages can be specified for delivery to wireless handset, phone, or e-mail.

·               Defined system requirements for AT&T’s Global Enterprise Management Systems (GEMS) to support Cisco’s Hot Standby Routing Protocol (HSRP) for managed router service customers. 

·               Responsible for service realization of AT&T Direct, international calling card and prepaid card services from the inception of the service concept with technical analysis, defining the detailed service behavior in the Technical Service Description (TSD).

·               Developed test plans for First Office Application (FOA), First Field Application (FFA), and set up the test environment and executed the test cases ensuring the service features delivered in Lucent 5ESS and NCP software releases meet the TSD specifications.

 

ARGO COMMUNICATIONS(Acquired by FTCC)12/1983 – 3/1988

 

Senior Engineer

 

·               Responsible for central office and earth station equipment acceptance test and pre-service certifications including Nortel DMS-250 and M/A-COM Microwave Radio.

 

EDUCATION

 

MSEE – City University of New York, NY 1983

 

Patents:

·         Policy Engine in an Internet Protocol Multimedia Subsystem

·         Application Service Invocation

·         Application Service Invocation Based on Filter Criteria

·         Network Routing

 

References

Will be furnished upon request