Narayan Sahoo

23 High Ridge Road

Ocean, NJ  07712

 

Home: (732) 493-3489

Cell: (732)-236-7879

E-mail: narsahoo@gmail.com

 

SUMMARY

 

Strong background in telecommunications in both wire-line and wireless products, specifically in the area of Wireless networks: Virtualization on 4G LTE network functions and SDN, 3G, 4G LTE, VoLTE, CSFB, IMS, CDMA, VoIP, 1xEVDO, Backhaul QoS, VM, Hypervisor platform, Optical Network (SONET/SDH), ATM, Ethernet, IP. Extensive experience in fault correlation, system architecture & engineering, and software development. Technical leader in planning, architecting, designing, implementing, real-time, systems, network fault correlation, and application software for telecommunication products. Excellent interpersonal, communication, analytical, leadership, management, and organizational skills.

 

SKILLS

 

·   Lead SE in analyzing virtualization principals first time in 4G VoLTE ATT networks for service assurance.

·   Worked on Service Assurance Data Analytics and production (virtual and non-virtual) data analysis using vertical correlation.

·   Created virtual network control planes on common legacy hardware towards SDN architecture

·   Worked on VM (Virtual Machine) and Hypervisor platform relating to Tele-communication Network cloud.

·   Experience in network fault root cause analysis using vertical correlation of VM application fault events, Hypervisor alarms, KPIs, physical hardware, and communication alarms.

·   Experience in fault correlation between fault events and KPIs in order to determine root cause of impacted service quality management parameters.

·   Worked on correlation between physical alarms, Virtual application alarms (from VMs), Hypervisor alarms, and KPI events to find the root cause of the problem using Horizontal correlation and vertical correlation.

·   Familiar with Cisco UCS and HP platforms and its installed Hypervisor and VMs

·   Familiar with Cisco, Ericsson, Affirmed Networks virtual network functions including VMware ESXi and KVM Hypervisors

·   Familiar with SDN technology including Open Source, Openstack, Openflow, OVS, OVSDB

·   Interfaced with various operation tier support to ensure end-to-end service assurance (management of fault & event, performance, QoS, network traffic) standards using Service Quality Management KPIs trigger and also through Big data Analytics.

·   Experience in building network topology for both 4G LTE data network and VoLTE network to support Root Cause Analysis (RCA) using CDC (Cross Domain Correlation) between IMS and LTE network for FM events and PM KPI alerts.

·   Experience in VoLTE call flows through RAN (X2, S1-u, S1-c), IMS (CSCFs) and EPC (MME, PCRF, SGW, PGW) networks.

·   Thorough knowledge of 3G, 4G LTE, IMS, EVDO, 3G1X, SS7.

·   Extensive knowledge on protocols (RADIUS, DIAMETER, SIP, H.323, RSVP, H.248, MGCP, ANSI-41, RTP, RTCP, DiffServ, TCP/IP etc.).

·   Developed design requirements for service assurance on fault management for 3GPP Diameter protocol interfaces (Rx, Gx, S6a, S9, Sh, Cx, Dx) and SIP protocol interfaces.

·   Familiar with the Vendors’ Network Elements (Tekelec, Cisco, ACME, ALU, Juniper, Carrier-IQ tool) for VoLTE deployment.

·   Thorough knowledge in IMS architecture and its interfaces with call session control functions (CSCF).

·   Familiar with Broadworks VNF platform  and its supported protocols (SIP, MGCP)

·   Familiar with IP/BGP, DHCP, DNS

·   Experience on communication and transmission systems such as WIFI, LTE, DSL, PON, WDM

·   Experience in end-to-end Systems Engineering, Architecture or Design in the areas of IP Networks and Virtual Services Design and service assurance

·   Experience in working on VoIP technology and its components such as, signaling protocols, media servers, interconnection, etc.

·   Lead VoIP feature "Robust Header Compression" implementation in EVDO wireless product

·   Knowledgeable in RFCs and Standards relating to wireless network (3GPP/3GPP2), transport network and network elements.

·   Experience in managing critical project issues and risk using project management methodologies.

 

 

EMPLOYMENT EXPERIENCE

 

AT&T, Middletown, NJ              September 2012 – September 2015

System Architect/Engineer

 

·   Worked as lead SE in analyzing virtualization principals in 4G VoLTE networks

·   Introduced the first service assurance virtualization architecture (vertical correlation) in two projects that helps the operation and cost saving to AT&T. Helped in end-to-end lab testing until the deployment.

·   Developed the strategy and architecture for service assurance with SDN and virtualization Principals.

·   Predicted fault using Service Assurance Data Analytics on production data (virtual and non-virtual network element).

·   Established association rules and analyzed the root cause fault between VM, Hypervisor, Physical Fault alarms, TCAs, and PM counters using vertical correlation.

·   Worked on analytics to find fault patterns using large production data with fault, KPI, and network topology.

·   Worked on alarm correlation between the PAS (Policy Access Server) and other peer NEs in different interfaces (Rx, Gx, S6 etc.) that use the Diameter Protocol.

·   Architect of network topology for LTE data network and VoLTE network to support alarm analysis.

·   Create requirements for development team to support root cause analysis of the network alarms using correlation between fault management alarms and KPIs on VoLTE call set up scenario using IMS.

·   Analyzed the alarms and KPIs on NEs related to 4G LTE interfaces (Rx, Gx, Gy, S5, S11, S1-MME, S1-u, R0, Rf, SLg, Sv) and IMS network.

·   Have strong knowledge about the protocols (RFCs) that are used in different 4G LTE interfaces and VoLTE call flows.

·   Worked on SQM (Service Quality Management) alerts and fault alarms on NEs to find the root cause using cross domain correlation alarm analysis.

·   Worked on data preparation for Big Data Analytic project.

 

Alcatel-Lucent Technologies, Wireless Group, Murray Hill, NJ              June 2002 - June 2012

Senior System Architect (Consulting Member Technical Staff)

 

·   Worked as a systems engineer for the EVDO and 4G LTE product.

·   Developed requirements for NMS (Network management System) to support end-to-end service assurance in configuration/provisioning, Fault correlation, Alarm handling, performance monitoring.

·   Authored the VoIP white paper which involved new architecture to implement VoIP and Video Telephony (VT). Worked extensively in using RFCs, Standards, designing simulators, performance analysis to optimize RoHC (Robust IP header Compression) and multiple A10 protocols in the Radio Network Controller (RNC).

·   As a member of System Architecture Review Board (SARB), reviewed performance of Intelligent Antenna (IA) product.

·   Worked on LIU (Line Interface Unit) processor occupancy (PO) software optimization in order to meet capacity requirement for both CDMA (EVDO) and UMTS product.

·   Worked on real time in-service monitoring tools for VoIP & VT application to evaluate QoS (Quality of Service) parameters such as delay, jitter, and packet loss.

·   Lead Technical discussions and brought agreement to issues with Vendors (QualComm, CISCO, Starent ).

·   Thorough knowledge in IMS architecture and its interfaces.

·   Architect for the Data Communication Network (DCN) to support user interfaces from external management system. DCN uses the IP network and OSC and GCC channels.

·   Lead the following security features in: Security Administration and User Class Authorization, Authentication, System Access control, SSH (Secure Shell), SSL (Secure Socket Layer), RADIUS, SNMPv3, IP Access Control List (ACL), Encryption, Developed requirements for user interfaces in TL1, and CLI for the security features.

 

 

Lucent Technologies, Lambda Manager Group, Holmdel, NJ              October 2000 - May 2002

Software Architect (CMTS)

 

·   System architecture work included investigating the network elements’(NE) function, inter-working operation between the NEs, and evaluation of major functional behaviors of the NE being architected.

·   Guided different functional design teams to support software development which included a review of software architecture and its ability to support real-time traffic. Developed a set of targeted test scenarios to characterize the real-time performance in terms of delay, data update, and communications between processors.

 

Lucent Technologies, Band width manager (BWM) Group, Holmdel, NJ              October 1997 - October 2000

Distinguished Member of Technical Staff (DMTS)

 

·   Led the system architecture team of Bandwidth manager for its entire cycle.

·   Managed software architecture provisioning, cross connect, error recovery, database management, interrupt handling, system initialization etc.

 

AT&T Bell Labs, DACSIV Software development Group, Holmdel, NJ               August 1985 - October 1997

Member of Technical Staff (MTS)

·   Designed and implemented the following over various DACS IV and DACS IV releases:

o   Provisioning, Cross-connect, Equipment Protection switch, Error recovery, Database management, System init., Performance Monitoring

 

EDUCATION

·   Master of Science, Electrical Engineering - University of Alabama, Tuscaloosa, Alabama.

·   Bachelor of Science, Electrical Engineering - India.

 

STATUS

U.S. Citizen