Vijaya Pavan Kumar Chebium

RedmondMobile:  +14256586524

WA, USA            Email :   cvpavan78@yahoo.com

 

·               Carrier Exposure: AT&T Redmond LABS,  Airtel, Vodafone, Tata

·               Vendor Exposure : Ericsson LTE/3G, Huawei 3G, Nokia 2G, Lucent CDMA

·               LTE Features: VoLTE, SRVCC/eSRVCC to Utran/Geran, SON(Self Organizing Networks)-ANR(Automatic Neighbor Relation),  CS-FallBack, PSHO to Utran, Carrier Aggregation.

·               3GPP Interfaces Working Knowledge: S1-MME, S1-U, S6a, S11, S5/S8, Rx, NAS, S1-AP, RRC, GTPv2c, GTP-U,  RNSAP, RANAP, BSSAP+,GTP, IPv4,IPv6

·               Hands on various tools like QXDM, TEMS, Azimuth RF simulator, Wireshark, Rohde &  Schwarz CMW500, Aero flex TM500.

·               Good knowledge on SDH/NFV (Virtualization) Concepts, SDLC (Software Development Life cycle)

·               LTE & UMTS System Validation, testing of Ericsson RAN Products (UTRAN/E-UTRAN)

 

·               Started working for AT&T EPC Projects. My Role is to test & validate the AT&T  Virtual Platform- Network Nodes SGW, PGW, SGSN, GGSN, PCRF.

 

 

·               Preparation of test instructions as outlined in the Radio Access Network (RAN) New Product Introduction (NPI) project scope for LTE Advanced features- SON, Carrier- Aggregation

·               Executed test object list and TI in Qualcomm LAB, customer lab environment and in a live customer network.

·               Identified faults and troubleshoot them according to a set of defined alternatives and standard procedures as set by the customer. Performed complex updates/upgrades of live networks. 
Perform post processing of logs and participate in verification and analyze SW validation of 4G/3G Protocols on the Interface been E-NobeB, MME, MSS, SGW, PGW, IMS(SIP),HSS,PCRF – Uu, X2,S1-MME,S11,S6a, Gx etc

·               Test & Support VoLTE Call flows between LTE network entities and execute TOL/TI at Qualcomm LAB, Customer Lab and Customer Live networks for SW certification and PoC(Proof of Concept)

 

  Ericsson US –AT&T Labs, Redmond, WA May 2011 – March 2015 (Fulltime employment) as Engineer IV- Test lead

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·               Planning of project execution time during the initial establishment phase of the project based on the amount of the work from customer.

·               During the execution phase initial configuration is validated in lab environment. I used manage daily assignment of work and interaction with other peers

·               Led presentations on LTE functionality roadmap, capacity and performance on a regular basis.

·               Developed innovative methods to model the impact of traffic evolution on LTE, WCDMA RAN.

·               Technical lead for first office application (FOA) for the entire new production introduction in LTE and WCDMA domain.

·               Technical lead for LTE/HSPA RAN software technology trials in lab and production network.

·               Engaged with operator’s teams to support integration of customer’s operations and maintenance (O&M) tools with Ericsson’s LTE network infrastructure prior LTE launch.

·               Worked on HSPA RAN characteristics during various network congestion scenario

 

Ericsson Ireland & Sweden – Nov 2008 to April 2011 (Local Employment)

 

·               Good knowledge in Ericsson WCDMA RNC 3810, 3820, Sub- systems & flow message’s Experience in Real Network Environment test labs to test latest RNC software’s that support new HSPA+ features like 64QAM & MIMO. Executing the New Feature & legacy Test cases, analyzing test results & reporting RNC system level bugs to design team.

·               Acting as technical coordinator in resolving 3G RNC technical issues tracing & debug of RRC, NBAP, RANAP Messages & LAB Environment issues such as RF Calibration, Inter- RAT & IF Handovers. Extensive experience in Ericsson Network IOT LABS to test Latest Handsets that supports 3gpp standards & good interaction.

·               Functionalities and features testing for the RAN Nodes Testing. Commissioning of Ericsson Node-Bs and RNCs, integration and configuration of simulation tools like 3GSIM, CCN, RDBT, Aero flex, Net Hawk. Responsible for Integration, Verification and testing new 3G and 2G features. Test plan, documentation, instruction development and customer management Troubleshooting issues with RAB establishment, Throughput, Handover, Dropped RABs, failures

 

Wipro Technologies, Hyderabad, INDIA

Apr 2006- Oct 2008

·               Feature verification of Huawei RNC & Node-B (HSDPA, Soft handover, IFHO, RRC states) in the real environment. Protocol testing of Iu-PS interface towards sgsn ( RANAP, SCCP)

·               Design & Develop IOT test case scenarios for IU-PS Interface as per 3GPP 23.060 24.008 29.002 & executed testing. Design and execution of test, writing trouble reports and verifying the delivered corrections. Transport network Configuration such as ATM & IP on Iu & Iub Links. Configuring Packet Core Interfaces Iu-PS,Gr, Gs, Gn, Gd for Control Plane & User . Configuring of Cisco 7206 router that acts as IP Transfer Point (Sigtran ) to convert SS7 over MTP3b to SS7 over IP stack to support Starent all IP SGSN. Involved in Customer Acceptance test Cases for 3G UMTS Packet Core SGSN, GGSN.

 

Airtel Ltd, Chennai          Nov 2003 – May 2005

·               Provisioning & testing of SDH links (E1, E3, and DS3 & STM-1 Circuits through Preside NMS & EMS NORTEL TN16X, TN-16XE, TN-1X, TELLABS 6350, and ECI XDM-100 NMS.) on SDH Layer. •

·               Planning and Implementing Protection Mechanism’s such as SNCP, MSP 1+1 and MS-SP Ring.

·               Commissioning & Integration of NORTEL TN-1X, 4XE, 16XE, ECI XDM- 100, TELLABS, SDH & CWDM, Metro & Long haul DWDM Equipments to NMS.

·               Worked as a Cell Site/OMC-R Engineer performs new CDMA BTS, Commissioning Integration, and Carrier growth, Troubleshooting, Operation and Administration of Flexent Modcell 3.0 Base Stations that also includes.

 

Bachelor of Technology in Electronics and Communication Engineering (2003-2006)

Diploma in Electronics and communication engineering. (1994-1997)