Ghadir Chegini

Module testing

E2E entire system test, validation and verification, test results log trace analyzing, Identifying the bugs, root causing the reported errors from different verification and Quality Assurance activities of iPhons, Watches, iPads, AirPods and eSIM. Solving issues in wireless connectivity technologies such as Bluetooth, WiFi and Cellular. As wireless communication protocol expert helped improving scripting and test automation efficiency, and cross-functional collaboration, acting as interface between test team, developers, and other stakeholder

Executing Field, IOT and Mobile Operator Approval/Certification test cases in Network (NW) lab, live NW and test systems (NW Simulators) like Anritsu and Rhode&Schwarz. Supporting different testing methodologies (unit, integration, regression, performance, stress, E2E). Reporting the failures and tracking the bugs and the progress of the issue resolving. Analyzing, debugging and root causing issues based on the design specification and 3GPP standards. Analyzing Test Device and Network Simulator log trace files to identify the failure and where in the system it has occurred. Test case development based on end user scenarios, customer requirements, live NW behavior and design specification. Interfacing Development teams with Test teams and other stakeholders.

Secure expertise in NS (Network Signalling technology areas and develop relationship with NS design and development teams. Acting as interface to development team to transfer the knowledge from development teams to IOT/FT Test Engineers. Write Test Specification based on 3GPP Standards, functional and design specifications. Acting as Back Office giving support to the Test engineers at field and IOT labs, analyzing test results, secure quality of the reported errors, identifying and root cause the issues. System Test and log analysis of the UE against R99, R4, R5, R6 and R7 of Ericsson, Nokia Siemens, Alcatel Lucent and Huawei Networks, both in Lab and at the field. The analysis of the reported issues are based on the 3GPP specifications 25.321, 25.322, 25.331, 24.008, 23.107, 27.005 and many other when needed. The focus has been on the analysis on RRC signalling, decoding of RRC messages, and MAC/RLC PDU decoding. Issues from L1/FW/Physical Layo also have been analysed based on RSCP, EcNo, RSSI, BLER, SIR target, SIR requested, TxPower, TPC , CQI and HARQ. Analysing HSPA+ Throughput issues. executed test case in scenarios like Idle, Multi Service (Multi RAB), Voice, Video, SMS, Data Throughput both in mobility and stationary in lab and at field. Test cases executed: Idle Cell Selection/Reselection, Attach and Registration, Soft Handover, Intra/Inter-frequency Handover, IRAT, SRNS Relocation, Voice/Video call drops, Out Of Coverage, Throughput Measurement of HSUPA/HSDPA. Analyse test results log files, identify, root cause the erros and report to tester, developers and other stakeholders. Track the bugs until resolved. System performance and GSM/WCDMA Interoperability Test, NS interoperability test towards Network Vendors and Operators, focusing on GSM/WCDMA NS functionality and support for customer projects. Verification network signalling between the phone and the base station through tests with reference devices both in lab and in field test environments.