Bilel Ben Hassen
Kelibya
Summary
RAN Performance Engineer with 5+ years of experience performing multi-vendor (Nokia, Huawei) 2G/3G/4G/5G networks. Expert in KPI analysis, root cause investigation, and propose parameter optimization to drive significant improvements in network quality, capacity, and customer experience. Proficient in OSS tools and data analysis.
Overview
16
16
years of professional experience
Work History
RAN Performance Engineer
Ooredoo Tunisia
01.2021 - Current
- Performance Monitoring & KPI Management
- Monitored and analyzed daily and weekly RAN performance KPIs (Accessibility, Retainability, Integrity, Mobility, Utilization) using OSS tools (Nokia NetAct, Huawei MAE/U2020).
- Defined and tracked key performance indicator (KPI) targets to maintain and improve overall network health and user experience.
- Created and automated comprehensive performance reports and dashboards for various stakeholders, from technical teams to senior management.
- Propose interactive actions to improve performance
- Identified and diagnosed performance degradation and capacity issues through deep-dive analysis of network counters and traffic trends.
- Managed performance at the cell level and identify underperforming cells
- Incident & Escalation Management
- Provided second-level support for complex RAN performance issues, investigating and resolving service-affecting incidents.
- Correlated performance alarms with KPI degradation to rapidly identify root causes and restore service.
- Network Change Validation & Support
- Validated the impact of software upgrades, new features, and network expansions (2G/3G/4G/5G) on network performance and stability.
- Worked closely with RF Planning and Deployment teams to ensure new sites are optimally integrated into the live network.
- Process Improvement & Automation
- Created reports to streamline data collection, analysis, and reporting tasks.
- Contributed to the continuous improvement of investigation processes and methodologies.
Radio Drive Test & Benchmarking Engineer
Ooredoo Tunisia
03.2014 - 12.2020
- Field Measurement Planning & Execution
- Planned and executed extensive drive-testing campaigns across urban, suburban, and rural environments to assess coverage, quality, and service availability.
- Conducted rigorous benchmarking tests against competitor networks to evaluate comparative performance on voice call quality, data speeds, and service reliability.
- Configured and operated specialized drive test equipment (SwissQual, Nemo IN/Outdoor) and mobile devices to collect network signaling and performance data.
- Data Analysis & Problem Identification
- Analyzed post-processed log files using tools like Actix Analyzer, Nemo Analyze, and NQDI (for Swissqual) to identify root causes of network issues such as dropped calls, poor voice quality, and slow data rates.
- Mapped performance data to geographical locations to pinpoint specific areas of weak coverage, pilot pollution, and handover failures.
- Correlated drive test data with network statistics (from OSS) to validate internal KPIs with real-user experience.
- Reporting & Insight Generation
- Authored detailed technical reports and executive summaries on network performance and competitive benchmarking findings.
- Presented data-driven insights and recommendations to optimization teams and management, directly influencing network improvement strategies.
- Created clear visualizations (maps, charts, graphs) to effectively communicate complex performance issues to non-technical stakeholders.
- Validation & Support
- Validated the impact of network changes, such as new site deployments, antenna tilts, and parameter adjustments, through pre- and post-drive testing.
- Supported the optimization team by providing precise field data to fine-tune cell parameters and improve key performance indicators (KPIs).
- Provided key data for customer complaint investigations and special event network planning.
Customer Advisor
Ooredoo Tunisia
03.2010 - 02.2014
- Served as the first point of contact for customers, proactively addressing inquiries and resolving issues related to billing, network coverage, service activation, and troubleshooting.
- Managed a high volume of customer interactions via multiple channels (in-store, phone, email, chat), consistently achieving high satisfaction ratings.
- Diagnosed technical issues and provided clear, step-by-step guidance, effectively reducing the need for technical escalations.
- Maintained accurate customer records and managed confidential information in the company's CRM system.
- Stayed current with the latest products, services, technologies, and competitor offerings to provide authoritative advice.
- Collaborated with technical and backend teams to escalate and track complex issues to resolution.
Education
Telecom engineering degree -
Private higher school of technology and management-SupTech
06.2021
Bachelor - Science and Technology
Faculty of Mathematical, Physical and Natural Sciences of Tunis
06.2011
High school diploma - undefined
ElHaouaria Secondary School
Haouaria, Nabeul06.2005
Skills
- Radio Access Network (RAN) Expertise: In-depth knowledge of 2G, 3G, 4G LTE, and 5G NR technologies
- Performance Monitoring: Expertise in using OSS platforms (Nokia NetAct, Huawei MAE/U2020)
- KPI Management & Analysis: Deep understanding of key performance indicators (Accessibility, Retainability, Mobility, Integrity)
- Data Analysis & Reporting: Advanced skills in processing network statistics and creating performance reports
- Drive Testing & Field Measurement: Proficiency with SwissQual and Nemo tools
- Network Benchmarking: Competitive analysis and comparative performance evaluation
Languages
English (Intermediate)
Frensh (Operational)
Arabic (Bilingual)
Timeline
RAN Performance Engineer
Ooredoo Tunisia
01.2021 - Current
Radio Drive Test & Benchmarking Engineer
Ooredoo Tunisia
03.2014 - 12.2020
Customer Advisor
Ooredoo Tunisia
03.2010 - 02.2014
Bachelor - Science and Technology
Faculty of Mathematical, Physical and Natural Sciences of Tunis
High school diploma - undefined
ElHaouaria Secondary School
Telecom engineering degree -
Private higher school of technology and management-SupTech