Live Case Studies You Explore in Apeksha Advanced Courses
- chetan sharma s
- 21 hours ago
- 12 min read
Live Case Studies You Explore in Apeksha Advanced Courses
Introduction
If you want to build a strong career in telecom—whether in 5G, ORAN, IMS, or Private Networks—there is one thing that matters more than degrees, certifications, or theory: real-world case studies. Employers don’t want engineers who can recite definitions; they want engineers who can solve actual problems using logs, tools, and analytical thinking. This is exactly why Live Case Studies You’ll Explore in Apeksha’s Advanced Courses have become so popular among freshers and professionals. In the first 100 words, it’s important to emphasize that the biggest transformation in learning today is the shift from “textbook knowledge” to “industry-grade scenarios,” and Apeksha’s training method places live case studies at its core. Live Case Studies You’ll Explore in Apeksha Advanced Courses
If you’ve ever wondered what a 5G registration failure log looks like, what happens inside the Core when a PDU session fails, how ORAN DU–CU integration is debugged, or how VoNR call drops are investigated—this article will give you a complete behind-the-scenes understanding. Apeksha’s advanced courses are famous for turning beginners into competent engineers by exposing them to real logs, real issues, and real troubleshooting frameworks. That’s why her students clear interviews faster, join top companies confidently, and excel in roles that demand analytical depth.
In the sections ahead, we’ll explore all the major case studies included in her advanced programs—each one designed to mimic real industry challenges telecom engineers face daily. Whether you are a fresher looking for clarity or a working professional seeking career growth, you’re about to understand how powerful hands-on learning can be.
Table of Contents
Why Live Case Studies Matter in Telecom
Live Case Studies You’ll Explore in Apeksha’s Advanced Courses
Case Study 1: 5G Registration Failure
Case Study 2: PDU Session Setup Issues
Case Study 3: 5G/NR Handover Failures
Case Study 4: VoNR Call Drop
Case Study 5: ORAN DU–CU Integration
Case Study 6: Low Throughput Root Cause
Case Study 7: Private 5G Deployment
Case Study 8: IMS Registration Failures
Case Study 9: Paging Delays
Case Study 10: Drive Test Log Interpretation
Tools Used in Case Studies
How Case Studies Build Job-Readiness
Apeksha’s Teaching Method
Industries Using These Case Studies
Student Success Stories
LSI Section
FAQs
Conclusion
Why Live Case Studies Matter in Telecom Training
Telecom is a field where theory alone cannot prepare you for real job responsibilities. You can study hundreds of pages about RAN, Core, IMS, and ORAN—but when you step into an interview or a live project, the first thing companies look for is whether you can interpret logs, understand call flows, and identify the root cause of network failures. This is why live case studies matter so much. They bridge the gap between theoretical knowledge and the real environment telecom engineers work in.
A common problem students face after completing degrees or generic telecom courses is that they still don’t understand what happens inside a network. They may know the definition of RRC or NGAP, but when a registration request fails or a PDU session doesn’t establish, they have no idea where to start troubleshooting. That’s exactly where Apeksha’s training approach shines. She brings live 5G SA logs, IMS logs, Wireshark captures, ORAN traces, and drive test outputs into the classroom and teaches students step-by-step how to decode them. Live Case Studies You’ll Explore in Apeksha Advanced Courses
Live case studies help you learn:
How to read signaling messages
How AMF, SMF, UPF, DU, CU, and IMS components communicate
Why failures happen
What parameters affect network performance
How to fix issues in a structured way
These are the exact skills companies look for in jobs such as RAN Engineer, Protocol Testing Engineer, Core Engineer, ORAN Specialist, and Private 5G Deployment Engineer.
Another reason case studies matter is that telecom problems are never identical. Each failure has unique behavior depending on UE capability, network configuration, vendor equipment, and even location. By exposing students to a wide variety of scenarios, Apeksha ensures her learners develop strong analytical thinking and troubleshooting confidence.
Simply put, live case studies transform students from “learners” into real engineers.
Live Case Studies You’ll Explore in Apeksha’s Advanced Courses
Apeksha’s courses stand out because they do not rely on simplified examples or outdated logs. Instead, students work with real network traces collected from live 5G deployments, ORAN rollouts, private networks, and enterprise-level IMS setups. This makes learning deeply practical and similar to what engineers experience inside companies like Nokia, Ericsson, Jio, Airtel, Samsung, and Mavenir.
Each case study is designed to teach one core problem-solving skill. Rather than memorizing theory, you learn how to see the network “come alive” through signaling, layers, and interfaces.
Here’s what makes her case studies so impactful:
They Reflect Real Industry Problems
These are not hypothetical situations. They are real failures taken from live telecom networks.
They Train You in Troubleshooting Frameworks
Students learn how to approach a problem using:
Step-by-step signaling breakdown
Layer-based decoding
Logical elimination
KPI correlation
Validation of root cause
They Prepare You for High-Paying Roles
Companies prefer engineers who’ve already handled real logs.
They Build Interview Confidence
Nearly every telecom interview includes log-based questions.Apeksha’s students answer them with ease because they’ve seen hundreds of cases already.
They Train You to Use Industry Tools
Every case study involves at least one major tool:
QXDM
Wireshark
Genex/TEMS
UERANSIM
Vendor-specific log tools
They Create Industry-Ready Mindsets
Instead of guessing, you learn to analyze systematically—just like real RAN, Core, and ORAN engineers.
By the end of the course, you won’t just know telecom—you’ll be able to work like a real telecom engineer.
Case Study 1: 5G Registration Failure Analysis
5G registration failures are one of the most fundamental case studies in any advanced telecom training. Registration is the first step a UE takes before accessing network services, and when it fails, nothing else can proceed—not PDU sessions, not voice calls, not mobility procedures. This is why Apeksha begins with one of the most essential troubleshooting scenarios.
In this case study, students learn to decode the complete chain of events between the UE and the network during registration:
RRC Connection Setup
NAS Registration Request
NGAP Initial UE Message
Authentication Procedures
Security Mode Command
Registration Accept/Reject
Students investigate failures such as:
IMSI not recognized
Authentication failure
Network slicing mismatch
AMF configuration issues
Wrong PLMN selection
UE capability mismatches
Using QXDM and Wireshark, students trace the exact signaling path to find the message where the issue originates. They also compare successful vs failed registration logs to sharpen their diagnostic skills.
Case Study 2: PDU Session Setup Troubleshooting
Once registration succeeds, the next major process is the establishment of a PDU Session, which enables internet connectivity and application services. In Apeksha’s advanced courses, this case study is one of the most eye-opening topics for students. They finally understand how data actually flows from the UE to the network and why failures occur.
A typical PDU Session involves:
NAS: PDU Session Establishment Request
NGAP: InitialContextSetupRequest
AMF → SMF: Session Setup
SMF → UPF: PFCP Session Establishment
UPF: Path configuration
SMF → AMF: Response
NGAP: SetupResponse
This case study helps you understand all the above steps through real logs.
Apeksha walks students through several real-world failures like:
DNS resolution issues (UE cannot reach internet APN)
SMF assignment problems (incorrect SMF selection)
UPF path misconfiguration (data plane failure)
DNN/APN mismatches
Authentication/authorization rejection
IPv4/IPv6 conflicts
S-NSSAI slicing problems
Using Wireshark, students analyze PFCP messages between SMF and UPF, which is a premium skill not commonly taught elsewhere. They also see how data paths are created, torn down, or modified.
By the end of this case study, learners can:
Identify exactly which message caused the failure
Understand whether the issue is signaling (control plane) or data plane
Solve problems using logical analysis instead of guesswork
This case study alone puts students far ahead in interviews, where PDU session failures are one of the most frequently asked topics.
Case Study 3: Handover Failures in 5G/NR
Mobility is the backbone of telecom networks. Whether you walk inside a mall, travel in a car, or move between buildings, your phone switches from one cell to another without dropping connectivity. But sometimes, handovers fail—and these failures affect user experience significantly. In companies, mobility debugging is often assigned only to skilled engineers.
Apeksha includes handover failure analysis as one of the most important case studies because it teaches students how RAN, Core, and UE interact during mobility.
In this case study, students learn the difference between:
Intra-frequency handover
Inter-frequency handover
Xn-based handover
NG-based handover
They explore real logs showing:
A3 events (signal comparison logic)
Time-to-trigger issues
Measurement gaps
Incorrect PCI configuration
Interference and overshooting cells
Timing advance problems
Failure due to poor RSRP/RSRQ/SINR
Target cell rejecting handover
Handover failures appear in interviews and real jobs alike, making this case study extremely important. Students learn to correlate drive test logs with 5G signaling logs to identify root causes.
By analyzing NGAP and RRC logs, they understand factors such as:
UE measurement reports
Handover command
Path switch request
Data forwarding
Once students master this case study, they gain confidence in mobility optimization—a high-demand skill for both public and private networks.
Case Study 4: VoNR Call Drop Scenario
Voice in 5G networks uses VoNR (Voice over New Radio), and it is far more complex than older VoLTE systems because it involves tight coordination between RAN, IMS, and the Core. Apeksha includes a complete VoNR call drop case study that helps students decode SIP, IMS registration, RTP, and interworking challenges.
This case study covers:
IMS Registration Process
SIP INVITE, 180 Ringing, 200 OK
SDP negotiation
RTP media flow setup
Bearer establishment
Students troubleshoot real failures such as:
IMS registration failure
One-way audio
Call drop after a few seconds
Failed VoNR to VoLTE fallback
TAC mismatch
Incorrect PDU session for IMS
Codec negotiation failures
SIP 4xx/5xx errors
Through this case study, learners see how multiple layers must work together for a stable voice call. They also learn to correlate SIP logs with RRC and NAS logs.
VoNR is one of the hottest skills today, and engineers with VoNR troubleshooting knowledge are in high demand across vendors, testing companies, and operators.
Case Study 5: ORAN DU–CU Integration Issue
ORAN is transforming telecom by making networks open, interoperable, and software-driven. But ORAN integration is not simple. DU (Distributed Unit) and CU (Central Unit) must communicate flawlessly through F1 interfaces, and any small mismatch can break the link.
This case study is crucial for modern engineers because ORAN jobs are growing rapidly.
Students learn about:
F1AP setup
M-plane issues
L1/L2 interoperability
Timing synchronization problems
Transport layer failures
RU → DU → CU pipeline issues
They explore failures like:
Incorrect IP configuration
Vendor mismatch
LLS split incompatibility
F1 Setup Failure messages
DU not receiving SIBs
CU failing during RRC Reconfiguration
This is one of the most advanced and valuable case studies, especially for those targeting ORAN companies like Altiostar, Mavenir, Radisys, Rakuten Symphony, and Samsung.
Case Study 6: Throughput Degradation in SA Networks
Low throughput is one of the most common complaints in 5G Standalone (SA) networks. Users may see the 5G icon on their phones, but the actual speed may be slower than expected. This is where engineers must diagnose the root cause using a combination of radio, core, and UE-level analysis. In Apeksha’s advanced courses, the throughput degradation case study is extremely detailed and practical.
Students work on scenarios involving:
MIMO configuration mismatches
Improper CSI reporting
Low SINR due to interference
Scheduling blocks issues
Incorrect TBS (Transport Block Size)
UE category/capability limitations
Fragmented spectrum allocation
NR-ARFCN misalignment
Beamforming inconsistencies
Apeksha also shows real logs from QXDM and drive test tools, where learners examine:
PDSCH allocation
MCS index
BLER percentage
HARQ retransmissions
RLC throughput vs MAC throughput
This case study teaches students how to correlate radio-level indicators with actual network throughput. They understand why users sometimes face low speed even when signal levels appear strong—because throughput is not decided by RSRP alone. It is influenced by dozens of parameters across layers.
By the end of this case study, students learn:
How to diagnose throughput issues step-by-step
How to separate radio issues from core issues
How to validate UE capability mismatches
How to propose optimization fixes
This is one of the most important case studies for RAN engineers, field testers, private 5G deployment teams, and optimization engineers.
Case Study 7: Private 5G Deployment Use Case
Private 5G is the fastest-growing domain in telecom today. Industries like manufacturing, logistics, defense, airports, hospitals, and smart campuses are setting up their own on-prem 5G networks for automation and security. That’s why Apeksha includes a full case study based on private 5G deployment—a highly valuable learning experience.
Students explore real scenarios involving:
Indoor coverage planning
On-prem 5G core deployment
Device provisioning
Traffic routing
Industrial robot connectivity
High reliability & low latency configuration
APN/DNN setup for enterprise applications
Integration with Wi-Fi 6
Slice creation for different departments
Key troubleshooting examples include:
UE not connecting to private network
Authentication failure with enterprise database
Incorrect TAC leading to handover loops
High packet loss in indoor factory environment
Interference from industrial machinery
PDU session denial due to slice mismatch
UPF local breakout configuration errors
Students see how private 5G differs from public 5G:
Traffic stays on local core
Security requirements are stricter
Latency expectations are higher
Coverage must be uniform across complex indoor spaces
By working through this case study, learners gain exposure to one of the highest-paying skill sets in telecom. Private 5G engineers are in strong demand worldwide, particularly in companies like Cisco, Nokia, HPE, AWS, Ericsson, Mavenir, and enterprise automation providers.
Knowing how to troubleshoot private 5G issues makes students extremely valuable in modern telecom roles.
Case Study 8: IMS Registration Failure
IMS (IP Multimedia Subsystem) manages all voice and video calling services, including VoNR and VoLTE. IMS registration failure is a major area of troubleshooting and appears frequently in interviews and real industry scenarios. Apeksha’s case study covers actual SIP traces and IMS logs, giving students deep understanding of the entire registration process.
Students analyze:
SIP REGISTER request
401 Unauthorized message
Authentication procedure
200 OK acceptance
P-CSCF / I-CSCF / S-CSCF interactions
Real-world failure scenarios include:
DNS not resolving P-CSCF
Wrong outbound proxy
SIP digest authentication mismatch
Incorrect IMPU/IMPI configuration
Missing VOLTE/VoNR PDU session
UE capability conflicts
APN/DNN configuration mismatch
IMS server rejecting UE profile
Students use Wireshark to decode SIP messages and identify which component is causing the failure. They also learn how IMS integrates with 5G Core, which is essential for modern voice services.
By the end of this case study, students are confident in analyzing IMS failures—a rare and highly valued skill. IMS engineers earn some of the highest salaries in telecom because few professionals understand SIP and IMS architecture deeply.
Case Study 9: Paging Delay Issues
Paging is the mechanism used by the network to reach the UE when it is idle. In 5G, paging becomes even more complex due to multiple slices, tracking areas, and power-saving features like DRX. When paging fails or becomes delayed, users experience missed calls, slow notifications, and service interruptions.
In this case study, students learn to analyze paging failures using logs from:
AMF
NGAP
NAS
RRC
UE-side captures
Students explore real scenarios involving:
Incorrect tracking area list
Mismatch between UE and network DRX cycles
Paging message not reaching DU/CU
TMSI changes not synchronized
UE camping on wrong cell
High RACH failures causing paging misses
Congested cells dropping paging messages
They also learn to correlate Radio KPIs with Core KPIs to identify whether the issue is radio-side or core-side.
This case study is incredibly valuable for RAN engineers, Core engineers, and private 5G specialists.
Case Study 10: Drive Test Log Interpretation
Drive tests remain a crucial part of telecom performance analysis, even in 2025. But drive test logs are meaningless unless an engineer knows how to interpret them. Apeksha trains students to connect drive test outputs with real signaling and KPIs, giving them complete clarity on radio behavior.
Students learn to read and interpret:
RSRP, RSRQ, SINR
CQI
PCI
Beam IDs
Serving vs neighbor cells
Throughput graphs
Coverage gaps
Handover events
Key troubleshooting topics include:
Cell overshooting
Poor indoor coverage
Cross-sector interference
Bad PCI planning
Call drops due to weak RSRQ
Capacity limitations
Students also learn how to generate detailed reports for operators and vendors—one of the most common job requirements for RAN engineers and DT engineers.
Tools You’ll Use During Live Case Studies
Apeksha’s advanced courses expose students to the exact tools used by major telecom companies.
Tools include:
QXDM for UE-side logs
Wireshark for protocol-level decoding
Genex/TEMS for drive test analysis
UERANSIM for 5G testing
ORAN test suites
Vendor-specific log analyzers
Students learn how to:
Capture logs
Decode messages
Filter failures
Export traces
Create analysis reports
Knowing these tools makes students industry-ready from day one.
How Live Case Studies Improve Job Readiness
This is where the transformation happens. Live case studies give students:
Problem-solving confidence
Interview-ready skills
Practical clarity on networks
Ability to work independently
Immediate employability
Most telecom jobs require log analysis. Students trained with case studies answer complex interview questions effortlessly.
Apeksha’s Teaching Method: Why It Works
Apeksha teaches with a step-by-step, visual, hands-on approach:
Real logs
Real failures
Daily mentorship
Interactive explanations
Repeated practice
Industry-aligned content
This is why her students succeed in roles across RAN, Core, ORAN, IMS, and Private 5G.
Industries That Use Similar Case Studies
Companies across the telecom ecosystem use the same troubleshooting techniques:
Jio, Airtel, Vi
Ericsson, Nokia, Samsung
Mavenir, Rakuten Symphony
Cisco, HPE
Private 5G enterprises
Testing companies like Keysight, Spirent
These case studies prepare students for all these environments.
Student Success Stories (Real Outcomes)
Students trained using these case studies have:
Landed 4.5–7 LPA as freshers
Switched from field to office roles
Transitioned into Core & ORAN
Secured international offers
Received remote global positions
This proves the power of practical training.
LSI Keywords (SEO Boosters)
5G log analysis
telecom troubleshooting case studies
ORAN training examples
PDU session failure explanation
VoNR call drops
NGAP NAS decoding
private 5G enterprise learning
FAQs
Q1: Are these case studies based on real telecom networks?
Yes, they come from live 5G, ORAN, and IMS deployments.
Q2: Do I need prior telecom knowledge?
No. Apeksha teaches everything step-by-step.
Q3: Will these case studies help in interviews?
Absolutely—log-based questions are common in interviews.
Q4: Which jobs need these skills?
RAN, Core, ORAN, IMS, Protocol Testing, and Private 5G.
Q5: Can non-technical students learn them?
Yes. Many successful students came from non-telecom backgrounds.
Conclusion
In today’s telecom world, success belongs to engineers who can analyze, troubleshoot, and solve real network issues. That’s why Live Case Studies You’ll Explore in Apeksha’s Advanced Courses are so powerful—they give you the practical skills employers want, the confidence needed for top-tier interviews, and the clarity to understand complex 5G, ORAN, IMS, and Private Network architectures. If you want a high-paying, future-proof telecom career, this hands-on learning approach is the smartest investment you can make. Start your journey now—and step into the industry as a job-ready telecom professional
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