Job
Title: Senior 5G Network level Engineer (E2E RAN experience )
Location:
Bangalore
Experience
:
5-10years Domain
:
5G RAN / Small Cells /
Protocol Stack
Role
Summary
We
are looking for a technically superior 5G Engineer who bridges the gap between
standardization
theory
and
practical network implementation
. You will not just
execute tests; you will validate the 5G Small Cell system against strict
3GPP
Release 15/16/17 specifications
and IETF RFCs. You will be responsible
for E2E system testing on real network elements, using your deep knowledge of
the protocol stack and AI-driven automation to debug complex Call Processing
and Interoperability issues.
Core
Technical Competencies (The "Must-Haves")
1.
Good 3GPP & Protocol Knowledge:
-
Spec Literacy:
Ability
to read, interpret, and debug against specific 3GPP Technical
Specifications, specifically:
-
TS 38.331 (RRC):
Deep
knowledge of SIBs, RRC Setup, Reconfiguration, and Measurement Reports.
-
TS 38.413 (NGAP) & TS 38.423 (XnAP):
Handling Core Network signaling and Inter-gNB
communications.
-
TS 24.501 (NAS):
Understanding
Registration, PDU Session Establishment, and Service Requests.
-
IETF RFCs:
Understanding
of Transport and Security protocols for SeGW integration, including
IKEv2,
IPsec (ESP/AH), and SCTP
.
2.
RAN Feature Expertise:
-
Complex Call Processing:
Proven expertise in debugging the full lifecycle
of
ENDC (NSA)
and
SA Option 2
flows.
-
Mobility Algorithms:
Technical
understanding of Event A3/A4/A5 triggers, Handover Command/Complete flows,
and failure scenarios (Radio Link Failure, HO ping-pong).
-
Advanced Features:
Setup
and debugging of
CBRS (SAS/Domain Proxy interactions)
, VoNR, EPS
Fallback, and PTP (1588v2) synchronization.
Key
Responsibilities
-
Standards-Based Validation:
-
Execute E2E test plans on
real gNB and Femto
Gateway hardware
, ensuring every signaling message complies with
defined standards.
-
Analyze protocol traces (L2/L3) to identify deviations
from 3GPP specs during feature integration.
-
Root Cause Analysis (RCA):
-
Use
QXDM, Wireshark, and QCAT
to dissect
logs at the bit-level (ASN.1 decoding).
-
Debug intricate issues such as Throughput drops
(RLC/MAC layer analysis), S1/NG setup failures, and Security Gateway
tunnel establishment issues.
-
Automation & AI-Assisted Engineering:
-
Python/Robot Framework:
Write scripts to automate complex protocol flows
(not just UI automation).
-
AI Integration:
Leverage
AI tools (LLMs) to parse large PCAP files, generate regex for log mining,
and summarize complex failure signatures from regression data.
-
Network Element Configuration:
-
Full ownership of Lab setup including
cOAM
configuration
, Certificate Management for SeGW, and Core Network
(5GC/EPC) simulator tuning.
Tools
& Technologies
-
Protocol Analyzers:
Wireshark
(Advanced filters/Lua scripting), QXDM, QCAT, XCAL/XCAP.
-
Scripting:
Python
(Pandas for log analysis, Scapy for packet manipulation), Shell scripting.
-
Standards:
3GPP
Rel 15/16, IETF RFCs (IPsec/Networking).
