Jio Spectrum Holdings
n78 (3.3-3.6 GHz, 100 MHz channel @ 30 kHz SCS, μ=1) — primary capacity carrier. n28 (700 MHz low-band) — primary coverage carrier. Pure Standalone (SA) architecture; no LTE anchor needed.
Jio Architecture
Jio uses cloud-native 5G core (Cisco UCC + others). RAN: cloud-native vRAN deployment with Samsung CMx + Nokia AirScale. Deep cloud integration for elasticity.
Numerology in Practice
n78 deployment: μ=1 (30 kHz SCS), 273 PRBs per 100 MHz cell, MCS Table 2 (256-QAM enabled). n28 deployment: μ=0 (15 kHz SCS), 51 PRBs per 10 MHz cell.
Throughput Targets
Per-cell DL peak: 1.5+ Gbps in n78 (4×4 MIMO, 256-QAM). Per-UE achievable: 800 Mbps to 1.2 Gbps in good conditions.
Engineer Skills Profile
PHY-level KPI tuning, beam optimization for 64T64R, BWP configuration for low-power IoT use, Standalone protocol stack knowledge (NSA → SA migration not needed but architecture differs from common LTE-anchored 5G deployments).
Common Interview Topics
How does Jio 5G handle handover from n78 to n28? (BWP switching + carrier aggregation + per-band RACH config). Why SA-first for Jio? (Latency, IoT readiness, network slicing potential.)