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sa_nsa_deployment_models [2025/03/29 13:43] – kkaragozsa_nsa_deployment_models [2025/03/29 13:45] (current) – kkaragoz
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 After the call ends, your device re-establishes the 5G NR connection for data (if available). After the call ends, your device re-establishes the 5G NR connection for data (if available).
 +
 +===== 5G SA Architecture =====
 +
 +{{  :5g_sa_architecture_key_concept.png?400  }}
 +
 +Key Architectural Differences:
 +
 +Full 5G Core (5GC): SA uses the new 5G Core network (not 4G EPC) for both control and user planes.
 +
 +No 4G Dependency: All functions (voice/data) run natively on 5G without LTE anchors.
 +
 +Single RAN: Uses only 5G New Radio (NR) base stations (gNBs), not LTE eNBs.
 +
 +Key Components
 +
 +  * AMF (Access & Mobility Management Function): Handles connection management
 +  * SMF (Session Management Function): Manage user sessions.
 +  * UPF (User Plane Function):  Routes data traffic (It is the equivalent to 4G's PGW/SGW).
 +  * UDM (Unified Data Management): Authentication / Authorization
 +  * gNB: 5G base station
 +
 +What happens during a voice call process (VoNR)?
 +
 +  - Call Setup: Uses Voice over NR (VoNR) through IMS core without 4G fallback.
 +  - Data Continuity: Maintains 5G data connection simultaneously.
 +  - No Session Suspension: Unlike NSA, SA maintains full 5G capabilities during calls.
 +
 +SA Advantages:
 +
 +  * Ultra-low Latency (<;1ms theoretically)
 +  * Network Slicing Capabilities
 +  * True end-to-end 5G Security
 +  * Massive IoT Support (mMTC [Massive Machine-Type Communications])
 +  * Enhanced Mobile Broadband (eMBB)
 +
 +Deployment Challenges:
 +
 +  * Requires complete 5G core deployment.
 +  * Limited device ecosystem (though improving)
 +  * Higher infrastructure costs
  
  
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