5G Core Network Standardization 2018.09.18 @TAICS
For TAICS Sharing 2018.07.26 New Business Opportunities in 5G Era 2 Wearables VR/AR/MR Automotive Smart City Data,, Data,, Data 2/3/4G establish the value of mobile data to human society 5G to further differentiate the data for various applications higher rate, lower latency, more reliable, larger capacity
5G Commercialization - Start from embb, toward URLLC and mmtc 3 Evolution from existing 4G MBB business with more use cases (e.g. smart phone, CPE, telemetric, VR/AR ) New business cases especially in IoT area (e.g. auto-driving, drone, smart factory ) embb URLLC 1 st wave 5G = embb + URLLC NB-IoT and emtc to cover LPWA (Low Power Wide Area) applications for 5G mmtc Leverage existing 4G MBB market space, further develop new business
4 Introduction of 5G Core Network AUSF N13 UDM EPC EPC <> 5GC Correspondence 5GC N14 N12 N8 N10 N15 MME AMF + SMF + AUSF N1 AMF N11 SMF N7 PCF N5 AF N16 N2 N9 N4 SGW UPF PGW UPF PCRF PCF NG-(R)AN N3 UPF N6 DN HSS UDM HSS S5 EPC 5GC S10 MME NG11 S6a SMF PCRF Rx AF EPC-NAS N1 S1-MME N2 S1-U N3 EPC-NAS S1- MME E-UTRAN S1-U S5 S11 SGW S5/S8 Gx PGW SGi DN S11 N4 Rx N5 SGi N6
Protocol Stack (Control Plane) 5 NLg / -Ngmlc N15 / -Npcf N20 / -Nsmsf N11 / -Nsmf NAS- SM NAS- SM SMS UE Policy LCS SMS UE Policy LCS NAS-MM NAS Transport NAS-MM Lower Layer Lower Layer UE AMF SMF SMSF PCF GMLC
6 Protocol Stack (User Plane) Application PDU Layer PDU Layer 5G-AN Protocol Layers 5G-AN Protocol Layers Relay GTP-U UDP/IP L2 GTP-U UDP/IP L2 Relay 5G UP Encapsulation UDP/IP L2 5G UP Encapsulation UDP/IP L2 L1 L1 L1 L1 UE 5G-AN UPF UPF (PDU Session Anchor) PDU Layer: IPv4, IPv6, Ethernet, Unstructured N3 N9 N6
7 Protocol Stack (AS Layer) Control Plane User Plane UE gnb AMF UE gnb NAS NAS SDAP SDAP RRC PDCP RLC RRC PDCP RLC (Access and Mobility Management Function) PDCP RLC PDCP RLC MAC MAC MAC MAC PHY PHY PHY PHY SDAP (Service Data Adaptation Protocol) layer Mapping between a QoS flow and a data radio bearer Marking QoS flow ID (QFI) and reflective QoS (RQoS)
Interworking between EPS and 5GS 8 HSS + UDM EPC 5G CN EPC NAS S1 EPC NAS S1 EPC NAS N1 N2/ N3 N2/ N3 N1 E-UTRAN E-UTRAN NR EPC UE (E-UTRAN only) EPC UE (E-UTRAN + 5G RAN DC) N1 UE (E-UTRAN with or without 5G RAN DC) N1 UE (NR with or without DC with E-UTRAN)
5G System Architecture Options 9 S t a n d a l o n e ( S A ) O p t i o n s N o n - S t a n d A l o n e ( N S A ) O p t i o n s 5G CN 5G CN EPC Option 3 Option 2 Option 5 LTE enb NR gnb NR gnb NR gnb connected to 5G CN LTE enb LTE enb connected to 5G CN Data flow aggregation across LTE enb and NR gnb via EPC OPTIONS TYPE CORE RAN Option 3 NSA EPC DC (LTE anchored) Option 2 SA 5G CN NR Option 4 NSA 5G CN DC (NR anchored) Option 5 SA 5G CN E-UTRAN Option 7 NSA 5G CN DC (LTE anchored) Option 4 NR gnb 5G CN LTE enb Data flow aggregation across NR gnb and LTE enb via 5G CN Option 7 LTE enb 5G CN NR gnb Data flow aggregation across LTE enb and NR gnb via 5G CN
5G Standardization Timeline 10 2017 2018 2019 2020 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Rel-15 NSA (option-3) freeze Rel-15 NSA (option-3) ASN.1 Rel-15 SA (option-2) freeze Rel-15 SA (option-2) ASN.1 Rel-15 late drop freeze Rel-15 late drop ASN.1 Rel-16 SI Rel-16 SI/WI phase Sep. Release --> NR SA (option 2), EN-DC (option 3), and elte (option 5) late drop --> NE-DC (option 4), NR-NR DC, NG-EN-DC (option 7) Rel-16 freeze Rel-16 ASN.1
11 Tradeoff and Challenges SA vs. NSA EPC N26 5G CN EPC Option 2 Option 3 LTE enb NR gnb LTE enb NR gnb Standalone (SA) Non-Standalone (NSA) Spec Option2 ready by 18 Q3 Option3 ready by 18 Q1 Advantage - Simpler migration - Leverage LTE coverage - Simpler solution (only NR UP) Challenges - 5G CN for Day-1 - Extra signaling loading to LTE - Higher CAPEX - Uncertain migration path