3GPP 5G architecture Within 3GPP standards, there is a clear functional separation between RAN and 5G core specified as the N1, N2 and N3 reference points. 5G RAN Sharing Architecture 5G RAN Sharing shall follow 4G, which includes MORAN and MOCN features. 5G NSA is the most suitable solution for 5G early deployment and for complementing NR coverage as full mobility with LTE is supported. NR, gNB, NG-RAN and 5GC - Why 5G is complex? The architecture also uses the evolved version of 4G-LTE Radio Access Network (eLTE eNB) and Core Network (EPC). Although, some types of gNB may connect to the 4G EPC instead of 5G Core. "early Rel-15 drop": focus on architecture option 3, also called non-standalone NR (NSA NR) which could be considered as the first migration step of adding NR base stations (called gNB) to an LTE-Advanced system of LTE base stations (eNB) and an evolved packet core network (EPC) i.e. But is this the whole truth? Not really, we also have en-gNB (version of NR gNB working under the EN-DC feature within architecture option 3, where the master is LTE eNB connected to EPC), and ng-eNB (version of LTE eNB capable of being connected to 5GC). 5G Radio Network Architecture In 5G, the RAN node is referred to as the Next Generation RAN (NG-RAN). 5G will also see several enhancements from Let us turn to the ng-eNB. Architecture 5G base station gNB. The NG-RAN consists of a set of radio base stations (known as gNBs) connected to the 5G core network (5GC) and to each other. Now one of the popular interfaces in 5G RAN is between RU and DU in 5G fronthaul architecture. 5GPPP Architecture Working Group View on 5G Architecture Version 2.0, December 2017 Date: 2017-12-15 Version: 2.0 5G Base stations) and ng-eNBs (i.e. N1 uses N2 to transport its traffic within the network. 3GPP has defined 5G architecture in TS 23.501 as illustrated in Figure 1 (below). It was Non-standalone 5G […] 38300 3GPP NR Release 15. Figure 1. 5G RAN Architecture The 3GPP 5G RAN architecture – specified in Release 15 and known as NG-RAN – introduces new terminology, interfaces and functional modules. A gNB-CU and a gNB-DU is connected via F1 interface. 5G NR overall architecture is shown in the following figure-2. As shown, NG-RAN composed of gNBs (i.e. The gNB-CU and gNB-DU modules are connected by a logical interface F1. 5G Non-Standalone (NSA) architecture was initially introduced by 3GPP, and its specification was completed in late 2017 to accelerate time to market. and finally in 5G we have next generation NodeB, but the short name is gNB. The gNB in its most basic form connects to the 5G Core network through the NG reference points although some types of gNBs may connect to the 4G EPC instead of 5G Core. The 5G System architecture consists of the following network functions (NF) majority of which constitute the 5GC: Authentication Server Function (AUSF) Core Access and Mobility Management Function (AMF) Data network (DN), e.g. Radio Access Network (RAN) node connects to the UPF and AMF The NG-RAN node is either a gNB or a ng-eNB, as follows Figure 6.1-1: Overall architecture. This has resulted in six connectivity options for a UE, as shown in Figure … 5g core network architecture 5g core network architecture 3GPP is a standard body that is defining both a new 5G core network (5GC) and a new radio access technology called 5G “New Radio” (NR). A gNB may consist of a gNB-CU and one or more gNB-DU(s). The gNB may consist of a Centralized Unit (CU) and one or more Distributed Units (DUs) connected to the CU via Fs-C and Fs-U interfaces for CP and UP respectively. The gNB handles radio communications with the 5G capable User Equipment (UE) using the 5G New Radio (NR) air interface. 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