1. eNB and gNB.
1. eNB is the LTE access network.
2. eNB should atleast need to be 3GPP Release 15 or above to connect to a 5G network
3. eNB supports legacy e-utran interfaces like S1, X2 and does not support new interfaces like NG, Xn.
1. gNB stands for Next generation NodeB.
2. It is the 5G access network from 3GPP Rel-15.
3. It provides New Radio (NR) user plane and control plane protocol terminations towards the UE.
4. It is connected via the NG interface to 5GC.
5. gNB will not support legacy E-UTRAN interfaces.
2. 5G New Radio.
5G NR has been defined in 3GPP in 38 series.
5G NR has no backward compatibility with LTE.
NR is the RAT (Radio Access Technology).
3. NG-RAN: Next Generation Radio Access Network.
4. EN-DC: E-Utra-NR Dual Connectivity
MR-DC Multi-Rat Dual Connectivity
NE-DC NR-E-UTRA Dual Connectivity
5. ng-eNB: Next Generation eNodeB
It is a EN-DC for rapid deployment of 5G using current 4G LTE networks. Here 5G gNB connects to the 4G Core network.
Here 4G eNB will act as MeNB (Master Node) and en-gNB is used as a Secondary Node (SgNB).
1. NG-RAN can be a gNB or ng-eNB
Here gNB will provide NR user plane and control plane to UE
Here ng-eNB will provide E-UTRA user plane and control plane to UE
Both gNB and ng-eNB are connected via Xn interface.
7. In future there will be stand alone 5G architecture and a 5G system is defined as a 3GPP system consisting of 5G Access Network, 5G Core Network and UE.
8. Massive MIMO: This concept will effectively uses a large number of antennas to increase coverage and capacity.
9. Mobile mmWave: Beam-forming and beam tracking: It will enable wide mmWave bandwidths for great capacity and throughput.
3GPP TS 23.502 describes the procedures for the 5G system