TelecomStudy18

GnodeBFunction . ( This  MO  is the top level  MO  for  GNodeB  Functions.) GnodeBRpFunction (Radio Processing)   QciProfileEndcConfig Route from   QCI s to parameters that impacts   QoS   for Data Radio Bearers .   Radio Bearer  is just a virtual concept. It defines how the UE data/signaling are treated when it travels across the network.   Ej . In LTE there are two types of radio Bearer To carry signaling. There are called the SRB (Signaling Radio Bearer)   To carry user data. There are associated with an EPS Bearer   RadioBearertable : Container for radio bearer configurations .   User plane link for the radio processing interface.   System created when a radio processing user plane link is established .   System deleted when a radio processing user plane link is released .   RDN   of this   MO   is RpUserPlaneLink =[Local Ip Address ]_[ Remote Ip Address ].    RpUserPlaneTermination Local termination point of the ra

It ‘s possible to transmit the user plane between both nodes to the EPC but control plane is only possible on the ENDC side. GTP (GPRS Tunneling Protocol) . S1  user plane is tunneled between the  LTE  node and  SGW  using  GTP-U .  UDP (User Datagram Protocol) S1AP (S1 Application Protocol) SCTP (Stream Control Transmission Protocol)

In option 3 there are 3 deployment scenarios for NSA NR they consist of at least two nodes, one for LTE and one for NR. LTE-NR Dual Connectivity feature  -The LTE-NR Dual Connectivity feature introduces the support for  EN-DC  in the  NR  Node used in an  NSA  deployment. -The feature covers the fundamental interaction between  LTE  and NR in the  EN-DC  context. -The feature makes it possible to configure split  DRBs  with one leg in  LTE  and one leg in NR .   The benefits of this setup are the following:   Higher peak rate of network data traffic.   Sustainable capacity and performance growth. -CONTROL PLANE   Master Cell Group (MCG) SRB (SRB1, SRB2):  SRB (Signal Radio Bearer)   Direct SRB between the master node and the mobile device that can be used for conveying master node RRC messages which can also embed secondary node RRC configurations.   Split SRB (SRB1+SRB1S, SRB2+SRB2S):     SRB that is split between the master node and the s

The PBCH (Physical Broadcast Channel) carries the periodic downlink broadcast of the RRC MasterInformationBlock message. Note that system information from BCCH (Broadcast Control Channel) is scheduled for transmission in the PDSCH (Physical Downlink Shared Channel). The PDCCH (Physical Downlink Control Channel) carries no higher layer information and is used for scheduling uplink and downlink resources. Scheduling decisions, however, are the responsibility of the MAC layer, therefore the scheduling information carried in the PDCCH is provided by MAC. Similarly the PUCCH (Physical Uplink Control Channel) is used to carry resource requests from UEs that will need to be processed by MAC. The PHICH (Physical Hybrid ARQ Indicator Channel) is used for downlink ACK/NACK of uplink transmissions from UEs in the PUSCH (Physical Uplink Shared Channel). It is a shared channel and uses a form of code multiplexing to provide multiple ACK/NACK responses. The PCFICH (Physical Control

With the removal of the RNC from the access network architecture, inter-eNB handover is negotiated and managed directly between eNBs using the X2-C interface. In LTE implementations that need to support macro diversity, the X2-U interface will carry handover traffic PDUs (Protocol Data Units) between eNBs. X2-C (control plane) signalling is carried by the X2AP (X2 Application Protocol), which travels over an SCTP association established between neighboring eNBs. X2AP performs duties similar to those performed by RNSAP (Radio Network Subsystem Application Protocol), which operates between neighboring RNCs over the Iur interface in UMTS R99 networks. X2-U (user plane) traffic is carried by the existing GTP-U (GPRS Tunnelling Protocol – User plane), as employed in UMTS R99 networks. The facilities provided by the X2-U interface are only expected to be required if macro-diversity handover is supported.  Both sub-types of the X2 interface travel over IP: SCTP/IP for the X2-C and UDP/I