The user plane includes the data streams and the data bearers for the data streams. The data streams are characterized by one or more frame protocols specified for that interface. Figure shows “User-plane protocol stack” comprise Medium Access Control (MAC), Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC) and Physical (PHY) sub layers. Apart … Read more
The structure is based on the principle that the layers and planes are logically independent of each other. Protocol structures in UTRAN terrestrial interfaces are designed according to the same general protocol model. This model is shown in below. The structure is based on the principle that the layers and planes are logically independent of … Read more
LTE access network and E-UTRAN, the network comprises a eNodeBs, as shown in Fig. For the normal user traffic (as opposed to transmission), there is no centralized controller in E-UTRAN, thus, E-UTRAN architecture is called flat. The eNodeBs are usually inter-connected together through an interface known as X2, and the EPC interface through S1 – … Read more