1. How many S1AP ID is created in initial attach procedure of LTE? A. One B. Two C. Three D. Depends on resource availability 2. Volte Supported UE at the time of emergency call will create. … Read More ›
OPENRAN
What is CPRI & eCPRI ?
While the CU/DU split adds a lot of extra flexibility in how services are deployed, there is still an area of cost that needs to be optimized is the RU. Today, the interface between the BBU and RU in 4G… Read More ›
Functional split Option 7 & ORAN Alliance Specified Split option 7.2x
In this option as shown in Fig below the lower physical layer functions and RF circuits are located in the DU(s). The upper protocol layers including the upper physical layer functions reside in the CU. There are multiple realizations of… Read More ›
Types of Functional Splits in ORAN/5G NR
Types of Splits: We have three categories of splits High Layer Splits Low Layer Splits Double Splits High Layer Split: It consist of split 2,3,4 & 5.The benefits of opting this functional splits are drastically reduced bandwidth, latency tolerant i.e… Read More ›
Function Splits in ORAN/5G-NR:
Function Splits in ORAN/5G NR: Centralized baseband processing was introduced several years ago to ease installation of base stations in large buildings. Digital radio interfaces and remote radio heads (RRHs) both was enabled by it, which allowed the connection between… Read More ›
RU/DU/CU Architecture
Radio Unit Interface & Architecture : 5G NR radio unit shall be connected to DU through fronthaul RAN low layer split. The DU shall be connected to the CU which connects to the 5G enabled EPC to work along with… Read More ›
High Level Architecture of ORAN
As per WG1 ORAN alliance spec, figure shown below, the radio side includes Near-RT RIC, O-CU-CP, 17 O-CU-UP, O-DU, and O-RU functions. The E2 interface connects O-eNB to Near-RT RIC. O-eNB does support O-DU and O-RU functions with an Open… Read More ›
ORAN Introduction
Introduction Before understanding the architecture of ORAN, First we need to understand the LTE architecture which consist of EPC,eNB and the RF Antenna Unit. The functions in LTE RAN are split so that the Baseband Unit (BBU) and the Remote… Read More ›