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 ›
5G
5G-NR Q&A (20/10/2020)
1. In 5G-NR Extended Cyclic Prefix (CP) is supported in which subcarrier spacing 15 kHz 60 kHz 120 kHz 240 kHz Ans. 60 kHz 2. In 5G-NR when we are using numerology-2 what would be the Slot length? 0.25 ms… Read More ›
5G-NR Q&A (15/10/2020)
1.In 5G, UE in RRC IDLE cannot move to RRC INACTIVE FALSE TRUE Ans. TRUE 2. 5G-S-TMSI is allocated by SMF AMF UPF AUSF Ans. AMF 3. What does CSI consist of in 5G-NR CQI,RI,PMI LI,CRI SSBRI,CQI,RI,PMI,LI,CRI CQI,LI,RI,PMI Ans. SSBRI,CQI,RI,PMI,LI,CRI… 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 ›
5G-NR RACH (Random Access Procedure)
5G-NR RACH (Random Access Procedure) Random Access Procedure RA Procedure is of two different types. Contention based RA Procedure Contention Free RA Procedure Contention based RA Procedure In CBRA, the UE randomly selects an RA preamble from a pool of… Read More ›
5G NR-(MIB/SIB)
5G NR-(MIB/SIB) System information System Information (SI) is consisting of 2 parts- MIB (Master Information Block) SIBs (System Information Block) In NR there are two version of SIBs . One being transmitted periodically same as LTE Other one is transmitted… 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 ›
5G-NR SRB (Signaling Radio Bearers)
5G-NR SRB (Signaling Radio Bearers) SRB (Signaling Radio Bearer) For carrying signaling message the type of bearer that required is known as SRB (Signaling Radio Bearer). The SRBs are radio bearers that are used for the transmission of RRC and… Read More ›
5G-NR Radio Network Temporary Identifier (RNTI)
UE and Network Identifiers NR UE uses temporary identifiers to communicate gNB. RNTI is 16-bit identifier and its value depends on type of RNTI. Many RNTI of LTE and NR are same. Below are the identifiers as per 38.321 for… Read More ›