Recent Posts - page 2
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LTE Q & A (15/10/2020)
1.S-TMSI is Combination of MME Code & M-TMSI MME Groupid & M-TMSI MME Groupid & MME Code None of the above Ans. MME Code & M-TMSI 2.What is the Range of SFN in LTE? 64 128 512 1024 Ans.1024 3.RRC… Read More ›
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LTE Subcarriers, modulation and Frame structure
LTE Subcarriers, modulation and Frame structure LTE subcarrier is the smallest independent part of an LTE signal. The smallest defined piece of an LTE signal is a single subcarrier is RE (Resource Element). Modulation scheme used in LTE. QPSK 16QAM… Read More ›
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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 ›
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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 ›
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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 ›
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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 ›
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LTE Handover Concept
Types of Handover in LTE Categorization of Handover (EPC Entities are Changed or not) in three kinds Intra-LTE Handover Inter-LTE Handover Inter-RAT Categorization of Handover (EPC Entities are Involved or not) in two types X2 Handover S1 Handover Basic Concept… Read More ›
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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 ›
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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 ›
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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 ›