ENDC -Dual Connectivity (EN-DC) which enables 5G services and 4G network. UEs supporting EN-DC can connect simultaneously to LTE Master Node eNB and 5G-NR Secondary Node gNB. UE first register with 4G EPC through ENDC. Based on UE supportability it… Read More ›
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 ›
Until the UE is paged and bearers are setup which node is responsible to buffer the packets for the mean time in LTE? A. PGW B. PCRF C. SGW D. Visited PCRF Where is PCEF situated? OCS UDR PDN GW… Read More ›
1.Is it possible to trigger re-establishment procedure without RACH procedure? A.YES B.NO 2. In which channel we get the DCI Info A. PDSCH B. DLSCH C. PDCCH D. PBCH 3. For Paging in LTE which protocol is responsible A. Diameter… Read More ›
LTE Protocol stack is divided into Three Layers. Layer 1 (Physical Layer) Layer 2 (PDCP,MAC,RLC Layers) Layer 3 (NAS and RRC Layers) Functions of each Layer. NAS: 3GPP TS 24.301 EPS bearer management Authentication Paging origination EPC connection management-IDLE mobility… Read More ›
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 ›
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 ›
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 ›
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 ›
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 ›