Carrier Aggregation Introduction: Carrier Aggregation is a feature which came into 3GPP Release 10. It is part of the feature of LTE- Advanced which is a common term used to describe the improvements in LTE. The focus of Release 10… Read More ›
MIB (Master Information Block) MIB – Master Information Block Periodicity – 40 ms at RRC (10 ms at Physical Layer) Location – 1st Subframe 2nd Time Slot First 4rth OFDM Symbol Channel – PBCH Information Elements (I.E)- SFN Number of… Read More ›
LTE Architecture and its Network Elements Below is the LTE architecture 2G-3G-LTE Function of LTE Network Elements The Function of the eNodeB Radio resource management (RRM) radio bearer control mobility management admission control dynamic resource allocation Routing of user plane… Read More ›
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 ›
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 ›
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.Components of TAI TAC,MNC TAC,MCC MNC,TAC,MCC TAC,MNC Ans. MNC,TAC,MCC 2. ERAB Consist of S1 and S5/S8 Bearer Radio and S5/S8 Bearer Radio and S1 Bearer S1, Radio and S5/S8 Bearer Ans. Radio and S1 Bearer 3. Default bearer uses Non-GBR… Read More ›