Tag: LTE Interview Questions
3GPP Evolution for MIMO
Released 3GPP standards on MIMO are shown in below image. As you know, Coordinated Multipoint (CoMP) is a type of Cooperative MIMO, in which data and channel state information (CSI) are […]
5G NR Stand Alone (SA) Requirement Analysis to Inter-Op with 4G
5G NR deployment option 2 as known as Stand Alone (SA) Architecture where 5G gNB connect to 5G Core network for all signalling and Data sessions. 4G LTE will coexist […]
Robust Header Compression – ROHC
ROHC is a header compression protocol/algorithm that can be used compress the header of different IP packets. In normal case without compression IPv4 header is 40 bytes and IPv6 header […]
Multi Carrier Cell Re-selection in LTE
Cell Re selection is a procedure used to change the cell after the UE is camped on a cell and stays in the Idle mode.This procedure is used to let […]
NB-IOT – Physical Broadcast Channel (NPBCH)
NPBCH stands for narrow band physical broadcast channel similar to PBCH in LTE Technology. The NPBCH is used to deliver the NB-IoT Master Information Block (MIB), which provides essential information […]
5G Absolute Radio Frequency Channel Number (NR-ARFCN)
An Absolute Radio-Frequency Channel Number (ARFCN) is a code that specifies a pair of reference frequencies used for transmission and reception in radio system. In a FDD system one ARFCN number is […]
3GPP Standards Releases
The 3rd Generation Partnership Project (3GPP) is a collaboration between groups of telecommunications associations, known as the Organizational Partners. These Organizational Partners are Association of Radio Industries and Businesses (ARIB) […]
3GPP Release 11
3GPP standards development falls into three principal areas: radio interfaces, core networks and services. 3GPP Release 11 standards were frozen in December 2012 with the core network, protocols in December […]
LTE Layer 3 (RRC Layer) Interview Questions
4G LTE Layer 3 is an important layer includes RRC (Radio Resource Configuration) at UE and Base station. In this post is for L3 RRC interview questions with answers. What […]
LTE Layer 2 (MAC,RLC,PDCP) Interview Questions
What is DRX and DRX active period? What channels does it monitor in active period? What is MAC-ContentionResolutionTimer – What is the start and end activity? What is HARQ RTT […]