NB-IoT

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  1. NB IoT23 June 2019 at 22:25

    Nice blog... NB IoT on a licensed spectrum means improved reliability for users as well as the guaranteed resource allocation needed for managed QoS.

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DSS Part-1

Home                 LTE                NB-IoT               5G(NR-NSA) In this article, we will discuss about Dynamic spectrum sharing abbreviated as DSS What is spectrum refarming? It is the process of redeploying spectrum from available users and re-allocating it to others. Legacy technology must be eliminated from a part of the spectrum, which must then be allocated for the new technology. It was not possible for operators to share the spectrum between different technologies but, spectrum refarming from LTE to 5G will be simpler with Dynamic Spectrum Sharing (DSS) which is introduced in 3GPP r15.  5G and LTE can occupy the same spectrum band from the control channel point of view, and the resources are allocated dynamically between the two technologies depending on the instantaneous device distribution and capacity needs. As many LTE bands ...
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cell selection part-2

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5G Deployment Option-3/3a/3x

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Home                 LTE                NB-IoT            5G(NR-NSA)   Hi Guys today we are learning about 5G deployment options, if you want to know more about other 5G deployment option please  click here Option 3: EN-DC (EUTRA-NR Dual Connectivity) Option 3 represents a network having both LTE and NR radio access, but using only the EPC core of LTE to route the Control signals. In this option, LTE is used as the control plane anchor for NR, and both LTE and NR are used for user data traffic.(user plane). It could also be called as Non-Standalone (NSA) NR in Evolved Packet System. The only difference between Options 3 and 3A is based on whether the user plane data is sent to NR directly or via the LTE RAN. This standardization was concluded in 3GPP Rel-15. This is a possible first step in the migration towards 5G-SA. This option wi...
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DSS Part-3

Home                 LTE                NB-IoT               5G(NR-NSA) DSS: Other NR UE features that are considered important for an efficient operation of spectrum sharing are: PDCCH in symbol 2 Rate matching pattern to map around LTE PSS/SSS and PBCH TRS in symbol 6 and 10 Flexible CSI-RS placement Alternative PDSCH DM-RS pattern when LTE CRS rate matching is configured 7.5 kHz UL shift DSS will help a mobile operator to flexibly allocate existing spectrum across low-, mid- and high- frequency bands, by dynamically switching between 4G LTE and 5G NR coverage based on traffic demand.Mobile operators can hold DSS to deliver the best possible performance and coverage for a mix of 4G and 5G devices. How LTE overhead can be avoided? 5G capacity is impacted by LTE Cell Reference Signals (CRSs),PDCCH, PSS, SSS, PBCH and MBSFN subframe...
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DSS Part-2

Home                 LTE                NB-IoT               5G(NR-NSA) DSS: When it comes to deploying 5G, spectrum is a key differentiator for operators. And while 24 GHz millimeter wave (mmWave) spectrum is being auctioned specifically for 5G, mid-band spectrum will be critical for operators to get widespread 5G coverage across their markets.  That’s why a technology called DSS (dynamic spectrum sharing) is so compelling. This technology, which is part of the 3GPP Release 15, allows operators to dynamically allocate some of their existing 4G LTE spectrum to 5G and use existing radios to deliver 5G services by deploying a software upgrade. DSS allows 4G and 5G to exist simultaneously on the same band while adjusting the bandwidth allocated to each generation dependent on demand. This is clearly ideal for low-band rollout, as it will allow ope...
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HARQ Basic Part-1

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cell selection part-1

Home                 LTE                NB-IoT               5G(NR-NSA) In this section, we will learn about cell selection basics for SA and LTE. What is cell selection? If a device is under circumstances where UE needs to be switched on or after UE has left RRC connected mode or UE returns to a coverage area, it sees many base stations around it. Many a times UE might be surrounded by multiple base stations from different operators. So from this many base stations, UE can register to only one cell. So to register to a specific cell UE goes through a dedicated process. This specific decision making process where UE decides to which cell to camp on is known as cell selection. Is the initial cell selection procedure reacquired in the case of NSA ? When UE is connected to MCG that time only cell selection procedure is reacquired. Note: ENDC cel...
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