Books Summary by Bibliophile Parul

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Please click on the below Link for Motivational Books Summary by Bibliophile Parul





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5G Deployment Option-7/7a/7x

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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 7: Deployment Option 7 represents a deployment scenario in which the Next Generation Core (NGC) will be used with a mixture of LTE and NR radio.  Next Generation signaling will be used but it will be routed via the LTE RAN because the LTE network is more fully built out and thus more reliable for handling signaling.  Options 7 and 7a differ on whether the user plane data is sent to NR directly or via the LTE RAN. 7/7A/7X require an eLTE upgrade of the existing LTE network at the start. (Difference is UP path Non Standalone ( Dual Connectivity 4G/5G ) Option 7/7A: NSA NR in 5GS. This option is particularly a...
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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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Power Saving Mode (PSM) Part I

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Home                 LTE                NB-IoT            5G(NR-NSA)   What is PSM in NB-IOT? It is a mode through which the UE notifies the network of its indefinite dormant state. Power Saving Mode (PSM) was introduced in 3GPP Release 12 24.301-5.3.11, to improve battery life of IOT devices. PSM is similar to power-off, with the exception that the UE remains registered with the network and there is no need to re-attach or re-establish the PDN connection. Is UE(device) reachable in PSM? UE is unreachable in PSM for mobile  terminating services. UE(device) is reachable for mobile terminating services only for the period of an Active Time after a mobile originated event like data transfer or signaling.  E.g. After a periodic TAU/RAU procedure. Does PSM support CS domain? / Limitations of PSM...
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Authentication in LTE

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Home                 LTE                NB-IoT            5G(NR-NSA)   What is Authentication and what type of Authentication is used in LTE? Authentication is a process by which both the UE and Network check whether the other party is authorized to communicate with them. In LTE and WCDMA, a mutual authentication process is used i.e. the Network checks whether the UE is authorized to camp on it and the UE also checks whether it is trying to camp on is the correct Network. The UE becomes authorized to camp on a network by subscribing to the network. In LTE, EPS AKA i.e. Authentication Key Agreement procedure is used for Mutual Authentication. Why is Authentication required from both sides in LTE? The UE needs to be authenticated by the NW to check whether it has subscribed to the NW or not. Only UEs which have a valid subscription shou...
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cell selection part-2

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Home                 LTE                NB-IoT               5G(NR-NSA) In this section, we will learn about cell selection criteria for SA and LTE. How is cell selection criteria defined? The cell selection criterion which is abbreviated as S in normal coverage is fulfilled when: Srxlev > 0 AND Squal > 0 Where: Srxlev = Qrxlevmeas – (Qrxlevmin + Qrxlevminoffset) – Pcompensation - Qoffsettemp Squal = Qqualmeas – (Qqualmin + Qqualminoffset) - Qoffsettemp Where: Srxlev Cell selection RX level value (dB) Squal Cell selection quality value (dB) Qoffsettemp Offset temporarily applied to a cell (dB) Qrxlevmeas Measured cell RX level value (RSRP) Qqualmeas Measured cell quality value (RSRQ) Qrxlevmin Minimum required RX level in the cell (dBm). If the UE supports SUL...
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Control Plane CIoT EPS optimization

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Home                 LTE                NB-IoT            5G(NR-NSA) Hi Guys today we are learning about  Control Plane CIoT EPS optimization  in detail for NB-IoT, For more update Please visit our NB-IoT page . Control Plane CIoT EPS optimization: In order to reduce the total number of control plane messages when handling a short data transaction, user data or SMS messages is conveyed to the IOT services via MME by encapsulating them in NAS messages. There are two paths through which, user data or SMS can be transmitted on the Control Plane CIoT EPS optimization: UL data are transferred from the eNB (CIoT RAN) >> the MME >> the Serving Gateway (SGW) >> the Packet Data Network Gateway (PGW) >> IOT Services UL data are transferred from the eNB (CIoT RAN) >> the MME >> the Service Capability Exposu...
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DRX (Discontinuous Reception)

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Home                 LTE                NB-IoT            5G(NR-NSA)   What is DRX and DRX active period? What channels does it monitor in active period? Data transmission between UE and their base stations(eNodeB) uses radio frames with10ms duration, where in each radio frame consists of 10 1ms( 1 frame=10ms duration=10 subframe) subframes. Physical Downlink Control Channel (PDCCH) at the beginning of each subframe indicates whether there is data for UE to receive or not. Devices has to monitor these PDCCHs in each subframe so that it can find out whether they carry any data to receive. Because devices do not receive data in every subframe, this monitoring process naturally leads to high battery consumption.  What is the purpose of DRX? The main purpose of DRX is to lower battery consumption when there is no UL/DL...
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