5G NBIOT LTE Question Answers

Home                 LTE                NB-IoT            5G(NR-NSA) Hi Guys today we are learning about User  Plane CIoT EPS optimization  in detail for NB-IoT, For more update Please visit our  NB-IoT page . User Plane CIoT EPS optimization: The User Plane CIoT EPS Optimization is a functionality through which user plane data can be transferred without using the Service Request procedure to establish Access Stratum (AS) context in the serving eNodeB and UE. This method is based on User Plane transport of user data in which data is transferred over the conventional user plane through the network from the eNB to the S-GW and vice-versa. User Plane Data is transferred through the conventional route, i.e. through radio bearers via the SGW and the PGW to the application server. There is some overhead on building up the connection; however...

Home                 LTE                NB-IoT            5G(NR-NSA) Hi Guys today we are learning about  Types of DATA transfer in NB-IoT and CIoT EPS optimization in detail for NB-IoT, For more update Please visit our  NB-IoT page . What is attach with PDN for NB-IoT? As part of the attach procedure, the device is required to establish the PDN connection. This is the case with all 3GPP EPS (Evolved Packet System) releases up to Rel-13. What is attach without PDN for NB-IoT? Consider a scenario where a huge numbers of devices keep a connection inactive for very long period of time and seldom transmit data over it. Keeping this scenario in mind, a new capability had been introduced in 3gpp Rel-13 which allows UEs supporting CIoT optimizations to remain attached without PDN connection. A UE attached without PDN connection only ...

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...

Home                 LTE                NB-IoT            5G(NR-NSA) Hi Guys today we are learning SIB1 in detail for LTE. SIB1 Why SIB1 is required for initial attach process? Once uplink synchronization between the UE and the network has been established and the UE has read the MIB, the UE waits for System Information Block Type 1 (SIB1) which carries cell access related information and supplies the UE with the scheduling of other system information blocks. Reading SIB1 is mandatory for the UE to gain access to the network as the UE cannot know about the sequences it has to transmit in PRACH or the transmit power at which eNodeB is transmitting or the subframe/UL-DL pattern in case of TDD without decoding the SIB. If the UE is unable to decode SIB it will simply abandon that network Using which channel to transmit SIB1? The channel mapping of SIB1 ...

Home                 LTE                NB-IoT            5G(NR-NSA) Hi Guys, today we are learning about PDCCH , if you missed our previous article  please   click here . PDCCH Part-II What are Search Spaces? The PDCCH is used to send control information to a group of UEs as well as to a particular UE. This means that the PDCCH is used by the eNodeB to broadcast information to a group of UEs. So, in order to simplify the process of decoding the PDCCH, the CCEs are divided into two Search Spaces: Common Search Space : It consists of the CCEs which are used for sending the control information common for all the UEs. Maximum number of CCEs present in common search space can be 16. Common search space CCEs are used by eNodeB for transmitting SIBs which are common for all UEs.  UE-specific Search Space : CCEs ...

Home                 LTE                NB-IoT            5G(NR-NSA) Option 8/8a: In this option, the network will use the EPC core i.e. 4G Core. For radio access, both LTE and NR will be used. Control signaling will be routed through the NR RAN. This Option is not very likely, since an operator's LTE coverage is likely (at least initially) to be larger than their NR coverage. So there is no sense in routing signaling via the NR RAN.  The difference between Options 8 and 8a is based on whether the user plane data is sent to LTE directly or via the NR RAN.