Category: Telecom

  System Information Block Type 3 or with shortened version SIB3 contains common information for Intra-Frequency, Inter-Frequency and Inter-Technology cell re-selection parameters. But these parameter values are not applied in all re-selection scenarios. SIB3 is transmitted from the network to READ MORE

  After initial synchronization of UE with the network and obtaining the MIB, the UE starts to listen System Information Block Type 1 (SIB1) which is carrying cell access related information. SIB1 is transmitted through BCCH -> DL-SCH -> PDSCH READ MORE

  “Block Error Rate” or BLER is a measurement type of quality in telecommunication. Simple calculation of the measurement: BLER (in LTE) = Number of erroneous blocks / total number of received blocks The calculation is based on CRC (Cyclic READ MORE

  After initial synchronization of UE with the network, it starts to receive information blocks where the first and most essential one is Master Information Block. It carries less, but important information to UE from the network. MIB (Master Information READ MORE

There are another key factors in LTE which similar items are known from legacy networks. System Information Blocks and Master Information Block. These information messages are sent by the network to UE to keep it updated about cell selection, cell READ MORE

During handover procedure over X2 interface, an identifier is used to exchange control messages between source and target eNodeB. This identifier is known as “UE X2AP ID” and used to distinguish control messages for the UE which is handing over READ MORE

Let’s imagine, how many simultaneous users can be connected to an eNodeB, of course it can be 100-150 users even more. But there is only one S1 interface between eNodeB and MME which is known as S1-MME interface. This interface READ MORE

When the UE attaches to LTE network, an IP address is allocated to the UE by PGW to make easy data connectivity between the UE and Packet Data Network. More than one PGW might be exist in the network, and READ MORE

Globally Unique Temporary Identifier or with shortened version GUTI is allocated to a UE by the MME when the UE attaches to the Network. And it is used instead of the IMSI to identify the UE. When the UE attaches READ MORE