4G LTE

RRC Connection Release procedure is used to release an RRC Connection. Here eNB initiates the RRC connection release procedure to the UE. Then…

Once the Random access procedure is completed, the next step is to RRC connection establishment procedure. This procedure will change the…

Once the UE reads PSS and SSS, the next step is to select a PLMN in the initial acquisition procedure. UE will first scan all the available…

T300: Start: Transmission of RRCConnectionRequest Stop: Reception of RRCConnectionSetup or RRCConnectionReject message, cell re-selection and…

In the previous 2 chapters we learn about MIB and different types of SIBs. In this chapter we shall learn more about SBI1 and SIB2. As these 2…

Once the PLMN is selected, the next step is to select a suitable cell inside that PLMN to camp on. Then after camping on, UE will frequently…

Signalling Radio Bearers (SRB) are used to transmit RRC and NAS messages. We know that there are total of 11 radio bearers. The first 3 types…

Introduction: Paging is used to network initiated connection setup. Typically, paging procedure should allow UE to sleep with no receiver…

In the last chapter we saw about MIB. In this chapter we shall learn about SIB. After initial cell synchronization and reading Master…

UE when it is switched on, it cannot directly establish a connection with eNB. It needs system information. This system information is divided…