4g LTE: LTE UE PLMN selection
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…
4g LTE: RRC Timers in LTE
T300: Start: Transmission of RRCConnectionRequest Stop: Reception of RRCConnectionSetup or RRCConnectionReject message, cell re-selection and…
4g LTE: LTE SBI1 and SIB2
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…
4g LTE: Cell Search Procedure and Cell Selection Procedure in LTE
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…
4g LTE: LTE Signalling Radio Bearers Mapping
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…
4g LTE: LTE Paging
Introduction: Paging is used to network initiated connection setup. Typically, paging procedure should allow UE to sleep with no receiver…
4g LTE: LTE SIB: System Information Block
In the last chapter we saw about MIB. In this chapter we shall learn about SIB. After initial cell synchronization and reading Master…
4g LTE: LTE MIB: Master Information Block
UE when it is switched on, it cannot directly establish a connection with eNB. It needs system information. This system information is divided…
4g LTE: RRC Layer In depth
States in RRC There are 2 states in RRC layer. 1. RRC_CONNECTED 2. RRC_IDLE A UE is in RRC_CONNECTED when an RRC connection has been…