What is difference between MIB and SIB in LTE?
What is difference between MIB and SIB in LTE?
Static part is called as MIB and is transmitted using BCH and carried by PBCH once every 40ms. Dynamic part is called as SIB and is mapped on RRC SI messages(SI-1,2,3,4,5,6,7,8,9,10,11) over DL-SCH and transmitted using PDSCH at periodic intervals. SI-1 transmitted every 80ms, SI-2 every 160ms and SI-3 every 320 ms.
Which SIBs are essential in LTE?
In LTE, MIB, SIB1, SIB2 is mandated to be transmitted for any cells. Since many of the SIB are transmitted, it should be transmitted in such a way that the location (subframe) where a SIB is transmitted should not be the same subframe where another SIB is transmitted.
What is MIB 5G?
Cell search is the procedure for a UE to acquire time and frequency synchronization with a cell and to detect Physical layer Cell ID (PCI) of the cell. The UE needs to first decode PBCH/MIB in order for it to receive other system information transmitted on PDSCH. …
Why does MIB need Phich?
PHICH is a control channel on LTE downlink, that is used to indicate the reception of PUSCH transmission from a mobile/UE. The number of PHICH groups is a cell level parameter and it is also transmitted as part of MIB, so as to assist the UE in getting the control channel mapping.
Why does SIB come in Pdsch?
It contains information about the cell bandwidth, some information about PHICH (Physical HARQ Indicator Channel) and the SFN. The SIB’s as I mentioned are transmitted on DL-SCH mapped on PDSCH. To receive information about SIB’s the UE needs information about PHICH which is read from the MIB.
What is the full form of LTE Ecgi and ECI?
The formula/equations used in LTE ECGI and ECI calculation are also mentioned. The full form of ECI is E-UTRAN Cell Identifier. ECI is used to identify cell within PLMN. The full form of ECGI is E-UTRAN Cell Global Identifier.
What is the Ecgi code of a cell phone?
The CGI (2G and 3G) and eCGI (of 4G) is always a 15 decimal digit code For 2G 3G and 4g networks the five first digits are the MCC (Mobile Country Code) and the MNC (Mobile Network Code) For 2G and 3G networs the next 5 digits are the LAC (Location Area Code) and the last five the Cell ID within the LAC
How many sibs are there in LTE?
As the functionalities of LTE evolves and start interplay with other radio technologies (e.g, wlan, V2X, NR etc), the list of SIB is getting longer and longer. We first started with around 12 SIBs and now (as of Jan 2020. Release 15), the largest SIB Type number is SIB24.
How to calculate 3g/4g/lac/Ecgi?
From the 3GPP specs, it’s defined as follows: 3G: CGI = PLMN-ID + LA code + CID 4G: ECGI = PLMN-ID + ECI I can already get the LAC (location area code) and CID (Cell ID) from the system.
