From the course: NB-IoT (Narrowband IoT) Engineering: Deployment, Configuration, Call Flow Analysis

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System information block-1 (SIB1-NB)

System information block-1 (SIB1-NB)

From the course: NB-IoT (Narrowband IoT) Engineering: Deployment, Configuration, Call Flow Analysis

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System information block-1 (SIB1-NB)

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Now that we have seen how the device decodes the MIB message, which is Master Information Block, let's move to the next layer of system information, which is System Information Block Type 1, SIB1. This message gives the device a detailed picture of the network identity, access rules, and configuration. Starting with the PLMN identity, which is the Public Land Mobile Network Identity. This has information about the network. There is one entry which specifies the MCC, which is Mobile Country Code, and MNC, which is Mobile Network Code. This tells the device exactly which operator's network it is communicating with. It's a crucial check to ensure it is connected to the right network. Next is a tracking area code. It could have certain value. In this case, we have the value of 2511. This tracking area code defines a group of cells within the network. When the device moves between areas with different DAC, it must update the network with a new location registration. This mechanism keeps…

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