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UE in 5G network will have many identifiers to identify itself uniquely over the network. Below are some of them. In the next series of post, we shall discuss more on other identifiers. Brief of Identities present in 5G 1. SUPI – …
5G AKA procedure is required for UE to access the Network Services. UE needs to be authenticated before it is connected to the network. In 5G NR, IMSI has been replaced with SUCI (Subscription Permanent Identifier). In LTE there were few instances where IMSI was sent …
Below image is taken from TS 38.300 Legend: USIM: Universal Subscriber Identity Module ME: Mobile Equipment SEAF: SEcurity Anchor Function AUSF: AUthentication Function ARPF: Authentication credential Repository and Processing Function,it keeps the authentication credentials. k: Key CK: …
Msg3 and Msg4 are used for contention resolution. The uplink time synchronization are completed in Msg1 and Msg2. The purpose of Msg3 and Msg4 is to identify the C-RNTI for the subsequent data transmission. During CBRA, there are chances that multiple UE may use the same …
