For 4G, the PANI (P-Access-Network-Info) header, contains the TAC and ECGI in the following format: MCC + MNC + TAC_in_hex + ECI_in_hex, and, correct me if I am wrong, TAC_in_hex is padded with zeros to the left to 4 hexadecimal digits, and ECI_in_hex to 7 digits.
What is the format for 5G PANI? Will the TAC be included?
Given that gNodeb is variable in length, is there a way to split the NCI in gNodeb and Ci from the PANI header?
Finally, how is it possible to distinguish between a 5G and 4G PANI header? For example, 4G includes “utran-cell-id-3gpp” as access network info in PANI. Does 5G include recognizable strings like this?
5G-GUTI (5G Global Unique Temporary Identifier): This is a temporary identifier assigned to the UE by the network.
5G-TMSI (5G Temporary Mobile Subscriber Identity): This is a temporary identifier assigned to the UE by the 5G core network
5G-TA (5G Timing Advance): This is the timing advance value used by the UE for the session.
By including this information in the P-Access-Network-Info header, the network and other entities in the session can make better decisions about how to handle the session and optimize the user experience.