P-TMSI in 2G/3G network
P-TMSI stands for "Packet - Temporary Mobile Subscriber Identity".
It is a temporary identifier that the SGSN assigns to the UE during the attach procedure.
The P-TMSI is used in order to enhance the security of the UE, as the UE stores this P-TMSI locally, and uses it, instead of its IMSI, to identify itself to the network in all subsequent communications with the network.
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Your Guide for LTE Attach procedure
After the LTE Attach Procedure ends, the following should be accomplished, LTE Attach Signaling
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(MS-SGSN-GGSN) GPRS Interfaces in 3G network
Here, we illustrate the GPRS interfaces between the MS, the SGSN, and the GGSN in 3G network in both 'control plane', and 'data plane'. The 'control plane' is where the signaling messages are passing. While the 'data plane' is where user data is passing. User Plane interfacesin 3G Below diagram shows the interfaces exist between…
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Your reference for GPRS Attach Procedure
GPRS Attach procedure is the procedure in which the MS registers to the network. In other words, the network knows about the existence of the MS. After completing the process of GPRS attach, this means the following, An 'MM context' will exist on the MS, and the SGSN. This 'MM context' stores the information of…
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