In LTE network, PGW acts as default gateway for UE since PGW receives packets from external world and forwards this IP packets to UE by using GTP protocol. Here Tunnel acts as L2 layer.
Is it mandatory to establish a separate default bearer to exchange IMS signaling messages between UE and IMS network nodes ? Can't internet default bearer be used for the same ?
I want to know what are all signalling message exchange between LTE network nodes while establishing a dedicated bearer ?
