gNB_out : (gNB, U::1)(GTP: TEID T)(A,Z)
GW-A_out: (GW-A, S1)(U::1, SGB::TEID, C1; SL=3)(A,Z)->U::1 is an
                                                      End.M.GTP6.D.Di
                                                      SID at SRGW-A
S1_out  : (GW-A, C1)(U::1, SGB::TEID, C1; SL=2)(A,Z)
C1_out  : (GW-A, SGB::TEID)(U::1, SGB::TEID, C1; SL=1)(A,Z)
GW-B_out: (GW-B, U::1)(GTP: TEID T)(A,Z)            ->SGB::TEID is an
                                                      End.M.GTP6.E
                                                      SID at SRGW-B
UPF_out : (A,Z)