forwarding sgw 118 allocates sgw f teid for data forwarding it can embed such plmn information of the pgw into the sgw f teid it is also possible to provide the plmn id of the pgw 120 serving the ue 128 to the rnc 106 or enb 114 during rab assignment procedure and srns relocation procedure for 3g or initial ue context setup e rab establishment procedure and handover procedure for 4g by the sgsn 108 or mme 116 the procedure for rab assignment procedure for 3g is described in the section 12 7 4 1 of ts 23 060 rab assignment procedure using gn gp and in the section 8 2 2 of ts 25 413 and illustrated in fig5 in the rab assignment request message a new ie preferably called u201c plmn of pgw ggsn u201d is included and associated with each rab addition of the new plmn of pgw ggsn ie in the rab assignment request message is shown in table 1 fig6 illustrate a core network node cn transmitting a message of type rab assignment request to an rnc 106 the rab assignment request message includes the plmn id of the pgw serving the ue that.