UP CP | CGN Address Allocation | | Request | 1.1|-------- via Ci--------->| | CGN Address Allocation | | Response | 1.2|<------- via Ci----------| | | | CGN Address Renew | | Request | 2.1|-------- via Ci--------->| | CGN Address Renew | | Response | 2.2|<------- via Ci----------| | | | CGN Address Release | | Request | 3.1|-------- via Ci--------->| | CGN Address Release | | Response | 3.3|<------- via Ci----------| | |