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S6b interfaceBetween the 3GPP AAA Server/Proxy and the PDN GW3GPP TS 23402 S6d interfaceBetween SGSN and HSS, Subscription and Authentication Data3GPP TS 29.272 S7c interfaceTransfer of (QoS) policy information from PCRF to the S-GW.3GPP TS 32820, TS 23402 ...
UE can connect to multiple PDN at a time. If UE is connected multiple PDN, it mean UE have multiple IP(One IP correspond to one PDN). UE is required multiple PDN connectivity when existing PDN is not able to fulfill UE requirement. ...