Section: 7.3.14 Change Notification Request
Content: 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [3] and 3GPP TS 23.060[ General Packet Radio Service (GPRS); Service description; Stage 2 ]  [4] specify that if PGW has requested ECGI/eNodeB ID/TAI/CGI/SAI/RAI Change Reporting or reporting of change of UE presence in Presence Reporting Area(s) or User CSG information Change Reporting and if MME/S4-SGSN supports the feature, then MME/S4-SGSN shall send the Change Notification Request message on the S11/S4 interface to the SGW. If SGW supports the feature, the SGW forwards the message on the GTP based S5/S8 interface to the PGW as part of location dependent charging related procedures. In this version of the specification, the sender shall set the header TEID value to that of the peer node's Control Plane TEID on S11/S4 interface or to the peer node's Control Plane TEID on S5/S8 interface. However a receiver shall be prepared to receive messages in which the header TEID value is set to zero from implementation conforming to earlier versions of this specification. When that is the case, the receiver identifies the subscriber context based on the included LBI, IMSI, and/or MEI IEs. The MME shall increment the "MO Exception Data Counter" by one each time the MME has received the RRC cause "MO Exception data". The MME may defer sending a Change Notification Request message to report a non-zero value for the "MO Exception Data Counter" based on local configuration. If the PLMN has configured secondary RAT usage reporting and if PDN GW Secondary RAT reporting is active, the MME shall send the Change Notification Request message and include "Secondary RAT Usage Data Report" on the S11 interface to the SGW when it has received Secondary RAT usage data from the eNodeB in the following procedures, regardless of whether ULI shall be reported or not: Connection Suspend eNodeB initiated S1 release E-UTRAN to UTRAN Iu mode Inter RAT handover E-UTRAN to GERAN A/Gb mode Inter RAT handover MME triggered Serving GW relocation MME to 3G SGSN combined hard handover and SRNS relocation The MME may also send the send the Change Notification Request message and include "Secondary RAT Usage Data Report" on the S11 interface to the SGW when it has received periodic reporting of Secondary RAT usage data from eNodeB or as part of an MME initiated S1 release from the eNodeB, as described in 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [3] clause 5.7A. The SGW shall forward the "Secondary RAT Usage Data Report" to the PGW if the IRPGW flag is set to "1". Table -1: Information Element in Change Notification Request