4.2 Location Cancellation

23.0123GPPLocation management proceduresRelease 17TS

4.2.1 Detailed procedure in the VLR

4.2.1.1 Process Cancel_Location_VLR

The procedure Check_Parameters is specified in 3GPP TS 23.018 [5a].

Sheet 1: If supported by the VLR, the "Subscriber data dormant" flag shall be set to true to allow triggering Mobile Terminating Roaming Retry. A VLR not supporting this flag shall behave as if the flag is set to false.

Sheet 1: A VLR not supporting the Mobile Terminating Roaming Retry feature and the Mobile Terminating Roaming Forwarding fearture (see 3GPP TS 23.018 [5a]) may not send Cancel Location to MSC.

Sheet 1: A VLR supporting the Mobile Terminating Roaming Retry feature sets the "Cancel Location received" flag to true when receiving the Cancel Location message from the HLR. This is used to determine whether to trigger MT roaming retry upon receipt of an incoming call, see clause 7.3.2.1 of 3GPP TS 23.018 [5a].

Sheet 1: A VLR supporting the Mobile Terminating Roaming Forwarding feature may include the MTRF Supported And Authorized flag or the MTRF Supported And Not Authorized flag in the Cancel Location message it sends to the MSC if received in the Cancel Location message from the HLR.

Figure 4.2.1.1 (Sheet 1 of 2): Process Cancel_Location_VLR

Figure 4.2.1.1 (Sheet 2 of 2): Process Cancel_Location_VLR

4.2.2 Detailed procedure in the HLR

4.2.2.1 Process Cancel_Location_HLR

Figure 4.2.2.1: Process Cancel_Location_HLR