4. The H-GMLC sends an update message (for example, Nudm_UECM_update) to the UDM, where the update message carries the location privacy setting data reported by the UE. Correspondingly, the UDM receives the update message from the H-GMLC. The UDM updates and saves the location privacy setting data reported by the UE, and sends an update message (for example, Nudm_UECM_update) to the H-GMLC, where the update message is used to indicate that the UDM has been updated. Correspondingly, the H-GMLC receives the update message from the UDM.
5. The H-GMLC sends an update message (for example, Nudm_UECM_update) to the V-GMLC, where the update message is used to indicate that the UDM has been updated. Correspondingly, the V-GMLC receives the update message from the H-GMLC.
6. The V-GMLC sends an update message (for example, Nudm_UECM_update) to the AMF or the LMF, where the update message is used to indicate that the UDM has been updated. Correspondingly, the AMF or the LMF receives the update message from the V-GMLC.
7. The AMF or the LMF sends a location privacy setting data update response (for example, a privacy setting update response) to the UE, where the location privacy setting data update response is used to respond to the location privacy setting data update request, and is used to indicate that the UDM has updated the location privacy setting data reported by the UE. Correspondingly, the UE receives the location privacy setting data update response from the AMF or the LMF.