Wireless data service based on geographic data network names

1. A method of operating a wireless communication network to serve a User Equipment (UE) based on a Data Network Name (DNN), the method comprising:

an Access and Mobility Management Function (AMF) receiving initial signaling for the UE and selecting a current Session Management Function (SMF) to serve the UE for the DNN responsive to the initial signaling;

the current SMF serving the UE for the DNN;

the AMF detecting when the UE enters a geographic area while using the DNN;

the current SMF transferring a wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN;

the AMF receiving new signaling for the UE responsive to the wireless reattach instruction and selecting a new SMF to serve the UE for the DNN responsive to the new signaling; and

the new SMF serving the UE for the DNN.

2. The method of claim 1 further comprising:

the current SMF selecting a current User Plane Function (UPF) for the UE and the DNN and controlling the current UPF;

the current UPF exchanging user data for the UE and the DNN responsive to the control from the current SMF;

the new SMF selecting a new UPF for the UE and the DNN and controlling the new UPF; and

the new UPF exchanging additional user data for the UE and the DNN responsive to the control from the new SMF.

3. The method of claim 1 wherein the AMF detecting when the UE enters the geographic area while using the DNN comprises receiving a Tracking Area Update (TAU) from the UE that indicates a Tracking Area (TA) for the UE.

4. The method of claim 1 wherein the AMF detecting when the UE enters the geographic area while using the DNN and the current SMF transferring the wireless reattach instruction comprises:

the AMF notifying a Policy Control Function (PCF) responsive to the detection of the UE entering the geographic area while using the DNN;

the PCF directing the current SMF to transfer the wireless reattach instruction for the DNN to the UE responsive to the notification from the AMF; and

the current SMF transferring the wireless reattach instruction for the DNN to the UE in response to the direction from the PCF.

5. The method of claim 1 wherein the AMF detecting when the UE enters the geographic area while using the DNN and the current SMF transferring the wireless reattach instruction comprises:

the AMF detecting when the UE enters the geographic area while using the DNN in non-active mode; and

the current SMF transferring the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the non-active mode.

6. The method of claim 1 wherein the AMF detecting when the UE enters the geographic area while using the DNN and the current SMF transferring the wireless reattach instruction comprises:

the AMF detecting when the UE enters the geographic area while using the DNN in non-emergency mode; and

the current SMF transferring the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the non-emergency mode.

7. The method of claim 1 wherein the AMF detecting when the UE enters the geographic area while using the DNN and the current SMF transferring the wireless reattach instruction comprises:

the AMF detecting when the UE enters the geographic area while using the DNN in idle mode; and

the current SMF transferring the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the idle mode.

8. The method of claim 1 wherein the AMF detecting when the UE enters the geographic area while using the DNN and the current SMF transferring the wireless reattach instruction comprises:

the AMF detecting when the UE enters the geographic area while using the DNN in a non-active, non-emergency, idle mode; and

the current SMF transferring the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the non-active, non-emergency, idle mode.

9. The method of claim 1 wherein the AMF detecting when the UE enters the geographic area while using the DNN and the current SMF transferring the wireless reattach instruction comprises:

the AMF detecting when the UE enters the geographic area while using the DNN in Session/Service Continuity (SSC) mode 1; and

the current SMF transferring the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the SSC mode 1.

10. The method of claim 1 wherein the AMF detecting when the UE enters the geographic area while using the DNN and the current SMF transferring the wireless reattach instruction comprises:

the AMF detecting when the UE enters the geographic area while using the DNN in Session/Service Continuity (SSC) mode 2; and

the current SMF transferring the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the SSC mode 2.

11. A wireless communication network to serve a User Equipment (UE) based on a Data Network Name (DNN), the wireless communication network comprising:

an Access and Mobility Management Function (AMF) configured to receive initial signaling for the UE and select a current Session Management Function (SMF) to serve the UE for the DNN responsive to the initial signaling;

the current SMF configured to serve the UE for the DNN;

the AMF configured to detect when the UE enters a geographic area while using the DNN;

the current SMF configured to transfer a wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN;

the AMF configured to receive new signaling for the UE responsive to the wireless reattach instruction and select a new SMF to serve the UE for the DNN responsive to the new signaling; and

the new SMF configured to serve the UE for the DNN.

12. The wireless communication network of claim 11 further comprising:

the current SMF configured to select a current User Plane Function (UPF) for the UE and the DNN and control the current UPF;

the current UPF configured to exchange user data for the UE and the DNN responsive to the control from the current SMF;

the new SMF configured to select a new UPF for the UE and the DNN and control the new UPF; and

the new UPF configured to exchange additional user data for the UE and the DNN responsive to the control from the new SMF.

13. The wireless communication network of claim 11 wherein the AMF is configured to receive a Tracking Area Update (TAU) from the UE that indicates a Tracking Area (TA) for the UE to detect when the UE enters the geographic area while using the DNN.

14. The wireless communication network of claim 11 wherein:

the AMF is configured to notify a Policy Control Function (PCF) responsive to the detection of the UE entering the geographic area while using the DNN;

the PCF is configured to direct the current SMF to transfer the wireless reattach instruction for the DNN to the UE responsive to the notification from the AMF; and

the current SMF is configured to transfer the wireless reattach instruction for the DNN to the UE in response to the direction from the PCF.

15. The wireless communication network of claim 11 wherein:

the AMF is configured to detect when the UE enters the geographic area while using the DNN in non-active mode; and

the current SMF is configured to transfer the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the non-active mode.

16. The wireless communication network of claim 11 wherein:

the AMF is configured to detect when the UE enters the geographic area while using the DNN in non-emergency mode; and

the current SMF is configured to transfer the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the non-emergency mode.

17. The wireless communication network of claim 11 wherein:

the AMF is configured to detect when the UE enters the geographic area while using the DNN in idle mode; and

the current SMF is configured to transfer the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the idle mode.

18. The wireless communication network of claim 11 wherein:

the AMF is configured to detect when the UE enters the geographic area while using the DNN in a non-active, non-emergency, idle mode; and

the current SMF is configured to transfer the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the non-active, non-emergency, idle mode.

19. The wireless communication network of claim 11 wherein:

the AMF is configured to detect when the UE enters the geographic area while using the DNN in Session/Service Continuity (SSC) mode 1; and

the current SMF is configured to transfer the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the SSC mode 1.

20. The wireless communication network of claim 11 wherein:

the AMF is configured to detect when the UE enters the geographic area while using the DNN in Session/Service Continuity (SSC) mode 2; and

the current SMF is configured to transfer the wireless reattach instruction for the DNN to the UE responsive to the detection of the UE entering the geographic area while using the DNN in the SSC mode 2.