Mobile network user plane with access network user plane function

1. An access network user plane function (ANUP) for a mobile network, the ANUP comprising processing circuitry and configured to:

execute an access network protocol to implement a connection with a user equipment (UE);

implement, based on session data received from a control plane function of a mobile core network for the mobile network, an interface with a data network;

implement, with the mobile core network, a common interface that provides a combination of an N2 interface and an N4 interface; and

route or switch packets between the connection with the UE and the interface with the data network.

2. The ANUP of claim 1 , wherein the ANUP does not implement an N3 interface.

3. The ANUP of claim 1 , wherein the control plane function comprises one of an Access Mobility Management Function (AMF) or a Session Management Function (SMF).

4. The ANUP of claim 1 , wherein the access network protocol comprises one of Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), and Service Data Adaption Protocol (SDAP).

5. The ANUP of claim 1 ,

wherein the access network protocol is for an access network protocol layer that supports a protocol data unit (PDU) layer between the connected UE and the ANUP, and

wherein to route or switch packets between the connection with the UE and the interface with the data network, the ANUP is configured to route IP packets, switch Ethernet frames, or relay unstructured PDU data.

6. The ANUP of claim 1 , wherein a single server includes the processing circuitry.

7. The ANUP of claim 1 , wherein the ANUP is configured to advertise to the data network a host route comprising an Internet Protocol address for a connected UE.

8. The ANUP of claim 7 , wherein the data network is implemented as an Internet Protocol Virtual Private Network (IP-VPN) or an Ethernet VPN, wherein the ANUP is configured as a customer edge (CE) device connected to a provider edge (PE) device or integrated into the PE device of the IP-VPN or Ethernet VPN.

9. The ANUP of claim 8 , wherein the ANUP is configured to use Segment Routing to implement tunneling for the IP-VPN or Ethernet VPN.

10. The ANUP of claim 1 , wherein the ANUP is configured to implement a pseudowire across a transport network to transport packet data traffic for cases using a separate access network function and user plane function.

11. The ANUP of claim 10 , wherein the ANUP is configured to implement a pseudowire across a transport network between a Visited Public Land Mobile Network (VPLMN) and a Home Public Land Mobile Network (HPLMN) to transport, to the HPLMN, packet data traffic received from a UE connected to the VPLMN.

12. The ANUP of claim 10 , wherein the ANUP is configured to implement a pseudowire across a transport network to transport packet data traffic to a network of a Mobile Virtual Network Operator.

13. The ANUP of claim 10 , wherein the ANUP is configured to implement a pseudowire across a transport network to transport packet data traffic to a UPF that serves multiple access networks.

14. A mobile network system comprising:

a mobile core network comprising a control plane function; and

an access network user plane function (ANUP) for a mobile network, the ANUP configured to:

execute an access network protocol to implement a connection with a user equipment;

implement, based on session data received from the control plane function of the mobile core network, an interface with a data network;

implement, with the mobile core network, a common interface that provides a combination of an N2 interface and an N4 interface; and

route or switch packets between the connection with the UE and the interface with the data network.

15. A method comprising:

executing, by an access network user plane function (ANUP) for a mobile network, an access network protocol to implement a connection with a user equipment (UE);

implementing, by the ANUP, based on session data received from a control plane function of a mobile core network for the mobile network, an interface with a data network;

implementing, with the mobile core network, a common interface that provides a combination of an N2 interface and an N4 interface; and

routing or switching, by the ANUP, packets between the connection with the UE and the interface with the data network.

16. The method of claim 15 , wherein the ANUP does not implement an N3 interface.

17. The method of claim 15 , wherein the access network protocol is for an access network protocol layer that supports a protocol data unit (PDU) layer between the connected UE and the ANUP, and

wherein to route or switch packets between the connection with the UE and the interface with the data network, the ANUP is configured to route IP packets, switch Ethernet frames, or relay unstructured PDU data.

18. The method of claim 15 , wherein the ANUP is a first ANUP, the method further comprising:

in response to a UE newly connecting to the first ANUP and disconnecting from a second ANUP:

advertising, by the first ANUP to the data network, a first host route for the UE via the first ANUP;

withdrawing, by the second ANUP from the data network, a second host route for the UE via the second ANUP; and

using, by nodes in the data network, the first host route to direct traffic for the UE to the first ANUP and not the second route.

19. The method of claim 15 , wherein the data network is implemented as an Internet Protocol Virtual Private Network (IP-VPN) or an Ethernet VPN, wherein the ANUP is configured as a customer edge (CE) device connected to a provider edge (PE) device or integrated into a PE device of the IP-VPN or Ethernet VPN.

20. The method of claim 19 , further comprising:

using, by the ANUP, Segment Routing to implement tunneling for the IP-VPN or the Ethernet VPN.