A method of operating a Session Management Function, SMF, node of a wireless communication network, the method comprising: receiving a request to create a session for a wireless device; obtaining subscription information for the wireless device responsive to receiving the request to create the session for the wireless device, wherein the subscription information for the wireless device includes NEF information associated with the wireless device; selecting a User Plane Function, UPF, node for the session for the wireless device responsive to receiving the request to create the session; transmitting a communication establishment request to a Network Exposure Function, NEF, node responsive to receiving the request to create the session for the wireless device, wherein the communication establishment request includes UPF node information for a tunnel between a UPF node and the NEF node to be used for the session for the wireless device, wherein transmitting the communication establishment request comprises transmitting the communication establishment request to the NEF node based on the NEF information associated with the wireless device; receiving a communication establishment response from the NEF node, wherein the communication establishment response includes NEF node information for the tunnel between the UPF node and the NEF node to be used for the session for the wireless device; and transmitting a tunnel information update to the UPF node after receiving the communication establishment response, wherein the tunnel information update includes the NEF node information for the tunnel between the UPF node and the NEF node, wherein the tunnel between the UPF node and the NEF node is a first tunnel, and wherein selecting the UPF node includes obtaining UPF node information for a second tunnel between the UPF node and a radio access node, RAN, associated with the wireless device, and wherein the second tunnel is to be used for the session for the wireless device, the method further comprising: transmitting a tunnel setup request to the RAN, wherein the tunnel setup request includes the UPF node information for the second tunnel between the UPF node and the RAN; and receiving a session establishment accept message from the RAN, wherein the session establishment accept message includes RAN information for the second tunnel between the UPF node and the RAN; wherein the tunnel information update includes the RAN information for the second tunnel and the NEF node information for the first tunnel so that that the RAN information for the second tunnel and the NEF node information for the first tunnel are transmitted in a single message. receiving a request to create a session for a wireless device; obtaining subscription information for the wireless device responsive to receiving the request to create the session for the wireless device, wherein the subscription information for the wireless device includes NEF information associated with the wireless device; selecting a User Plane Function, UPF, node for the session for the wireless device responsive to receiving the request to create the session; transmitting a communication establishment request to a Network Exposure Function, NEF, node responsive to receiving the request to create the session for the wireless device, wherein the communication establishment request includes UPF node information for a tunnel between a UPF node and the NEF node to be used for the session for the wireless device, wherein transmitting the communication establishment request comprises transmitting the communication establishment request to the NEF node based on the NEF information associated with the wireless device; receiving a communication establishment response from the NEF node, wherein the communication establishment response includes NEF node information for the tunnel between the UPF node and the NEF node to be used for the session for the wireless device; and transmitting a tunnel information update to the UPF node after receiving the communication establishment response, wherein the tunnel information update includes the NEF node information for the tunnel between the UPF node and the NEF node, wherein the tunnel between the UPF node and the NEF node is a first tunnel, and wherein selecting the UPF node includes obtaining UPF node information for a second tunnel between the UPF node and a radio access node, RAN, associated with the wireless device, and wherein the second tunnel is to be used for the session for the wireless device, the method further comprising: transmitting a tunnel setup request to the RAN, wherein the tunnel setup request includes the UPF node information for the second tunnel between the UPF node and the RAN; and receiving a session establishment accept message from the RAN, wherein the session establishment accept message includes RAN information for the second tunnel between the UPF node and the RAN; wherein the tunnel information update includes the RAN information for the second tunnel and the NEF node information for the first tunnel so that that the RAN information for the second tunnel and the NEF node information for the first tunnel are transmitted in a single message.