A method of establishing a connection of a communication device to a communications network over a non-3GPP interworking function, N3IWF, entity the method comprising: receiving, from the communications network and at a user equipment, UE, device that has an existing packet data unit, PDU, session with the N3IWF provided by a first connection to the communications network, first address information as a result of setup of the first connection; establishing, at the UE device, a second connection with the communication device; receiving, at the UE device and from the communication device, a registration request indicating that the communication device requires a connection to the N3IWF entity; establishing a third connection of the communication device to the communications network via the first connection of the UE device to the communications network by forwarding, by the UE device to the N3IWF entity over the first connection using the first address information, the registration request to register the communication device via the N3IWF entity by the communications network, wherein the N3IWF entity determines second address information during the registration of the communication device and provides the second address information to the communications network; determining that the third connection of the communication device to the communications network is provided by the UE device in the communications network based on a relation of the second address information provided by the N3IWF and the first address information received by the UE device as a result of the setup of the first connection; and adapting a quality of service setting of the existing PDU session provided by the first connection of the UE device to the communications network to take into account a quality of service requirement for the third connection of the communication device to the communications network via the UE device by establishing a new PDU session with the N3IWF in parallel with the existing PDU session using a determination that the third connection of the communication device to the communications network is provided by the UE device. receiving, from the communications network and at a user equipment, UE, device that has an existing packet data unit, PDU, session with the N3IWF provided by a first connection to the communications network, first address information as a result of setup of the first connection; establishing, at the UE device, a second connection with the communication device; receiving, at the UE device and from the communication device, a registration request indicating that the communication device requires a connection to the N3IWF entity; establishing a third connection of the communication device to the communications network via the first connection of the UE device to the communications network by forwarding, by the UE device to the N3IWF entity over the first connection using the first address information, the registration request to register the communication device via the N3IWF entity by the communications network, wherein the N3IWF entity determines second address information during the registration of the communication device and provides the second address information to the communications network; determining that the third connection of the communication device to the communications network is provided by the UE device in the communications network based on a relation of the second address information provided by the N3IWF and the first address information received by the UE device as a result of the setup of the first connection; and adapting a quality of service setting of the existing PDU session provided by the first connection of the UE device to the communications network to take into account a quality of service requirement for the third connection of the communication device to the communications network via the UE device by establishing a new PDU session with the N3IWF in parallel with the existing PDU session using a determination that the third connection of the communication device to the communications network is provided by the UE device.