1. An apparatus comprising:a transceiver that communicates with one or more network functions in a mobile communication network; and
a processor that:
receives a first session management request via an access management function, the first session management request containing: a second session management request sent by a remote unit, a first indication that the remote unit requests a single-access data connection and a second indication that the remote unit allows the network to upgrade the data connection;
determines whether to establish a multi-access data connection for the remote unit based on the second indication in the first session management request, wherein the multi-access data connection is associated with a first access network and a second access network; and
sends a request to the access management function to establish a data path for each access network with which the remote unit is registered in response to determining to establish the multi-access data connection, wherein each data path is anchored at a common user plane network function in the mobile communication network.