Various communication systems may benefit from an identifier that can correlate a user equipment or a packet data network connection with a particular cell. For example, a correlation identifier may be useful to address management of user plane congestion and other use cases. A method can include generating a correlation identifier for a user equipment and/or a packet data network connection. The method also includes the ability to identify the user context information with the same correlation ID in the core network and in the radio access network. The method can also include sending the correlation identifier to a network element.