End marker handling for mobility between 5g and lte

A method comprising:

• receiving, at a source base station, a single end marker indication for a flow associated with a user equipment being handed over to a target base station;
• determining, by the source base station and in response to the received single end marker indication, at least one bearer mapped to the flow;
• generating for each determined bearer, at least one end of marker indication;
• and
• sending, over a forwarding path from the source base station to the target base station, the generated at least one end of marker indication.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus to at least:
• receive, at the apparatus, a single end marker indication for a flow associated with a user equipment being handed over to a target base station;
• determine, by the apparatus and in response to the received single end marker indication, at least one bearer mapped to the flow;
• generate for each determined bearer, at least one end of marker indication;
• and
• send, over a forwarding path from the apparatus to the target base station, the generated at least one end of marker indication.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus to at least:
• receive, at the apparatus, an end marker indication for a bearer associated with a flow to a user equipment being handed over to the apparatus;
• determine, by the apparatus and in response to the received end marker indication for the bearer, whether the apparatus needs to wait for at least one additional end marker associated with another bearer associated with the same flow;
• and
• wait, based on the determination, for the at least one additional end marker in order to determine that the flow has been switched.