Apparatus, method, and computer program

An apparatus comprising

• at least one processor, and
• at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:
• receiving an indication that a user equipment will be or has been handed over from a first access network node to a second access network node, the first access network node being configured to provide a first congestion control mechanism;
• receiving an indication that the second access network node does not support the first congestion control mechanism;
• determining that a user plane function is able to perform a second congestion control mechanism;
• and
• signalling the user plane function a request to perform the second congestion control mechanism for at least one packet signalled between the user equipment and the second access network node.

An apparatus comprising

• at least one processor, and
• at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:
• determining that a user equipment will be or has been handed over from a first access network node to the apparatus;
• determining that the apparatus does not support a first congestion control mechanism that is performed by the first access network node;
• signalling to a core network node an indication that the apparatus does not support the first congestion control mechanism;
• and
• receiving, from the core network node, an instruction to provide congestion information to a user plane function for at least one packet signalled between the user equipment and the apparatus.

An apparatus comprising

• at least one processor, and
• at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:
• determining that a user equipment will be or has been handed over from a first cell provided by a first access network node to a second cell provided by a second access network node;
• and
• providing, to the second access network node, an indication that the first access network node supports a first congestion control mechanism that is provided by the first access network node.