Radio base station, edge server, and methods therein

A radio access network node arranged in a radio access network, the radio access network node comprising:

• a communication module configured to communicate with an edge server that provides at least one of computing resources and storage resources for edge computing regarding a service or application directed to a radio terminal connected to the radio access network, wherein
• the communication module is configured to:
• receive from a core network node a first identifier that is used by the service, the application, or the edge server to identify the radio terminal;
• associate the first identifier with a second identifier that is used by the radio access network node to identify the radio terminal;
• communicate with the edge server using the first identifier;
• and
• in response to receiving from the edge server a predetermined message containing the first identifier, transmit to the edge server a third identifier to identify a radio bearer or a logical channel configured for the radio terminal.