Method And Apparatuses For Attaching A Radio Base Station To A Core Network Node

A method for attaching a first radio base station to a core network via a radio access network, wherein a forwarding of data within the radio access network is being controlled by a Software Defined Network (SDN) Controller, wherein the radio access network comprises a plurality of further radio base stations being capable of providing radio connection to a plurality of user equipment (UE) and being under the control of the SDN Controller, the method comprising:

• selecting at least one UE from the plurality of UEs, wherein the selected at least one UE is located within an overlapping radio connectivity area of the first radio base station and one of the further radio base stations, denoted as a second radio base station;
• activating, by the SDN Controller, control of the SDN Controller onto the at least one selected UE;
• connecting, by the SDN Controller, the first radio base station to the second radio base station via the radio connections of the at least one selected UE;
• enabling, by the SDN Controller, forwarding of data between the first radio base station and the core network via the second radio base station.

A Software Defined Network (SDN) Controller for controlling a forwarding of data within a radio access network, wherein the SDN Controller is adapted to control a first radio base station of the radio access network and a plurality of further radio base stations of the radio access network, wherein the first and the plurality of further radio base stations are capable of providing radio connection to a plurality of user equipment (UE), the SDN Controller comprising:

• processing circuitry;
• memory containing instructions executable by the processing circuitry whereby the SDN controller is operative to:
• receive a list of at least one selected UE from one of the plurality of further radio base stations, denoted as a second radio base station;
• activate control of the SDN Controller onto the at least one selected UE;
• connect the first radio base station to the second radio base station via the radio connections of the at least one selected UE;
• and
• enable the forwarding of data between the first radio base station and the core network via the second radio base station.

A radio base station in a radio access network, wherein the radio access network comprises a further radio base station, wherein forwarding of data within the radio access network is controlled by a Software Defined Network (SDN) Controller;

• wherein the radio base station and the further radio base station are capable of providing radio connection to a plurality of user equipment (UE) and are under the control of the SDN Controller, the radio base station comprising:
• processing circuitry;
• memory containing instructions executable by the processing circuitry whereby the radio base station is operative to:
• select at least one UE from the plurality of UEs, wherein the selected at least one UE is located within an overlapping radio connectivity area of the radio base station and the further radio base station;
• and
• indicate an identity of the at least one selected UE to the SDN Controller for activating control of the SDN Controller onto the at least one selected UE.