Managing overload in at least one core network

A shared Radio Network Node (RNN) for managing overload in at least one core network, wherein the shared RNN is configured to serve a wireless device, wherein the wireless device and the shared RNN are configured to operate in a wireless communications network connected to the at least one core network, and wherein the shared RNN comprises a processor and a memory, which memory contains instructions executable by the processor, whereby the shared RNN is operative to:

• receive a connection request from the wireless device, wherein the connection request comprises a code that maps to:
• one of a plurality of PLMN IDs served by the shared RNN, and
• one of a plurality of logical partitions of a core network node connected to the shared RNN;
• and
• when the logical partition of the core network node to which the code maps is associated with an overload action:
• transmitting a rejection message in response to the connection request, or
• indicating a redirection target in response to the connection request.

A method performed by a wireless device for assisting a shared Radio Network Node (RNN) in managing overload in at least one core network, wherein the wireless device is configured to be served by the shared RNN, wherein the wireless device and the shared RNN are configured to operate in a wireless communications network connected to the at least one core network, and wherein the method comprises:

• transmitting a connection request to the shared RNN, wherein the connection request comprises a code that maps to:
• one of a plurality of PLMN IDs served by the shared RNN, and
• one of a plurality of logical partitions of a core network node connected to the shared RNN;
• and
• when the logical partition of the core network node to which the code maps is associated with an overload action:
• receiving a rejection message from the shared RNN, or
• receiving an indication of a redirection target from the shared RNN,
• whereby the wireless device assists the shared RNN in managing overload in the at least one core network.

A wireless device for assisting a shared Radio Network Node (RNN) in managing overload in at least one core network, wherein the wireless device is configured to be served by the shared RNN, wherein the wireless device and the shared RNN are configured to operate in a wireless communications network connected to the at least one core network, and

• wherein the wireless device comprises a processor and a memory, which memory contains instructions executable by the processor, whereby the wireless device is operative to:
• transmit a connection request to the shared RNN, wherein the connection request comprises a code that maps to:
• one of a plurality of PLMN IDs served by the shared RNN, and
• one of a plurality of logical partitions of a core network node connected to the shared RNN
• when the logical partition of the core network node to which the code maps is associated with an overload action:
• receive a rejection message from the shared RNN, or
• receive an indication of a redirection target from the shared RNN,
• whereby the wireless device assists the shared RNN in managing overload in the at least one core network.