Radio network nodes, wireless device, and methods performed therein for handling connections in a wireless communication network

A method, performed by a first radio network node, for handling connections of a wireless device in a wireless communication network, wherein the first radio network node is a master radio network node in a dual connectivity setup to the wireless device, wherein the dual connectivity setup provides a split signaling radio bearer to the wireless device from the first radio network node and from a second radio network node, wherein the second radio network node is a secondary radio network node, the method comprising:

• receiving a failure report from the wireless device via the second radio network node, the failure report indicating a radio link problem between the first radio network node and the wireless device;
• performing an evaluation of the failure report for initiating a handover process of the wireless device;
• updating the second radio network node with a new security key;
• and
• in response to receiving the failure report, sending the new security key to the wireless device via the second radio network node.

A wireless device for handling connections in a wireless communication network, wherein the wireless device is configured with a split signaling radio bearer to a first radio network node and a second radio network node, wherein the first radio network node is a master radio network node and the second radio network node is a secondary radio network node, the wireless device comprising:

• processing circuitry;
• memory containing instructions executable by the processing circuitry whereby the wireless device is operative to:
• detect a radio link problem to the first radio network node;
• transmit a failure report to the first radio network node over the split signaling radio bearer via the second radio network node, the failure report indicating the radio link problem to the first radio network node;
• and
• after transmit the failure report, obtain a new security key for the second radio network node responsive to the first radio network node updating the second radio network node with the new security key.

A first radio network node for handling connections of a wireless device in a wireless communication network, wherein the first radio network node is configured as a master radio network node in a dual connectivity setup to the wireless device, wherein the dual connectivity setup provides a split signaling radio bearer to the wireless device from the first radio network node and from a second radio network node, wherein the second radio network node is a secondary radio network node, the first radio network comprising:

• processing circuitry;
• memory containing instructions executable by the processing circuitry whereby the first radio network node is operative to:
• receive a failure report from the wireless device via the second radio network node, the failure report indicating a radio link problem between the first radio network node and the wireless device;
• perform an evaluation of the failure report for initiating a handover process of the wireless device;
• and
• in response to receiving the failure report, receive a new security key for the second radio network node responsive to the first radio network node updating the second radio network node with the new security key.