Method and device for handling multi path connections

A method performed by a network node for handling multi path routing of data packets, the method comprises:

• establishing a multi path connection with a target network node, the multi path connection comprising a plurality of paths over which data packets can be transmitted to the target network node;
• obtaining information relating to the quality of the plurality of paths;
• determining, based on the obtained information, whether a path in the plurality of paths has been disconnected or is about to be disconnected;
• and
• activating at least one substitution path for use in the multi path connection, if it is determined that a path in the plurality of paths has been disconnected or is about to be disconnected, to enable transmission of data packets intended to be transmitted on the path determined to be disconnected or about to be disconnected over the at least one substitution path;
• wherein the method further comprises setting up the at least one substitution path in dependence on comparing the obtained information relating to the quality of the plurality of paths with a first threshold, and activating the at least one substitution path for use in the multi path connection comprises activating the at least one substitution path in dependence on comparing the obtained information relating to the quality of the plurality paths with a second threshold, wherein the second threshold is used for determining that a path in the plurality of paths has been disconnected or is about to be disconnected.

A network node configured to handle multi path routing of data, wherein the network node comprises:

• communication circuitry;
• and
• processing circuitry configured to:
• establish, via the communication circuitry, a multi path connection with a target network node, the multi path connection comprising a plurality of paths over which data packets are transmitted to the target network node;
• obtain information relating to the quality of the plurality of paths;
• determine, based on the obtained information, whether a path in the plurality of paths has been disconnected or is about to be disconnected;
• and
• activate at least one substitution path for use in the multi path connection, if it is determined that a path in the plurality of paths has been disconnected or is about to be disconnected, to enable data packets intended to be transmitted on the path determined to be disconnected or about to be disconnected, over the at least one substitution path;
• wherein the processing circuitry is further configured to set up the at least one substitution path based on a first comparison with the obtained information and configured to activate the at least one substitution path based on a second comparison with the obtained information, said second comparison being used to determine whether a path in the plurality of paths has been or is about to be disconnected.

A network node configured to handle multi path routing of data, wherein the network node comprises:

• communication circuitry;
• and
• processing circuitry configured to:
• establish, via the communication circuitry, a multi path connection with a target network node, the multi path connection comprising a plurality of paths over which data packets are transmitted to the target network node;
• obtain information relating to the quality of the plurality of paths;
• determine, based on the obtained information, whether a path in the plurality of paths has been disconnected or is about to be disconnected;
• and
• activate at least one substitution path for use in the multi path connection, if it is determined that a path in the plurality of paths has been disconnected or is about to be disconnected, to enable data packets intended to be transmitted on the path determined to be disconnected or about to be disconnected, over the at least one substitution path;
• wherein the processing circuitry is further configured to set up the at least one substitution path in dependence on comparing the obtained information relating to the quality of the plurality of paths with a first threshold, and to activate the at least one substitution path for use in the multi path connection in dependence on comparing the obtained information relating to the quality of the plurality of paths with a second threshold that is used for determining that a path has been disconnected or is about to be disconnected.