Method and nodes for handling a ue which has moved from an old location to a new location

A mobility node for handling a User Equipment, UE, which has moved from an old location to a new location, the mobility node being adapted to:

• retrieve UE context information from a database when the UE has moved from the old location to the new location, wherein the UE context information comprises mobility node information for a mobility node which currently serves the UE;
• determine whether there is a change to which mobility node and first gateway should serve the UE at the new location;
• when there is a change of the first gateway, initiate setup of a tunnel between a second gateway and a new first gateway;
• when there is a change of the mobility node, provide a subscriber server with UE context information comprising mobility node information for a new mobility node which serves the UE at the new location;
• and
• provide updated UE context information comprising mobility node information for the new mobility node to the database.

A method performed by a communications system for handling a User Equipment, UE, which has moved from an old location to a new location, the method comprising:

• retrieving, at a mobility node, a UE context information from a database has moved from the old location to the new location, wherein the UE context information comprises mobility node information for a mobility node which currently serves the UE;
• determining, at the mobility node whether there is a change to which mobility node and first gateway should serve the UE at the new location;
• when there is a change of the first gateway, initiating, at the mobility node, setup of a tunnel between a second gateway and a new first gateway;
• when there is a change of the mobility node, providing, from the mobility node to a subscriber server, UE context information comprising mobility node information for a new mobility node which serves the UE at the new location;
• when there is a change to which mobility node the UE is associated with when it has moved to the new location, obtaining, at the subscriber server and from a new mobility node, UE context information comprising mobility node information for the new mobility node which serves the UE at the new location;
• and
• transmitting updated UE context information comprising mobility node information for the new mobility node from the mobility node to the database.

A communications system for handling a User Equipment, UE, which has moved from an old location to a new location, the communications system being adapted to:

• retrieve, at a mobility node, UE context information from a database when the UE has moved from the old location to the new location, wherein the UE context information comprises mobility node information for a mobility node which currently serves the UE;
• determine, at the mobility node, whether there is a change to which mobility node and first gateway should serve the UE at the new location;
• when there is a change of the first gateway, initiate, at the mobility node, setup of a tunnel between a second gateway and a new first gateway;
• when there is a change of the mobility node, provide, from the mobility node to a subscriber server, UE context information comprising mobility node information for a new mobility node which serves the UE at the new location;
• when there is a change to which mobility node serves the UE at the new location, obtain, at the subscriber server and from a new mobility node, UE context information comprising mobility node information for the new mobility node which serves the UE at the new location;
• and transmit updated UE context information comprising mobility node information for the new mobility node from the mobility node to the database.