Routing of Sessions to Other Communication Networks

A method for routing a session invitation from a first communication network to a second communication network;

• the first communication network and the second communication network being interconnected via at least two points of interconnect;
• the first communication network and the second communication network stretching across at least two common geographical regions;
• the at least two points of interconnect being located in different common geographical regions;
• the method comprising:
• a first control node receiving a session invitation to a first user equipment, the first control node and the first user equipment being part of the first communication network;
• the first control node determining whether a breakout condition for routing of the session invitation to the second communication network is fulfilled;
• and
• based on a result of determining, a second control node selecting one of the at least two points of interconnect to the second communication network, the second control node being part of the first communication network;
• wherein the selection is based on capability information characterizing capabilities of the first control node.

A method in a control node for routing a session invitation from a first communication network to a second communication network;

• the control node being part of the first communication network;
• the method comprising:
• determining whether a breakout condition for routing of a session invitation to the second communication network is fulfilled;
• and
• subsequent to the determining of the breakout condition, sending the session invitation to a second control node, wherein the session invitation comprises capability information characterizing capabilities of the control node, if the capability information is stored in the control node.

A method in a control node for routing a session invitation from a first communication network to a second communication network;

• the first communication network and the second communication network being interconnected via at least two points of interconnect;
• the first communication network and the second communication network stretching across at least two common geographical regions;
• the at least two points of interconnect being located in different common geographical regions;
• the control node being part of the first communication network;
• the method comprising:
• receiving a session invitation to a user equipment, the session invitation comprising capability information characterizing capabilities of a first control node, wherein the user equipment is part of the second communication network, wherein the first control node is part of the first communication network;
• and
• selecting one of the at least two points of interconnect to the second communication network, wherein the selection is based on the capability information.

A method in a control node for registration of a user equipment in a first communication network;

• the control node and the user equipment being part of the first communication network;
• the method comprising:
• receiving a query response from a subscriber database comprising capability information characterizing capabilities required for a first control node, wherein the capability information comprises information in which geographical region of the first communication network the user equipment is located;
• selecting a first control node based on the received capability information, wherein the first control node is part of the first communication network;
• and
• sending a registration request to the first control node, wherein the registration request comprises the capability information.

A control node for routing a session invitation from a first communication network to a second communication network;

• the control node being part of the first communication network;
• the control node comprising:
• one or more processing circuits configured to:
• determine whether a breakout condition for routing of a session invitation to the second communication network is fulfilled;
• and
• subsequent to the determining of the breakout condition, send the session invitation to a second control node, wherein the session invitation comprises capability information characterizing capabilities of the control node, if the capability information is stored in the control node.

A control node for routing a session invitation from a first communication network to a second communication network;

• the first communication network and the second communication network being interconnected via at least two points of interconnect;
• the first communication network and the second communication network stretching across at least two common geographical regions;
• the at least two points of interconnect being located in different common geographical regions;
• the control node being part of the first communication network;
• the control node comprising:
• one or more processing circuits configured to:
• receive a session invitation to a user equipment, the session invitation comprising capability information characterizing capabilities of a first control node, wherein the user equipment is part of the second communication network, and the first control node is part of the first communication network;
• and
• select one of the at least two points of interconnect to the second communication network, wherein the selection is based on the capability information.

A control node for registration of a user equipment in a first communication network;

• the control node and the user equipment being part of the first communication network;
• the control node comprising:
• one or more processing circuits configured to:
• receive a query response from a subscriber database comprising capability information characterizing capabilities required for a first control node, wherein the capability information comprises information in which geographical region of the first communication network the user equipment is located;
• select a first control node based on the received capability information, wherein the first control node is part of the first communication network;
• and
• send a registration request to the first control node, wherein the registration request comprises the capability information.

A system for routing a session invitation from a first communication network to a second communication network;

• the first communication network and the second communication network being interconnected via at least two points of interconnect;
• the first communication network and the second communication network stretching across at least two common geographical regions;
• the at least two points of interconnect being located in different common geographical regions;
• the system comprising:
• a first control node;
• the first control node being part of the first communication network and comprising one or more processing circuits configured to:
• determine whether a breakout condition for routing of a session invitation to the second communication network is fulfilled;
• and
• subsequent to the determining of the breakout condition, send the session invitation to a second control node, wherein the session invitation comprises capability information characterizing capabilities of the control node, if the capability information is stored in the first control node;
• a second control node;
• the second control node being part of the first communication network and comprising one or more processing circuits configured to:
• receive a session invitation to a user equipment, the session invitation comprising capability information characterizing capabilities of the first control node, wherein the user equipment is part of the second communication network;
• and
• select one of the at least two points of interconnect to the second communication network, wherein the selection is based on capability information.

A computer program product stored in a non-transitory computer readable medium for routing a session invitation from a first communication network to a second communication network;

• the first communication network and the second communication network being interconnected via at least two points of interconnect;
• the first communication network and the second communication network stretching across at least two common geographical regions;
• the at least two points of interconnect being located in different common geographical regions;
• the computer program product comprising software instructions which, when run on processors of a first control node and a second control node, causes:
• the first control node to receive a session invitation to a first user equipment, the first control node and the first user equipment being part of the first communication network;
• the first control node to determine whether a breakout condition for routing of the session invitation to the second communication network is fulfilled;
• and
• based on a result of determining, a second control node to select one of the at least two points of interconnect to the second communication network, the second control node being part of the first communication network;
• wherein the selection is based on capability information characterizing capabilities of the first control node.