Local break-out in mobile ip networks

A system comprising a user plane for routing and transporting payload data, the system comprising:

• a terminal;
• a radio access node;
• a first user plane node connecting to a first external network;
• and
• a second user plane node connecting to a second external network,
• wherein the system is configured to:
• configure a first IPv6 prefix and a second IPv6 prefix;
• forward IP traffic stemming from the first IPv6 prefix in the second user plane node towards the first user plane node and further towards the first external network;
• and
• break out IP traffic stemming from the second IPv6 prefix in the second user plane node towards the second external network,
• wherein the system further comprises:
• a control plane;
• and
• a control plane node for controlling the first and the second user plane nodes,
• wherein:
• the terminal is configured to:
• authenticate before a radio access node and the control plane node;
• the control plane node is configured to:
• trigger a configuration of the first user plane node;
• the first user plane node is configured to:
• defining a first IP anchor in the first user plane node;
• and
• issue a first router advertisement including the first IPv6 prefix to the terminal,
• wherein the triggering of the configuration of the first user plane node and the defining of the first IP anchor in the first user plane node constitutes the configuring of the first IPv6 prefix, and
• wherein the control plane node is further configured to:
• trigger a configuration of the second user plane node;
• the second user plane node:
• defining a second IP anchor in the second user plane node;
• and
• issuing a second router advertisement including the second IPv6 prefix to the terminal,
• wherein the triggering of the configuration of the second user plane node and the defining of the second IP anchor in the second user plane node constitutes the configuring of the second IPv6 prefix;
• and
• wherein the control plane node is further configured to:
• receive a mobility event report related to a handover of the terminal from the first radio access node to a second radio access node, the control plane node, and in response thereto to perform:
• configuring a third user plane node for change of break-out point;
• issuing information to the second user plane node that the former break-out point is in the process of being taken down in the second user plane node;
• and
• issuing information about the change of break-out point to the first user plane node.

A second user plane node comprising:

• a user plane for routing and transporting payload data;
• and
• a control plane,
• wherein the second user plane node is in a system that comprises:
• a terminal;
• a radio access node;
• and
• a first user plane node connecting to a first external network,
• the second user plane node connects to a second external network,
• wherein the system further comprises a control plane and a control plane node for controlling the first and the second user plane nodes,
• wherein:
• the second user plane node is configured to:
• forward IP traffic stemming from the first IPv6 prefix in the second user plane node towards the first user plane node and further towards the first external network;
• and
• break out IP traffic stemming from the second IPv6 prefix in the second user plane node towards the second external network;
• the second user plane node is further configured to:
• define an IP anchor in the second user plane node;
• and
• issue a router advertisement including the second IPv6 prefix to the terminal;
• wherein:
• the triggering of the configuration of the second user plane node and the defining of the IP anchor in the second user plane node constitutes the configuring of the second IPv6 prefix;
• and
• the second user plane node is further configured to:
• receive information in the second user plane node from the control plane node that the break-out point is in the process of being taken down in the second user plane node.

A control plane node comprising:

• a user plane for routing and transporting payload data;
• and
• a control plane,
• wherein the control plane node is in a system comprising:
• a terminal;
• a radio access node;
• a first user plane node connecting to a first external network;
• and
• a second user plane node connecting to a second external network,
• wherein the system is adapted to:
• configure a first IPv6 prefix and a second IPv6 prefix;
• forward IP traffic stemming from the first IPv6 prefix in the second user plane node towards the first user plane node and further towards the first external network;
• break out IP traffic stemming from the second IPv6 prefix in the second user plane node towards the second external network,
• wherein the control plane node is configured to:
• trigger a configuration of the first user plane node, wherein a first IP anchor in the first user plane node is defined such that the first user plane node can issue a first router advertisement including the first IPv6 prefix to the terminal,
• wherein the triggering of the configuration of the first user plane node and the defining of the first IP anchor in the first user plane node constitutes the configuring of the first IPv6 prefix, and
• the control plane node is further configured to:
• trigger a configuration of the second user plane node, wherein a second IP anchor in the second user plane node is defined such that the second user plane node can issue a second router advertisement including the second IPv6 prefix to the terminal, wherein the triggering of the configuration of the second user plane node and the defining of the second IP anchor in the second user plane node constitutes the configuring of the second IPv6 prefix;
• and
• receive a mobility event report related to a handover of the terminal from the first radio access node to a second radio access node, and in response thereto to:
• configure a third user plane node for change of break-out point;
• issue information to the second user plane node that the former breakout point is in the process of being taken down in the second user plane node;
• and
• issue information about the change of break-out point to the first user plane node.

A method for a system comprising a user plane for routing and transporting payload data, the system comprising a terminal, a radio access node, a first user plane node connecting to a first external network, and a second user plane node connecting to a second external network, the method comprising:

• configuring a first IPv6 prefix and a second IPv6 prefix;
• forwarding IP traffic stemming from the first IPv6 prefix in the second user plane node towards the first user plane node and further towards the first external network;
• and
• breaking out IP traffic stemming from the second IPv6 prefix in the second user plane node towards the second external network,
• wherein the system further comprises a control plane and a control plane node for controlling the first and the second user plane nodes,
• wherein:
• the terminal performs:
• authenticating before a radio access node and the control plane node;
• the control plane node performs:
• triggering a configuration of the first user plane node;
• the first user plane node performs:
• defining a first IP anchor in the first user plane node;
• and
• issuing a first router advertisement including the first IPv6 prefix to the terminal,
• wherein the triggering of the configuration of the first user plane node and the defining of the first IP anchor in the first user plane node constitutes the configuring of the first IPv6 prefix,
• the control plane node further performs:
• triggering a configuration of the second user plane node,
• the second user plane node performs:
• defining a second IP anchor in the second user plane node;
• and
• issuing a second router advertisement, RA, including the second IPv6 prefix to the terminal,
• wherein the triggering of the configuration of the second user plane node and the defining of the second IP anchor in the second user plane node constitutes the configuring of the second IPv6 prefix,
• wherein the control plane node further performs, when receiving a mobility event report related to a handover of the terminal from the first radio access node to a second radio access node, the control plane node:
• configuring a third user plane node for change of break-out point;
• issuing information to the second user plane node that the former break-out point being in the process of being taken down in the second user plane node;
• and
• issuing information about the change of break-out point to the first user plane node.

A method for a second user plane node in a system comprising a user plane for routing and transporting payload data and a control plane, the system comprising a terminal, a radio access node, and a first user plane node connecting to a first external network, the second user plane node connecting to a second external network, wherein the system moreover comprises a control plane and a control plane node for controlling the first and the second user plane nodes,

• the second user plane node method comprising:
• forwarding IP traffic stemming from the first IPv6 prefix in the second user plane node towards the first user plane node and further towards the first external network;
• breaking out IP traffic stemming from the second IPv6 prefix in the second user plane node towards the second external network;
• defining an IP anchor in the second user plane node;
• and
• issuing a router advertisement including the second IPv6 prefix to the terminal,
• wherein the triggering of the configuration of the second user plane node and the defining of the IP anchor in the second user plane node constitutes the configuring of the second IPv6 prefix,
• the second user plane node method further comprising:
• receiving information in the second user plane node from the control plane node that the break-out point is in the process of being taken down in the second user plane node.

A method for a control plane node in a system comprising a user plane for routing and transporting payload data and a control plane, the system comprising a terminal, a radio access node, a first user plane node connecting to a first external network, and a second user plane node connecting to a second external network,

• the method comprising:
• configuring a first IPv6 prefix and a second IPv6 prefix;
• forwarding IP traffic stemming from the first IPv6 prefix in the second user plane node towards the first user plane node and further to-wards the first external network;
• breaking out IP traffic stemming from the second IPv6 prefix in the second user plane node towards the second external network;
• triggering a configuration of the first user plane node, wherein a first IP anchor in the first user plane node is defined such that the first user plane node can issue a first router advertisement including the first IPv6 prefix to the terminal, wherein the triggering of the configuration of the first user plane node and the defining of the first IP anchor in the first user plane node constitutes the configuring of the first IPv6 prefix;
• triggering a configuration of the second user plane node, wherein a second IP anchor in the second user plane node is defined such that the second user plane node can issue a second router advertisement including the second IPv6 prefix to the terminal, wherein the triggering of the configuration of the second user plane node and the defining of the second IP anchor in the second user plane node constitutes the configuring of the second IPv6 prefix;
• receiving a mobility event report related to a handover of the terminal from the first radio access node to a second radio access node, and in response the control plane node performing:
• configuring a third user plane node for change of break-out point;
• issuing information to the second user plane node that the former break-out point is in the process of being taken down in the second user plane node;
• and
• issuing information about the change of break-out point to the first user plane node.