Abstract: Methods and systems for maintaining a connection between a first node and a second node communicating via a connection within a communication network. Data is communicated between the nodes on the basis of addresses assigned to the respective nodes. The addresses are managed by an address management node of the communication network. The system includes a detector unit, at the first node, configured to detect an outage of the existing connection between the nodes, a consulting unit, at the first node, configured to consult after detecting the outage of the connection, the address management node to verify the address assigned to the second node, a transceiver unit, at the address management node, configured to return a current address assigned to the second node, and a connection re-establisher unit, at the first node, configured to re-establish the connection based on the current address assigned to the second node.

Abstract: A client and a host communicate in a packet data network including a plurality of routing nodes such as routers and firewalls. The host is configured to provide the client with a session and to detect the accessibility of the client by repeatedly sending keep-alive messages to the client. In order to reduce the traffic actually arriving at the client, at least some of the keep-alive message are adjusted such that their routing towards the client will be stopped before the client by storing in a Time-To-Live field specified in the Internet Protocol a value of maximum routing hops defined to correspond with the last routing node before the client on a route from the host to the client. The adaptation of the keep-alive message can also be configured to allow some keep-alive message to reach the client to occasionally test the communication path between the client and server.

Abstract: A client and a host communicate in a packet data network including a plurality of routing nodes such as routers and firewalls. The host is configured to provide the client with a session and to detect the accessibility of the client by repeatedly sending keep-alive messages to the client. In order to reduce the traffic actually arriving at the client, at least some of the keep-alive message are adjusted such that their routing towards the client will be stopped before the client by storing in a Time-To-Live field specified in the Internet Protocol a value of maximum routing hops defined to correspond with the last routing node before the client on a route from the host to the client. The adaptation of the keep-alive message can also be configured to allow some keep-alive message to reach the client to occasionally test the communication path between the client and server.

Abstract: The present invention refers to a method performed in and corresponding nodes constituting a system which is configured to maintain an existing connection between a first node (A) and a second node (B) communicating with each other via a connection within a communication network. Data is communicated between the nodes (A, B) via the connection on the basis of addresses assigned to the respective nodes. The addresses are managed by an address management node (Addr_Serv) of the communication network.

Abstract: A communication network for providing seamless peer-to-peer connectivity between nodes of different communication network environments, the communication network comprising at least one tunneling server comprising an access unit for providing access to the communication network and an addressing unit for assigning a dynamic address of a first addressing scheme routable in the communication network to a node connecting itself to the tunneling server, the node having a fixed address of a second addressing scheme, and storing at runtime an association between the fixed address of the second addressing scheme and the dynamic address of the first addressing scheme.

Abstract: A communication network for providing seamless peer-to-peer connectivity between nodes of different communication network environments, the communication network comprising at least one tunneling server comprising an access unit for providing access to the communication network and an addressing unit for assigning a dynamic address of a first addressing scheme routable in the communication network to a node connecting itself to the tunneling server, the node having a fixed address of a second addressing scheme, and storing at runtime an association between the fixed address of the second addressing scheme and the dynamic address of the first addressing scheme.

Abstract: Local discovery of mobile network services involves coupling a communications device to a local network segment of a mobile data network. An announcement is sent from the communication device and/or a network entity (such as a network proxy) describing a service available via the respective devices. The announcement is receivable by any device on the local network segment. A request is received at the device for a detailed description of the service information in response to the announcement.

Abstract: Authentication information of a first node is received which are used for verification of remote nodes' authentication attempts, and a token is received from at least one remote node. Authentication of the at least one remote node is performed based on the token, and, if the authentication is successful, rules of a firewall are set through which all communication towards a first node goes to accept packets from an address of the remote node to the address of the first node.