Abstract: A method and system for supporting mobile routers in Internet Protocol version 6 (IPv6) is provided. A mobile router obtains a care-of-address associated with an address configuration. The mobile router registers the care-of-address with a home agent. A bi-directional tunnel is established between the mobile router and the home agent. Packets are then forwarded via the bi-directional tunnel.

Abstract: A communication system is disclosed including at least a communication network, one caller party equipped with a communication device by using of which the caller party may originate a communication, one called party equipped with communication means by using of which the called party may response to the communication originated by the caller party and one or more network elements arranged in communication network for arranging the communication between the caller and called parties and which of network elements at least part are arranged to be operated as VoIP system elements in order to arrange VoIP-based communication. In communication system is arranged to be implemented as features a protocol enabling an availability of a presence information of at least the communication means of the called party and an universal designation feature in order to form a destination address for the communication from the caller party to the called party.

Abstract: A system is provided for prefix delegation with a pre-configured home agent, having a home address, and having a set of mobile router prefixes that are available to delegate to mobile routers. The transceiver of the home agent receives a prefix request option from a mobile router to request a prefix. The home agent assigns a prefix by combining a selected one of the set of mobile router prefixes with at least a part of the home address of the home agent, and sends the assigned prefix to the mobile router. Alternatively, the home agent assigns a prefix by combining a selected one of the set of mobile router prefixes with at least a part of the home address of the mobile router, and sends the assigned prefix to the mobile router.

Abstract: The invention proposes a system for authenticating and authorizing network services comprising: a mobile device being adapted to, upon receipt of an information message indicating at least one network access type, determine the network access type, to create a start message containing at least a user identity, and to encapsulate the start message in an authentication message compatible with the access network identified in the information message, and an access controller for reading the encapsulated message from the mobile and forwarding the encapsulated message to an authentication server identified in the encapsulated message. The invention also proposes a corresponding method for authenticating and authorizing network services, and an access control device, a subscriber device and a router device.