Abstract:
The present invention relates to a method and apparatus for preventing endless tunnel looping in a mobile communication network. An originating home agent inserts an extended TEL option into a packet that is being forwarded by the originating home agent. The extended TEL option includes an address of the originating home agent and indicates the original tunnel entry point of the packet. When another home agent receives the forwarded packet containing the extended TEL option, the receiving home agent may send a loop risk indicator (LRI) to the originating home agent to inform the originating home agent of the tunnel looping risk. The originating home agent may then use the conventional TEL option for subsequent packets forwarded during that particular mobility session for the mobile terminal.
Abstract:
Devices, systems, methods and software are described which provide identity assignment and redistribution capabilities for software components of a distributed application. Identity value ranges can be fixed or variable. Identity assignment schemes according to exemplary embodiments facilitate the continuation of traffic between the components and clients during redistribution of the identities.
Abstract:
Methods and nodes are provided for supporting session continuity for terminals capable of having simultaneous accesses while served by a plurality of gateways. Distinct binding cache entries (BCE) are stored for a terminal, each BCE being related to one of the gateways serving the terminal. The BCEs identify the terminal, provide an address allocated thereto for getting access at a gateway, and identify the gateway providing the access. When detection is made that two of more BCEs relate to the same terminal for distinct gateways, address information is sent to each other gateway.
Abstract:
Methods and nodes are provided for efficiently establishing a route between a mobile node and a correspondent node in a Proxy Mobile Internet Protocol network. A return routability procedure is used between a local mobility anchor and a media access gateway on one hand, and the correspondent node on the other hand. The procedure is made without involvement from the mobile node. The procedure is such that the correspondent node handles return routability as per standard mobile IP mechanisms. Following this return routability procedure, a binding of an address of the mobile node with an address of the media access gateway is stored in the correspondent node. This binding allows data traffic to flow between the mobile node and the correspondent node without passing through the local mobility anchor.
Abstract:
Methods, a data source and a router are provided to fragment packets that are to be sent in multicast mode towards a plurality of destinations comprised in a multicast group. Each router along a path leading from the data source towards some of the destinations sends its maximum transmission unit value in an uplink direction. Each router directly connected to the data source calculates a lowest maximum transmission unit based on various maximum transmission unit values received from downstream routers. The data source receives from each of the directly connected routers a maximum transmission unit value, which is certain to be acceptable to all routers and destinations of the multicast group downstream of that directly connected router. The data source selects a lowest one of the received maximum transmission unit values and fragments data contents accordingly.
Abstract:
Reduction of overhead normally caused by the addition of a second IP header in case of tunneling between a home agent and a mobile node located in a foreign network is achieved by replacing an encapsulated first IP header by a tunnel identifier. The home agent and the mobile node agree on a tunnel identifier value at the time of binding update and acknowledgement. The tunnel identifier may be used independently at the home agent and at the mobile node to reconstruct the first IP header, which identifies a correspondent node. Because the encapsulated first IP header is not terminated at either of the home agent or mobile node, overhead reduction is not impacted by eventual transmission error or loss between these two nodes.
Abstract:
A method, a correspondent node and a mobile node provide anonymity and unlinkability to a mobile node in a session with a correspondent node. Sequence values, calculated based on secret data, are added to updates sent from the mobile node towards the correspondent node and are used by the correspondent node to authenticate updates from the mobile node. A home address of the mobile node is not explicitly disclosed. An expected care-of address is calculated at the correspondent node and used by the correspondent node to send data packets to the mobile node.
Abstract:
A method and a Mobile Node are provided for authenticating an Advertisement message received from an Access Router through an Access Point. The Advertisement message comprises a Hashed Nonce Value and a Nonce Index corresponding to a Nonce Value held in the Access Router. Upon receiving the Advertisement message from the Access Point, the Mobile Node initiates a process for configuring an IP address, by use of information received in the Advertisement, for having a session with the Access Point and the Access Router. In parallel, either the Access Point or the Mobile Node sends the Nonce Index directly to the Access Router. The Access Router replies with the Nonce Value sent to the Mobile Node. The Mobile Node hashes the Nonce Value received from the Access Router and compares a Result of the hashing with the Hashed Nonce Value. If the Result matches the Hashed Nonce Value, the Advertisement is considered authenticated and the IP address configured according to the Advertisement is kept in the Mobile Node.
Abstract:
A method of enhancing Quality of Experience (QoE) associated with an application flow for an end-user in a communication network comprises: receiving a packet belonging to the application flow, the packet comprising QoE information determined based on previous packets exchanged within the application flow; decoding the QoE information from the received packet; and adjusting a QoS mechanism for the packet, based on the decoded QoE information for enhancing the QoE of the application flow. A network node for carrying out this method is disclosed. Also, a method for relaying QoE associated with an application flow for an end-user in a communication network comprises: receiving packets belonging to the application flow; calculating QoE information based on the received packets; and sending the calculated QoE information back to the communication network, the QoE information being included in a packet belonging to the application flow. A network node for carrying out this method is disclosed.
Abstract:
A method and a Mobile Node are provided for authenticating an Advertisement message received from an Access Router through an Access Point. The Advertisement message comprises a Hashed Nonce Value and a Nonce Index corresponding to a Nonce Value held in the Access Router. Upon receiving the Advertisement message from the Access Point, the Mobile Node initiates a process for configuring an IP address, by use of information received in the Advertisement, for having a session with the Access Point and the Access Router. In parallel, either the Access Point or the Mobile Node sends the Nonce Index directly to the Access Router. The Access Router replies with the Nonce Value sent to the Mobile Node. The Mobile Node hashes the Nonce Value received from the Access Router and compares a Result of the hashing with the Hashed Nonce Value. If the Result matches the Hashed Nonce Value, the Advertisement is considered authenticated and the IP address configured according to the Advertisement is kept in the Mobile Node.