Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Corporation of America

Godo Kaisha IP Bridge 1

Rolf Hakenberg

Jens Bachmann

Kilian Weniger

Carsten Burmeister

Jose Luis Rey

Akihiro Miyazaki

Hideaki Fukushima

Ralf Becker

Ivica Rimac

Osvaldo Gonsa

Thomas Wiebke

Genadi Velev

Fernando Berzosa

Thomas Klinner

Jon Schuringa

Michael Zink

Killian Weniger

Luis Jose Rey

José Rey

José Luis Rey

The invention relates to the initiation of a service to a mobile terminal capable of communicating via at least a first and second access network. Further, the invention relates to a reduction of power consumption of mobile terminals supporting connectivity to at least two access networks. The invention also relates to mobile communication systems and in particular to mobile communications through heterogeneous access networks. In order to prove improved method for initiating services to mobile terminals and/or to reduce power consumption of mobile terminals, the invention introduces of a sleep state that can be entered by the terminal for an access system if same is not used. Upon requesting a service from/to the mobile terminal, the mobile terminal starts service initiation through a second access system and transits back to active state for the first access system for service provision.

Sleep-state for mobile terminal and service initiation for mobile terminals in sleep-state

The invention relates to a method for configuring a context for a connection delivering a packet data service to a mobile terminal via a target wireless access network. The mobile terminal is initially connected to an originating wireless access network and the packet data service may be provided to the mobile terminal via the originating wireless network. Moreover, the invention provides an authentication server, a packet data gateway and a packet data service support node which participate in the context configuration method. To provide a method that allows establishing connection for packet service delivery to a mobile terminal from a wireless access network, as for example a UMTS, as fast as possible the invention suggests to preconfigure service provision of the packet data service via the target wireless access network by establishing a context prior to the mobile terminal connecting to the target wireless access network.

Network initiated context establishment

A data transmission apparatus for sequentially transmitting data in units of packets each containing transmission data to the receiving end, comprises: a reception unit for receiving the transmission data as an input signal; a packet formation unit for receiving the transmission data received, and forming an uncompressed packet in which predetermined transmission data is stored as uncompressed data, and a compressed packet in which at least a portion of transmission data that follows the predetermined transmission data is compressed and stored as compressed data; a reference information management unit for holding and managing, as reference information, information relating to the uncompressed packet formed by the packet formation unit; and a transmission unit for transmitting the respective packets formed by the packet formation unit, as a transmission signal, to the receiving end. The packet formation unit forms compressed data to be stored in a compressed packet, on the basis of the transmission data of the uncompressed packet and the reference information stored in the reference information management unit. Therefore, the number of packets to be discarded at the receiving end due to an error which has occurred in the radio section is reduced, whereby the quality of data transmitted in the transmission path including the radio section is improved.

Data transmission method, data transmission apparatus, data reception apparatus, and packet data structure

A method and apparatus for improved context transfer in heterogeneous networks is presented. Context information is collected from source entities in a first access network by a context transfer manager and transmitted to a context transfer manager of a second access network which forwards the context information to target entities therein. In one of the context transfer managers at least a part of the context information is translated from a format supported in the first access network to another format supported in the second access network. The method may be carried out proactively preceding a handover or reactively following a handover. In one embodiment, context transfer within one access domain is performed directly between access routers, whereas context transfer between different access domains is performed via the context managers. In another embodiment, beacons from access points are counted in order to determine candidates for a pending handover.

Inter-domain context transfer using context transfer managers

The invention relates to a method for packet switched data transmission in a local network, the local network comprising a mobile node and a plurality of interconnected connection anchor points each with a link at which the mobile node can attach. The method comprises the steps of detecting a movement of the mobile node from a first connection anchor point to a second connection anchor point, the mobile node communicating via a tunneled connection between the first and second connection anchor point, maintaining the existing tunneled connections between the second connection anchor point and the first connection anchor point, and enabling new connections between the mobile node and correspondent nodes using addresses that are topologically correct.

Connection based local IP-mobility

The invention relates to a method performed by a home agent serving a mobile node in a home network upon attachment of a mobile node to the home network as well as to the home agent. The invention also relates to a method for enabling simultaneous use of a plurality of interfaces by a mobile node being attached to a home network through one of the plurality of interfaces and to at least one foreign network through at least another interface of the plurality of interfaces. Moreover, the invention provides a mobile node and a proxy acting on behalf of the mobile node. To enable a mobile node to use a home network and at least one foreign network for communications the invention suggests the registration of the mobile node's home address or of a network node's address within its home network as a care-of address in the home network.

Enabling simultaneous use of home network and foreign network by a multihomed mobile node

Growing community of inventors

Langen, Germany

Rolf Hakenberg