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The work package has a special focus on providing mobility across various access technologies, while optimizing QoS at layers 2 and 3. Among the access technologies that will be integrated are DVB technologies for broadcast, thereby supporting the project-wide goal of integrating mobility and broadcast. The items dealt with include advanced seamless handover technologies that may be initiated by the terminal or the network, knowledge of the status of the network, including access point capabilities, and the full integration with the service platform and the registration and authorization process defined by Work Package 3. Besides the regular single-hop access to access points of the network, the work package also covers moving networks, i.e. the use of mobile routers in moving vehicles, and the integration of ad-hoc networks with the infrastructure. Over all this work, emphasis is placed on providing adequate security for these solutions.

• Enhanced handover support: Integration of several handover functions, such as CARD, fast handover both by the network and by the terminal, as well as intelligent interface selection.
• Use of UML/SDL to solve feature interaction problems: This work deals with how to enable the combination of several protocols without unpredicted behaviour.
• Paging: Simulations to support power saving by putting terminals in power-save mode with emphasis on layer 2 / layer 3 optimisations.
  Multi-homing support: Load-balancing based on a single home address and multiple care-of address approach.
• Performance Management: Network-initiated handover based on measuring link quality and deciding on handover based on the measured quality.
• QoS in 802.11e admission control algorithms: This provides QoS guarantees for real-time & data applications.
• QoS in TD-CDMA, 802.15, 802.16 & 802.11: Layer 2 QoS mechanisms for wireless technologies, design of an Abstraction Layer to combine in a single architecture.
• End-to-end QoS for mobile terminals: Architecture that provides QoS guarantees for the end-to-end path and supports inter and intra-domain handovers.
• Ad-hoc networks Integration support: Gateway discovery, routing, support of both unicast and multicast, as well as multipath and QoS support.
• Handover between ad-hoc networks with MIPv6 support: Design & implementation of a mechanism for the handover between ad-hoc networks.
• QoS for combined ad-hoc & infrastructure: QoS between users in different ad-hoc or non-ad-hoc networks.
• Lightweight secure charging / rewarding: Provide incentives for cooperative behaviour with minimal overhead when nodes may act selfishly to save battery power.
• Network Mobility Route Optimisation: Design and implementation of a set of mechanisms to improve performance of NEMO Basic Support.
• Network Mobility Multicast support: Design and implementation of mechanisms that enable multicast traffic in mobile networks.
• Concealed Data Aggregation: Efficient and secure gathering and forwarding of data in sensor networks that resists several attacks, also covering physical manipulation.
• Key distribution for CDA: Specialised key distribution in a sensor network scenario that defines "routable regions" and re-election of sensors for specific functions or non-functions for robustness.
• CGA/SEND fast handover integration: Ensuring that SEND/CGA does not compromise the speed of integration.
• Integration with PANA: Ensure that access network and core network security work together, i.e. with work package 3 security solutions.

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