This paper describes practical tests and evaluation of different ways in which the session initiation protocol (SIP) could be used to assist application adaptation for IP applications during a vertical handover (VH), that is one between base stations that are using different wireless link technologies. Such an approach has been implemented on a software testbed based at the Centre for Telecommunication Research (CTR), King's College London as part of a joint project with BTexact Technologies.

Absrruct -In this paper we provide an own,iew of the ASCOT pvoject and present intermediate results on investigations concerning addrcss management. ASCOT considers managed whicular networks, i.e. moving network attached to public transport vehicles that provide network ronncrtivity to its pdSSmgcrs. Wc briefly describe how ASCOT positions itself among other projects and activities that focus on moving network aspects. We considcr addressing: the pros and cons of the various options for the addressing of end user terminals -including a brief discussion o f tbe relevant end user requirements and the impact on mobility management.

This paper focuses on the problem mobile terminals face when different protocols operate for providing the same service between visited access networks. Examples of such services are mobility management and QoS signaling. This plethora of protocols can restrict a mobile terminal from using the offered service since it might not be equipped with the appropriate software. This problem can be solved with the use of software reconfiguration. We present a framework for constructing mobile terminal architectures capable of dynamically reconfiguring between protocols that offer the same service. Then we employ the framework to construct two architectures; one capable of adapting to the offered mobility protocol and one capable of adapting to the offered QoS signaling protocol. Finally, we present an implementation of the emerged architectures and estimate through experiments their reconfiguration time.

This paper presents the design and evaluation of a reconfigurable mobile terminal focusing on IP mobility protocols. The presented terminal architecture is capable of dynamically modifying its operation so as to employ the mobility services offered from the visited access networks. The fundamental concept in the architecture is that mobility protocols terminal operation can be modeled with a certain group of functional abstractions. As a consequence, only a few particular functional parts of the architecture need to be modified so as to implement a new mobility protocol. Evaluation results show that the terminal performance complies with the expected behavior and, further, that the reconfiguration process is accomplished within a few milliseconds 1 .

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