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Most of smart-phones are equipped with several network interfaces. This evolution highlights the benefits of multi-homing which offer user access to services not only anywhere, at any time and from any network but also simultaneously. Due to the lack of multi-homing support in existing protocols, several issues remain. The main issue is to manage several paths between two communicating nodes at a...
Conventional layered protocols are not capable to handle the vagaries of Wireless Mesh Networks (WMN) such as rapidly changing wireless channel quality, battery power and network topology. Most WMN cross-layer proposals to overcome these problems utilize only a limited set of parameters from the concerned layers rendering them incapable of network and system wide optimizations as they do not consider...
Mobile devices like PDAs or mobile phones have become widespread. Similarly network functionality like GSM, Bluetooth or WLAN has become a standard. Nevertheless, not many applications take mobility into account. An application and its communication component are tightly coupled and the application assumes that network behavior does not change. Here in this paper we propose a new lightweight architecture...
Ad hoc network is an essential means of communication in disaster scenes. Validation of new communication protocols for these networks requires exhaustive simulation runs because real life experiences can be performed exclusively during expensive civil protection exercises. The necessity of these simulations calls for realistic and reliable mobility models which take into account numerous aspects...
The diverse communication requirements of different vehicular applications and the innate dynamicity of VANET networks complicate the design of a network layer proposal adequate for all applications and network conditions. This paper highlights the necessity for adaptation of network protocols in VANETs, and describes our ongoing work on a platform (adaptation framework) that will provide VANET developers...
Networking has experienced tremendous changes. Once dedicated to one single type of services, technologies are now offering integrated services: we want to have access to any services anywhere. One challenge is the mobility, with 3G terrestrial offers beginning to be successful. In such a context, satellite systems appear as a real opportunity since they may fill the gap between dense connected areas...
The IP Multimedia System (IMS) is a promising solution for converging new technologies with existing networks. The interworking environment and service flexibility that IMS offers to the currently deployed wireless broadband technologies, makes it appealing to users, service developers and network operators. In our previous work a heterogeneous network model based on IMS that integrates the Worldwide...
The InterMedia project aims at progressing towards user-centric convergence of multimedia, by putting the user at the center of services (multimedia applications), devices and interfaces for the interaction. One of the main implications of the user-centric approach is the seamless and secure access to content, regardless of the users' location and terminal device(s), which requires suitable solutions...
Today, users want to have simultaneously mobility, Quality of Service (QoS) and be always connected to Internet. Therefore, this paper proposes a QoS micro-mobility solution able to provide QoS support for global mobility. The solution comprises enhancements in the mobility management of Mobile IPv6 (MIPv6) and in the resources management of Differentiated Services (DiffServ) QoS model. The mobility...
In this paper we propose the three schemes to support seamless multicast handover in the Proxy Mobile IPv6 (PMIPv6) based wireless networks. In the existing scheme, there is a problem of packet loss and larger handover latency, in which Mobile Node (MN) cannot receive the multicast data packets until the new Mobile Access Gateway (MAG) completes the Proxy Binding Update with Local Mobility Anchor...
As the Internet continues to shape and reshape our lives, there is a parallel phenomenon taking place in wireless communication which is equally influential. Mobile communication has proved to be a major paradigm in the history of human communication. As both the Internet and mobile telephony continue their dramatic advances, there is a lot of requirement that should be available such as valid IP...
Wireless networks will certainly run applications with strict QoS requirements and so, micro-mobility protocols such as fast hierarchical mobile IPv6 (FHMIP) are useful tools to accomplish this new feature. The FHMIP is an effective scheme to reduce Mobile IPv6 handover disruption, however it does not support application's QoS requirements. Therefore, in order to provide QoS guarantees for real-time...
The Proxy Mobile IPv6 (PMIPv6) is a network localized mobility management protocol that is independent of global mobility management protocols. In a single mobility domain (LMD), the mobile node (MN) is not involved in any IP mobility-related signaling and uses only its PMIPv6 home address for all its communication. Subsequently, when the MN moves into another LMD, the MN must change its PMIPv6 home...
Starting with an efficient mobility management scheme for heterogeneous wireless networks, this paper proposes a solution for AAA handling using a common database for storing user information. Regardless of the access technology selected, user@realm identities are used for authentication, authorization, and accounting. In particular, a new function is introduced in which port-based network access...
We propose a framework to optimize the communication performance and mobility management in vehicular networks. By having a single unified decision algorithm taking into account both stack-related and external contextual information such as GPS localization or signaling from other nodes, advice can be provided to every layer in the network stack to allow for globally optimized, faster and more accurate...
Together with the IMO's future navigation system implementation strategy, the e-navigation, wireless access technologies are proliferating on the maritime scenario, covering last mile communications. In the near future, we foresee that communication technologies will coexist and will be available in overlapping areas through the maritime last mile. Therefore, in order to enhace ship-shore communications,...
Today users are getting used to have many heterogeneous devices available in their surroundings. This opens great opportunities to build pervasive communication environments. Pervasive communications are usually user-centric in nature, as they should target sessions to users rather than their specific devices. Mobility is a key issue in such context: users often move and that implies different devices...
A proliferation of mobile devices with several bundled network access technologies is taking place, which when combined with the wide deployment of more wireless networks, creates an unprecedented multiaccess environment. At the same time, though, communications become far more complex, if one wants to fully take advantage of the opportunities unveiled in this new setting. In recent years there has...
Proxy Mobile IPv6 has been standardized as a network-based mobility management protocol in IETF. To optimize mobile node's handover performance, a context of the mobile node such as its identifier, accounting, authentication and authorization states is expected to be transferred between mobility entities. This paper proposes a simple context transfer mechanism named Context Reflector for Proxy Mobile...
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