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The Proxy Mobile IPv6 (PMIPv6) have been widely studied as a mobility management protocol to effectively use the limited wireless resources. Recently, there have been some researches to apply PMIPv6 to multicasting, which is core technology of Internet broadcast system. However, PMIPv6 based multicasting has a problem in that it shows the disconnection of services during the handover because it does...
Application Layer Multicast (ALM) has become a popular form of content distribution. It shows some favourable properties like inherent scalability and the overcoming of the traditional client-server bottleneck. In the future, a large fraction of the participants in ALM systems will be mobile (eg. smart-phones or netbooks) and demand for a proper inclusion and mobility handling. After analyzing current...
A mobility management scheme for an all-IP Wireless Metropolitan Area Network (WMAN) is developed in this paper. The proposed scheme is topology-independent and user-independent, in the sense that it does not assume any mobility pattern, delay constraint, or network topology. The key idea is to use a topology-learning algorithm that enables to perform localized mobility management, by efficiently...
One of the main challenges in all-IP networks is the development of suitable mobility solution. Mobile IP (MIP) presents the standard protocol used to support IP mobility. However, MIP is inadequate for real-time applications and inter-domain mobility (when a mobile node performs handover between two autonomous systems (AS)). In this paper, we propose an efficient approach to manage inter-domain handover...
Since IPv6 is designed for fixed hosts, the extension of IPv6 to mobile IPv6 is necessary for management in mobile and wireless environment. In this paper, we present an assessment of current mobile IPv6 performance by the means of the network simulator ns-2 and its extension MOBIWAN. Three different tests have been carried out with different traffic types on different network topologies. We investigate...
The aim of future IP-based wireless communications is to provide mobile users access to the desired service with the appropriate quality at any place. Besides mobility support and QoS provision, the increase of wireless heterogeneous access is equally significant for fulfilling such a vision. This increase of wireless access is associated with expanding the core IP network infrastructure, raising...
Recently, large-scale IP-based sensor technology (e.g., 6LoWPAN) is emerging for new requirements such as availability, manageability, survivability, stability, and mobility in sensor networks. 6LoWPAN standards are being developed to work on IPv6 over IEEE 802.15.4 specifications. 6LoWPANs can support various topologies like mesh as well as star. Mesh topologies imply multi-hop routing, to a desired...
Resource reservation in mobile environments is an important task in the future when the userpsilas point of attachment to the network changes frequently due to mobility. One crucial issue of this task is to release unnecessary reservation along old path after departure of mobile node(s). Although this can be done automatically by a soft state mechanism, default soft statepsilas lifetime which is conceived...
This paper proposes a new heterogeneous multi-hop cellular IP (MCIP) network that integrates multi-hop communication with cellular IP. MCIP increases the coverage of the wireless network and improves the network robustness against adverse propagation phenomena by supporting communication in dead zones and areas with poor radio coverage. MCIP includes three components: location management, connection...
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