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The private mobile radios (PMRs) play a key role in public safety, emergency and rescue missions, patrolling and military operations, allowing the fast deployment of robust and effective communication networks able to cover a wide area of interest. Unfortunately, they do not offer high performance in terms of throughput and QoS if compared with well-established and emerging wireless technologies such...
Nowadays, networks are large heterogeneous systems in which efficient and effective support for multi-access technologies is imperative. The enhanced performance and availability of various technologies like WiFi, WiMax, and UMTS have motivated network users towards increased utilization. In these heterogeneous networks, a seamless connectivity with acceptable level of quality should be maintained...
Currently, there are several wireless networks deployed around the world. Examples include cellular networks, metropolitan area networks and wireless local area networks. Given the heterogeneity of the existing network technologies, the diversity of mobile applications, and user requirements, ensuring service continuity for a mobile user when changing different access network becomes a mandatory aspect...
The Ultra Flat Architecture is a new concept of fixed-mobile convergent networks that aims to scale well with the mobile Internet traffic explosion prognosticated for the next 5-10 years. This paper presents a new delegation-based UFA signaling framework using HIP, IEEE 802.21 and the context transfer protocol. The main procedures contributed by this signaling framework are terminal attachment, session...
In this paper, mobile multicast mechanism based on IEEE 802.21 MIH (Media Independent Handover) for efficient network resource usage is proposed. Proposed mechanism supports the efficiency of network resource usage and fast multicast handover. The proposed architecture adopts multicast manager concept to MIH framework in order to efficiently perform mobile multicast handover, and adds the new MIH...
In this paper fast mobile multicast mechanism based on IEEE 802.21 MIH (Media Independent Handover) is proposed. We solve long multicast handover delay time caused by L3 movement detection mechanism of the existing mobile multicast methods. The proposed architecture adopts multicast manager concept to MIH framework in order to efficiently perform mobile multicast handover, and adds the new MIH messages...
Multiple heterogeneous access technologies will be intergraded in the next generation wireless system in which the seamless migration of ongoing data-flows from one access point to another is one of the fundamental issues. In this paper, an IEEE 802.21 Media Independent Handover (MIH) based handover management architecture containing four modules is proposed and the multihoming technology is adopted...
Seamless vertical handover is a key requirement in heterogeneous wireless networks where different networks are integrated. In this paper, we introduce an enhanced information server (EIS) in the IEEE 802.21 media independent handover (MIH) architecture. We also propose an improved vertical handover procedure in which the wireless channel condition is estimated by exploiting spatial and temporal locality...
Since the future wireless communication environments will contain various wireless access technologies, the provision of seamless mobility to vehicle across these heterogeneous networks is needed. In this paper, we propose an application-driven vertical handoff scheme which includes PMIPv6 handoff process by using IEEE 802.21 media independent handoff (MIH) services to provide seamless connectivity...
Despite the interest, the utilization of today's networking environment including a variety of access technologies and various services and capabilities is still minimal. Multiaccess mobile devices already on the market provide a capability to hand over the heterogeneous networks but so far there has not been any commonly approved way to efficiently capitalize on this feature. Media Independent Handover...
We explore the use of the Media Independent Information Service (MIIS) in the IEEE 802.21 Media Independent Handover (MIH) framework to improve handover performance for Fast Mobile IPv6 by providing Authentication information. We explore the tradeoffs of Pre-Authentication before joining a new network versus authentication after connecting to a new network during a Fast Mobile IPv6 handover. We discuss...
Providing users of multi-interface devices the ability to roam between different access networks is becoming a key requirement for service providers. The availability of multiple mobile broadband access technologies together with increasing use of real time multimedia applications is creating strong demand for handover solutions that can seamlessly and securely transfer user sessions across different...
In recent years, various wireless access technologies have continuously grown as well as user demands have. However, such user demands have not been satisfied by each wireless access technology alone. Therefore, the Future Generation Networks (FGNs) are proposed to integrate various heterogeneous access technologies in order to support both vertical and seamless handovers. Especially, the IEEE 802...
Integration of heterogeneous networks is one of the important characters of next-generation networks. As different access technologies may offer different attributes, it becomes a very important and challenging issue to ensure users access the most suitable network at any time, and make seamless handover while moving between different heterogeneous networks. In this paper propose an intelligent seamless...
Low handover delay ensures seamless mobility of active communication flows across heterogeneous wireless networks. Handover delay resulting from host-based localized mobility management procedures remains high and unacceptable for real time applications. This paper, therefore, proposes an IEEE 802.21 assisted network-based localized mobility management framework to further reduce handover delay by...
The seamless handover is the key technology to support mobility of the standard IEEE802.16e which brings WMAN to a new level due to the support of mobility. Existing version of standard proposes OFDM (A)-based handover process system, which consists of network topology acquisition, scanning, initial ranging, authorization, and registration. But they are limited to MAC Layer. In this paper, based on...
Seamless vertical handover is in great focus in contemporary world of research. Multi-interfaced mobile devices are introduced in the market to enable heterogeneous access. The main problem is how to efficiently use these multi-interfaced devices to achieve best data throughput, reduced packet loss and optimized handover. In this paper, the advantages of multihoming approach have been combined with...
The support of ad-hoc networks as extension of infrastructure operator networks is increasing its strength in next generation networks, due to the increasing requirement for ubiquitous access of the users. This paper describes the ad-hoc network integration mobility architecture being developed inside the IST project Daidalos II. The main purpose of this architecture is to seamlessly support the movement...
Constant development of wireless and mobile networks and their capabilities enlarges the plethora of possible user services. It opens potentials for the operators to increase their service portfolio and for the users to experience context-rich and personalized services. In this manner, the interoperability between different wireless networks and the enabling of seamless vertical handovers (VHOs) become...
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