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—Individual wireless access networks show limitations that can be overcome through the integration of different technologies into a unified platform [i.e., fourth–generation (4G) system]. Nevertheless, the integration of heterogeneous networks poses many challenges such as adding complexity to the processes of deciding when to handoff, selecting the best(More)
Networked Surfaces are surfaces which provide network connectivity to specially augmented objects, when these objects are physically placed on top of the surface. When an object (e.g. a notebook computer) connects, a handshaking protocol assigns functions such as data or power transmission to the various conducting paths that are established. This paper(More)
Teleporting is the ability to redirect a windowing environment to diierent computer displays. This paper describes the implementation of a teleporting system developed at Olivetti Research Laboratory (ORL). We outline two particular features of the system that make it powerful. First, it operates with existing applications, which will run without any(More)
  • John Matthew, Simon Doar, St John 's College, My Supervisor, Ian Leslie, Noha Adly +19 others
  • 1993
In future multimedia communication networks, the ability to multicast information will be useful for many new and existing services. This dissertation considers the design of multicast switches for Asynchronous Transfer Mode (ATM) networks and proposes one design based upon a slotted ring. Analysis and simulation studies of this design are presented and(More)
In the near future mobile devices with several interfaces will become commonplace. Most of the peripheral networks using the Internet will therefore employ wireless technology. To provide support for these devices, this paper proposes a new framework which encompasses the functions of both peripheral and core networks. The framework is called Y-Comm and is(More)
Experimental activities play a vital role in the deployment and development of novel radio access networks. In particular the movement from 3G to 4G poses new challenges , which need to be solved using practical approaches such as testbeds. This paper presents a testbed that can be regarded as an early attempt to build a 4G system. It fully integrates(More)
The growth over the last decade in the use of wireless networking devices has been explosive. Soon many devices will have multiple network interfaces, each with very different characteristics. We believe that a framework that encapsulates the key challenges of heterogeneous networking is required. Like a map clearly helps one to plan a journey, a framework(More)
— Several research groups are working on designing new security architectures for 4G networks such as Hokey and Y-Comm. Since designing an efficient security module requires a clear identification of potential threats, this paper attempts to outline the security challenges in 4G networks. A good way to achieve this is by investigating the possibility of(More)
The integration of heterogeneous wireless networks is one of the most important features that are needed for the future deployment of new wireless technologies such as 4G mobile systems. However, the designers of these systems are also committed to using Internet Protocol (IP) as their core network infrastructure. Thus, support for vertical handover,(More)