| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 60-70 |
| Abstraksi Narasi | : | This article presents the conclusions of research undertaken in the Mobile Communications Group, University of Surrey, during the last tree years in the area of wireless/mobile ATM. This research was funded by the United Kingdom DTI-EPSRC project, `Personal Communications LINK Project` (PCP) under the title `Wireless ATM LAN,` and carried out in collaboration with Symbionics Developments Ltd. of the United Kingdom. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 42-50 |
| Abstraksi Narasi | : | The medium access control (MAC) protocol and the underlying traffic scheduling algorithm developed within project Magic WAND (Wireless ATM Network Demonstrator) are presented. Magic WAND is investigating wireless ATM technology for customer premises networks in the framework of the Advanced Communications Technologies and Services (ACTS) program funded by the European Union. The MAC protocol, known as MASCARA, is a hub-based, adaptive TDMA scheme which combines reservation- and contentions sharing a common radio channel. The traffic scheduling algorithm is delay-oriented to meet the requirements of the various traffic classes defined by the ATM architecture. The results of the simulation of a number of scenarions are presented to access the performance of the proposed algorithm. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 82-92 |
| Abstraksi Narasi | : | As broadband multimedia services and wireless services become popular, there is growing interest in the industry to support ATM over a wireless link, and wireless access to fixed ATM networks. In this article we focus on the internetworking of PCS and ATM networks, in which the air interface remains one of the PCS standards and the backbone is an ATM network with mobility support. It is desirable to minimize the impact of the internetworking and mobility support on the existing/emerging PCS and ATM specifications. A network architecture, a protocol reference model, and signaling protocols for PCS mobility support over fixed ATM networks are described in this article. They are compared against other implementation alternatives and the trade-offs are discussed. Some performance results of the proposed architecture are also presented. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 93-99 |
| Abstraksi Narasi | : | The concept of wireless ATM is now being actively considered as a potential framework for next-generation wireless communication networks capable of supporting integrated multimedia services with different QoS requirements. Several key subsystem design issues for wired ATM and wireless networks need to be readdressed in the scope of the wireless ATM. One of the main key subsystem issues is the development of the appropriate medium access control (MAC) protocol, which has the capability to extend the statistical multiplexing of the wired ATM network into the wireless medium. In this article the authors address the problem of the suitable MAC protocol for the specification of a wireless ATM network and outline the design objectives. In addition, the authors address some other challenging key issues that the wireless medium and wireless network architecture impose on the ATM stack protocol. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 100-109 |
| Abstraksi Narasi | : | Mobile ATM offers a common wired network infrastructure to support mobility of wireless terminals, independent of the wireless access protocol. In addition, it allows seamless migration to future wireless broadband services, such as wireless ATM, by enabling mobility of end-to-end ATM connections. In spite of the diversity in mobile networking technologies (e.g., cellular telephony, mobile-IP, packet data services, PCS), all of them require two fundamental mecanisms: location management and handoff. This article describes different schemes for augmenting a wired ATM network to support location management of mobile terminals and handoff protocols for rerouting a connection data path when the endopoint moves. A prototype implementation of mobile ATM integrating mobility support with ATM signaling and connection setup, is presented. It shows how mobile ATM may be used to provide mobility support to an IP terminal using non-ATM wireless access. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 72-81 |
| Abstraksi Narasi | : | This article presents a framework for multimedia networking in a wireless and mobile environment. We consider both multimedia application needs as well as networking requirements, and try to bridge these paradigms using an adaptive framework. Central to this framework is the concept of representing connection in terms of multiple substreams each with their own specified QoS requirement and making network elements (switching and access points), services, and protocols (signaling, control, routing) aware of the QoS requirements of such substreams. As resource availability in the wireless and mobile network fluctuates, the network selects and schedules substreams in order to present the information content with an acceptable quality at a receiver (or each receiver in case of multicast connections). This is done while achieving a reasonable utilization efficiency of network resources and sharing them in a fair manner. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 110-113 |
| Abstraksi Narasi | : | The availability of a large of unlicensed spectrum, an approach to dealing with performance issues, and emerging protocol standards for wireless asynchronous transfer mode make it worthwhile to take a closer lokk at distributed channel access techniques. Given the framework of spectrum characteristics and the need to support multiple devices and services, criteria for evaluating new distributed channel access techniques are described. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 52-59 |
| Abstraksi Narasi | : | With the prospect of commercializing wireless ATM networks fast becoming a reality, and ATM connnection management solutions has to take into consideration these recent developments. Unfortunately, current ATMsignaling solutions standardized by the ATM Forum have to be modified extensively in order to support wireless ATM. Furthermore, these solutions have not delivered a suitable multicast service which can support the communication requirements found in today`s computer-based multimedia applications. The work described here therefore addresses these shortcomings by proposing a new multicast connection service architecture and its related algorithms. Some of the important concepts elaborated in the design include the notion of open signaling, the use of logical multicast groups to handle all connections, and seamless support for host mobility. |
| Nama Pengarang | : | Giovanni Cherubini et al, Lek-Heng Ngoh, Hongyi Li, Weiguo Wang, Lou Dellaverson, Wendy Dellaverson, Mahmoud Naghshineh, Marc Willebeek-LeMair, Arup Acharya et al, Osama Kubbar, Hussein T. Mouftah, Matthew Cheng et al, Nikos Passas et al, Georgios Sfikas, Costas Apostolas, Rahim Tafazolli, Pahlavan, Kaveh , Ali Zahedi, Prashant Krishnamurthy |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 115-122 |
| Abstraksi Narasi | : | 100BASE-T2 is a new physical-layer specification for IEEE 802.3 LANs operating at 100Mb/s (`Fast Ethernet`). It enables users of the prevailing 10BASE-T Ethernet LAN technology to upgrade their networks form 10 to 100 Mb/s performance while retaining an existing voice-grade cabling infrastructure. 100BASE-T2 transceivers will operate over two pairs in unshielded twisted-pair cables corresponding to EIA/TIA category 3 (UTP-3), as minimally required for 10BASE-T. In a four-pair UTP-3 cable, simultaneous operation of two 100BASE-T2 links, or one 100BASE-T2 and one 10BASE-T link, is permitted. Since voice-grade cables exhibit more signal attenuation and significantly higher crosstalk coupling between adjacent pairs than data-grade cables, sophisticated digital signal processing techniques are needed to achieve reliable duplex 100 Mb/s transmission over two pairs. The 100BASE-T2 standard defines dual-duplex baseband transmission at a modulation rate of 25 Mbaud. During each modulation interval, a four-bi data nibble or Ethernet-specific control information is encoded into a pair of quinary filters are required for echo nd NEXT cancellation, equalization, and interference suppression. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 100-110 |
| Abstraksi Narasi | : | Intranets are composed of a network various devices, systems, and services supporting a wide variety of applications within an organization. Providing a secure, reliable, and efficient operating environment to support the organization`s daily activites and its business is the most challenging task faced by operations and management staff today. Current management practices typically involve the use of separate, incompatible tools and techniques for managing networks systems, and applications. What is needed desperately is a simple, uniform framework for managing not only networks but also systems and applications. Web-based management is a proamising approach that can provide a truly integrated management solution. This article exmines the key emerging technologies involved in Web-based management. The authors present an integrated architecture that can be used to manage all the networking and computing resources in an Intranet. Also presented are several specific examples where Web technology has been applied in managing different target resources for validating the architecture. |
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