Partenaires et organisations internationales
(Anglais)
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Nokia Mobile Phones, Tampere University of Technology, Technical Research Centre of Finland, Ascom Systec AG, ETH Zürich, Lucent Technologies WCND, University of Lancaster, Robert Bosch GmbH, University of Ulm, Compagnie IBM France, IBM Corporate Research Division Zürich, Intracom Hellenic Telecommunications, University of Athens, Eurecom Institute
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Résumé des résultats (Abstract)
(Anglais)
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The three main objectives of the Magic WAND project have been:
(1) to specify a wireless, customer premises, access system for ATM networks that maintains the service characteristics and benefits of the ATM networks to the mobile user;
(2) to promote the standardisation, notably in ETSI, of wireless ATM access as developed in this project; and
(3) to demonstrate and carry out user trials with a selected user group and test the feasibility of a radio-based ATM access system.
The Magic WAND project covers the whole range of functionality from basic (wireless) data transmission to shared multimedia applications. The project has shown that wireless access to ATM, capable of providing real multimedia services to mobile users, is feasible. The project partners have chosen to use the 5 GHz frequency band for the demonstrator and also to perform studies on higher bit rate operation (>50 Mb/s) in the 17 GHz frequency band. The Magic WAND project has had a major impact on standardisation efforts within ETSI, IEEE 802.11 and the ATM Forum.
User trials have taken place in 1998, with selected end-user groups in hospital (medical consultation) and office (mobile computing) environments. The medical consultation is an advanced scenario, fully exploiting the wireless ATM service capabilities in a hospital environment. The JVTOS (Joint Video Telecommunication Operating System) is used with an X-ray viewing application, using both native audio and video services over ATM. With the help of wireless ATM connections doctors have been able to retrieve patient information from the network, consult experts via video-conferencing and work on the same documents simultaneously from different locations.
The mobile computing trial demonstrates legacy applications built on top of the TCP/IP protocol stack, such as Internet Web-browsers, over the wireless ATM link. University students formed the user group.
As well as being used in the trials, the system has been publicly demonstrated at the 3rd ACTS Mobile Communications Summit in Greece in June 1998 and the MoMuC Workshop on Wireless Broadband Testbeds in Berlin in October 1998.
In 1998 the work of Ascom Systec within the Magic WAND project has been concentrated in two areas. Firstly, a version of the demonstration system has been integrated and installed at Ascom's premises in Mägenwil.
Secondly, Ascom Systec has made a study of the potential for outdoor, medium range use of the WAND system, for broadband local loop and inter-building connection applications. Both point-to-point and point-to-multipoint configurations have been considered. The work has consisted of a detailed theoretical study of the necessary antenna systems, the impact on system performance of longer round-trip delay times, and so on, and of a campaign of radio propagation measurements.
The propagation measurements were conducted in Mägenwil and Zürich. Channel impulse responses and path losses were recorded, with several different antennas, for line-of-sight and near-line-of-sight paths between 1 and 5 kilometres. Extremely positive results were obtained, supporting the view that broadband wireless local loop systems are practical. These measurements should prove very valuable in the near future, as standards (N-WEST, HIPERACCESS) and then products in broadband wireless local loop are developed.
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