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Multimedia communications

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  • Electrical and electronic engineering [2]
  • Communications [2]
  • Information and communication theory [2]
  • Communication system theory [2]
  • Communication switching [2]
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A medium access control protocol for wireless ATM LAN based on polling
Author(s): F. Ayo, B. Jafarian, A.H. Aghvami
Source: IEE Colloquium on ATM Traffic in the Personal Mobile Communications Environment, 1997, p. 2 - 2
Type: ConferencePaper
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Activity continues in the investigation of indoor wireless networks based on ATM. These local area networks (LANs), are required to co-exist with future fibre-optic based broadband communications networks and users will expect similar service capabilities in the wireless environment as is offered in the wired networks. In dealing with the medium access challenge faced in the implementation of these networks, a modified polling (disposable token) protocol is proposed as another candidate multiple access scheme for an ATM based wireless LAN. Simulation results are presented for a voice/data scenario, and features of the scheme include time of expiry (TOE) based service discipline, with polling priority given to the time critical (multimedia) portion of the packet data. The priority scheme was found to achieve considerable improvement in system performance, measured in terms of call/message delay and loss. (6 pages)

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Performance of multiservice dynamic reservation (MDR) TDMA for multimedia wireless networks
Author(s): B. Jafarian, A.H. Aghvami, T.H. Le
Source: IEE Colloquium on Networking Aspects of Radio Communication Systems, 1996, p. 7 - 7
Type: ConferencePaper
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Personal communication network (PCN) technology has become the most important topic in next-generation telecommunication systems. It has been recognised that multimedia wireless networks have become a natural way of providing wireless extensions for future broadband networks. These networks, based on an ATM transport architecture, are going to support a mix of broadband ISDN services including constant bit rate (CBR), variable bit rate (VBR) and packet data. MDR-TDMA is one of the proposed protocols for the medium access control (MAC) sublayer of such a network. We analyze the performance of this protocol for a multimedia scenario. Simulation results of quality of service (QoS) and other parameters are presented for this system. (6 pages)

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