FDDI: status and perspectives

Current high-speed communication networks exhibit gigabit bandwidths. Nevertheless, applications cannot take advantage of these advances due to host interface and machine and system architecture limitations. Today, the main concern is to reduce the protocol overheads imposed on data transfers, minimizing memory copies and implementing off-host communication functions.We propose a novel architecture for real-time distributed systems using a 155Mbit/s ATM network. The system is based on an intelligent communication interface board for PCs, which integrates a Transputer, an FPGA and a VRAM to implement flexible high level communication services. These services are multiple copy updates of distributed real-time data on monitoring machines, transfers of audio and video streams coming from several cameras.The main advantages of our architecture over traditional systems include the reduction of the multimedia load imposed on the host processor, the provision of an efficient real-time data service for applications, and the support of existing standard protocols such as TCP/IP for traditional data.The board is being developed and will soon be experimented on a platform with live applications. The interest of this work is reinforced by the fact that integration of a processor and FPGA on a single chip will be available in the near future.

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“…The simplest one is the dual ring, similar to FDDI [Dav94]. Obviously, the construction of more complex ones is possible.…”

Section: The Main Design Choicesmentioning

confidence: 99%

<title>PC/ATM interface accelerator using reconfigurable technology</title>

Guillaud¹,

Ouvradou

Laisne

et al. 1995

SPIE Proceedings

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“…It allows to build high speed networks that span up to 100 Km. The MAC of the FDDI is operated according to the so-called Timed Token Rotation (TTR) protocol [5,6]. During ring initialization process, a protocol parameter called Target Token Rotation Time (TTRT) is determined, which indicates the expected target token rotation time.…”

Section: Introductionmentioning

confidence: 99%

High Throughput of Asynchronous Traffic and Maximum Capacity of Synchronous Sources With the New Fddi's Mac Protocol

Khalil¹

2012

IJESET

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It is well known that Fiber Distributed Data Interface (FDDI) offers an excellent cost-benefit and guarantees a reliable and powerful network. It is also fact that the FDDI is suitable for synchronous traffic because of the high speed and the performance guarantees it provides. However, these guarantees are achieved at the expense of asynchronous traffic because the synchronous messages are given highest priority over asynchronous messages, resulting in excessive delays and low throughput for asynchronous message. This paper, presents a modification of the FDDI's MAC(Media Access Control) protocol to control the maximum token rotation time not to exceed the TTRT (Target Token Rotation Time) in the worst case, the realization of this condition leads to set the TTRT to the message generation period (Tg) instead of one half of it (Tg/2). The new protocol of FDDI's MAC increasing both the throughput of asynchronous traffic and the capacity of synchronous sources. The proposed MAC is evaluated by means of computer simulation. The simulation results confirm that the new proposed MAC provides FDDI more efficient for supporting multimedia applications.

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Literatur

Heinrichs¹

1996

Multimedia Im Netz

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FDDI: status and perspectives

Cited by 6 publications

References 21 publications

<title>PC/ATM interface accelerator using reconfigurable technology</title>

<title>PC/ATM interface accelerator using reconfigurable technology</title>

High Throughput of Asynchronous Traffic and Maximum Capacity of Synchronous Sources With the New Fddi's Mac Protocol

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