Alexander G. Fraser. Designing a public data network. IEEE Communications Magazine, 30(10):31--35, October 1991.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....by technological advances in the last decade. The speed and capacity of various components in a communication system, such as transmission media, switches, memory, processors, have all followed technological curves that have grown either linearly or exponentially over the last ten years [34]. At the periphery of the network, driven by the same underlying technology microelectronics, the capability of computers has been drastically increased while the cost has been significantly reduced. To take advantage of the technological trends, and to satisfy the growing need for people and ....

Alexander G. Fraser. Designing a public data network. IEEE Communications Magazine, 30(10):31--35, October 1991.

....the throughput of NP with pre encoding is higher than for N2 and NP without pre encoding. While these results indicate that software coding decoding is fast enough today, this will be even more the case in the future, since processing rates tend to increase faster than transmission bandwidth [Fra91] 6 Summary Using FEC in an integrated fashion provides five major benefits: ffl Integrated FEC shifts resource usage from the network to the endsystems: The number of transmissions is reduced and therefore the network bandwidth used as well at the cost of coding at the endsystems. ffl The ....

A. G. Fraser. Designing a public data network. Communications, 29(10):31--35, October 1991.

....of over 750 per year. At the time of the article, WWW traffic was just shy of becoming the dominant traffic and shows no signs of slowing 3 down. Much of this traffic traverses wide area network backbone links which are relatively faster than typically available local network speeds. Fraser [Fraser 91] points out that as LAN bandwidth increases, backbone bandwidth increases too, continually outpacing LAN speeds. Currently most fast LANS are 10Mb s Ethernets and the NSFnet backbone consists of 45Mb s links. This environment of high bandwidth WANs with relatively lower bandwidth LANS is expected ....

Alexander G. Fraser. Designing a Public Data Network. IEEE Communications, October 1991, pp. 31-35.

....VCs with various speeds. Interleaving fast and slow cells in the MUXing points would prevent clustering of fast cells. This, in turn, will alleviate the need for buffering the fast cells in the DMUX network pints. One way to implement such interleaving would be a Weighted Fair Queueing (WFQ) [15], 16] 17] 18] 19] 20] of cells belonging to VCs of different bandwidths. 4 Simulation of FIFO and WFQ Schemes in a Network with Bursty Traffic We simulated a network node with ten sources shown in Figure 5. Each source generates bursty traffic, with a geometric distribution of active and ....

A. Fraser, "Designing a Public Data Network," IEEE Comm. Magazine, Oct. 1991, pp. 31--35.

....traffic was just shy of becoming the dominant traffic and shows no signs of slowing down. Usually the wide area network backbone links are relatively faster than generally available local network speeds. As LAN bandwidth increases, backbone bandwidth increases, continually outpacing LAN speeds as [Fraser 91] points out. Currently most fast LANS are 10Mb s ethernets and the NSFnet backbone consists of 45Mb s links. This environment of high bandwidth WANs with relatively lower bandwidth LANS is expected to continue as WAN speeds broach the Gb s barrier, on to Terabits and beyond. If the higher ....

Alexander G. Fraser. Designing a Public Data Network. IEEE Communications, October 1991, pp. 31-35.

....potential bottlenecks can lead to bottleneck migration, and large discrepancies in monitoring the bottleneck service rate. It is generally accepted that a switch should have at least a bandwidth delay product worth of buffers to be shared amongst the conversations sending data through that switch [4, 5]. Here, the minimum round trip propagation delay is 12 seconds, and the bottleneck bandwidth is 10 packets s. Thus, 120 switch buffers are provided, as 120 is the bandwidth delay product. Recall that in our simulations buffers are not reserved. Each Poisson source has an average interpacket ....

A. G. Fraser, Designing a Public Data Network, IEEE Communications Magazine, October 1991, 31-35.

....the throughput of NP with pre encoding is higher than for N2 and NP without pre encoding. While these results indicate that software coding decoding is fast enough today, this will be even more the case in the future, since processing rates tend to increase faster than transmission bandwidth [Fra91] 6 Summary Using FEC in an integrated fashion provides five major benefits: ffl Integrated FEC shifts resource usage from the network to the endsystems: The number of transmissions is reduced and therefore the network bandwidth used as well at the cost of coding at the endsystems. ffl The ....

A. G. Fraser. Designing a public data network. Communications, 29(10):31--35, October 1991.

....allocation of resources [20] It also automatically polices sources, since a source sending faster than its fair share is the one that will be subjected to packet or cell loss. This ensures that well behaved users are protected from ill behaved users, which is desirable in public data networks [18]. Due to these advantages, it is likely that round robin schedulers will be widely implemented. packet pair flow control is one way to exploit the properties of such schedulers to do intelligent flow control. 2 While packet pair strictly refers only to the technique for probing the ....

A. G. Fraser, Designing a Public Data Network, IEEE Communications Magazine, October 1991, 31-35.

....by technological advances in the last decade. The speed and capacity of various components in a communication system, such as transmission media, switches, memory, processors, have all followed technological curves that have grown either linearly or exponentially over the last ten years [18]. At the periphery of the network, driven by the same underlying technology microelectronics, the capability of computers has been drastically increased while the cost has been significantly reduced. The advent of high speed networking has introduced opportunities for new applications such as ....

A. Fraser. Designing a public data network. IEEE Communications Magazine, 30(10):31--35, October 1991.

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