By Joseph Y. Hui
ISBN-10: 1461364361
ISBN-13: 9781461364368
ISBN-10: 1461532647
ISBN-13: 9781461532644
The fast improvement of optical fiber transmission know-how has created the prospect for developing electronic networks which are as ubiquitous because the present voice community yet which may hold video, voice, and information in monstrous qlJantities. How and while such networks will evolve, who can pay for them, and what new purposes will use them is anyone's wager. There seems to be without doubt, besides the fact that, that the fashion in telecommunication networks is towards a long way better transmission speeds and towards higher heterogeneity within the necessities of alternative functions. This ebook treats a number of the valuable difficulties focused on those networks of the long run. First, how does one change facts at speeds orders of significance quicker than that of present networks? This challenge has roots in either classical switching for telephony and in switching for packet networks. there are many new twists right here, despite the fact that. the 1st is that the excessive speeds necessitate using hugely parallel processing and position a excessive top rate on computational simplicity. the second one is that the mandatory facts speeds and allowable delays of other purposes fluctuate by means of many orders of value. The 3rd is that it would be fascinating to aid either aspect to indicate functions and in addition functions concerning broadcast from one resource to a wide set of destinations.
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Additional resources for Switching and Traffic Theory for Integrated Broadband Networks
Sample text
The choice of frame structure is difficult since we have little knowledge of the traffic mix. An alternative approach abandons the concept of a frame reference altogether. Instead of choosing a basic terminal bit-rate as in multi-slot TDM, ATM achieves more flexible bandwidth sharing by allowing the terminals to seize bandwidth when a sufficient number of bits are generated. Without a frame reference, these bits have no implicit ownership, unlike STM for which each slot is assigned an owner. Hence a key feature of A TM is that information from each terminal must be labeled, as we shall explain later.
More succinct accounts of telephony and switching can be found in books by Bellamy, Hills, Joel, and McDonald. The book by Inose describes in detail various digital transmission and switching technologies and integrated networks. The excellent books by Bertsekas and Gallager as well as by Schwartz offer a modern 1001c of data networks. Various recent issues of the IEEE Journal on Selected Areas of Communications document the latest advances for research in broadband communications. 1. J. Bellamy, Digital Telephony, John Wiley and Sons, New York, 1982.
Instead of a fixed delay comparable with the frame duration for STM, ATM may suffer a random delay which depends on how many packets are contending per slot. 2. Variable Length Packets Instead of short fixed length packets, it is often convenient (particularly for data communications) to use long (say 128 bytes or more) variable length packets. Besides the label for ownership, the packet header should also contain the information for packet length to mark the end of the packet, as well as a flag to mark the beginning of the packet.
Switching and Traffic Theory for Integrated Broadband Networks by Joseph Y. Hui
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