By Per Gunningberg, Jochen Schiller (auth.), Andre Danthine, Otto Spaniol, Wolfgang Effelsberg, Domenico Ferrari (eds.)
High-Performance Networks for Multimedia Applications provides the newest study at the prone and protocols for networks offering the verbal exchange help for allotted multimedia functions.
the necessity for end-to-end QoS for those multimedia functions is elevating the stakes for a strong shaping and scheduling within the community adapter. it's also making a want for brand spanking new providers on the ATM layer, CBR and VBR being augmented by way of UBR, ABR and GFR that have to be evaluated within the TCP/IP atmosphere of this present day and day after today.
With the strain of the entire new applied sciences on hand this present day, the spine structure has to be revisited and the good fortune of the TCP/IP must never put off the potential of including a local ATM entry to it.
many of the learn in conversation companies akin to IntServ, DiffServ and local ATM is pushed through the necessities of multimedia structures and this e-book illustrates the recent emphasis through bringing telecommunication and computing device communique specialists including software designers. this is often relatively real for the protection concerns additionally addressed the following.
final yet no longer least, modeling ideas and mathematical versions are necessary to determine the functionality of the networks to be equipped and to judge subsequent century situations unachievable by way of an easy scaling of state-of-the-art strategies.
High-Performance Networks for Multimedia Applications is a set of top of the range learn papers and the in-depth therapy of the themes presents attention-grabbing and leading edge suggestions. it really is a necessary reference for telecommunication and computing device specialists and QoS-based program designers. it's also a accomplished textual content for graduate scholars in high-perforrnance networks and multimedia applications.
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Extra resources for High-Performance Networks for Multimedia Applications
A Simulation study of TCP with the GFR service category 43 Privileged source + Mean for each background source x Weighted fair throughput for privileged source ....... Weighted fa" throughput for each background source ................ _. • .. •... -- .......... 1e+08 .... ~. ~ . . x ......... _.... ~........ _.... x .... OL---------~----------~----------~----------~ o Figure 17 50000 100000 150000 MeR lor privileged source Icelis/secJ TC P throughput with L 200000 MC Rbackgrotlnd = 9 * 5000 cells/sec With a 9140 bytes MSS, a 64 KBytes window and TCPSACK, the privileged source had a lot of difficulties to efficiently use its reserved throughput (figure 18).
With the GFR service category, the endsystem is allowed to transmit either CLP=O AAL5-PDUs3 or CLP=1 AAL5-PDUs. The CLP=1 AAL5-PDUs are considered as low priority AAL5-PDUs which should be transmitted by the network on a best-effort basis. The minimum guaranteed bandwidth is not applicable for CLP=l AAL5-PDUs and these AAL5-PDUs should be discarded earlier than the CLP=O AAL5-PDUs when congestion occurs. The endsystems request a minimum guaranteed bandwidth by specifying a non-zero MCR and an associated MBS.
5 3 4 TCPdeJault: sample congestion window trace These expirations of the retransmission timer were of course caused by packet losses in the bottleneck switch. With the FIFO-based switcil implementation, CLP=1 AAL5-PDUs are discarded when the size of the output buffer of the bottleneck switch is larger than the LBO threshold, and CLP=O+ 1 AAL5PDUs are discarded when the size of the output buffer of the bottleneck switch is larger than the HBO threshold. A look at the simulation traces revealed that the output buffer of the bottleneck switch did not reach the HBO threshold, and that only CLP=1 AAL5-PDUs were discarded at the bottleneck switch.
High-Performance Networks for Multimedia Applications by Per Gunningberg, Jochen Schiller (auth.), Andre Danthine, Otto Spaniol, Wolfgang Effelsberg, Domenico Ferrari (eds.)