NDLI: Dynamic routing on networks with fixed-size buffers

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Dynamic routing on networks with fixed-size buffers

Content Provider	ACM Digital Library
Author	Rosén, Adi Kushilevitz, Eyal Aiello, William Ostrovsky, Rafail
Abstract	The combination of the buffer size of routers deployed in the Internet and the Internet traffic itself leads routinely to routers dropping packets. Motivated by this, we initiate the rigorous study of dynamic store-and-forward routing on arbitrary networks in a model in which dropped packets must explicitly be taken into account. To avoid the uncertainties of traffic modeling, we consider arbitrary traffic on the network. We analyze and compare the effectiveness of several greedy, on-line, local-control protocols using a competitive analysis of the throughput. One goal of our approach is for the competitive results to continue to hold as a network grows without requiring the memory in the nodes to increase with the size of the network. Thus, in our model, we have link buffers of fixed size, B, which is independent of the size of the network, and B becomes a parameter of the model.Our results are in contrast to another adversarial traffic model known as Adversarial Queuing Theory (AQT), which studies the stability and growth rate of queues as a function of the network and traffic parameters. For example, in AQT the Furthest-To-Go (FTG) protocol is stable for all networks whereas Nearest-To-Go (NTG) can be unstable for some networks. Unlike AQT, in our setting NTG is preferable to FTG: we show that the NTG protocol is throughput-competitive on all networks whereas the FTG protocol has unbounded competitiveness whenever a network contains even small cycles.
Starting Page	771
Ending Page	780
Page Count	10
File Format	PDF
ISBN	0898715385
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2003-01-12
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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