By Miroslav Voznak, Lukas Kapicak, Martin Mikulec, Pavel Nevlud (auth.), Andrzej Kwiecień, Piotr Gaj, Piotr Stera (eds.)

ISBN-10: 3642312160

ISBN-13: 9783642312168

ISBN-10: 3642312179

ISBN-13: 9783642312175

This booklet constitutes the refereed lawsuits of the nineteenth foreign convention on desktop Networks, CN 2012, held in Szczyrk, Poland, in June 2012. The forty eight revised complete papers provided have been rigorously reviewed and chosen for inclusion within the e-book. The papers deal with topics reminiscent of new and rising applied sciences concerning networking fields; basics of machine networks; net and internetworking; safety and security concerns; commercial computing device networks; instant structures and sensor networks; the speculation of queues and queuing networks; purposes and desktop networks usage.

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Extra resources for Computer Networks: 19th International Conference, CN 2012, Szczyrk, Poland, June 19-23, 2012. Proceedings

Example text

M,n,s amnsl xmns ymns [t]. Update congestion signals λl [t + 1] according to (7). Send congestion signals to all users transmitting data through the link l. Increase t. Go to 2. Decentralized Data Placement Algorithm. Observe that the linear program (8) is equivalent to N linear programs for each n = 1, . . , N , thus without the loss of generality one can assume that n is fixed and solve for each n independently. ,S x0ns = 0 ∨ ψmns = τ 0ns m=1 which suggests the following procedure. Starting from φ = 0, ψ = 0, for each user m increase the dual variable φmn until the “connection cost” to any server s is paid (this cost equals to τ mns ).

Go to 2. Algorithm 2. Link algorithm for upper level subproblem The procedure below is executed in link l (routers’ software): 1. 2. 3. 4. 5. Let t = 0. e. m,n,s amnsl xmns ymns [t]. Update congestion signals λl [t + 1] according to (7). Send congestion signals to all users transmitting data through the link l. Increase t. Go to 2. Decentralized Data Placement Algorithm. Observe that the linear program (8) is equivalent to N linear programs for each n = 1, . . , N , thus without the loss of generality one can assume that n is fixed and solve for each n independently.

TCP Reno 500 0 0 100 200 300 Time (s) 400 (b) Friendliness vs. TCP CUBIC Fig. 12. TCP Illinois 500 22 C. Callegari et al. 100 120 main background 90 Throughput (Mbits/s) 80 Throughput (Mbits/s) main background 100 70 60 50 40 30 20 80 60 40 20 10 0 0 100 200 300 Time (s) 400 (a) Friendliness vs. TCP Reno 500 0 0 100 200 300 Time (s) 400 500 (b) Friendliness vs. TCP CUBIC Fig. 13. TCP YeAH 4 Conclusions The TCP is for sure the most used transport layer protocol in the Internet. In the years several variants have been proposed to overcome the limitations that the standard TCP has in particular scenarios, such as wireless networks or satellite networks.

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Computer Networks: 19th International Conference, CN 2012, Szczyrk, Poland, June 19-23, 2012. Proceedings by Miroslav Voznak, Lukas Kapicak, Martin Mikulec, Pavel Nevlud (auth.), Andrzej Kwiecień, Piotr Gaj, Piotr Stera (eds.)


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