Download Information Networking: International Conference, ICOIN by Sayed Vahid Azhari, Nasser Yazdani, Ali Mohammad Zareh PDF

By Sayed Vahid Azhari, Nasser Yazdani, Ali Mohammad Zareh Bidoki (auth.), Hyun-Kook Kahng (eds.)

This booklet constitutes the completely refereed post-proceedings of the overseas convention on details Networking, ICOIN 2003, held at Cheju Island, Korea in February 2003.

The a hundred revised complete papers provided have been rigorously chosen in the course of rounds of reviewing and revision. The papers are equipped in topical sections on high-speed community applied sciences, greater net protocols, QoS within the net, cellular net, community safeguard, community administration, and community performance.

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Extra info for Information Networking: International Conference, ICOIN 2003, Cheju Island, Korea, February 12-14, 2003.Revised Selected Papers

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Because of the long settling time relative to the very short rise with very small damping ratio, the TCP flows show severely oscillating dynamics. Therefore, a well designed AQM controller should be able to compensate the oscillatory TCP dynamics and give satisfactory control performance. 2 RED and PI-controller With RED [1], a link maintains the EWMA queue length, Qavg = (1 − wQ ) ∗ Qavg + wQ ∗ Q, where Q is the current queue length and wQ is a weight parameter, 0 ≤ wQ ≤ 1. When Qavg is less than the minimum threshold (minth ), no packets are dropped.

5), we are dealing with a cyclic type multi-queue system with the limited service discipline [3], which is interrupted by a high priority queue (Q6). In general, there is not any solution for multi-queue systems under limited service discipline and only some complex algorithms are proposed (such as algorithm which is proposed by Tedijianto in [5]). In this article, in order to calculate the mean waiting time for Q1 to Q5, we use a model called ”Vacation model”. A vacation model is composed of a single queue and a single server.

Particularly, once the sampling frequency (fs = 1/Ts ) is decided analytically or empirically, the digitized PID control equation is obtained using Tustin’s method 30 Seungwan Ryu and Christopher Rump for integration and the backward rectangle method for differentiation [10]. The packet drop probability at time k = t/Ts = 0, 1, . . is pk = pk−1 + ∆pk = pk−1 + a1 ek − b1 ek−1 + c1 ek−2 , where a1 = KP + Qk − Qref . 2 KD Ts + Ts 2TI , b1 = KP + 2KD Ts − Ts 2TI , c1 = (10) KD Ts and ek = Tuning of PID Control Parameters Although we can explore the key factor governing the TCP/AQM dynamics through simplified theoretical analysis, this simplification may introduce substantial error [14].

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