cq switch analysis under traffic overload

تحليل مبدل CQ في ظل الحمل الزائد لحركة المرور

Clicks: 174
ID: 147761
2011
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Abstract
An analysis of 2x2 crossbar packet switch with buffers at crosspoints and round robin scheduling algorithm is presented in this paper. The analysis is performed for a non-admissible traffic pattern, where output ports are overloaded. The case of full offered load is observed and output ports are loaded with packets that have different arrival probabilities. In addition to the parameters that are commonly observed in such an analysis (throughput and average packet delay), memory requirements for the implementation of the buffer, as well as fair representation when servicing the buffer - the so-called fairness are also analyzed. The results show that even for a switch with a small number of ports very large buffers should be implemented, if we want to achieve satisfactory performance under traffic overload.
تُقدّم هذه الورقة البحثية تحليلاً لمبدّل حزم تقاطعي (2×2) مزوّد بمخازن مؤقتة عند نقاط التقاطع ويعتمد خوارزمية الجدولة الدائرية (Round-Robin). وقد أُجري التحليل لنمط حركة مرور غير مقبولة (non-admissible)، حيث تتعرض منافذ الإخراج لحمل مفرط. كما رُصدت حالة الحمل المعروض الكامل، مع تحميل منافذ الإخراج بحزم ذات احتمالات وصول مختلفة. وبالإضافة إلى المعايير التي تُدرس عادةً في مثل هذا التحليل (الإنتاجية ومتوسط تأخير الحزم)، حلّلت الدراسة متطلبات الذاكرة لتنفيذ المخزن المؤقت، فضلاً عن التمثيل العادل عند خدمة المخزن المؤقت—أي ما يُعرف بالإنصاف (fairness). وتُظهر النتائج أنه حتى بالنسبة لمبدّل يمتلك عدداً صغيراً من المنافذ، يجب استخدام مخازن مؤقتة كبيرة جداً إذا ما أردنا تحقيق أداء مُرْضٍ في ظل الحمل المروري الزائد.
Reference Key
maljevi2011telforcq Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;I. Maljević;I. Radusinović;M. Radonjić;D. Banović
Journal surface science
Year 2011
DOI
DOI not found
URL
http://journal.telfor.rs/Published/Vol3No1/Vol3No1_A4.pdf
Keywords
fairness throughputtelecommunication

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