دراسة مرجعية لشبكات الألياف الضوئية السلبية طويلة المدى بالتقسيم الموجي (WDM-PON) المسطحة والتحويل الضوئي لربط مراكز البيانات الوطنية

القسم: Review Article
إصدار
مجلد 35 عدد 4 (2026): Volume 35, Issue 4
سجل المقالة
استُلمت: 2026-03-12
عُدّلت: 2026-04-30
قُبلت: 2026-05-21
نُشرت: 2026-10-01
الصفحات
67-84

الملخص

تتطلب البنية التحتية الوطنية للألياف الضوئية تحديثاً مستمراً نظراً للطلب المتزايد على نقل البيانات بين مراكز البيانات والمستخدمين النهائيين، والذي أدى إلى حدوث اختناقات وتأخيرات. تقدم هذه الورقة مراجعة منهجية لمعماريات شبكات الألياف الضوئية السلبية طويلة المدى بالتقسيم الموجي (LR WDM-PON) المسطحة على المستوى الوطني. يتم دمج هذه المعماريات مع تقنيات التبديل (التحويل) الضوئي لربط مراكز البيانات الموزعة (DCI) بهدف تعزيز أداء الشبكات الضوئية.تحلل الدراسة تطور شبكات WDM-PON نحو عمليات الوصول الممتد (المدى الطويل)، وتسلط الضوء على دور المُجَمِّعات الضوئية للإضافة والإسقاط (OADMs) في التوجيه على مستوى الطول الموجي. بالإضافة إلى ذلك، نناقش التحديات الرئيسية التي تحد من الإرسال الضوئي، مثل تراكم التشتت اللوني، والتأثيرات غير الخطية، وتدهور نسبة الإشارة الضوئية إلى الضوضاء (OSNR) الناتج عن التكبير المتسلسل للمقويات.يُعطى اهتمام خاص لاستراتيجيات تعويض التشتت، مثل استخدام ألياف تعويض التشتت (DCF)، وتأثيرها على أداء معدل خطأ البت (BER) في سيناريوهات الوصول الممتد. تجمع هذه المراجعة بين الدراسات التجريبية والنظرية الحديثة لشرح أطر التصميم الأساسية والقيود الفيزيائية المرتبطة بتوسيع نطاق الشبكات الضوئية الشفافة لتغطي المستوى الوطني.

الكلمات المفتاحية:

Optical Switching، Long-Reach WDM-PON، Data Center Interconnects (DCI)، National Fiber Backbone، Transmission Impairments

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المؤلفون

Farhad Salih Ahmed

Department of Computer Science, College of Computer Science and Information Technology, University of Kirkuk, Kirkuk, Iraq

المعرفات

معرف الكائن الرقمي DOI: 10.33899/jes.v35i4.62043

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[1]
"دراسة مرجعية لشبكات الألياف الضوئية السلبية طويلة المدى بالتقسيم الموجي (WDM-PON) المسطحة والتحويل الضوئي لربط مراكز البيانات الوطنية", JES, م 35, عدد 4, ص 67–84, أكتوبر 2026, doi: 10.33899/jes.v35i4.62043.
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