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Register a new userDesigning and Testing mathematical models for real access network used in new XDSL Techniques
تصميم و اختبار نماذج رياضية لشبكات النفاذ الحقيقية المستخدمة في تقنيات XDSL الحديثة
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يهدف البحث إلى دراسة تأثيرات نقاط الضعف في أداء الشبكة الحالية كتأثير التخامد و التسامع في نقل البيانات. كما يستعرض أيضاً تحسين معايير تقانات خط المشترك الرقمي لتحقيق أقصى معدلات الانتقال ليحقق سرعة أكبر في تركيب خطوط المشتركين عالية السرعة، و يقدم نطاقا" جديدا" من الخدمات لشركات الاتصال من خلال تقديم خط المشترك الرقمي بتقنياته الجديدة في المستقبل القريب، و بالتالي تمكين عملائها من إمكانية الوصول إلى خدمات النطاق العريض و تقديم نصائح للشركة السورية للاتصالات في اختيار الأنظمة و تجاورها مع بعضها بعضا. يحلل هذا البحث جوهر التقنيات و نقاط القوة و الضعف لمعايير خط المشترك الرقمي ذو النمط الرقمي الكامل المذكور في الملحق A و خط المشترك الرقمي العامل بنطاق صاعد ممتد المذكور في الملحق M، و كذلك الأمر يتضمن تحليلاً للتخامد و التسامع لتبين كيف يتم اعتبار أي من الـمعايير هو الخيار الأفضل بينها. و يتضمن البحث أخيراً تمثيلاً برمجياً للإشارة المرسلة عبر خطوط النقل تحت تأثير العوامل المدروسة.
This research aims to study the effects of weaknesses on the performance of the existing network such as the impact of Attenuation and crosstalk on the data transfer, and it presents also the improvements of the standards of DSL systems to achieve the maximum transition rates in order to have greater speed in the installation of high-speed subscriber lines. It also offers a new range of services to communication companies through the provision of new xDSL technologies in the near future. Thus, it enables its customers access to broadband services and provides tips for the Syrian Telecommunications Company in their choice of systems. This research analyses the essence of the techniques and the strengths and weaknesses of the criteria for All Digital Mode digital subscriber line mentioned in Annex A and for higher upstream digital subscriber line mentioned in Annex M. It also includes an analytical study of the damping and crosstalk to show how to consider any criteria as a better choice. Finally, It includes programmatically represented simulation of the signal which is sent over transmission lines under the influence of the studied factors.
References used
ITU-T G.996.1 Test procedures for digital subscriber line (DSL) transceivers. 6/1999
ITU-T G.992.1 Asymmetric digital subscriber line (ADSL) transceivers. 6/1999
(ITU-T G.992.3 Asymmetric digital subscriber line transceivers 2 (ADSL2)( 04/2009
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