PHD theses : Engineering
Permanent URI for this collectionhttps://repository.neelain.edu.sd/handle/123456789/507
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Item Performance Improvements of the UMTS Systems for Messages Transfer(Al-Neelain University, 2016-05) Tarig Shawgi AbdelrahmanABSTRACT The main target of this study is to increase throughput of the subscribers messages received at the base station. Two channels were used for messages transfer after distribution of network offered load between them, they are random access channel and dedicated channel. Two algorithms were designed to calculate messages throughput at the base station for messages transmission over random access channel or dedicated channel individually, the proposed model algorithm was designed to calculate the messages throughput at the base station for messages transmission over the two channels after distributing the offered load between them. 100 values for distribution percentages and 10 values of the offered load per 1.33 msec were used. In the first case random access channel carry request for transmission over dedicated channel, in the proposed model it carry both requests for transmission over dedicated channel or over itself. The results obtained from the proposed model algorithm were in the form of table and many graphs. The table explains messages throughputs received at the base station for 100 distribution percentage values and 10 offered load values. Also the table explains the optimum distribution percentage value at the given network offered load to obtain maximum message throughput at the base station. The graphs illustrates that the proposed model throughput is higher than throughputs of transmission over random access channel or dedicated channel individually. As seen from the results graphs, for all G values, total throughput is very sensitive for X values near 0 and one. المستخلص الهدف الاساسي من هذه الدراسة هو زيادة عدد رسائل المستخدمين المستقبلة في البرج , وذلك بإستخدام قناتين للإرسال وهما قناة الولوج العشوائي والقناة المخصصة بعد توزيع رسائل المستخدمين بينهما . تم تصميم خوارزميتين لحساب عدد الرسائل المستقبلة في البرج في حالة الإرسال الحصري عبر قناة الولوج العشوائي او القناة المخصصة .أيضا تم تصميم خوارزمية النموذج المقترح لحساب عدد الرسائل المستقبلة فى البرج عند الإرسال عبر القناتين بعد توزيع رسائل المستخدمين بينهما. تم إستخدام 100قيمة لتوزيع الرسائل بين القناتين, و 10 قيم لعدد الرسائل المرسلة خلال 1.33msec. فى حالة الارسال الحصرى عبر القناة المخصصة تنقل قناة الولوج العشوائى طلبات الارسال فقط, اما فى حالة النموذج المقترح فان قناة الولوج العشوائى تنقل الرسائل وطلبات ارسال الرسائل. النتائج المتحصل عليها من خوارزمية الارسال عبر النموذج المقترح عبارة عن جدول ومخططات. يوضح الجدول عدد الرسائل التى تم إستقبالها عند 100قيمة توزيع و10 قيم لعدد رسائل المستخدمين.يوضح الجدول ايضا نسبة التوزيع المثلى عند كل قيمة لعدد رسائل المستخدمين للحصول على أعلى عدد للرسائل المستقبلة فى البرج. توضح المخططات ان عدد الرسائل التى تم استقبالها فى البرج عند الارسال عبر النموذج المقترح أعلى من عدد الرسائل المستقبلة عند الارسال عبر اي من القناتين منفردا. . ايضا توضح النتائج المتحصل عليها ان العدد الكلى للرسائل المستقبلة لكل قيم رسائل المستخدمين يكون تاثرها كبيرا عند قيم التوزيع القريبة من الصفر او الواحد.Item Performance Improvements of the UMTS Systems for Messages Transfer(Al Neelain University, 2016) Tarig Shawgi AbdelrahmanThe main target of this study is to increase throughput of the subscribers messages received at the base station. Two channels were used for messages transfer after distribution of network offered load between them, they are random access channel and dedicated channel. Two algorithms were designed to calculate messages throughput at the base station for messages transmission over random access channel or dedicated channel individually, the proposed model algorithm was designed to calculate the messages throughput at the base station for messages transmission over the two channels after distributing the offered load between them. 100 values for distribution percentages and 10 values of the offered load per 1.33 msec were used. In the first case random access channel carry request for transmission over dedicated channel, in the proposed model it carry both requests for transmission over dedicated channel or over itself. The results obtained from the proposed model algorithm were in the form of table and many graphs. The table explains messages throughputs received at the base station for 100 distribution percentage values and 10 offered load values. Also the table explains the optimum distribution percentage value at 3 the given network offered load to obtain maximum message throughput at the base station. The graphs illustrates that the proposed model throughput is higher than throughputs of transmission over random access channel or dedicated channel individually. As seen from the results graphs, for all G values, total throughput is very sensitive for X values near 0 and one.