Improving the Performance of TCP over Satellite Links by Modifying the Protocol TCP-Peach+ to Become Satellite Transport Protocol (STP)

This research includes an amendment to a TCP-Peach+ protocol to improve the performance of the TCP over satellite links, Where the protocol has been proposed based on splitting the connecting path between the source and target, in order to obtain an adjusted protocol of the kind of Satellite transport protocol (STP) specialized in the space segment only, and that by proposing a new algorithm for this protocol which is located under the satellite transport layer (STL). We have focused in our research on a comparison between the proposed protocol and TCP-Peach+ protocol.

Analyzing the performance of multiple access protocols when using for satellite channel to connect two earth station

This research contains an analysis of performance of multiple access protocols when using for satellite channel to connect between earth station(HUB) and VSAT through satellite .The performance of those protocols has been compared through the following points: 1)the transmission power which is required by the earth station. 2) the transmission power which is required by the satellite's transponder . 3)the require frequency bandwidth. 4)the maximum number of the earth stations in the network. 5)the delay which is caused by using those protocols. This study has introduced head lines to choose the proper multiple access protocol for the required service from the satellite channel preserving the lowest cost to have the ideal performance for satellite channel.

معوقات نقل الصوت بالزمن الحقيقي عبر شبكة الإنترنت و الحلول المقترحة دراسة حالة: التأخير الزمني

تطورت شبكة الإنترنت بشكل كبير في السـنوات الأخيـرة، و أصـبح نقـل ملفـات المعلومات ممكناً و بزمن قياسي، و أصبح من الضروري التفكير بعملية نقل الصـوت و نقل الفيديو عبر هذه الشبكة، و حتى نصل إلى عملية الوصـل المباشـر و بـالزمن الحقيقي للتوصل إلى المؤتمرات سواء الصوتية أو الفيديوية منها، و ذلك مـن أجـل تطبيقات عدة من أهمها استخدامها في الـتعلم عـن بعـد، و إقامـة المحاضـرات و المؤتمرات البعيدة المدى و دون التواجد تحت سقف واحد، و حتى الاتصالات البعيدة المدى و التي عادة ما تكون ذات تكلفة عالية. و نحن هنا في هذه الأطروحة سوف نقوم ببحث عمليـة النقـل هـذه عبـر شـبكة الإنترنت، التي تستخدم بروتوكول IP/TCP المشـهور بعمليـة تقطيـع و تحـزيم المعلومات المنقولة عبره، و استخدامه تقنية التحزيم و وضع عنوان المرسل و عنوان المستقبل في ترويسة الحزمة، و سوف نتعرض للمشاكل التي تواجه هـذه التقنيـة الجديدة و الحلول المقترحة لذلك.

A Study of QoS in Long Term Evolution Networks "LTE"

Long Term Evolution “LTE” is considered to be one of the most important and latest communication technologies falling under the fourth generation of cellular communications technology 4G. LTE supports high-speed and large bandwidth which makes it a great candidate to providing the potential to improve the Quality of Service "QoS" associated with specific types of data transfer. As a consequence, researchers have paid their attentions to this type of networks. In fact, it was a great challenge for researchers to achieve a good level of QoS for all users as the LTE provides Audio and Data transmission to users at the same time.

Databases Systems & Communication Techniques Applications in Medical Services

The purpose of this study is to offer help to patients through the employment of databases applications of existing and available telecommunication systems in medical services ,particularly treatment. So that it can be possible to avoided what can be avoided of health disasters that a human being encounter without warning. This study examines how modern technologies can be employed in controlling and processing some vital signs of human beings,particulary those who suffer some health problems affiliated with some diseases ,and keeping these problems under control in order to maintain the stability of the patients health statues. The vital signs that the study is applied to are blood pressure, pulse and blood glucose, since any of change in the value of any of these signs, positive or negative, may cause the patient to have a sudden health problems.