The introduction of new services with different bandwidth requirements, e.g., data and multimedia, to cellular mobile radio networks makes many of the traditional mechanisms unusable or less efficient. The call admission control and the handover handling are the most sensitive issues to this extension. The performance of all services including the traditional voice and the new services can be dramatically effected if no appropriate schemes are used. In this research work, a new call admission and handover handling schemes for a cellular mobile network that offers two service types: voice and data is proposed. The data connections are assumed to be transmitted at different data rates, which are an integer multiple to that of one traffic channels, which are full speed(Cd1) & reduced peed(Cd2). In order to reduce the handover failure probability of data connections, the data mobile terminals (MT) are assumed to have the capability of transmitting at two different data rates. If the handover request can not be satisfied by the base station of the destination cell due to unavailable free traffic channels, the data mobile terminals tries with a lower data rate. The handover fails if the network is incapable on providing the minimum data rate at which the mobile terminal can transmit. The reduced data connection or data rate can be speeded up to full data rate or full speed as soon as enough bandwidth is available. The effect of different traffic and configuration parameters on the performance of the different models for two cell model with equal input traffic intensity, two cell model with different input traffic intensity, and two cell model with equal input traffic intensity considering the congestion rate for the highway model are studied as the models of this research. These models are built using MOSEL language (Modeling Specification and Evaluation Language). The results of investigating the mentioned models showed the effect of the handover, and speed of data on these different models.
W. ABUGHRES(1-2000)

AbstractThis paper examines the process of sending an image over wireless mobile Channels with errors while maintaining bandwidth, transmission speed and image quality. With the tremendous development in networks, new wireless channels have been opened that threaten the security of data transmitted through networks and communication channels, and from this emerged Encryption techniques to increase the security of the transmitted data, and since the digital image compression algorithm is a process to reassemble the parts of the image so that it takes less space, but this increases the impact of the error extension in sending compressed digital images and greatly reduces the quality of the received image. This prompts us in this paper to study the performance of HQAM technology for the purpose of transmitting image data over wireless communication channels containing errors. In this paper, image quality performance has been evaluated by the BER, SNR, PSNR, SSIM, and Correlation evaluation criteria. The simulated results show that there is an improvement in the image quality received using the proposed technique.
wael saleh mohamed abughres, , , Ashrf Alzrouk Almagdob1, Ahmed B. Abdurrhman, Ibrahim A.Nasir, (9-2020)

تعطي هذه الاطروحة خلفية عن أجهزة الموبيل , الشبكات الاسلكية, تطبيقات الشبكات الاسلكية والانترنت موبايل كما أعطت خلفية عن تطيبقات البرتوكولات اللاسلكية والبنية التحتية للوب وذلك لتحديث تطيبقات الموبايل باستخدام لغة HTML واللغات الجديدة مثل WML و XML الناطقة. ولقد افترضت الاطروحة ان هناك معرفة مسبقة بلغات تصميم صفحات الويب وهي HTML و XHTML وتطرقت الى بعض المبادئ للغة JSP.إن المعضلة هذه الايام تكمن في كيفية التحادث بين اللغات المختلفة للانترنت وايصالها الى الاجهزة المتنوعة مثل PC Browser – PDA – أو أجهزة النقال المختلفة ، وتعزى هذه المشكلة الى وجود اختلافات في قدرة الاجهزة من حيث حجم الشاشة وقدرة استقبالها للوسائط المتعددة (الصوت والصورة والفلاش).ولحل هذه المشكلة سوف نقوم باستخدام قاعدة بيانات تحتوى جميع قدرات الاجهزة المعلوماتية وسوف يتم ذلك عن طريق استخدام (Mobile Aware Software) وهو قاعدة بيانات شاملة تحتوى على اكثر من 500 جهاز بأقسامه ، وقد تم تنفيذ هذه الطريق بتصميم صفحة أنترنت للكمبيوتر وإدخال بعض الاضافات وبعض الخطوات البسيطة لاتاحة نقل هذه الصفحة وعرضها في الاجهزة النقالة المختلفة.وتم اثبات وتحقيق هذا الحل عن طريق استخدام موقع لقسم الهندسة الكهربائية والالكترونية والذى تم تحويله الى اجهزة مختلفة ولاحظنا الاختلافات التى طرأت على الموقع ، وبهذه الطريقة نستطيع الان نقل أي موقع الى اي جهاز أخر في دقائق معدودة بدون اللجوء الى لغات معقدة او ملفات كبيرة. Abstract This thesis provides some background on mobile devices, wireless networks, mobile internet and wireless application networks and some back ground about wireless application protocol, web infrastructure for mobile application development using HTML, and newer markup language such as wireless markup language (WML) and Voice XML.It assumes that the web page designs using HTML and XHTML are already know. It also provides some background on basic JSP.The Conversion between Internet languages and delivering them to multiple devices is problem now days, for example PC browser, PDA and Mobile Phone Devices. This is due to differences in device capability and requirements including Markup language and screen size and media capabilities ((images flash, audio)).To solve the problem we will use data store which is contain all device capability information’s ,by using the Mobile Aware software to provides a comprehensive device database containing more than 500 devices and device classes, and it’s done by design a normal webpage for PC Browser and inserting some tag and adding a few simple steps to provides the possibility of transfer the web site internet to multi devices such as PDA, Mobile devices. It was demonstrated by using real web site for Electrical & Electronic department which is transferred to different devices, and we have noted changes that took place for the web site, and now we are able to transfer any web site to any device in few minutes without having to know a complicated language or large files.
ميسون عمر كريم (2006)