hocine86
01-09-2011, 10:46 AM
السّــــــــلام عليـــــــــكم
http://www.zyzoom.net/vb_up/upload/wh_34883539.gif
أقدّم لكم موضوع مفيد جدا
في مجال الاتصالات السلكية و اللاسلكية
صيغة الكتاب: doc
عدد الصفحات:16 صفحة
حجم الملف بعد فك الضغط : 77 k.b
اللغة المستخدمة الانجليزية
تحميل الملف في المرفقات
مقتطفات من الكتاب
INTRODUCTION
GLOBAL SYSTEM FOR MOBILE COMMUNICATION(GSM) is a second generation cellular system standerd.it was the first cellular system to specify digital modulation and network architectures and services. In 1992, gsm is changed to GLOBAL SYSTEM FOR MIBILE COMMUNICATION, before that is GENERAL SYSTEM FOR MOBILE COMMUNICATION
History of GSM
During the early 1980s, analog cellular telephone systems were experiencing rapid growth in Europe, particularly in Scandinavia and the United Kingdom, but also in France and Germany. Each country developed its own system, which was incompatible with everyone else's in equipment and operation.
FEATURES OF GSM
The Europeans realized this early on, and in 1982 the Conference of European Posts and Telegraphs (CEPT) formed a study group called the Groupe Spécial Mobile (GSM) to study and develop a pan-European public land mobile system. The proposed system had to meet certain criteria:
· Good subjective speech quality
· Low terminal and service cost
· Support for international roaming
Architecture of the GSM network
A GSM network is composed of several functional entities, whose functions and interfaces are specified. Figure 1 shows the layout of a generic GSM network.
و معلومات مهمة ستجدونها في هذا الكتاب
http://img478.imageshack.us/img478/186/e57hw1.gif
تقبّلوا تحيات مشرفي الاقسام العلمية
http://www.zyzoom.net/vb_up/upload/wh_34883539.gif
أقدّم لكم موضوع مفيد جدا
في مجال الاتصالات السلكية و اللاسلكية
صيغة الكتاب: doc
عدد الصفحات:16 صفحة
حجم الملف بعد فك الضغط : 77 k.b
اللغة المستخدمة الانجليزية
تحميل الملف في المرفقات
مقتطفات من الكتاب
INTRODUCTION
GLOBAL SYSTEM FOR MOBILE COMMUNICATION(GSM) is a second generation cellular system standerd.it was the first cellular system to specify digital modulation and network architectures and services. In 1992, gsm is changed to GLOBAL SYSTEM FOR MIBILE COMMUNICATION, before that is GENERAL SYSTEM FOR MOBILE COMMUNICATION
History of GSM
During the early 1980s, analog cellular telephone systems were experiencing rapid growth in Europe, particularly in Scandinavia and the United Kingdom, but also in France and Germany. Each country developed its own system, which was incompatible with everyone else's in equipment and operation.
FEATURES OF GSM
The Europeans realized this early on, and in 1982 the Conference of European Posts and Telegraphs (CEPT) formed a study group called the Groupe Spécial Mobile (GSM) to study and develop a pan-European public land mobile system. The proposed system had to meet certain criteria:
· Good subjective speech quality
· Low terminal and service cost
· Support for international roaming
Architecture of the GSM network
A GSM network is composed of several functional entities, whose functions and interfaces are specified. Figure 1 shows the layout of a generic GSM network.
و معلومات مهمة ستجدونها في هذا الكتاب
http://img478.imageshack.us/img478/186/e57hw1.gif
تقبّلوا تحيات مشرفي الاقسام العلمية