فهرست:
فهرست مطالب.................................................................................................................................................................. هشت
فهرست اشکال...................................................................................................................................................................... یازده
چکیده........................................................................................................................................................................................... 1
1 فصل اول : مقدمه 2
1-1 مقدمه. 2
1-2 مشخصههای اساسی LTE.. 3
1-3 چالشههای موجود و اهداف پایاننامه. 4
1-3-1 دو هدف مهم این پایان نامه. 5
1-4 ساختار پایاننامه. 5
2 فصل دوم : معرفی LTE 6
2-1 مقدمه. 6
2-2 بررسی کلی ساختار شبکه LTE.. 6
2-2-1 بخش هسته شبکه. 7
2-2-2 بخش E-UTRAN.. 8
2-3 ساختار فریم.. 9
2-3-1 FDD 9
2-3-2 TDD 10
2-3-3 ساختار بلوک منبع. 12
2-4 لایهی فیزیکی.. 12
2-4-1 روش دسترسی OFDMA.. 13
2-4-2 روش دسترسی SC-FDMA.. 14
2-5 کیفیت سرویس و کلاس‌های سرویس در LTE.. 15
2-5-1 مدل حامل.. 15
2-5-2 QCI 17
2-5-3 ARP 18
2-6 مدل ترافیکی.. 18
2-6-1 مدل ترافیکی ارسال صدا از طریق اینترنت... 18
2-6-2 مدل ترافیکی صفحات.. 19
2-6-3 مدل ترافیکی ویدئو. 20
3 فصل سوم زمانبندی در شبکههای LTE 21
3-1 مقدمه. 21
3-2 روش های زمانبندی در زیرلایهی MAC شبکههایLTE در جهت فروسو. 22
3-3 استراتژیهای زمانبندی برای شبکههای LTE در جهت فروسو. 23
3-3-1 استراتژی ناآگاه از کانال. 24
3-3-2 استراتژی آگاه از کانال/ناآگاه از کیفیت سرویس.... 27
3-3-3 استراتژی آگاه ازکانال /آگاه ازکیفیت سرویس.... 30
3-4 الگوریتمهای مورد استفاده در مقایسه. 33
3-4-1 الگوریتم زمانبندی در دوسطح.. 34
3-4-2 الگوریتم M-EDF-PF.. 37
3-4-3 الگوریتم FBAQ... 38
4 فصل چهارم الگوریتم پیشنهادی و شبیهسازی 44
4-1 مقدمه. 44
4-2 بیان الگوریتم پیشنهادی برای تخصیص منابع. 45
4-3 مقدمات و ملزومات الگوریتم.. 45
4-4 نوآوری های انجام شده. 46
4-5 پیشنیازهای الگوریتم.. 47
4-6 شرح الگوریتم پیشنهادی.. 50
4-6-1 تقسیم بندی کاربران بر اساس سرعت حرکت آنها 51
4-6-2 محاسبهی نرخ ارسال داده کاربران تا ایستگاه مبنا 51
4-6-3 محاسبهی اولویت هر صف... 54
4-6-4 ساختار جدید فریم.. 56
4-6-5 محاسبه و تخصیص بلوک منابع مورد نیاز هر صف با توجه به تامین نیاز کیفیت سرویس کاربر. 57
4-7 شبیهسازی و نتایج.. 62
4-7-1 نحوهی محاسبهی مقادیر محور افقی نمودارها 62
4-7-2 ترافیک اعمالی به شبکه. 65
4-8 بررسی نتایج حاصل از شبیهسازی.. 66
5 فصل پنجم نتیجهگیری و پیشنهادها 71
5-1 خلاصه. 71
5-1-1 روشهای تخصیص بلوک منابع. 72
5-2 پیشنهادها 73
منابع و مآخذ. 75
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