presentation about theory and physics behind long range wireless data equipment

16
FDD, TDMA, WDS: вот это всё НЕМНОГО СКУЧНОЙ ТЕОРИИ

Upload: bogdan-vakulyuk

Post on 17-Feb-2017

244 views

Category:

Technology


0 download

TRANSCRIPT

Page 1: Presentation about theory and physics behind long range wireless data equipment

FDD, TDMA, WDS: вотэто всё НЕМНОГОСКУЧНОЙТЕОРИИ

Page 2: Presentation about theory and physics behind long range wireless data equipment

Конвергентные сети

, -Аудио видеоконференцсвя

зь

СКУД

Мультимедийныеинсталляции

Wi-Fi, BYOD

Управлениеинфраструктуро

й

IP- ,телефонияcall-центры

Page 3: Presentation about theory and physics behind long range wireless data equipment
Page 4: Presentation about theory and physics behind long range wireless data equipment

Два способа организации

доступа к среде передачи С централизованным управлением С децентрализованным управлением

Page 5: Presentation about theory and physics behind long range wireless data equipment

:: Централизованное управление маркеры

Page 6: Presentation about theory and physics behind long range wireless data equipment

:: Децентрализованное управление CSMA

Page 7: Presentation about theory and physics behind long range wireless data equipment

CarrierSenseMultipleAccess

CollisionDetection

Page 8: Presentation about theory and physics behind long range wireless data equipment

Проблемы CSMA

“Скрытые” узлы Задержка распространения

сигнала

Page 9: Presentation about theory and physics behind long range wireless data equipment

(c) home-computer-service.ru

Wireless Distribution Systems

Page 10: Presentation about theory and physics behind long range wireless data equipment

Frequency Division Duplex

Page 11: Presentation about theory and physics behind long range wireless data equipment

ЗоныФренеля

Page 12: Presentation about theory and physics behind long range wireless data equipment

ЗоныФренеля

Page 13: Presentation about theory and physics behind long range wireless data equipment

Time Division Duplex

Page 14: Presentation about theory and physics behind long range wireless data equipment

FDD против TDD

Page 15: Presentation about theory and physics behind long range wireless data equipment

Частотные диапазоны

, «Сантиметровый Wi-Fi», диапазон 5-6 Ггц

Миллиметровый диапазон 60-90 Ггц

Page 16: Presentation about theory and physics behind long range wireless data equipment