1. Adequacy Between Multimedia Application Requirements And Wireless Protocols Features
Antoine Mercier,Ecole Centrale D`Electronique
Paccale Minet, Inria
Laurent George And Gilles Mercier,LIIA
報告者: 陳冠男
2018/11/13

2. Outline Introduction Background (Comparative Criteria)
Recently wireless standard
Open issue
Conclusion
2018/11/13

3. Introduction MAC protocols and their ability Quality of Service view
User view 使用者希望更高等級
Network view 管理實際QoS等級
Random access mode
asynchronous traffic
Polling mode
real time synchronous traffic
2018/11/13

4. Comparative Criteria Device roaming Mobility of device
Power management
Number of interconnected device
Frequency band
Security (WEP)
Cost
2018/11/13

5. Comparative Criteria Need for infrastructure or not
Centralized or decentralized
Hidden node problem
2018/11/13

6. Hidden node problem
Hidden problem會影響效率及浪費頻寬
2018/11/13

7. IEEE802.11 Ad Hoc Mode / With AP Data transmission
Asynchronous (DCF)
Synchronous (PCF)
Reduce Hidden node program
Request To Send / Clear To Send
CSMA/CA
2018/11/13

8. IEEE 802.11 (wireless LAN) TopologyAP
Basic Service Set
(BSS)
Basic Service Set
(BSS)
Distribution system
(can be any type of LAN)
Access Point (AP)
Independent Basic Service Set
(IBSS)
Also ad hoc network
Infrastructure
Ad hoc network
2018/11/13

9. IEEE service type
2018/11/13

10. 802.11 hidden program solution
CSMA/CA
2018/11/13

11. Bluetooth 同步連結導向連結（SCO）- Data Bursts 非同步非連結導向連結（ACL）
涵蓋低成本,低電力無線電介面的PAN
Setup an Ad Hoc connection
piconet
scatternet
Hidden node program
frequency hopping
Communication
time division duplex (TDD)
連線形式
同步連結導向連結（SCO）- Data Bursts
非同步非連結導向連結（ACL）
2018/11/13

12. 藍芽的Data Transmission
2018/11/13

13. Bluetooth 網路連線方式 Master/Slave model Topology in Bluetooth
Two or more devices sharing the same channel form a piconet.
Two or more piconets form a scatternet.
Slave
Master
Master (control channel access)
Slave
Slave
Slave
Slave
Slave
Slave
piconet
scatternet
1 master up to 7 slaves
1. up to 256 piconets
2. Different hoping sequence at different net
2018/11/13

14. HomeRF 在家庭區域範 圍之內的任何地方，在PC和家用電器之間實現無線數位通信. 簡化的IEEE802.11通訊協定 Ad hoc
語音終端設備
採用TDMA
資料節點設備
採用CSMA/CA
Ad hoc
Data only
With AP
Both voice and data
2018/11/13

15. HomeRF Hidden problem Synchronous traffic Asynchronous traffic
unique AP, not available -ad hoc mode
Synchronous traffic
TDMA
Asynchronous traffic
CSMA/CA
2018/11/13

16. HomeRF MAC frame
2018/11/13

17. HiperLAN/1 5GHz, 23.5Mb/s EY-NPMA solution for hidden
CSMA like, with active signaling
2018/11/13

18. HiperLAN/2 5GHz, 54Mb/s Infrastructure based Connection oriented link
2018/11/13

19. Mac frame in HIPERLAN/2
2018/11/13

20. Wireless protocol comparison
2018/11/13

21. Wireless protocol comparison
2018/11/13

22. Wireless protocol comparison
2018/11/13

23. Open Issue MAC access scheme Routing and mobility 異質網路相連
處理hidden node問題
同步與非同步traffic
real time / no real time
Routing and mobility
QoS routing
移動與確保網路的QoS
異質網路相連
存在多種不同的wireless product
2018/11/13

24. Conclusion Five wireless protocol 頻寬與mobility漸增 Interesting issue
Hidden problem
MAC frame
頻寬與mobility漸增
Interesting issue
整合不同的wireless protocol
2018/11/13