1. Using 802.11 in an FTTP Application

2. FTTP Application

3. FTTP with 802.11

4. Issues to Consider Equipment Availability Security Bandwidth Propagation distances Quality of Service

5. Service Offerings Data Services –5Mbps downstream / 2Mbps upstream –15Mbps downstream / 2 Mbps upstream –30 Mbps downstream / 5 Mbps upstream Video Services –Today optical wavelength overlay –Future – IP TV 3-4 Mbps per channel 19 Mbps per channel (high definition) Telephony Service –4 voice channels (analog today) –VOIP – 100Kbps per voice channel

6. 802.11 Data Rates Data Rate (Mbps)802.11b802.11a802.11g 190+- 275- 5.5(b)/6(a/g)6060+65 9-5055 11(b)/12(a/g)504550 18-4050 24-3045 36-2535 48-1525 54-1020

7. Quality Of Service Voice and video data have QOS requirements Data services can be supported using DCF Consider using PCF Enhanced QOS mechanisms are specified in 802.11e

8. Point Coordination Function ONT could be used as Point Coordinator ONT polls phones for voice traffic ONT can “pace” the downstream video traffic No control over upstream data packet size If VOIP packet size could be set, then PCF may achieve QOS Better alternatives available from 802.11e

9. 802.11e QOS Methods

10. 802.11e Traffic Priorities 8 traffic priorities are used from 802.1d –Background (1) –Background (2) –Best Effort (0) –Best Effort (3) –Video (4) –Video (5) –Voice (6) –Voice (7) These are mapped to 4 Access Categories –Voice –Video –Best Effort –Background

11. Arbitration Inter Frame Space

12. HCCA QOS equivalent to PCF Allows for contention period and contention free period Polling in contention free period include QOS details Allows HC to fairly allocate medium considering QOS Contention period uses EDCA

13. Results from Simulation DCF vs EDCA

14. Conclusions 802.11 could be used to deliver current FTTP services 802.11e can provide QOS No growth path for HD TV Not useful for MDU application IP phones currently too expensive Security can be managed with pre-shared keys Unlikely to become a common ONT interface