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Wireless Networks KTH Do-it-Yourself-Radio: an Ad-Hoc User Centric Solution all the Way Down from Content Creation to Broadcast Distribution Nicolas Debernardi.

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Presentation on theme: "Wireless Networks KTH Do-it-Yourself-Radio: an Ad-Hoc User Centric Solution all the Way Down from Content Creation to Broadcast Distribution Nicolas Debernardi."— Presentation transcript:

1 Wireless Networks KTH Do-it-Yourself-Radio: an Ad-Hoc User Centric Solution all the Way Down from Content Creation to Broadcast Distribution Nicolas Debernardi Markus Jäger Jean - Christophe Laneri Malek Sraj Advisor: Pietro Lungaro

2 2E1512 Wireless Networks - Project Presentation 27 May 2005 Overview Project Goals System Model Performance Measures Service Definition Simulation Results Conclusion

3 2E1512 Wireless Networks - Project Presentation 27 May 2005 Project Goals Evaluate the feasibility of providing specific radio programs in sparse user-deployed networks with respect to user experience and infrastructure density. Quantify the impact of multihopping on the provision of such services. Goals System Model Performance Services Results Conclusion

4 2E1512 Wireless Networks - Project Presentation 27 May 2005 Environment Goals System Model Performance Services Results Conclusion User-deployed network Uniformly distributed access points Mobility model Pedestrian Propagation model Only LOS considered Interference-free environment Wireless LAN g Rate model Ideal link adaptation (Shannon bound) Maximum rate: 54 Mbps

5 2E1512 Wireless Networks - Project Presentation 27 May 2005 Access Policies Segment: 3 min MP3 file at rate R=64 Kbps Access point to user communication Bandwidth exclusively assigned to nearest user User to user communication Establish connection to nearest neighbor Stay connected within a chosen range Fully cooperative users No priority Goals System Model Performance Services Results Conclusion

6 2E1512 Wireless Networks - Project Presentation 27 May 2005 Access Protocols (2) System Model Performance Services Results Conclusion

7 2E1512 Wireless Networks - Project Presentation 27 May 2005 Performance Measures Service cost T off : time users wait before playing T fail : time users have nothing new to play Relative gains introduced by multihopping ΔC: service cost improvement ΔBS: infrastructure improvement C = T off +T fail Goals System Model Performance Services Results Conclusion

8 2E1512 Wireless Networks - Project Presentation 27 May 2005 Service Definition (1) Service 1: Playlist Service 2: Talk Show Service 3: Playlist plus News Goals System Model Performance Services Results Conclusion r c = 0 % r c = 100 % r c : percentage of critical files r c = 25 %

9 2E1512 Wireless Networks - Project Presentation 27 May 2005 Service Definition (2) Service 1: Playlist Service 2: Talk Show Goals System Model Performance Services Results Conclusion

10 2E1512 Wireless Networks - Project Presentation 27 May 2005 Simulation Results (1) Iso-cost system configurations for service 1 Cost range: s Requirement: 90 % of the users satisfying the QoS Goals System Model Performance Services Results Conclusion

11 2E1512 Wireless Networks - Project Presentation 27 May 2005 Simulation Results (2) Service cost comparison Goals System Model Performance Services Results Conclusion r c = 100 % r c = 25 % r c = 0 % r c = 100 % r c = 25 % r c = 0 %

12 2E1512 Wireless Networks - Project Presentation 27 May 2005 Simulation Results (3) Gain of multihopping Goals System Model Performance Services Results Conclusion r c = 0 % r c = 25 % r c = 100 %

13 2E1512 Wireless Networks - Project Presentation 27 May 2005 Conclusion Goals System Model Performance Services Results Conclusion What multihopping offers: Higher user satisfaction Lower infrastructure cost Best service? In terms of performance: service 1 Live vs performance: service 3

14 2E1512 Wireless Networks - Project Presentation 27 May 2005 Questions

15 2E1512 Wireless Networks - Project Presentation 27 May 2005 The Radio SOSL GROOVE TRANSISTOR RADIO - IVORY Features: - AM/FM Radio with dial light - Light On/Off switch - Volume On/Off control - Power on LED indicator - Telescopic FM antenna - Powered by: 4 x AA battery Specs: - Output power: 250mW - Speaker: 3 inches, 8 ohm Unit Dimensions (inches): 7.5 X 4.8 X 2.3

16 2E1512 Wireless Networks - Project Presentation 27 May 2005 Communication range Exchanged data during a meeting between users

17 2E1512 Wireless Networks - Project Presentation 27 May 2005 Propagation model Dual slope model with break point at 8 m: Channel bandwidth: 20 MHz Noise power: dB Previously used for modeling the propagation of wireless LAN g access points in the 2.4 GHz band

18 2E1512 Wireless Networks - Project Presentation 27 May 2005 Time Offset vs Failure Time

19 2E1512 Wireless Networks - Project Presentation 27 May 2005 Service Definition (1) Service 1: Playlist Service 2: Talk Show

20 2E1512 Wireless Networks - Project Presentation 27 May 2005 Service Definition (2) Service 3: Playlist plus News

21 2E1512 Wireless Networks - Project Presentation 27 May 2005 Simulation Results (1) Iso-cost system configurations for service 1 Cost range: s Requirement: 90 % of the users satisfying the QoS

22 2E1512 Wireless Networks - Project Presentation 27 May 2005 Simulation Results (2) Iso-cost system configurations for service 2 Cost range: s Requirement: 90 % of the users satisfying the QoS

23 2E1512 Wireless Networks - Project Presentation 27 May 2005 Simulation Results (3) Iso-cost system configurations for service 3 Cost range: s Requirement: 90 % of the users satisfying the QoS


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