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

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

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

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

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

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

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

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 %

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

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

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 %

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 %

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

2E1512 Wireless Networks - Project Presentation 27 May 2005 Questions

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

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

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

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

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

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

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

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

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