%0 Book Section %B Mobile Computing, Applications, and Services: Second International ICST Conference, MobiCASE 2010, Santa Clara, CA, USA, October 25-28, 2010, Revised Selected Papers %D 2010 %T Small World VoIP %A Yang, Xiaohui %A Stavrou, Angelos %A Ram Dantu %A Wijesekera, Duminda %E Gris, Martin %E Yang, Guang %K closeness %K electing %K mobility %K optimize %K Peer-to-peer %K popular %K small world %K VoIP %X

We present the analysis and design of a Small World VoIP system (SW-VoIP) which is geared towards customers that are communicating with their Small World of social contacts. We use the term Small World to refer to the Peer-to-Peer (P2P) network of a client and his contacts both incoming and outbound. We reconstruct the small world of a user by collecting calling patterns over a configurable period of time. We enable user mobility by using a stepwise social identity to an IP address binding propagation model. We propose an efficient algorithm to locate users by electing popular users and leveraging the users closeness. We also introduce a self-stabilized load balancing mechanism to optimize the system performance under heavy network traffic. We evaluate our SW-VoIP system performance by simulating the user’s lookup process using real-world telephone logs. Our experimental results show that our SW-VoIP system offers a better performance in optimizing the required routing path and reducing the average lookup delay when compared to traditional, non small-world P2P VoIP systems.

%B Mobile Computing, Applications, and Services: Second International ICST Conference, MobiCASE 2010, Santa Clara, CA, USA, October 25-28, 2010, Revised Selected Papers %I Springer Berlin Heidelberg %C Berlin, Heidelberg %P 137–155 %@ 978-3-642-29336-8 %G eng %U http://dx.doi.org/10.1007/978-3-642-29336-8_8 %R 10.1007/978-3-642-29336-8_8