Implementation and evaluation of efficient one-to-many content distribution method in wireless LAN with high node density

Along with the rapid increasing use of wireless LAN (Wi-Fi) enabled devices, nowadays it is becoming possible for users to exchange data wirelessly without the need of network infrastructure. Therefore, during disaster time when network infrastructure is not available, utilizing Wi-Fi as a means for information sharing to those in the disaster affected area can be a promising solution. Especially, in such situations delivering information to several hundred of victims at the refuge site or stranded commuters at stations is important. However, to make this possible, fast content distribution method in large scale Wi-Fi network with high node density is required. To achieve this goal, we have proposed an efficient one-to-many content distribution method. In this paper, we show the evaluation results of our proposed method in wireless LAN with high node density through simulations and experiments. Through simulations, we confirmed that our approach outperforms content distribution using FTP in wireless LAN consists of several hundred nodes. Furthermore, we also implemented a prototype of our method as a software. Through experiments by installing our software on tablets, we confirmed the feasibility of our method in real Wi-Fi network which consists of 100 nodes and found that it is expectable that our method will outperform the conventional method as the number of nodes increases.