A Cooperative Broadcasting Method for a Sensor Network
Wataru Uemura, Masashi Murata · International Journal of Ad hoc Sensor & Ubiquitous Computing · 2011
Sensor networks and ad-hoc networks, which do not require a base station such as an access point, have a hidden node problem because nodes communicating at the same time cannot know each other's communication status. On other hand, in a wireless infrastructure network the access point manages the communication with the node using RTS (request to send) and CTS (clear to send). However, we cannot use the RTS/CTS method in broadcasting because the number of target nodes is not one but more than two. In this paper, we propose a broadcasting method based on RTS/CTS to avoid this problem. In this method the sender node selects the target node, and they communicate with each other. Neighboring nodes can listen to these packets. Then the sender node can broadcast its information to multiple nodes. We use the wireless nodes specified by IEEE 802.15.4 which is the physical layer's specification. Our experimental results show effective transmissions.