NUS Wireless Mesh Testbed
NUS wireless mesh network is an experimental outdoor testbed deployed in Prince George Park Residences (PGPR), as student residence, in the Kent Ridge campus of the National University of Singapore. PGPR presents a typical urban environment in Singapore, with many high-rise buildings (more than 10 storeys) that are not friendly to the transmission of wireless signals.
This network currently has 20 mesh nodes occupying 20 residential blocks in PGPR. Each node has two Wi-Fi adapters (11abg) with antennas fixed on the wall of buildings. About half of the nodes reside at floor 7 and others at floor 3 and floor 10. The network topology is, therefore, in 3 dimensions. Five of the mesh nodes are equipped with steerable antennas. By controlling the orientation of the antennas, we are able to optimize the link quality in the 3D mesh network, which is common in urban environments.
In addition to the fixed mesh infrastructure, we have also developed aerial mesh nodes using the latest quadcopter technology. Such aerial mesh nodes have a broad range of applications, such as search and rescue operations. Currently our fleet consists of three aerial nodes.