Nimbus Centre is investigating the problem of optimized network control in low-power, constrained, sensing infrastructures, where the network topology changes often and communication is costly. The goal is to make efficient use of available communication and sensing resources in a multi-owner, city-wide, sensing infrastructure. Our solution will allow the low-power, constrained, network to support concurrent applications with differing application and communication QoS parameters, while maximising the utilisation of network resources (such as bandwidth) and application resources (such as sensing or processing). Nimbus Centre is conducting research in central network control inspired by Software-Defined Networking (SDN) concepts and optimal usage of network resources with Virtual Network Embedding algorithms.