Torres, LuisLuisTorresKillat, UlrichUlrichKillat2020-06-242020-06-242013Mobile Networks and Management : 4th International Conference, MONAMI 2012, Hamburg, Germany, September 24 - 26, 2012; Revised Selected Papers / Andreas Timm-Giel ... (eds.). - Heidelberg [u.a.] : Springer, 2013. - (Lecture notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering ; 58). - Seite 217-230http://hdl.handle.net/11420/6426Enabling integration of Wireless Sensor Networks (WSN) and smart objects with the Internet is an important milestone towards the so called Internet of Things. Providing these networks with QoS capabilities is crucial for emerging applications that have end-to-end requirements on the border wireless network domain. Impairments such as delays and losses are heavily influenced by the quality of the communication channels, the routing, the MAC protocol and the interactions of these influential factors. In this work we report on a hierarchical routing scheme for sensor networks with multi-channel radios aiming at improving QoS. The scheme decouples the aforementioned influences: The MAC-protocol is responsible for a scheduling in a set of nodes called a cluster. Neighboring clusters use different frequencies. The routing is done at the level of clusters. The (distributed) algorithms executed by the network nodes to support this architecture are evaluated against optimal solutions for clustering, frequency allocation and routing derived from Integer Linear Programming. © Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2013.enClusteringEnd-to-end delaysHeuristicsOptimizationRoutingWireless sensor networksHandel, Kommunikation, VerkehrTechnikIngenieurwissenschaftenConference Paper10.1007/978-3-642-37935-2_17Other