7Th Ieee International Conference on Distributed Computing in Sensor Systems (Dcoss), Date: JUN 27-29, 2011, Location: Barcelona, SPAIN, Patrocinadores: IEEE, Ctr Tecnologic Telecomunicacions Catalunya (CTTC), IEEE Comp Soc Tech Comm Parallel Proc (TCPP), IEEE Comp Soc Tech Comm Distributed Proc (TCDP)