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Virtualization  of  Wireless  Sensor  Networks (WSN)  is  a  new  concept  that  can  provide  a  common platform  upon  which  new  federated  sensor architectures can be built, experimented and evaluated. A  Virtualized  Sensor  Network  (VSN)  is  formed  by  a subset  of  sensor  nodes  of  a  physical  WSN  that  is dedicated to a certain task or an application at a given time.  In  this  paper,  we  investigate  the  requirements that virtualization imposes on the routing procedure of the  involved  WSNs  and  propose  a  routing  scheme: Virtualized-EMRP  (based  on  EMRP  [1]).  In  addition, over the same WSN, different applications may require different  QoS  levels  but  satisfying  this  is  not  always  a straightforward  task.  In  the  context  of  VSN,  this  task can  be  resolved  by  initializing  different  instances  of Virtualization-EMRP  routing  protocol  and  adjusting its  routing  metrics.  We  use  OMNET++  simulator  for different  scenarios  of  Virtualized-EMRP  associated with  different  routing  metrics  and  simulation  results show that QoS differentiation for different applications can be achieved.

Providing Different Quality of Service Levels by Routing Protocol for Virtualized Wireless Sensor Networks