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

Abstract

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.