Authors: H. Parveen Sultana; P. Venkata Krishna
Addresses: School of Computing Science and Engineering, VIT University, Vellore-632014, Tamil Nadu, India ' Department of Computer Science, Shri Padmavathi Mahila Viswa Vidhalayam, Tirupathi-517502, Andhra Pradesh, India
Abstract: In cyber physical systems (CPSs), wireless sensor actuator networks (WSANs) play a major role in interconnecting the physical world through wireless devices. It is considered that MAC protocol 802.15.4 is an appropriate protocol for CPSs environment. In this paper, we proposed a medium access control procedure with priority called virtually prioritised backoff procedure (VPBP). Smart nodes involved in this network are initially assigned a priority according to its functionality. A smart node with highest priority is accessed by the centre node (coordinator) initially. If a priority of node is equal then by assigning a fair chance, a starving node with highest critical value is allowed to transmit the data. This is to overcome the disadvantage of traditional 802.15.4 carrier sense multiple access with collision avoidance (CSMA/CA) method. Finally, we have proved with the simulation results that the VPBP approach has reduced the collisions in a CPS based wireless networks.
Keywords: cyber physical systems; CPS; wireless sensor actuator networks; WSANs; node priority; MAC protocol 802.15.4; non-beacon enabled; medium access control; wireless sensor networks; WSNs; smart nodes; collision avoidance; simulation.
International Journal of Communication Networks and Distributed Systems, 2016 Vol.16 No.2, pp.99 - 113
Received: 11 May 2015
Accepted: 09 Jul 2015
Published online: 03 Feb 2016 *