Redundancy Elimination Techniques in Wireless Multimedia SensorNetworks: Survey

Abstract

The evolution of Wireless Multimedia Sensor Networks(WMSNs) has been enhanced by the existence of cheap hardware such as microphones and (CMOS) cameras that can ubiquitously hold multimedia content from the entire environment. The spatial proximity of the different cameras (the overlapping Field of Views (FoVs)) causes a transmission of redundant data. Redundancy is the existence of data that is additional to the actual data and permits. A redundancy causes transmission of same data repeatedly. In WMSN, the redundant data elimination is a critical task to reduce the communication cost in terms of unnecessary energy wastage, bandwidth used and CPU processing. In this context, this paper proposed a brief discussion of the following techniques: i) Event monitoring based actuation algorithms which depends on activating the minimum number of cameras sensors while still maintaining the necessary coverage of the event of interest to reduce the possibility of multimedia data redundancy. ii) Cover set construction strategies for enabling efficient scheduling of nodes in mission-critical surveillance applications. iii) Clustering algorithms for WMSNs based on the overlapped field of views (FoVs) coverage areas.