**7. References**


of monitoring performance and power conservation of cluster members. In a monitoring mechanism utilizing intra and inter cluster cooperation, sensing regions are allocated to intersected clusters thus can be monitored with a higher frequency and/or consuming less amount of energy although the node selection and scheduling procedure will be more

In this chapter a mechanism for management the wireless multimedia sensor nodes, was described. The mechanism, first, clusters nodes according to their scale of similarity in covering the environment; second, selects and schedules members of established clusters to monitor the sensing region which is divided among clusters. The members of each cluster are scheduled with an exclusive frequency based on the number of members in the cluster and the scale of overlapping among fields of view of the cluster members and thus the monitoring efficiency is increased. Moreover, because of the established intra cluster coordination and collaboration, sensing subsystem of multimedia nodes are optimized to avoid redundant and overlapped sensing. Thus, the capability of energy saving is considerably enhanced with respect to ordinary duty-cycling manners of environment monitoring by WMSNs. On the other hand, optimizing the data sensed by sensing subsystem results in conservation of energy in the transmission and processing subsystems since they meet less amounts of multimedia data to be transmitted and/or processed by the network nodes. Results show how this mechanism prolongs the network lifetime along with

This work is partially supported by the EuroNF NoE and grants TIN2010-21378-C02-01 and

Adriaens, J.; Megerian, S. & Potkonjak, M. (2006). Optimal worst-case coverage of

Akyildiz, I. F.; Melodia, T. & Chowdhury, K. R. (2007). A Survey on Wireless Multimedia

Alaei, M. & Barcelo-Ordinas, J.M. (2010). A method for clustering and cooperation in

Alaei, M. & Barcelo-Ordinas, J.M. (2010). MCM: multi-cluster-membership approach for

directional field-of-view sensor networks, *Proceedings of the 3rd IEEE Communication Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks (IEEE SECON)*, pp. 336–345, ISBN 1-4244-0626-9, Reston, VA USA, September 25–28, 2006

Sensor Networks. *Computer Networks*, Vol. 51, Issue 4, (March 2007), pp. 921-960,

Wireless Multimedia Sensor Networks. *Sensors*, Vol. 10, No. 4, (March 2010), pp.

FoV-based cluster formation in wireless multimedia sensor networks, *Proceedings of The 6th International Wireless Communications and Mobile Computing Conference (IWCMC 2010)*, pp. 1161-1165, ISBN 978-1-4503-0062-9, Caen, France, June 28-July 2,

complicated. Some initial work has been done in (Alaei & Barcelo, 2010).

**5. Conclusion** 

a better monitoring performance.

ISSN 1389-1286

2010

3145-3169, ISSN 1424-8220

**6. Acknowledgment** 

SGR2009-1167.

**7. References** 

