A battery recharge model for WSNs using Free-Space Optics (FSO)

One of the most critical limiting factor for a Wireless Sensor Network (WSN) is its battery life. Therefore, a very desirable feature of WSN would be its rechargability to remain operational over longer period of times. However, the nodes needing recharge may not be accessible. In this paper, we present a battery recharge model in WSNs for inaccessible or hard to access environments, at distances up to several hundred meters, using variable power Infrared (IR) laser. While bulk of the sensor network comprises of sensing nodes, the juncture nodes are the ones that relay data towards sink -resulting into faster battery depletion. We present a recharge mechanism for juncture nodes, that utilizes Free Space Optics (FSO) over RF-cliques using IR-laser, Corner Cube Retroreflectors (CCRs) and beam-steering lasers. A Thinfilm Corner Cube Retroreflector (TCCR) is also proposed as a variant to the standard CCR to realize selective recharging. The proposed mechanism provides recharge-ability both for on-demand recharging and scheduled recharging.

[1]  Tomoaki Ohtsuki,et al.  Optical Wireless Sensor Network System Using Corner Cube Retroreflectors , 2005, EURASIP J. Wirel. Commun. Netw..

[2]  Randy H. Katz,et al.  Emerging challenges: Mobile networking for “Smart Dust” , 2000, Journal of Communications and Networks.

[3]  Dharma P. Agrawal,et al.  LIMOC: Enhancing the Lifetime of a Sensor Network with Mobile Clusterheads , 2007, 2007 IEEE 66th Vehicular Technology Conference.

[4]  Suresh Singh,et al.  Exploiting heterogeneity in sensor networks , 2005, Proceedings IEEE 24th Annual Joint Conference of the IEEE Computer and Communications Societies..

[5]  Jaime Llorca,et al.  Reconfigurable optical wireless sensor networks , 2004, SPIE Remote Sensing.

[6]  Minglu Li,et al.  Inductive Charging with Multiple Charger Nodes in Wireless Sensor Networks , 2006, APWeb Workshops.

[7]  Sajal K. Das,et al.  Promoting Heterogeneity, Mobility, and Energy-Aware Voronoi Diagram in Wireless Sensor Networks , 2008, IEEE Transactions on Parallel and Distributed Systems.

[8]  Tomoaki Ohtsuki,et al.  Optical wireless sensor network system using corner cube retroreflectors (CCRs) , 2004, IEEE Global Telecommunications Conference, 2004. GLOBECOM '04..

[9]  Matthew Lease,et al.  Making Sensor Networks Practical with Robots , 2002, Pervasive.

[10]  Shlomi Arnon,et al.  Non-line-of-sight optical wireless sensor network operating in multiscattering channel. , 2006, Applied optics.

[11]  Joseph M. Kahn,et al.  Optical modeling of MEMS corner cube retroreflectors with misalignment and nonflatness , 2002 .

[12]  Miodrag Potkonjak,et al.  Power efficient organization of wireless sensor networks , 2001, ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240).

[13]  Matthew D'Souza,et al.  A Wireless Sensor Node Architecture Using Remote Power Charging, for Interaction Applications , 2007 .

[14]  M. Soljačić,et al.  Efficient wireless non-radiative mid-range energy transfer , 2006, physics/0611063.

[15]  Jan M. Rabaey,et al.  Power Sources for Wireless Sensor Networks , 2004, EWSN.

[16]  Jan M. Rabaey,et al.  Ultra-Low Power Integrated Wireless Nodes for Sensor and Actuator Networks , 2005, Ambient Intelligence.