A Cooperative Cache Management Scheme for IEEE802.15.4 based Wireless Sensor Networks

Abstract

Wireless Sensor Networks (WSNs) based on the IEEE 802.15.4 MAC and PHY layer standards is a recent trend in the market. It has gained tremendous attention due to its low energy consumption characteristics and low data rates. However, for larger networks minimizing energy consumption is still an issue because of the dissemination of large overheads throughout the network. This consumption of energy can be reduced by incorporating a novel cooperative caching scheme to minimize overheads and to serve data with minimal latency and thereby reduce the energy consumption. This paper explores the possibilities to enhance the energy efficiency by incorporating a cooperative caching strategy.

Performance of Distributed Energy Aware Routing (DEAR) Protocol with Cooperative Caching for Wireless Sensor Networks

“…Various cache related schemes have been proposed in the past until P. Charan et al [1] proposed a caching scheme to be used in ZigBee based networks for AODV routing protocol. They had evaluated the performance of the proposed algorithm in two analytical models that are star based network model and the grid-based network model respectively.…”

“…According to the simulation results, the grid connection network has better byte hit ratio than the star / cluster connection network. When AODV routing protocol is simulated with the localized CCZ caching algorithm then the average energy consumption was 1.92 mWh for grid network [1], whereas for the same network when DEAR routing protocol with CCZ algorithm is simulated then the energy consumption is 1.12 mWh. This shows that the algorithm is serving the data to the requester by providing the data stored in the cache memory locally or remotely in a particular zone, thereby providing data to the source with minimal latency and higher accuracy.…”

“…ZigBee based mesh networks are more suitable for practical applications, including home automation, intelligent transportation systems, personal healthcare, military communications, and so on. ZigBee device supports low data rate but exhibits enhanced energy consumption due to transceiving data packets, idle listening, overhearing, collisions and packet overheads due to multicast [1]. An efficient routing scheme is therefore essential in a mesh network so as to achieve efficient resources (e.g.…”

“…Bandwidth and Energy Consumption). The possibility of achieving energy efficiency in such networks for AODV routing protocol has been explored previously by Charan et al in [1].…”

Reliability and Energy Efficiency of DEAR Protocol with Cooperative Caching in IEEE802.15.4 based large ubiquitous Wireless Sensor Networks

“…The latter solution is most reliable but more power consuming than the former as it will produce more number of packet overheads. To curb the creation of excessive packet overheads due to retransmissions in a sensor environment a cooperative caching strategy is employed in the network wherein, the data requested by the PAN coordinator or the sink node is retrieved from the on bard cache memory via a local hit, zone hit, remote hit or a global hit [2]. Caching in Cooperative zones (CCZ) is a caching scheme which allows nodes to store frequently accessed data items in the cache memory available at the on-board sensor module.…”