An optimization scheme in wireless temperature measuring sensor network

Abstract

In wireless sensor networks, power consumption is a critical issue. For our National Grid temperature measuring and monitoring project, energy harvesting is limited to provide sufficient power to temperature measuring nodes allocated throughout the entire grid substation site. To maintain longer lifetime of the entire network is especially important. Currently, various media access control (MAC) layer protocols use different energy scheduling methods to realize data transmission on wireless channel under noisy environment. Although they are efficient for data transfer, they have limitations on saving power consumption.This paper proposes a network design solution for efficiently managing the energy consumption of wireless sensor network, in which sleep scheduling and forwarding set choosing are improved. Network nodes choose their own sleep scheduling parameters adaptively. Nodes also select individual forwarding set according to a set of priority criteria. In addition, nodes have their backup nodes determined by a set of rules in order to handle critical events and in case of node failure. Overall, this scheme enhances MAC layer's ability to more efficiently control and lower network node energy consumption, leading to increased lifetime for the entire network. Omnet++ is used to run the network simulation. The results show advantages over other MAC protocols.

Concept of Designing Thermal Condition Monitoring System with ZigBee/GSM Communication Link for Distributed Energy Resources Network in Rural and Remote Applications

“…The GAL allows interoperability of different WSNs with the application platform (Profibus-DP). GAL is compatible with ZigBee standard [56,62,77]. GAL can be directly incorporated as interface and its performance is in compliance with IEEE 802.15.4 [56].…”

“…It allows possible local and remote signal feedbacks to be managed, employing suitable security actuation and data measurement transfers. The components of the ZigBee WSNs consist of three essential elements, namely the sensor nodes, radio communication with the router through star architecture or connected in a gateway mesh network that acts as an interface between WSNs, and the application platform [21,61,77,81,82]. In the industrial application, WSNs gateway acts as the data sink for the sensor nodes and connect to the application platform through connections of LAN or GSM.…”

“…Sensors node do not communicate with each other directly, but through the network routers or the configuration of the on-board mesh switching, constituting the self-organized WSNs. Routers are always designed to be on and should always have active power sources [21,[54][55][56][57]77]. Table 2, presents the features of ZigBee device being used in this paper.…”