Sink mobility protocols for data collection in wireless sensor networks

Abstract

In wireless sensor networks data propagation is usually performed by sensors transmitting data towards a static control center (sink). Inspired by important applications (mostly related to ambient intelligence) and as a first step towards introducing mobility, we propose the idea of having a sink moving in the network area and collecting data from sensors. We propose four characteristic mobility patterns for the sink along with different data collection strategies. Through a detailed simulation study, we evaluate several important performance properties of each protocol. Our findings demonstrate that by taking advantage of the sink's mobility, we can significantly reduce the energy spent in relaying traffic and thus greatly extend the lifetime of the network. Copyright 2006 ACM

Trajectory of Mobile Sink Node Using GPSR in WSN to Enhance Energy Efficiency

“…In a pull strategy, a node forwards its data only when the sink initiates a request for it, whereas in a push strategy a node proactively sends its data towards the sink. Chatzigiannakis et al have shown in [26] that random sink mobility can be used to reduce Emax and Ebar compared to the case of a static sink. Single hop data collection leads to the strongest reduction of energy consumption, because no data relaying load on the sensor nodes exists.…”

“…Controlled mobility refers to schemes where sink mobility is controlled or guided based on a parameter of interest, such as residual energy of the nodes, or on a predefined objective function, or on predefined observable events [26]. A mobile sink with energy conscious approach tries to stay away from the nodes with less residual energy and tries to be in the vicinity of those nodes that have high residual energy.…”

A Routing Algorithm for Mobile Multiple Sinks in Large-Scale Wireless Sensor Networks

“…Reference [5] proposes mobility patterns for the sink and takes the advantage of sink's mobility to prolong the lifetime of the network. In [6] and [7], it is proven that that mobile sink node improves the lifetime of the network.…”

“…In [4], sink node is repositioned to enhance the performance metrics. Other related studies [5]- [9] are proposed to prolong the lifetime of the network or to reduce the energy consumption in routing. However, as the network size grows, the length of the constructed paths will increase, causing the problem described above more challenging.…”

Performance measures of fuzzy C-means algorithm in wireless sensor networks

“…Movement of the sink can follow different types of pattern in a given geographical area such as random, predetermined/fixed path or controlled movement, in order to improve the life time of WSNs. In Chatzigiannakis et al (2006), authors described a single sink WSNs uses a pull strategy to collect data from SNs. The main disadvantage of single sink is its poor coverage.…”