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Article RoCoMAR: Robots ’ Controllable Mobility Aided Routing and Relay Architecture for Mobile Sensor Networks
, 2013
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2012 8th IEEE International Conference on Distributed Computing in Sensor Systems Controlled Straight Mobility and Energy-Aware Routing in Robotic Wireless Sensor Networks
"... Abstract—Power-aware routing and controlled mobility schemes are two commonly used mechanisms for improving communications in a wireless sensor network. While the former actively consider the transmission costs when selecting the next hop on the route, the latter instruct mobile relay nodes (either ..."
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Abstract—Power-aware routing and controlled mobility schemes are two commonly used mechanisms for improving communications in a wireless sensor network. While the former actively consider the transmission costs when selecting the next hop on the route, the latter instruct mobile relay nodes (either sensors or actuators) to pursue more promising locations so as to optimize end-to-end transmission power. Rarely, if ever, the two methodologies are exploited together for achieving relevant energy savings and prolonging network lifetime. In this paper, we introduce a hybrid routing-mobility model for the optimization of network communications. First, we find a multi-hop path between a source and its destination in an energy-efficient fashion and then we move all hop nodes in an uninterrupted, straight manner to some predefined spots with optimal energy-saving properties, fully preserving the path connectivity as they move. Such synergetic approach allowed us to: (1) seamlessly guarantee message delivery regardless of the network density (average number of neighbors per node); (2) easily incorporate any powerrelated optimization criterion to the routing protocol and (3) even target scenarios where both end nodes are actually disconnected from each other. Results gathered from extensive simulations argue for the introduction of the proposed hybrid framework. Index Terms—controlled mobility; power-aware routing; guaranteed delivery; mobile sensor network I.
Mobile Systems (MSWIM) (2012)" Transmission Power Adaptation Based Energy Efficient Neighborhood Discovery
, 2013
"... Abstract—Neighborhood discovery- detection of the devices within communication range using HELLO messages- is a fundamental mechanism in wireless sensor networks (WSN) which enables usage of many different topology control and routing algorithms. Even though it is very important, most of the algorit ..."
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Abstract—Neighborhood discovery- detection of the devices within communication range using HELLO messages- is a fundamental mechanism in wireless sensor networks (WSN) which enables usage of many different topology control and routing algorithms. Even though it is very important, most of the algorithms does not take into account parameters of the neighborhood discovery. We present two algorithms that adapt power of transmission of the sensors in a mobile WSN by still adapting frequency of HELLO messages in order to save energy and get accurate neighborhood tables. First solution is based on the knowledge of turnover- change in the number of neighbors in consecutive iterations of the neighborhood discovery- used in conjunction with adaptation of frequency and transmission range, minimizing general cost of transmission of the HELLO messages. Second solution is based on computing of optimal range. Both algorithms are based on theoretical analysis. Results show that they are energy efficient and outperform solutions of the literature. Index Terms—wireless sensor network, neighborhood discovery, HELLO message, transmission power adaptation, turnover; I.
Controlled Straight Mobility and Energy-Aware Routing in Robotic Wireless Sensor Networks
"... Abstract—Power-aware routing and controlled mobility schemes are two commonly used mechanisms for improving communications in a wireless sensor network. While the former actively consider the transmission costs when selecting the next hop on the route, the latter instruct mobile relay nodes (either ..."
Abstract
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Abstract—Power-aware routing and controlled mobility schemes are two commonly used mechanisms for improving communications in a wireless sensor network. While the former actively consider the transmission costs when selecting the next hop on the route, the latter instruct mobile relay nodes (either sensors or actuators) to pursue more promising locations so as to optimize end-to-end transmission power. Rarely, if ever, the two methodologies are exploited together for achieving relevant energy savings and prolonging network lifetime. In this paper, we introduce a hybrid routing-mobility model for the optimization of network communications. First, we find a multi-hop path between a source and its destination in an energy-efficient fashion and then we move all hop nodes in an uninterrupted, straight manner to some predefined spots with optimal energy-saving properties, fully preserving the path connectivity as they move. Such synergetic approach allowed us to: (1) seamlessly guarantee message delivery regardless of the network density (average number of neighbors per node); (2) easily incorporate any power-related optimization criterion to the routing protocol and (3) even target scenarios where both end nodes are actually disconnected from each other. Results gathered from extensive simulations argue for the introduction of the proposed hybrid framework. Index Terms—controlled mobility; power-aware routing; guar-anteed delivery; mobile sensor network I.
