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30
Sensor Networks with Mobile Agents
- in Proc. 2003 Military Communications Intl Symp
, 2003
"... An architecture for large scale low power sensor network is pro-posed. Referred to as sensor networh with mobile agents (SENMA). SENMA exploit node redundancies by introducing mobile agents that communicate opportunistically with a largefreld of sensors. The addition of mobile agents shifIs computat ..."
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Cited by 114 (37 self)
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An architecture for large scale low power sensor network is pro-posed. Referred to as sensor networh with mobile agents (SENMA). SENMA exploit node redundancies by introducing mobile agents that communicate opportunistically with a largefreld of sensors. The addition of mobile agents shifIs computationally intensive task awayfrom primitive sensors to more powerful mobile agents, which enables energy effcient operations under severely limited power constraints. An opportunistic ALOHA random access cou-pled with a direct sequence spread spectrum physical layer is pro-posed. A comparison ofSENMA with apor ad hocsensor network shows a substantial gain in energy efficiency.
Scheduling sleeping nodes in high density cluster-based sensor networks
- In ACM/Kluwer Mobile Networks and Applications, Issue: Volume 10, Number 6 (pp. 825–835
, 2005
"... Scheduling sleeping nodes in high density cluster-based sensor networks ..."
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Cited by 29 (3 self)
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Scheduling sleeping nodes in high density cluster-based sensor networks
Optimum Transmission Range for Wireless Ad Hoc Networks
- In IEEE Wireless Communications and Networking Conference
, 2004
"... The transmission range that achieves the most economical use of energy in wireless ad hoc networks is studied under homogeneous node distribution. By assuming the knowledge of node location, we first proposed a transmission strategy to ensure the progress of data packets toward their final destinati ..."
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Cited by 23 (3 self)
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The transmission range that achieves the most economical use of energy in wireless ad hoc networks is studied under homogeneous node distribution. By assuming the knowledge of node location, we first proposed a transmission strategy to ensure the progress of data packets toward their final destinations. Then the average packet progress for a transmission range universal for all nodes is derived, which is accordingly used to determine the optimal transmission range that gives the maximum efficiency of energy consumption. Different from some previous work, our analysis does not make the assumption of large nodal density in the wireless ad hoc networks studied. Numerical and simulation results are presented to examine our analysis for wireless ad hoc networks.
Balancedenergy sleep scheduling scheme for high density cluster-based sensor networks
- Elsevier Computer Communications Journal, Special Issue on ASWN
, 2004
"... Abstract — In order to conserve battery power in very dense sensor networks, some sensor nodes may be put into the sleep state while other sensor nodes remain active for the sensing and communication tasks. However, determining which of the sensor nodes should be put into the sleep state is non-triv ..."
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Cited by 20 (3 self)
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Abstract — In order to conserve battery power in very dense sensor networks, some sensor nodes may be put into the sleep state while other sensor nodes remain active for the sensing and communication tasks. However, determining which of the sensor nodes should be put into the sleep state is non-trivial. As the goal of allowing nodes to sleep is to extend network lifetime, we propose and analyze a Balanced-energy Scheduling (BS) scheme in the context of cluster-based sensor networks. The BS scheme aims to evenly distribute the energy load of the sensing and communication tasks among all the nodes in the cluster, thereby extending the time until the cluster can no longer provide adequate sensing coverage. Two related sleep scheduling schemes, the Distance-based Scheduling (DS) scheme and the Randomized Scheduling (RS) scheme are also studied in terms of the coefficient of variation of their energy consumption. Analytical and simulation results are presented to evaluate the proposed BS scheme. It is shown that the BS scheme extends the cluster’s overall network lifetime significantly while maintaining a similar sensing coverage compared with the DS and the RS schemes for sensor clusters. I.
Sensor Networks with Mobile Access: Energy and Capacity Considerations
- IEEE Trans. Comm
, 2006
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Optimal transmission range for wireless ad hoc networks based on energy efficiency
- IEEE Transactions on Communications
"... Abstract The transmission range that achieves the most economical use of energy in wireless ad hoc networks is studied for uniformly distributed network nodes. By assuming the existence of forwarding neighbors and the knowledge of their locations, the average per-hop packet progress for a transmiss ..."
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Cited by 9 (0 self)
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Abstract The transmission range that achieves the most economical use of energy in wireless ad hoc networks is studied for uniformly distributed network nodes. By assuming the existence of forwarding neighbors and the knowledge of their locations, the average per-hop packet progress for a transmission range that is universal for all nodes is derived. This progress is then used to identify the optimal per-hop transmission range that gives the maximal energy efficiency. Equipped with this analytical result, the relation between the most energy-economical transmission range and the node density, as well as the path loss exponent, is numerically investigated. It is observed that when the path loss exponent is high (such as four), the optimal transmission ranges are almost identical over the range of node densities that we studied. However, when the path loss exponent is only two, the optimal transmission range decreases noticeably as the node density increases. Simulation results also confirm the optimality of the per-hop transmission range that we found analytically. Index Terms: wireless ad hoc networks; energy efficiency; optimal transmission range Article: I. INTRODUCTION The research on wireless ad hoc networks has experienced a rapid growth over the last few years. Unique properties of ad hoc networks, such as operation without pre-existing infrastructure, fast deployment, and selfconfiguration, make them suitable for communication in tactical operations, search and rescue missions, and home networking. While most studies in this area have concentrated on the design of routing protocols, medium access control protocols, and security issues, we investigate the efficiency of energy consumption in wireless ad hoc networks in this work. Due to their portability and fast-deployment in potentially harsh scenarios, nodes in ad hoc networks are usually powered by batteries with finite capacity. It is always desirable to extend the lifetime of ad hoc network nodes without sacrificing their functionality. Thus, the study of energy-efficient mechanisms is of importance. In wireless ad hoc networks, energy consumption at each node is mainly due to system operation, data processing, and wireless transmission and reception. While there are studies on increasing battery capacity and reducing energy consumption of system operation and data processing, energy consumption economy of radio transceivers has not received as much attention. Such a study is also quite essential for an energy-efficient system design
On the Forwarding Area of Contention-Based Geographic Forwarding for Ad Hoc and Sensor Networks
- in Proc. SECON
, 2005
"... Abstract — Contention-based Geographic Forwarding (CGF) is a state-free communication paradigm for information delivery in multihop ad hoc and sensor networks. A priori selection of the forwarding area impacts its overall network performance and the design of the CGF protocol as well. In this work, ..."
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Cited by 8 (1 self)
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Abstract — Contention-based Geographic Forwarding (CGF) is a state-free communication paradigm for information delivery in multihop ad hoc and sensor networks. A priori selection of the forwarding area impacts its overall network performance and the design of the CGF protocol as well. In this work, we study the fundamental problem of defining the forwarding area apriorifor CGF and determine its impact on the performance. We model CGF without void (i.e., absence of a next-hop node in the forwarding area) handling as a 3-step forwarding strategy. Based on this model and given a random distribution of network nodes, we develop a general mathematical analysis technique to evaluate the performance of CGF with different forwarding areas, in terms of the performance metric average single-hop packet progress. Further, we introduce two state-free void handling schemes, i.e., active exploration and passive participation, for CGF and study their performance in depth. Our theoretical analysis and numerically evaluated results, validated by extensive simulations, provide a guideline regarding the selection of specific forwarding areas for the design of a practical CGF protocol. It also serves as a general performance evaluation framework for the existing CGF protocols. I.
Energy-delay bounds analysis in wireless multi-hop networks with unreliable radio links
- ARES / INRIA, Tech. Rep
"... with unreliable radio links ..."
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Multi-hop/Direct Forwarding (MDF) for Static Wireless Sensor Networks
- ACM Transactions on Sensor Networks
, 2009
"... Sensor Networks, 5(4), p. 1-25. ..."
Micro Base Stations in Load Constrained Cellular Mobile Radio Networks
"... Abstract—Future cellular mobile radio networks will exhibit a much more dense base station deployment than 2nd or 3rd generation communications systems, particularly with regard to traffic coverage. Hence, a significant increase in power consumption of cellular networks can be expected. In order to ..."
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Cited by 4 (0 self)
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Abstract—Future cellular mobile radio networks will exhibit a much more dense base station deployment than 2nd or 3rd generation communications systems, particularly with regard to traffic coverage. Hence, a significant increase in power consumption of cellular networks can be expected. In order to counter this trend, energy efficiency of such networks should be increased considerably. Concerning energy efficiency, utilizing micro base stations with their smaller power consumption capabilities appear promising. In this paper we study various homogeneous and heterogeneous deployment strategies incorporating micro base stations with focus on energy efficiency represented by power consumption and throughput. Further, we deal with the impact of different load scenarios on energy efficiency of the various network topologies in more detail. I.
