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22
A Survey of Practical Issues in Underwater Networks
- In Proc. ACM WUWNet
, 2006
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Worldsens: Development and Prototyping Tools for Application Specific Wireless Sensors Networks ABSTRACT
"... In this paper we present Worldsens, an integrated environment for development and rapid prototyping of wireless sensor network applications. Our environment relies on software simulation to help the designer during the whole development process. The refinement is done starting from the high level de ..."
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Cited by 49 (9 self)
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In this paper we present Worldsens, an integrated environment for development and rapid prototyping of wireless sensor network applications. Our environment relies on software simulation to help the designer during the whole development process. The refinement is done starting from the high level design choices down to the target code implementation, debug and performance analysis. In the early stages of the design, high level parameters, like for example the node sleep and activity periods, can be tuned using WS-Net, an event driven wireless network simulator. WSNet uses models for applications, protocols and radio medium communication with a parameterized accuracy. The second step of the sensor network application design takes place after the hardware implementation choices. This second step relies on the WSim cycle accurate hardware platform simulator. WSim is used to debug the application using the real target binary code. Precise performance evaluation, including real-time analysis at the interrupt level, are made possible at this low simulation level. WSim can be connected to WSNet, in place of the application and protocol models used during the high level simulation to achieve a full distributed application simulation. WSNet and WSNet+WSim allow a continuous refinement from high level estimations down to low level real-time validation. We illustrate the complete application design process using a real life demonstrator that implements a hello protocol for dynamic neighborhood discovery in a wireless sensor network environment.
Robcast: A singlehop reliable broadcast protocol for wsns. ADSN
, 2007
"... Empirical studies show that wireless sensor networks (WSNs) are extremely prone to the hidden terminal problem. As much as 50 % of packet losses have been blamed to the hidden terminal problem under bursty communication. Current protocols use RTS-CTS handshakes to avoid collisions and alleviate the ..."
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Cited by 4 (2 self)
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Empirical studies show that wireless sensor networks (WSNs) are extremely prone to the hidden terminal problem. As much as 50 % of packet losses have been blamed to the hidden terminal problem under bursty communication. Current protocols use RTS-CTS handshakes to avoid collisions and alleviate the hidden terminal problem for unicast communication. However, it is not possible to directly or efficiently generalize this approach to broadcast communication. Motivated by this problem, we propose Robcast, a round-based self-stabilizing protocol for reliably broadcasting data using receiver-side collision detection feedback. The singlehop level reliability of Robcast can form a building block on which future applications and protocols can be designed for WSNs. 1
Analysis and simulation of the deep sea acoustic channel for sensor networks
, 2009
"... This thesis is the result of my own independent work, except where stated otherwise. All other sources are acknowledged by explicit references. This work has not previously been accepted in substance for any degree and is not concurrently submitted in candidature for any degree. This thesis is being ..."
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Cited by 3 (2 self)
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This thesis is the result of my own independent work, except where stated otherwise. All other sources are acknowledged by explicit references. This work has not previously been accepted in substance for any degree and is not concurrently submitted in candidature for any degree. This thesis is being submitted in fulfillment of the requirements for the degree
Froms: A Failure Tolerant and Mobility Enabled Multicast Routing Paradigm with Reinforcement Learning for WSNs
, 2009
"... A growing class of wireless sensor network (WSN) applications require the use of sensed data inside the network at multiple, possibly mobile base stations. Standard WSN routing techniques that move data from multiple sources to a single, fixed base station are not applicable, motivating new solution ..."
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Cited by 3 (1 self)
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A growing class of wireless sensor network (WSN) applications require the use of sensed data inside the network at multiple, possibly mobile base stations. Standard WSN routing techniques that move data from multiple sources to a single, fixed base station are not applicable, motivating new solutions that efficiently achieve multicast. This paper explores in depth the requirements of this set of application scenarios and proposes, Froms, a machine learning-based approach. The primary benefits are the flexibility to optimize routing on a variety of properties such as route length, battery levels, etc., ease of recovery after node failures, and native support for sink mobility. We provide extensive simulation results supporting these claims, clearly showing the benefits of Froms in terms of low routing overhead, extended network lifetimes, and other key metrics for the WSN environment.
Medium access control facing the reality of WSN deployments
- ACM SIGCOMM Computer Communication Review
, 2009
"... This article is an editorial note submitted to CCR. It has NOT been peer reviewed. The author takes full responsibility for this article’s technical content. Comments can be posted through CCR Online. Although research on algorithms and communication pro-tocols in Wireless Sensor Networks (WSN) has ..."
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Cited by 2 (0 self)
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This article is an editorial note submitted to CCR. It has NOT been peer reviewed. The author takes full responsibility for this article’s technical content. Comments can be posted through CCR Online. Although research on algorithms and communication pro-tocols in Wireless Sensor Networks (WSN) has yielded a tremendous effort so far, most of these protocols are hardly used in real deployments nowadays. Several reasons have been put forward in recent publications. In this paper, we further investigate this trend from a Medium Access Control (MAC) perspective by analyzing both the reasons behind successful deployments and the characteristics of the MAC layers proposed in the literature. The effort allocated to de-velop suitable protocols from scratch every new deployment could however be minimized by using already existing con-tributions which provide code reuse and adaptive protocols. Though we advocate their use for nowadays deployments, we have identified several shortcomings in foreseen scenarios for which we provide guidelines for future researches.
The Node Reliability Approach to Broadcasting in Manets: Raising Reliability With Low End-to-End Delay
"... This paper evaluates how well a signicant number of broadcasting protocols for MANETs behave when under a realistic scenario of momentary failures and topology changes, which is represented by an omission fault model. Reliable protocols which use additional mechanisms to ensure higher delivery rate ..."
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This paper evaluates how well a signicant number of broadcasting protocols for MANETs behave when under a realistic scenario of momentary failures and topology changes, which is represented by an omission fault model. Reliable protocols which use additional mechanisms to ensure higher delivery rates beyond best-effort guarantees have been proposed, but they exhibit unacceptably high end-to-end delays. As a result of the study conducted, a new mechanism that helps to enhance the reliability of deterministic broadcasting protocols is proposed. The mechanism allows for scalability, and is capable of ensuring good delivery rates (in spite of failures) while maintaining lower end-to-end delays. Simulation results demonstrate the efcacy of the mechanism. 1.
© IJCSI PUBLICATION 2011
"... In this fourth edition of 2011, we bring forward issues from various dynamic computer science ..."
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In this fourth edition of 2011, we bring forward issues from various dynamic computer science
Cross-Layer Design For Energy-Efficient In Wireless Underwater Communication: Acoustic Frequency IDentification Case Study
"... Thanks to the recent developments on communication techniques, micro-technology and on digital electronics, Underwater Wireless Sensor Networks (UWSNs) are being employed in several types of underwater applications such as wireless identification named Acoustic Frequency Identification (AFID)[1][2]. ..."
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Thanks to the recent developments on communication techniques, micro-technology and on digital electronics, Underwater Wireless Sensor Networks (UWSNs) are being employed in several types of underwater applications such as wireless identification named Acoustic Frequency Identification (AFID)[1][2]. In this research, we are trying to adapt concepts of wireless acoustic identification to the difficult underwater environment with its hard constraints especially absence of high bandwidth communication (no radio).So, there is a critical parameter in UWSN making challenge because it determines how longer sensor nodes and the entire networks would remain functional. However, in these types of Networks, node’s battery presents a limited energy resource and network lifetime is related to the energy consumption by a node. Thus, in this paper we will propose some contributions and cross-layer design to prolong the AFID network lifetime.
