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Wireless sensor networks (WSNs) have appealed to researchers due to their wide range of application areas such as target detection and tracking, environment monitoring, and tactical systems. For WSNs, various medium access control (MAC) protocols with different objectives have been proposed. Designing energy-efficient MAC protocols has a significant influence on the network lifetime in WSNs. However,...
Data collection is the fundamental and important function in wireless sensor networks. Due to the restriction of node power, how to improve the node's energy efficiency and prolong the network lifetime is an important issue in practical network deployment. In this paper, we propose the RS-LPL - Relative Synchronized Low-Power Listening which uses the relative time synchronization to improve the traditional...
Energy efficiency is a requirement when designing a MAC protocol for wireless sensor networks. To reduce needless energy use, most MAC protocols exploit the duty cycling technique, in which the radio frequently turns on and off in each operational cycle. Among those protocols, the multi-hop MAC protocol routing enhanced MAC (RMAC) enables multi-hop transmission to minimize the latency burden, which...
Low duty cycle operation is a well-known mechanism used for achieving energy efficiency in wireless sensor networks (WSNs). Nodes under this concept work only for a small percentage of time and remain largely inactive to conserve energy. S-MAC, is a popular protocol designed specifically for WSNs with low duty cycle operation. At its inception, S-MAC has been designed for low traffic loads. In this...
It is widely known that in wireless sensor networks (WSN), energy efficiency is of utmost importance. WSN need to be energy efficient but also need to provide better performance, particularly latency. A common protocol design guideline has been to trade off some performance metrics such as throughput and delay for energy. This paper presents a novel MAC (Express Energy Efficient Media Access Control)...
In wireless sensor network studies the main objective is minimizing the energy consumption so that the lifetime is maximized under the limited battery capacity constraints. In most event-driven surveillance applications, the end-to-end delay should also be minimized. In this paper we present a new EDO-MAC (energy and delay optimization Media Access Control) which reaches a good balance between energy...
Medium access control (MAC) protocols play a crucial role in energy-efficiency, latency reduction for sensor networks. Many research efforts have been made to reduce energy consumption and shorten delay in multi-hop WSNs. Although some existing MAC protocols are energy-efficient and are able to mitigate the end-to-end delivery latency, there are great potential for further improvements. In this paper,...
The media access control (MAC) protocol in wireless sensor networks provides a periodic listen/sleep state for protection from overhearing and idle listening. However, many scenarios and applications exist in which sensor nodes must send data quickly to destination nodes. This paper proposes the priority-based quality-of-service MAC (PQMAC) protocol for wireless sensor networks. We use data priority...
Energy efficiency in wireless sensor networks is one of the most crucial technologies. In this paper, we propose a simple and feasible synchronous sleep and wake mechanisms for wireless sensor networks in a small scale. Sensor nodes are divided into forwarding nodes and listening nodes. Beacon frame containing sleep command from coordinator can be forwarded to listening nodes by forwarding nodes....
We study sleep/wake scheduling for low-duty cycle sensor networks. Our work explicitly considers the effect of synchronization error. We focus on a widely used synchronization scheme and show that its synchronization error is nonnegligible and using a conservative guard time is energy wasteful. We formulate an optimization problem that aims to set the capture probability threshold for messages from...
As sensor networks mature, there will be an increasing need for re-usable, dynamically taskable software systems that support multiple concurrent applications. In this paper, we consider the problem of energy management in such systems, taking Tenet as a case study. Our work considers energy management under three new constraints: dynamic multi-hop routing and tasking, multiple concurrent applications,...
Due to the special characteristics of wireless sensor networks, traditional MAC approaches are not suitable for them. So designing MAC protocol for WSNs in a specific manner is critical to meet their intrinsic constraints. In this paper, we proposed an energy efficient MAC protocol which reduce energy consumption due to idle listening and control packet overhead. It is called W-MAC. W-MAC protocol...
In wireless sensor networks (WSNs), a duty-cycling scheme is typically applied to the medium access control (MAC) protocol to reduce energy consumption due to idle listening. However, this scheme introduces huge end-to-end latency and still suffers from a large control packet overhead. We propose a new MAC protocol with low latency and low control overhead for WSNs use (the LCO-MAC). In our protocol,...
In this paper, a novel cluster based adaptive MAC protocol for wireless sensor networks (WSN) is proposed, which is based on clustering network topology. In the proposed MAC protocol, sensor nodes can adjust the duty cycle freely according to traffic information collected by cluster head node. Meanwhile, by exploiting cross-layer routing information, sensor nodes can reduce the active period if no...
Energy efficiency of the MAC protocol is a key design factor for wireless sensor networks (WSNs). Due to the importance of the problem, a number of energy efficient MAC protocols have been developed for WSNs. Preamble-sampling based MAC protocols (e.g., B-MAC and X-MAC) have overheads due to their preambles, and are inefficient at large wakeup intervals. SCP-MAC, a very energy efficient scheduling...
Energy consumption is one of the most important design criteria in wireless sensor networks. Sensor nodes are expected to be battery-equipped. Due to their working environments, recharging or replacing batteries for each node is difficult and uneconomical. So prolonging the service lifetime of sensor nodes is a critical issue. The MAC protocol for WSNs plays a very important role in the control of...
In the wireless sensor networks (WSNs), Synchronous approaches share the schedule information that specifies the cycle of active and sleep period by the control packets. On the other hand, asynchronous approaches do not exchange the synchronization information to send or receive data. Instead, they employ preamble sampling to do that. In this paper, we compare and analyze synchronous and asynchronous...
As wireless motes are battery powered, many listen-sleep Medium Access Control (MAC) protocols have been proposed to reduce energy consumption. Security issues related to the design of these protocols have, however, largely been ignored. In this paper, we present a novel attack (the synchronization attack) on listen-sleep MAC protocols. This attack can cause 100% message loss and approximately 30%...
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