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In this paper Dynamic Sleep Scheduling (DSS) for Minimizing Delay in Wireless Sensor Network is proposed. To reduce delay, DSS identifies nodes for different sleep/wake according to their traffic load at two levels: a) Nodes with different sleep/wake schedule requirement according to their different traffic load based on their topological importance in the network. b) Nodes with different sleep/wake...
We consider surveillance applications in which sensors are deployed in large numbers to improve coverage fidelity. Previous research has studied how to select active sensor covers (subsets of nodes that cover the field) to efficiently exploit redundant node deployment and tolerate unexpected node failures. Little attention was given to studying the tradeoff between fault tolerance and energy efficiency...
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...
In this paper, we present a novel energy consumption analysis of the flow-specific Cooperative Wireless Sensor Network Medium Access Control (CWS-MAC) protocol utilizing a nine-state radio energy model that includes both steady state and transient state energy consumption behavior. CWS-MAC is a traffic-adaptive, energy-efficient medium access scheme that has been shown in the literature to outperform...
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)...
Today's platforms offer ubiquitous network connectivity through one or more communication interfaces and while the communication devices consume a small portion of the overall platform power the impact of network connectivity and individual packet processing on the overall platform energy consumption is significant, due to the non-deterministic characteristics of network traffic. In this paper, we...
Recently, considerable research efforts have been devoted to Delay/disruption Tolerant Network (DTN) in order to enable communications between disconnected network entities. In this paper, we focus on power management for DTN, and propose two asynchronous clock based power saving protocols with distributed adaptive sleep scheduling protocols. The proposed protocols allow different levels of power...
Current wireless sensor network applications face challenging power constraints that demand low duty cycles. In this paper, we propose an energy-efficient, flow-specific medium access scheme that is capable of achieving low duty cycles while taking advantage of the performance improvements available through a flow-specific medium access approach. The scheme is based on an adaptive sleep and wake cycle...
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,...
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 this paper, we propose a novel MAC protocol (RP-MAC) with a receiver preamble for wireless sensor networks. Energy efficiency is the most critical and fundamental factor in wireless sensor networks, because sensor nodes rely on the limited power source. For energy efficiency, the existing MAC protocols such as B-MAC and X-MAC change the active and sleep states periodically with a duty cycle. Even...
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,...
According to the problem of long latency which caused by periodical sleep of the MAC protocol for existing competitive neural network, the paper proposes a short-latency MAC protocol based on TMAC multi-hop reservation, called MR-MAC. The protocol books some nodes in the whole communication link to decrease or eliminate the problem of long latency which caused by the periodical sleep of the node....
Wireless sensor networks have been studied with two typical applications called event-driven and periodic monitoring applications. Although these applications have different core requirements, they have the same low latency requirement for real-world operation. However, the main issue of the protocol in wireless sensor networks has focused on energy efficiency, so there has been a lack of consideration...
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...
This paper proposes LMAC (latency MAC) protocol for wireless sensor networks. We investigate the idle listening problem and try to avoid it by sacrificing latency. We examine the latency constraint in wireless sensor networks and study the tradeoff between extra latency and energy efficiency. In the process of trading latency for energy efficiency, there are many restrictions. Thus, we study and analyze...
Energy efficiency is one of the most important requirements for wireless sensor networks. We present EMAC, an energy efficient MAC protocol for low-traffic delay-tolerant wireless sensor networks. EMAC uses asynchronous distributed transmission scheduling to achieve high energy efficiency. It was developed following strict design guides and keeping focus on meeting all requirements of MAC protocols...
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...
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