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In addition to the special field topology, a parking garage wireless sensor network restricts power consumption and data transmission time in terms of hardware equipment and service management. Without the consideration of node load or packet collision in the route of data transmission from a sensor to the sink node, the node will not only exhaust the energy but also may not transmit the data to the...
The ZIGBEE standard is one of the basal elucidation protocol proposed for wireless sensor networks. The protocol describes a flexible MAC layer layout to meet a variety of applications. Since WSN is pertinence-specific it is very termitable to provide a generic explication for all type of applications and topologies. Network inaccessibility is a sensual affair derived from the subsistence of fault...
Time Synchronized Channel Hopping protocol (TSCH) belongs to the new low-power MAC protocols included in IEEE 802.15.4e with better properties as a multihop network in industrial applications. An open issue in the standard is how to build and maintain the communication schedule. In this paper we have implemented a minimal recommended configuration and tested it against one proposed centralized scheduling...
Wireless sensor network in industrial environment (denoted IWSN) has data delivery time constraint. Due to the reactive routing and transmission collision, the data delivery time in IWSN with CSMA/CA scheme is unpredictable. In this paper, we utilize Time Division Multiple Access (denoted TDMA) MAC to avoid data collision and to bound transmission delay. Consider spatial reuse and data aggregation,...
Distributed desynchronization approaches lead to time-division multiple access (TDMA) of the shared medium without requiring a central coordinator. All such methods are based on the principle of reactive listening of periodic fire messages. The advantage of distributed desynchronization (DESYNC-TDMA) is the fact that it comprises a decentralized approach of very low complexity. It is therefore of...
In monitoring scenarios, Wireless Sensor Networks commonly transmit measurements from a large number of sensor nodes to a central data sink. This communication pattern is known as concast. Different approaches have been proposed to improve the energy-efficiency of concast and thus the lifetime of the WSN. However, energy-efficiency evaluations that are close to reality are missing. This paper systematically...
In static wireless sensor networks, it is an important research issue to achieve effectively periodic data collection and prolong the network lifetime. In this paper, a distributed k-load-balanced tree scheme is proposed to prolong the network lifetime for periodic data collection. A k-load-balanced tree is a tree that the difference of the number of children of each two non-leaf nodes in a network...
Wireless sensor networks, WSNs, are an efficient way to deal with low-rate communications in confined environments such as mines or nuclear power plants because of their simplicity of deployment and low cost. In these application domains, WSNs are used to gather data from sensor nodes towards a sink in a multi-hop convergecast structure. In this paper, we focus on a traffic-aware time slot assignment...
In this paper, we consider energy-efficient transmission schemes and data compression to minimize the energy consumption of correlated lossless data gathering in TDMA-based wireless sensor networks. An important aspect of this work is the fact that the energy considered for minimization is the energy consumed not only by the transmitter power amplifiers but also by the transmitter and receiver circuits...
Wireless sensor networks (WSNs) consist of a large number of wireless sensor nodes that organize themselves into multi-hop radio networks. With different link quality, different distance to the sink, etc., nodes in a network are not treated equally, especially in the network with high traffic. In this paper, we propose a fairness spatial reuse time division multiple access (TDMA) scheduling algorithm...
Plant automation and control are mission-critical applications and require timely and reliable data delivery, which is difficult to provide using a wireless technology. This is especially more difficult in industrial environments with harsh radio conditions. In this paper we present a dynamic and distributed topology control algorithm for Wireless Sensor Networks for use in performance critical environments...
WirelessHART is an open wireless sensor-actuator network standard for industrial process monitoring and control that requires real-time data communication between sensor and actuator devices. Salient features of a WirelessHART network include a centralized network management architecture, multi-channel TDMA transmission, redundant routes, and avoidance of spatial reuse of channels for enhanced reliability...
To solve the ineffective power consumption generated by the idle listening, conflict and control expenses in wireless sensor networks MAC layer, a novel MAC method based on the dynamic non-equal distribution slot is studied. According to the network topology and monitoring type, we analyze more about the coverage model of network nodes, Afterwards, the dynamic election mechanism that the node with...
The goal of the GINSENG project is a performance-controlled sensor network suitable for applications with specific network performance requirements, such as plant automation and health monitoring. Any such sensor network must include a deterministic MAC protocol that can meet the application's targets in areas like delivery delays and reliability. We present a description and preliminary evaluation...
In a typical wireless sensor network, one of the primary tasks of sensor nodes is to gather data and give accurate measurements of sensing environment. Thus, obtaining a fair amount of data from each sensor node plays a key role to achieve this objective. In this paper, we investigate upper bounds on network utilization of multi-hop wireless grid sensor networks with 3-4 rows. We adopt a fair-access...
We present a novel approach for Medium Access Control (MAC) protocol design based on protocol engine. Current way of designing MAC protocols for a specific application is based on two steps: First the application specifications (such as network topology and packet generation rate), the requirements for energy consumption, delay and reliability, and the resource constraints from the underlying physical...
The multi-source and single-sink (MSSS) topology is defined as the network topology in wireless sensor networks (WSNs), where all of nodes can gather, receive and transmit data to the sink. We consider the problem of finding the joint optimal scheme with consideration of physical, medium access control (MAC), and network layers to maximize the network lifetime (NL) for the MSSS topology in the energy-constrained...
Bandwidth resource allocation and scheduling has posed a challenging problem in wireless sensor networks. This paper provides a survey on the current state-of-the-art researches in this important area. Bandwidth reservation is considered in terms of time slot allocation in a pure TDMA or TDMA/CSMA based networks. We first overview different approaches for time slot allocation in a star network topology,...
TDMA-based MAC protocols are considered an energy efficient solution to prolong wireless sensor network lifetime. The topology learning and collection process, together with the used scheduling scheme, are essential parts in the design of such MAC protocols. Previous MAC and multihop scheduling protocols rely completely on CSMA to exchange topology scheduling information. However, for large or dense...
In a wireless sensor network, given a routing tree for data gathering from individual nodes to the sink node, this paper presents a simple, distributed algorithm for assigning time slot to each node for conflict-free communication, such that the maximum latency in data gathering at the sink is minimized. It requires just a one-time computation during the initialisation of the network provided the...
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