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WSNs are composed of sensors that collect, process, and send data to a sink. To communicate, sensors use a shared medium. Thus, a robust MAC layer protocol has to be implemented for transmission management. This paper presents a QoS based WSNs MAC protocol that ensures service differentiation and less energy consumption. It is based on a duty-cycle approach that combines TDMA and CSMA/CA schemes....
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...
Wireless sensor networks are widely used for healthcare applications. A new field known as wireless body area networks (WBAN) has emerged to support this area. An energy efficient medium access control (MAC) protocol can increase the performance of such a network. The major requirements for a WBAN MAC protocol are energy efficiency and low delay. In this paper, we propose a MAC protocol for WBAN using...
TDMA has been proposed as a MAC protocol for wireless sensor networks (WSNs) due to its efficiency in high WSN load. However, TDMA is plagued with shortcomings; we present modifications to TDMA that will allow for the same efficiency of TDMA, while allowing the network to conserve energy during times of low load (when there is no activity being detected). Recognizing that aggregation plays an essential...
A time division multiple access (TDMA) scheduling protocol is proposed for solving the inter-cluster interference of medium access control (MAC) in cluster-based wireless sensor networks (WSN). Through each cluster-head snooping into the neighbor nodes' networking packets and creating the TDMA schedule based on these packets, the protocol can avoid inter-cluster interference. The protocol is implemented...
We designed RRMAC, a time division multiple access (TDMA) scheme guaranteeing hard real-time and reliable communication in a multi-hop convergecast network. We performed experiments to compare the performance of RRMAC and IEEE 802.15.4 and showed the advantages of RRMAC is WSN applications which require highly reliable real-time data transmission.
The single-source and single-sink (SSSS) topology, in wireless sensor networks, is defined as the network topology, where every node behaves as a relaying node except the single source and the single sink. We consider the problem of finding a joint optimal scheme with consideration of physical, medium access control (MAC), and network layers to maximize the network lifetime (NL) for the SSSS topology...
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