Timing Structure Mechanism of Wireless Sensor Network MAC layer for Monitoring Applications

Abstract

This paper aims at designing a Timing Structure Mechanism (TSM) for Wireless Sensor Network (WSN) MAC, with specifying its respective logical topology, especially suitable to the monitoring applications, differentiated and characterized from the existing time bounding strategies, paving for a good performance channel access mechanism. The work proposed in this paper is based on classifying the monitoring applications so as to designing efficient setup and benefiting from the node's capabilities in dividing the network into sub-networks. By evaluating TSM against a cluster-tree IEEE802.15.4 in the two cases of one channel and multi-channel clusters, the simulation results showed that with varying the area, the TSM performs better than the two cases of IEEE802.15.4 in terms of lifetime, end-to-end delay, loss percentage by on average 103.44% and 61.84%, 96.59% and 95.37%, and 88.59% and 87.52%, respectively. Also, in case of increasing the node density, TSM is better in terms of the same parameters by on average 446.58% and 356.05%, 98.04% and 95.62%, and 77.62% and 75.2%, respectively.

Designing a Channel Access Mechanism for Wireless Sensor Network

“…The superframe has active/inactive portions, a CSMA-based Contention Access Period (CAP), and an optional reservationbased Guaranteed Time Slot (GTS) scheme intended to support devices requiring dedicated bandwidth or low latency transmission through a Contention-Free Period (CFP). In our previous work [11], the channel time bounding mechanism of the proposed MAC is implemented and evaluated against the IEEE 802.15.4 MAC superframe structure in a complete network form using the same contention-based channel access mechanism used in the standard and illustrated in the next section. In this paper, a design for the proposed MAC contention-based channel access mechanism is implemented and evaluated against the standard.…”

“…Figure 12 presents examples for the employed topology for each protocol; the topology of the slotted CSMA/CA is the logical topology for it which is the cluster-tree. The proposed CAM topology is constructed by dividing the network into subnetworks, each one works on a different frequency channel, some members are BS-neighbors, and its members work on our previously proposed TSM [11]. The time slot equals the time of one transmission, and no interaction between the sub-NWs is assumed.…”

“…The MAC layer design intended by the work proposed in this paper is based on the physical layer of the IEEE802.15.4 standard [8][9][10] and composed of two techniques, a timing structure mechanism (TSM), proposed by our previous work [11], including the setup of the logical topology by dividing the network into subnetworks (sub-NWs) using multichannels and identifying the time structure of the sub-NW members' work and the contention-based CAM proposed in this paper. The main TSM idea was to construct a receive schedule which makes, at a time, only one node from a group of nodes (sub-NW) listen to the channel, and each node takes its turn successively to listen for a small period.…”

Qos Categories Activeness-Aware Adaptive Edca Algorithm for Dense Iot Networks

“…In traditional EDCA, IEEE sets the CW size to a static lower value for sensitive delay services, which mean a dramatic degradation of the performance in case of dense networks due to higher rates of collision and retransmission packets; this led to higher rates of delay [10]. In [11], the authors consider three possible traffic loads, their proposed scheme make an enhancement in terms of global throughput (overall network throughput) and retransmissions but degradation in terms of voice and video throughput.…”

A Novel Wireless Sensor Network Architecture Based on Cloud Computing and Big Data

“…It is also responsible for preserving all the data collected by the sensor network nodes [7], and transferring the data to web applications by their business logics, so as to ensure the intelligent access of the users. The cloud centre is mainly made up of four parts: virtual cloud, cloud processing and storage, web application and cloud management.…”