On Enhancing Technology Coexistence in the IoT Era: ZigBee and 802.11 Case

Abstract

ZigBee is often chosen as a technology to connect things because of characteristics, such as network resilience, interoperability, and low power consumption. In addition, Zigbee Pro, with its Green Power feature, allows low-power networking capable of supporting more than 64 000 devices on a single network, making it an excellent choice to connect things. However, in recent years, we have witnessed the proliferation of smart devices using either 802.11 or ZigBee technologies, which operate in the same frequency band. Proposing and developing techniques that may improve the fair operation and performance of these technologies in coexistence scenarios have been a major concern in industry and academia. In this paper, we propose the use of traffic prioritization for ZigBee nodes in order to improve their performance when coexisting with IEEE 802.11 nodes. We develop an analytical model based on Markov chains, which captures the behavior of channel access mechanisms for both 802.11 nodes and different ZigBee priority class nodes. Based on extensive simulations, we validate the accuracy of the proposed model, and demonstrate how traffic prioritization of ZigBee nodes effectively improves their performance when coexisting with 802.11 nodes. We also demonstrate that this improvement comes at the cost of negligible degradation in the performance of the 802.11 nodes.INDEX TERMS Internet of things, ZigBee, WiFi, cross technology interference.

Assessing the Performance of ZigBee RF Protocol using Path loss models for IoT Application

“…The XBee Shield is used to connect an XBee to a computer. We will be able to set up XBee and establish connections between RF modules with the aid of these tools [7]. Connect the XBee modules to the XBee shields and use the X-CTU software to connect to the computer.…”

Simulation of Infocommunications Process Development Scenarios in Wireless Centralized Network Cluster

“…Так само як RFID, технологія NFC є вузькоспеціалізованою і не придатна для активного інформаційного трафіку. Водночас, заснована на протоколі IEEE 802.15.4 технологія ZigBee [13]- [16] дозволяє створювати енергоефективні бездротові мережі високої ємності для низькошвидкісного, проте повноцінного інформаційного обміну. На додачу, створеним за технологією ZigBee мережам ІоТ властива динамічна топологія та правило гарантованого отримання пакетів даних із захистом процесу їх передавання за алгоритмом AES.…”

Improving Route Selections in ZigBee Wireless Sensor Networks

“…The IEEE 802.15.4 physical layer specifications enable operation in the unlicensed frequency spectrum at 2.4 GHz, specifying 16 channels of 2 MHz with carriers spaced by 5 MHz. As will be discussed in this paper, because WiFi IEEE 802.11 networks also operate in this band, interference and packet losses may occur in ZigBee communications when both networks operate in overlapping channels [8,33,34].…”

“…where the reader should note that link costs are quantized into three bits. It should be highlighted that the probabilities of successful transmission in links, and therefore, the various link costs, vary not only because of the various distances between nodes but because of hidden node problems [31,32] and external interference [8,33,34]. For instance, node 4 in Figure 1 may generate a higher traffic load than node 5, which means that the probability that node 1 successfully receives a packet from node 3 is lower than the probability that node 2 successfully receives node 3's packet, which means that c 3,1 > c 3,2 .…”