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Enabling Coexistence of ZigBee and WiFi

Sunil Jacob, Priyanka Ravi. Published in Wireless.

Communications on Applied Electronics
Year of Publication: 2015
Publisher: Foundation of Computer Science (FCS), NY, USA
Authors: Sunil Jacob, Priyanka Ravi
10.5120/cae2015651788

Sunil Jacob and Priyanka Ravi. Article: Enabling Coexistence of ZigBee and WiFi. Communications on Applied Electronics 2(6):28-34, August 2015. Published by Foundation of Computer Science (FCS), NY, USA. BibTeX

@article{key:article,
	author = {Sunil Jacob and Priyanka Ravi},
	title = {Article: Enabling Coexistence of ZigBee and WiFi},
	journal = {Communications on Applied Electronics},
	year = {2015},
	volume = {2},
	number = {6},
	pages = {28-34},
	month = {August},
	note = {Published by Foundation of Computer Science (FCS), NY, USA}
}

Abstract

Spectrum scarcity is known to be main obstacle to scaling of wireless network capacity. Spectrum sharing is a solution to this problem. The unlicensed ISM band is getting crowded by WLAN and WPAN users and devices. Spectrum sharing within the devices of same network is not a problem. But coexistence of WLAN and WPAN (eg: WiFi and ZigBee) is a challenging problem. Spectrum sharing among these networks will surely improve spectrum utilization .WiFi and ZigBee uses 2.4 GHz ISM band. Different methods had been adopted to improve the coexistence of ZigBee and WiFi .Some methods are discussed here. Each of them has some disadvantages .To tackle these challenges a new system called WiseBee is used which help in the coexistence of ZigBee and WiFi. It uses a single antenna sink without changing WiFi and ZigBee design .The sink works in following steps: The signal from the RF front end will be processed firstly .If the WiFi interference is detected, system will process the WiFi decoding and use decoded data for accurate channel coefficient estimation .After that, the WiFi signal is removed by interference cancellation module, where the residual signal can be used for ZigBee decoding. Then we find out a channel for ZigBee transmission.

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Keywords

802.11, 802.15.4, interference, coexistence, spectrum sharing, heterogeneous networks, WiFi, ZigBee