When deploying both WiFi and ZigBee in the same environments, careful planning must be performed to make sure that they dont interfere with each other.ZigBee channel 26 is usually relatively unaffected by WiFi, but many ZigBee devices do not support it.
To reduce the cost of these networks, they were designed to work in the crowded and overloaded 2.4 GHz ISM commercial band with different technologies such as IEEE802.11 known as WiFi. The coexistence of different wireless technologies causes interference and packets collision, then packet retransmission. Such technologies usually operate in proximity and have to co-exist with each other. For example, WiFi uses the same frequency band that is used by ZigBee, however, WiFi uses higher power levels compared with ZigBee. When the ZigBee and WiFi use the channel at the same time, an interference problem appears which causes loss of the data packets being transmitted. This will result in retransmission in both WiFi and ZigBee until a successful transmission is achieved. Does Zigbee Interfere With Wifi Free Medium ForMoreover, ZigBee would wait longer to get free medium for transmission, and with the expected packet loss and retransmission, faster draining of the sensor battery is expected.In this paper we studied the mutual impact of WiFi interference on ZigBee channels by using QualNet Simulator and computed the Packet Delivery Rate (PDR) for bothZigBee and WiFi nodes. The obtained results show that ZigBee has little impact on WiFi Packets, and WiFi affects ZigBee packets with different degrees based on the traffic intensity and number of nodes. Does Zigbee Interfere With Wifi For Free Content UploadedDiscover the worlds research 17 million members 135 million publications 700k research projects Join for free Content uploaded by Reem Jaradat Author content All content in this area was uploaded by Reem Jaradat on Jun 09, 2015 Content may be subject to copyright. There are different wireless technologies that share the sa me 2.4 GHz frequency band. Suc h technologies usually operate in proximity and hav e to co-exist with each other. For exam ple, WiFi uses the same frequency band that is used by ZigBe e, however, WiFi uses higher power le vels compared with ZigBee. When the ZigBee and WiFi use the channel at the same time, an i nterference pr oblem appears which causes loss of the data packets being transmitted. Th is, in turn, causes delay and mitig ation in the delivery ratio for bot h technologies. ![]() Keywords: ZigBee, WiFi, co-exist ence, interference. Introduction The continuous emerging of wirele ss technologies, in addition to the increasing demands for mobile applications, combined with the wide spread of ne w humancomputer interaction models, such as ubiquitous computing, paved the way for the emergence of new networking frameworks and new applications. Nowadays, users are equipped with more powerful, small, wireless mobile devices such as mobile phones, PDAs and sensors, these devices generate substan tial amount of various data. Moreover, to support the new generation of situationaware applications, there is a real need for new networking paradigms to support the exchange of information between these devices. Personal mobile devices are typically of a small size and with limited processing, communications and energy capabilities. Thus, the new networks should s upport low power and low data rate transmissions. Several technologies were developed to satisfy the a bove mentioned prospects. A successful example of these technologies is IEEE802.15.4 networks, which is k nown as ZigBee networks. ZigBee is designed to be cost effective to guarantee a successful commercial spr ead. To reduce the cost of these networks, they were designed to work in the crowded and overloaded 2.4 GHz ISM commercial band with different technologies such as IEEE802.11 known as WiFi. The coexistence of different wireless technologies causes interference and packets collision, then packet retransmission.
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