期刊名称：International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)
印刷版ISSN：2278-1323
出版年度：2014
卷号：3
期号：9
页码：2967-2972
出版社：Shri Pannalal Research Institute of Technolgy
摘要：Wireless technologies have experienced an enormous growth in the last decades. The wireless personal area networks (WPANs) and wireless local area networks (WPANs) are heterogeneous networks which are used in different applications. Two networks, called Wi-Fi (IEEE 802.11 WLAN) and ZigBee (IEEE 802.15.4 WPAN), which operates in 2.4 GHz frequency. Spectrum sharing is an effective technique which is used to enhance spectrum utilization. However the coexistence and Interoperability is a critical problem in the case of heterogeneous networks. These critical problems will lead to occurrence of the crowd in the spectrum. Because of these reasons in which hosting of more number of heterogeneous networks, the shortage of ISM bands happens. The packet loss and less throughput problems happen in the network due to the insufficiency of the Wi-Fi channels in the ISM band. In this survey, different coexistence mechanisms are suggested to reduce the interference. Scheduling of frequency is one of the methods which are utilized to tackle the trouble of Zigbee Wi-Fi coexistence. However, this frequency planning method does not overcome the problem of burst collisions. This method only responds after the collision had occurred on the network. To develop the wireless personal area networks and wireless local area networks coexistence, the spectrum-survey technique is utilized which regulates the power level of transmission. This method is applicable for static networks and accomplishes the long-term throughput between the heterogeneous networks. But the drawback in this method is short-term performance factors such as collision rate, end-to-end delay is not considered. Specifically, in this survey different coexistence mechanisms are analyzed that how to reduce the interference.
关键词：WLAN; WPAN; Industrial; Scientific and Medical ; (ISM) band; Spectrum sharing
