Analysis Of Wireless Personal Area Networks

Abstract: 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 Wifi (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 where the hosting of more number of heterogeneous networks, the shortage of ISM bands happens.
The communication range of the wireless personal area network is within 10 meters.
The standard for wireless personal area networks (WPANs) is IEEE 802.15. The two significant technologies in WPANs are Bluetooth and Infrared data association. The operating frequency of WPANs is 2.4 GHz. The main target of WPAN is to provide a faultless connection among the interconnected devices. In the WPAN each and every device capable to plug into any other device and easily communicate with other devices. The other significant feature of every device is capability to lock out other devices selectively, so that it avoids the interference and permits the unauthorized persons. The important technology of wireless personal area network is Bluetooth and Zigbee. Bluetooth is a short range communication wireless technology, which is used to transfer the data. The communication range of Bluetooth is 10 meters. Bluetooth devices are pointing devices, printers connected to personal digital assistants, cell phones and computers are connected
Contradictory coexistence of ZigBee with Wifi
Both production and research communities have been studied the interference between the Wifi and Zigbee. If there is less traffic in Wifi, Zigbee is known to suffer a smaller quantity conflict with Wifi and there is packet loss [4] [5]. On the other hand, under restrained to high Wifi traffic, the performance of the Zigbee is severely degraded.
Pollin et al. [7] says that wifi may interfere the transmission of Zigbee even Wifi and Zigbee are positioned close to each other. Due to the propagation of Wifi devices and high data rate applications the quantity of Wifi traffic in a usual home or enterprise environment will keep growing, thus strictly disturbing the trustworthiness of ZigBee.
However, the Zigbee and Wifi interfere with each other it focuses only the low duty-cycle applications with low channel occupancy [8]. In addition to that, there is a high transmitting power level for Wifi so that the Wifi effortlessly target the Zigbee nodes and dominate the interference of Zigbee. When Wifi is positioned with Zigbee there is no packet loss in Wifi. Also, Zigbee may also agitate the 802.11 packet decoding, but only with drenched traffic, or without MAC-layer