COEXISTENCE OF STANDARDIZED WIRELESS SYSTEMS IN THE 2.4 GHZ-ISM-BAND

Wireless systems continue to rapidly gain popularity. This is extremely true for data networks in the local and personal area, which are called WLAN and WPAN, respectively. However, most of those systems are working in the license-free industrial scientific medical (ISM) frequency bands, where neither resource planning nor bandwidth allocation can be guaranteed. To date, the most widespread systems in the 2.4 GHz ISM band are IEEE802.11 and Bluetooth, with ZigBee and IEEE802.15.4 as upcoming standards for short range wireless networks. In this paper we examine the mutual effects of these different communication standards. Measurements are performed with real-life equipment, in order to quantify coexistence issues.

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Experimental Validation of a Coexistence Model of IEEE 802.15.4 and IEEE 802.11b/g Networks

International Journal of Distributed Sensor Networks ◽

10.1155/2010/581081 ◽

2010 ◽

Vol 6 (1) ◽

pp. 581081 ◽

Cited By ~ 9

Author(s):

Wei Yuan ◽

Xiangyu Wang ◽

Jean-Paul M. G. Linnartz ◽

Ignas G. M. M. Niemegeers

Keyword(s):

Experimental Validation ◽

Ieee 802.15.4 ◽

Local Area Networks ◽

Real Life ◽

Local Area ◽

Wireless Local Area Networks ◽

Wireless Sensor ◽

Ieee 802.11B ◽

Ism Band ◽

Coexistence Issues

As IEEE 802.15.4 Wireless Sensor Networks (WSNs) and IEEE 802.11b/g Wireless Local Area Networks (WLANs) are often collocated, coexistence issues arise as these networks share the same 2.4 GHz Industrial, Scientific, and Medical (ISM) band. Consequently, their performance may degrade. We have proposed a coexistence model of IEEE 802.15.4 and IEEE 802.11b/g networks, which addresses their coexistence behavior and explains their coexistence performance. As an extension of the previous work, a compact testbed was developed and experiments on the coexistence issues between these networks were conducted. The experiments not only validated the theoretical model but also provided more information and insights about the coexistence issues in the real-life environment.

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IEEE 802.15.4 Performance with Wi-Fi Interference

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.526.330 ◽

2014 ◽

Vol 526 ◽

pp. 330-335

Author(s):

Fu Qiang Wang ◽

Xiao Ming Wu ◽

Yong Pang ◽

Yan Liang ◽

Yi Fan Hu

Keyword(s):

Ieee 802.11 ◽

Frequency Band ◽

Ieee 802.15.4 ◽

Real Life ◽

Energy Detection ◽

Performance Measure ◽

The Other ◽

Ism Band ◽

Close Frequency ◽

Coexistence Issues

This The IEEE 802.15.4 devices are proposed to operate in the 2.4 GHz industrial, scientific and medical (ISM) band. The other devices that use IEEE 802.11 b, g and n share the same frequency band. The interference caused by these technologies can degrade the performance of an IEEE 802.15.4 based wireless network. In this paper we study such degrading effects on a network equipped with IEEE 802.15.4 devices that is exposed to interference in turn with IEEE 802.11 b, g and n. The performance measure in this paper is the link Packet Receive Rate (PRR). Measurements are performed with real-life equipment, in order to quantify coexistence issues. We test all 16 channels of IEEE 802.15.4 in 2.4G band and the results show the decrease of PRR when suffering in close frequency with IEEE 802.11. The connection between energy detection and PRR is also exhibited in this paper.

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