2.4GHz通訊頻帶下不同通訊協定之干擾分析-以ZigBee、Bluetooth、WLAN為例

Radio Interference of Different Protocols in 2.4 GHz Communication Band

吳建樺(Jian-Hua Wu)

指導教授 ： 李仁貴

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00395

摘要

目前熱門的無線網路規範中，主要之協定為電子電機工程協會(Institute of Electrical and Electronics Engineers, IEEE )所制定的IEEE 802.15.4、IEEE 802.11、藍芽，本研究針對其所制定的IEEE 802.15.4標準、IEEE 802.11b無線區域網路及藍芽共存於同一網路中，將通道干擾之效能做分析比較。
研究使用兩台筆記型電腦做WLAN與藍芽之平台，而ZigBee則使用臺灣大學之Super Node做為之測試平台做實驗測試，在三種不同環境中，各裝置皆相距兩公尺，為避免地面干擾裝置皆離地至少30公分，WLAN固定使用通道11(2462 Mhz)，藍芽使用2.1版本，而ZigBee使用通道11(2410MHz)及通道22(2460MHz)，針對相近通道與錯開通道以及不同之外在干擾因素觀察其封包遺失率(Packet Error Rate(PER))與接受訊號強度指標(Received Signal Strength Indication(RSSI))狀況。由實驗結果知道ZigBee與WLAN在通道相近時，ZigBee之RSSI約落在-87.6dBm至-86dBm間，PER在95%至97%間；而錯開通道時，ZigBee之RSSI強度約-80dBm，PER為5%。因此使用在2.4GHz頻帶之設備需考量到通道之問題。

關鍵字

2.4GHz通訊頻帶 ； 接受訊號強度指標 ； 封包遺失率

並列摘要

The IEEE 802.15.4 standard, IEEE 802.11b and Bluetooth coexist on the same network and which the standard developed and set up by IEEE. To comparison of the performance and the channel interference analysis with 2.4 GHz under the protocols.
This study used two laptops to do a platform with WLAN and Bluetooth,and ZigBee used the Super Node mdae by National Taiwan University to do a platform.
In three different environments,thedevices are separated by two meters, to avoid ground interference devicesareat least 0.3 meter fromthe ground,WLAN fixed using channel 11 (2462 Mhz), Bluetooth uses version2.1, and ZigBee uses channel 11 (2410MHz)and channel 22 (2460MHz), similar tocoveredchannel and not covered channels and external disturbances to observe the PER and RSSI conditions. As the results when ZigBee and WLAN in thecoveredchannel, ZigBee's RSSI falls approximately between -87.6dBm to-86dBm, PER at between 95%-97%; and not coveredchannel, ZigBee's RSSI about-80dBm, PER is 5%. Therefore, use of equipment in the 2.4GHz communication band should be considerd the channel conflict.

並列關鍵字

2.4 GHz communication band ； RSSI ； Packet Error Rate

參考文獻

[1] International Telecommunication Union, http://www.itu.int/osg/spu/ni/3G

[3] IEEE 802.11TM WIRELESS LOCAL AREA NETWORKS,

Telecommunications and information exchange between systems─Local and

metropolitan area networks─Specific requirements─Part 15.4:Wireless

Medium Acess Control (MAC) and Physical Layer (PHY) Specifications for