Empirical study on suitable scan duration for energy detection in clear channel assessment sensing method for IEEE802.15.4 transceiver

The ubiquitous increase in wireless technologies utilizing the 2.4 GHz frequency band leads to spectrum congestion that reduce Quality of Service (QoS) of wireless technologies especially IEEE802.15.4 Wireless Sensor Network (WSN) due to its low data rate and low transmission power characteristics. A number of research proposed channel separation by utilizing Energy Detection (ED) as a solution to overcome the interference issue. However, to the author's knowledge there is little information on scan duration set for ED that need to be pre-configured before any communication or transmission can be established. This paper present an empirical study conducted to identify suitable scan duration for ED. Experimental test in this study is conducted in two different conditions: 1) without interference and 2) with interference from IEEE802.11b WiFi Access Point (AP). After considering the tradeoff between accuracy and false detection, the outcome from this study suggests that n=3 is suitable scan duration (SD) to be configured for ED.