The effect of people presence on WLAN RSS is governed by influence distance

Recently, there is high demand for implementing Location Based Services (LBS) indoor. Many technologies and methods have been investigated for this issue since GPS could not prove accurate positioning indoor. Although WLAN-fingerprinting is considered as one of the most accurate IPS method, its accuracy vulnerable to WLAN RSS fluctuation. This fluctuation occurs due to the physical obstacles presence. Many research papers highlighted people's presence near to mobile device (MD) between it and Access point (AP) as RSS attenuate factor, but it is hard to find a research paper investigated this attenuation factor as in the case of walls and ceilings. People presence effect was estimated in previous work as -5dBm on closed distance from MD but it still need a lot of investigation. This paper raises the existence of people presence influence distance as a new concept related to people presence effect. In addition to this, it provides experimental work in order to prove the truth of this claim. The obtained results proved the truth of this claim and the existence of the influence distance became a fact.