The results have shown that the RSSI of all cases, including the base line, are not significantly different. For the interesting regular environment, whereas the RSSI from both with and without glass barrier shows no significant differences (4.37 %), the difference of the average throughput is 11.80%. The preliminary results can be drawn an observation that only the RSSI cannot precisely related to the throughput which is more user's concern. Normally with the same RSSI value, the device might run on different Modulation and Coding Scheme MCS) index value, caused different throughput.