Abstract
As wireless LAN (WLAN) systems become more widespread, inter-cell interference (ICI) among the access points (APs) is increasing in the overlapping cell. Since the ongoing standardization, IEEE802.11TGac, virtually agreed to increase the channel bandwidth, the overlapping cell problems will become severe due to the limited frequency resource. It is important to combat the overlapping cell problems in the overcrowded house environment like Japanese apartments. This paper evaluates an effective region of two scenarios that increased system throughput in overlapping cell environment. As for Scenario 1, both APs suppress ICI each other using the spatial domain resource sharing. As for Scenario 2, one AP suppresses ICI using spatial domain resource sharing while the other AP transmits signal without using the spatial domain resource sharing. We obtain that effective region of Scenario 1 expends as the number of the transmit antennas increases. In addition, it is found that the system throughput decreases 1.6bit/s/Hz in Scenario 1 and 0.8bit/s/Hz in Scenario 2 by assuming that the variance of channel state information error is same as that of the noise.
