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The IEEE 802.11n wireless local-area network (WLAN) has been extensively deployed around the world due to the flexibility, lower cost, and the high-speed data transmission capability at 2.4 GHz ISM band. However, in the WLAN deployment, one key challenge is to optimize the channel assignment of access-points (APs) under the small number of partially overlapping channels (POCs) to reduce radio interference, particularly for the channel bonding. In POCs, the frequency spectrums of adjacent channels are partially overlapped with one another, which will result to low throughput for concurrently communicating links using them. The accurate throughput estimation of a link is critical in the optimal WLAN deployment. Previously, we studied the throughput drop estimation model using the receiving signal strength (RSS) from the interfered link for two concurrently communicating links under POCs. In this paper, based on measurement results, we have extended this model for three concurrently communicating links. The accuracy of this model extension is verified by comparing the estimated results with the measured ones.

the energy consumption. The transmission power minimization is expected to lengthen the lifetime of the AP device [11]. In this extension, first, the previous active AP configuration finds the active APs, AP-host associations, and AP channel assignments, assuming the use of the maximum transmission power. Then, it minimizes the transmission power of each active AP such that it satisfies the minimum throughput constraint. The previous throughput estimation model [12] has been used to evaluate the throughput for each transmission power, where the model parameter values are obtained from extensive measurements.

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