Dynamic Range Implementation in Wi-Fi Access Point Through Range Adaptation Algorithm
A normal Wi-Fi access point (AP) works with a particular modulation and coding scheme (MCS). Each MCS value corresponds to a particular throughput and range. Because of this, a Wi-Fi Access point supports only a particular range at any given time. When the client is moving away from the access point, it loses the connectivity and if the Wi-Fi AP is working with the highest MCS index value, then the range supported by the AP becomes very small. Hence through dynamically changing the MCS value as the client is moving away or towards the AP, the range supported by the Wi-Fi access point can be made to change dynamically. This is achieved through the implementation of a Range adaptation algorithm. The algorithm works by knowing the position of a client can be deduced from the SNR value of its received signal. After knowing the position the highest Vht-Mcs value with a range that can support the client’s position is chosen. In this paper, the relation between SNR and MCS is studied and then an algorithm based on this is developed for changing range dynamically.
KeywordsIEEE 802.11ac Modulation and coding scheme (MCS) Signal-to-noise ratio Very high throughput (VHT) Wi-Fi access point (AP) BPSK QPSK QAM Multicast MIMO
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