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The role of this project is to add Power Save support on the ath9k_htc driver when the WiFi card is used in MultiWiFi scenarios on mobile clients.
MultiWiFi, https://www.usenix.org/node/188945, is a technology that allows an 802.11 client to connect to multiple Access Points simultaneously by creating a virtual interface for each AP it sees then maintaining several active connections with those APs. The virtual interfaces are mapped on the same physical WiFi card:
The main problem of using MultiWiFi on mobile devices is the energy consumption: the existing solutions offers Power Save support only for one virtual interface so once the second virtual interface is added, the driver disables automatically the Power Save Support.