A method for secondary channel spatial reuse in a wireless network , the method comprising: detecting a data unit at a first wireless device of a first basic service set , BSS, the data unit sent on a channel from a second wireless device of a second overlapping basic service set , OBSS, the data unit having a channel bandwidth comprising both a primary channel and a secondary channel of the wireless network ; characterized by : ignoring the data unit after detecting the data unit by not setting a network allocation vector, NAV, timer based on frames in the data unit and by resetting a state of a clear channel assessment, CCA, for the channel from busy to idle before all frames of the data unit are received by the first wireless device ; determining whether the first wireless device and the second wireless device are in a same spatial reuse group, SRG; when the first wireless device and the second wireless device are in the same SRG, then adjusting an OBSS power density threshold to generate a SRG OBSS power density threshold that is higher than the OBSS power density threshold ; and during a receive duration time of the data unit, applying the SRG OBSS power density threshold to secondary channels that are within the channel bandwidth of the data unit. detecting a data unit at a first wireless device of a first basic service set , BSS, the data unit sent on a channel from a second wireless device of a second overlapping basic service set , OBSS, the data unit having a channel bandwidth comprising both a primary channel and a secondary channel of the wireless network ; characterized by : ignoring the data unit after detecting the data unit by not setting a network allocation vector, NAV, timer based on frames in the data unit and by resetting a state of a clear channel assessment, CCA, for the channel from busy to idle before all frames of the data unit are received by the first wireless device ; determining whether the first wireless device and the second wireless device are in a same spatial reuse group, SRG; when the first wireless device and the second wireless device are in the same SRG, then adjusting an OBSS power density threshold to generate a SRG OBSS power density threshold that is higher than the OBSS power density threshold ; and during a receive duration time of the data unit, applying the SRG OBSS power density threshold to secondary channels that are within the channel bandwidth of the data unit. ignoring the data unit after detecting the data unit by not setting a network allocation vector, NAV, timer based on frames in the data unit and by resetting a state of a clear channel assessment, CCA, for the channel from busy to idle before all frames of the data unit are received by the first wireless device ; determining whether the first wireless device and the second wireless device are in a same spatial reuse group, SRG; when the first wireless device and the second wireless device are in the same SRG, then adjusting an OBSS power density threshold to generate a SRG OBSS power density threshold that is higher than the OBSS power density threshold ; and during a receive duration time of the data unit, applying the SRG OBSS power density threshold to secondary channels that are within the channel bandwidth of the data unit. <EOS>