A method of receiving a Wake-Up Radio, WUR, frame by a Station, STA , in a Wireless LAN, WLAN, the method comprising: receiving the WUR frame including a first portion of a Timing Synchronization Function, TSF, timer and a Message Integrity Check, MIC, value; calculating a verification value based on the first portion of the TSF timer included in the WUR subframe and a TSF timer stored in the STA; and discarding the received WUR frame if the MIC value included in the WUR frame does not match the calculated verification value and performing a wake-up operation based on the WUR frame if the MIC value included in the WUR frame matches the calculated verification value, wherein the first portion of the TSF timer included in the WUR subframe is 8 bits next to least significant N bits in the TSF timer included in the WUR subframe, wherein the STA obtains a consecutive 48-bit partial TSF timer value through the first portion of the TSF timer included in the WUR subframe and a second portion of the TSF timer stored in the STA and calculates the verification value based on the consecutive 48-bit partial TSF timer value, wherein the TSF timer stored in the STA is total 64 bits and wherein most significant M-bit of the TSF timer stored in the STA is excluded from the partial TSF timer value, wherein the STA obtains the consecutive 48-bit partial TSF timer value based on setting the first portion of the TSF timer included in the WUR subframe to 8 least significant bits of the consecutive 48-bit partial TSF timer value and setting the second portion of the TSF timer stored in the STA to the remaining 40 bits of the consecutive 48-bit partial TSF timer value. receiving the WUR frame including a first portion of a Timing Synchronization Function, TSF, timer and a Message Integrity Check, MIC, value; calculating a verification value based on the first portion of the TSF timer included in the WUR subframe and a TSF timer stored in the STA; and discarding the received WUR frame if the MIC value included in the WUR frame does not match the calculated verification value and performing a wake-up operation based on the WUR frame if the MIC value included in the WUR frame matches the calculated verification value, wherein the first portion of the TSF timer included in the WUR subframe is 8 bits next to least significant N bits in the TSF timer included in the WUR subframe, wherein the STA obtains a consecutive 48-bit partial TSF timer value through the first portion of the TSF timer included in the WUR subframe and a second portion of the TSF timer stored in the STA and calculates the verification value based on the consecutive 48-bit partial TSF timer value, wherein the TSF timer stored in the STA is total 64 bits and wherein most significant M-bit of the TSF timer stored in the STA is excluded from the partial TSF timer value, wherein the STA obtains the consecutive 48-bit partial TSF timer value based on setting the first portion of the TSF timer included in the WUR subframe to 8 least significant bits of the consecutive 48-bit partial TSF timer value and setting the second portion of the TSF timer stored in the STA to the remaining 40 bits of the consecutive 48-bit partial TSF timer value. <EOS>