A wireless communication terminal that is configured to wirelessly communicate with a base wireless communication terminal, the wireless communication terminal comprising: a transceiver; and a processor, wherein the processor is configured to: set an integer selected from a range of 0 to a value equal to or smaller than an Orthogonal Frequency Division Multiple Access, OFDMA Contention Window, OCW, as a counter for random access, and receive a trigger frame for triggering random access using one or more resource units, RUs, allocated for the random access from the base wireless communication terminal using the transceiver, the processor further configured to: decrement a value of the counter by the number of RUs through which the wireless communication terminal is capable of transmitting a trigger based Physical layer Protocol Data Unit, TB PPDU, according to a capability of the wireless communication terminal among the one or more RUs allocated for the random access, randomly select any one of RUs through which the wireless communication terminal is capable of transmitting a TB PPDU according to the capability of the wireless communication terminal among the one or more RUs allocated for the random access when the value of the counter is 0 or reaches 0, and attempt transmission to the base wireless communication terminal using the selected RU, wherein the RU is a group of a plurality of subcarriers usable for uplink transmission and downlink transmission. a transceiver; and a processor, wherein the processor is configured to: set an integer selected from a range of 0 to a value equal to or smaller than an Orthogonal Frequency Division Multiple Access, OFDMA Contention Window, OCW, as a counter for random access, and receive a trigger frame for triggering random access using one or more resource units, RUs, allocated for the random access from the base wireless communication terminal using the transceiver, set an integer selected from a range of 0 to a value equal to or smaller than an Orthogonal Frequency Division Multiple Access, OFDMA Contention Window, OCW, as a counter for random access, and receive a trigger frame for triggering random access using one or more resource units, RUs, allocated for the random access from the base wireless communication terminal using the transceiver, the processor further configured to: decrement a value of the counter by the number of RUs through which the wireless communication terminal is capable of transmitting a trigger based Physical layer Protocol Data Unit, TB PPDU, according to a capability of the wireless communication terminal among the one or more RUs allocated for the random access, randomly select any one of RUs through which the wireless communication terminal is capable of transmitting a TB PPDU according to the capability of the wireless communication terminal among the one or more RUs allocated for the random access when the value of the counter is 0 or reaches 0, and attempt transmission to the base wireless communication terminal using the selected RU, decrement a value of the counter by the number of RUs through which the wireless communication terminal is capable of transmitting a trigger based Physical layer Protocol Data Unit, TB PPDU, according to a capability of the wireless communication terminal among the one or more RUs allocated for the random access, randomly select any one of RUs through which the wireless communication terminal is capable of transmitting a TB PPDU according to the capability of the wireless communication terminal among the one or more RUs allocated for the random access when the value of the counter is 0 or reaches 0, and attempt transmission to the base wireless communication terminal using the selected RU, wherein the RU is a group of a plurality of subcarriers usable for uplink transmission and downlink transmission.