A method implemented by a wireless device (200, 102, 104, 106, 108, 110), the method comprising: receiving, by the wireless device (200, 102, 104, 106, 108, 110), a frame (700, 800, 1300), the frame (700, 800, 1300) including: a first Resource Unit, RU, allocation subfield in a first channel, the first RU allocation subfield including resource information for a first frequency area and indicating a first number of user fields in a first channel that correspond to the first frequency area, and a second RU allocation subfield in a second channel, the second RU allocation subfield including resource information for a second frequency area and indicating a second number of user fields in a second channel that correspond to the second frequency area; and when the first frequency area and the second frequency area are the same RU, determining, using both the first RU allocation subfield and the second RU allocation subfield, a number of users allocated to the same RU, wherein frequencies used by the first channel are disjoint from frequencies used by the second channel, and wherein determining the number of users allocated to the same RU comprises: determining, using the first RU allocation subfield, the first number of user fields in the first channel that correspond to the same RU; determining, using the second RU allocation subfield, the second number of user fields in the second channel that correspond to the same RU; and determining a sum of the first number and the second number as the number of users allocated to the same RU, wherein, when the number of users allocated to the same RU is equal to 1, determining that a single user field corresponding to the same RU is of a single user, SU, type, and when the number of users allocated to the same RU is greater than 1, determining that each of a plurality of user fields corresponding to the same RU is of a multi user, MU, type. receiving, by the wireless device (200, 102, 104, 106, 108, 110), a frame (700, 800, 1300), the frame (700, 800, 1300) including: a first Resource Unit, RU, allocation subfield in a first channel, the first RU allocation subfield including resource information for a first frequency area and indicating a first number of user fields in a first channel that correspond to the first frequency area, and a second RU allocation subfield in a second channel, the second RU allocation subfield including resource information for a second frequency area and indicating a second number of user fields in a second channel that correspond to the second frequency area; and a first Resource Unit, RU, allocation subfield in a first channel, the first RU allocation subfield including resource information for a first frequency area and indicating a first number of user fields in a first channel that correspond to the first frequency area, and a second RU allocation subfield in a second channel, the second RU allocation subfield including resource information for a second frequency area and indicating a second number of user fields in a second channel that correspond to the second frequency area; and when the first frequency area and the second frequency area are the same RU, determining, using both the first RU allocation subfield and the second RU allocation subfield, a number of users allocated to the same RU, wherein frequencies used by the first channel are disjoint from frequencies used by the second channel, and wherein determining the number of users allocated to the same RU comprises: determining, using the first RU allocation subfield, the first number of user fields in the first channel that correspond to the same RU; determining, using the second RU allocation subfield, the second number of user fields in the second channel that correspond to the same RU; and determining a sum of the first number and the second number as the number of users allocated to the same RU, determining, using the first RU allocation subfield, the first number of user fields in the first channel that correspond to the same RU; determining, using the second RU allocation subfield, the second number of user fields in the second channel that correspond to the same RU; and determining a sum of the first number and the second number as the number of users allocated to the same RU, wherein, when the number of users allocated to the same RU is equal to 1, determining that a single user field corresponding to the same RU is of a single user, SU, type, and when the number of users allocated to the same RU is greater than 1, determining that each of a plurality of user fields corresponding to the same RU is of a multi user, MU, type.