1. A Wireless Local Area Network (WLAN) transmitting method,the method comprising:
sending, by an access point (AP), a trigger frame which includes a common information part and one or more user information parts located after the common information part,
wherein the common information part comprises sub-channel allocation information for indicating one or more sub-channels,
wherein at least one of the one or more user information parts comprises a user identifier (AID), a start location indication field and a number indication field,
wherein the AID is a value indicating that one or more contiguous resource units (RUs) allocated based on the at least one of the one or more user information parts are used for random access, the start location indication field is used to indicate a start location of the one or more contiguous RUs used for random access, and the number indication field is used to indicate a number of the one or more contiguous RUs used for random access, and
wherein the sub-channel allocation information further indicates a quantity of RUs, of the one or more contiguous RUs, associated with each sub-channel indicated by the sub-channel allocation information.