The invention discloses a synchronizing method and device for use in a wireless broadband system in an interference environment. The disclosed method comprises the following steps: acquiring the interference information of a network; and selecting at least one channel at least partially based on the interference information in order to transmit resource information through the at least one channel, wherein the resource information indicates resource allocation determined at least partially based on the interference information, and wherein the position of the at least one channel is indicated through a synchronization sequence.