A communication method, wherein the method comprises: generating, by an access network device, a synchronization signal block, SSB; and broadcasting, by the access network device, the SSB; characterized in that : the SSB comprises a first physical broadcast channel, PBCH, and a second PBCH, the first PBCH carries time-frequency resource position information of first synchronization information, the second PBCH carries time-frequency resource position information of second synchronization information, and a time-frequency resource position of the first synchronization information is different from a time-frequency resource position of the second synchronization information; and wherein the first PBCH carries third synchronization information, the time-frequency resource position information of the first synchronization information and the third synchronization information are used for downlink synchronization of a first-type terminal device, and the time-frequency resource position information of the second synchronization information and the third synchronization information are used for downlink synchronization of a second-type terminal device. generating, by an access network device, a synchronization signal block, SSB; and broadcasting, by the access network device, the SSB; characterized in that : the SSB comprises a first physical broadcast channel, PBCH, and a second PBCH, the first PBCH carries time-frequency resource position information of first synchronization information, the second PBCH carries time-frequency resource position information of second synchronization information, and a time-frequency resource position of the first synchronization information is different from a time-frequency resource position of the second synchronization information; and wherein the first PBCH carries third synchronization information, the time-frequency resource position information of the first synchronization information and the third synchronization information are used for downlink synchronization of a first-type terminal device, and the time-frequency resource position information of the second synchronization information and the third synchronization information are used for downlink synchronization of a second-type terminal device. the SSB comprises a first physical broadcast channel, PBCH, and a second PBCH, the first PBCH carries time-frequency resource position information of first synchronization information, the second PBCH carries time-frequency resource position information of second synchronization information, and a time-frequency resource position of the first synchronization information is different from a time-frequency resource position of the second synchronization information; and wherein the first PBCH carries third synchronization information, the time-frequency resource position information of the first synchronization information and the third synchronization information are used for downlink synchronization of a first-type terminal device, and the time-frequency resource position information of the second synchronization information and the third synchronization information are used for downlink synchronization of a second-type terminal device. <EOS>