A method for transmitting data, the method comprising transmitting, by a transmitter, at least one synchronization signal, SI, carrying a first identifier; and transmitting, by the transmitter, system information corresponding to the SI at a time-frequency position of system information corresponding to the SI; wherein the system information corresponding to the SI carries information representing a second identifier; wherein the transmitter determines the time-frequency position of system information corresponding to the SI as follows: the transmitter determines the time-frequency position of system information corresponding to the SI according to a time-frequency position of the SI and a first mapping relationship, wherein the first mapping relationship characterizes a correspondence relationship between the time-frequency position of the SI, and the time-frequency position of system information; or the transmitter determines the time-frequency position of system information corresponding to the SI according to a predefined set of time-frequency positions, wherein the set of time-frequency positions comprises the time-frequency position of system information corresponding to the SI; wherein identification information of the transmitter comprises the first identifier and the second identifier, the first identifier including a part of the identification information of the transmitter, and the second identifier including a part or all of the identification information of the transmitter other than the first identifier, and the first identifier. and the second identifier are used to identify the transmitter. transmitting, by a transmitter, at least one synchronization signal, SI, carrying a first identifier; and transmitting, by the transmitter, system information corresponding to the SI at a time-frequency position of system information corresponding to the SI; wherein the system information corresponding to the SI carries information representing a second identifier; wherein the transmitter determines the time-frequency position of system information corresponding to the SI as follows: the transmitter determines the time-frequency position of system information corresponding to the SI according to a time-frequency position of the SI and a first mapping relationship, wherein the first mapping relationship characterizes a correspondence relationship between the time-frequency position of the SI, and the time-frequency position of system information; or the transmitter determines the time-frequency position of system information corresponding to the SI according to a predefined set of time-frequency positions, wherein the set of time-frequency positions comprises the time-frequency position of system information corresponding to the SI; wherein identification information of the transmitter comprises the first identifier and the second identifier, the first identifier including a part of the identification information of the transmitter, and the second identifier including a part or all of the identification information of the transmitter other than the first identifier, and the first identifier. and the second identifier are used to identify the transmitter. the transmitter determines the time-frequency position of system information corresponding to the SI according to a time-frequency position of the SI and a first mapping relationship, wherein the first mapping relationship characterizes a correspondence relationship between the time-frequency position of the SI, and the time-frequency position of system information; or the transmitter determines the time-frequency position of system information corresponding to the SI according to a predefined set of time-frequency positions, wherein the set of time-frequency positions comprises the time-frequency position of system information corresponding to the SI; wherein identification information of the transmitter comprises the first identifier and the second identifier, the first identifier including a part of the identification information of the transmitter, and the second identifier including a part or all of the identification information of the transmitter other than the first identifier, and the first identifier. and the second identifier are used to identify the transmitter.