A system comprising a terminal and a first network device having a first cell and a second cell, the terminal comprising: a processor, a memory, and a transceiver, wherein the memory is configured to store a program instruction and is coupled to the processor, the transceiver is coupled to the processor and is configured to support communication between the terminal and the first network device, wherein the first network device is configured to broadcast first system information and second system information in the second cell of the first network device, wherein the first system information is system information of the first cell, there is no broadcast channel in the first cell and no system information is broadcast, and the second system information is system information of the second cell; wherein the first system information comprises a downlink timing offset between the first cell and the second cell; wherein the downlink timing offset is an offset between a first system frame number, SFN, of the first cell and a SFN of the second cell; wherein the first cell is configured to use a frequency and the second cell is configured to use another frequency that is lower than the frequency used by the first cell, and the second cell is configured to perform broadcasting by using an omnidirectional antenna; wherein the first cell is configured to communicate with the terminal by using a beamforming technology; wherein the terminal is configured to obtain the first system information and the second system information broadcast by the first network device, and camp on or access the first cell based on the first system information; wherein the terminal is configured to determine the first SFN of the first cell based on the second SFN of the second cell and the downlink timing offset before the terminal accesses the first cell based on the first system information; and wherein the terminal is configured to determine a sum of the downlink timing offset and the second SFN as the first SFN. wherein the first network device is configured to broadcast first system information and second system information in the second cell of the first network device, wherein the first system information is system information of the first cell, there is no broadcast channel in the first cell and no system information is broadcast, and the second system information is system information of the second cell; wherein the first system information comprises a downlink timing offset between the first cell and the second cell; wherein the downlink timing offset is an offset between a first system frame number, SFN, of the first cell and a SFN of the second cell; wherein the first cell is configured to use a frequency and the second cell is configured to use another frequency that is lower than the frequency used by the first cell, and the second cell is configured to perform broadcasting by using an omnidirectional antenna; wherein the first cell is configured to communicate with the terminal by using a beamforming technology; wherein the terminal is configured to obtain the first system information and the second system information broadcast by the first network device, and camp on or access the first cell based on the first system information; wherein the terminal is configured to determine the first SFN of the first cell based on the second SFN of the second cell and the downlink timing offset before the terminal accesses the first cell based on the first system information; and wherein the terminal is configured to determine a sum of the downlink timing offset and the second SFN as the first SFN.