An information transmission method, comprising: receiving, by user equipment, system information from a base station, wherein the system information comprises first configuration information, wherein the first configuration information is used to indicate a fixed-downlink time-frequency resource and a fixed-uplink time-frequency resource, and does not indicate an uplink/downlink type of a unit time-frequency resource, the unit time-frequency resource comprises the fixed-downlink time-frequency resource and/or the fixed-uplink time-frequency resource; and the fixed-downlink time-frequency resource is at least one OFDM symbol that starts from a start location of the unit time-frequency resource in time domain, and the fixed-uplink time-frequency resource is at least one OFDM symbol that ends at an end location of the unit time-frequency resource in time domain; obtaining, by the user equipment according to the first configuration information, information on a fixed-downlink time-frequency resource or configuring, by the user equipment according to the first configuration information, information to be carried on a fixed-uplink time-frequency resource; receiving, by the user equipment, downlink control information from the base station on the fixed-downlink time-frequency resource, wherein the downlink control information is used to indicate a type of at least one unit time-frequency resource; and determining, by the user equipment, the type of each of the at least one unit time-frequency resource based on the downlink control information, wherein the type of the at least one unit time-frequency resource comprises: the unit time-frequency resource used to send uplink information, the unit time-frequency resource used to receive downlink information, or the unit time-frequency resource used to send uplink information and receive downlink information. receiving, by user equipment, system information from a base station, wherein the system information comprises first configuration information, wherein the first configuration information is used to indicate a fixed-downlink time-frequency resource and a fixed-uplink time-frequency resource, and does not indicate an uplink/downlink type of a unit time-frequency resource, the unit time-frequency resource comprises the fixed-downlink time-frequency resource and/or the fixed-uplink time-frequency resource; and the fixed-downlink time-frequency resource is at least one OFDM symbol that starts from a start location of the unit time-frequency resource in time domain, and the fixed-uplink time-frequency resource is at least one OFDM symbol that ends at an end location of the unit time-frequency resource in time domain; obtaining, by the user equipment according to the first configuration information, information on a fixed-downlink time-frequency resource or configuring, by the user equipment according to the first configuration information, information to be carried on a fixed-uplink time-frequency resource; receiving, by the user equipment, downlink control information from the base station on the fixed-downlink time-frequency resource, wherein the downlink control information is used to indicate a type of at least one unit time-frequency resource; and determining, by the user equipment, the type of each of the at least one unit time-frequency resource based on the downlink control information, wherein the type of the at least one unit time-frequency resource comprises: the unit time-frequency resource used to send uplink information, the unit time-frequency resource used to receive downlink information, or the unit time-frequency resource used to send uplink information and receive downlink information.