A communication method, comprising: sending, by a base station, carrier configuration information to a terminal, wherein the carrier configuration information is used to determine carriers that can be configured for the terminal; and performing, by the base station, uplink reception at different transmission time intervals, TTIs, by using different carriers in the carriers that can be configured for the terminal, wherein before the performing, by the base station, uplink reception at different transmission time intervals TTIs by using different carriers in the carriers that can be configured for the terminal, the method further comprises: sending, by the base station, a data sending instruction to the terminal; the performing, by the base station, uplink reception at different transmission time intervals TTIs by using different carriers in the carriers that can be configured for the terminal comprises: receiving, by the base station at different TTIs by using different carriers in the carriers that can be configured for the terminal, uplink data sent by the terminal according to the data sending instruction; and after the performing, by the base station, uplink reception at different transmission time intervals TTIs by using different carriers in the carriers that can be configured for the terminal, the method is characterized by: sending, by the base station, a carrier switching instruction to the terminal when determining that a first carrier on which uplink data transmission is performed at a first TTI does not meet a preset condition and that a second carrier meets the preset condition. sending, by a base station, carrier configuration information to a terminal, wherein the carrier configuration information is used to determine carriers that can be configured for the terminal; and performing, by the base station, uplink reception at different transmission time intervals, TTIs, by using different carriers in the carriers that can be configured for the terminal, wherein before the performing, by the base station, uplink reception at different transmission time intervals TTIs by using different carriers in the carriers that can be configured for the terminal, the method further comprises: sending, by the base station, a data sending instruction to the terminal; the performing, by the base station, uplink reception at different transmission time intervals TTIs by using different carriers in the carriers that can be configured for the terminal comprises: receiving, by the base station at different TTIs by using different carriers in the carriers that can be configured for the terminal, uplink data sent by the terminal according to the data sending instruction; and after the performing, by the base station, uplink reception at different transmission time intervals TTIs by using different carriers in the carriers that can be configured for the terminal, the method is characterized by: sending, by the base station, a carrier switching instruction to the terminal when determining that a first carrier on which uplink data transmission is performed at a first TTI does not meet a preset condition and that a second carrier meets the preset condition. sending, by the base station, a data sending instruction to the terminal; the performing, by the base station, uplink reception at different transmission time intervals TTIs by using different carriers in the carriers that can be configured for the terminal comprises: receiving, by the base station at different TTIs by using different carriers in the carriers that can be configured for the terminal, uplink data sent by the terminal according to the data sending instruction; and after the performing, by the base station, uplink reception at different transmission time intervals TTIs by using different carriers in the carriers that can be configured for the terminal, the method is characterized by: sending, by the base station, a carrier switching instruction to the terminal when determining that a first carrier on which uplink data transmission is performed at a first TTI does not meet a preset condition and that a second carrier meets the preset condition. receiving, by the base station at different TTIs by using different carriers in the carriers that can be configured for the terminal, uplink data sent by the terminal according to the data sending instruction; and after the performing, by the base station, uplink reception at different transmission time intervals TTIs by using different carriers in the carriers that can be configured for the terminal, the method is characterized by: sending, by the base station, a carrier switching instruction to the terminal when determining that a first carrier on which uplink data transmission is performed at a first TTI does not meet a preset condition and that a second carrier meets the preset condition.