A signal transmission method, comprising: receiving, by a terminal device, first configuration information from a first base station, the first configuration information being configured for determining a first time domain position, wherein the first base station is a base station corresponding to a first communication card in the terminal device, and the first communication card is in a connected state; and receiving, by the terminal device, a signal from a second base station at the first time domain position, wherein the second base station is a base station corresponding to a second communication card in the terminal device, characterized in that, the first configuration information comprises a gap pattern configuration, the gap pattern configuration being configured for determining a time domain position of a gap, wherein the first time domain position is the time domain position of the gap; the method further comprises: performing, by the terminal device, cell selection measurement and/or cell re-selection measurement corresponding to the second communication card at the time domain position of the gap, wherein, when the terminal device determines that the gap pattern configuration is not required, sending, by the terminal device, a fifth request message to the first base station, the fifth request message being configured for requesting release of the gap pattern configuration; and after receiving a release acknowledgment message, releasing, by the terminal device, the gap pattern configuration. receiving, by a terminal device, first configuration information from a first base station, the first configuration information being configured for determining a first time domain position, wherein the first base station is a base station corresponding to a first communication card in the terminal device, and the first communication card is in a connected state; and receiving, by the terminal device, a signal from a second base station at the first time domain position, wherein the second base station is a base station corresponding to a second communication card in the terminal device, characterized in that, the first configuration information comprises a gap pattern configuration, the gap pattern configuration being configured for determining a time domain position of a gap, wherein the first time domain position is the time domain position of the gap; the method further comprises: performing, by the terminal device, cell selection measurement and/or cell re-selection measurement corresponding to the second communication card at the time domain position of the gap, wherein, when the terminal device determines that the gap pattern configuration is not required, sending, by the terminal device, a fifth request message to the first base station, the fifth request message being configured for requesting release of the gap pattern configuration; and after receiving a release acknowledgment message, releasing, by the terminal device, the gap pattern configuration. performing, by the terminal device, cell selection measurement and/or cell re-selection measurement corresponding to the second communication card at the time domain position of the gap, wherein, when the terminal device determines that the gap pattern configuration is not required, sending, by the terminal device, a fifth request message to the first base station, the fifth request message being configured for requesting release of the gap pattern configuration; and after receiving a release acknowledgment message, releasing, by the terminal device, the gap pattern configuration.