Signal transmission method and system, and controller

A controller, wherein a first signal and a second signal work at the same time and share an antenna, wherein the first signal and the second signal have a shared band, a radio frequency front-end comprises the antenna, and the antenna is configured to receive and send a mixed signal of the first signal and the second signal;

• and the controller comprises:
• a processor;
• and
• a memory storing instructions which when executed by the processor causes the processor to implement operations including:
• determining that a priority of the first signal is higher than a priority of the second signal;
• when the first signal and the second signal work at the same time, determining whether a signal status of the first signal with a higher priority satisfies a service requirement;
• when the service requirement is not satisfied, guiding the mixed signal of the first signal and the second signal that is received by the antenna to a processing back-end of the first signal by using a single-pole double-throw switch;
• and
• when the service requirement is satisfied, guiding the mixed signal of the first signal and the second signal that is received by the antenna to a power splitter by using the single-pole double-throw switch, and separately transferring the mixed signal of the first signal and the second signal to the processing back-end of the first signal and a processing back-end of the second signal by using the power splitter.

A signal transmission system, wherein a first signal and a second signal have a shared band, and the system comprises:

• a controller, a single-pole double-throw switch, a power splitter, a radio frequency front-end, a processing back-end of the first signal, and a processing back-end of the second signal, wherein
• the radio frequency front-end comprises an antenna;
• a common end of the single-pole double-throw switch is connected to the antenna, a first end of the single-pole double-throw switch is connected to the processing back-end of the first signal, and a second end of the single-pole double-throw switch is connected to an input end of the power splitter;
• a first output end of the power splitter is connected to the processing back-end of the first signal, and a second output end of the power splitter is connected to the processing back-end of the second signal;
• the antenna is configured to receive and send a mixed signal of the first signal and the second signal;
• the controller is configured to execute operations including:
• determining that a priority of the first signal is higher than a priority of the second signal;
• when the first signal and the second signal work at the same time, determining whether a signal status of the first signal with a higher priority satisfies a service requirement;
• when the service requirement is not satisfied, controlling the first end of the single-pole double-throw switch to be conducted;
• or
• when the service requirement is satisfied, controlling the second end of the single-pole double-throw switch to be conducted;
• the power splitter is configured to receive, by using the input end of the power splitter, the mixed signal of the first signal and the second signal that is sent by the antenna, and separately transfer the received mixed signal of the first signal and the second signal to the processing back-end of the first signal and the processing back-end of the second signal;
• and
• the processing back-end of the first signal or the processing back-end of the second signal is configured to process the mixed signal of the first signal and the second signal that is sent by the antenna.