Abstract: A transmission control method includes sending or receiving, by a first device, first data to or from a second device through a first communication connection, detecting, by the first device when sending or receiving the first data to or from the second device through the first communication connection, that an error has occurred on the first communication connection, and sending, by the first device, error information of the first communication connection to the second device through a second communication connection, where the second communication connection is different from the first communication connection, and the error information indicates that the error has occurred on the first communication connection.

Abstract: A transmission control method is provided: sending/receiving, by a first device, first data to/from a second device through a first communication connection; in a process in which the first device sends/receives the first data to/from the second device through the first communication connection, detecting, by the first device, that an error occurs on the first communication connection; and sending, by the first device, error information of the first communication connection to the second device through a second communication connection, where the second communication connection is different from the first communication connection, and the error information is used to indicate that the error occurs on the first communication connection.

Abstract: A first device obtains an advertising parameter used by a second device to send an advertising data packet, where the advertising parameter includes an advertising window and an advertising interval. The first device determines, based on the advertising window and the advertising interval by using a preset scanning model, a target scan parameter used by the first device, where the target scan parameter is a scan parameter used by the first device when power consumption of the first device is a preset threshold and a scan-to-discover time period satisfies a preset condition. The target scan parameter includes a target scan window and a target scan interval. The first device performs scanning based on the target scan window and the target scan interval.

Abstract: Embodiments of the present invention provide a Bluetooth connection method, including: sending, by a first terminal, a Bluetooth low energy BLE advertising message, where the BLE advertising message includes device information; receiving, by a second terminal, the BLE advertising message; obtaining, by the second terminal, the device information; matching, by the second terminal, the device information with prestored device information; if the device information successfully matches the prestored device information, initiating, by the second terminal, a classic Bluetooth connection request to the first terminal; and establishing, by the first terminal, a classic Bluetooth connection to the second terminal. Power consumption of BLE is low.

Abstract: A first device obtains an advertising parameter used by a second device to send an advertising data packet, where the advertising parameter includes an advertising window and an advertising interval. The first device determines, based on the advertising window and the advertising interval by using a preset scanning model, a target scan parameter used by the first device, where the target scan parameter is a scan parameter used by the first device when power consumption of the first device is a preset threshold and a scan-to-discover time period satisfies a preset condition. The target scan parameter includes a target scan window and a target scan interval. The first device performs scanning based on the target scan window and the target scan interval.

Abstract: Embodiments of the present invention provide a Bluetooth connection method, including: sending, by a first terminal, a Bluetooth low energy BLE advertising message, where the BLE advertising message includes device information; receiving, by a second terminal, the BLE advertising message; obtaining, by the second terminal, the device information; matching, by the second terminal, the device information with prestored device information; if the device information successfully matches the prestored device information, initiating, by the second terminal, a classic Bluetooth connection request to the first terminal; and establishing, by the first terminal, a classic Bluetooth connection to the second terminal. Power consumption of BLE is low.