Abstract: A method and an apparatus for wireless fidelity (Wi-Fi) fast connection are provided. The method includes the following. After a terminal device detects Wi-Fi is turned on by a user, a Wi-Fi driver is loaded and wpa_supplicant is started as a support library of Wi-Fi protected access (WPA). After determining that the wpa_supplicant is started, the terminal device sends a scanning command and performs a scanning operation, and performs, in parallel with sending the scanning command and performing the scanning operation, operations of loading pre-stored access points, setting all the pre-stored access points to be connectable, updating a current connection state, turning on Wi-Fi peer-to-peer, and setting parameters of the Wi-Fi peer-to-peer. After setting the parameters of the Wi-Fi peer-to-peer, the terminal device connects to a first access point according to the scanning result of the scanning operation.

Abstract: A method for data transmission and a terminal are provided. The method includes the following. An acknowledgment message for indicating successful data reception is generated in response to first downlink data received by a terminal. The acknowledgment message is transmitted via a preset channel resource when a channel resource occupancy priority of the acknowledgment message is higher than a channel resource occupancy priority of second downlink data to be received by the terminal.

Abstract: A method for setting Wi-Fi roaming is provided. The method includes the following. Monitor an operation of connecting a terminal device to a first access point (AP). Obtain a first received signal strength indication (RSSI) of a signal of a wireless network received by the terminal device after the terminal device is connected to the first AP. Determine whether an RSSI adjustment value is greater than a preset RSSI lower limit, where the RSSI adjustment value is a difference between the first RSSI and a preset RSSI weight. The preset RSSI lower limit is set to be a roaming threshold in response to determining that the RSSI adjustment value is greater than the preset RSSI lower limit. The RSSI adjustment value is set to be the roaming threshold in response to determining that the RSSI adjustment value is less than or equal to the preset RSSI lower limit.

Abstract: A method for setting Wi-Fi roaming, and a terminal are provided. The method includes the following. A first received signal strength indication (RSSI) value is obtained when a terminal is connected to a first AP. An RSSI adjustment value is obtained by subtracting a preset RSSI weight from the first RSSI value. A preset RSSI lower limit is set to be a roaming threshold when the RSSI adjustment value is greater than the preset RSSI lower limit, and the RSSI adjustment value is set to be the roaming threshold when the RSSI adjustment value is not greater than the preset RSSI lower limit, where the roaming threshold is used to trigger the terminal to roam between different Wi-Fi networks.

Abstract: A method and an apparatus for wireless fidelity (Wi-Fi) fast connection are provided. The method includes the following. After a terminal device detects Wi-Fi is turned on by a user, a Wi-Fi driver is loaded and wpa_supplicant is started as a support library of Wi-Fi protected access (WPA). After determining that the wpa_supplicant is started, the terminal device sends a scanning command and performs a scanning operation, and performs, in parallel with sending the scanning command and performing the scanning operation, operations of loading pre-stored access points, setting all the pre-stored access points to be connectable, updating a current connection state, turning on Wi-Fi peer-to-peer, and setting parameters of the Wi-Fi peer-to-peer. After setting the parameters of the Wi-Fi peer-to-peer, the terminal device connects to a first access point according to the scanning result of the scanning operation.

Abstract: A method for setting Wi-Fi roaming is provided. The method includes the following. Monitor an operation of connecting a terminal device to a first access point (AP). Obtain a first received signal strength indication (RSSI) of a signal of a wireless network received by the terminal device after the terminal device is connected to the first AP. Determine whether an RSSI adjustment value is greater than a preset RSSI lower limit, where the RSSI adjustment value is a difference between the first RSSI and a preset RSSI weight. The preset RSSI lower limit is set to be a roaming threshold in response to determining that the RSSI adjustment value is greater than the preset RSSI lower limit. The RSSI adjustment value is set to be the roaming threshold in response to determining that the RSSI adjustment value is less than or equal to the preset RSSI lower limit.

Abstract: A method for setting Wi-Fi roaming, and a terminal are provided. The method includes the following. A first received signal strength indication (RSSI) value is obtained when a terminal is connected to a first AP. An RSSI adjustment value is obtained by subtracting a preset RSSI weight from the first RSSI value. A preset RSSI lower limit is set to be a roaming threshold when the RSSI adjustment value is greater than the preset RSSI lower limit, and the RSSI adjustment value is set to be the roaming threshold when the RSSI adjustment value is not greater than the preset RSSI lower limit, where the roaming threshold is used to trigger the terminal to roam between different Wi-Fi networks.

Abstract: A method for data transmission and a terminal are provided. The method includes the following. An acknowledgment message for indicating successful data reception is generated in response to first downlink data received by a terminal. The acknowledgment message is transmitted via a preset channel resource when a channel resource occupancy priority of the acknowledgment message is higher than a channel resource occupancy priority of second downlink data to be received by the terminal.