Abstract: A data packet transmission method—that includes: obtaining, by a terminal, N application programs that are running; and if the N application programs include an application program including a low-latency service; determining whether an unlicensed frequency band is in a congestion state; and instructing a network device to schedule a data packet of the terminal to a licensed frequency band for transmission when the unlicensed frequency band is in a congestion state. When determining that the N running application programs include the application program including the low-latency service, the terminal may instruct the network device to schedule the data packet of the terminal to the licensed frequency band for transmission, so as to transmit a data packet of the low-latency service by using the licensed frequency band. Resources in the licensed frequency band are centrally scheduled by the network device, instead of being used through contention.

Abstract: A method includes determining, by a user equipment (UE), to use a first radio access technology, and triggering, by the UE, a first event to disable a second radio access technology while the UE currently uses the second radio access technology. The first event indicates that a base station fails to configure a secondary cell or instructs the base station to delete a configured secondary cell. The secondary cell is a secondary cell of the second radio access technology on the unlicensed spectrum.

Abstract: An antenna selection method and a terminal, where the terminal includes m primary antennas configured for a first application program and n secondary antennas, where m?1, and n?1. The method includes, when the terminal is in a WI-FI connected state and a landscape state, obtaining a key factor and a radio frequency indicator that are of each of m+n antenna combinations, determining a first antenna combination based on the key factor and the radio frequency indicator, where the first antenna combination is a first-priority antenna combination of the m+n antenna combinations, and the first antenna combination includes at least one of the secondary antennas, and using the first antenna combination to perform communication for a second application program.

Abstract: An antenna selection method includes selecting M1 antenna sets from CN-L1L2 antenna combinations, where L1 is a quantity of reserved antennas, a sum of L1 and L2 is equal to L, determining an antenna set with a maximum channel capacity, in M2 antenna sets, as a target antenna set to perform a preset-duration data transmission, where the M2 antenna sets are antenna sets formed by the M1 antenna sets and the L1 reserved antennas. The L1 reserved antennas include a maximum SNR in a target antenna set used in previous preset-duration data transmission. Each of the M2 antenna sets includes the L1 reserved antennas.

Abstract: An antenna selection method includes selecting M1 antenna sets from CN?L1L2 antenna combinations, where L1 is a quantity of reserved antennas, a sum of L1 and L2 is equal to L, determining an antenna set with a maximum channel capacity, in M2 antenna sets, as a target antenna set to perform a preset-duration data transmission, where the M2 antenna sets are antenna sets formed by the M1 antenna sets and the L1 reserved antennas. The L1 reserved antennas include a maximum SNR in a target antenna set used in previous preset-duration data transmission. Each of the M2 antenna sets includes the L1 reserved antennas.

Abstract: An antenna selection method and a terminal, where the terminal includes m primary antennas configured for a first application program and n secondary antennas, where m?1, and n?1. The method includes, when the terminal is in a WI-FI connected state and a landscape state, obtaining a key factor and a radio frequency indicator that are of each of m+n antenna combinations, determining a first antenna combination based on the key factor and the radio frequency indicator, where the first antenna combination is a first-priority antenna combination of the m+n antenna combinations, and the first antenna combination includes at least one of the secondary antennas, and using the first antenna combination to perform communication for a second application program.

Abstract: A data packet transmission method—that includes: obtaining, by a terminal, N application programs that are running; and if the N application programs include an application program including a low-latency service; determining whether an unlicensed frequency band is in a congestion state; and instructing a network device to schedule a data packet of the terminal to a licensed frequency band for transmission when the unlicensed frequency band is in a congestion state. When determining that the N running application programs include the application program including the low-latency service, the terminal may instruct the network device to schedule the data packet of the terminal to the licensed frequency band for transmission, so as to transmit a data packet of the low-latency service by using the licensed frequency band. Resources in the licensed frequency band are centrally scheduled by the network device, instead of being used through contention.

Abstract: A method includes determining, by a user equipment (UE), to use a first radio access technology, and triggering, by the UE, a first event to disable a second radio access technology while the UE currently uses the second radio access technology. The first event indicates that a base station fails to configure a secondary cell or instructs the base station to delete a configured secondary cell. The secondary cell is a secondary cell of the second radio access technology on the unlicensed spectrum.

Abstract: A method for controlling a specific absorption rate (SAR) of a wireless communications device and a wireless communications device, and the wireless communications device includes a first antenna and a second antenna. The method includes transmitting, by the wireless communications device, a radio frequency signal using the first antenna, and stopping using the first antenna and starting transmitting the radio frequency signal using the second antenna when transmit power of the first antenna is greater than first preset power and a first time period elapses to enable the wireless communications device to meet an SAR standard. There is no backoff of antenna transmit power in a process of controlling the SAR of the wireless communications device. Therefore, communication quality of the wireless communications device is ensured while the SAR standard is met.

Abstract: Example methods and apparatus for configuring an antenna are disclosed. One method includes determining a communication status of each of a plurality of communications modules in a terminal device. An antenna use priority of each communications module is determined based on the communication status of the communications module. An antenna for each communications module is configured based on the antenna use priority of the communications module.

Abstract: A method for controlling a specific absorption rate (SAR) of a wireless communications device and a wireless communications device, and the wireless communications device includes a first antenna and a second antenna. The method includes transmitting, by the wireless communications device, a radio frequency signal using the first antenna, and stopping using the first antenna and starting transmitting the radio frequency signal using the second antenna when transmit power of the first antenna is greater than first preset power and a first time period elapses to enable the wireless communications device to meet an SAR standard. There is no backoff of antenna transmit power in a process of controlling the SAR of the wireless communications device. Therefore, communication quality of the wireless communications device is ensured while the SAR standard is met.

Abstract: Example methods and apparatus for configuring an antenna are disclosed. One method includes determining a communication status of each of a plurality of communications modules in a terminal device. An antenna use priority of each communications module is determined based on the communication status of the communications module. An antenna for each communications module is configured based on the antenna use priority of the communications module.

Abstract: An antenna allocation method and a terminal for modems to receive a signal with a good antenna includes allocating a first antenna to a first modem; and if it is determined that the first modem satisfies a preset state, allocating the first antenna to any one of N?1 modems other than the first modem.

Abstract: A multimode terminal includes a first modem chip, a second modem chip, a switch connected to both the modem chips, and at least two antennas connected to the switch. The first modem chip includes an antenna selection apparatus configured to select an optimum antenna for the first modem chip, control the switch to connect the first modem chip to the optimum antenna of the first modem chip, determine an optimum antenna of the second modem chip according to a related parameter value of a signal received or transmitted by the second modem chip, and control the switch to connect the second modem chip to the optimum antenna of the second modem chip. The second modem chip includes a measurement apparatus configured to measure the related parameter value of the signal received or transmitted by the second modem chip.

Abstract: A multimode terminal includes a first modem chip, a second modem chip, a switch connected to both the modem chips, and at least two antennas connected to the switch. The first modem chip includes an antenna selection apparatus configured to select an optimum antenna for the first modem chip, control the switch to connect the first modem chip to the optimum antenna of the first modem chip, determine an optimum antenna of the second modem chip according to a related parameter value of a signal received or transmitted by the second modem chip, and control the switch to connect the second modem chip to the optimum antenna of the second modem chip. The second modem chip includes a measurement apparatus configured to measure the related parameter value of the signal received or transmitted by the second modem chip.

Abstract: An antenna allocation method and a terminal for modems to receive a signal with a good antenna includes allocating a first antenna to a first modem; and if it is determined that the first modem satisfies a preset state, allocating the first antenna to any one of N?1 modems other than the first modem.

Abstract: A method for intelligent antenna configuration selection of a communication apparatus including an antenna module including a plurality of antennas and a plurality of radio modules sharing the antenna module includes individually determining a preferred antenna configuration of the antenna module by each radio module; determining an optimum antenna configuration according to the preferred antenna configurations; and controlling a configuration of the antennas based on the optimum antenna configuration. The optimum antenna configuration is determined for a radio module having a highest priority among the radio modules to have an optimum radio communication performance.