Abstract: The present disclosure relates to channel conflict processing methods and apparatus. In one example method, when a terminal device establishes a connection relationship with a source cell, and sends a connection request to or establishes a connection relationship with a target cell, the terminal device detects whether an uplink channel conflict occurs on an uplink channel of the source cell and an uplink channel of the target cell, where the source cell and the target cell are infra-frequency or intra-band contiguous inter-frequency. If the terminal device determines that an uplink channel conflict occurs, the terminal device sends a signal on an uplink channel with a higher priority between the uplink channel of the source cell and the uplink channel of the target cell.

Abstract: A cell selection method, related to the communications field, includes a terminal device sending a first request to a network device, where the first request is used to request to select a serving cell for the terminal device in an energy efficiency first manner. The terminal device sends first information to the network device, where the first information is used by the network device to select a cell in a first communications system or a cell in a second communications system for the terminal device. The terminal device receives configuration information of a serving cell from the network device, where the serving cell is selected by the network device from the cell in the first communications system or the cell in the second communications system in a manner that energy efficiency of the terminal device is first.

Abstract: A polar code segment encoding method and a related apparatus are disclosed, and the method includes: determining, based on an information bit quantity of a first information bit sequence and a first code rate, a target code length for polar code encoding; determining an initial code length based on the target code length, where the initial code length is an integer multiple of a smallest segment code length; dividing the first information bit sequence into S segments of information bit sequences based on the first code rate and the initial code length and when the initial code length is different from the target code length, performing rate matching on the S segments in a process of performing polar code encoding on the S segments of information bit sequences, where a sum of segment code lengths of the S segments is the target code length after the rate matching.

Abstract: This application provides a communication method in a dual-connectivity mode. In the communication method, maximum transmit power used by a terminal device to send a message corresponding to a main network protocol in a semi-persistent power sharing mode is maximum transmit power 2, maximum transmit power used by the terminal device to send a message corresponding to a secondary network protocol is maximum transmit power 3, the maximum transmit power 2 is less than theoretical maximum transmit power corresponding to the main network protocol, and the maximum transmit power 3 is greater than the theoretical maximum transmit power corresponding to the main network protocol.

Abstract: A communication method includes determining, by a terminal device, first in-device coexistence (IDC) interference adjustment information, where the first IDC interference adjustment information includes frequency bandwidth information, and sending, by the terminal device, the first IDC interference adjustment information to a network device to adjust IDC interference based on the first IDC interference adjustment information.

Abstract: A polar code segment encoding method and a related apparatus are disclosed, and the method includes: determining, based on an information bit quantity of a first information bit sequence and a first code rate, a target code length for polar code encoding; determining an initial code length based on the target code length, where the initial code length is an integer multiple of a smallest segment code length; dividing the first information bit sequence into S segments of information bit sequences based on the first code rate and the initial code length and when the initial code length is different from the target code length, performing rate matching on the S segments in a process of performing polar code encoding on the S segments of information bit sequences, where a sum of segment code lengths of the S segments is the target code length after the rate matching.

Abstract: A communication method includes determining, by a terminal device, first in-device coexistence (IDC) interference adjustment information, where the first IDC interference adjustment information includes frequency bandwidth information, and sending, by the terminal device, the first IDC interference adjustment information to a network device to adjust IDC interference based on the first IDC interference adjustment information.

Abstract: This application provides a data transmission method and a terminal device, to reduce a data transmission latency and improve data transmission reliability. The method includes: obtaining, by a terminal device, a grant-free GF resource configured by a base station; obtaining, by the terminal device, current channel quality; and if the current channel quality is first channel quality, transmitting, by the terminal device, to-be-transmitted data by using the GF resource, or transmitting, by the terminal device, the to-be-transmitted data by using a GB resource, where the first channel quality falls within a first range; or if the current channel quality is second channel quality, skipping, by the terminal device, transmitting to-be-transmitted data by using the GF resource, where the second channel quality falls within a second range; where the first channel quality is better than the second channel quality, and the first range is different from the second range.

Abstract: Embodiments of this application provide an uplink resource pre-application method and a related device. An electronic device may predict encoding duration of a to-be-sent data packet in an application (APP), determine an encoding completion moment of the to-be-sent data packet, and send an uplink scheduling request to a network device before the encoding completion moment of the to-be-sent data packet, to apply for an uplink resource for the to-be-sent data packet in advance. In this way, a latency of sending uplink data by the electronic device may be reduced, and power consumption of the electronic device may be reduced.

Abstract: Embodiments of this application provide a power headroom reporting method for user equipment, a medium, and user equipment. The reporting method includes: The user equipment has at least a first uplink transmit antenna and a second uplink transmit antenna, the first uplink transmit antenna has a first P_MPR value, and the second uplink transmit antenna has a second P_MPR value; and when the user equipment performs uplink data transmission in a single-stream manner, the user equipment sends a first PHR value to a network side, where the first PHR value is obtained based on at least a third power management maximum power reduction P_MPR value, and the third power management maximum power reduction P_MPR value is between the first P_MPR value and the second P_MPR value.

Abstract: This application provides example methods for controlling an output power of an antenna for user equipment. One example method includes, during a sounding reference signal (SRS) transmission period, transmitting, by a first antenna of at least one antenna of the user equipment, a first SRS signal to a base station at a first SRS output power, where the first SRS output power is equal to a maximum output power (Pcmax) of the first antenna. During the SRS period, a non-SRS signal is transmitted to the base station at a non-SRS output power, where the non-SRS output power is less than a difference between the maximum output power of the first antenna and a maximum output power reduction of the first antenna, and the maximum output power reduction of the first antenna is set to meet an electromagnetic power density exposure requirement of the first antenna.

Abstract: A cell selection method, related to the communications field, includes a terminal device sending a first request to a network device, where the first request is used to request to select a serving cell for the terminal device in an energy efficiency first manner. The terminal device sends first information to the network device, where the first information is used by the network device to select a cell in a first communications system or a cell in a second communications system for the terminal device. The terminal device receives configuration information of a serving cell from the network device, where the serving cell is selected by the network device from the cell in the first communications system or the cell in the second communications system in a manner that energy efficiency of the terminal device is first.

Abstract: This application provides a communication method in a dual-connectivity mode. In the communication method, maximum transmit power used by a terminal device to send a message corresponding to a main network protocol in a semi-persistent power sharing mode is maximum transmit power 2, maximum transmit power used by the terminal device to send a message corresponding to a secondary network protocol is maximum transmit power 3, the maximum transmit power 2 is less than theoretical maximum transmit power corresponding to the main network protocol, and the maximum transmit power 3 is greater than the theoretical maximum transmit power corresponding to the main network protocol.

Abstract: This application relates to the wireless communications field, and discloses a random access method and apparatus, to resolve a problem of how a terminal device selects an uplink to perform random access. The method includes: selecting, by a terminal device, a first uplink from at least two preconfigured uplinks to perform random access; and selecting, by the terminal device when random access performed by using the first uplink fails, a second uplink from the at least two uplinks to perform random access, where the at least two uplinks are communications links between the terminal device and a first network device, the first network device and the terminal device are located in a same cell, the first uplink is a normal uplink NUL, and the second uplink is a supplementary uplink SUL. In this way, the terminal device selects an uplink to perform random access.

Abstract: Embodiments of the present invention disclose a power adjustment method, a terminal, and a storage medium. The method includes: sending, by a terminal, an uplink resource request by using a power of a; if the terminal receives no resource allocation signaling within a predetermined time after the uplink resource request is sent, sending, by the terminal, the uplink resource request again by using a power of b1, wherein b1 is greater than a. Embodiments of the present invention may improve communication efficiency.

Abstract: The present disclosure relates to channel conflict processing methods and apparatus. In one example method, when a terminal device establishes a connection relationship with a source cell, and sends a connection request to or establishes a connection relationship with a target cell, the terminal device detects whether an uplink channel conflict occurs on an uplink channel of the source cell and an uplink channel of the target cell, where the source cell and the target cell are infra-frequency or intra-band contiguous inter-frequency. If the terminal device determines that an uplink channel conflict occurs, the terminal device sends a signal on an uplink channel with a higher priority between the uplink channel of the source cell and the uplink channel of the target cell.

Abstract: The disclosure provides communication methods and apparatuses. One example method includes that after receiving a cell handover command, a terminal device determines discontinuous reception (DRX) configuration information of a target cell. The DRX configuration information of the target cell is consistent with DRX configuration information of a source cell. The terminal device exchanges data at least with the source cell based on the DRX configuration information of the source cell, or with the target cell based on the DRX configuration information of the target cell.

Abstract: A communication method includes determining, by a terminal device, first in-device coexistence (IDC) interference adjustment information, where the first IDC interference adjustment information includes frequency bandwidth information, and sending, by the terminal device sends, the first IDC interference adjustment information to a network device to adjust IDC interference based on the first IDC interference adjustment information.

Abstract: This application provides a data transmission method and a terminal device, to reduce a data transmission latency and improve data transmission reliability. The method includes: obtaining, by a terminal device, a grant-free GF resource configured by a base station; obtaining, by the terminal device, current channel quality; and if the current channel quality is first channel quality, transmitting, by the terminal device, to-be-transmitted data by using the GF resource, or transmitting, by the terminal device, the to-be-transmitted data by using a GB resource, where the first channel quality falls within a first range; or if the current channel quality is second channel quality, skipping, by the terminal device, transmitting to-be-transmitted data by using the GF resource, where the second channel quality falls within a second range; where the first channel quality is better than the second channel quality, and the first range is different from the second range.

Abstract: This application relates to the wireless communications field, and discloses a random access method and apparatus, to resolve a problem of how a terminal device selects an uplink to perform random access. The method includes: selecting, by a terminal device, a first uplink from at least two preconfigured uplinks to perform random access; and selecting, by the terminal device when random access performed by using the first uplink fails, a second uplink from the at least two uplinks to perform random access, where the at least two uplinks are communications links between the terminal device and a first network device, the first network device and the terminal device are located in a same cell, the first uplink is a normal uplink NUL, and the second uplink is a supplementary uplink SUL. In this way, the terminal device selects an uplink to perform random access.