Abstract: A data transmission method, applied to a first terminal device, includes receiving a first message from a second terminal device, determining a first session parameter based on the first message, determining a first session based on the first session parameter, receiving first data from the second terminal device, and sending the first data to a network device using the first session. The first terminal device may determine, based on the first message from the second terminal device, the first session parameter that meets a service requirement of the second terminal device, determine, based on the first session parameter, the first session that meets the service requirement of the second terminal device, and forward data of the second terminal device to the network device using the first session.

Abstract: The present disclosure describes a system that attempts to reconcile diverse goals and re-cast the goals into something that is quantifiable and optimizable. One way to reconcile diverse goals is by converting these “constraints”—with the huge problems of feasibility—into errors that can be minimized. This disclosure also presents solutions for rate constraints which previously have not been dealt with. The resulting system enables advertisers to dynamically adjust their campaign based on the needs of the moment. Such a system can have advantages in terms of controllability, smoothness, as well as avoiding hard stop conditions that plague the constraint-based approach. In order to achieve this result, solutions are presented for problems of pacing, viewability prediction, and most particularly, error minimization.

Abstract: A Physical Random Access Channel (PRACH) resource selection method includes a terminal device receiving N synchronization signal blocks (SSBs) from an access device, determining a target PRACH resource selection manner based on at least one of a service type, a type of a trigger event that triggers random access, a signal strength change status of a reference signal received by the terminal device, mobility of the terminal device, and historical information, and selecting, in the determined selection manner, a target PRACH resource from N PRACH resources corresponding to the N SSBs.

Abstract: A method of performing a random access procedure includes randomly selecting a backoff time from within a backoff window ranging from 0 to a specified multiple of a random access preamble unit, waiting until a time initialized with the backoff time expires, and retransmitting a random access preamble.

Abstract: A radio resource configuration adjustment method includes detecting, by user equipment, an overheating problem or that the overheating problem is alleviated, and sending, by the user equipment, a first message to a network device, where the first message is used to notify the network device that the overheating problem occurs in the user equipment or the overheating problem is alleviated; receiving, by the user equipment, a response message sent by the network device, where the response message is used to instruct the user equipment to perform one of the following operations, and the operations include deactivating a secondary serving cell, activating a secondary serving cell, releasing a secondary serving cell, and adding a secondary serving cell; and deactivating, by the user equipment, a secondary serving cell, or activating a secondary serving cell, or releasing a secondary serving cell, or adding a secondary serving cell according to the response message.

Abstract: A method includes: determining, by a first terminal device, a first resource, where the first resource includes one or more of a resource used by a second terminal device to transmit data, a resource reserved by the second terminal device to transmit data, a resource determined based on the resource used by the second terminal device to transmit data, and a resource determined based on the resource reserved by the second terminal device to transmit data; and skipping, by the first terminal device, using a second resource, or reselecting, by the first terminal device, a resource, if the first resource and the second resource overlap.

Abstract: Example methods and apparatus for transmitting ACK/NACK information for data are disclosed. One method includes sending a data packet from a base station to a user equipment. A control signaling is transmitted from the base station to the user equipment and is used to indicate a subframe to be used by the user equipment to send ACK/NACK information corresponding to the data packet.

Abstract: A user apparatus in a mobile communication system includes an allocation means that divides a message that includes control information and data into a plurality of partial messages, and allocates resources included in one or more resource pools to the plurality of partial messages; and a transmission means that transmits the plurality of partial messages using the resources allocated by the allocation means.

Abstract: A service data transmission method, user equipment, and a network device are provided. The method includes: determining, by a network device, a control message used to indicate at least two SPS configurations, and sending the control message to user equipment; and receiving, by the user equipment, the control message sent by the network device, and activating the at least two SPS configurations based on the control message, where each of the at least two activated SPS configurations is used to transmit corresponding service data. In embodiments of the present invention, at least two SPS configurations can be simultaneously performed, thereby improving service data transmission efficiency.

Abstract: A radio resource configuration adjustment method includes detecting, by user equipment, an overheating problem or that the overheating problem is alleviated, and sending, by the user equipment, a first message to a network device, where the first message is used to notify the network device that the overheating problem occurs in the user equipment or the overheating problem is alleviated; receiving, by the user equipment, a response message sent by the network device, where the response message is used to instruct the user equipment to perform one of the following operations, and the operations include deactivating a secondary serving cell, activating a secondary serving cell, releasing a secondary serving cell, and adding a secondary serving cell; and deactivating, by the user equipment, a secondary serving cell, or activating a secondary serving cell, or releasing a secondary serving cell, or adding a secondary serving cell according to the response message.

Abstract: A terminal synchronization method and a terminal relate to the communications field, where the terminal sends synchronization signals in a distributed manner by controlling a sequence for sending the synchronization signals such that terminals in a vehicle to vehicle communications system can have uniform timing. The method includes obtaining, by a terminal, a configurable transmission period for sending a first synchronization signal, and sending, by the terminal, the first synchronization signal based on the configurable transmission period.

Abstract: A data caching method is applied to a first terminal comprising an application processor and a modem processor. The method includes the application processor sending preset path information of a first route to the modem processor, where the preset path information includes a node handover list of the first route, the node handover list includes information about a plurality of nodes, each node corresponds to at least one cell, and information about each node includes a node identifier, a network performance identifier of the node, and a cell identifier corresponding to the node. The modem processor sends first indication information to the application processor, where the first indication information is used to indicate the application processor to cache data, and the first indication information is determined based on the preset path information.

Abstract: A method of performing a random access procedure includes randomly selecting a backoff time from within a backoff window ranging from 0 to a specified multiple of a random access preamble unit, waiting until a time initialized with the backoff time expires, and retransmitting a random access preamble.

Abstract: A communication method includes a terminal device having a dual-card function that obtains, passing through a target section and from a network device, network status information of the target section through which the terminal device is about to pass, and determines, in advance based on the network status information, a target subscriber identity module (SIM) card used when the terminal device passes through the target section. Subsequently, before or when the terminal device passes through the target section, the terminal device can switch to the target SIM card in advance for communication.

Abstract: This application provides communication methods for a terminal device and a network side device. In an example method, a terminal device establishes a primary communication link with a network side device. The terminal device detects one or more other terminal devices, determines, from the one or more other terminal devices, one or more terminal devices as one or more coordinated communication devices, and notifies the network side device of information indicating that a coordinated communication device is used for coordinated communication. The terminal device establishes a device-to-device (D2D)-based virtual multiple-input-multiple-output (MIMO) communication connection with the coordinated communication device, to form, between the terminal device and the network side device, a coordinated communication link relayed by the coordinated communication device.

Abstract: A method includes a first module of a terminal device sends a first request message to a second module, obtains first information from the second module, and assists cell handover based on a first cell handover list. The first request message is used to request the first cell handover list corresponding to a first TAC, which is a TAC of a current cell of the terminal device, and the first information indicates the first cell handover list. The terminal device may store a cell list corresponding to each line in advance. When the terminal device moves on a line, the terminal device may determine, based on the first TAC, the cell list corresponding to the line to perform cell handover.

Abstract: A resource selection method, an apparatus, and a device, where the method includes determining, by first user equipment (UE), parameter information of a sensing window, where the parameter information includes at least one of a start time, a time span, or a quantity, sensing, by the first UE, the resource in the sensing window according to the parameter information of the sensing window, and selecting, by the first UE, a resource according to a sensing result.

Abstract: Embodiments of the present invention disclose a communication method and a communications apparatus. In the communication method, a network-side device determines a resource configuration policy. The network-side device determines an operation mode of a terminal based on the resource configuration policy; broadcasts information about a plurality of configured resource pools and the operation mode, so that the terminal performs sending based on the configured one or more resource pools; and determines, based on the operation mode, that the terminal sends information on one or more resource units of the plurality of resource pools. According to the communication method and the communications apparatus provided in the specific embodiments of the present invention, the one or more resource pools are configured for a plurality of carriers for inter-terminal communication, so that the terminal can send a message on the one or more resource pools of the plurality of carriers.

Abstract: A method of performing a random access procedure includes randomly selecting a backoff time from within a backoff window ranging from 0 to a specified multiple of a random access preamble unit, waiting until a time initialized with the backoff time expires, and retransmitting a random access preamble.