Abstract: This application provides a communication method and apparatus, to improve communication efficiency of a terminal device. The method includes receiving, by a terminal device, first signaling, and sending first uplink data in response to the first signaling. The terminal device receives second signaling, and sends second uplink data in response to the second signaling. A time interval between the second signaling and the first signaling is less than processing time for the first uplink data. The first signaling carries a first process number, and the second signaling carries a second process number. Both the first signaling and the second signaling are for paging a terminal device. Alternatively, both the first signaling and the second signaling indicate a time/slot resource used for random access. In the foregoing manner, a delay between two inventory events can be reduced, thereby increasing an inventory rate.

Abstract: This application relates to the field of communications technologies, and in particular, to a communication method and apparatus, which are used to resolve a problem of how a terminal device integrated with two or more capabilities communicates with a network device. The method includes: receiving a paging message, where the paging message is used to page a first-type terminal device, and the first-type terminal device has at least two working modes of an Ambient Internet of Things (IoT) terminal device; and if the first-type terminal device has at least two working modes of the ambient IoT terminal device, sending a random access request. By indicating the type of the terminal device (that is, the terminal device having a dual-mode (or multi-mode)) to be paged in the paging message, the network device can obtain the capability of the terminal device.

Abstract: A communication method and apparatus are provided. The method includes: A terminal device sends first information to a network device or receives second information from the network device, and starts a first timer; and when determining that the first timer expires and that no third information is received from the network device, the terminal device performs one or more of the following: disconnecting, at an AS, from the network device; or entering a first state. When in the first state, the terminal device responds only to a paging message or a downlink trigger message, where the downlink trigger message includes a query message or a select message. Compared with a manner in which a transmission terminal device determines link quality based on measurement of a reference signal received power, that the terminal device determines, based on the first timer, whether a link is abnormal is simpler, thereby reducing processing complexity.

Abstract: In a packet loss indication method, a user plane function (UPF) entity receives first indication information from a first base station, where the first indication information indicates that a first data packet was unsuccessfully sent, and that the first data packet was unsuccessfully sent includes that the UPF entity unsuccessfully sent the first data packet to the first base station or the first base station unsuccessfully sent the first data packet to a first terminal device. Second indication information is sent to a second base station, where the second indication information indicates that the first data packet was unsuccessfully sent.

Abstract: An access method includes sending a first random access request to a network device. The access method also includes receiving a random access response message from the network device. The random access response message includes first acknowledgment information and second acknowledgment information. The first acknowledgment information indicates that random access of a first terminal device corresponding to the first random access request succeeds.

Abstract: A communication method and apparatus, and relate to the communication field. Scheduling based on a QoS parameter can be implemented on a terminal device with low complexity. A quality of service QoS parameter for a first service from a core network element is received. At least one terminal apparatus is paged for executing the first service. Scheduling based on the QoS parameter in response to the at least one terminal apparatus for executing the first service being paged, the at least one terminal apparatus executes the first service.

Abstract: In an implementation, an apparatus sends a paging message to a terminal device, where the paging message is used to page the terminal device The apparatus further sends scheduling information to the terminal device, The scheduling information is used to schedule a resource for transmission of first data. The resource is determined based on a data size indicated by first information. The first information is from a core network device.

Abstract: A paging method includes determining a first time window and receiving a paging message in the first time window. The first time window is useable to page at least one group of terminal devices. The paging message is useable to page a first group of terminal devices. The first group of terminal devices are a first group of ambient internet of things (A-IoT) terminals. The paging message comprises an identifier of the first group of terminal devices.

Abstract: In an indication information receiving method, a first terminal device receives first indication information from a first network device, and sends information about at least one HARQ process of the first terminal device to the first network device based on the first indication information, where the information about the at least one HARQ process includes a process number of a first HARQ process. The first terminal device receives first data from the first network device through the first HARQ process. This can improve reliability during data transmission.

Abstract: A communication method and apparatus are provided, to provide a relay service for an AIOT terminal by using a relay apparatus. According to the method, the relay apparatus sends first information to a core network apparatus, where the first information is used to request to provide the relay service for the AIOT terminal, and/or indicates that the relay apparatus supports providing the relay service for the AIOT terminal. An access network apparatus may receive third information from the core network apparatus, to indicate that the relay apparatus provides the relay service for the AIOT terminal. The relay apparatus may further receive configuration information of the relay service from the access network apparatus. According to the method, the relay apparatus may obtain, from the access network apparatus, the configuration information required for providing the relay service for the AIOT terminal.

Abstract: This application provides a communication method and apparatus, and relates to the field of wireless communication technologies. In this application, occurrence of a terminal apparatus staying on a first link for a long time can be reduced, enabling the terminal apparatus to receive scheduling information of a network apparatus in a timely manner, and helping reduce a service delay. The method includes: A terminal apparatus monitors a low-power wake-up signal LP-WUS from a network apparatus on a first link. The terminal apparatus monitors a physical downlink control channel PDCCH from the network apparatus on a second link under a first condition. The first condition includes at least one of the following: a first moment arrives, where the first moment is one of periodic moments; or no LP-WUS is detected on the first link within first duration.

Abstract: This application provides a communication method and a communication apparatus, applicable to scenarios of combination use of a low-power wake-up signal (LP-WUS) and a paging early indication (PEI), to reduce paging false alarms by monitoring a paging message in a dual-layer grouping manner. In the method, a first wake-up signal is first received by using a first receiver having relatively low operating power, and then a second wake-up signal is received by using a second receiver having relatively high operating power, to monitor paging based on the second wake-up signal.

Abstract: A method includes selecting a first random-access resource set when a first condition is met. The first condition is that a first feature of a first-type terminal device is applicable to a current random-access procedure, and a first resource and the first random-access resource set are provided. The first resource is a contention-free random-access resource, and the first random-access resource set is associated with only the first feature. A second random-access resource set is selected when the first condition is not met and a second condition is met. The first condition is not met and the second condition is met when the first feature is applicable to the current random-access procedure, the first random-access resource set is not provided, and the first resource and the second random-access resource set are provided. The second random-access resource set is associated with only a second feature of a second-type terminal device.

Abstract: A communication method and a communication apparatus. A first signal is received from a network device, where the first signal is useable for time synchronization, and the first signal is useable to indicate at least one time unit in a first time period. First data is sent to the network device in a first time unit, where the first time unit is one of the at least one time unit. A terminal device determines the first time unit based on the first signal, and sends the first data in the first time unit.

Abstract: A data transmission method and a communication apparatus are disclosed. According to the method: A first communication apparatus obtains first data and second data, where the first data supports transmission error correction based on a meaning represented by data, and the second data does not support transmission error correction based on a meaning represented by data. The first communication apparatus sends encoded data to a second communication apparatus, where the encoded data is obtained by encoding a transport block, the transport block includes the first data and the second data, a code rate of the first data is a first code rate, a code rate of the second data is a second code rate, and the first code rate is greater than the second code rate. In this way, data transmission efficiency can be improved, and resource waste can be reduced.

Abstract: Embodiments of this application provide a communication method and apparatus and system configured to execute the method, which may include receiving a first message from a second network device by using a first access technology. The first message is configured for paging. The first message includes first information. The first information is configured to indicate a second access technology. Sending a second message by using the second access technology. The second message is configured for paging a terminal device.

Abstract: A data transmission method and a device thereof are provided for tag access. The provided method includes: An answer device receives first signaling sent by a read/write device. The first signaling carries target flag information. The target flag information is used to determine the answer device. First flag information of the answer device matches the target flag information. The answer device determines a first slot, and sends first access information to the read/write device in the first slot. In the provided method, the first slot is determined, to avoid collision of different slots in a same slot in a next round, reduce a collision probability, and improve tag access efficiency.

Abstract: A communication method and apparatus are provided. The method includes: A second communication apparatus (for example, a reader) sends first signaling to indicate a quantity N of random access occasions, where N is a positive integer. In addition, the second communication apparatus further sends second signaling, where the second signaling includes first information, the first information indicates a number of a first random access occasion, and the number of the first random access occasion is less than or equal to N?1. A first communication apparatus (for example, a tag) receives the first signaling and the second signaling, and determines, based on the first information, whether to initiate random access on the first random access occasion.

Abstract: A data transmission method and apparatus, a terminal, a network device, and a storage medium. A network device sends a first signal to a terminal usable to indicate a plurality of sending windows. Based on this, the terminal sends uplink data to the network device based on the sending window indicated by the first signal.

Abstract: This application provides a communication method, apparatus, and system, and belongs to the field of communication technologies. In the method, a network device may send first indication information to a terminal based on service requirements of different services, to indicate the terminal to enter a first sleep mode whose wake-up duration matches a service requirement of the terminal, so that even if the terminal is woken up in the first sleep mode, subsequent data transmission of the terminal can still meet the service requirement of the terminal.