Abstract: The present application relates to an authentication method. The method comprises: transmitting, by a target second device, an authentication request to a first device; wherein the target second device is one of a plurality of second devices.

Abstract: A data transmission method performed by a terminal device includes: performing, in response to arrival of first data at the terminal device during a small data transmission (SDT) procedure, sending a first data arrival indication through uplink SDT, thereby causing the terminal device to enter a connected state; and sending, by the terminal device in the connected state, the first data; where the SDT procedure is a data transmission procedure of the terminal device in an inactive state, and the first data includes data not supporting transmission in the SDT procedure; the first data arrival indication is used for notifying a network device that the first data arrives at the terminal device, and the uplink SDT is uplink data transmission in the SDT procedure.

Abstract: An authentication method performed by a first device includes: obtaining identity information of a plurality of target devices; and transmitting a first message to a second device, where the first message carries the identity information for authenticating the plurality of target devices.

Abstract: A wireless communication method, a terminal device, and a network device are provided. The wireless communication method includes a terminal device acquires first information of a first cell. The first information is acquired based on a first request message from the terminal device. Or, the first information is broadcasted/indicated by a second cell.

Abstract: A method for sending a handover success report includes: sending the handover success report in a case that Conditional Handover (CHO) is successful, wherein the handover success report includes at least one of: signal measurement results of neighbor cells by the terminal device; signal measurement results of candidate cells that do not meet a handover condition by the terminal device; a list of candidate cells that meet the handover condition; a list of the candidate cells that do not meet the handover condition; an Identity (ID) of a source cell; information indicating whether a Radio Link Failure (RLF) occurred in the source cell before the terminal device performs the CHO; or a duration from receiving a CHO configuration to triggering the CHO.

Abstract: Provided are a BWP configuration method and apparatus, a terminal device, and a network device. The method comprises : a terminal device receiving first configuration information sent by a network device, wherein the first configuration information comprises a plurality of pieces of initial BWP configuration information, and each piece of initial BWP configuration information in the plurality of pieces of initial BWP configuration information is associated with one terminal type and/or terminal capability; and the terminal device selecting first initial BWP configuration information from among the plurality of pieces of initial BWP configuration information on the basis of the first configuration information, and residing on a first initial BWP on the basis of the first initial BWP.

Abstract: A method and device for transmitting a medium access control (MAC) protocol data unit (PDU) is provided. The method includes: identifying, by a hybrid automatic repeat request (HARQ) entity, for an uplink grant, a HARQ process associated with the uplink grant; and obtaining, by the HARQ entity, a MAC PDU to transmit from a HARQ buffer of the identified HARQ process when a particular condition(s) is satisfied. The condition may be that a MAC entity of the HARQ entity is configured with priority based prioritization, the uplink grant is a configured grant, and a previous uplink grant for the HARQ process was de-prioritized and the MAC PDU had already been obtained for the HARQ process.

Abstract: Embodiments of this application provide a communication method, a communications apparatus, a communications device, and an access network architecture, where the method includes: receiving, by a first node, data transmitted by a terminal device, performing transmission-related processing on received data by using a first protocol stack, and transmitting the processed data to a second node; and/or, receiving, by a first node, data transmitted by a second node, performing transmission-related processing on the received data by using a first protocol stack, and transmitting the processed data to a terminal device.

Abstract: The disclosure relates devices and a network element. A first device calculates third authentication information based on a first key, where the first key is related to a shared key. The first device sends a second message, where the second message carries the third authentication information.

Abstract: A communication method, a device, a computer-readable storage medium, a computer program product, and a computer program are provided. The method includes the following. A first device receives a first message, where the first message carries a nonce and first authentication information. The first device calculates a first key and second authentication information based on a first shared key and the nonce. When the first authentication information is the same as the second authentication information, the first device calculates ciphertext data based on the first key and data to be sent. The first device sends a second message, where the second message carries the ciphertext data.

Abstract: Provide are a small data transmission method and apparatus, and a terminal device. The method includes: the terminal device determines a first data amount, which includes a data amount of radio resource control (RRC) messages and a data amount of at least one data radio bearing (DRB) cache; and the terminal device determines, based on the first data amount, whether to initiate an inactive state small data transmission.

Abstract: A key generation method, a first device, and a target second device are provided. The method includes: sending, by a first device, multiple signals to each of multiple second devices, where radio frequency (RF) coefficients for the multiple signals are calculated based on a respective channel feature between each of the multiple second devices and the first device; and generating, by the first device, a first group key based on related information of the multiple signals, where the first group key is used by the first device to communicate with the multiple second devices.

Abstract: Embodiments of the disclosure provide a measurement gap determining method and apparatus, and a terminal. The method comprises: the terminal receives first configuration information and/or second configuration information sent by a network device, wherein the first configuration information is used for the terminal to determine a first measurement gap used before BWP switch and a second measurement gap used after the BWP switch, and the second configuration information is used for the terminal to determine a first measurement gap sharing scheme used before the BWP switch and a second measurement gap sharing scheme used after the BWP switch.

Abstract: The present disclosure relates to a global train-localization system. The system may autonomously send a precise location of a train to effectively cope with train location recognition in a case of various faults or degradations. The localization system includes: a backup localization unit installed on the train and configured to read beacon location information on a track; and a global train-localization system (GTS) server configured to receive, store and convert train localization information sent by the backup localization unit and to perform output and display. Compared to the prior art, the present disclosure has the advantages of effectively coping with system degradation, namely, tracking the location of the train in real time even in a case of complete fault of a signal system, etc.

Abstract: Provided are communication methods and communication devices. One method comprises: on the basis of a shared key, a first device generates a first key; the first device receives a second random number of a second device; on the basis of the first key, the first device generates first authentication information of the first device; and the first device sends a first message to the second device, the first message comprising the first authentication information, and the first authentication information being generated according to one or more of the following information: device information, service-related information, an identifier of a device forwarding the first message, and a first random number and a second random number of the first device.

Abstract: A data transmission method and a terminal device are provided. The method includes: in response to that a terminal device selects to perform a data transmission in an inactive state based on a preconfigured uplink resource, sending, by the terminal device, uplink information to a network device. The uplink information includes at least uplink data to be sent by the terminal device, or the uplink information includes at least the uplink data to be sent by the terminal device and identity information of the terminal device.

Abstract: A data transmission method performed by a terminal device includes: performing, in response to arrival of first data at the terminal device during a small data transmission (SDT) procedure, a target interaction with a network device, thereby causing the terminal device to enter a connected state; and transmitting, by the terminal device in the connected state, the first data; where the SDT procedure is a data transmission procedure of the terminal device in an inactive state, and the first data includes data not supporting transmission in the SDT procedure.

Abstract: Embodiments of the present application provides a signal transmission method, a network device, and a terminal device, the method comprising: the network device transmits a first indication signal to the terminal device, the first indication signal being used for determining, by the terminal device, whether to perform downlink control channel monitoring in a search space associated with the first indication signal.

Abstract: Provided are a wireless communication method and apparatus. The method includes: a first communication device receiving first information, where the first information is used for determining a first beam, which is used for sending or receiving a sensing signal. Thus, a first communication device can determine, on the basis of first information, a first beam for sending or receiving a sensing signal, such that it is ensured that the determined first beam is more accurate, thereby providing basic conditions for the first beam to be better directed at a sensing target.

Abstract: Embodiments of the present application provide a small data transmission method and apparatus, and a terminal device. The method comprises: the terminal device determines a first data amount, which comprises a data amount of radio resource control (RRC) messages and a data amount of at least one data radio bearing (DRB) cache; and the terminal device determines, based on the first data amount, whether to initiate an inactive state small data transmission.