Abstract: In a multi-connectivity scenario, a terminal may use a plurality of communication connections for communication. The plurality of communication connections may belong to different cells. The different cells may correspond to different timing advances (TAs). In a terrestrial network, a TA is determined by a base station. Therefore, the base station can determine TAs of different cells in a multi-connectivity scenario. However, in an non-terrestrial network (NTN), a TA is determined by a terminal. After receiving the TA, a base station cannot determine a cell corresponding to the TA in a multi-connectivity scenario. In embodiments, when a terminal sends a first TA of a first communication unit, a first identifier is carried. After receiving first information, a base station parses the first information to obtain the first TA and the first identifier, and may determine, based on the first identifier, the first communication unit corresponding to the first TA.

Abstract: Embodiments of this application provide a non-terrestrial network communication method and a related apparatus. The method includes: A first network device obtains first configuration information of a first cell, where the first cell is a cell of the first network device; and the first network device sends the first configuration information to a second network device, where the first configuration information includes a first identifier and/or related information of a physical broadcast channel PBCH of the first cell, and the first identifier identifies system information of the first cell. In a regenerative satellite working scenario, handover without L3 signaling is implemented, to reduce signaling overheads, avoid a signaling storm caused by handover, and improve communication efficiency.

Abstract: Embodiments of this application provide a measurement configuration method and apparatus. The method includes: receiving, by a first terminal device, first configuration information, wherein the first configuration information is used by the first terminal device to perform a first measurement on at least one neighboring cell, and the first measurement is measuring time domain information in which reference signals of the at least one neighboring cell are respectively located; and then sending, by the first terminal device, target measurement information that includes the time domain information in which the reference signals of the at least one neighboring cell are respectively located to a corresponding access network device.

Abstract: A communication method, a synchronization method, and a communication apparatus, where the communication method includes: A terminal receives first information, where the first information indicates the terminal to hand over to a first cell, and the first information includes a plurality of sets of ephemeris-related information corresponding to the first cell; the terminal determines to hand over to the first cell and change to first ephemeris-related information corresponding to the first cell, where the first ephemeris-related information is one of the plurality of sets of ephemeris-related information; and the terminal accesses the first cell based on the first ephemeris-related information.

Abstract: A cell handover method, a device, and a system are provided. The method is applied to a first base station and includes: when it is determined that a user equipment (UE) needs to be handed over from a first cell to a second cell, determining whether the UE is allowed to use a first radio resource configuration in the second cell, where the first radio resource configuration is allocated by the first cell to the UE. When the UE is allowed to use the first radio resource configuration in the second cell, sending a first handover command to the UE, where the first handover command instructs the UE to use the first radio resource configuration in the second cell. According to the foregoing method, network overhead can be reduced.

Abstract: A communication method and apparatus are provided, to configure, for each terminal device, a measurement configuration parameter adapted to a status of the terminal device, thereby improving efficiency of cell measurement performed by the terminal device and reducing measurement power consumption of the terminal device. In this application, the method includes: An access network device receives assistance information from a terminal device, and, based on the assistance information, it determines measurement configuration information, which includes at least one measurement configuration parameter and an activation condition for the at least one measurement configuration parameter, and which is used by the terminal device to perform cell measurement. The access network device then sends the measurement configuration information to the terminal device, and the terminal device performs cell measurement based on the measurement configuration information.

Abstract: The method is performed by a terminal device or a chip used in a terminal device. The method includes: receiving first system information from a network device, where the first system information includes a first condition, the first condition is used by the terminal device to determine whether to receive and/or read second system information, and the second system information includes ephemeris information configured by the network device; determining whether the first condition is met; and receiving and/or reading the second system information when the first condition is met. In embodiments of this application, the terminal device may receive and/or read the second system information only when the first condition is met, that is, receive and/or read the ephemeris information only when the first condition is met, thereby reducing ineffective reading of the ephemeris information, and reducing measurement power consumption of the terminal device.

Abstract: A communication method and a communication device, applicable to a random access channel less handover scenario. In the method, after receiving a handover request acknowledgement message, a source access network device can send, to at least one candidate access network device, indication information of at least one beam measured by a terminal device. In this way, resource utilization can be improved while flexibility of scheduling resources by an access network device is improved.

Abstract: Embodiments of this application provide a method for reporting a timing advance and a communication apparatus, to implement reporting of the timing advance in a cell handover process. The method includes: receiving a handover command from an access network device, where the handover command indicates a terminal device to be handed over from a source cell to a target cell; and triggering the reporting of the timing advance when the handover command carries first indication information and/or second indication information, where the timing advance is a timing advance corresponding to the target cell, the first indication information indicates an offset threshold of the timing advance reported by the terminal device, and the second indication information indicates the terminal device to report the timing advance.

Abstract: A communication method and apparatus to resolve a problem that in non-terrestrial network communication, because a terminal performs measurement on all candidate cells configured by a network device, measurement redundancy exists, resulting in energy waste of the terminal. The method includes: a network device determines at least one candidate cell, and sends first indication information to the terminal, where the first indication information indicates a condition for the terminal to perform measurement on at least one candidate cell.

Abstract: A cell reselection method and an apparatus. The method includes measuring a target cell to obtain a first measurement result in a first time period; determining a second measurement result of the target cell in a second time period based on an AI model, where input information of the AI model includes the first measurement result, and an end moment of the second time period is later than an end moment of the first time period; and performing reselection from a serving cell to the target cell if signal quality of the target cell in the second time period satisfies a preset condition, where the signal quality is determined based on the second measurement result. In this way, a terminal device can determine to perform reselection to the target cell, improving cell reselection efficiency and reducing power consumption of the terminal device.

Abstract: This application relates to the field of communication technologies, and discloses a communication method, apparatus, and system. The method includes: A terminal determines predicted values of first-type measurement quantities of a plurality of cells at at least one time point in a first time period, where the plurality of cells include a serving cell and a candidate cell; and if the predicted values of the first-type measurement quantities of the plurality of cells at the at least one time point satisfy a reporting condition, sends measurement report information to a network device.

Abstract: Embodiments of this application provide a handover method and an apparatus and system for executing the method. The method may include receiving a handover request message from a second access network device. The handover request message includes time information of a terminal device to be handed over to a first access network device. The method may further include sending a path switch request message to a core network device. The path switch request message is sent between receiving the handover request message and receiving a handover complete message.

Abstract: This application provides a communication method and apparatus. The aforesaid includes a first access network device sending, to one or more terminal devices, first information used to determine a terminal device set to which each of the one or more terminal devices belongs, the one or more terminal devices sending, to the first access network device, second information indicating a terminal device set to which the terminal device belongs, the first access network device sending a handover request message to a second access network device based on the second information, where the handover request message includes identification information and/or a quantity of terminal devices in a first terminal device set, and the first access network device receiving a handover request acknowledgment message from the second access network device, and broadcasting handover indication information, where the handover indication information indicates the terminal device in the first terminal device set to perform handover.

Abstract: An optical transmission system is provided. The optical transmission system includes a first board card including a multiplexer/demultiplexer, and an optical amplifier. The multiplexer/demultiplexer is configured to receive a plurality of first split optical signals and combine the received plurality of first split optical signals into a first combined optical signal, and the optical amplifier is configured to amplify power of the first combined optical signal.

Abstract: The present disclosure generally provides methods. The methods include exposing a substrate in a processing chamber to a deposition precursor to form a first film. The first film having a first dielectric constant, a first leakage current, a first breakdown voltage, and a first hardness. The first film is exposed to a reactive precursor to form a second film. The second film having a second dielectric constant, a second leakage current, a second breakdown voltage, and a second hardness, wherein the reactive precursor comprises an oxygenated precursor. The second film is exposed to a UV light source to form a third film. The third film having a third dielectric constant, a third leakage current, a third breakdown voltage, and a third hardness.

Abstract: The present invention relates to a timestamp-free synchronization clock parameter tracking method based on extended Kalman filter, and belongs to the technical field of wireless sensor networks. With a first order Gauss Markov model and a clock model as a state equation, evolution processes of clock skew and instantaneous clock offset is described. Then an observation equation constituted by observation models of timestamp-free synchronization and instantaneous clock offset is established, and clock skew and instantaneous clock offset are jointly tracked by a tracking method based on extended Kalman filter to realize synchronization between a node to be synchronized and a reference clock node. The method can track two time-varying parameters simultaneously by following a network data flow without needing a dedicated synchronization frame to exchange synchronization information, which reduces energy consumption and improves synchronization precision.

Abstract: A method for modulating the coefficient of thermal expansion (CTE) of dielectric films on a substrate is provided. In some embodiments, the method includes positioning a substrate within a processing chamber, forming a dielectric film stack on the substrate, and curing the dielectric film with a UV source to modify a CTE of the dielectric film.

Abstract: Embodiments of the present specification provide an active optical cable, an optical communication network and an optical communication method, where according to different connection requirements of a server node and a switch node, the active optical cable is set with optical transceiving apparatuses based on different signal processing technologies at two ends of an optical communication medium, i.e., a first optical transceiving apparatus and a second optical transceiving apparatus. Considering that a network card of the server node is small and signal integrity is easy to ensure, therefore, a signal processing technology used by the first optical transceiving apparatus connected to the server node does not include a digital signal processing technology with high power consumption and cost (i.e.

Abstract: Embodiments include semiconductor processing methods to form low-? films on semiconductor substrates are described. The processing methods may include flowing one or more deposition precursors to a semiconductor processing system. The one or more deposition precursors may include a silicon-containing precursor that may be a cyclic compound. The methods may include generating a deposition plasma from the one or more deposition precursors. The methods may include depositing a silicon-and-carbon-containing material on the substrate from plasma effluents of the deposition plasma. The silicon-and-carbon-containing material as-deposited may be characterized by a dielectric constant less than or about 3.0.