Abstract:
Embodiments of this application provide a beam training method and an apparatus, to improve beam training performance. The method includes: The first apparatus determines a quasi co-location assumption of a first reference signal, and receives, based on the quasi co-location assumption of the first reference signal, the first reference signal sent by a second apparatus. The quasi co-location assumption meets at least either of the following conditions: A plurality of periodic instances of the first reference signal at an interval of N periodicities have a same quasi co-location assumption, where N is an integer greater than 0; and first reference signals that have different indexes and that are in a same resource set have different quasi co-location assumptions.
Abstract:
This application provides an information transmission method and apparatus. The method includes: A terminal device generates first indication information, the first information includes at least one or more of information about a number of ports, information about a number of resources. The first information is associated with the resource pair information. The terminal device sends the first indication information.
Abstract:
This application relates to the communication field, and in particular, to a beam indication method and apparatus, and a terminal. The method includes: obtaining a unified TCI state pool, where the unified TCI state pool is used for a separate TCI state pool or a joint TCI state pool; and performing separate or joint TCI state indication based on the unified TCI state pool.
Abstract:
This application provides a reference signal transmission method and an apparatus, to resolve a prior-art problem of relatively high overheads of resources occupied by transmitted reference signals in a communications system. The method includes: configuring, by a transmitting device, one reference signal group corresponding to one port in the first time symbol, and configuring one reference signal corresponding to the port in each of time symbols except the first time symbol. This reduces overheads of resources occupied by transmitted reference signals in the communications system and improves service data transmission efficiency while ensuring that a receiving device can obtain a channel parameter of the port.
Abstract:
A training packet sending method and apparatus, where the method includes generating, by a first device, a training packet, where the training packet includes a preamble, a header, and a training field, and the header includes at least a legacy header, and repeatedly sending, by the first device, the preamble using N channels, sending the legacy header in the header using the N channels, and sending the training field to at least one second device using H channels of the N channels, where N is greater than 1, and H is greater than 1 and less than or equal to N.
Abstract:
The present invention discloses a channel state information (CSI) feedback method. The CSI feedback method includes: receiving, by user equipment (UE), a reference signal broadcast by a base station; performing channel estimation on a radio channel between the base station and the UE by using the reference signal, to obtain CSI and a channel quality parameter; adjusting the channel quality parameter according to a channel quality weight parameter, to obtain a channel statistic quality parameter; and when the channel statistic quality parameter exceeds a channel quality threshold, feeding back the CSI to the base station. In the present invention, because a channel quality parameter is dynamically adjusted by using a channel quality weight parameter, and it is selected, according to a result of comparing an adjusted channel statistic quality parameter with a channel quality threshold, whether to report CSI. UEs in a system can be evenly scheduled.
Abstract:
A method, a system and an apparatus can be used for transmitting data in a CA manner. A first base station currently serving a user equipment (UE), creates EPS bearers under different component carriers CC Groups for the UE. The UE sets different access stratum entities corresponding to the CC Groups to process data in the process of creating the EPS bearers. The UE determines, when transmitting or receiving data, a corresponding CC Group according to an EPS bearer that bears the data. An access stratum entity corresponding to the CC Group processes the data that needs to be transmitted or received, a site is a first base station currently serving the UE or a second base station currently serving the UE.
Abstract:
A method and a device for policy based routing. The method comprises: setting interfaces of router(s) to be multiple redirection groups, the redirection groups being ordered according to a priority order; detecting interface states of interfaces in the redirection groups; and switching traffic among the multiple redirection groups according to the interface states of the interfaces in the redirection groups. With the adoption of the method and the device of the embodiments of the present disclosure, paths passing through other operators may be optionally preferred and operating costs are saved; and moreover, by configuring multi-level policy based routing, the reliability of data transmission is enhanced, and the networking of the operator is more flexible.
Abstract:
A handover method and a base station are provided. The handover method may include: when a UE needs to be handed over, obtaining bearer context information of the UE in a first base station; sending a handover request to a target base station, where the handover request carries the bearer context information; and after receiving a handover response that is returned by the target base station and indicates that the handover is agreed to, sending a handover command to the UE so that the UE is handed over to the target base station. Based on the above technical solutions, the UE handover can be implemented quickly in the case of using multiple carriers and the current service of the UE can be recovered quickly, which can improve communication experience of a user.
Abstract:
This application provides a method for reporting a terminal device capability and a communications apparatus. The method includes: The terminal device generates first indication information and sends the first indication information to a network device. The first indication information is used to indicate one or more frequency domain parameters and one or more of the following capability parameters associated with each frequency domain parameter: a port quantity, a spatial domain parameter, a reference signal resource quantity, and a total port quantity. The frequency domain parameter is used to indicate a maximum quantity of frequency domain units that can be supported by the terminal device. The frequency domain unit is a frequency domain unit based on which the terminal device feeds back a PMI. Each capability parameter group may be used to indicate one combination of a plurality of parameters that can be supported by the terminal device.