Abstract:
In a measurement method, a base station, and a user equipment, the measurement method includes: sending, by a base station, signaling to a user equipment, where the signaling carries node indication information, where the node indication information is used to indicate nodes corresponding to channel state information measurement sets configured by the base station for the user equipment. In this way, the user equipment can learn, according to the node indication information, the nodes corresponding to the channel state information measurement sets configured by the base station for the user equipment; then, the user equipment can measure the nodes corresponding to the channel state information measurement sets on the channel state information measurement sets configured by the base station for the user equipment and provide feedback, so that the base station can schedule the user equipment according to a measurement result of the user equipment.
Abstract:
This application provides a switching method, it is determined that a switching delay of a first terminal device switching from a first bandwidth unit to a second bandwidth unit is a first delay, where the first delay is less than a second delay, and the second delay is a switching delay supported by a second terminal device. Alternatively, it is determined that a switching delay of a first terminal device switching from a first bandwidth unit to a second bandwidth unit is one of N delays, where the N delays are switching delays supported by the first terminal device, N is an integer greater than or equal to 2, and the N delays include a first delay. Therefore, switching between bandwidth units may be performed more quickly. In this case, the first terminal device may quickly perform dynamic data transmission within a large system bandwidth.
Abstract:
The present disclosure provides example signal sending and receiving methods, apparatuses, and devices. One example signal sending method includes a network device sending a first wake-up signal to indicate a terminal device to receive a first data channel, where the first data channel carries at least one of a paging message or a short message, and the short message indicates at least one of whether a system message changes or whether to receive earthquake and tsunami warning system (ETWS) information or commercial mobile alert service (CMAS) information. The first data channel is sent by the network device.
Abstract:
A communication method and apparatus relate to the field of communication technologies, to enable a network device to support communication of a new type of terminal device without additionally sending a set of complete system information. The method includes: The network device sends a SIB1 and supplementary information. Maximum transmission bandwidth of a first terminal device is different from that of a second terminal device. The supplementary information includes first information and/or second information, the SIB1 does not include the first information, and a parameter value of the second information included in the supplementary information is different from a parameter value of the second information included in the SIB1. After receiving the SIB1 and the supplementary information, the second terminal device accesses a network based on partial information other than the second information in the SIB1 and the supplementary information. Consumed resources for downlink transmission can be reduced.
Abstract:
This application provides a data transmission method. The method includes: A terminal device receives first control information sent by a network device, where the first control information indicates configuration information of the terminal device or used to indicate BWP switching information used by the terminal device to perform BWP switching. When the first control information indicates the configuration information, the terminal device performs information configuration based on the configuration information. When the first control information indicates the BWP switching information, the terminal device performs BWP switching based on the BWP switching information. According to the method provided in embodiments of this application, the terminal device may obtain the configuration information or the BWP switching information by detecting only the first control information. This avoids a problem of high power consumption caused by the terminal device detecting DCI in a plurality of formats or keeping enabling detection in timing duration.
Abstract:
This application provides a synchronization signal transmission method and a communications apparatus. The synchronization signal transmission method and the communications apparatus are applied to the communications field. In the synchronization signal transmission method, a synchronization signal generated and sent by a network device may include a first sequence and a second sequence. The first sequence is a first complex sequence or a sequence obtained based on the first complex sequence. The second sequence is a sequence obtained based on the first complex sequence, and the second sequence is different from the first sequence. Because a correlation processing result between the first sequence and the second sequence is still a complex sequence, there is a good correlation property, so that a terminal device can obtain a relatively sharp correlation peak when synchronizing with the network device based on the synchronization signal, thereby effectively shortening duration required for synchronization.
Abstract:
This application relates to the field of communications technologies, and discloses a data transmission method, a corresponding network device, and a corresponding terminal device, to resolve a problem that a terminal device with a limited bandwidth, such as an mMTC terminal, cannot access a network device in an NR system in the conventional technology. In this application, the network device sends, to different terminal devices, first information related to configuration information that is for accessing the network device, so that different types of terminal devices having different transmission bandwidth capabilities use, based on specific conditions of the terminal devices, parsing manners that are suitable for the terminal devices, to obtain specific configuration information that is for accessing the network device and that is suitable for the terminal devices, so as to access the network device.
Abstract:
A method for measuring channel state information and a related device are disclosed. The method may include: determining, by a terminal device, a first frequency resource, where Z subbands included in the first frequency resource are determined by a network device in a first time unit in Y subbands included in a second frequency resource, the second frequency resource is a downlink frequency resource allocated by the network device to the terminal device, the Y subbands are included in the X subbands, and the second frequency resource corresponds to one piece of wideband channel state information CSI, where X≥Y≥2, Y>Z≥1, and X, Y, and Z are all integers; determining, by the terminal device, the wideband CSI based on the first frequency resource; and sending, by the terminal device, the wideband CSI to the network device in a second time unit.
Abstract:
A data transmission method and a communications device resolve an existing problem that use of an unlicensed spectrum is interfered with between LTE devices when a padding is sent. The method includes: performing, by a communications device, CCA on an unlicensed spectrum; and when determining that the unlicensed spectrum is in an idle state, sending, by the communications device on a preset band resource in the unlicensed spectrum, a signal indicating that the communications device uses the unlicensed spectrum, where the preset band resource is a partial band resource in the unlicensed spectrum. Mutual interference between communications devices when the unlicensed spectrum is used is eliminated.
Abstract:
Embodiments of the present invention provide a method, a user equipment, and a base station for transmitting subframe information. The method includes: by using radio resource control RRC dedicated signaling, or media access control MAC signaling, or physical layer control signaling, obtaining first information that indicates subframe configuration from a base station; and determining, according to the first information, the subframe configuration, where the subframe configuration identifies a subframe type of a subframe in a subframe set, where the subframe includes at least one first power subframe, and the first power subframe is a subframe for sending data or a control signal by using a low power or a zero power. In the embodiments of the present invention, a base station transmits information that indicates subframe configuration to a UE, so as to enable the UE to recognize different subframe types.