Abstract:
Embodiments of this application provide an EIRP control method and a communications apparatus. In this solution, an EIRP threshold of a spatial grid may be determined, where the EIRP threshold of the spatial grid is related to a safety distance of the spatial grid; and a plurality of beams are controlled, so that a total EIRP of the plurality of beams in the spatial grid is less than or equal to the EIRP threshold. According to the foregoing solution, a total EIRP of each spatial grid may be controlled, at a granularity of a spatial grid, to not exceed an EIRP threshold of the spatial grid, so that deployment of a MIMO access network device satisfies an EMF strength requirement specified by each country/region.
Abstract:
This application provides a wireless charging foreign object detection apparatus, applied to the field of wireless charging technologies. The detection apparatus includes: an excitation coil configured to provide a time-varying magnetic field, detection coils configured to detect a foreign object, and a processor configured to determine whether a foreign object exists. The detection coils may include two detection coils, or may include at least three detection coils. The at least three detection coils may be further configured to eliminate a detection blind spot.
Abstract:
An interference determining method, includes: obtaining first frequency information of a first resource; obtaining second frequency information of a second resource, where a frequency indicated by the first frequency information is lower than a frequency indicated by the second frequency information; determining, based on the first frequency information, harmonic frequency information corresponding to the first resource; and determining, based on the harmonic frequency information and the second frequency information, harmonic interference information between the first resource and the second resource.
Abstract:
An antenna system, including a receiver set, a transmitter set, and an antenna array, where the receiver set includes a plurality of receivers, and the transmitter set includes a plurality of transmitters; the antenna array includes a first antenna unit set and a second antenna unit set; the first antenna unit set includes at least one first target antenna unit, and the second antenna unit set includes at least one second target antenna unit; and any one of the at least one first target antenna unit is connected to any receiver in the receiver set, and any one of the at least one second target antenna unit is connected to any transmitter in the transmitter set.
Abstract:
Embodiments of the present invention provide a multi-sector MIMO active antenna system and a communications device, where the multi-sector MIMO active antenna system includes N columns of dual-polarized antennas, where each column of dual-polarized antennas includes one column of antenna units in a first polarization direction and one column of antenna units in a second polarization direction, antenna array elements in an antenna unit in the first polarization direction are set to have a first antenna downtilt and serve a first sector, and antenna array elements in an antenna unit in the second polarization direction are set to have a second antenna downtilt and serve a second sector.
Abstract:
A method for network device redundancy backup includes performing communication and exchanging a VRRP message directly between VRRP master and backup routers to negotiate a master and backup relationship and sending, by the VRRP master device using an interface connected to an access device, a gratuitous ARP packet to the access device, so as to instruct the access device to direct user traffic to the VRRP master router. According to this method, the VRRP master and backup routers communicate and exchange a VRRP message directly, and the VRRP master router sends a gratuitous ARP packet to an access device through an interface connected to the access device.
Abstract:
This application relates to example service configuration methods and example apparatuses. In one example method, a first optical transport network (OTN) device receives a first message from an optical line terminal (OLT) device, where the first message includes first address information of a service. The first OTN device determines, based on the first message, whether a first path has been established in an OTN, where the first path is used to transmit data of the service, and the first path satisfies the first address information. The first OTN device establishes a path for transmitting data of the service or adjusts a bandwidth of the established first path based on a result of the determining.
Abstract:
A service data transmission method, to simplify a structure of a communication network and facilitate planning of the communication network by service planning personnel. The method includes: A service receiving device actively sends a MAC address of the service receiving device to a plurality of service sending devices that have a connection relationship with the service receiving device, and each service sending device configures local routing information based on the MAC address. The MAC address of the service receiving device does not need to be obtained based on an ARP request, avoiding a limitation on an IP address of a device port caused by the ARP request. An IP address of one device is used to replace IP addresses of a plurality of ports of the device, simplifying a communication network.
Abstract:
This application provides an SRS transmission method, an access network device, and a terminal device. The method includes: sending channel sounding reference signal SRS time domain resource indication information to a terminal device, where the SRS time domain resource indication information indicates an SRS time domain resource, and the SRS time domain resource includes at least one of the first symbol to the eighth symbol in a first slot; and receiving an SRS from the terminal device on the SRS time domain resource. In this application, more symbols can be allocated to transmit an SRS, so that more accurate channel estimation can be performed based on the received SRS.
Abstract:
A signal transmission method includes: processing, by a base station, a first baseband signal, a second baseband signal, a third baseband signal, and a fourth baseband signal by using a VAM matrix, to obtain four processed signals; performing precoding processing on the four processed signals to obtain four coded signals; and sending the four coded signals to a mobile terminal by using four radio frequency ports. The four radio frequency ports are in a one-to-one correspondence with the four coded signals. A first processed signal is the same as a third processed signal, a second processed signal is the same as a fourth processed signal. The first processed signal is obtained by performing superposition on the first baseband signal and the third baseband signal, and the second processed signal is obtained by performing superposition on the second baseband signal and the fourth baseband signal.