摘要:
Embodiments of the present invention provide a radio frequency signal loopback method and an outdoor unit. The outdoor unit includes: a transmitting module, a receiving module, a splitter module, a combining module, a duplexer, and an amplifier. The transmitting module is configured to transmit a signal; the splitter module is configured to split the signal transmitted by the transmitting module into two branches, where one branch of the signal is input into the amplifier, and the other branch of the signal is input into the duplexer; the amplifier is configured to amplify the signal from the splitter module; the duplexer is configured to filter the signal from the splitter module and then output the signal to an antenna, and filter an external signal received by the antenna and then output the external signal to the combining module; the combining module is configured to combine the signal output by the amplifier with the signal output by the duplexer, and then output a combined signal to the receiving module; and the receiving module is configured to receive the combined signal output by the combining module. By using the technical solutions provided in the present invention, loopback of a signal at any frequency in a working frequency band and any service mode of the outdoor unit can be implemented.
摘要:
A method and a device for duplexer fault detection relating to the microwave communications technology are disclosed in the present invention to solve the problem in the prior art that the performance of duplexers cannot be detected online. A method provided by the an embodiment of the present invention includes: receiving the detection voltage of the return wave signals of the duplexer, the return wave signals being part of the reflection signals generated at the input port of the duplexer by microwave signals that are input at the input port of the duplexer; judging whether the detection voltage of the return wave signals exceeds a reference threshold; and determining that the duplexer is faulty if the detection voltage of the return wave signals exceeds the reference threshold. The present invention can realize the detecting of the duplexer performance online.
摘要:
Embodiments of the present invention relate to the database field, and in particular, to a data transmission method and apparatus, so as to reduce overheads for data transmission between nodes in a distributed database and lighten network load. In the embodiments of the present invention, a DN determines one to-be-transmitted column that has a distribution rule, and the distribution rule of parameters in the to-be-transmitted column; the DN determines, according to a data type of the parameters of the to-be-transmitted column and the distribution rule of the parameters in the to-be-transmitted column, a compression algorithm corresponding to the to-be-transmitted column; the DN compresses the to-be-transmitted column by using the compression algorithm; and the DN sends a compressed to-be-transmitted column to a target node. In this way, the overheads for the data transmission between the nodes are reduced, and the network load is lightened.
摘要:
This application relates to the field of communication technologies, and discloses a transmit power control method and apparatus, to resolve an existing problem that transmit power utilization is not high when a network device performs extensive overall transmit power control on a cell. The method includes: A network device determines a transmit power threshold corresponding to a spatial grid; and the network device schedules a resource block RB or a carrier of one or more terminal devices corresponding to the spatial grid, to control a transmit power corresponding to the spatial grid to be less than or equal to the transmit power threshold corresponding to the spatial grid.
摘要:
The present invention discloses a table connection method in a distributed database and a system, and belongs to the field of information technologies. The method includes: storing, in a local memory, data that is sent by a coordinator node and that is in a first target column in a first data table; receiving a table connection request; when first data in the first target column is the same as second data in a second target column, connecting data in a row in which the first data is located to data in a row in which the second data is located; and sending a connection result to the coordinator node. The data node in the present invention stores data in the first target column in the first data table, and directly performs local connection after receiving a table connection request for connecting the first target column in the first data table to the second target column in a second data table. Because data stored on a node does not need to be sent to the coordinator node, not only an amount of transmitted data is reduced, a network response time is shortened, and service performance is improved, but also occupied storage resources of the coordinator node and the data node are reduced and storage space is reduced.
摘要:
This application provides a communication method and an apparatus. The method includes: A network device determines first normalized power at a start moment of an nth periodicity in N periodicities, and determines total normalized power expected to be used by a plurality of cells in the nth periodicity. When the total normalized power is greater than the first normalized power, the network device allocates power to each cell based on preset normalized power of each cell and the first normalized power. The preset normalized power is used for the power allocation. This resolves a problem that a cell power quota at each frequency for a multi-frequency cell is limited, affecting coverage and network performance of each cell.
摘要:
Embodiments of this application relate to the field of communications technologies, and disclose an EMF strength control method and a communication apparatus, so that a size of a grid in an EMF strength monitoring process can be adaptively adjusted, thereby reducing processing pressure of a network device while improving EMF strength control precision. A specific solution is as follows: The network device obtains EMF strength of each grid in a first grid group. The first grid group includes M grids obtained by dividing a signal coverage area of the network device, and M is an integer greater than 1. The network device determines a second grid group based on EMF strength of the M grids. The second grid group includes at least a first grid and a second grid, a coverage area of the first grid is greater than that of the second grid, and EMF strength of the first grid is less than EMF strength of the second grid. The network device monitors EMF strength of a coverage area of the second grid group based on the second grid group, to adjust the EMF strength of the coverage area of the second grid group.