Method and device for allocating power to downlink control channel, and base station

Abstract

The invention discloses a method and a device for allocating power to a downlink control channel, and a base station. By the invention, the power is dynamically allocated to the downlink control channel, the reasonableness of allocating the power to the downlink control channel is improved, the receiving performance of the downlink control channel of each user is improved, and same frequency interference among cells of the downlink control channel is reduced. The method comprises the following steps of: determining the received signal-to-noise ratio of the downlink control channel of the user according to downlink channel information of the user; determining the target signal-to-noise ratio of the downlink control channel of the user; and determining the transmitting power of the downlink control channel of the user according to the received signal-to-noise ratio and the target signal-to-noise ratio. Due to the technical scheme, the reasonableness of allocating the power to the downlink control channel of the user is improved, so that the receiving performance of the downlink control channel of each user is improved, and the same frequency interference among the cells of the downlink control channel is reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and base station for allocating power for a downlink control channel. Background technique [0002] At present, in the LTE (Long Term Evolution, long-term evolution) system, in order to reduce the interference in the cell, the main way is to use OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology to transmit data in the downlink control channel. Although this method reduces intra-cell interference, it increases ICI (Inter-Cell Interference, Inter-Cell Interference) interference, which is particularly significant compared with the traditional 3G system. In order to reduce inter-cell interference, the main method is to use frequency reuse to transmit data between cells, that is, different frequency bands are used for networking between adjacent cells, such as a network with a frequency reuse factor of 3, 4 or 7....

AI Technical Summary

Problems solved by technology

The power allocation of this PDCCH channel only adopts the strategy of power equalization. The basis for selecting the PDCCH format for user DCI information is the user’s channel conditions and the bit length of the user’s DCI information. In addition to the processing flow specified in the LTE standard, each user’s PDCCH performance guarantee only relies on link adaptation at a limited number of aggregation levels (usually 4), which cannot ensure the receiving performance of PDCCH, and there may be serious problems of co-channel interference

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