Method for terminal to select transmission antennae in open loop mode, device and mobile terminal

Abstract

The invention discloses a method for a terminal to select transmission antennae in an open loop mode. The method comprises the following steps of: measuring to obtain a plurality of reference signal receiving power corresponding to a plurality of transmission antennae according to downlink data received by the terminal by using a plurality of transmission antennae in the open loop mode, and downlink antenna configuration of a cell where the terminal is positioned; respectively performing smoothing treatment on the reference signal receiving power so as to obtain a plurality of smoothing results; and determining the transmission antenna with the best quality of the downlink receiving signal according to the smoothing results, and selecting the transmission antenna as the uplink signal transmission antenna. The invention further provides a device for realizing the method, and a mobile terminal. In the invention, the downlink data reference receiving power received by a plurality of transmission antennae is measured and is subject to smoothing treatment, so that the transmission antenna with the best quality of the downlink receiving signal is selected as the uplink signal transmission antenna; the quality of the signal sent by terminal uplink is improved; the coding correct probability is improved; the data retransmission times are reduced; and the throughput efficiency of the system is improved.

Description

technical field [0001] The present invention relates to the technical field of LTE mobile communication systems, in particular to a method, device and mobile terminal for selecting a transmission antenna in an open-loop mode. Background technique [0002] A Multiple-Input Multiple-Output (MIMO) technology is one of the key technologies of a Long Term Evolution (Long Term Evolution, LTE) mobile communication system. Among them, the basic configuration of downlink MIMO adopts a 4×2 or 4×4 antenna configuration, that is, 4 antennas are set in the base station for transmission, and 2 or 4 antennas are set for the terminal to receive (depending on the capability level of the terminal). [0003] In the uplink data transmission, the current protocol stipulates that the terminal only selects one of the antennas for signal transmission. If the high-level configuration antenna is selected as the closed-loop antenna selection mode, the terminal selects according to the antenna indicati...

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Problems solved by technology

[0004] In view of this, the present invention is to provide a method, device and mobile terminal for selecting a transmission antenna in an open-loop mode, so as to solve the problems in the prior art that the probability of correct decoding is low, the number of data retransmissions of the terminal increases, and the LTE system For the problem of reduced throughput efficiency, the technical solution is as follows:

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