A transmission antenna switching method, base station and terminal

Abstract

Embodiments of the present invention relate to a transmitting antenna switching method, a base station, and a terminal. The method includes: when multiple antennas of the terminal receive downlink signals, acquiring a first difference in measured values ​​of received downlink signals between the antennas; if the second A difference satisfying the first preset condition, sending the first report information to the base station; obtaining the first notification message sent by the base station according to the first report information, the first notification message is used to notify the terminal to adjust the current uplink transmission mode of the antenna; determine the transmission antenna, and use the determined transmit antenna for uplink transmission. In order to solve the problem that during the open-loop antenna selection process, when an antenna is blocked by hand, the antenna continues to transmit uplink and cannot be successfully received by the base station, thereby affecting the system performance. At the same time, it can also solve the problem in the closed-loop antenna selection process In this case, the base station needs to instruct the terminal to select the same antenna as the transmitting antenna through downlink control signaling within a period of time, which leads to the problem of increased downlink control signaling overhead.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a transmitting antenna switching method, a base station, and a terminal. Background technique [0002] For open-loop antenna selection, in a TDD (Time Division Duplex) system, the base station can use the uplink and downlink channel reciprocity to perform channel estimation on the uplink reference signal, thereby obtaining downlink channel information. Wherein the uplink reference signal may be SRS (channel sounding reference signal). If the base station needs to obtain complete channel information, the antennas need to transmit reference signals in turn for the base station to perform channel estimation. When the terminal judges that blocking phenomena such as hand-holding have occurred based on the difference in received signal power between the two antennas, the received power of one antenna is too low. If the terminal does not switch the ...

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Problems solved by technology

[0004] Embodiments of the present invention provide a transmitting antenna switching method, a base station, and a terminal to solve the problem that during the open-loop antenna selection process, when a certain antenna is blocked by hand, the antenna continues to transmit uplink and cannot be successfully received by the base station. This further affects the system performance, and can also solve the problem that during the closed-loop antenna selection process, the base station needs to instruct the terminal to select the same antenna as the transmitting antenna through downlink control signaling within a period of time, resulting in an increase in downlink control signaling overhead.

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