Method, network device, terminal device and system for multi-antenna data transmission

Abstract

Embodiments of the present invention relate to a multi-antenna data transmission method, a network device, a terminal device and a system. The method includes that the network device sends downlink control signaling to the terminal device, the downlink control signaling instructs the terminal device to feed back statistical channel parameter information, the statistical channel parameter information is determined by the terminal device according to statistical channel information, and the statistical channel information is determined by The terminal device calculates and obtains the instantaneous channel after multiple measurements; the network device receives the statistical channel parameter information sent by the terminal device and is determined according to the downlink control signaling; the network device processes the downlink data according to the statistical channel parameter information , and send the processed downlink data to the terminal device. The multi-antenna data transmission method, network device, terminal device and system of the embodiments of the present invention can effectively increase the throughput of the system.

Description

technical field [0001] The present invention relates to the communication field, in particular to a multi-antenna data transmission method, network equipment, terminal equipment and system. Background technique [0002] In 3GPP long-term evolution / 3GPP follow-up long-term evolution (Long term evolution / Longtermevolution-advanced, LTE / LTE-A), as the number of antennas at the data transmitting end continues to increase rapidly, the user equipment (User equipment, UE) that needs to serve The number, that is, the number of UEs to be scheduled is also increasing rapidly. The increase in the number of antennas can provide a higher degree of spatial freedom, which multiplexes multiple data streams for the downlink (can be (Single-user Multiple-input and multiple-output, SU-MIMO) or (Multi-user Multiple-input and multiple- output, MU-MIMO)) create favorable conditions. [0003] In order to obtain the high spatial freedom provided by large-scale antennas, the relevant channel infor...

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Problems solved by technology

[0005] Since the amount of downlink pilot overhead is proportional to the number of antennas at the data transmitter, the amount of uplink pilot overhead is proportional to the number of UEs to be served, and the amount of uplink CSI feedback is also proportional to the number of antennas at the data transmitter. When the number of antennas is not many (such as 4 / 8 antennas of LTE / LTE-A), the pilot overhead and the amount of uplink CSI feedback can be controlled, but when the number of antennas is large (the number of UEs available for scheduling will also increase ), the uplink and downlink pilot overhead and uplink CSI feedback will occupy a large amount of time-frequency resources, causing the time-frequency resources available for data transmission to be compressed, and the system throughput will be greatly affected

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