Data transmission method, system and device

Abstract

The invention discloses a data transmission method and a data transmission system, which are used to ensure that a terminal can correctly decode data streams. The method comprises that: a base stationsets downlink control information of each data stream to be transmitted to the terminal at a corresponding position in the same downlink control signaling according to a position of the downlink control information of each data stream determined in the same downlink control signaling, and then sends the downlink control information to the terminal; the base station inserts a dedicated pilot of each data stream determined into a corresponding data stream, and then sends the data stream to the terminal; the terminal determines the downlink control information of each data stream in the downlinkcontrol signaling according to the position of the downlink control information of each data stream determined in the same downlink control signaling; and the terminal receives a plurality of data streams sent by the base station, identifies each data stream by the dedicated pilot of each data stream determined, decodes the corresponding data stream according to the downlink control information of each data stream, and acquires service data borne on each data stream.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method, system and device. Background technique [0002] In future communication systems, such as High Speed ​​Packet Access Plus (HSPA+, High Speed ​​Packet Access Plus), Long Term Evolution (LTE, Long Term Evolution) and other systems, multiple input multiple output (MIMO, Multiple Input Multiple Output) technology is introduced In order to further improve the data transmission rate and transmission quality of the system. [0003] The MIMO technology adopts dual-stream transmission, that is, the base station uses two data streams to send service data to the terminal at the same time. Then, after receiving the two data streams, the terminal needs to perform an operation of distinguishing the two streams, that is, to distinguish each data stream. [0004] The commonly used methods for distinguishing dual streams in existing Frequency Division ...

AI Technical Summary

Problems solved by technology

In the Time Division Duplexing (TDD, Time Division Duplexing) system, a dedicated pilot is used to send data streams, and the terminal uses a dedicated pilot to perform channel estimation on the received data stream. However, the TDD system is currently in the process of standardization, and there is no Clarify how the terminal and the base station correctly identify the control information of each data stream sent to each other

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