Uplink information feedback and downlink data transmission methods and equipment

A technology of downlink data and transmission method, which is applied in the field of communication, and can solve problems such as insufficient CSI information to track the uplink channel, performance loss, etc.

Active Publication Date: 2017-07-07
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Embodiments of the present invention provide a method and device for uplink information feedback and downlink data transmission, which are used to solve the problem that the CSI information reported by the terminal is not enough to track the change of the uplink channel when the terminal moves at a high speed. The problem of serious performance loss when information is transmitted

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  • Uplink information feedback and downlink data transmission methods and equipment
  • Uplink information feedback and downlink data transmission methods and equipment
  • Uplink information feedback and downlink data transmission methods and equipment

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Embodiment Construction

[0084] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0085] The technology that the embodiment of the present invention provides can be used in various communication systems, such as current 2G, 3G communication system and next generation communication system, such as Global System for Mobile Communications (GSM, Global System for Mobilecommunications), Code Division Multiple Access (CDMA, Code Divis...

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Abstract

The invention discloses uplink information feedback and downlink data transmission methods and equipment, and aims to solve the problem that relatively severe performance loss is caused when data transmission is performed on the basis of channel state information (CSI) reported by a terminal since CSI information reported by the terminal is not enough to track the change condition of a channel when the moving speed of the terminal is very high. The method comprises the following steps that: a base station acquires an lth level pre-coding matrix group corresponding to a pre-coding matrix of the terminal, wherein the pre-coding matrix of the terminal corresponds to L pre-coding matrix groups, each pre-coding matrix group includes at least one pre-coding matrix in a preset codebook, l is equal to 1, ..., L, and L is a positive integer; and the base station transmits downlink data to the terminal according to the pre-coding matrixes included in the acquired lth level pre-coding matrix group. Through the pre-coding matrix groups, a relatively wide beam coverage range is formed for a user; downlink transmission during high-speed movement of the terminal can be ensured; and the downlink transmission reliability is enhanced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for uplink information feedback and downlink data transmission. Background technique [0002] In view of the important role of Multiple Input Multiple Output (MIMO) technology in improving peak rate and system spectrum utilization, wireless access technologies such as Long Term Evolution (LTE) / LTE-A (LTE-Advanced) Standards are built on the basis of MIMO+Orthogonal Frequency Division Multiplexing (OFDM) technology. The performance gain of MIMO technology comes from the spatial freedom obtained by multi-antenna systems. Therefore, one of the most important evolution directions of MIMO technology in the standardization development process is the expansion of dimensions. In LTE Rel-8, up to 4 layers of MIMO transmission can be supported. Rel-9 focuses on enhancing the MU-MIMO technology, and the transmission mode (Transmission Mode, TM)-8 MU-MIMO (Multi-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0639H04B7/0417H04B7/04
Inventor 苏昕宋扬李传军
Owner DATANG MOBILE COMM EQUIP CO LTD
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