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CSI-RS measurement feedback method and device

A technology for network equipment and terminal equipment, which is applied in the field of CSI-RS measurement feedback and can solve problems such as the performance impact of digital-analog hybrid architecture

Active Publication Date: 2019-03-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the digital-analog hybrid architecture, since the number of digital channels is smaller than the number of antennas, the transmitted pilot is weighted by analog precoding, and the weight of analog precoding is generally unchanged, so it may affect the performance of the digital-analog hybrid architecture. affect

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  • CSI-RS measurement feedback method and device
  • CSI-RS measurement feedback method and device
  • CSI-RS measurement feedback method and device

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Embodiment Construction

[0102] Embodiments of the present application are described below in conjunction with the accompanying drawings.

[0103] The technology described in this application can adopt wireless communication systems of various wireless access technologies, such as code division multiple access (code division multiple access, CDMA), frequency division multiple access (frequency division multiple access, FDMA), time division multiple access (time division multiple access) Division multiple access, TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (single carrier-frequency division multiple access, SC-FDMA) and other access technology systems are also applicable For subsequent evolution systems, such as the fifth generation 5G (also called new radio (new radio, NR)) system and the like.

[0104] The network elements involved in this embodiment of the present application include network devices and terminals. A network device ...

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Abstract

The invention provides a CSI-RS measurement feedback method and device to optimize an analog pre-code and a digital pre-code. The method includes steps: a terminal device receives S CSI-RSs transmitted by a network device, wherein each CSI-RS corresponds to one antenna port number; and the terminal device transmits M antenna port numbers corresponding to M CSI-RSs to the network device and transmits a PMI corresponding to a channel matrix H and a quantification result of the channel matrix H to the network device. Therefore, the terminal device selects and feeds back M antenna port numbers corresponding to the M CSI-RSs to a base station through the S antenna port numbers corresponding to the S SCI-RSs, the network device can be assisted to select a weight of the analog pre-code, the PMI corresponding to the channel matrix H or the quantification result corresponding to the channel matrix H is transmitted to the network device, and optimization of the digital pre-code is realized.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a CSI-RS measurement feedback method and device. Background technique [0002] In order to meet the rapid growth of mobile data, future wireless communication systems need to further increase system capacity and ensure user quality of service (quality of service, QoS) requirements. Many new technologies and concepts, such as massive multiple input multiple output (MIMO), dense network and other technologies have been proposed to meet the demand. At the same time, the communication industry is also turning its attention to high-frequency communication. Since the millimeter wave (millimeter wave) segment has a very large bandwidth, millimeter wave communication has become one of the technologies with development potential in the future 5G wireless communication system. [0003] However, in millimeter-wave communication systems, digital-analog hybrid pr...

Claims

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Application Information

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IPC IPC(8): H04B7/0456
CPCH04B7/0456H04L1/06H04B7/0626H04B7/063H04B7/0691H04B7/0639H04B7/0417H04L5/0048
Inventor 黄逸任海豹李元杰
Owner HUAWEI TECH CO LTD