A channel state information feedback method, downlink reference signal method and device

A technology of channel state information and reference signals, applied in the direction of using the return channel for error prevention/detection, digital transmission system, and error prevention

Active Publication Date: 2019-07-19
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to provide a channel state information feedback method, downlink reference signal transmission method and device to solve the problem of how to perform channel state information when the horizontal dimension and / or vertical dimension of the antenna array exceeds the number of downlink reference signal ports supported by the system. Feedback question

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  • A channel state information feedback method, downlink reference signal method and device
  • A channel state information feedback method, downlink reference signal method and device
  • A channel state information feedback method, downlink reference signal method and device

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Embodiment Construction

[0110] According to the technical solution provided by the embodiment of the present invention, the base station can configure downlink reference signals for UEs in a large-scale antenna system based on the CSI-RS resources whose number of ports does not exceed the number of ports supported by the existing system. The UE determines and feeds back the channel state information according to the channel estimation from the base station antenna to the UE.

[0111] In the following, an implementation manner of transmitting a downlink reference signal at the base station side and an implementation manner of channel state information feedback at the UE side provided by the embodiments of the present invention will be described respectively with reference to the accompanying drawings.

[0112] The implementation method of sending the downlink reference signal on the base station side is as follows: figure 1 As shown, it specifically includes the following operations:

[0113] Step 10...

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Abstract

Disclosed are a channel state information feedback method, and a downlink reference signal sending method and device. In the technical solution provided in the embodiments of this disclosure, a base station respectively groups antenna ports in the horizontal dimension and / or the vertical dimension, respectively sends horizontal-dimension downlink reference signals on each group of antenna ports in the horizontal dimension and / or sends vertical-dimension downlink reference signals on each group of antenna ports in the vertical dimension. A user equipment obtains a measurement channel matrix in the horizontal dimension and / or the vertical dimension according to the received downlink reference signals corresponding to various groups of antenna ports in the horizontal dimension and / or the vertical dimension, and then feeds back the channel state information.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a channel state information feedback method, a downlink reference signal sending method and a device. Background technique [0002] In Long Term Evolution (Long Term Evolution, LTE) version (Rel)-8, up to 4 layers of Multiple Input Multiple Output (Multi Input Multi Output, MIMO) transmission can be supported. Rel-9 focuses on enhancing the multi-user MIMO (Multi-User MIMO, MU-MIMO) technology, and the transmission mode (Transmission Mode, TM)-8 MU-MIMO (Multi-User MIMO) transmission can support up to 4 Downstream data layer. Rel-10 further improves the channel quality by introducing 8-port Channel State Information-Reference Signals (CSI-RS), user-specific reference signal (UE-specific Reference Signal, URS) and multi-granularity codebook. The spatial resolution of state information measurement, and further expand the transmission capability of Single-User MIMO ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04L1/00
CPCH04L1/16
Inventor 李传军苏昕
Owner DATANG MOBILE COMM EQUIP CO LTD
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