Channel state information feedback method, downlink reference signal transmitting method and device

A technology of channel state information and reference signal, applied in the field of communication

Active Publication Date: 2016-08-17
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Channel state information feedback method, downlink reference signal transmitting method and device
  • Channel state information feedback method, downlink reference signal transmitting method and device
  • Channel state information feedback method, downlink reference signal transmitting 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

The invention discloses a channel state information feedback method, a downlink reference signal transmitting method and a downlink reference signal transmitting device. According to the technical schemes provided by the embodiments of the invention, a base station groups antenna ports in a horizontal dimension and/or a vertical dimension respectively, sends horizontal-dimension downlink reference signals at antenna port groups in the horizontal dimension, and/or transmits of vertical-dimension downlink reference signals at antenna port groups in the vertical dimension; and user equipment obtains a horizontal-dimension measurement channel matrix and/or a vertical-dimension measurement channel matrix according to the downlink reference signals which are corresponding to the antenna port groups and received at the horizontal dimension and the vertical dimension, and the feedback of channel state information can be carried out; and therefore, problems in channel state information feedback under a large-scale antenna array condition can be solved.

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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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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