Feedback and reception method and device for channel state information

A technology for channel state information and terminal equipment, which is applied in the field of communication and can solve the problem that there is no definition of the correspondence between precoding matrix indication information and codebook index, etc.

Active Publication Date: 2011-12-21
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] Embodiments of the present invention provide a channel state information feedback and receiving method and device, which solves the problem in the pr...

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  • Feedback and reception method and device for channel state information
  • Feedback and reception method and device for channel state information
  • Feedback and reception method and device for channel state information

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Embodiment Construction

[0031] The inventor noticed in the process of implementing the present invention that in an actual system, a transmission mode may include multiple transmission schemes, and mode switching between various transmission schemes is supported. In order to better ensure transmission performance and system stability, a transmission mode that supports CoMP transmission often needs to support switching to single-point transmission.

[0032] By configuring different CSI-RS (Channel State Information Reference Signal, channel state information reference signal), the system enables UE (User Equipment, terminal equipment, that is, terminal equipment) to measure the downlink channel of each "transmission point". It should be noted that the "transmission point" may not be a physical transmission point, but may be a virtual transmission point, and each virtual transmission point corresponds to a CSI-RS resource, and is composed of one or more physical transmission points.

[0033] After the ...

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Abstract

The embodiment of the invention discloses a channel state information feedback method, channel state information feedback equipment, a channel state information receiving method and channel state information receiving equipment. By the technical scheme provided by the embodiment of the invention, user equipment feeds channel state information back to network side equipment in a periodic reporting mode supporting coordinated multiple point (CoMP) transmission, wherein a corresponding periodic reporting mode comprises a reporting type used for feeding the rank indication (RI) of a main transmission point back, a reporting type used for feeding a channel quality indicator (CQI) and a precoding matrix indicator (PMI) of the main transmission point back, and/or a reporting type used for feeding the CQI and PMI of a non-main transmission point back, and/or a reporting type used for feeding the CQI and PMI, based on the hypothesis of RI=1, of the main transmission point back. Therefore, various CoMP transmission schemes can be supported.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for feeding back and receiving channel state information. Background technique [0002] The LTE-A (Long Term Evolution-Advanced) system adopts co-frequency networking, which not only greatly improves the spectrum utilization rate, but also causes serious signal fading of cell edge users, and is subject to high interference from other cells. Therefore, if the signal fading and interference problems are not dealt with, it will seriously affect the experience of cell edge users. [0003] CoMP (Coordinated Multiple Point, coordinated multi-point) technology can improve signal quality and reduce inter-cell interference by introducing information interaction and joint transmission between multiple cells, thereby greatly improving the data transmission performance of cell edge users. Among them, the coordinated multi-point transmission scheme can be divided i...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/06
Inventor 张然然高秋彬彭莹陈文洪
Owner DATANG MOBILE COMM EQUIP CO LTD
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