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Transmission method, reception method and device of channel state information

A technology of channel state information and sending method, which is applied in the field of receiving method and device, and sending method of channel state information, which can solve the problems of wasting system resources and high overhead, and achieve the effect of reducing overhead

Active Publication Date: 2021-04-09
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 prior art, when the terminal equipment feeds back the CSI of the common channel and the CSI of the traffic channel, the overhead of feeding back the CSI is relatively large, which wastes system resources

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  • Transmission method, reception method and device of channel state information
  • Transmission method, reception method and device of channel state information
  • Transmission method, reception method and device of channel state information

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Embodiment Construction

[0098] The network architecture and business scenarios described in the embodiments of the present invention are to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute limitations on the technical solutions provided by the embodiments of the present invention. The evolution of the architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

[0099] It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex ( time division duplex, TDD) communication system, etc.

[0100] It should also be understood that in this embodiment of the present inventio...

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Abstract

The present application relates to the field of mobile communication, in particular to the multi-antenna technology in the wireless communication system. This application provides a method, device and system for sending channel state information CSI. In this solution, the terminal equipment feeds back the first rank used for the common channel, the first precoding matrix indication, and the second rank used for the traffic channel, and the second precoding matrix indication to the base station. The first precoding matrix indication is used to indicate the first precoding matrix in the first precoding matrix set. The second coding matrix indication is used to indicate the second precoding matrix in the second precoding matrix set. The first set of precoding matrices is different from the second set of precoding matrices. Since different sets of precoding matrices are used for common channels and traffic channels to obtain channel state information. Feedback bits are saved when system requirements are met.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a sending method, a receiving method and a device for channel state information. Background technique [0002] A long term evolution (long term evolution, LTE) system widely adopts a multiple input and multiple output (multiple input and multiple output, MIMO) technology, that is, a multi-antenna technology. Affected by factors such as the atmosphere and vegetation, the path loss of wireless propagation is very large in some cases. The precoding technology in multi-antenna can compensate the loss to a certain extent. [0003] In order to compensate the path loss of the public channel and the traffic channel, the terminal device may feed back channel state information (channel state information, CSI) of the public channel and CSI of the traffic channel to the base station. The base station uses the fed back CSI to precode the sent data. However, in the pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0632H04B7/04H04B7/0478H04B7/063H04B7/0639H04B7/065H04B7/0486H04B7/0626
Inventor 刘建琴
Owner HUAWEI TECH CO LTD