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Method and device for measuring CSI (Channel State Information) as well as reference signal sending method and device

A channel state information and reference signal technology, applied in the field of communication, can solve the problems of a huge number of resource units and a small number of effective resource units, etc.

Active Publication Date: 2014-04-23
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the 4-port CSI-RS resource design in the current LTE system, in each physical resource block (PRB, Physical Resource Block), the CSI-RS of each port occupies 1 or 2 resource units. When the antenna scale increases to When dozens or even hundreds, the number of resource units occupied by CSI-RS in each PRB will be particularly large, resulting in too few effective resource units that can actually be used for data transmission

Method used

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  • Method and device for measuring CSI (Channel State Information) as well as reference signal sending method and device
  • Method and device for measuring CSI (Channel State Information) as well as reference signal sending method and device
  • Method and device for measuring CSI (Channel State Information) as well as reference signal sending method and device

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Embodiment 1

[0148] An embodiment of the present invention provides a method for measuring channel state information. The method of this embodiment is a method performed by a receiving device such as a user equipment or a base station for receiving signals. The flow chart is as follows figure 1 As shown, the method includes:

[0149] Step A1, receiving the reference signal configuration information sent by the sending device, and receiving the configured reference signal of N reference signal ports; where the sending device can be a device for sending signals such as user equipment or a base station, and the sending device is related to the implementation of this implementation Corresponding to the receiving device of the example method, for example, when the sending device is a user equipment, the receiving device is a base station, and when the sending device is a base station, the receiving device is a user equipment.

[0150] Step A2, performing channel state information CSI measuremen...

Embodiment 2

[0159] An embodiment of the present invention provides a method for sending a reference signal. The method in this embodiment is performed by a sending device such as a user equipment or a base station for sending signals. The method in this embodiment is the method in the first embodiment above. The method performed by the sending device corresponding to the receiving device, wherein the receiving device may be a device for receiving signals such as user equipment or a base station, and the receiving device corresponds to the sending device performing the method in this embodiment, for example, when sending If the device is user equipment, then the receiving device is a base station; when the sending device is a base station, then the receiving device is user equipment.

[0160] The flow chart of the method in this embodiment is as follows figure 2 As shown, the method includes:

[0161] Step B1, configuring N reference signal ports, N>=6, the N reference signal ports are c...

Embodiment 3

[0167] An embodiment of the present invention provides a method for measuring channel state information.

[0168] Before describing the solution provided by the embodiment of the present invention, it should be understood that the precoding matrix indicator (PMI) of all antenna ports is composed of the precoding matrix indicator PMI of multiple antenna port groups m , (where, PMI m Represents the precoding matrix indicator of the m-th group of antenna ports) jointly obtained, therefore, the antenna ports of the channel state information reference signal (CSI-RS, Channel State Information-Reference Signal) dedicated to channel state information measurement can be divided into Multiple antenna port groups of different levels are measured to obtain the precoding matrix indicators of each antenna port group of different levels, so as to obtain the total precoding matrix indicators of all antenna ports. See the formula below:

[0169] PMI = ...

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Abstract

The invention provides a method and a device for measuring CSI (Channel State Information) as well as a reference signal sending method and a reference signal sending device. The method comprises the following steps: receiving reference signal allocation information sent by sending equipment and allocated reference signals of N reference signal ports; measuring CSI on the basis of the allocated reference signals of the N reference signal ports, wherein N is greater than or equal to 6, and the N reference signal ports consist of M groups of reference signal ports, wherein M is greater than or equal to 1. The step of measuring the CSI on the basis of the reference signals of the N reference signal ports comprises the following steps: measuring the CSI of the reference signals of each group of ports among the M groups of reference signal ports so as to obtain M first precoding matrixes, namely Wi, wherein i is equal to 1,2,...,M; obtaining a second precoding matrix W: W=W1*W2*...*WM according to the first precoding matrixes; obtaining a CQI (Channel Quality Indicator) according to the second precoding matrix. According to the scheme, measurement on the CSI is realized.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for channel state information measurement and reference signal transmission. Background technique [0002] In a wireless communication system, the transmitting end and the receiving end use multiple antennas in a spatial multiplexing manner to obtain a higher rate. Compared with the general spatial multiplexing method, an enhanced technology is: the receiving end feeds back the channel state information to the sending end, and the sending end uses some precoding techniques for the transmitted signal according to the obtained channel state information, which greatly improves the transmission performance. . [0003] The sending end sends a predefined pilot signal, where the number of ports of the pilot signal is equal to the number of ports for data transmission, and the receiving end performs channel state information (Channel State Information,...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L1/20
CPCH04L5/0048H04B7/0456H04L5/0023H04L25/0204H04L1/0026H04B7/0626
Inventor 刘建琴
Owner SHANGHAI HUAWEI TECH CO LTD
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