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Determination method of channel quality indication information

A technology of channel quality indication and determination method, which is applied in the field of determination of channel quality indication information in wireless communication systems, and achieves the effect of good compatibility

Active Publication Date: 2012-07-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0051] The technical problem to be solved by the present invention is to provide a method for obtaining feedback channel state information, which is used for channel measurement based on reference signals, and then obtains channel quality indication information. This method considers the influence of various factors on CQI calculation , taking into account the impact of various complex conditions on CQI calculation, thereby solving the problem that the existing system cannot obtain accurate channel quality indication information when using transmission mode 9, and improving the flexibility and performance of the system

Method used

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  • Determination method of channel quality indication information
  • Determination method of channel quality indication information
  • Determination method of channel quality indication information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] Assuming that the base station configures transmission mode 9 for a certain UE, the base station configures 8 CSI-RS ports for the UE, and the CSI-RS port numbers are from 15 to 22.

[0116] A method for determining channel quality indication information includes the following steps:

[0117] The base station eNodeB sends the CSI-RS and CRS to the terminal UE;

[0118] The terminal UE performs channel measurement according to the CSI-RS or CRS;

[0119] The terminal UE determines the CQI reference resource, and the terminal determines the CQI value on the CQI reference resource according to the channel measurement result.

[0120] Further, the method for determining the CQI includes determining the value of the CQI assuming that CSI-RS (channel state information reference symbol) resources are not used CQI reference resources. At this point, there are two possibilities:

[0121] The first possibility is that there are resources used by CSI-RS in the CQI reference res...

Embodiment 2

[0128] Assuming that the base station configures transmission mode 9 for a certain UE, the base station configures 8 CSI-RS ports for the UE, and the CSI-RS port numbers are from 15 to 22.

[0129] A method for determining channel quality indication information includes the following steps:

[0130] The base station eNodeB sends the CSI-RS and CRS to the terminal UE;

[0131] The terminal UE performs channel measurement according to the CSI-RS or CRS;

[0132] The terminal UE determines the CQI reference resource, and the terminal determines the CQI value on the CQI reference resource according to the channel measurement result.

[0133] Further, the CQI determination method includes, for the transmission mode 9, if the eNodeB is configured without PMI / RI and the number of CSI-RS ports of the eNodeB is equal to 8, the eNodeB can set 2 virtual CSI-RS ports, which are assumed to be used for CQI The transmission strategy of the downlink data shared channel of the reference reso...

Embodiment 3

[0139] Assuming that the base station configures transmission mode 9 for a certain UE, the base station configures 8 CSI-RS ports for the UE, and the CSI-RS port numbers are from 15 to 22.

[0140] A method for determining channel quality indication information includes the following steps:

[0141] The base station eNodeB sends the CSI-RS and CRS to the terminal UE;

[0142] The terminal UE performs channel measurement according to the CSI-RS or CRS;

[0143] The terminal UE determines the CQI reference resource, and the terminal determines the CQI value on the CQI reference resource according to the channel measurement result.

[0144] Further, the CQI determination method includes, for transmission mode 9, if the eNodeB is configured with no PMI / RI and the number of CSI-RS ports of the eNodeB is equal to 8, the UE sets 4 virtual CSI-RS ports, and it is assumed that they are used for CQI The transmission strategy of the downlink data shared channel of the reference resourc...

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Abstract

The invention provides an acquiring method of feedback of channel state information, which is used for performing channel measurement based on reference signals so as to further acquire channel quality indication information. The method considers influence of a plurality factors on channel quality indicator (CQI) calculation and influence of a plurality complicated conditions on CQI calculation. Therefore, the method resolves the problem that the existing system fails to acquire accurate channel quality indication information when the existing system uses transmission mode 9, and flexibility and performance of systems is improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for determining channel quality indication information in a wireless communication system. Background technique [0002] In wireless communication technology, when the base station side (e.g., evolved Node B, eNodeB, eNB for short) uses multiple antennas to transmit data, it can adopt spatial multiplexing to increase the data transmission rate, that is, use the same time-frequency The resource transmits different data at different antenna positions, and the receiving end (for example, user equipment UE) also uses multiple antennas to receive data. In the case of a single user, the resources of all antennas are allocated to the same user, and this user exclusively occupies the physical resources allocated to the base station side within a transmission interval. This transmission method is called Single User Multiple Input Multiple Output (SMUMO). -Input Multiple-Out...

Claims

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Application Information

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IPC IPC(8): H04W24/08H04L1/00
CPCH04L5/00H04L1/0026H04W24/00H04W24/10H04L1/00H04W24/08H04L5/0057H04L27/18H04L27/34H04L25/0224H04B7/0417H04B7/0632H04L1/20H04L1/206H04L5/0048
Inventor 李儒岳陈艺戬徐俊郭森宝戴博孙云锋张峻峰
Owner ZTE CORP
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