csi measurement and feedback method, csi measurement and feedback system and base station

A feedback system and measurement configuration technology, applied in the field of communication, can solve problems such as large surrounding interference, unoccupied subframes, busy LBT detection channels, etc.

Active Publication Date: 2017-01-11
SHENZHEN COOLPAD SOFTWARE TECH
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Problems solved by technology

In the second period, the LBT detection channel is busy, indicating that there is a lot of interference around, so other subframes in this period cannot be occupied

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  • csi measurement and feedback method, csi measurement and feedback system and base station
  • csi measurement and feedback method, csi measurement and feedback system and base station

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[0059] In order to have a clearer understanding of the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0060] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0061] Figure 4 A schematic flowchart of a CSI measurement and feedback method when an LTE system works in an unlicensed frequency band according to an embodiment of the present invention is shown. ...

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Abstract

The present invention provides a CSI measurement and feedback method and system, and a base station when an LTE system works in an unlicensed spectrum. The method comprises: when a downlink service arrives, detecting a current downlink channel state, and sending CSI measurement configuration signaling and CSI feedback configuration signaling that correspond to the current downlink channel state to a terminal according to the current downlink channel state; or when a downlink service arrives, sending CSI measurement configuration signaling and CSI feedback configuration signaling that correspond to a specified downlink channel state to a terminal, so that after the terminal learns the downlink channel state, the terminal performs CSI measurement and a CSI feedback according to the CSI measurement configuration signaling and the CSI feedback configuration signaling that correspond to the downlink channel state. By means of the technical solutions of the present invention, it can be effectively ensured that CSI measurement and a CSI feedback can be normally performed after an LTE system introduces an LBT mechanism to an unlicensed spectrum.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular, to a channel detection method when an LTE system works in an unlicensed frequency band, a channel detection system and a base station when the LTE system works in an unlicensed frequency band. Background technique [0002] With the rapid increase of communication traffic, the authorized spectrum of 3GPP is increasingly insufficient to provide higher network capacity. In order to further improve the utilization of spectrum resources, 3GPP is discussing how to use unlicensed spectrum, such as 2.4GHz and 5GHz frequency bands, with the help of licensed spectrum. These unlicensed spectrums are currently mainly used by Wi-Fi, Bluetooth, radar, medical and other systems. [0003] Usually, access technologies designed for licensed frequency bands, such as LTE (Long Term Evolution, long-term evolution) are not suitable for use in unlicensed frequency bands, because access te...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/309
CPCH04B17/309
Inventor 李明菊朱亚军张云飞
Owner SHENZHEN COOLPAD SOFTWARE TECH
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