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Base station, and method and system for measuring and feeding CSI (channel state information)

A feedback system and measurement configuration technology, applied in the communication field, can solve the problems of subframes that cannot be occupied, large surrounding interference, and busy LBT detection channels.

Active Publication Date: 2015-04-29
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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  • Base station, and method and system for measuring and feeding CSI (channel state information)
  • Base station, and method and system for measuring and feeding CSI (channel state information)
  • Base station, and method and system for measuring and feeding CSI (channel state information)

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Embodiment Construction

[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 invention provides a base station, and a method and a system for measuring and feeding CSI (channel state information) when an LTE (long term evolution) system works on unauthorized frequency bands. The method includes detecting current downlink channel states when downlink service arrives, and transmitting CSI measurement configuration signals and CSI feedback configuration signals, which correspond to the current downlink channel states, to terminals according to the current downlink channel states; or transmitting CSI measurement configuration signals and CSI feedback configuration signals, which correspond to specified downlink channel states, to the terminals when the downlink service arrives, and enabling the terminals to measure and feed the CSI according to the CSI measurement configuration signals and the CSI configuration signals, which correspond to the downlink channel states, after the downlink channel states are acquired. According to the technical scheme, the base station, the method and the system have the advantage that the CSI can be effectively assuredly normally measured and fed after LBT (listen before talk) mechanisms are introduced onto the LTE system on the unauthorized frequency bands.

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...

Claims

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Application Information

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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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