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Feedback method of channel state information and user device

A channel state information, user equipment technology, applied in the field of communication, can solve the problems of heavy CSI load and occupied resources, etc.

Active Publication Date: 2011-07-06
趣无忧人力资源(上海)有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0012] Compared with the broadband mode and UE selection mode, the high-level configuration mode can provide better cooperation gain, but since the UE needs to feed back the CSI of all cells on each subband to the network side, the load of the UE feedback CSI is relatively large, and it takes up more resources

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  • Feedback method of channel state information and user device

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Embodiment Construction

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0071] In order to solve the problem that the user equipment feeds back the CSI of multiple cells participating in the multi-cell coordinated service mode, which occupies more resources and cannot provide cooperation gain, etc., embodiments of the present invention provide a channel state information feedback method and user equipment.

[0072] Such as figure 1 As shown, the channel state information feedback method provided by the embodiment of the present inventi...

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Abstract

The embodiment of the invention discloses a feedback method of channel state information and a user device, which relates to the communication field and aims at solving the problems that large resources occupied by CSI (channel state information) of all cells participating in a multi-cell collaboration service mode are fed back, and collaboration gain can not be provided and the like. The technical scheme includes: acquiring target sub-bands within the working bandwidth range of a plurality of cells participating in a multi-cell collaboration service mode; according to the target sub-bands, calculating the CSI of the multiple cells participating in the multi-cell collaboration service mode; and transmitting the CSI of the multiple cells participating in the multi-cell collaboration service mode and the positions of the target sub-bands from a network side. The method and the device can be applied to the multi-cell collaboration service mode system.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel state information feedback method and user equipment. Background technique [0002] In a multi-cell coordinated service mode system, each cell provides a service for a user equipment (User Equipment, UE) on the same time-frequency resource through joint scheduling or joint processing. The UE needs to feed back downlink channel state information (Channel State Information, CSI) of each cell to the network side, so that the network side performs time-frequency resource scheduling for the UE according to the CSI of each cell. [0003] The prior art provides three methods for the UE to feed back CSI: [0004] 1. Broadband feedback mode [0005] The UE calculates the CSI of each cell on the full bandwidth respectively, and feeds back the calculated CSI of each cell to the network side. [0006] In the actual communication process, the signal quality of different frequenc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04W28/16
Inventor 张永平闫志宇任晓涛孙静原
Owner 趣无忧人力资源(上海)有限公司
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