Channel quality reporting method and corresponding device

A technology for channel quality reporting and channel information feedback, applied in the field of spatial information feedback, can solve problems such as no feedback scheme is proposed, and achieve the effect of improving flexibility and ensuring accuracy

Inactive Publication Date: 2010-09-08
ZTE CORP
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Problems solved by technology

[0007] At present, the spatial information feedback during CoMP transmission is still in the conceptual discussion stage, and no specific feedback scheme has been proposed.

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  • Channel quality reporting method and corresponding device
  • Channel quality reporting method and corresponding device

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Embodiment Construction

[0046] The present invention provides a channel quality reporting method and corresponding device for coordinated multi-point transmission. Precoding the weight vector to compensate for mutual interference between matching channels requires the terminal to feed back integrated channel information of multiple cells in the coordinated resource and channel information of serving cells in the coordinated resource and non-coordinated resources. Therefore, the base station inserts the common pilot of the serving cell into the entire system bandwidth resources, and inserts the CQI measurement pilot of the multi-cell coordination into the coordination resources. When the two collide, only the CQI pilot of the multi-cell coordination is reserved. In this way, the channel estimation and measurement of the terminal in the serving cell will not be affected, and at the same time, the accuracy of the channel measurement of the terminal will be guaranteed.

[0047] The above-mentioned invent...

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Abstract

The invention relates to a channel quality reporting method and a corresponding device, and is suitable for a wireless communication system adopting multi-point cooperative transmission. The method comprises the following steps that: when receiving a multi-cell cooperative channel quality indicator CQI measurement pilot frequency emitted in cooperative resources and a public pilot frequency of a service cell emitted in bandwidth resources of a whole system by a service cell base station, a terminal in multi-cell cooperation feeds back to the service cell base station the multi-cell comprehensive channel information in the cooperative resources measured according to the CQI measurement pilot frequency and the CQI information of the service cell in non-cooperative resources measured according to the public pilot frequency so as to be used for the service cell base station to allocate cooperative resources and non-cooperative resources in the cooperative transmission for the terminal. The invention can reduce the impact on the terminal channel measurement of the service cell and the cooperative cell, and ensures the accuracy of multi-cell channel quality measurement in the cooperative transmission.

Description

technical field [0001] The present invention relates to a spatial information feedback technology in a wireless communication system, in particular to a channel quality indicator (CQI, Channel Quality Indicator) method and a corresponding device in the wireless communication system. Background technique [0002] In order to provide high throughput and solve the interference problem between cells, the new generation of wireless communication system considers the introduction of cooperative MIMO technology between network levels, such as LTE-A (Long-Term Evolution Advanced) advanced long-term evolution system, IMT-A (International Mobile Telecommunication Advanced) Advanced International Mobile Telecommunications Evolution System, etc. However, in the LTE-A system, the coordinated multi-point (CoMP, Co-Multi Point) transmission technology has been formally studied as an alternative technology. Since the antenna distance between the user at the edge of the cell and the antenna...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04L1/00H04B1/707
Inventor 段亚军毕峰孙云锋张晨晨张峻峰姜静朱常青
Owner ZTE CORP
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