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Channel information feedback method and equipment thereof

A technology of channel information feedback and channel information, which is applied in the field of channel information feedback method and its equipment, to achieve the effect of improving feedback accuracy and reducing feedback overhead

Active Publication Date: 2012-05-09
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] The technical problem to be solved by the present invention is to propose a downlink signaling indication method to solve the contradiction between the system performance gain and the uplink feedback overhead that may exist in the downlink feedback process of the LTE-A system

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  • Channel information feedback method and equipment thereof
  • Channel information feedback method and equipment thereof
  • Channel information feedback method and equipment thereof

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Embodiment Construction

[0047] In order to clearly describe the implementation steps of the present invention in detail, some specific embodiments of the present invention are given below, which are applicable to wireless communication systems supporting MU-MIMO, especially LTE-A cellular mobile communication systems. It should be noted that the present invention is not limited to these applications, but is applicable to more other related wireless communication systems.

[0048] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and unnecessary details and functions for the present invention will be omitted during the description to avoid confusing the understanding of the present invention.

[0049] Figure 4 A schematic diagram showing the basic architecture of an MU-MIMO system in which the present invention can be applied. Assume that the system includes a base station 10 and user equipments 20, 30 and 40 located wit...

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Abstract

The invention discloses a channel information feedback method comprising the following steps: receiving a channel information feedback indication signal from a base station and indicating user equipment to feed back one or a plurality of channel information sets in N channel information sets to the base station by the channel information feedback indication signal, wherein N is equal to the rank of a channel matrix, and each channel information set comprises a plurality of channel information relevant to the number of various data flow layers which can be used at the position of the user equipment; and feeding back one or a plurality of channel information sets in the N channel information sets to the base station based on the channel information feedback indication signal. According to the method disclosed by the invention, the feedback expense relevant to the transmission of the higher rank of the channel matrix can be lowered, or the feedback accuracy is enhanced by utilizing a feedback channel of an uplink link more completely.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and more specifically, relate to a channel information feedback method and equipment thereof. Background technique [0002] Multi-User Multiple-Input Multiple-Output (MU-MIMO) is an important technical feature of the LTE Advanced (LTE-A) R10 release. In principle, the more channel information such as RI / PMI / CQI obtained by the base station side, the better the overall performance of MU-MIMO. However, the feedback overhead does not allow each user equipment (UE) in MU-MIMO to be able to feed back that much channel information. [0003] In LTE-A, the content of the current downlink feedback mainly includes channel quality index (CQI: Channel Quality Index), channel precoding matrix index (PMI: Precoding Matrix Index) and channel rank index (RI: Rank Index), and These three parameters vary with the number of data stream layers available at the user equipment. For ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
Inventor 杨红卫吕荻刘皓
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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