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Precoding feedback method, system, user equipment and base station

A user equipment and precoding technology, which is applied in the transmission system, baseband system components, radio transmission system, etc., can solve the problem of high feedback overhead and achieve the effect of reducing feedback overhead

Inactive Publication Date: 2010-07-21
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

[0004] The present invention provides a precoding feedback method and system, user equipment and base station to solve the problem of large feedback overhead

Method used

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  • Precoding feedback method, system, user equipment and base station
  • Precoding feedback method, system, user equipment and base station
  • Precoding feedback method, system, user equipment and base station

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Embodiment Construction

[0031] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0032] figure 1 It is a schematic flow chart of the method of the first embodiment of the present invention, figure 2 It is a schematic structural diagram corresponding to the first embodiment of the present invention. see figure 1 , the embodiment of the present invention includes:

[0033] Step 11: The user equipment receives a random beam information flow, and determines an optimal beam set according to the signal-to-interference-noise ratio of the random beam information flow.

[0034] Step 12: the user equipment acquires a feedback threshold.

[0035] Steps 11 and 12 have no timing restriction.

[0036] Step 13: The user equipment feeds back information about at least one beam in the optimal beam set with a signal-to-interference-noise ratio higher than the feedback threshold value to the base station.

[0...

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Abstract

The invention discloses a precoding feedback method, a system, user equipment and a base station. The method comprises the following steps of: receiving a random wave beam information flow and determining an optimal wave beam assembly according to the signal-to-interference and noise ratio of the random wave beam information flow; obtaining a feedback threshold value; and feeding back the information of at least one wave beam the signal-to-interference and noise ratio of which is higher than the feedback threshold value in the optimal wave beam assembly. By the embodiment of the invention, the feedback quantity during precoding can be lowered.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a precoding feedback method and system, user equipment and base station. Background technique [0002] The multiple input multiple output (Multiple Input Multiple Output, MIMO) technology can greatly increase the transmission rate of the wireless communication system without increasing the bandwidth, and satisfies the requirements of high-rate data transmission services. In the MIMO system, the reliability and transmission rate of the transmission link can be improved by using the precoding technology to transmit multiple data streams at the same time. However, the precoding technology is performed based on the assumption that the transmitting end knows all or part of the channel state information. Therefore, in many cases, the receiving end needs to feed back the channel state information to the transmitting end. In a multi-user environment, to reduce the amount of fee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04L1/06H04B7/08
CPCH04B7/0417H04B7/0634
Inventor 王晓东李斌沈晖罗毅刘锋
Owner HUAWEI TECH CO LTD
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