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Downlink adaptive modulation and coding method and device

A technology of adaptive modulation, modulation and coding scheme, applied in the field of communication, can solve the problems of limited probing pilot frequency, limited terminal capability, etc.

Active Publication Date: 2013-12-25
SHANGHAI HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

If the base station can know the scheduling information of several neighboring cells, it can reconstruct the interference matrix for CQI estimation, but this method is only applicable to the TDD system, not to the Frequency Division Duplexing (FDD, Frequency Division Duplexing) system; this Both methods are limited by the overhead of probing pilots, and the method suitable for downlink scheduling is also limited by the capabilities of the terminal. For example, the number of transmission channels of the terminal may be less than the number of reception channels, so the base station can only get partial channel information

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  • Downlink adaptive modulation and coding method and device

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Embodiment Construction

[0057] Embodiments of the present invention provide a downlink adaptive modulation and coding method and device for scheduling a downlink modulation and coding scheme MCS more precisely.

[0058] 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.

[0059] Each will be described in detail below.

[0060] Please refer to figure 1 , figure 1 It is a schematic flowchart of a downlink adaptive modulation and coding method provided by an embodiment of the present invention, wherein the method includes:

[0061] Step 101. Obtai...

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Abstract

The embodiment of the invention discloses a downlink adaptive modulation and coding method and device which are used for more accurately scheduling a downlink modulation and coding scheme. The downlink adaptive modulation and coding method comprises the steps of acquiring a channel quality indicator fed back by each terminal in a cell; acquiring historical scheduling information recorded by an adjacent cell of the cell; according to the historical scheduling information, classifying the channel quality indicators according to different interference modes of the adjacent cell; calculating a compensation value of the channel quality indicator between every two different interference modes and types; acquiring the current interference modes of all the adjacent cells; respectively compensating the channel quality indicators by utilizing the compensation values of the channel quality indicators corresponding to the types of the current interference modes of all the adjacent cells to schedule the downlink modulation and coding scheme.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a downlink adaptive modulation and coding (AMC, Adaptive Modulation and Coding) method and device. Background technique [0002] In general, the base station schedules the downlink modulation and coding scheme (MCS, Modulation Coding Scheme), which is based on the channel quality indicator (CQI, Channel Quality Indicator) fed back by the user terminal (UE, User Equipment) plus the outer ring link adaptation. [0003] Generally, when scheduling the uplink MCS, the base station can estimate the uplink interference from each terminal by using the uplink sounding pilot (such as the sounding reference signal (SRS, Sounding reference signal) in Long Term Evolution (LTE, Long Term Evolution)). If the base station can know the scheduling information of several neighboring cells, it can reconstruct the interference matrix for CQI estimation, but this method is only suitab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04W72/12
Inventor 阙程晟蒋培刚徐波王智鹰
Owner SHANGHAI HUAWEI TECH CO LTD
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