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A method and device for downlink adaptive modulation and coding

An adaptive modulation and coding technology, applied in the field of communication, can solve problems such as limited terminal capability and limited detection pilot overhead

Active Publication Date: 2016-11-23
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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; these two Both methods are limited by the overhead of probing pilots, and the method applicable to 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 obtain part of the channel through channel reciprocity. channel information

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  • A method and device for downlink adaptive modulation and coding
  • A method and device for downlink adaptive modulation and coding
  • A method and device for downlink adaptive modulation and coding

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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 present invention discloses a downlink adaptive modulation and coding method and device, which are used to more accurately schedule downlink modulation and coding schemes. The embodiment of the present invention includes: obtaining the channel quality indication fed back by each terminal in the local cell; obtaining the historical scheduling information recorded by the adjacent cells of the local cell; according to the historical scheduling information, classifying the channel quality indication according to the different interference modes of the adjacent cells; Calculate the channel quality indicator compensation value between each two different interference modes; obtain the current interference mode of each adjacent cell; Compensation is performed respectively to schedule downlink modulation and coding schemes.

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 outer loop 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, LongTerm 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 suitable fo...

Claims

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Application Information

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Patent Type & Authority Patents(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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