Method and device for selecting modulation and coding scheme

A technology of modulation and coding methods and coding methods, which is applied in the field of modulation and coding method selection methods and devices, can solve problems such as unsuitable channel conditions, and achieve the effect of overcoming the influence

Active Publication Date: 2012-02-08
SANECHIPS TECH CO LTD
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  • Abstract
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Problems solved by technology

Therefore, under the current technical conditions, the MCS fed back by the receiver is not suitable for the channel conditions when the transmitter transmits

Method used

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  • Method and device for selecting modulation and coding scheme
  • Method and device for selecting modulation and coding scheme
  • Method and device for selecting modulation and coding scheme

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Embodiment Construction

[0050] In the modulation and coding method selection method provided by the embodiment of the present invention, in order to enable the base station to use the MCS suitable for the channel conditions during transmission to transmit data, when the receiver selects the MCS, a certain estimation is performed to offset the change of the channel condition to the dynamic MCS selection mechanism the adverse effects brought about. Specifically, the receiver can use the interference and noise power of the measurement subframe to dynamically adjust the range of the average carrier to interference and noise ratio (CINR: Carrier to Interference plus Noise Ratio) in the reference MCS parameters, and then use the measurement subframe to schedule The average interference and noise power in the period is calculated to obtain the average CINR in the predetermined period, and the corresponding MCS is selected by comparing the adjusted average CINR range. In this way, the influence of channel co...

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Abstract

The invention provides a method and device for selecting a modulation and coding scheme. The method comprises the steps of: regulating ranges of a mean carrier and an interference-to-noise ratio in parameters of a reference modulation and coding scheme by a receiver according to interferences and noise power of a measured subframe; calculating to obtain a mean carrier and an interference-to-noise ratio in a predetermined period by the receiver according to the mean interference and the noise power in a predetermined period of the measured subframe; and determining information on the modulation and coding scheme by the receiver by comparing the regulated range of the mean carrier and the interference-to-noise ratio based on the mean carrier and the interference-to-noise ratio, which are obtained through calculation, in the predetermined period. Accordingly, the influence brought by channel condition changes to selection of the dynamic modulation and coding scheme is eliminated.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for selecting a modulation and coding mode. Background technique [0002] A typical wireless communication channel changes randomly, and has the characteristics of frequency selectivity and time variation. In the design of a wireless communication system, this random variation of the wireless channel needs to be taken into account. And a more superior design can use this randomness to improve the performance and capacity of the system. One of the important ideas is to change the transmission rate by dynamically adjusting the Modulation and Coding Scheme (MCS: Modulation and Coding Scheme) according to the instant quality of the channel. And the dynamic selection technology of MCS is the key technology of 3G, 4G and even future broadband wireless communication. This technology has been widely used in 3G and 4G broadband wireless communication fields s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B17/00H04W28/04
CPCH04L1/0009H04B1/1027H04L1/0003H04L1/0019H04L1/0025H04L1/20
Inventor 任天民
Owner SANECHIPS TECH CO LTD
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