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Selection method and device of modulation encoding mode

A modulation and coding method and a modulation and coding technology are applied in the field of the selection method and device of the modulation and coding method, which can solve the problems of not taking into account the HARQ combining gain, failing to maximize the utilization of the channel transmission capability, spectrum efficiency, etc., so as to improve the spectrum efficiency. Effect

Active Publication Date: 2010-02-17
HUAWEI TECH CO LTD
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  • Description
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  • Application Information

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Problems solved by technology

[0003] However, the inventor found in the research that the working range of the existing adaptive modulation and coding technology MCS is obtained by simulation at the link level of the physical layer, without considering the influence of the HARQ combining gain. Adaptive modulation and coding technology cannot achieve the purpose of maximizing the use of channel transmission capacity and maximizing spectral efficiency

Method used

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  • Selection method and device of modulation encoding mode
  • Selection method and device of modulation encoding mode
  • Selection method and device of modulation encoding mode

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Embodiment 1

[0015] see figure 1 , which is a flow chart of an embodiment of a method for selecting a modulation and encoding method in the present invention, the method includes the following steps:

[0016] Step 101: Select the target initial block error rate IBLER in Layer 2 according to the hybrid automatic repeat request HARQ combining gain;

[0017] Wherein, according to the HARQ combining gain, selecting the target IBLER at the layer two system level includes:

[0018] On the system platform that supports adaptive modulation and coding AMC technology and supports HARQ function, compare the system throughput when the IBLER value is in the [0, 1] interval, and select the IBLER value that can maximize the system throughput as the target IBLER.

[0019] Step 102: According to the target IBLER, the SINR adjustment amount is obtained by the SINR correction algorithm;

[0020] Among them, according to the target IBLER, the SINR adjustment amount obtained by the SINR correction algorithm ...

Embodiment 2

[0028] The selection method of the modulation and coding method combined with the HARQ combined gain is described in detail below, please refer to figure 2 , which is a flow chart of another embodiment of a method for selecting a modulation and encoding method in the present invention,

[0029] Step 201: According to the HARQ (Hybrid Automatic Request rQuest, Hybrid Automatic Repeat Request) combining gain, select the target IBLER (Initial Block Error Rate, initial block error rate) at layer 2;

[0030] Among them, the HARQ scheme is a combination of ARQ and FEC (Forward Error Correction, Forward Error Correction), that is, an FEC subsystem is included in an ARQ system. When the error correction capability of FEC can correct the errors of these error code groups, It is not necessary to use ARQ, and only when the FEC cannot normally correct the error, the ARQ feedback channel is used to request retransmission of the error code group.

[0031] Step 202: Obtain a convergent SIN...

Embodiment 3

[0048] Corresponding to the above method for selecting a modulation and coding mode, an embodiment of the present invention further provides a device for selecting a modulation and coding mode. see image 3 , which is a structural diagram of an embodiment of a device for selecting a modulation and encoding method in the present invention, the device includes a target IBLER selection unit 301 , an SINR adjustment amount obtaining unit 302 , a corrected SINR obtaining unit 303 and a selection unit 304 . The internal structure and connection relationship of the device will be further introduced below in conjunction with the working principle of the device.

[0049] The target IBLER selection unit 301 is used to select the target initial block error rate IBLER at the layer 2 system level according to the hybrid automatic repeat request HARQ combination gain;

[0050] The SINR adjustment amount obtaining unit 302 is used to obtain the SINR adjustment amount by the SINR correction ...

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Abstract

The embodiment of the invention discloses selection method and device of a modulation encoding mode, wherein the method comprises the following steps: selecting object primary transmission block errorrate (IBLER) from a layer-two system level according to the combined gain of a hybrid automatic retransmission request (HARQ); obtaining an SINR adjusted quantity by a signal-to-interference and noise ratio (SINR) correction algorithm according to the object IBLER; utilizing the SINR adjusted quantity to adjust the original SINR to obtain a modified SINR; and selecting a modulation code combination MCS corresponding to an SINR operation interval into which the modified SINR falls. The spectrum effectiveness for receiving a signal can be improved according to the embodiment of the invention.

Description

technical field [0001] The present 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] AMC (Adaptive Modulation Coding, Adaptive Modulation Coding) technology is a link adaptive technology, which adaptively determines the modulation and coding mode of the current transmitted signal according to the link quality to compensate for the fading effect caused by channel changes on the received signal . Usually, in the AWGN (Additive White Gaussian Noise, additive white Gaussian noise) channel, the channel quality working range corresponding to various MCS (Modulation Coding Set, modulation coding combination) is obtained through physical layer link level simulation, and in the system The channel quality is measured during actual operation, and the MCS that the measured channel quality is within the channel quality working range of the MCS is selected to perform m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W88/08
Inventor 邱赐云彭炳光王胜
Owner HUAWEI TECH CO LTD
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