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Method for transmitting control information in a wireless communication system and apparatus therefor

A technology of a wireless communication system and a transmitting device, which is applied in the field of wireless communication systems and can solve problems such as unfavorable peak-to-average ratios

Active Publication Date: 2015-02-04
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In mobile communication systems, peak-to-average ratio (PAPR) may be more unfavorable when a base station performs transmissions via downlink when user equipment transmits via uplink

Method used

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  • Method for transmitting control information in a wireless communication system and apparatus therefor
  • Method for transmitting control information in a wireless communication system and apparatus therefor
  • Method for transmitting control information in a wireless communication system and apparatus therefor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0109]

[0110] In a single-carrier environment and a multi-carrier environment, since RM coding is used, when RI or ACK / NACK has 3 bits or more, encoded output data has a bit number of 32 bits. However, in a case where the channel state is excellent, and when the number of resource elements is calculated by using Equation 1 and Equation 2, only a very small number of resource elements can be allocated based on the number of bits of information data. In this case, the encoded codewords may be excessively punctured due to RM encoding during the rate matching step performed by using Equation 4, resulting in reduced performance.

[0111] More specifically, in order to perform robust transmission regardless of the channel state, since modulation is performed by using only constellation points of corner points instead of all constellations, RI or ACK / NACK transmission is encoded by RI or ACK / NACK by using the RM coding scheme codeword, so it is known that only 2 bits are mapped ...

no. 2 example

[0142]

[0143] In the case that the information data bits of ACK / NACK and RI are equal to or greater than 12 bits, the PUSCH groups the information data into the same bit number or different bit numbers, and the information data corresponds to at least two or more data sets. And, by using the (32,0) RM coding scheme used in each PUSCH, channel coding can be performed on each divided information data group.

[0144] More specifically, when UCI and data such as RI or ACK / NACK are multiplexed in a multi-carrier environment, the information data bits of UCI are divided into at least two or more groups, and each group can be encoded as a single numbers. In this case, since the (32, 0) RM encoding scheme using Table 1 can be applied, when the number of bits of information data ranges between 3 bits and 11 bits, if the If the number of bits of the information data is between 6 bits and 10 bits, a (32, 0) RM coding scheme can be applied to each group, that is, a double RM coding ...

no. 3 example

[0177]

[0178] When the encoded UCI is mapped to the PUSCH according to the first embodiment and the second embodiment of the present invention, each encoded codeword can be mapped to one resource element or to a specific number of resource elements in virtual carrier order.

[0179] When performing sequential mapping, the encoded codewords are mapped in the direction of increasing index, starting from the least significant (or lowest) index of the virtual subcarrier. For example, when performing dual RM encoding, the first codeword may be mapped to each odd virtual subcarrier starting from the odd virtual subcarrier with the lowest significant index. And, the second codeword may be mapped to each even virtual subcarrier starting from the even virtual subcarrier with the lowest significant index.

[0180] In addition, the mapping methods may also be performed in a time-based order. For example, when the allocated resource elements correspond to the 2nd, 4th, 9th and 11th ...

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Abstract

A method for transmitting information data by using a Reed-Muller coding scheme in a wireless communication system is disclosed. The method includes the steps of configuring a number of resource elements for transmitting the information data; when a bit size of the information data is equal to or larger than a predetermined number, allocating even-numbered data of the information data as first information data, and allocating odd-numbered data of the information data as second information data; applying RM coding on each of the first information data and the second information data; concatenating the coded first information data and the coded second information data, and transmitting the concatenated data by using the predetermined number of resource elements.

Description

technical field [0001] The present invention relates to wireless communication systems. And more particularly, the present invention relates to a method and apparatus for transmitting control information in a wireless communication system. Background technique [0002] In a mobile communication system, a user equipment can receive information from a base station via a downlink, and the user equipment can also transmit information via an uplink. Information received or transmitted by user equipment includes data and various control information. And, various physical channels may exist depending on the type and purpose of information received or transmitted by the user equipment. [0003] figure 1 A physical channel used in a 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) system, which is an example of a mobile communication system and is a general signal transmission method using a physical channel, is illustrated. [0004] When the power of the user ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/16H04L1/18H04B7/06
CPCH04L1/1861H04L5/0053H04L5/001H04L5/0057H04L5/0044H04L1/0067H04L5/0023H04L5/0048H04L1/0073H04L1/0031H04L1/0042H04L5/0055
Inventor 张志雄李文一郑载薰韩承希高贤秀
Owner LG ELECTRONICS INC
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