KR20150027020A - Apparatus and method for transmission of physical uplink control signaling in uplink wireless communication systems with multi-carrier transmission - Google Patents

Abstract

The present invention provides a method for efficiently transmitting uplink control information (UCI) in a wireless communication system which uses a multicarrier transmission technique. The entire system bandwidth in a multicarrier transmission system is configured with aggregation of a plurality of component carriers which have different center frequencies. In order to support a terminal which uses an existing single carrier in such an environment, each of the carriers maintains a single carrier channel structure, and data is transmitted by receiving resources by a plurality of physical uplink shared channels (PUSCH). In this case, the present invention provides a method for determining the number of resources necessary for UCI transmission using a part of PUSCH resources that are allocated to the carriers when simultaneously transmitting UCI and data. The method of the present invention comprises: a step that a transmitter simultaneously transmits the UCLI and data in one subframe by dividing UCI, which has to be transmitted, into pieces and transmitting the plurality of pieces using a plurality of PUSCHs; and a step that a receiver extracts the UCI from the PUSCHs and processes. If the method proposed in the present invention is used, the degradation of data performance can be minimized while improving the quality of UCI.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme, and an apparatus and method for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme.

The present invention relates to a method and apparatus for transmitting uplink control information simultaneously with data in a system using a multi-carrier transmission scheme.

2. Description of the Related Art Orthogonal Frequency Division Multiplexing (OFDM) technology has been widely applied as a technology of broadcasting and mobile communication systems. OFDM technology has the advantage of eliminating interference between multipath signal components existing in a wireless communication channel and ensuring orthogonality among multiple access users and enabling efficient use of frequency resources. Therefore, it is a useful technology for high-speed data transmission and broadband systems as compared to direct sequence CDMA (DS-CDMA) technology. However, OFDMA technology can reduce coverage by reducing the available power by increasing the Peak to Average Power Ratio (PAPR). Therefore, in the LTE (Long Term Evolution) system of 3GPP, OFDM technology is used in the downlink (hereinafter referred to as downlink) and single carrier frequency division multiple access (SC-FDMA) Access) -based technology to increase coverage and thereby reduce terminal power consumption. Both OFDM technology and SC-FDMA scheme have a common point in that frequency resources are allocated as scheduling resources because they are multiplexed between terminals or channels in the frequency domain.

A method of transmitting UCI in the uplink of the LTE system will now be described with reference to FIG.

The following describes the control channel transmission method. The UCI to be transmitted by the UE mainly refers to ACK / NACK, CQI, and Rank Indicator (RI) information necessary for downlink packet data transmission, and generally refers to a Physical Uplink Control Channel (PUCCH) Lt; / RTI > The PUCCH is generally transmitted using both end frequency resources of the system operating frequency band, such as 101 and 102. However, the method of transmitting control information through the allocated frequency resource can not be used when the UE transmits packet data. If a packet data channel (called a PUSCH) and a PUCCH are simultaneously transmitted in the same transmission interval, the single carrier characteristic is not satisfied and the PAPR of the UE is increased. Therefore, in the current LTE system, a UE transmits a control channel using a frequency resource of a data channel in a transmission period in which packet data is transmitted, as shown in FIG. 1 (b). When UCI is transmitted using frequency resources of PUSCH, a method of multiplexing according to the characteristics of each control information is changed. In other words, the CQI punctures a portion of the data bits, such as 106, located behind 107, such as 106, after inserting data bits after rate matching and mapping to physical bits, and places 106 on both sides of the reference symbol . In case of RI, it is placed on both sides of the reference symbol like ACK / NACK, but inserted between data bits without puncturing the data bit. However, since some of the resources to be used for data transmission are used irrespective of the transmission mode, data transmission reduces data as much as the resources used in UCI.

A description will now be made of a method for determining the amount of resources required for UCI transmission when data and UCI are simultaneously transmitted using PUSCH resources as shown in FIG. 1 (b). Here, the resource means the number of symbols or the number of bits allocated to the PUSCH.

When transmitting using the PUCCH, the number of bits to be transmitted to the actual PUCCH by channel coding the information bits is fixed for each UCI type. And the reception quality can be maintained at a desired target level while increasing or decreasing the transmission power. However, when the UCI is transmitted with data in the PUSCH area, the transmission power should be set to be the same as the data. In this case, if the data has a high spectral efficiency or a high MCS, the received SNR per symbol is high and the SNR is low when using low frequency efficiency or low MCS. In this case, in order to maintain the reception quality of the UCI, it is necessary to change the number of transmission symbols of the UCI considering data. To do this, LTE varies the number of symbols required for UCI transmission according to the frequency efficiency of data transmitted on the PUSCH. The following explains using the equation. When the number of transmittable symbols is Q ', the Q' can be obtained by using an equation. In case of an ACK / NACK or a rank indicator, Equation (1) is obtained.

[Equation 1]

는 할당된 PUSCH전송을 위해서 할당된 서브캐리어의 수,

는 PUSCH전송을 위해서 사용되는 SC-FDMA의 심볼수 그리고, Kr은 채널 코딩전의 데이터 bit의 수가 된다. 상기 파라메터는 모두 초기 전송시 수신한 PDCCH로부터 구해진다.

는 데이터와 UCI간의 목표 SNR 차이를 고려하기 위한 오프셋값을 설정하기 위한 파라메터가 된다. Where O is the number of information bits in an ACK / NACK or Rank Indicator (hereinafter referred to as RI)

The number of subcarriers allocated for the assigned PUSCH transmission,

Is the number of SC-FDMA symbols used for PUSCH transmission, and Kr is the number of data bits before channel coding. All of the parameters are obtained from the PDCCH received upon initial transmission.

Is a parameter for setting an offset value for considering a difference in target SNR between data and UCI.

If the number of symbols is obtained, the number of bits for which each UCI is to be channel-coded can be calculated by Equation (2) below considering the modulation scheme.

&Quot; (2) "

는 변조 방식에 따른 값으로써, QPSK인 경우 2, 16QAM인 경우 4 가 된다.

Is a value according to a modulation scheme, 2 for QPSK and 4 for 16QAM.

The CQI also has the same basic formula as the ACK / NACK or RI expression. However, since the CRC can be added when the CQI is large and the resource for the RI is always allocated, the amount of resources other than the CQI The equation is slightly modified as shown in Equation (3) below.

&Quot; (3) "

과 같이 정의된다.

는 상기 계산을 수행하는 subframe에서 사용되는 subcarrier와 SC-FDMA 심볼수를 의미한다.

는 rank indicator에 사용되는 bit수를 의미한다. 심볼수를 구하면 CQI에 사용되는 변조 방식에 따라서 채널 코딩 후에 CQI bit를 다음의 <수학식 4>와 같이 구할 수 있게 된다. L is the number of CRC bits. If O is less than or equal to 11 bits, CRC is not inserted, and when exceeding CRC is inserted

.

Denotes the number of subcarriers and SC-FDMA symbols used in the subframe for performing the calculation.

Means the number of bits used in the rank indicator. If the number of symbols is obtained, the CQI bit can be obtained as shown in Equation (4) after channel coding according to the modulation scheme used for the CQI.

&Quot; (4) &quot;

The following describes the multi-carrier transmission system being discussed for the LTE-Advanced system. In the current LTE system, one carrier transmits and receives frequency carriers of one carrier and the terminal also transmits and receives using one frequency carrier. However, the LTE-Advanced system collects and transmits these frequency carriers to increase the maximum data rate and try to use the frequency efficiently. However, in order to support existing LTE terminals, each carrier maintains a basic LTE structure, which is defined as a constituent carrier (carrier), and the entire carrier is an aggregation of this CC. Figure 2 shows the channel structure in uplink when spectrum aggregation is performed. FIG. 2 shows an example in which four constituent carriers are aggregated. There are four CCs from 201 to 204, and each CC sets PUCCH channels 205 and 206 for transmitting UCI to both ends of the same as LTE, and a PUSCH for data transmission is transmitted through the remaining area.

The present invention proposes a method in which a terminal simultaneously transmits UCI and data in a system in which a plurality of carriers are set as in the conventional art. As in LTE, UCI and data are transmitted using PUSCH resources. Unlike LTE, however, since a PUSCH can be allocated to a plurality of carriers, how the UE should multiplex UCI on a plurality of PUSCH resources It is necessary to define the number of PUSCH symbols to be allocated. The present invention proposes a method for selecting a carrier wave, a method for calculating the amount of PUSCH resources for UCI in the PUSCH of the corresponding carrier, and a method and apparatus for multiplexing and transmitting UCI with data.

A method for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme according to the first embodiment of the present invention includes dividing a UCI to be transmitted when a transmitter transmits UCI and data in one subframe by a predetermined amount Transmitting all of the PUSCHs to a plurality of PUSCHs, and extracting and processing UCIs from the plurality of PUSCHs.

In a method for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme according to a second embodiment of the present invention, when a transmitter simultaneously transmits data and UCI, a PUSCH of a plurality of carriers is allocated for data transmission A UCI is transmitted using a PUSCH resource of a specific carrier, and a receiver extracts a PUSCH resource of the specific carrier and processes the PUSCH resource with UCI.

The apparatus for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme according to the first embodiment of the present invention divides a UCI to be transmitted when a UCI and data are simultaneously transmitted in one subframe by a predetermined amount, And a receiver for extracting and processing UCI from a plurality of PUSCHs.

The apparatus for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme according to the second embodiment of the present invention is configured such that when transmitting data and UCI simultaneously, a PUSCH of a plurality of carriers is allocated for data transmission A transmitter for transmitting a UCI using a PUSCH resource of a specific carrier and a receiver for extracting a PUSCH resource of the specific carrier and processing the UCI by UCI.

The apparatus for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme according to the first embodiment of the present invention divides a UCI to be transmitted when a UCI and data are simultaneously transmitted in one subframe by a predetermined amount, And a receiver for extracting and processing UCI from a plurality of PUSCHs.

The apparatus for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme according to the second embodiment of the present invention is configured such that when transmitting data and UCI simultaneously, a PUSCH of a plurality of carriers is allocated for data transmission A transmitter for transmitting a UCI using a PUSCH resource of a specific carrier and a receiver for extracting a PUSCH resource of the specific carrier and processing the UCI by UCI.

The present invention proposes a method for determining the number of resources required for UCI transmission on a PUSCH for each of a plurality of carriers to be transmitted when a UCI and data are simultaneously transmitted using a part of PUSCH resources allocated to a plurality of carriers do. When the method proposed in the present invention is used, it is possible to minimize the influence on the performance degradation of the data and to improve the quality of the UCI.

1 is a diagram illustrating an example of LTE control information transmission;
2 is a diagram showing an example of an uplink channel structure in a multi-carrier transmission system
3 is a diagram showing an example of a control channel transmission method according to the first embodiment;
4 is a diagram illustrating a base station procedure for a preferred implementation of embodiment 1
5 is a diagram illustrating a terminal procedure for a preferred implementation of Embodiment 1
6 is a diagram showing a configuration of a base station apparatus for a preferred implementation of Embodiment 1
7 is a diagram showing a configuration of a terminal device for a preferred embodiment of the first embodiment
8 is a diagram showing an example of a control channel transmission method according to the second embodiment
9 is a diagram showing a terminal procedure for a preferred embodiment of the second embodiment
10 is a diagram illustrating a base station procedure for a preferred implementation of embodiment 2
11 is a diagram showing the configuration of a base station apparatus for a preferred implementation of Embodiment 2
12 is a diagram showing a configuration of a terminal device for a preferred embodiment of the second embodiment
13 is a diagram showing a general performance deterioration degree according to a change in coding rate

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

In the present invention, when data and UCI are transmitted in a system using a multicarrier transmission method using PUSCH resources allocated to data in the same subframe, a method of determining the amount of PUSCH resources required for UCI transmission and the carrier to be transmitted I would like to propose. Detailed methods of the present invention will be described using the following examples.

&Lt; Example 1 >

In the first embodiment of the present invention, when UCI and data are simultaneously transmitted in one subframe, UCI to be transmitted is divided by a certain amount and is divided into a plurality of PUSCHs for transmission.

An example of a transmission scheme to which the first embodiment is applied will be described with reference to FIG. 3 (a) shows a case where a PUSCH resource for uplink data transmission is not allocated.

The UCI to be transmitted is transmitted using each PUCCH channel. For example, a plurality of CQIs or a plurality of HARQ ACK / RI information are transmitted using the PUCCH channels respectively allocated (305, 306, and 307). However, according to the first embodiment of the present invention, when a plurality of PUSCHs are allocated and data and UCI are transmitted at the same time, the UCI is transmitted using some resources of each PUSCH as shown at the right of FIG. 3 (314, 316, 318). All of the UCIs can be distributed over the entire PUSCH so that the frequency diversity gain can be sufficiently obtained.

Hereinafter, a method for calculating the amount of UCI resources needed for each PUSCH according to the present invention will be described. kth When the number of bits of the UCI to be transmitted through the PUSCH is Q_k, Q_k can be obtained using Equation (5) and Equation (6) as follows.

&Quot; (5) &quot;

&Quot; (6) &quot;

는 k번째 PUSCH를 위해서 할당된 서브캐리어의 수,

는 k번째 PUSCH전송을 위해서 사용되는 SC-FDMA의 심볼수 그리고,

는 k번째 PUSCH에서 각 code block별 채널 코딩전의 데이터 bit의 수가 된다.

는 변조 방식에 따른 값으로써, QPSK인 경우 2, 16QAM인 경우 4가 된다. Where O is the number of information bits in the UCI,

Is the number of subcarriers allocated for the k &lt; th &gt; PUSCH,

Is the number of SC-FDMA symbols used for the k &lt; th &gt; PUSCH transmission,

Is the number of data bits before channel coding for each code block in the k-th PUSCH.

Is a value according to a modulation scheme, 2 for QPSK and 4 for 16QAM.

라는 파라메터가 새로 추가된점이다. 다음은 p_k값을 구하는 방법을 설명하도록 한다. 본 발명에서는PUSCH 전송에 미치는 영향을 최소화하기 위해서 다음과 같은 방법들을 이용하여 정의 할 수 있다.The difference from the equation used in LTE is that the ratio of the amount of UCI bits per a plurality of PUSCHs is determined

Is a new parameter. The following explains how to obtain the value of p_k. In the present invention, in order to minimize the influence on the PUSCH transmission, the following methods can be defined.

- Method 1: As a ratio of the number of physical bits that can be transmitted to each PUSCH resource allocated, the ratio of the number of symbols of UCI required in each PUSCH is determined. The p_k value according to the above method can be expressed by the following Equation (7).

&Quot; (7) &quot;

는 상기 계산을 수행하는 subframe에서 각 PUSCH별로 할당받은 subcarrier와 SC-FDMA 심볼수 그리고 변조방식을 의미한다.

Denotes the number of subcarriers allocated to each PUSCH, the number of SC-FDMA symbols, and the modulation scheme in the subframe performing the calculation.

- Method 2: Calculate the number of UCI symbols required on each carrier as a ratio of the number of modulation symbols of each assigned PUSCH resource. The p_k value according to the above method can be expressed by the following Equation (8).

&Quot; (8) &quot;

If the number of symbols required for transmission of UCI for each PUSCH is calculated by the above methods, quality degradation on data can be uniformly applied. For example, suppose that a PUSCH resource is allocated to two carriers as shown in Table 1 below.

Modulation (Qm) # of symbols # of coded bits # of Information bits coderate PUSCH 1 2 150 300 100 0.33 PUSCH 2 4 400 1600 1000 0.625

Here, if the CQI to be transmitted is O = 20 bits, Q 'to be assigned to each PUSCH can be obtained by first obtaining p_k by the methods 1 and 2 and using Equation 3. Here, it is assumed that the number of subcarriers allocated by the PDCCH of the initial transmission, the number of SC-FDMA symbols coincides with the number of sub-carriers and SC-FDMA symbols in the subframe to be transmitted.

In Table 2, when Q 'symbols are used for UCI transmission, the actual code rate is increased because the number of symbols used for actual data is reduced. This is calculated in the fifth column. The sixth column shows the difference between the actual code rate and the code rate of the data if the UCI is not transmitted. In the case where the base station performs scheduling without considering the UCI transmission, the performance of the data of the PUSCH deteriorates as the difference in the code rate increases. If the same PUSCH is allocated to two PUSCHs without using the method 1 or 2, the code rate change of the data of the first PUSCH becomes much larger and the performance deterioration of the PUSCH1 data becomes worse. Method 1 divides the number of UCI symbols by the ratio of the physical bits, which is advantageous in that the code rate changes are exactly the same. In the case of the method 2, by dividing the number of symbols by the number of symbols, the puncturing is performed more in the case of the low modulation scheme, and the code rate is greatly changed. The reason for this is as shown in FIG. 13, since performance deterioration due to a change in code rate occurs more frequently in 16QAM than in QPSK, in order to equalize performance degradation, QPSK allocates many symbols to UCI, We propose a method for assigning symbols to UCI. FIG. 13 is a diagram showing a general performance deterioration degree (Turbo code) according to a change in a code rate.

- Method 3: UCI bits are allocated to each PUSCH in proportion to the frequency efficiency and the number of symbols of the allocated PUSCH resource. Similar to the method 2, however, considering the frequency efficiency more accurately, the PUSCH resource of higher frequency efficiency is used more, so that the quality degradation of the PUSCH can be reduced.

&Quot; (9) &quot;

Since the total number of bits required to transmit one UCI can be obtained by summing the UCI bits allocated to each PUSCH, it can be defined as follows.

여기서 s는 스케쥴링 받은 PUSCH의수가 된다.

Here, s is the number of PUSCHs that are scheduled.

Hereinafter, the procedure of the UE according to the first embodiment of the present invention will be described with reference to FIG.

First, when a UCI transmission occurs (401), the UE checks whether a PUSCH resource for data transmission is allocated in the corresponding subframe. If the PUSCH resource is not allocated, the UE proceeds to step 403 and transmits the UCI using the PUCCH set in advance. If the PUSCH resource is allocated, the process proceeds to step 404 to calculate a Q_k value for each PUSCH allocated. In order to obtain Q_k, Equation (6) or Equation (6) is used. In step 405, the UE calculates Q by summing the Q_k values and channel-codes the UCI so that the output bit is Q. Next, in step 406, the channel-encoded UCI is divided for each PUSCH according to the value of Q_k for each PUSCH. Next, in step 407, data and UCI are multiplexed for each PUSCH. In the multiplexing scheme, ACK / NACK information is inserted instead of the data bit at the corresponding position of the data when ACK / NACK is input. In case of RI, the position of data bits at the corresponding position is shifted backward I will postpone and insert RI. In step 408, the PUSCH is transmitted.

The base station procedure according to the first embodiment of the present invention will now be described with reference to FIG.

First, at the UCI reception time, the BS checks whether the PUSCH is allocated to the corresponding terminal in the corresponding subframe. If the PUSCH is not allocated, since the UE transmits the UCI to the PUCCH, the base station receives the UCI in the PUCCH (507). Otherwise, if the PUSCH for data transmission is allocated, the process proceeds to step 503 where the Q_k value is calculated for each PUSCH. Can also be calculated using Equation 5a or 5b as in the terminal. Next, in step 504, the coded UCI bits are extracted from each PUSCH by the Q_k value. Next, the coded bits extracted in step 505 are collected to perform channel decoding.

Hereinafter, an apparatus of a terminal according to a first embodiment of the present invention will be described with reference to FIG.

First, there are 603,604 channel coding units for each UCI. ACK / NACK and RI use the same channel coding method and therefore use the same channel coding method. The input of the channel coding unit is UCI information, the size is O, and the size of output bit after channel coding is Q. Q is the sum of Q_k values for each PUSCH. Next, there is a divider 605,606 for dividing the coded UCI for each PUSCH. There are 615 UCI transmitters to calculate the Q_k value and the total Q value for each UCI and transmit it to the divider. In order to multiplex coded UCI with data, each PUSCH transmission chain exists as 615,616. M PUSCH allocation and transmission. In each PUSCH transmission chain, multiplexing units 609 and 610 exist for inserting the UCI after the rate matched data by the amount of data to be actually transmitted after encoding. Only CQI information is multiplexed with data through this device. Next, the ACK / NACK or RI information is multiplexed with the data in the interleaver. Therefore, the data after the multiplexing and the ACK / NACK or RI ratio are input to the interleaver as in 611 and 612, respectively. The multiplexed data and the UCI are transmitted using the PUSCH channel through the PUSCH transmitter of 613,614.

Next, a base station apparatus according to the first embodiment of the present invention will be described with reference to FIG.

First, there is a PUSCH reception chain for receiving a PUSCH for each carrier wave. When the UCI is transmitted through the PUSCH resource, the deinterleaver units 711 and 712 detect ACK / NACK and RI. In order to find the detected ACK / NACK and RI amount, ACK / NACK or Qack_1, Qack_M, which are the coded UCI of each PUSCH, are inputted from the UCI receiving controller. Next, in the case of CQI, demultiplexing units 709 and 710 detect it. To do this, the UCI receiver controller receives the Qcqi_1..qcqi_M value. The UCI bits detected from each PUSCH are first transmitted to combiners 705 and 706 for decoding. Here, each coded UCI is generated and then transmitted to a channel decoder 703 and 704 to decode the UCI.

&Lt; Example 2 >

In the second embodiment of the present invention, when data and UCI are simultaneously transmitted and a PUSCH of a plurality of carriers is allocated for data transmission, UCI is transmitted using a PUSCH resource (called a special PUSCH) send.

8 shows an example of the operation according to the second embodiment of the present invention.

Four configuration carriers are used (806, 807, 808, 809). The structure (a) on the left side of FIG. 8 shows an example of a channel using the PUCCH when only UCI is transmitted. 803, 804, and 805, the PUCCH is transmitted using the frequency resources at both ends of each constituent carrier wave. However, when the PUSCH is allocated to the corresponding subframe, it can be seen that the UCI 810 is multiplexed and transmitted to the PUSCH 811 as shown in FIG. 8B. Here, only the first, second, and fourth carriers 814, 815, and 817 are assigned a PUSCH, and UCI is transmitted only to the PUSCH of the fourth carrier 814. This is because only the PUSCH of the fourth carrier is the specialPUSCH of the UE.

Here is how to select special PUSCH.

- Method 1: UCI is transmitted to the PUSCH that is dynamically allocated without being assigned to Semi Persistence Scheduling (SPS). Generally, when SPS is assigned, data size is small, periodically occurs, and data such as delay-sensitive VoIP is applicable. In case of such data transmission, if a part of data resource is used for UCI transmission, it may not be transmitted at once because of puncturing loss. However, delay sensitive data is undesirable because retransmission may degrade the quality. Therefore, when there is a PUSCH not allocated to SPS, it is preferable to transmit UCI to this PUSCH.

Method 2: Multiplex UCI on the PUSCH with the lowest spectral efficiency. As described in the first embodiment, the lower the frequency efficiency, the smaller the loss due to puncturing. Thus, the UCI is multiplexed on the PUSCH having the lowest frequency efficiency and transmitted.

- Method 3: The UCI is multiplexed on the PUSCH belonging to the carrier with the lowest index that has been assigned the PUSCH. This method simply determines the PUSCH required for UCI transmission. However, indexing of carriers can be performed differently for each UE due to high signaling in advance, without using common carrier indexing of cells. For example, a list of UE 1 (carrier 1, carrier 2, carrier 3, and carrier 4) is set and UE 2 is set to (carrier 3, carrier 2, carrier 1, carrier 4) It is also possible.

It is also possible to use the above methods in combination. For example, if there are a plurality of carriers that are dynamically allocated in the first method, it is possible to transmit UCI by dividing UCI by using Embodiment 1, but a PUSCH can be selected by applying Method 2 or Method 3 among a plurality of carriers.

Hereinafter, the procedure of the UE according to the second embodiment of the present invention will be described with reference to FIG.

When the UE arrives at the UCI transmission time, it first checks whether the PUSCH is allocated as in 902. [ If the PUSCH is not allocated, the process proceeds to step 904 to determine a special PUSCH. The method of determining the Special PUSCH is determined by the three methods described above or a combination of these methods. If there is only one carrier to which PUSCH is allocated, this PUSCH becomes a special PUSCH. Next, in step 905, the Q value is calculated. The Q value at this time is calculated using Equations (1) to (4) described in the prior art. After calculating the Q value, in step 906, channel coding is performed for each UCI using the Q value. Next, in step 907, data to be transmitted on the special PUSCH and UCI are multiplexed and transmitted.

The base station procedure according to the second embodiment of the present invention will now be described with reference to FIG.

When the UCI reception time comes, the base station checks whether the PUSCH is allocated to the corresponding terminal (1002). If the PUSCH does not exist, the UE proceeds to step 1003 and receives the UCI using the PUCCH set in advance. If not, the special PUSCH is selected in step 1004. A method of selecting a special PUSCH is to select one of the above-described methods or a combination of methods in the same manner as the terminal. Next, the Q value is calculated using Equation (1) to Equation (4) using the special PUSCH information and UCI information. Next, as in 1006, UCI is extracted by Q from the Special PUSCH. Since the bits are coded, channel decoding of the extracted UCI is performed to obtain information.

 Next, an apparatus for a terminal according to a second embodiment of the present invention will be described with reference to FIG.

It is an example of a terminal supporting M PUSCH. First, channel coding is performed for each UCI type such as 1101 and 1102 in order to channel-code UCI information. Since the size of the output bit varies according to the frequency efficiency of the allocated PUSCH, the UCI transmission controller 1103 exists to notify it. The UCI transmission controller selects a special PUSCH to transmit the UCI according to the procedure of the above-described terminal, determines a Q value according to the frequency efficiency of the special PUSCH, and transmits it to each channel coding unit. There is a PUSCH transmission chain for each carrier (1111, 1113). In the transmission chain, the CQI of the UCI is added in data and multiplication (1106, 1107), and the ACK / NACK or RI is added in the interleaver units 1108, 1109. In Embodiment 2, since only the special PUSCH selected is multiplexed with UCI and data, switches such as 1104 and 1105 exist. When the special PUSCH is selected in the UCI transmission controller, it operates accordingly.

Next, a base station apparatus according to a second embodiment of the present invention will be described with reference to FIG.

And supports M PUSCHs. Each PUSCH reception chain exists as 1212, 1213, and so on. Each receive chain has PUSCH receivers 1210 and 1211, deinterleavers 1208 and 1209, and demultiplexers 1205 and 1026. In case of CQI, it is extracted from the demultiplexer since it is inserted in the multiplexer. In case of ACK / NACK or RI, it is inserted in the interleaver and extracted from the deinterleaver. When extracting UCI, we need to know the number of bits used by UCI, so there are 1207 UCI receiving controllers to calculate the Q value. In the UCI receiver controller, a special PUSCH is selected to determine from which PUSCH the UCI is to be extracted, and the Q value calculated in the reception chain of the PUSCH is transmitted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims, and equivalents thereof.

Claims (4)

A method for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme,
Dividing a UCI to be transmitted when a transmitter simultaneously transmits UCI and data in one subframe, dividing the UCI by a predetermined amount and dividing the UCI into a plurality of PUSCHs,
And extracting UCI from a plurality of PUSCHs and processing the processed UCI.
A method for transmitting uplink control information in a wireless communication system using a multicarrier transmission scheme,
Transmitting a UCI using a PUSCH resource of a specific carrier when a transmitter transmits data and a UCI at the same time and a PUSCH of a plurality of carriers is allocated for data transmission;
Wherein the receiver extracts a PUSCH resource of the specific carrier and processes the extracted PUSCH resource as a UCI.
An apparatus for transmitting uplink control information in a wireless communication system using a multi-carrier transmission scheme,
A transmitter for dividing a UCI to be transmitted when a UCI and data are simultaneously transmitted in one subframe by a predetermined amount and dividing the UCI into a plurality of PUSCHs,
And a receiver for extracting and processing UCI from a plurality of PUSCHs.
An apparatus for transmitting uplink control information in a wireless communication system using a multi-carrier transmission scheme,
A transmitter that transmits UCI using PUSCH resources of a specific carrier when a PUSCH of a plurality of carriers is allocated for data transmission,
And a receiver for extracting a PUSCH resource of the specific carrier and processing the extracted PUSCH resource by UCI.

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