KR101455858B1 - Method and apparatus for transmission of uplink control channel acknowledgement channel for downlink control channel in mobile communication systems using orthogonal frequency division multiple access - Google Patents

Method and apparatus for transmission of uplink control channel acknowledgement channel for downlink control channel in mobile communication systems using orthogonal frequency division multiple access Download PDF

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Publication number
KR101455858B1
KR101455858B1 KR20070099538A KR20070099538A KR101455858B1 KR 101455858 B1 KR101455858 B1 KR 101455858B1 KR 20070099538 A KR20070099538 A KR 20070099538A KR 20070099538 A KR20070099538 A KR 20070099538A KR 101455858 B1 KR101455858 B1 KR 101455858B1
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South Korea
Prior art keywords
control channel
channel
demodulation
downlink
downlink control
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KR20070099538A
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Korean (ko)
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KR20090034254A (en
Inventor
유재천
이준영
임연주
김대균
조준영
권환준
이주호
김동희
허윤형
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삼성전자주식회사
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Priority to KR20070099538A priority Critical patent/KR101455858B1/en
Priority to PCT/KR2008/005782 priority patent/WO2009045048A2/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058Allocation criteria
    • H04L5/0064Rate requirement of the data, e.g. scalable bandwidth, data priority

Abstract

The present invention relates to a method and apparatus for transmitting an uplink control channel response channel for a downlink control channel in an orthogonal frequency division multiple access (OFDM) mobile communication system. A method according to an embodiment of the present invention is a method of transmitting an uplink control channel response channel in an orthogonal frequency division multiple access (OFDM) mobile communication system. The method includes receiving a downlink control channel for data demodulation and a data to be demodulated Determining whether to transmit the uplink control channel response channel based on the amount of a control channel element used by the downlink control channel, determining whether the downlink control channel and the data channel are successfully demodulated, And transmitting an uplink control channel response channel for the downlink control channel and the data channel.

Figure R1020070099538

(OFDMA), an acknowledgment channel, a physical uplink response channel (PUACKCH), a physical downlink control channel (PDCCH)

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for transmitting uplink control channel response channels for a downlink control channel in a mobile communication system using an orthogonal frequency division multiple access (OFDMA) scheme, and a method and apparatus for transmitting uplink control channel response channels for a downlink control channel. DIVISION MULTIPLE ACCESS}

The present invention relates to a method and apparatus for transmitting an uplink control channel response channel for a downlink control channel in an orthogonal frequency division multiple access (OFDM) mobile communication system.

2. Description of the Related Art In recent mobile communication systems, orthogonal frequency division multiplexing (OFDM) has been actively studied as a useful method for high-speed data transmission in a wired / wireless channel. The OFDM scheme is a scheme for transmitting data using a multi-carrier. The OFDM scheme converts a serial symbol sequence in parallel and converts the serial symbols into a plurality of subcarriers (orthogonal subcarriers) Carrier Modulation (MCM) scheme, which modulates and transmits signals on a plurality of subcarriers, that is, a plurality of subcarrier channels.

A system employing such a multi-carrier modulation scheme was first applied to military communications in the late 1950's, and an OFDM scheme that overlaps a plurality of orthogonal subcarriers started to develop from the 1970s, but the implementation of orthogonal modulation between multi- Because it was very difficult, there was a limit to practical system application. However, in 1971, Weinstein et al. Announced that it was possible to efficiently process using a DFT (Discrete Fourier Transform) as a modulation and demodulation method using the OFDM scheme, and the technology development for the OFDM scheme rapidly developed. Also, since a guard interval is used and a method of inserting a cyclic prefix (CP) symbol into a guard interval is known, it is possible to further reduce the adverse effect of the system on multipath and delay spread .

Due to such technological advances, the OFDM technique can be applied to a digital audio broadcasting system such as Digital Audio Broadcasting, Digital Video Broadcasting, Wireless Local Area Network (WLAN), and Wireless Asynchronous Transfer Mode And is widely applied to digital transmission technology. That is, the OFDM scheme can not be widely used due to hardware complexity. Recently, a fast Fourier transform (FFT) and an inverse fast Fourier transform (IFFT) And so on). The OFDM scheme is similar to a conventional frequency division multiplexing (OFDM) scheme. However, the OFDM scheme maintains orthogonality between a plurality of subcarriers, and transmits the orthogonality of the subcarriers. . Also, the OFDM scheme is characterized in that it has a high frequency use efficiency and is resistant to multi-path fading, thereby achieving optimal transmission efficiency in high-speed data transmission.

Another advantage of the OFDM scheme is that it uses the frequency spectrum in an overlapping manner, which is efficient in frequency use, strong in frequency selective fading, robust against multipath fading, and inter-symbol interference , Hereinafter referred to as "ISI"), and it is possible to easily design an equalizer structure in hardware. Also, the OFDM scheme has an advantage of being strong against impulse noise, and can be utilized in a communication system structure.

On the other hand, HARQ is one of important techniques used for increasing the reliability of data transmission and data throughput in a packet-based mobile communication system. The HARQ refers to a technique that combines ARQ (Automatic Repeat Request) technology and FEC (Forward Error Correction). ARQ is a technique widely used in wired and wireless data communication systems in which a transceiver assigns a serial number to data packets transmitted according to a predetermined promised method and transmits the data to a data receiver, Quot; refers to a technique that achieves reliable data transmission by requiring the number to be retransmitted to the transmitter. In the above, FEC refers to an error occurring in an environment such as noise or fading that occurs in a data transmission / reception process by adding a redundant bit according to a predetermined rule to data to be transmitted, such as convolutional coding or turbo coding, And to demodulate the originally transmitted data. In a system using HARQ combined with the above two techniques, i.e., ARQ and FEC, the data receiver performs a predetermined FEC inverse process on the received data, and determines whether there is an error through a CRC (Cyclic Redundancy Check) Can be determined. If there is no error, an ACK (Acknowledgment) is fed back to the transmitter to cause the transmitter to transmit the next data packet. On the other hand, if it is determined that there is an error in the received data as a result of the CRC check, the transmitter retransmits the previously transmitted packet by feeding back NACK (Non-Acknowledgment).

FIG. 1 is a diagram illustrating an example of a general HARQ scheme. In FIG. 1, a horizontal axis represents a time axis.

Reference numeral 101 denotes an initial transmission. In FIG. 1, the data channel indicates a channel through which data is actually transmitted. The receiver receiving the data transmission of the reference numeral 101 attempts to demodulate the data channel. If the data transmission is not demodulated successfully, the NACK is fed back to the data transmitter. Upon receiving a NACK such as the reference numeral 102 on the transmitting side, the data channel transmitter performs retransmission as indicated by reference numeral 103 by retransmission for the initial transmission of the reference numeral 101. Therefore, it is noted that the initial transmission of the reference numeral 101 and the data channel of the retransmission of the reference numeral 103 transmit the same information. Note that even though the same information is transmitted, it may contain different redundancies.

Hereinafter, each transmission for transmitting the same information represented by data transmissions that transmit the same information, that is, reference numerals 101, 103, and 105, will be referred to as a subpacket. The receiver receiving the data transmission of the reference numeral 103 performs a combination according to a predetermined rule and the initial transmission data received at the reference numeral 101 for the retransmission of the reference numeral 103, Attempt to demodulate the channel. If it is determined that the data transmission has not been successfully demodulated through the CRC for the data channel, the NACK is fed back to the data transmitter as indicated by reference numeral 104

The data channel transmitter having received the NACK of the reference numeral 104 performs a second retransmission as indicated by reference numeral 105 after a predetermined time interval from the first retransmission time of the reference numeral 103.

Therefore, the initial transmission of the reference numeral 101 and the first retransmission of 103 and the data channel of the second retransmission reference 105 all transmit the same information. The receiver receiving the second retransmission data of the reference number 105 combines the initial transmission of the reference numeral 101, the first retransmission of the reference numeral 103, and the third retransmission of the reference numeral 105 according to a predetermined rule And performs demodulation of the data channel by using it. It is assumed that the data transmission has been successfully demodulated through the CRC for the data channel. In this case, the data receiver feeds back the ACK 106 to the data transmitter. Upon receiving the ACK of reference numeral 106, the data transmitter transmits an initial transmission subpacket for the next data information as indicated by reference numeral 107. The initial transmission of reference numeral 107 may be performed immediately after receiving the reference numeral 106, or may be transmitted after a certain amount of time, depending on a predetermined scheduling result.

In order to support HARQ as described above, ACK / NACK feedback is transmitted in the data receiver, and a channel for transmitting the ACK / NACK is referred to as ACKCH.

FIG. 2 shows a relationship between a physical downlink control channel (PDCCH) structure and a physical uplink control channel (PUCCH). The PDCCHs 202 to 204 are made up of control channel elements (CCEs) 201, and one PDCCH can use one or several CCEs. As shown in FIG. 2, each PDCCH can be used for downlink grant (DL GRANT). That is, it can be used for resource allocation of a physical downlink shared channel (PDSCH). The UE having allocated the PDSCH resource through the PDCCH transmits ACK / NACK information (ACK / NACK) information through a response channel (ACKCHCH) 206 resource mapped to the first CCE of each PDCCH to the data transmitted through the allocated PDSCH resource . The ACKCH resource allocated in the above manner is transmitted to a Physical Uplink Acknowledge Channel (PUACKCH) 208 used as a response of the PDSCH. Here, on / off keying (OOK) can be used as a method of transmitting an ACK / NACK of the PUACKCH, and the ACK may be set to transmit a signal and the NACK may not be set to be transmitted. The base station uses Non Coherent Detection when receiving. The reason that the PDCCH has one or several CCEs can transmit different length information according to the nature of the DL GRANT and does not use the same length, thereby increasing the efficiency of downlink resources. However, when transmitting an uplink ACK / NACK, it is assumed that an ACKCH resource is allocated to each CCE of a PDCCH, and an ACKCH resource must be allocated equal to the number of CCEs. However, when the PDCCH has a plurality of CCEs, some of the uplink ACKCH resources mapped to the CCE may not be used, thereby reducing resource efficiency.

Therefore, one aspect of the present invention provides a method and apparatus for efficiently using uplink resources in an orthogonal frequency division multiple access (OFDM) mobile communication system.

According to another aspect of the present invention, there is provided a method and an apparatus for transmitting an uplink control channel response channel for a downlink control channel in an orthogonal frequency division multiple access (OFDM) mobile communication system.

A method according to an embodiment of the present invention is a method for transmitting an uplink control channel response channel for a downlink control channel in a mobile communication system using an orthogonal frequency division multiple access scheme, Determining whether the demodulation is successful by demodulating the downlink control channel and the downlink shared channel; determining whether the number of the control channel elements or the resource And a physical uplink control channel response channel (PUCACKCHCH) as an acknowledgment channel resource mapped in advance to the control channel element or the resource block according to the demodulation success of the downlink control channel and the downlink shared channel, ) Information indicating the success or failure of the downlink control channel demodulation And transmitting the data.
In an apparatus for transmitting an uplink control channel response channel for a downlink control channel in an orthogonal frequency division multiple access (OFDM) mobile communication system, an apparatus according to an exemplary embodiment of the present invention includes a control channel element Determines the number of resource blocks included in the number of control channel elements or the number of resource blocks included in the downlink shared channel, demodulates the downlink control channel and the downlink shared channel to determine demodulation success, And a physical uplink control channel response channel (PUCACKCH) is allocated as an acknowledgment channel resource mapped in advance to the control channel element or the resource block according to whether demodulation succeeds in the downlink control channel and the downlink shared channel. And controls the transmission unit to transmit the downlink control channel demodulation success information .
In another aspect of the present invention, there is provided a method of receiving an uplink control channel response channel in a mobile communication system using an orthogonal frequency division multiple access scheme, the method comprising: Determining whether there are a plurality of resource blocks included in the shared channel, and determining whether there are a plurality of resource blocks in the physical uplink control channel response channel (PUCACKCH) and / And determining whether to transmit the next packet according to whether the link response channel (PUACKCH) is ACK.
Another apparatus according to an embodiment of the present invention is a base station for receiving an uplink control channel response channel in a mobile communication system of an orthogonal frequency division multiple access scheme, the base station comprising: a plurality of control channel elements included in a downlink control channel; And determines whether the number of the resource blocks included in the downlink shared channel is plural or not. If the number of the control channel elements or the number of the resource blocks is plural, the physical uplink control channel response channel (PUCACKCH) and / And a control unit for determining whether to transmit the next packet according to whether the link response channel (PUACKCH) is ACK.

In the present invention, ACK / NACK information for a PDCCH is transmitted according to the number of CCEs used in one PDCCH transmission or the number of RBs allocated to a PDSCH in an orthogonal frequency division multiple access (OFDM) mobile communication system, It is possible to increase downlink power efficiency or to increase the efficiency of downlink resources by transmitting a new packet when PDCCH transmission fails.

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.

3A is a diagram illustrating a method of transmitting a physical uplink control channel response channel according to an embodiment of the present invention.

3A, a remaining ACKCH resource except a PUACKCH (Physical Uplink Acknowledge Channel) used as an ACKCH for a PDSCH among uplink ACKCHs allocated based on a downlink CCE is used as a physical uplink control channel response channel Uplink Control Channel Acknowledge Channel: PUCACKCH). ACKCH 1, ACKCH 2, ACKCH 4, ACKCH 5, ACKCH 7, and ACKCH 10 (311, 312, 314, and 316) are transmitted from the PDSCH to the PDSCH. 315, 317, and 320 through the PUACKCHs 1-6. ACKCH3, ACKCH6, ACKCH8, ACKCH9 (313, 316, 318, 319) connected to the CCE included in the PDCCH among the resources not used as PUACKCH are used as PUCACKCH.

3A, PDCCH1 323 uses one CCE, i.e., CCE1, and uses ACKCH1, which is an uplink ACKCH mapped to CCE1, as PUACKCH1 for PDSCH. PUCACKCH for PDCCH can not be used because there is no other ACKCH mapped to PDCCH1. On the other hand, in the case of PDCCH2 324, CCE2 and CCE3 are used, and CCE2 and CCE3 are mapped to uplink ACKCH2 and ACKCH3, respectively. The ACK / NACK information for the downlink PDSCH is transmitted to the ACKCH2 through the PUACKCH2, and the ACK / NACK information for the PDCCH is transmitted to the ACKCH3 using the PUCACKCH2. On the terminal side, it is possible to send only one of two channels without transmitting both PUACKCH and PUCACKCH channels, and to transmit the values of other channels implicitly. This will be described in detail through the following description. If there are more than two ACKCH resources remaining as PUACKCH, ACK / NACK for PDCCH can use ACKCH with the smallest index or the largest index, or send the same information to all remaining resources have. That is, PDCCH 5 transmits control information using CCE 7, CCE 8, and CCE 9. Therefore, ACK / NACK information for PDSCH is transmitted to ACKCH 7 through PUACKCH 5, and ACK / NACK information for PDCCH is transmitted through ACKCH 8 or ACKCH 9, or ACK / NACK information to both ACKCH 8 and ACKCH 9. The above method is also applied to the case of using the PUCACKCH in the RB-based ACKCH described in 3b.

3B is a diagram illustrating a method of transmitting a physical uplink control channel response channel according to another embodiment of the present invention.

FIG. 3B illustrates a PUCACKCH resource allocation method in the case of configuring an uplink ACKCH based on a resource block (RB) of a PDSCH allocated from a PDCCH according to another embodiment of FIG. 3A described above. Each PDSCH is composed of one or more RBs, and each RB has ACKCH resources 905 to 914 mapped on the uplink. ACKCH 1, ACKCH 2, ACKCH 4, ACKCH 5, ACKCH 7, and ACKCH 10 (905, 906, 908, 909. 911. 914) are transmitted through the PUACKCHs 1 to 6 using the resources. ACKCH 3, ACKCH 6, ACKCH 8, and ACKCH 9 (907, 910, 912, and 913) connected to the RBs included in the PDSCH among the resources not used as PUACKCH are used as PUCACKCH. In the embodiment of FIG. Includes one RB, i.e., RB1, and can not use PUCACKCH because ACKCH1, which is a mapped uplink ACKCH, is used as PUACKCH1 and no other ACKCH mapped to PDSCH1 exists. On the other hand, PDSCH2 903 has RB2 and RB3, and RB2 and RB3 are mapped to uplink ACKCH2 and ACKCH3, respectively. If the PDSCH2 is used in the downlink, ACK / NACK information for the PDSCH is transmitted using ACKCH2 using PUACKCH2, and ACK / NACK information for the PDCCH is transmitted using ACKCH3 using PUCACKCH2. The RB-based mappings described above are not limited only to RBs, but may be grouped into one or more RBs, so that uplink ACKCH resources are mapped and operated. In the following description, ACKCH resources are allocated in units of one RB.

4 is a view illustrating an operation of a UE according to whether a PDSCH and a PDCCH are successfully demodulated according to an embodiment of the present invention.

PUACKCH and PUCACKCH are control channels for transmitting ACK / NACK information of PDSCH and PDCCH, respectively, and BPSK, QPSK and OOK can be used for modulation and demodulation. When BPSK or QPSK is used in the modulation / demodulation scheme, the NACK of the PDSCH, which is the ACK / NACK information for the PDSCH, is constellated into one modulation symbol according to the modulation scheme. That is, the PDCCH as a control channel succeeds in demodulation, Which means that they did not succeed. Therefore, in this case, since the ACK / NACK information for the PDSCH includes information on the demodulation success of the PDCCH, a PUCACKCH having ACK / NACK information for the PDCCH is not required. However, when the OOK modulation / demodulation scheme is used for ACK / NACK transmission of the PDSCH and the NACK information of the PDSCH is mapped to OFF in which the signal is not transmitted, the base station receiving the ACK / NACK of the PDSCH can not normally demodulate the PDCCH and receive the PDSCH It is impossible to distinguish whether the PDSCH has been successfully demodulated or the PDSCH demodulation has failed. Therefore, the PUCACKCH having the ACK / NACK information for the PDCCH transmits the demodulation success or failure to the PDCCH, thereby enhancing the reliability of the PDCCH sent from the base station, thereby facilitating the resource recovery of the PDSCH indicated by the PDCCH when the PDCCH fails. In addition, the power used for the initial transmission of the PDCCH can be reduced.

The operation of the UE according to the values of PUACKCH and PUCACKCH when the OOK modulation / demodulation scheme is used will be described with reference to FIG. The base station transmits the DL GRANT using the PDCCH 401 and simultaneously transmits the data through the PDSCH 402 at the time of initial transmission or retransmission. The UEs receiving the PDCCH and the PDSCH determine whether or not to transmit the PUACKCH / PUCACKCH 403 in the OOK scheme according to the demodulation success of the PDCCH and PDSCH, and the operation of each case is shown in Table 1 below.

PDSCH Decoded PUACKCH PDCCH Decoded PUCACKCH UE operation 0 0 Not Sending 0 One PUCACKCH: ACK X 0 No Action One One PUACKCH: CAK

In the first case, the PDSCH demodulation fails, that is, when the PUCACKCH is NACK and the PDCCH is failed, that is, when the PUCACKCH is NACK, the UE does not transmit anything according to the OOK modulation / demodulation scheme. In the second case, if the PDSCH fails to demodulate and the PDCCH succeeds in demodulation, the terminal transmits only the ACK of the PUCACKCH so that the PDCCH demodulates successfully to the base station, and the PDSCH demodulation fails and the retransmission can be instructed. In the third case, the PDSCH succeeds in demodulation and the PDCCH fails in demodulation. In this case, the UE does not perform any operation. That is, since the PDCCH demodulation has failed and the DL GRANT transmitted through the PDCCH is not received, it can be said that it is the same as the first case. In the fourth case, the PDSCH succeeds in demodulation, and if the PDCCH succeeds in demodulation, the UE transmits a PUACHCK ACK to the PDSCH to inform the base station that the PDCCH and the PDSCH demodulation are successful. That is, the successful demodulation of the PDSCH implies that the demodulation of the PDCCH has been implicitly performed. Therefore, it is not necessary to separately transmit the ACK / NACK information for the PDCCH. As for the above four cases, there is no case where PUACKCH and PUCACKCH are simultaneously transmitted. By not simultaneously transmitting the two channels, the single carrier characteristic can be maintained in the uplink, and the reliability of the control channel can be increased by using ACK / NACK for the PDSCH and the PDCCH.

5 is a block diagram illustrating an apparatus for transmitting a PUCACKCH and a PUCACKCH according to an embodiment of the present invention. The demodulation success or failure of the PDCCH is transmitted to the PUCCH transmitter 501 through the PUCACKCH, and the demodulation success or failure of the PDSCH is transmitted to the PUCCH transmitter through the PUCACKCH. The two types of information thus transmitted are transmitted to the controller 506 together with information on whether the PDCCH is composed of a plurality of CCEs or whether the PDSCH is composed of a plurality of RBs. The controller 506 then controls the transmission selection of the PUACKCH or PUCACKCH of the selector 502 using the above information. The control operation of the controller 506 will be described in detail with reference to FIG. The selected response (ACK / NACK) information is input to the IFFT 503 together with the PUSCH data transmitted through the PUSCH transmitter 508 and then transmitted through the transmitter 505 after attaching the Cyclic prefix 504 to the PUSCH.

FIG. 6 is a control flowchart for transmitting a PUCACKCH and a PUACKCH according to an embodiment of the present invention.

The UE checks in step 601 whether the PDCCH demodulation has succeeded. If demodulation is not successful, the UE moves to step 606 and ends without sending any response signal. If the PDCCH demodulation is successful in step 601, the BS proceeds to step 602 and checks whether the PDCCH includes multiple CCEs or whether the PDSCH includes multiple RBs. If the PDCCH does not include a plurality of CCEs or if the PDSCH does not include a plurality of RBs in step 602, the BS proceeds to step 604 and checks whether PDSCH demodulation is successful. If the PUSCH demodulation fails in step 604, the process proceeds to step 606 and ends without sending any response signal. If the PDSCH demodulation is successful in step 604, the mobile station proceeds to step 605 and transmits an ACK signal through the PUACKCH. If the PDCCH includes a plurality of CCEs or if the PDSCH includes several RBs in step 602, it proceeds to step 603 and checks if the PDSCH demodulation is successful. If the PDSCH demodulation is successful in step 603, ACK information is transmitted through the PUACKCH in step 605 and is terminated. If the PDSCH demodulation fails in step 603, ACK information is transmitted through the PUCACKCH in step 607 and is terminated.

7 is a block diagram of an apparatus for receiving PUCACKCH and PUACKCH according to an embodiment of the present invention.

The RF receiving unit 701 down-converts the signal transmitted through the radio (RF) signal and outputs the signal. The signal that has passed through the RF receiver 701 is removed from the CP remover 702 by a cyclic prefix and then transmitted to the PUCACKCH receiver 704, the PUACKCH receiver 705, and / or the PUSCH receiver 705 via the FFT processor 703. [ (708). The base station transmits to the controller 709 information on the size (size) of the PDCCH related to the ACK / NACK information of the current reception time, that is, the number of CCEs constituting the PDCCH or the number of the RBs constituting the PDSCH, (709) controls the selector (706) using the information. The selector 706 selects a reception signal of the PUCACKCH receiver 704 or the PUACKCH receiver 705 under the control of the controller 709 and transmits the signal to the HARQ controller 707. The information selected in the selector 706 is used in the HARQ controller 707 to support the HARQ operation. The control operation of the controller 709 will be described in detail with reference to FIG.

FIG. 8 is a control flow chart for PUCACKCH and PUACKCH reception according to an embodiment of the present invention.

In step 801, the transmitter receives PDCCH size information from the system information. That is, information on the number of CCEs constituting the PDCCH associated with ACK / NACK information of the current reception time or the number of RBs constituting the PDSCH is confirmed. In step 802, it is determined whether the PDCCH includes multiple CCEs or whether the PDSCH uses multiple RBs. As a result of the determination in step 802, if multiple CCEs or RBs are not used, step 805 is performed to determine whether the PUACKCH is ACK. If the ACK is not ACK, the BS proceeds to step 806 and transmits the next subpacket of the current packet through the PDSCH. If the PUACKCH is ACK in step 805, the mobile station moves to step 807 and transmits a new packet through the PDSCH. In step 802, if the PDCCH uses multiple CCEs or multiple RBs are used on the PDSCH, it is checked in step 803 whether the PUACKCH is ACK. If the PUACKCH is ACK, the mobile station moves to step 807 and transmits a new packet through the PDSCH. If the PUACKCH is a NACK in step 803, the BS proceeds to step 804 and checks whether the PUCACKCH is ACK. If it is determined in step 804 that the PUCACKCH is ACK, the mobile station moves to step 806 and transmits the next subpacket through the PDSCH. If the PUCACKCH is not ACK, it moves to step 807 and transmits a new packet through the PDSCH. In step 807, the transmission of the new packet is not necessarily continuous and may be performed after an arbitrary point in time according to the scheduling result of the base station.

1 is a diagram illustrating an example of a general HARQ;

2 is a diagram showing the relationship between the structure of the PDCCH and the PUCCH,

FIG. 3A illustrates a physical uplink control channel response channel transmission method according to an embodiment of the present invention,

FIG. 3B illustrates a physical uplink control channel response channel transmission method according to another embodiment of the present invention,

4 is a diagram illustrating an operation of a UE according to whether a PDSCH and a PDCCH are successfully demodulated according to an embodiment of the present invention.

5 is a block diagram of a transmitting apparatus for transmitting a PUACKCH and a PUCACKCH according to an embodiment of the present invention.

FIG. 6 is a control flow chart for PUCACKCH and PUACKCH transmission according to an embodiment of the present invention,

FIG. 7 is a block diagram of a PUCACKCH and a PUACKCH receiving apparatus according to an embodiment of the present invention;

FIG. 8 is a flowchart illustrating a PUCACKCH and a PUACKCH reception according to an embodiment of the present invention. FIG.

Claims (20)

A method for transmitting an uplink control channel response channel for a downlink control channel in an orthogonal frequency division multiple access (OFDMA) mobile communication system, Determining a number of control channel elements included in the downlink control channel or a number of resource blocks included in the downlink shared channel; Demodulating the downlink control channel and the downlink shared channel to determine a demodulation success; Wherein the number of the control channel elements or the number of the resource blocks is plural and the response channel resource mapped in advance to the control channel element or the resource block according to the demodulation success of the downlink control channel and the downlink shared channel And transmitting information indicating the success or failure of the downlink control channel demodulation through a physical uplink control channel response channel (PUCACKCH). The method according to claim 1, Wherein the transmitting comprises: And if the demodulation of the downlink control channel is successful and the demodulation of the downlink shared channel fails, the information is an ACK. The method according to claim 1, Wherein the demodulation of the downlink control channel fails and the demodulation of the downlink shared channel is successful, the UE does not operate. The method according to claim 1, Wherein when the demodulation of both the downlink control channel and the downlink shared channel fails, the terminal does not transmit the information according to an on / off keying (OOK) scheme. The method of claim 1, wherein the transmitting comprises: And if the demodulation of the downlink control channel and the downlink shared channel is successful, the UE transmits an ACK through a physical uplink response channel (PUACKCH). An apparatus for transmitting an uplink control channel response channel for a downlink control channel in an orthogonal frequency division multiple access (OFDMA) mobile communication system, Determining the number of control channel elements included in the downlink control channel or the number of resource blocks included in the downlink shared channel, demodulating the downlink control channel and the downlink shared channel, Wherein the number of the control channel elements or the number of the resource blocks is plural and the response channel resource mapped in advance to the control channel element or the resource block according to the demodulation success of the downlink control channel and the downlink shared channel And a controller for controlling the transmitter to transmit the downlink control channel demodulation success information through the physical uplink control channel response channel (PUCACKCH). The method according to claim 6, And controls the transmitter to transmit an ACK of the physical uplink control channel response channel (PUCACKCH) to the information when demodulation of the downlink control channel is successful and demodulation of the downlink shared channel fails. Terminal. The method according to claim 6, Wherein if the demodulation of the downlink control channel fails and demodulation of the downlink shared channel is successful, the control unit controls the terminal not to operate. The method according to claim 6, Wherein if the demodulation of both the downlink control channel and the downlink common channel fails, the control unit controls the transmission unit so as not to transmit the information according to an on / off keying (OOK) scheme. The method according to claim 6, Wherein the control unit controls the transmission unit to transmit an ACK through a physical uplink response channel (PUACKCH) when demodulation of the downlink control channel and the downlink shared channel is successful. A method for receiving an uplink control channel response channel in an orthogonal frequency division multiple access (OFDMA) mobile communication system, Determining whether there are a plurality of control channel elements included in the downlink control channel or a plurality of resource blocks included in the downlink shared channel; If there are a plurality of the control channel elements or the number of the resource blocks, whether to transmit the next packet according to whether the physical uplink control channel response channel (PUCACKCH) and / or the physical uplink response channel (PUACKCH) And transmitting the uplink control channel response channel to the uplink control channel. 12. The method of claim 11, Receiving an ACK of the PUCACKCH when the demodulation of the downlink control channel is successful and the demodulation of the downlink shared channel is unsuccessful. 12. The method of claim 11, And if the demodulation of the downlink control channel fails and demodulation of the downlink shared channel is successful, a response signal is not received from the terminal. 12. The method of claim 11, If both of the downlink control channel and the downlink shared channel are failed to be demodulated, the UE receives an uplink control channel response channel including a process of not receiving a response signal from the UE according to an On / Off Keying (OOK) Way. 12. The method of claim 11, And receiving an ACK of the PUACKCH from the UE if both of the downlink control channel and the downlink shared channel are successfully demodulated. A base station for receiving an uplink control channel response channel in an orthogonal frequency division multiple access (OFDMA) mobile communication system, Determining whether there are a plurality of control channel elements included in the downlink control channel or a plurality of resource blocks included in the downlink shared channel; and if the number of the control channel elements or the number of the resource blocks is plural, And a controller for determining whether to transmit the next packet according to whether the physical uplink control channel response channel (PUCACKCH) and / or the physical uplink response channel (PUACKCH) is ACK. 17. The method of claim 16, And a receiver for receiving an ACK of the PUCACKCH if demodulation of the downlink control channel is successful and demodulation of the downlink shared channel fails. 17. The method of claim 16, Wherein when the demodulation of the downlink control channel fails and demodulation of the downlink shared channel is successful, the control unit recognizes that no response signal is received from the terminal. 17. The method of claim 16, When the demodulation of both the downlink control channel and the downlink shared channel fails, the control unit recognizes that a response signal is not received from the terminal according to the On / Off Keying (OOK) method from the terminal Base station. 17. The method of claim 16, And a receiver for receiving an ACK of the PUACKCH from the UE if demodulation of the downlink control channel and the downlink shared channel is successful.
KR20070099538A 2007-10-02 2007-10-02 Method and apparatus for transmission of uplink control channel acknowledgement channel for downlink control channel in mobile communication systems using orthogonal frequency division multiple access KR101455858B1 (en)

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