KR20060015232A - Receiving success signal transmission method and reception success determination method in uplink packet transmission - Google Patents
Receiving success signal transmission method and reception success determination method in uplink packet transmission Download PDFInfo
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Abstract
본 발명은 상향 링크로 전송되는 패킷에 대한 수신성공여부(ACK/NACK) 신호 전송 방법에 있어서, 이동국으로부터 전송된 패킷을 수신하는 단계와, 상기 패킷을 디코딩 하여, 수신 성공 여부를 판단하는 단계 및 상기 판단 결과에 따라 수신성공(ACK) 신호 혹은 수신실패(NACK) 신호를 전송하되, 상기 수신성공 신호와 수신실패 신호의 송신 전력을 다르게 할당하여 전송하는 단계 및 NACK 신호의 송신 전력을 상위계층 제어에 의해 ON/OFF 시키는 단계를 포함하여 이루어지는 수신성공여부 신호 전송 방법에 관한 것으로써, 하향 링크 ACK/NACK 송신 전력을 각 신호의 수신 품질 요구에 따라 최적화 함으로써 효율적으로 시스템을 운용할 수 있는 효과가 있다. The present invention provides a method for transmitting an ACK / NACK signal for a packet transmitted on an uplink, the method comprising: receiving a packet transmitted from a mobile station, decoding the packet, and determining whether the reception is successful; Transmitting an acknowledgment (ACK) signal or a failing signal (NACK) signal according to the determination result, allocating and transmitting different transmission powers of the reception success signal and the reception failure signal, and controlling higher layer transmission power of the NACK signal. The present invention relates to a method for transmitting or receiving a received signal, comprising the step of turning on and off by the method. The method for efficiently operating a system by optimizing downlink ACK / NACK transmission power according to a reception quality request of each signal has an effect. have.
혼합 자동 재전송 요구(HARQ), 수신성공여부, 강화 데이터 채널Mixed Automatic Retransmission Request (HARQ), Receive Success, Enhanced Data Channel
Description
도 1 은 본 발명에 따른 수신성공여부(ACK/NACK) 신호 전송 전력 할당 방법을 나타낸 일실시예 설명도.1 is a diagram illustrating an embodiment of a method for allocating an acknowledgment (ACK / NACK) signal transmission power according to the present invention.
도 2 는 본 발명에 따른 ACK/NACK 신호 전송 전력 할당 방법을 나타낸 다른 실시예 설명도.2 is a diagram illustrating another embodiment of a method for allocating ACK / NACK signal transmission power according to the present invention;
본 발명은 수신성공여부(ACK/NACK) 신호 전송 방법에 관한 것으로써, 더욱 상세하게는, 상향링크 강화 데이터 채널을 통해 패킷을 전송하는 경우에, 기지국(Node-B)이 패킷을 수신하고, 이에 대한 수신성공여부(ACK/NACK) 신호를 전송하는 방법 및 이를 수신한 이동국에서 수신성공여부를 판단하는 방법에 관한 것이다. The present invention relates to a method for transmitting an acknowledgment (ACK / NACK) signal, and more particularly, when a packet is transmitted through an uplink enhanced data channel, a base station (Node-B) receives a packet, The present invention relates to a method of transmitting an acknowledgment grant (ACK / NACK) signal and a method of determining an acknowledgment of grant success in a mobile station receiving the same.
현재 3GPP 상향링크에서는 고속으로 패킷(packet)을 전송하기 위한 채널인 강화 전용 채널(Enhaced-uplink Dedicated Channel; 이하 'E-DCH')에 혼합 자동 재전송 요청(Hybrid Automatic Repeat Request; 이하 'HARQ') 기술을 적용하기 위한 논의를 하고 있다. Currently, in 3GPP uplink, a hybrid automatic repeat request (HARQ) is performed on an enhanced-uplink dedicated channel (E-DCH), which is a channel for transmitting packets at high speed. Discussing the application of the technology.
상향링크에 HARQ를 적용하게 되면, 패킷을 수신한 기지국(Node-B)에서 패킷을 디코딩 한 결과 오류가 있을 경우는 수신실패(이하 'NACK') 신호를, 패킷 수신이 성공한 경우에는 수신성공(이하 'ACK') 신호를 이동국(User Equipment; 이하 'UE')에 전송한다. 상기 수신 성공 여부는 1 비트의 ACK/NACK 채널을 통해 전송된다. NACK 신호를 수신한 UE는 이전에 전송한 패킷을 재전송하며, 기지국은 이전에 수신한 같은 패킷에 대한 디코딩 정보와 재전송된 패킷에 대한 디코딩 정보를 다양한 방식으로 결합하여 재전송 패킷에 대한 수신 성능을 높이게 된다. 이 경우에, ACK/NACK 신호는 하향 링크로 송신되는 1 비트 신호로써, 채널 코딩 등으로 보호되지 않는 경우가 일반적이다. 따라서, UE 에서 이를 성공적으로 수신하도록 하기 위해서는 매우 큰 송신 전력을 필요로 한다. When the HARQ is applied to the uplink, when a packet is decoded by the Node-B receiving the packet, a reception failure (hereinafter referred to as 'NACK') signal is received when there is an error, and when the packet reception is successful, reception ( A 'ACK' signal is transmitted to a user equipment (hereinafter referred to as 'UE'). Whether the reception was successful is transmitted through a 1-bit ACK / NACK channel. Upon receiving the NACK signal, the UE retransmits the previously transmitted packet, and the base station combines decoding information about the same packet previously received and decoding information about the retransmitted packet in various ways to improve reception performance of the retransmitted packet. do. In this case, the ACK / NACK signal is a 1-bit signal transmitted on the downlink and is usually not protected by channel coding or the like. Therefore, very large transmit power is required for the UE to receive it successfully.
또한, HARQ 방식에 있어서, ACK/NACK 신호 중에서 성공적으로 전송되어야 할 필요성이 더 높은 것은 NACK 신호이다. 그 이유는 다음과 같다. UE가 ACK 신호를 NACK 신호로 잘못 수신한 경우에는, Node B에서 이미 성공적으로 수신된 패킷을 재전송하게 되고, 이러한 경우에는 큰 문제가 발생하지 않는다. 그러나, UE가 NACK 신호를 ACK 신호로 잘못 수신한 경우에는, 해당 패킷이 Node B에 성공적으로 전송된 것으로 판단하고, 다음 패킷을 전송하게 된다. 그 결과, 수신 오류가 발생한 패킷은 더이상 물리계층에서 복구되지 못하고, 상위 계층에서 복구를 수행하게 됨으로써 패킷에 대한 전송 지연이 커지게 되므로 문제가 된다. In addition, in the HARQ scheme, the NACK signal having a higher need to be successfully transmitted among the ACK / NACK signals is used. The reason for this is as follows. If the UE incorrectly receives the ACK signal as the NACK signal, the Node B retransmits the packet already successfully received, and in this case, no big problem occurs. However, when the UE incorrectly receives the NACK signal as the ACK signal, it is determined that the packet is successfully transmitted to the Node B, and transmits the next packet. As a result, a packet in which a reception error occurs is no longer recovered at the physical layer, and is recovered because the recovery is performed at a higher layer, thereby causing a problem in that a transmission delay for the packet is increased.
한편, UE가 빠른 속도로 이동하고 있거나 다수의 Node B들과 소프트 핸드오 버 상태에 있을 경우 UE와 Node B 사이의 링크 상태는 매우 열악할 수 있으며 이 경우에는 적절한 수준의 ACK/NACK 수신 성능을 얻기 위한 ACK/NACK 송신 전력(특히 NACK 송신 전력)이 비현실적으로 클 수 있다.On the other hand, when the UE is moving at a high speed or in a soft handover state with a large number of Node Bs, the link state between the UE and Node B may be very poor, and in this case, an appropriate level of ACK / NACK reception performance may be achieved. The ACK / NACK transmit power (especially NACK transmit power) to obtain may be unrealistically large.
이상의 가능성들을 모두 고려하여 상황에 따라서 하향 링크 ACK/NACK 송신 전력을 적절히 설정할 수 있도록 만들 필요가 있지만, 현재 3GPP(3rd Generation Project Partnership) E-DCH 시스템은 아직 설계 중이며, 하향 링크 ACK/NACK 송신 방식은 아직 정해진 바가 없다.Considering all the above possibilities, it is necessary to make downlink ACK / NACK transmission power appropriately set according to the situation, but the 3rd Generation Project Partnership (3GPP) E-DCH system is still being designed, and the downlink ACK / NACK transmission method Is not yet defined.
본 발명은, 상기와 같은 문제점을 해결하기 위하여 제안된 것으로, 상향링크 패킷 전송에 대하여 효율적으로 ACK/NACK 신호를 전송하는 방법 및 수신된 신호의 ACK/NACK 을 판단하는 방법을 제공하는데 그 목적이 있다. The present invention has been proposed to solve the above problems, and provides an method for efficiently transmitting an ACK / NACK signal for uplink packet transmission and a method for determining the ACK / NACK of a received signal. have.
상기의 목적을 달성하기 위한 본 발명은, 상향 링크로 전송되는 패킷에 대한 수신성공여부(ACK/NACK) 신호 전송 방법에 있어서, 이동국으로부터 전송된 패킷을 수신하는 단계와, 상기 패킷을 디코딩 하여, 수신 성공 여부를 판단하는 단계 및 상기 판단 결과에 따라 수신성공(ACK) 신호 혹은 수신실패(NACK) 신호를 전송하되, 상기 수신성공 신호와 수신실패 신호의 송신 전력을 다르게 할당하여 전송하는 단계를 포함하여 이루어진다.In order to achieve the above object, the present invention provides a method for transmitting an acknowledgment (ACK / NACK) signal for a packet transmitted on an uplink, comprising: receiving a packet transmitted from a mobile station, decoding the packet, Determining whether the reception is successful and transmitting an acknowledgment (ACK) signal or a failing signal (NACK) signal according to the determination result, and differently allocating transmission powers of the reception success signal and the reception failure signal. It is done by
또한, 본 발명은 이동국에 있어서, 상향 링크로 전송되는 패킷에 대한 수신성공여부(ACK/NACK) 판단 방법에 있어서, 이동국이 상향 링크로 패킷을 전송하는 단계와, 상기 이동국이 상기 전송한 패킷에 대한 수신성공여부를 판단하되, 수신성공여부(ACK/NACK) 채널을 통해 수신되는 신호가 일정한 기준값 이상을 가지는 경우에는 수신성공(ACK)으로 판단하고, 그 이외에는 수신 실패로 판단하는 단계를 포함하여 이루어진다.The present invention also provides a method for determining an acknowledgment of receipt (ACK / NACK) for a packet transmitted on an uplink in a mobile station, wherein the mobile station transmits the packet on the uplink, and the mobile station transmits the packet to the transmitted packet. Determining whether the reception is successful, if the signal received through the ACK / NACK channel has a predetermined reference value or more, and determines that it is a successful reception (ACK), otherwise it is determined that the reception failure Is done.
한편, 본 발명은 상향 링크로 전송되는 패킷에 대한 수신성공여부(ACK/NACK) 신호 전송 방법에 있어서, 기지국이 상위 계층으로부터 수신성공여부(ACK/NACK) 신호 전송 방법에 대한 정보를 수신하는 단계와, 이동국으로부터 전송된 패킷을 수신하는 단계와, 상기 패킷을 디코딩 하여, 수신 성공 여부를 판단하는 단계 및 상기 판단 결과에 따라 수신성공(ACK) 신호 혹은 수신실패(NACK) 신호를 전송하되, 상기 상위 계층으로부터 수신된 신호 전송 방법을 기초로 전송하는 단계를 포함하여 이루어진다.Meanwhile, the present invention provides a method for transmitting an acknowledgment (ACK / NACK) signal for a packet transmitted on an uplink, the base station receiving information on an acknowledgment (ACK / NACK) signal transmission method from an upper layer. And receiving a packet transmitted from the mobile station, decoding the packet to determine whether the reception is successful, and transmitting an ACK signal or a NACK signal according to the determination result. And transmitting based on the signal transmission method received from the higher layer.
이동국에 있어서, 상향 링크로 전송되는 패킷에 대한 수신성공여부(ACK/NACK) 판단 방법에 있어서, 이동국이 상향 링크로 패킷을 전송하는 단계 및 상기 이동국이 상기 전송한 패킷에 대한 수신성공여부를 판단하되, 기지국으로부터 전송된 기준값 정보를 기초로, 수신성공여부(ACK/NACK) 채널을 통해 수신되는 신호의 전송 전력이 일정한 기준값 이상을 가지는 경우에는 수신성공(ACK)으로 판단하고, 그 이외에는 수신 실패(NACK)로 판단하는 단계를 포함하여 이루어진다.A method for determining an acknowledgment (ACK / NACK) of a packet transmitted on an uplink in a mobile station, the method comprising: transmitting a packet on an uplink by the mobile station and determining whether the mobile station has received an acknowledgment of the transmitted packet However, on the basis of the reference value information transmitted from the base station, if the transmission power of the signal received through the ACK / NACK channel has a predetermined reference value or more, it is determined as a reception success (ACK), otherwise the reception failure And determining (NACK).
상술한 목적, 특징들 및 장점은 첨부된 도면과 관련한 다음의 상세한 설명을 통하여 보다 분명해 질 것이다. 이하 첨부된 도면을 참조하여 본 발명에 따른 바람직한 일실시예를 상세히 설명한다. The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
상향링크의 고속화의 요구에 따라, 무선 이동 통신 시스템에서는 단말기에서 기지국으로 데이터를 송신하는 상향링크에서의 고속 패킷 전송 방식에 대한 논의가 이루어지고 있는데, 그 중에서 강화 전용 채널(Enhanced-uplink Dedicated Channel; 이하 'E-DCH')이 그 대표적 예이다. In accordance with the demand for high-speed uplink, a wireless mobile communication system is discussing a high-speed packet transmission scheme in uplink in which data is transmitted from a terminal to a base station, among which an enhanced-uplink dedicated channel (Enhanced-uplink Dedicated Channel); Hereinafter, 'E-DCH') is a representative example.
이동국(User Equipment; 이하 'UE')은 E-DCH를 통해 고속으로 패킷을 전송하고, 기지국(Node B)은 전송된 패킷을 디코딩 하여 수신 성공 여부를 판단한다. 판단 결과에 따라, 기지국이 물리계층 수신 성공 여부(이하 'ACK/NACK') 신호를 전송함으로써, 빠른 자동 재전송 요구(ARQ; Automatic Repeat Request) 동작을 수행한다. A mobile station (UE) transmits a packet at high speed through the E-DCH, and the base station Node B decodes the transmitted packet to determine whether reception is successful. According to the determination result, the base station transmits a physical layer reception success (hereinafter, 'ACK / NACK') signal, thereby performing a fast automatic repeat request (ARQ) operation.
이 때, 시스템에서 요구되는 수신성공(이하 'ACK') 신호에 대한 수신 품질과 수신실패(이하 'NACK') 신호에 대해 요구되는 수신 품질은 서로 다를 수 있다. 그러므로, ACK/NACK 채널을 통해 ACK 신호를 송신할 때와 NACK 신호를 송신할 때의 송신 전력을 다르게 설정할 필요가 있다. At this time, the reception quality required for the reception success (hereinafter 'ACK') signal required by the system and the reception quality required for the reception failure (hereinafter 'NACK') signal may be different from each other. Therefore, it is necessary to set transmission power differently when transmitting an ACK signal and transmitting a NACK signal through the ACK / NACK channel.
한편, 필요에 따라서는, NACK 신호에 대해서는 송신 전력을 오프(off)시키고(DTX; Discontinuous Transmission), ACK 신호만을 문턱값(threshold)을 통해 검출하도록 하는 것이 효율적일 수 있다. 따라서, 본 발명에서는 기지국이 전송하는 ACK 신호와 NACK 신호의 송신 전력을 다르게 설정할 수 있도록 하고, NACK 신호를 송신하지 않을 수 있도록 하는 ACK/NACK 신호 송신 전력 파라미터를 정의한다.Meanwhile, if necessary, it may be efficient to turn off transmission power (DTX) for the NACK signal and detect only the ACK signal through a threshold. Accordingly, in the present invention, the transmission power of the ACK signal and the NACK signal transmitted by the base station can be set differently, and the ACK / NACK signal transmission power parameter for not transmitting the NACK signal is defined.
ACK/NACK 신호 전송에 있어서, ACK 와 NACK 신호의 전송 전력을 서로 다를 수 있다. 일반적으로, ACK 신호에 오류가 있는 경우보다 NACK 신호의 전송에 오류 가 있을 경우에 보다 큰 문제가 발생하므로, NACK 신호 전송에 있어 더 큰 전력이 요구된다. 따라서, ACK 와 NACK 신호의 송신 전력을 동일하게 하여 전송한다면, NACK 신호에 대해서는 필요한 송신 전력보다 낮은 전력으로 송신되고, ACK 신호에 대해서는 필요한 송신전력 이상으로 높은 전력으로 송신된다. In the ACK / NACK signal transmission, the transmission power of the ACK and NACK signal may be different. In general, a larger problem occurs when there is an error in the transmission of the NACK signal than when there is an error in the ACK signal, so that more power is required for the transmission of the NACK signal. Therefore, if the transmission power of the ACK and the NACK signal are transmitted in the same manner, the transmission power is lower than the transmission power required for the NACK signal, and the transmission power is higher than the transmission power required for the ACK signal.
따라서, ACK/NACK 신호를 전송함에 있어서, ACK 신호를 전송하는 경우와 NACK 신호를 전송하는 경우에 전송 전력을 다르게 설정하면, 보다 효율적으로 ACK/NACK 신호를 전송할 수 있게 된다. Therefore, in transmitting the ACK / NACK signal, if the transmission power is set differently when transmitting the ACK signal and when transmitting the NACK signal, the ACK / NACK signal can be transmitted more efficiently.
도 1 은 본 발명에 따른 ACK/NACK 전송 신호 전력 할당 방법을 나타낸 일실시예 설명도이다. 도 1 을 참조하면, 하향 링크 ACK/NACK 신호의 전송 전력을 다르게 하여 이진 위상 천이 변조(Binery Phase Shift Key; 이하 'BPSK') 방식으로 송신할 수 있다. 1 is a diagram illustrating an embodiment of a method for allocating ACK / NACK transmission signal power according to the present invention. Referring to FIG. 1, a transmission power of a downlink ACK / NACK signal may be changed to be transmitted by a binary phase shift key (hereinafter, referred to as 'BPSK').
UE에서는 하향링크 ACK/NACK 채널을 통해 전송되는 수신 신호가 (+) 전압을 나타낼 경우 ACK 를 수신한 것으로, (-) 전압을 나타낼 경우 NACK 를 수신한 것으로 판단할 수 있다.The UE may determine that an ACK is received when the received signal transmitted through the downlink ACK / NACK channel indicates a positive voltage and that a NACK is received when the negative signal indicates a negative voltage.
도 2 는 본 발명에 따른 ACK/NACK 전송 신호 전력 할당 방법을 나타낸 다른 실시예 설명도이다. 도 2 를 참조하면, 기지국(Node-B) 에서 ACK/NACK 신호를 전송하고자 하는 경우에, 하향 링크의 채널 환경이 열악하여 ACK/NACK 신호 전송을 위한 전력이 부족할 수 있다. 이러한 경우에는, ACK 신호의 전송 성공에 우선하여 NACK 신호의 전송 성공을 보장할 필요가 있다. 2 is a diagram illustrating another embodiment of a method for allocating ACK / NACK transmission signal power according to the present invention. Referring to FIG. 2, when a base station Node-B intends to transmit an ACK / NACK signal, a downlink channel environment may be poor, and thus power for ACK / NACK signal transmission may be insufficient. In such a case, it is necessary to guarantee the successful transmission of the NACK signal prior to the successful transmission of the ACK signal.
상기와 같이, NACK 신호의 전송 성공을 보장하기 위해서, 기지국(Node-B)에 서는 다음과 같이 송신 신호 전력을 할당할 수 있다. 즉, NACK에 대해서는 송신 전력을 오프(off)시키고(DTX), ACK에 대해서는 일정한 전력으로 신호를 전송할 수 있다. 그리고, UE 측에서는 문턱값(threshold)을 이용하여 ACK/NACK를 판정(dection) 할 수 있다. 즉, UE는 하향 링크 ACK/NACK 채널에 대한 수신 신호가 일정 문턱값(threshold)을 넘을 경우 ACK를 수신한 것으로, 넘지 않은 경우는 NACK을 수신한 것으로 판단한다.As described above, in order to ensure the successful transmission of the NACK signal, the base station Node-B can allocate transmit signal power as follows. That is, the transmission power is turned off for the NACK (DTX), and the signal can be transmitted with a constant power for the ACK. In addition, the UE may determine an ACK / NACK using a threshold. That is, the UE determines that an ACK is received when the received signal for the downlink ACK / NACK channel exceeds a predetermined threshold, and when it is not exceeded, the UE receives an NACK.
한편, UE측에서 ACK/NACK 검출을 위한 문턱값(threshold)을 충분히 높게 설정하면, ACK 신호 전송을 위한 전력이 부족한 경우에도, NACK 신호의 전송 성공 확률은 원하는 수준으로 보장할 수 있다. On the other hand, if a threshold for detecting ACK / NACK is set high enough on the UE side, even when power for ACK signal transmission is insufficient, the probability of successful transmission of the NACK signal can be guaranteed to a desired level.
다음은 본 발명에 따라, ACK/NACK 신호의 전송 전력 설정을 효율적으로 설정하기 위한 제 1 실시예이다.The following is a first embodiment for efficiently setting the transmission power setting of the ACK / NACK signal according to the present invention.
일반적으로 각 UE에 대한 하향 링크 전용 채널들의 송신 전력은, 하향 링크 전용 물리 데이터 채널(Dedicated Physical Data Channel; 이하 'DPDCH') 전송 전력에 대한 전력 오프셋(offset) 값으로 정해줄 수 있다. 그러므로, 하향 링크로 ACK/NACK 신호를 전송함에 있어서도, 하향 링크 DPDCH 전송 전력에 대한 전력 오프셋 값을 통해 ACK/NACK 신호 전력을 정해 줄 수 있다. In general, the transmission power of downlink-oriented channels for each UE may be determined as a power offset value for downlink dedicated physical data channel (DPDCH) transmission power. Therefore, even in the transmission of the ACK / NACK signal in the downlink, it is possible to determine the power of the ACK / NACK signal through the power offset value for the downlink DPDCH transmission power.
즉, 무선망 제어기(Radio Network Controller; 이하 'RNC')와 기지국(Node-B) 사이에 ACK/NACK 전송 전력에 대한 파라미터를 각각 지정하여, ACK/NACK 전송전력을 서로 다르게 정해 줄 수 있다. 즉, POACK 를 ACK 신호 전송시의 하향 링크 DPDCH 에 대한 전력 오프셋이라 하고, PONACK 를 NACK 신호 전송시의 하향 링크 DPDCH 에 대한 전력 오프셋이라 하면, RNC 에서 기지국으로 상기 파라미터들을 전달함으로써 ACK/NACK 신호의 송신 전력을 각각 다르게 제어할 수 있다. 예를 들어, NACK 신호를 DTX 시키는 경우에는 PONACK= 0 으로 할 수 있다. That is, the ACK / NACK transmission power may be determined differently by specifying parameters for the ACK / NACK transmission power between the Radio Network Controller (hereinafter, 'RNC') and the base station Node-B. That is, when PO ACK is referred to as a power offset for downlink DPDCH during ACK signal transmission and PO NACK is referred to as a power offset for downlink DPDCH during NACK signal transmission, ACK / NACK is transmitted by transmitting the parameters from RNC to base station. The transmission power of the signal can be controlled differently. For example, PO NACK = 0 may be used when DTXing a NACK signal.
바람직하게는, UE에서 ACK/NACK 수신 시에 BPSK 검출을 할지 문턱값(threshold) 검출을 할지 여부 및 문턱값(threshold) 검출을 하는 경우 적절한 문턱값을 선택할 수 있도록 POACK 및 PONACK 값을 UE 측에도 전달되어야 한다.Preferably, when the ACK / NACK is received by the UE, the PO ACK and PO NACK values are selected so that the BPSK detection or threshold detection and the threshold detection can be selected when the threshold detection is performed. It must also be communicated to the side.
한편, 소프트 핸드오버 상태에 있는 UE 에 대해서 ACK/NACK 신호를 전송함에 있어서는, NACK 신호에 대해서는 항상 DTX 시키도록 할 수 있다. 즉, 소프트 핸드오버 상태에 있는 UE에 대해서는 하향 링크 ACK/NACK 송신 전력을 할당함에 있어서, POACK 는 ACK 송신 시의 하향 링크 DPDCH에 대한 전력 오프셋으로, NACK 송신 전력은 0 (off)로 정의할 수 있다. 바람직하게는, UE측이 ACK/NACK 수신을 위하여 적절한 문턱값(threshold)을 선택할 수 있도록 POACK 값은 UE측에도 전달되어야 한다.On the other hand, when transmitting the ACK / NACK signal to the UE in the soft handover state, it is possible to always DTX the NACK signal. That is, in allocating downlink ACK / NACK transmission power to a UE in soft handover state, PO ACK is a power offset for downlink DPDCH during ACK transmission, and NACK transmission power is defined as 0 (off). Can be. Preferably, the PO ACK value should also be delivered to the UE side so that the UE side can select an appropriate threshold for ACK / NACK reception.
다음은 본 발명에 따라, ACK/NACK 신호의 전송 전력 설정을 효율적으로 설정하기 위한 제 2 실시예이다.The following is a second embodiment for efficiently setting the transmission power setting of the ACK / NACK signal according to the present invention.
RNC에서 각 UE의 소프트 핸드오버 상태 등을 고려하여 Node B로 NACK 신호 송신 전력의 off (DTX) 여부를 알려준다. 예를 들어, 물리 계층은 상위 계층으로부 터 전달 받은 변수(NACK_PW_OFF) 의 값이 1 일 경우에는 NACK 신호 송신전력을 0 으로 하고 변수값이 0 일 경우에는 NACK 신호 송신전력을 RNC에서 정해준 송신전력으로 전송할 수 있다. ACK/NACK 신호의 송신 전력은 RNC로부터 Node B에게 전달된다.The RNC informs Node B whether the NACK signal transmission power is off (DTX) in consideration of a soft handover state of each UE. For example, when the value of the variable (NACK_PW_OFF) received from the upper layer is 1, the NACK signal transmission power is 0, and when the variable value is 0, the NACK signal transmission power is determined by the RNC. Can be sent. The transmit power of the ACK / NACK signal is transferred from the RNC to the Node B.
상기 예에서, NACK 신호 송신 전력이 0 이 아닌 경우에, RNC 에서 정해주는 송신 전력은, 구현을 용이하게 하기 위해, ACK 신호와 NACK 신호의 송신전력이 일치하도록 다음과 같이 하나의 변수를 정의할 수 있다. 즉, ACK/NACK 송신 시의 하향 링크 DPDCH에 대한 전력 오프셋으로서, POACK/NACK 값을 정의할 수 있다. 이 경우에는, UE측이 ACK/NACK 수신을 위하여 적절한 문턱값을 선택할 수 있도록 POACK/NACK 값은 UE 측에도 전달되어야 한다. In the above example, when the NACK signal transmission power is not 0, the transmission power determined by the RNC may be defined as one variable so that the transmission powers of the ACK signal and the NACK signal coincide to facilitate implementation. Can be. That is, the PO ACK / NACK value may be defined as a power offset for the downlink DPDCH during ACK / NACK transmission. In this case, the PO ACK / NACK value should also be delivered to the UE side so that the UE side can select an appropriate threshold for ACK / NACK reception.
한편, 좀 더 효율적인 Node B 전력 사용을 위하여, ACK 신호와 NACK 신호의 송신전력은 다음과 같이 두 개의 독립된 변수로 정의되고 서로 독립적으로 설정될 수 있다. 즉, ACK 송신 시의 하향 링크 DPDCH에 대한 전력 오프셋으로써, POACK 값과, NACK 송신 시의 하향 링크 DPDCH에 대한 전력 오프셋으로써, PONACK 값을 각각 정의할 수 있다. 이 경우에는, UE측이 ACK/NACK 수신을 위하여 적절한 문턱값을 선택할 수 있도록 UE 측에도 상기 POACK 값이 전달되어야 한다.On the other hand, for more efficient Node B power use, the transmission power of the ACK signal and the NACK signal may be defined as two independent variables and set independently of each other as follows. That is, as a power offset for the downlink DPDCH during the ACK transmission, as a power offset for the downlink DPDCH during PO ACK value and, NACK transmission, it is possible to define the NACK value PO, respectively. In this case, the PO ACK value should also be transmitted to the UE side so that the UE side can select an appropriate threshold for ACK / NACK reception.
이상에서 설명한 본 발명은, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 있어 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치 환, 변형 및 변경이 가능하므로 전술한 실시예 및 첨부된 도면에 의해 한정되는 것이 아니다.The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.
본 발명은 하향 링크 ACK/NACK 송신 전력을 각 신호의 수신 품질 요구에 따라 최적화 함으로써 효율적으로 시스템을 운용할 수 있는 효과가 있다. The present invention has an effect that can efficiently operate the system by optimizing the downlink ACK / NACK transmission power according to the reception quality requirements of each signal.
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| PCT/KR2005/002607 WO2006016775A2 (en) | 2004-08-11 | 2005-08-11 | Packet transmission acknowledgement in wireless communication system |
| AU2005272274A AU2005272274B2 (en) | 2004-08-11 | 2005-08-11 | Packet transmission acknowledgement in wireless communication system |
| BRPI0515008-6A BRPI0515008A (en) | 2004-08-11 | 2005-08-11 | transmission packet recognition in a wireless communication system |
| EP05771103A EP1776811B1 (en) | 2004-08-11 | 2005-08-11 | Packet transmission acknowledgement in wireless communication system |
| JP2007525541A JP2008510353A (en) | 2004-08-11 | 2005-08-11 | Packet transmission approval method in wireless communication system |
| RU2007108492/09A RU2404516C2 (en) | 2004-08-11 | 2005-08-11 | Packet transmission acknowledgment in wireless communication system |
| CN2005800270457A CN101002440B (en) | 2004-08-11 | 2005-08-11 | Packet transmission acknowledgement in wireless communication system |
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| US5553075A (en) * | 1994-06-22 | 1996-09-03 | Ericsson Ge Mobile Communications Inc. | Packet data protocol for wireless communication |
| DE19734935A1 (en) * | 1997-08-12 | 1999-03-04 | Siemens Ag | Method, mobile station and base station for packet-oriented transmission of information |
| US6574211B2 (en) * | 1997-11-03 | 2003-06-03 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
| JP3545682B2 (en) * | 2000-07-04 | 2004-07-21 | 松下電器産業株式会社 | High-speed packet transmission system |
| KR100850940B1 (en) * | 2001-03-26 | 2008-08-08 | 엘지전자 주식회사 | How to Determine Initial Transmit Power for an Access Channel |
| ATE309652T1 (en) * | 2001-11-16 | 2005-11-15 | Matsushita Electric Ind Co Ltd | ARQ RETRANSMISSION METHOD WITH INCREMENTAL REDUNDANCY USING BIT REORDERING TYPES |
| KR100850989B1 (en) * | 2002-01-05 | 2008-08-12 | 엘지전자 주식회사 | A method for controlling power for response signals ACK or NACK in an ARQ system |
| KR100965861B1 (en) * | 2002-10-24 | 2010-06-24 | 삼성전자주식회사 | Complex retransmission control device in mobile communication system |
-
2004
- 2004-12-24 KR KR1020040112242A patent/KR101122079B1/en not_active Expired - Fee Related
-
2005
- 2005-08-11 RU RU2007108492/09A patent/RU2404516C2/en not_active IP Right Cessation
- 2005-08-11 CN CN2005800270457A patent/CN101002440B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100953567B1 (en) * | 2006-12-05 | 2010-04-21 | 한국전자통신연구원 | Acknowledgment signal transmission and reception apparatus and method in mobile communication system |
| US8149769B2 (en) | 2006-12-05 | 2012-04-03 | Electronics And Telecommunications Research Institute | Apparatus and method of transmitting and receiving reception acknowledgment signal in mobile communication system |
| KR101277421B1 (en) * | 2007-06-19 | 2013-06-20 | 엘지전자 주식회사 | Method of Transmitting ACK/NACK Message in Multiple Antenna System |
| WO2011155754A3 (en) * | 2010-06-07 | 2012-02-16 | 엘지전자 주식회사 | Method and apparatus for transmitting a response signal |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2404516C2 (en) | 2010-11-20 |
| RU2007108492A (en) | 2008-09-20 |
| CN101002440A (en) | 2007-07-18 |
| KR101122079B1 (en) | 2012-03-15 |
| CN101002440B (en) | 2010-10-06 |
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