CN101964704A - Hybrid automatic retransmission request communication method, device and communication system - Google Patents

Hybrid automatic retransmission request communication method, device and communication system Download PDF

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CN101964704A
CN101964704A CN2009101601739A CN200910160173A CN101964704A CN 101964704 A CN101964704 A CN 101964704A CN 2009101601739 A CN2009101601739 A CN 2009101601739A CN 200910160173 A CN200910160173 A CN 200910160173A CN 101964704 A CN101964704 A CN 101964704A
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harq
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CN101964704B (en
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杜高科
吕永霞
陈小波
万蕾
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Huawei Technologies Co Ltd
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Abstract

本发明公开了一种混合自动重传请求通信方法、装置与通信系统,其中,方法包括:接收第一混合自动重传请求HARQ消息;根据聚合载波中可用于发送第二HARQ消息的N个成员载波的第一HARQ消息与第二HARQ消息之间的时延,选择时延最小的成员载波,N为大于1的整数;其中,第一HARQ消息为当前数据,第二HARQ消息为确认应答消息或否定应答消息ACK/NACK消息,或者,第一HARQ消息为ACK/NACK消息,第二HARQ消息为与该ACK/NACK消息对应的上一个数据或该上一个数据的下一个数据;利用时延最小的成员载波发送第二HARQ消息。本发明实施例可以减少HARQ RTT,满足实时业务需求。

Figure 200910160173

The present invention discloses a hybrid automatic repeat request communication method, device and communication system, wherein the method includes: receiving a first hybrid automatic repeat request HARQ message; For the delay between the first HARQ message and the second HARQ message of the carrier, select the component carrier with the smallest delay, and N is an integer greater than 1; wherein, the first HARQ message is the current data, and the second HARQ message is an acknowledgment response message Or a negative acknowledgment message ACK/NACK message, or, the first HARQ message is an ACK/NACK message, and the second HARQ message is the previous data corresponding to the ACK/NACK message or the next data of the previous data; using the time delay The smallest component carrier sends the second HARQ message. The embodiment of the present invention can reduce HARQ RTT and meet real-time service requirements.

Figure 200910160173

Description

混合自动重传请求通信方法、装置与通信系统 Hybrid automatic repeat request communication method, device and communication system

技术领域technical field

本发明涉及通信技术,尤其是一种混合自动重传请求通信方法、装置与通信系统。The present invention relates to communication technology, in particular to a hybrid automatic repeat request communication method, device and communication system.

背景技术Background technique

在第三代合作伙伴计划(3rd Generation Partnership Project,以下简称:3GPP)演进全球地面无线接入(Evolved Universal Terrestrial Radio Access,以下简称:E-UTRA)系统中,数据的发送与接收支持物理层混合自动重传请求(Hybrid Automatic Repeat Request,以下简称:HARQ)技术,从而可以降低数据传输时延和获取更高的数据传输速率。在HARQ技术中,数据接收方需要向数据发送方反馈确认应答(Acknowledgement,以下简称:ACK)消息或否定应答(Negative-acknowledgement,以下简称:NACK)消息,即:ACK/NACK消息来告知数据发送方是否正确接收其发送的数据。其中,反馈ACK消息表示数据接收方正确接收到数据发送方发送的数据,反馈NACK消息表示数据接收方未正确接收到数据发送方发送的数据,或者接收数据错误。In the 3rd Generation Partnership Project ( 3rd Generation Partnership Project, hereinafter referred to as: 3GPP) Evolved Universal Terrestrial Radio Access (hereinafter referred to as: E-UTRA) system, data transmission and reception support the physical layer A hybrid automatic repeat request (Hybrid Automatic Repeat Request, hereinafter referred to as: HARQ) technology can reduce data transmission delay and obtain a higher data transmission rate. In HARQ technology, the data receiver needs to feed back an acknowledgment (Acknowledgment, hereinafter referred to as: ACK) message or a negative acknowledgment (Negative-acknowledgement, hereinafter referred to as: NACK) message to the data sender, namely: ACK/NACK message to inform the data transmission Whether the party receives the data it sends correctly. Wherein, the feedback ACK message indicates that the data receiver correctly received the data sent by the data sender, and the feedback NACK message indicates that the data receiver did not correctly receive the data sent by the data sender, or the received data was wrong.

在3GPP E-UTRA系统中,下行链路数据传输的HARQ过程如下:基站为用户设备(User Equipment,以下简称:UE)分配物理下行共享信道(PhysicalDownlink Shared Channel,以下简称:PDSCH)和物理上行ACK信道,并在分配的PDSCH上向UE发送数据;UE在分配的PDSCH上接收基站发送的数据,并根据是否正确接收该数据相应生成ACK消息或NACK消息,然后在分配的物理上行ACK信道上向基站反馈生成的ACK/NACK消息;基站接收UE反馈的ACK/NACK消息,若基站接收到的是NACK消息且向UE发送上述数据的次数没有达到预先设置的最大重传次数,则按照上述过程重新向UE发送该数据,否则,若基站接收到的是ACK消息或者接收到的是NACK消息但向UE发送上述数据的次数已经达到预先设置的最大重传次数,则按照上述过程向UE发送下一个数据。上行链路数据传输的HARQ过程如下:基站为UE分配物理上行共享信道(Physical Uplink Shared Channel,以下简称:PUSCH)和物理下行ACK信道;UE在基站分配的PUSCH上向基站发送数据;基站在向UE分配的PUSCH上接收UE发送的数据、并根据是否正确接收该数据相应生成ACK消息或NACK消息,然后在分配的物理下行ACK信道上向UE反馈生成的ACK/NACK消息;UE接收基站反馈的ACK/NACK消息,若UE接收到的是NACK消息且发送上述数据的次数没有达到预先设置的最大重传次数,则按照上述过程重新向基站发送该数据,否则,若UE接收到的是ACK消息或者接收到的是NACK消息但向基站发送上述数据的次数已经达到预先设置的最大重传次数,则按照上述过程向基站发送下一个数据。In the 3GPP E-UTRA system, the HARQ process of downlink data transmission is as follows: the base station allocates a physical downlink shared channel (Physical Downlink Shared Channel, hereinafter referred to as: PDSCH) and a physical uplink ACK to the user equipment (User Equipment, hereinafter referred to as: UE) channel, and send data to the UE on the allocated PDSCH; the UE receives the data sent by the base station on the allocated PDSCH, and generates an ACK message or NACK message according to whether the data is received correctly, and then transmits data to the UE on the allocated physical uplink ACK channel The base station feeds back the generated ACK/NACK message; the base station receives the ACK/NACK message fed back by the UE. If the base station receives a NACK message and the number of times the above data is sent to the UE does not reach the preset maximum number of retransmissions, it will follow the above process to retransmit Send the data to the UE, otherwise, if the base station receives an ACK message or a NACK message but the number of times the above data has been sent to the UE has reached the preset maximum number of retransmissions, it will send the next one to the UE according to the above process data. The HARQ process of uplink data transmission is as follows: the base station allocates a physical uplink shared channel (Physical Uplink Shared Channel, hereinafter referred to as: PUSCH) and a physical downlink ACK channel for the UE; the UE sends data to the base station on the PUSCH allocated by the base station; Receive the data sent by the UE on the PUSCH allocated by the UE, and generate an ACK message or NACK message according to whether the data is received correctly, and then feed back the generated ACK/NACK message to the UE on the allocated physical downlink ACK channel; the UE receives the ACK/NACK message fed back by the base station ACK/NACK message, if the UE receives a NACK message and the number of times the above data is sent does not reach the preset maximum number of retransmissions, it will resend the data to the base station according to the above process, otherwise, if the UE receives an ACK message Or if a NACK message is received but the number of times the above data is sent to the base station has reached the preset maximum number of retransmissions, then the next data is sent to the base station according to the above process.

数据传输的HARQ过程中,通常情况下,接收当前数据到反馈ACK/NACK信息之间具有一个固定时延,记为

Figure B2009101601739D0000021
接收ACK/NACK消息到重新发送当前数据或发送下一个数据之间也具有一个固定时延,记为
Figure B2009101601739D0000022
在3GPPE-UTRA频分双工(Frequency Division Duplex,以下简称:FDD)系统中,
Figure B2009101601739D0000023
在3GPP E-UTRA时分双工(Time Division Duplex,以下简称:TDD)系统中,对于下行链路数据传输而言,反馈ACK/NACK消息的时刻是距离接收当前数据时刻不小于4ms的最近的上行子帧时刻,即:
Figure B2009101601739D0000024
为接收当前数据时刻到该最近的上行子帧时刻之间的时间间隔;重新发送当前数据或发送下一个数据的时刻是距离接收ACK/NACK消息时刻不小于4ms的最近的下行子帧时刻,即:
Figure B2009101601739D0000025
为接收ACK/NACK消息时刻到该最近的下行子帧时刻之间的时间间隔。对于上行链路数据传输而言,反馈ACK/NACK消息的时刻是距离接收当前数据时刻不小于4ms的最近的下行子帧时刻,即:
Figure B2009101601739D0000026
为接收当前数据时刻到该最近的下行子帧时刻之间的时间间隔。重新发送当前数据或发送下一个数据的时刻是距离接收ACK/NACK消息时刻不小于4ms的最近的上行子帧时刻,即:
Figure B2009101601739D0000031
为接收ACK/NACK消息时刻到该最近的上行子帧时刻之间的时间间隔。其中,
Figure B2009101601739D0000033
通常由不同上、下行子帧配比下的HARQ定时关系给出。In the HARQ process of data transmission, usually, there is a fixed delay between receiving the current data and feeding back ACK/NACK information, which is denoted as
Figure B2009101601739D0000021
There is also a fixed delay between receiving the ACK/NACK message and resending the current data or sending the next data, denoted as
Figure B2009101601739D0000022
In the 3GPPE-UTRA frequency division duplex (Frequency Division Duplex, hereinafter referred to as: FDD) system,
Figure B2009101601739D0000023
In the 3GPP E-UTRA time division duplex (Time Division Duplex, hereinafter referred to as: TDD) system, for the downlink data transmission, the time to feed back the ACK/NACK message is the nearest uplink time not less than 4ms away from the moment when the current data is received. Subframe time, namely:
Figure B2009101601739D0000024
is the time interval between the moment of receiving the current data and the moment of the nearest uplink subframe; the moment of resending the current data or sending the next data is the moment of the nearest downlink subframe not less than 4ms away from the moment of receiving the ACK/NACK message, that is :
Figure B2009101601739D0000025
is the time interval between the moment of receiving the ACK/NACK message and the moment of the latest downlink subframe. For uplink data transmission, the time to feed back the ACK/NACK message is the nearest downlink subframe time not less than 4ms away from the time when the current data is received, namely:
Figure B2009101601739D0000026
is the time interval between the moment of receiving the current data and the moment of the latest downlink subframe. The time to resend the current data or send the next data is the nearest uplink subframe time not less than 4ms from the time of receiving the ACK/NACK message, that is:
Figure B2009101601739D0000031
is the time interval between the moment of receiving the ACK/NACK message and the moment of the latest uplink subframe. in, and
Figure B2009101601739D0000033
It is usually given by the HARQ timing relationship under different uplink and downlink subframe configurations.

3GPP E-UTRA系统通常也称为长期演进(Long Term Evolve,以下简称:LTE)系统,作为LTE系统的进一步演进和增强系统,高级长期演进(Long TermEvolution-Advanced,以下简称:LTE-A)系统中,引入了载波聚合(CarrierAggregation)技术,也称为频谱聚合(Spectrum Aggregation)技术,或者带宽扩展(Bandwidth Extension)技术,将两个或更多的成员载波(ComponentCarrier)的频谱被聚合在一起,以支持更宽的传输带宽,满足国际电信联盟对于第四代通信技术的峰值数据速率要求。其中,频谱被聚合在一起的所有成员载波构成聚合载波。在载波聚合中,各成员载波的频谱可以是相邻的连续频谱,也可以是同一频带内的不相邻频谱,还可以是不同频带内的不连续频谱。载波聚合中的每个成员载波具有独立的HARQ过程,LTE-A系统中,UE根据其能力和业务需求,可以选择接入一个成员载波或同时接入多个成员载波进行数据收发,并且UE可以选择不同数量的上行和下行成员载波。The 3GPP E-UTRA system is also commonly referred to as the Long Term Evolve (hereinafter referred to as: LTE) system. As a further evolution and enhancement system of the LTE system, the Long Term Evolution-Advanced (hereinafter referred to as: LTE-A) system In , the carrier aggregation (CarrierAggregation) technology is introduced, also known as the spectrum aggregation (Spectrum Aggregation) technology, or the bandwidth extension (Bandwidth Extension) technology, which aggregates the spectrum of two or more component carriers (ComponentCarrier) together, In order to support a wider transmission bandwidth, it meets the peak data rate requirements of the International Telecommunication Union for the fourth generation communication technology. Wherein, all component carriers whose frequency spectrums are aggregated form an aggregated carrier. In carrier aggregation, the frequency spectrum of each component carrier may be adjacent continuous frequency spectrum, non-adjacent frequency spectrum in the same frequency band, or discontinuous frequency spectrum in different frequency bands. Each component carrier in carrier aggregation has an independent HARQ process. In the LTE-A system, the UE can choose to access one component carrier or access multiple component carriers for data transmission and reception according to its capabilities and service requirements, and the UE can Different numbers of uplink and downlink component carriers are selected.

在LTE-A TDD系统中,当采用不同频带内的不连续频谱进行载波聚合时,为了避免不同频带内的上、下行成员载波之间相互干扰,需要在不同频带内的成员载波上分别设置不同的上、下行子帧配比。在实现本发明的过程中,发明人发现,现有的LTE-A TDD系统中,在不同频带内的成员载波的上、下行子帧配比不同时,时延

Figure B2009101601739D0000034
Figure B2009101601739D0000035
也可能不同,而现有技术无法选择反馈ACK/NACK消息、重新发送当前数据或发送下一个数据的成员载波,因此无法控制HARQ过程所需要的往返时延(Round Trip Time,以下简称:RTT),也称为:HARQ RTT,从而无法满足实时业务需求。In the LTE-A TDD system, when discontinuous spectrum in different frequency bands is used for carrier aggregation, in order to avoid mutual interference between uplink and downlink component carriers in different frequency bands, it is necessary to set different The ratio of uplink and downlink subframes. In the process of realizing the present invention, the inventor found that in the existing LTE-A TDD system, when the uplink and downlink subframe ratios of component carriers in different frequency bands are different, the time delay
Figure B2009101601739D0000034
and
Figure B2009101601739D0000035
It may also be different, but the existing technology cannot select the component carrier that feeds back the ACK/NACK message, resends the current data, or sends the next data, so it cannot control the round trip delay (Round Trip Time, hereinafter referred to as: RTT) required by the HARQ process , also known as: HARQ RTT, which cannot meet real-time service requirements.

发明内容Contents of the invention

本发明实施例提供一种混合自动重传请求通信方法、装置与通信系统,减少HARQ RTT,以满足实时业务需求。Embodiments of the present invention provide a hybrid automatic repeat request communication method, device and communication system, reducing HARQ RTT to meet real-time service requirements.

本发明实施例提供的一种混合自动重传请求通信方法,包括:A hybrid automatic repeat request communication method provided by an embodiment of the present invention includes:

接收第一混合自动重传请求HARQ消息;receiving a first hybrid automatic repeat request HARQ message;

根据聚合载波中可用于发送第二HARQ消息的N个成员载波的第一HARQ消息与第二HARQ消息之间的时延,从可用于发送第二HARQ消息的N个成员载波中选择时延最小的成员载波,N为大于1的整数;其中,所述第一HARQ消息为当前数据,所述第二HARQ消息为确认应答消息或否定应答消息ACK/NACK消息,或者,所述第一HARQ消息为ACK/NACK消息,所述第二HARQ消息为与该ACK/NACK消息对应的上一个数据或该上一个数据的下一个数据;According to the delay between the first HARQ message and the second HARQ message of the N component carriers that can be used to send the second HARQ message in the aggregated carrier, select the minimum delay from the N component carriers that can be used to send the second HARQ message component carrier, N is an integer greater than 1; wherein, the first HARQ message is current data, the second HARQ message is an acknowledgment message or a negative acknowledgment message ACK/NACK message, or the first HARQ message It is an ACK/NACK message, and the second HARQ message is the previous data corresponding to the ACK/NACK message or the next data of the previous data;

利用所述时延最小的成员载波发送第二HARQ消息。Send the second HARQ message by using the component carrier with the smallest delay.

本发明实施例提供的一种混合自动重传请求通信装置,包括:A hybrid automatic repeat request communication device provided by an embodiment of the present invention includes:

接收模块,用于接收第一HARQ消息;a receiving module, configured to receive a first HARQ message;

选择模块,用于根据聚合载波中可用于发送第二HARQ消息的N个成员载波的第一HARQ消息与第二HARQ消息之间的时延,从可用于发送第二HARQ消息的N个成员载波中选择时延最小的成员载波;其中,所述第一HARQ消息为当前数据,所述第二HARQ消息为ACK/NACK消息,或者,所述第一HARQ消息为ACK/NACK消息,所述第二HARQ消息为与该ACK/NACK消息对应的上一个数据或该上一个数据的下一个数据;The selection module is configured to select from the N component carriers that can be used to send the second HARQ message according to the time delay between the first HARQ message and the second HARQ message of the N component carriers that can be used to send the second HARQ message in the aggregated carrier Select the component carrier with the smallest delay; wherein, the first HARQ message is current data, and the second HARQ message is an ACK/NACK message, or, the first HARQ message is an ACK/NACK message, and the second HARQ message is an ACK/NACK message, and the second The second HARQ message is the previous data corresponding to the ACK/NACK message or the next data of the previous data;

发送模块,用于利用所述时延最小的成员载波发送第二HARQ消息。A sending module, configured to send a second HARQ message by using the component carrier with the smallest delay.

本发明实施例提供的一种用户终端,包括如本发明上述实施例提供的混合自动重传请求通信装置。A user terminal provided by an embodiment of the present invention includes the HARQ communication device provided in the foregoing embodiments of the present invention.

本发明实施例提供的一种基站,包括如本发明上述实施例提供的混合自动重传请求通信装置。A base station provided by an embodiment of the present invention includes the HARQ communication device provided in the foregoing embodiments of the present invention.

本发明实施例提供的一种通信系统,用户终端与基站,所述用户终端和/或所述基站中包括如本发明上述实施例提供的混合自动重传请求通信装置。A communication system provided by an embodiment of the present invention includes a user terminal and a base station, and the user terminal and/or the base station includes the HARQ communication device provided in the above-mentioned embodiments of the present invention.

基于本发明上述实施例提供的混合自动重传请求通信方法、装置与通信系统,在HARQ过程中,当聚合载波中不同成员载波具有不同的上、下行子帧配比时,UE或基站在接收到第一HARQ消息后,选择第一HARQ消息与第二HARQ消息之间的时延最小的成员载波来发送第二HARQ消息,从而有效减少HARQ RTT,满足实时业务需求。Based on the hybrid automatic repeat request communication method, device, and communication system provided by the above-mentioned embodiments of the present invention, in the HARQ process, when different component carriers in the aggregated carrier have different uplink and downlink subframe ratios, the UE or the base station is receiving After receiving the first HARQ message, select the component carrier with the smallest delay between the first HARQ message and the second HARQ message to send the second HARQ message, thereby effectively reducing the HARQ RTT and meeting real-time service requirements.

下面通过附图和实施例,对本发明的技术方案做进一步的详细描述。The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

附图说明Description of drawings

为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

图1为本发明HARQ通信方法一个实施例的流程图;Fig. 1 is the flowchart of an embodiment of the HARQ communication method of the present invention;

图2为10DL∶0UL和0DL∶10UL的上、下行子帧配比的两个成员载波的无线帧结构示意图;FIG. 2 is a schematic diagram of the wireless frame structure of two component carriers with uplink and downlink subframe ratios of 10DL:0UL and 0DL:10UL;

图3为本发明HARQ通信方法另一个实施例的流程图;FIG. 3 is a flowchart of another embodiment of the HARQ communication method of the present invention;

图4为两个成员载波的一个无线帧结构示意图;FIG. 4 is a schematic diagram of a radio frame structure of two component carriers;

图5为本发明相对定时关系调整后的一个无线帧结构示意图;FIG. 5 is a schematic diagram of a wireless frame structure after the relative timing relationship is adjusted in the present invention;

图6为本发明相对定时关系调整后的另一个无线帧结构示意图;6 is a schematic diagram of another wireless frame structure after the relative timing relationship is adjusted in the present invention;

图7为基于图4所示的帧结构发送HARQ消息的一个时刻示意图;FIG. 7 is a schematic diagram of a moment for sending a HARQ message based on the frame structure shown in FIG. 4;

图8为本发明HARQ通信装置一个实施例的结构示意图;FIG. 8 is a schematic structural diagram of an embodiment of a HARQ communication device according to the present invention;

图9为本发明HARQ通信装置另一个实施例的结构示意图;FIG. 9 is a schematic structural diagram of another embodiment of a HARQ communication device according to the present invention;

图10为本发明HARQ通信装置又一个实施例的结构示意图;FIG. 10 is a schematic structural diagram of another embodiment of a HARQ communication device according to the present invention;

图11为本发明HARQ通信装置再一个实施例的结构示意图。FIG. 11 is a schematic structural diagram of another embodiment of a HARQ communication device according to the present invention.

具体实施方式Detailed ways

下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

图1为本发明HARQ通信方法一个实施例的流程图。如图1所示,该实施例的HARQ通信方法包括:FIG. 1 is a flowchart of an embodiment of the HARQ communication method of the present invention. As shown in Figure 1, the HARQ communication method of this embodiment includes:

步骤101,接收第一混合自动重传请求HARQ消息。Step 101, receiving a first Hybrid Automatic Repeat Request (HARQ) message.

步骤102,根据聚合载波中可用于发送第二HARQ消息的N个成员载波的第一HARQ消息与第二HARQ消息之间的时延,从可用于发送第二HARQ消息的N个成员载波中选择时延最小的成员载波。其中,N为大于1的整数。Step 102, according to the time delay between the first HARQ message and the second HARQ message of the N component carriers that can be used to send the second HARQ message in the aggregated carrier, select from the N component carriers that can be used to send the second HARQ message The component carrier with the smallest delay. Wherein, N is an integer greater than 1.

第一HARQ消息为当前数据,相应的,第二HARQ消息为ACK/NACK消息;或者,第一HARQ消息为ACK/NACK消息,第二HARQ消息为与该ACK/NACK消息对应的上一个数据或该上一个数据的下一个数据。The first HARQ message is the current data, and correspondingly, the second HARQ message is an ACK/NACK message; or, the first HARQ message is an ACK/NACK message, and the second HARQ message is the previous data corresponding to the ACK/NACK message or The next data of the previous data.

步骤103,利用时延最小的成员载波发送第二HARQ消息。Step 103: Send a second HARQ message by using the component carrier with the smallest delay.

基于本发明上述实施例提供的HARQ通信方法,当聚合载波中不同成员载波具有不同的上、下行子帧配比时,UE或基站在接收到第一HARQ消息后,可以选择第一HARQ消息与第二HARQ消息之间的时延最小的成员载波来发送第二HARQ消息,从而有效减少TDD通信系统,包括LTETDD通信系统与LTE-A TDD通信系统中的HARQ RTT,满足实时业务需求。Based on the HARQ communication method provided by the above embodiments of the present invention, when different component carriers in the aggregated carrier have different uplink and downlink subframe configurations, after receiving the first HARQ message, the UE or the base station can select the first HARQ message and The component carrier with the smallest delay between the second HARQ messages sends the second HARQ message, thereby effectively reducing the HARQ RTT in the TDD communication system, including the LTE TDD communication system and the LTE-A TDD communication system, to meet real-time service requirements.

根据本发明的一个具体实施例,上述HARQ通信方法实施例中,步骤101具体可以是:UE接收基站通过PDSCH发送的当前数据。相应的,步骤102中,第一HARQ消息与第二HARQ消息之间的时延具体为:距离接收第一HARQ消息的时刻不小于第一预设常数时间T0的最近的上行时刻;步骤103中,发送第二HARQ消息具体为:通过物理上行ACK信道向基站发送ACK/NACK消息。According to a specific embodiment of the present invention, in the above-mentioned embodiment of the HARQ communication method, step 101 may specifically be: the UE receives current data sent by the base station through the PDSCH. Correspondingly, in step 102, the time delay between the first HARQ message and the second HARQ message is specifically: the nearest uplink moment from the time when the first HARQ message is received is not less than the first preset constant time T0; in step 103 Specifically, sending the second HARQ message is: sending an ACK/NACK message to the base station through a physical uplink ACK channel.

根据本发明的另一个具体实施例,上述HARQ通信方法实施例中,步骤101具体可以是:基站接收UE通过PUSCH发送的当前数据。相应的,步骤102中,第一HARQ消息与第二HARQ消息之间的时延具体为:距离接收第一HARQ消息的时刻不小于第一预设常数时间T0的最近的下行时刻;步骤103中,发送第二HARQ消息具体为:通过物理下行ACK信道向UE发送ACK/NACK消息。According to another specific embodiment of the present invention, in the above embodiment of the HARQ communication method, step 101 may specifically be: the base station receives the current data sent by the UE through the PUSCH. Correspondingly, in step 102, the time delay between the first HARQ message and the second HARQ message is specifically: the nearest downlink moment when the first HARQ message is received is not less than the first preset constant time T0; in step 103 Specifically, sending the second HARQ message is: sending an ACK/NACK message to the UE through a physical downlink ACK channel.

根据本发明的又一个具体实施例,上述HARQ通信方法实施例中,步骤101具体可以是:UE接收基站通过物理下行ACK信道发送的ACK/NACK消息。相应的,步骤102中,第一HARQ消息与第二HARQ消息之间的时延具体为:距离接收ACK/NACK消息的时刻不小于第二预设常数时间T1的最近的上行时刻;步骤103中,发送第二HARQ消息具体为:通过PUSCH向基站发送与接收到的ACK/NACK消息对应的上一个数据或该上一个数据的下一个数据。According to another specific embodiment of the present invention, in the above-mentioned embodiment of the HARQ communication method, step 101 may be specifically: the UE receives the ACK/NACK message sent by the base station through the physical downlink ACK channel. Correspondingly, in step 102, the time delay between the first HARQ message and the second HARQ message is specifically: the nearest uplink moment from the time when the ACK/NACK message is received is not less than the second preset constant time T1; in step 103 The sending of the second HARQ message specifically includes: sending the previous data corresponding to the received ACK/NACK message or the next data of the previous data to the base station through the PUSCH.

根据本发明的再一个具体实施例,上述HARQ通信方法实施例中,步骤101具体可以是:基站接收UE通过物理上行ACK信道发送的ACK/NACK消息。相应的,步骤102中,第一HARQ消息与第二HARQ消息之间的时延具体为:距离接收ACK/NACK消息的时刻不小于第二预设常数时间的最近的下行时刻;步骤103中,发送第二HARQ消息具体为:通过PDSCH向UE发送与接收到的ACK/NACK消息对应的上一个数据或该上一个数据的下一个数据。According to yet another specific embodiment of the present invention, in the above-mentioned embodiment of the HARQ communication method, step 101 may specifically be: the base station receives the ACK/NACK message sent by the UE through the physical uplink ACK channel. Correspondingly, in step 102, the time delay between the first HARQ message and the second HARQ message is specifically: the nearest downlink moment from the time when the ACK/NACK message is received is not less than the second preset constant time; in step 103, Sending the second HARQ message specifically includes: sending the previous data corresponding to the received ACK/NACK message or the next data of the previous data to the UE through the PDSCH.

本发明各实施例的HARQ通信方法,可以应用于UE中进行的HARQ过程,也可以应用于基站中进行的HARQ过程。当第一HARQ消息为当前数据时,对应于UE和基站,该当前数据分别通过PDSCH/PUSCH传输,假设UE和基站分别在时刻n通过PDSCH/PUSCH接收到该当前数据,相应通过选择出的时延最小的第i0成员载波,反馈作为第二HARQ消息的ACK/NACK消息的时刻为

Figure B2009101601739D0000081
Figure B2009101601739D0000083
其中,对于通过PDSCH传输当前数据而言,表示第i个成员载波距离时刻n不小于一个预设常数时间T0的最近的上行时刻;对于通过PUSCH传输当前数据而言,表示第i个成员载波距离时刻n不小于一个预设常数时间T0的最近的下行时刻。在LTE-A系统中,上行时刻或下行时刻以子帧为单位,其中子帧的长度为1ms,因此,上行时刻指上行子帧时刻,下行时刻指下行子帧时刻,预设常数时间T0=4ms,即:4个子帧长。The HARQ communication method in each embodiment of the present invention can be applied to the HARQ process performed in the UE, and can also be applied to the HARQ process performed in the base station. When the first HARQ message is the current data, corresponding to the UE and the base station, the current data is transmitted through the PDSCH/PUSCH respectively, assuming that the UE and the base station respectively receive the current data through the PDSCH/PUSCH at time n, correspondingly through the selected time The i0th component carrier with the smallest delay, the time to feed back the ACK/NACK message as the second HARQ message is
Figure B2009101601739D0000081
but
Figure B2009101601739D0000083
Among them, for transmitting current data through PDSCH, Indicates the nearest uplink moment at which the i-th component carrier is not less than a preset constant time T0 from time n; for current data transmission via PUSCH, Indicates the nearest downlink moment at which the i-th component carrier is not less than a preset constant time T0 from time n. In the LTE-A system, the uplink time or downlink time is in units of subframes, and the length of a subframe is 1 ms. Therefore, the uplink time refers to the uplink subframe time, and the downlink time refers to the downlink subframe time. The preset constant time T0= 4ms, that is: 4 subframes long.

进一步地,在时刻

Figure B2009101601739D0000086
接收到ACK/NACK消息后,可以根据是否满足预设重传条件,在时刻
Figure B2009101601739D0000087
通过选择出的时延最小的第i1成员载波发送ACK/NACK消息对应的上一个数据或发送下一个数据,即:传送新的数据。其中,
Figure B2009101601739D0000088
Figure B2009101601739D0000089
对于通过物理上行ACK信道传输ACK/NACK消息而言,表示第i个成员载波距离时刻
Figure B2009101601739D00000811
不小于预设常数时间T1的最近的上行时刻;对于通过物理下行ACK信道传输ACK/NACK消息而言,
Figure B2009101601739D00000812
表示第i个成员载波距离时刻
Figure B2009101601739D00000813
不小于预设常数时间T1的最近的下行时刻。Further, at the moment
Figure B2009101601739D0000086
After receiving the ACK/NACK message, according to whether the preset retransmission condition is met, at time
Figure B2009101601739D0000087
The last data corresponding to the ACK/NACK message or the next data is sent through the i1th component carrier selected with the smallest delay, that is, new data is transmitted. in,
Figure B2009101601739D0000088
Figure B2009101601739D0000089
For the transmission of ACK/NACK messages through the physical uplink ACK channel, Indicates the i-th component carrier distance from time instant
Figure B2009101601739D00000811
The latest uplink moment not less than the preset constant time T1; for the transmission of ACK/NACK messages through the physical downlink ACK channel,
Figure B2009101601739D00000812
Indicates the i-th component carrier distance from time instant
Figure B2009101601739D00000813
The latest downlink moment not less than the preset constant time T1.

另外,在本发明上述实施例的HARQ通信方法的步骤102中,可以直接比较预先获取并存储的N个成员载波的第一HARQ消息与第二HARQ消息之间的时延,来选择时延最小的成员载波。或者,也可以在步骤102之前,分别获取预先设置的N个成员载波的上、下行子帧配比下的HARQ定时关系,并根据N个成员载波的HARQ定时关系,来即时获取N个成员载波的第一HARQ消息与第二HARQ消息之间的时延。In addition, in step 102 of the HARQ communication method in the above-mentioned embodiment of the present invention, the time delay between the first HARQ message and the second HARQ message of the N component carriers acquired and stored in advance can be directly compared to select component carrier. Alternatively, before step 102, the preset HARQ timing relationships under the uplink and downlink subframe ratios of the N component carriers can be acquired respectively, and the N component carriers can be acquired immediately according to the HARQ timing relationships of the N component carriers The delay between the first HARQ message and the second HARQ message.

在上述实施例的步骤102中,若存在两个以上时延最小的成员载波,可以根据预先设置,从两个以上具有最小时延的成员载波中选择一个时延最小的成员载波,例如:可以选择具有最小i的成员载波或最大i的成员载波或负载最小的成员载波。另外,也可以根据UE与基站之间的信息交互,例如:基站通知UE该基站选择的一个时延最小的成员载波。In step 102 of the above embodiment, if there are more than two component carriers with the smallest delay, a component carrier with the smallest delay may be selected from the two or more component carriers with the smallest delay according to preset settings, for example: Select the CC with the smallest i or the CC with the largest i or the CC with the smallest load. In addition, it may also be based on information interaction between the UE and the base station, for example, the base station notifies the UE of a CC selected by the base station with the smallest delay.

在LTE TDD系统中,可以将具有互补子帧配比的不同载波进行聚合,形成聚合载波。其中,互补子帧配比是指A DL∶B UL和B DL∶A UL的子帧配比。其中,DL表示下行子帧,包括特殊子帧;UL表示上行子帧,A与B分别给出了连续A+B个子帧中上行子帧与下行子帧的数目,A、B分别为大于或等于零的整数,但A、B不同时为零。在LTE TDD系统支持的7种子帧配比中,只存在3DL∶2UL和2DL∶3UL的互补子帧配比。其中,3DL∶2UL表示每5个连续子帧中有3个下行子帧和2个上行子帧,2DL∶3UL表示每5个连续子帧中有2个下行子帧和3个上行子帧。为了支持更高效率的载波聚合,以支持更宽的传输带宽,LTE-A TDD系统中,还可以支持10DL∶0UL和0DL∶10UL的上、下行子帧配比,并将它们聚合在一起,如图2所示,为10DL∶0UL和0DL∶10UL的上、下行子帧配比的两个成员载波的无线帧结构示意图。图2示出了这两个成员载波在一个无线帧内的子帧分布,一个无线帧的长度为Lradio_frame=10ms,即:10个子帧长。中心频率为f1的成员载波的上、下行子帧配比为0DL∶10UL,中心频率为f2的成员载波的上、下行子帧配比为10DL∶0UL。在中心频率为f1的成员载波中,有一个子帧由下行导频(DwPTS)、上行导频(UpPTS)与空白时隙(Gap)三部分组成,该子帧即为特殊子帧,通常被看作一种具有特殊结构的下行子帧。In the LTE TDD system, different carriers with complementary subframe ratios can be aggregated to form an aggregated carrier. Wherein, the complementary subframe configuration refers to the subframe ratio of A DL:B UL and B DL:A UL. Among them, DL means downlink subframes, including special subframes; UL means uplink subframes, A and B respectively give the number of uplink subframes and downlink subframes in consecutive A+B subframes, and A and B are respectively greater than or An integer equal to zero, but A and B are not zero at the same time. Among the seven subframe configurations supported by the LTE TDD system, there are only complementary subframe configurations of 3DL:2UL and 2DL:3UL. Wherein, 3DL:2UL means that there are 3 downlink subframes and 2 uplink subframes in every 5 consecutive subframes, and 2DL:3UL means that there are 2 downlink subframes and 3 uplink subframes in every 5 consecutive subframes. In order to support more efficient carrier aggregation to support wider transmission bandwidth, LTE-A TDD system can also support uplink and downlink subframe ratios of 10DL:0UL and 0DL:10UL, and aggregate them together, As shown in FIG. 2 , it is a schematic diagram of the radio frame structure of two component carriers with 10DL:0UL and 0DL:10UL uplink and downlink subframes. FIG. 2 shows the subframe distribution of the two component carriers in one radio frame, and the length of one radio frame is L radio_frame =10ms, that is, the length of 10 subframes. The ratio of the uplink and downlink subframes of the component carrier with the center frequency f1 is 0DL:10UL, and the ratio of the uplink and downlink subframes of the component carrier with the center frequency f2 is 10DL:0UL. In the component carrier with the center frequency f 1 , there is a subframe consisting of three parts: downlink pilot (DwPTS), uplink pilot (UpPTS) and blank time slot (Gap). This subframe is a special subframe, usually It is regarded as a downlink subframe with a special structure.

图3为本发明HARQ通信方法另一个实施例的流程图。该实施例中,聚合载波中包括具有互补子帧配比的成员载波。如图3所示,该实施例的HARQ通信方法包括:Fig. 3 is a flow chart of another embodiment of the HARQ communication method of the present invention. In this embodiment, the aggregated carriers include component carriers with complementary subframe ratios. As shown in Figure 3, the HARQ communication method of this embodiment includes:

步骤201,接收第一HARQ消息。Step 201, receiving a first HARQ message.

具体地,该第一HARQ消息可以是当前数据,也可以是ACK/NACK消息。Specifically, the first HARQ message may be current data, or an ACK/NACK message.

步骤202,获取发送第一HARQ消息的第一成员载波的第一子帧配比。Step 202, acquire the first subframe configuration of the first component carrier sending the first HARQ message.

步骤203,查询聚合载波中是否存在具有第二子帧配比的第二成员载波,该第二子帧配比与第一子帧配比为互补子帧配比,第一成员载波与第二成员载波构成具有互补子帧配比的成员载波。若存在,执行步骤204;否则,若不存在,执行步骤206。Step 203, query whether there is a second component carrier with a second subframe configuration in the aggregated carrier, the second subframe configuration and the first subframe configuration are complementary subframe configurations, and the first component carrier and the second subframe configuration are complementary subframe configurations. The component carriers form component carriers with complementary subframe configurations. If yes, go to step 204; otherwise, if not, go to step 206.

步骤204,在存在N个具有互补子帧配比的成员载波时,根据该N个具有互补子帧配比的成员载波的第一HARQ消息与第二HARQ消息之间的时延,从N个具有互补子帧配比的成员载波中选择时延最小的成员载波,该时延最小的成员载波既可以是第一成员载波,也可以是第二成员载波。Step 204, when there are N component carriers with complementary subframe ratios, according to the time delay between the first HARQ message and the second HARQ message of the N component carriers with complementary subframe ratios, from N The component carrier with the smallest delay is selected from the component carriers with complementary subframe ratios, and the component carrier with the smallest delay may be either the first component carrier or the second component carrier.

第一HARQ消息是当前数据时,根据是否正确接收该当前数据,第二HARQ消息为ACK/NACK消息;第一HARQ消息是ACK/NACK消息时,根据是否满足预设数据重传条件,第二HARQ消息为ACK/NACK消息对应的上一个数据或上一个数据的下一个数据。When the first HARQ message is the current data, according to whether the current data is received correctly, the second HARQ message is an ACK/NACK message; when the first HARQ message is an ACK/NACK message, according to whether the preset data retransmission condition is met, the second HARQ message is The HARQ message is the previous data corresponding to the ACK/NACK message or the next data of the previous data.

当聚合载波中包括具有互补子帧配比的成员载波时,从N个具有互补子帧配比的成员载波中选择时延最小的成员载波来传送第二HARQ消息,具有较为简单的HARQ定时关系,降低TDD通信系统的复杂度,并进一步降低HARQ RTT,具有与FDD通信系统相同的HARQ RTT。When the aggregated carrier includes component carriers with complementary subframe ratios, select the component carrier with the smallest delay from the N component carriers with complementary subframe ratios to transmit the second HARQ message, which has a relatively simple HARQ timing relationship , reduce the complexity of the TDD communication system, and further reduce the HARQ RTT, with the same HARQ RTT as the FDD communication system.

步骤205,利用选择出的时延最小的成员载波发送第二HARQ消息。之后,不再执行本实施例的后续流程。Step 205: Send a second HARQ message by using the selected component carrier with the smallest delay. Afterwards, the subsequent procedures of this embodiment are not executed.

步骤206,在第一HARQ消息对端发送的当前数据时,根据是否正确接收该当前数据,从聚合载波中选择具有第一子帧配比的成员载波,来向对端发送ACK/NACK消息。Step 206: When the first HARQ message sends the current data from the opposite end, according to whether the current data is received correctly, select a component carrier with the first subframe ratio from the aggregated carriers to send an ACK/NACK message to the opposite end.

若第一HARQ消息为NACK消息且满足预设数据重传条件,则选择与上一次传送上一个数据相同的成员载波,来重新发送上一个数据。也就是说,接收到的是对端反馈的NACK消息时,向对端发送上一个数据的次数没有达到预先设置的最大重传次数,则采用与上一次传送该上一个数据相同的成员载波,向对端重传该上一个数据。If the first HARQ message is a NACK message and the preset data retransmission condition is satisfied, the same component carrier as the last data transmission is selected to resend the last data. That is to say, when receiving a NACK message fed back by the opposite end, and the number of times the last data is sent to the opposite end does not reach the preset maximum number of retransmissions, the same component carrier as that used to transmit the last data last time is used. Retransmit the last data to the peer.

在通信系统中不存在与发送第一HARQ消息的第一成员载波互为互补子帧配比的第二成员载波时,选择与发送第一HARQ消息的第一成员载波具有相同子帧配比的成员载波来发送ACK/NACK消息,选择首次发送上一个数据的成员载波来重传上一个数据,可以采用与LTE TDD相同的HARQ定时关系,从而避免对LTE-A TDD系统引入复杂的HARQ定时关系。如图4所示,为两个成员载波的一个无线帧结构示意图,图4中,在在相同时刻,两个成员载波要么同为上行子帧,要么同为下行子帧,选择在与发送当前数据的成员载波具有相同上下行子帧配比的成员载波上反馈ACK/NACK消息,HARQ定时关系非常简单。基于图4所示的无线帧结构,基站可以在301所示的子帧时刻通过PDSCH向UE传送当前数据,UE根据是否正确接收该当前数据,选择在302所示的子帧时刻,通过物理上行ACK信道向基站传输ACK/NACK消息,基站根据ACK/NACK消息与预设重传条件,在303所示的子帧时刻通过PDSCH,向UE重传当前数据或传送新的数据。When there is no second component carrier with a complementary subframe ratio to the first component carrier that sends the first HARQ message in the communication system, select a component carrier that has the same subframe ratio as the first component carrier that sends the first HARQ message The component carrier is used to send ACK/NACK messages, and the component carrier that sent the last data for the first time is selected to retransmit the last data. The same HARQ timing relationship as LTE TDD can be used, so as to avoid introducing complex HARQ timing relationship to the LTE-A TDD system. . As shown in Fig. 4, it is a schematic diagram of a wireless frame structure of two component carriers. In Fig. 4, at the same moment, the two component carriers are either uplink subframes or downlink subframes, and the selection between the current ACK/NACK messages are fed back on component carriers with the same ratio of uplink and downlink subframes for data component carriers, and the HARQ timing relationship is very simple. Based on the radio frame structure shown in Figure 4, the base station can transmit the current data to the UE through the PDSCH at the subframe time shown in 301, and the UE selects the subframe time shown in 302 according to whether the current data is received correctly, and transmits the current data through the physical uplink The ACK channel transmits ACK/NACK messages to the base station, and the base station retransmits current data or transmits new data to the UE through the PDSCH at the subframe time shown in 303 according to the ACK/NACK message and preset retransmission conditions.

进一步地,本发明实施例提供的各HARQ通信方法中,可以根据具有互补子帧配比的成员载波的无线帧内的子帧分布,调整具有互补子帧配比的成员载波的相对定时关系,使得具有互补子帧配比的任意两个成员载波,在任意时刻有一个成员载波为下行子帧而另一成员载波为上行子帧。具体的,可以采用如下方法调整具有互补子帧配比的成员载波的相对定时关系:在选择时延最小的成员载波之前,对齐聚合载波中具有互补子帧配比的成员载波之间的子帧时刻;然后根据互补子帧配比,在具有互补子帧配比的成员载波之间引入一个子帧偏置,使得在具有互补子帧配比的成员载波中,任意时刻有一个成员载波为下行子帧,有另一个成员载波为上行子帧。Further, in each of the HARQ communication methods provided in the embodiments of the present invention, the relative timing relationship of the component carriers with complementary subframe ratios may be adjusted according to the subframe distribution in the wireless frame of the component carriers with complementary subframe ratios, For any two component carriers with complementary subframe ratios, at any moment, one component carrier is a downlink subframe and the other component carrier is an uplink subframe. Specifically, the following method can be used to adjust the relative timing relationship of component carriers with complementary subframe ratios: before selecting the component carrier with the smallest delay, align the subframes between the component carriers with complementary subframe ratios in the aggregated carrier time; then according to the complementary subframe ratio, a subframe offset is introduced between the component carriers with complementary subframe ratios, so that at any time, one component carrier is downlink in the component carriers with complementary subframe ratios subframe, and another component carrier is an uplink subframe.

若具有互补子帧配比的成员载波的无线帧内具有L个子帧,其中,L为大于1的整数,第一子帧配比表示为A DL∶B UL,第二子帧配比表示为B DL∶A UL,通常情况下,L在取值上等于A+B或A+B的倍数,也即:L=n(A+B),其中,n为大于或等于1的整数,则在具有互补子帧配比的成员载波之间引入一个子帧偏置具体为:在具有互补子帧配比的成员载波之间引入Bmod(A+B)、或者BmodL或者(A+2B)modL个子帧偏置,使第二成员载波比第一成员载波的无线帧延迟Bmod(A+B)、或者BmodL或者(A+2B)modL个子帧时间,其中,Bmod(A+B)表示B对(A+B)的取模运算,BmodL表示B对L的取模运算,(A+2B)modL表示(A+2B)对L的取模运算。If there are L subframes in the radio frame of the component carrier with complementary subframe ratio, where L is an integer greater than 1, the first subframe ratio is expressed as A DL:B UL, and the second subframe ratio is expressed as B DL: A UL, under normal circumstances, the value of L is equal to the multiple of A+B or A+B, that is: L=n(A+B), where n is an integer greater than or equal to 1, then Introducing a subframe offset between component carriers with complementary subframe ratios is specifically: introducing Bmod(A+B), or BmodL or (A+2B)modL between component carriers with complementary subframe ratios subframe offset, so that the second component carrier is delayed by Bmod(A+B), or BmodL, or (A+2B)modL subframe times from the radio frame of the first component carrier, where Bmod(A+B) represents the B pair (A+B) modulo operation, BmodL represents the modulo operation of B to L, and (A+2B)modL represents the modulo operation of (A+2B) to L.

例如:一个无线帧由10个子帧组成,分别记为子帧0~9,其中子帧0为无线帧的起始,则根据本发明上述实施例的上述相对定时关系调整方法,只要将上、下行子帧配比为2DL∶3UL的成员载波的无线帧相对于上下行子帧配比为3DL∶2UL的成员载波的无线帧延迟2个或7个子帧的时间,就可以使得在任意时刻有一个成员载波为下行子帧而另一成员载波为上行子帧。如图5所示,为本发明相对定时关系调整后的一个无线帧结构示意图,图5中,将上、下行子帧配比为2DL∶3UL的成员载波的无线帧相对于上下行子帧配比为3DL∶2UL的成员载波的无线帧延迟了2个子帧的时间。如图6所示,为本发明相对定时关系调整后的另一个无线帧结构示意图,图6中,将上、下行子帧配比为2DL∶3UL的成员载波的无线帧相对于上下行子帧配比为3DL∶2UL的成员载波的无线帧延迟了7个子帧的时间。For example: a wireless frame is composed of 10 subframes, which are respectively marked as subframes 0-9, wherein subframe 0 is the start of the wireless frame, then according to the above-mentioned relative timing relationship adjustment method of the above-mentioned embodiment of the present invention, as long as the above, The radio frame of the component carrier whose downlink subframe ratio is 2DL:3UL is delayed by 2 or 7 subframes relative to the radio frame of the component carrier whose uplink and downlink subframe ratio is 3DL:2UL, so that at any time there is One component carrier is a downlink subframe and the other component carrier is an uplink subframe. As shown in Figure 5, it is a schematic diagram of a wireless frame structure after the relative timing relationship of the present invention is adjusted. In Figure 5, the configuration of the uplink and downlink subframes is as follows: It is delayed by 2 subframes from the radio frame of the 3DL:2UL component carrier. As shown in FIG. 6, it is a schematic diagram of another wireless frame structure after the relative timing relationship adjustment of the present invention. In FIG. 6, the ratio of uplink and downlink subframes is 2DL: 3UL. The radio frame of the component carrier with a ratio of 3DL:2UL is delayed by 7 subframes.

对具有互补子帧配比的任意两个成员载波,调整相对定时关系后,根据第一HARQ消息,选择时延最小的成员载波向对端反馈第二HARQ消息时,由于在任意时刻都有一个成员载波为下行子帧而另一成员载波为上行子帧,于是总有

Figure B2009101601739D0000131
HARQ定时关系简单,同时具有与FDD系统相同的、最小的HARQ RTT时延。假设T0=T1=4ms,即:4个子帧长,基于图4所示的帧结构发送HARQ消息的一个时刻示意图,如图7所示。如果对基站在PDSCH传送的当前数据,若UE仍然在上、下行子帧配比为3DL∶2UL的成员载波上传输ACK/NACK消息,基站仍然在上、下行子帧配比为3DL∶2UL的成员载波上重传当前数据或发送新的数据,则HARQ RTT是11ms。而由图7可知,采用具有互补子帧配比的任意两个成员载波来传送当前数据、ACK/NACK消息、重传当前数据或发送新的数据,例如:分别在401、402与403所示的子帧时刻传送当前数据、ACK/NACK消息、重传当前数据或发送新的数据,则HARQ RTT降低为8ms,比之前的11ms又减少了3ms。For any two component carriers with complementary subframe ratios, after adjusting the relative timing relationship, according to the first HARQ message, when selecting the component carrier with the smallest delay to feed back the second HARQ message to the opposite end, since there is a A component carrier is a downlink subframe and another component carrier is an uplink subframe, so there is always
Figure B2009101601739D0000131
The HARQ timing relationship is simple, and has the same minimum HARQ RTT delay as the FDD system. Assuming that T0=T1=4ms, namely: 4 subframes long, a schematic diagram of a moment of sending a HARQ message based on the frame structure shown in FIG. 4 is shown in FIG. 7 . For the current data transmitted by the base station on the PDSCH, if the UE still transmits ACK/NACK messages on the component carrier with the uplink and downlink subframe ratio of 3DL:2UL, the base station still transmits the ACK/NACK message on the component carrier with the uplink and downlink subframe ratio of 3DL:2UL If the current data is retransmitted or new data is sent on the component carrier, the HARQ RTT is 11ms. It can be seen from FIG. 7 that any two component carriers with complementary subframe ratios are used to transmit current data, ACK/NACK messages, retransmit current data or send new data, for example, as shown in 401, 402 and 403 respectively If the current data, ACK/NACK message is transmitted, current data is retransmitted or new data is sent at the time of the subframe, the HARQ RTT is reduced to 8ms, which is 3ms lower than the previous 11ms.

图8为本发明HARQ通信装置一个实施例的结构示意图,该实施例的HARQ通信装置可用于实现本发明上述各实施例的HARQ通信方法。如图8所示,该实施例的HARQ通信装置包括接收模块501、选择模块502与发送模块503。其中,接收模块501用于接收第一HARQ消息。选择模块502用于在接收模块501接收到第一HARQ消息后,根据聚合载波中可用于发送第二HARQ消息的N个成员载波的第一HARQ消息与第二HARQ消息之间的时延,从可用于发送第二HARQ消息的N个成员载波中选择时延最小的成员载波。其中,第一HARQ消息为当前数据,相应的,第二HARQ消息为ACK/NACK消息;或者,第一HARQ消息为ACK/NACK消息,相应的,第二HARQ消息为与该ACK/NACK消息对应的上一个数据或该上一个数据的下一个数据。发送模块503用于利用选择模块502选择出的时延最小的成员载波发送第二HARQ消息。FIG. 8 is a schematic structural diagram of an embodiment of a HARQ communication device according to the present invention. The HARQ communication device of this embodiment can be used to implement the HARQ communication methods of the above-mentioned embodiments of the present invention. As shown in FIG. 8 , the HARQ communication device of this embodiment includes a receiving module 501 , a selecting module 502 and a sending module 503 . Wherein, the receiving module 501 is configured to receive the first HARQ message. The selection module 502 is configured to, after the receiving module 501 receives the first HARQ message, according to the time delay between the first HARQ message and the second HARQ message of the N component carriers that can be used to send the second HARQ message in the aggregated carrier, from A component carrier with the smallest time delay is selected from the N component carriers available for sending the second HARQ message. Wherein, the first HARQ message is the current data, and correspondingly, the second HARQ message is an ACK/NACK message; or, the first HARQ message is an ACK/NACK message, and correspondingly, the second HARQ message corresponds to the ACK/NACK message The previous data of or the next data of the previous data. The sending module 503 is configured to use the CC selected by the selecting module 502 with the smallest delay to send the second HARQ message.

图9为本发明HARQ通信装置另一个实施例的结构示意图,与图8所示实施例的HARQ通信装置相比,该实施例的HARQ通信装置还包括存储模块504与第一获取模块505。其中,存储模块504用于存储N个成员载波的上、下行子帧配比下的HARQ定时关系。第一获取模块505用于分别从存储模块504获取N个成员载波的上、下行子帧配比下的HARQ定时关系,并根据该HARQ定时关系,获取N个成员载波的第一HARQ消息与第二HARQ消息之间的时延。相应的,选择模块502根据第一获取模块505获取到的N个成员载波的第一HARQ消息与第二HARQ消息之间的时延,从可用于发送第二HARQ消息的N个成员载波中选择时延最小的成员载波。FIG. 9 is a schematic structural diagram of another embodiment of the HARQ communication device of the present invention. Compared with the HARQ communication device of the embodiment shown in FIG. 8 , the HARQ communication device of this embodiment further includes a storage module 504 and a first acquisition module 505 . Wherein, the storage module 504 is used for storing the HARQ timing relationship under the configuration of uplink and downlink subframes of N component carriers. The first obtaining module 505 is used to respectively obtain the HARQ timing relationship under the uplink and downlink subframe ratios of the N component carriers from the storage module 504, and obtain the first HARQ message and the first HARQ message of the N component carriers according to the HARQ timing relationship. Delay between two HARQ messages. Correspondingly, the selection module 502 selects from the N component carriers that can be used to send the second HARQ message according to the time delay between the first HARQ message and the second HARQ message of the N component carriers acquired by the first acquisition module 505 The component carrier with the smallest delay.

在聚合载波中包括具有互补子帧配比的成员载波时,如图10所示,为本发明HARQ通信装置又一个实施例的结构示意图,与图8或图9所示的实施例先比,该实施例中,HARQ通信装置还包括第二获取模块506与查询模块507。其中,第二获取模块506用于在接收模块501接收到第一HARQ消息后,获取发送第一HARQ消息的第一成员载波的第一子帧配比。查询模块507用于查询聚合载波中是否存在具有第二子帧配比的第二成员载波,其中,第二子帧配比与第二获取模块506获取到的第一子帧配比为互补子帧配比,第一成员载波与第二成员载波构成具有互补子帧配比的成员载波。相应的,选择模块502具体根据查询模块507的查询结果,在存在N个具有互补子帧配比的成员载波时,根据该N个具有互补子帧配比的成员载波的第一HARQ消息与第二HARQ消息之间的时延,从具有互补子帧配比的成员载波中选择时延最小的成员载波;在存在一个第二成员载波时,直接以该第二成员载波作为时延最小的第二成员载波。When the aggregated carrier includes component carriers with complementary subframe ratios, as shown in FIG. 10 , it is a schematic structural diagram of another embodiment of the HARQ communication device of the present invention. Compared with the embodiment shown in FIG. 8 or FIG. 9 , In this embodiment, the HARQ communication device further includes a second obtaining module 506 and a query module 507 . Wherein, the second acquiring module 506 is configured to acquire the first subframe configuration of the first component carrier sending the first HARQ message after the receiving module 501 receives the first HARQ message. The query module 507 is configured to query whether there is a second component carrier with a second subframe configuration in the aggregated carrier, where the second subframe configuration is complementary to the first subframe configuration obtained by the second acquisition module 506 In the frame configuration, the first component carrier and the second component carrier form a component carrier with a complementary subframe ratio. Correspondingly, according to the query result of the query module 507, the selection module 502, when there are N component carriers with complementary subframe configurations, according to the first HARQ message and the first HARQ message of the N component carriers with complementary subframe ratios For the delay between two HARQ messages, select the component carrier with the smallest delay from the component carriers with complementary subframe ratios; when there is a second component carrier, directly use the second component carrier as the first component carrier with the smallest delay. Two component carriers.

若图10所示的HARQ通信装置中还包括存储模块504与第一获取模块505,则第一获取模块505分别从存储模块504获取由查询模块507查询到的第二子帧配比下的HARQ定时关系,并根据该HARQ定时关系,获取具有第二子帧配比的成员载波的第一HARQ消息与第二HARQ消息之间的时延。相应的,选择模块502根据第一获取模块505获取到的N个成员载波的第一HARQ消息与第二HARQ消息之间的时延,从可用于发送第二HARQ消息的N个成员载波中选择时延最小的成员载波。If the HARQ communication device shown in FIG. 10 further includes a storage module 504 and a first acquisition module 505, the first acquisition module 505 respectively acquires the HARQ data in the second subframe ratio queried by the query module 507 from the storage module 504. timing relationship, and according to the HARQ timing relationship, acquire the time delay between the first HARQ message and the second HARQ message of the component carrier with the second subframe configuration. Correspondingly, the selection module 502 selects from the N component carriers that can be used to send the second HARQ message according to the time delay between the first HARQ message and the second HARQ message of the N component carriers acquired by the first acquisition module 505 The component carrier with the smallest delay.

图11为本发明HARQ通信装置再一个实施例的结构示意图,与图10所示的实施例相比,该实施例的HARQ通信装置还包括第一调整模块508与第二调整模块509。其中,第一调整模块508用于根据查询模块507的查询结果,对齐聚合载波中具有互补子帧配比的成员载波之间的子帧时刻。第二调整模块509用于在第一调整模块508对齐聚合载波中具有互补子帧配比的成员载波之间的子帧时刻后,根据互补子帧配比,在具有互补子帧配比的成员载波之间引入一个子帧偏置,使得在具有互补子帧配比的成员载波中,任意时刻有一个成员载波为下行子帧,有另一个成员载波为上行子帧。相应的,选择模块502在第二调整模块509在具有互补子帧配比的成员载波之间引入一个子帧偏置后,选择时延最小的成员载波。FIG. 11 is a schematic structural diagram of another embodiment of the HARQ communication device of the present invention. Compared with the embodiment shown in FIG. 10 , the HARQ communication device of this embodiment further includes a first adjustment module 508 and a second adjustment module 509 . Wherein, the first adjustment module 508 is configured to align subframe times between component carriers with complementary subframe ratios in the aggregated carrier according to the query result of the query module 507 . The second adjustment module 509 is configured to, after the first adjustment module 508 aligns the subframe moments between the component carriers with complementary subframe ratios in the aggregated carrier, according to the complementary subframe ratios, in the component carriers with complementary subframe ratios A subframe offset is introduced between the carriers, so that among component carriers with complementary subframe ratios, at any moment, one component carrier is a downlink subframe, and the other component carrier is an uplink subframe. Correspondingly, after the second adjustment module 509 introduces a subframe offset between component carriers with complementary subframe ratios, the selection module 502 selects the component carrier with the smallest delay.

同样,若图11所示的HARQ通信装置中还包括存储模块504与第一获取模块505,则第一获取模块505分别从存储模块504获取由第二调整模块509引入一个子帧偏置后的互补子帧配比下的HARQ定时关系,并根据该HARQ定时关系,获取具有互补子帧配比的成员载波的第一HARQ消息与第二HARQ消息之间的时延。相应的,选择模块502根据第一获取模块505获取到的N个成员载波的第一HARQ消息与第二HARQ消息之间的时延,从可用于发送第二HARQ消息的N个成员载波中选择时延最小的成员载波。Similarly, if the HARQ communication device shown in FIG. 11 further includes a storage module 504 and a first acquisition module 505, the first acquisition module 505 respectively acquires from the storage module 504 the subframe offset introduced by the second adjustment module 509 The HARQ timing relationship under the complementary subframe configuration, and according to the HARQ timing relationship, obtain the time delay between the first HARQ message and the second HARQ message of the component carrier with the complementary subframe configuration. Correspondingly, the selection module 502 selects from the N component carriers that can be used to send the second HARQ message according to the time delay between the first HARQ message and the second HARQ message of the N component carriers acquired by the first acquisition module 505 The component carrier with the smallest delay.

进一步地,本发明实施例的HARQ通信装置中,选择模块502还可用于根据查询模块507的查询结果,在不存在第二成员载波时,若第一HARQ消息为当前数据,则从聚合载波中选择具有第一子帧配比的成员载波,并指示发送模块503以该具有第一子帧配比的成员载波发送ACK/NACK消息;若第一HARQ消息为NACK消息且满足预设数据重传条件,则选择与上一次传送上一个数据相同的成员载波,并指示发送模块503以该与上一次传送上一个数据相同的成员载波重新发送上一个数据。Further, in the HARQ communication device according to the embodiment of the present invention, the selection module 502 can also be used to select from the aggregation carrier if the first HARQ message is the current data when the second component carrier does not exist according to the query result of the query module 507. Select the component carrier with the first subframe ratio, and instruct the sending module 503 to send the ACK/NACK message with the component carrier with the first subframe ratio; if the first HARQ message is a NACK message and meets the preset data retransmission condition, select the same component carrier as the last data transmission, and instruct the sending module 503 to resend the last data with the same component carrier as the last data transmission.

本发明实施例还提供了一种UE,包括本发明图8至图11任一实施例提供的HARQ通信装置。An embodiment of the present invention also provides a UE, including the HARQ communication device provided in any one of the embodiments in FIG. 8 to FIG. 11 of the present invention.

本发明实施例还提供了一种基站,包括本发明图8至图11任一实施例提供的HARQ通信装置。An embodiment of the present invention also provides a base station, including the HARQ communication device provided in any one of the embodiments in FIG. 8 to FIG. 11 of the present invention.

另外,本发明实施例还提供了一种通信系统,包括UE与基站,在UE与基站中有一个包括本发明图8至图11任一实施例提供的HARQ通信装置,或者UE与基站中都包括本发明图8至图11任一实施例提供的HARQ通信装置。In addition, an embodiment of the present invention also provides a communication system, including a UE and a base station, and one of the UE and the base station includes the HARQ communication device provided by any one of the embodiments in FIG. 8 to FIG. 11 of the present invention, or both the UE and the base station It includes the HARQ communication device provided in any embodiment of FIG. 8 to FIG. 11 of the present invention.

本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

本发明实施例可以在HARQ过程中,当聚合载波中不同成员载波具有不同的上、下行子帧配比时,UE或基站在接收到第一HARQ消息后,选择第一HARQ消息与第二HARQ消息之间的时延最小的成员载波来发送第二HARQ消息,从而有效减少HARQ RTT,满足实时业务需求;In the embodiment of the present invention, in the HARQ process, when different component carriers in the aggregated carrier have different uplink and downlink subframe configurations, the UE or the base station selects the first HARQ message and the second HARQ message after receiving the first HARQ message. The component carrier with the smallest delay between messages sends the second HARQ message, thereby effectively reducing HARQ RTT and meeting real-time service requirements;

进一步地,本发明实施例中,当聚合载波中包括具有互补子帧配比的成员载波时,从具有互补子帧配比的成员载波中选择时延最小的成员载波来传送第二HARQ消息,具有较为简单的HARQ定时关系,降低TDD通信系统的复杂度,并进一步降低HARQ RTT。Further, in the embodiment of the present invention, when the aggregated carrier includes component carriers with complementary subframe configurations, select the component carrier with the smallest delay from the component carriers with complementary subframe configurations to transmit the second HARQ message, It has a relatively simple HARQ timing relationship, reduces the complexity of the TDD communication system, and further reduces the HARQ RTT.

最后所应说明的是:以上实施例仅用以说明本发明的技术方案,而非对本发明作限制性理解。尽管参照上述较佳实施例对本发明进行了详细说明,本领域的普通技术人员应当理解:其依然可以对本发明的技术方案进行修改或者等同替换,而这种修改或者等同替换并不脱离本发明技术方案的精神和范围。Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present invention, rather than limiting the understanding of the present invention. Although the present invention has been described in detail with reference to the above-mentioned preferred embodiments, those skilled in the art should understand that: it can still modify or replace the technical solution of the present invention, and such modification or replacement does not depart from the technology of the present invention. The spirit and scope of the programme.

Claims (16)

1. A method for hybrid automatic repeat request communication, comprising:
receiving a first hybrid automatic repeat request (HARQ) message;
selecting a member carrier with the minimum time delay from N member carriers which can be used for sending a second HARQ message according to the time delay between a first HARQ message and the second HARQ message of the N member carriers which can be used for sending the second HARQ message in the aggregated carriers, wherein N is an integer larger than 1; the first HARQ message is current data, and the second HARQ message is an acknowledgement response message or a negative acknowledgement message ACK/NACK message, or the first HARQ message is an ACK/NACK message, and the second HARQ message is previous data corresponding to the ACK/NACK message or next data of the previous data;
and sending a second HARQ message by utilizing the member carrier with the minimum time delay.
2. The method of claim 1, wherein before the selecting the component carrier with the smallest delay, further comprising:
respectively acquiring preset HARQ timing relations under the uplink subframe ratio and the downlink subframe ratio of the N member carriers;
and acquiring the time delay between the first HARQ message and the second HARQ message of the N member carriers according to the HARQ timing relation of the N member carriers.
3. The method according to claim 1, wherein the receiving the first HARQ message specifically comprises: the user terminal UE receives the current data sent by the base station through a physical downlink shared channel PDSCH; the time delay between the first HARQ message and the second HARQ message is specifically: the uplink time which is closest to the time of receiving the first HARQ message is not less than the first preset constant time; the sending of the second HARQ message specifically includes: sending ACK/NACK information to a base station through a physical uplink ACK channel; or
The receiving the first HARQ message specifically includes: the base station receives the current data sent by the UE through a Physical Uplink Shared Channel (PUSCH); the time delay between the first HARQ message and the second HARQ message is specifically: the downlink time which is closest to the time of receiving the first HARQ message is not less than the first preset constant time; the sending of the second HARQ message specifically includes: sending ACK/NACK information to UE through a physical downlink ACK channel; or
The receiving the first HARQ message specifically includes: the UE receives an ACK/NACK message sent by a base station through a physical downlink ACK channel; the time delay between the first HARQ message and the second HARQ message is specifically: the uplink time which is not less than the nearest uplink time of the second preset constant time from the time of receiving the ACK/NACK message; the sending of the second HARQ message specifically includes: sending the previous data or the next data of the previous data corresponding to the ACK/NACK message to the base station through a PUSCH; or
The receiving the first HARQ message specifically includes: a base station receives an ACK/NACK message sent by UE through a physical uplink ACK channel; the time delay between the first HARQ message and the second HARQ message is specifically: the downlink time which is not less than the nearest downlink time of the second preset constant time from the time of receiving the ACK/NACK message; the sending of the second HARQ message specifically includes: and sending the last data or the next data of the last data corresponding to the ACK/NACK message to the UE through the PDSCH.
4. The method according to claim 1, wherein the selecting the component carrier with the smallest time delay from the N component carriers available for transmitting the second HARQ message is specifically: and if more than two member carriers with the minimum time delay exist in the N member carriers, selecting one member carrier with the minimum time delay from the more than two member carriers with the minimum time delay according to preset or information interaction between the UE and the base station.
5. The method according to any one of claims 1 to 4, wherein the aggregated carriers include component carriers with complementary subframe matching;
after receiving the first HARQ message, the method further includes: acquiring a first subframe ratio of a first member carrier for sending the first HARQ message; querying whether a second member carrier with a second subframe ratio exists in the aggregated carriers, wherein the second subframe ratio and the first subframe ratio are complementary subframe ratios, and the first member carrier and the second member carrier form a member carrier with a complementary subframe ratio;
selecting a component carrier with the minimum time delay from the N component carriers available for transmitting the second HARQ message according to the time delay between the first HARQ message and the second HARQ message of the N component carriers available for transmitting the second HARQ message comprises: and when N member carriers with complementary subframe matching exist, selecting the member carrier with the minimum time delay from the N member carriers with complementary subframe matching according to the time delay between the first HARQ message and the second HARQ message of the N member carriers with complementary subframe matching.
6. The method of claim 5, wherein before selecting a component carrier with a minimum delay from the N component carriers with complementary subframe matching, further comprising:
aligning the sub-frame time between member carriers with complementary sub-frame ratio in the aggregated carrier;
according to the complementary subframe ratio, a subframe offset is introduced between the member carriers with the complementary subframe ratio, so that one member carrier is a downlink subframe and the other member carrier is an uplink subframe at any time in the member carriers with the complementary subframe ratio.
7. The method of claim 6, wherein there are L subframes in the radio frame of the component carriers with complementary subframe matching, wherein L is an integer greater than 1;
the first subframe ratio is A DL to B UL, the second subframe ratio is B DL to A UL, wherein A, B are integers which are larger than or equal to zero respectively, A, B is not zero at the same time, L is n (A + B), n is an integer which is larger than or equal to 1, UL is an uplink subframe, and DL is a downlink subframe;
introducing a subframe offset between the component carriers with complementary subframe matching specifically comprises: introducing Bmod (A + B), or Bmod L or (A +2B) mod L subframe offset between component carriers with complementary subframe ratio, and delaying the second component carrier by Bmod (A + B), or Bmod L or (A +2B) mod L subframe time than the wireless frame of the first component carrier, wherein Bmod (A + B) represents the modulus operation of B to (A + B).
8. The method of claim 5, further comprising:
when a second component carrier does not exist, if the first HARQ message is current data, selecting a component carrier with a first subframe ratio from the aggregation carrier to send the ACK/NACK message; and if the first HARQ message is a NACK message and meets a preset data retransmission condition, selecting the same member carrier as the last data transmitted last time to retransmit the last data.
9. A hybrid automatic repeat request communication apparatus, comprising:
a receiving module, configured to receive a first HARQ message;
a selecting module, configured to select, according to a time delay between a first HARQ message and a second HARQ message of N component carriers that are available to send a second HARQ message in an aggregated carrier, a component carrier with a minimum time delay from the N component carriers that are available to send the second HARQ message; the first HARQ message is current data, and the second HARQ message is an ACK/NACK message, or the first HARQ message is an ACK/NACK message, and the second HARQ message is previous data corresponding to the ACK/NACK message or next data of the previous data;
and a sending module, configured to send a second HARQ message using the component carrier with the minimum time delay.
10. The apparatus of claim 9, further comprising:
a storage module, configured to store the HARQ timing relationship in the uplink and downlink subframe ratios of the N component carriers;
a first obtaining module, configured to obtain, from the storage module, HARQ timing relationships in the uplink and downlink subframe ratios of the N component carriers, respectively, and obtain, according to the HARQ timing relationships, a time delay between a first HARQ message and a second HARQ message of the N component carriers.
11. The apparatus according to claim 9 or 10, wherein the aggregated carriers include component carriers with complementary subframe matching;
the device further comprises:
a second obtaining module, configured to obtain a first subframe ratio of a first component carrier that sends the first HARQ message;
the query module is used for querying whether a second member carrier with a second subframe ratio exists in the aggregated carriers, the second subframe ratio and the first subframe ratio are complementary subframe ratios, and the first member carrier and the second member carrier form a member carrier with a complementary subframe ratio;
the selection module selects a component carrier with the minimum time delay from the N component carriers with the complementary subframe ratio according to the time delay between the first HARQ message and the second HARQ message of the N component carriers with the complementary subframe ratio when the N component carriers with the complementary subframe ratio exist according to the query result of the query module.
12. The apparatus of claim 11, further comprising:
a first adjusting module, configured to align subframe moments between component carriers with complementary subframe ratios in the aggregated carrier according to a query result of the querying module;
a second adjusting module, configured to introduce a subframe offset between component carriers with complementary subframe ratios according to the complementary subframe ratios after the first adjusting module aligns subframe moments between the component carriers with complementary subframe ratios in the aggregated carriers, so that one component carrier is a downlink subframe and another component carrier is an uplink subframe at any time in the component carriers with complementary subframe ratios;
the selection module selects the component carrier with the minimum time delay after introducing a subframe offset between the component carriers with the complementary subframe ratio in the second adjustment module.
13. The apparatus of claim 12, wherein the selecting module is further configured to select a component carrier with a first subframe ratio from the aggregated carriers if the first HARQ message is current data according to the query result of the querying module, and instruct the sending module to send the ACK/NACK message on the component carrier with the first subframe ratio; and if the first HARQ message is a NACK message and meets a preset data retransmission condition, selecting the member carrier wave which is the same as the member carrier wave for transmitting the previous data last time, and indicating the transmitting module to retransmit the previous data by the member carrier wave which is the same as the member carrier wave for transmitting the previous data last time.
14. A user terminal comprising the hybrid automatic repeat request communication device according to any of claims 9 to 13.
15. A base station comprising a hybrid automatic repeat request communication device according to any of claims 9 to 13.
16. A communication system comprising a user terminal and a base station, wherein the hybrid automatic repeat request communication apparatus according to any of claims 9 to 13 is comprised in the user terminal and/or the base station.
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