CN101039165A - Information feedback method based on multi-antenna self-adaptive modulation coding and apparatus thereof - Google Patents
Information feedback method based on multi-antenna self-adaptive modulation coding and apparatus thereofDownload PDFInfo
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Abstract
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Description
Translated fromChinese技术领域technical field
本发明涉及移动通信系统中的多输入多输出(MIMO，Multi-InputMulti-Output)技术和自适应调制编码(AMC，Adaptive Modulation and Coding)技术，尤其是涉及一种基于多天线自适应调制编码的信息反馈方法及其装置。The present invention relates to multiple-input multiple-output (MIMO, Multi-InputMulti-Output) technology and adaptive modulation coding (AMC, Adaptive Modulation and Coding) technology in the mobile communication system, especially relates to a kind of multi-antenna based adaptive modulation coding Information feedback method and device thereof.
背景技术Background technique
目前，由于多输入多输出(MIMO，Multi-Input Multi-Output)技术无论是从增加系统容量的角度还是从改善系统性能的角度都有其他技术不可替代的优越性，因此MIMO技术在移动通信系统中的应用越来越得到重视。其中MIMO技术主要包括两大类，一类是以最大化分集增益为目的的空间分集技术，另一类则是以最大化数据速率为目的的空分复用技术。At present, because MIMO (Multi-Input Multi-Output) technology has irreplaceable advantages in terms of increasing system capacity and improving system performance, MIMO technology is widely used in mobile communication systems. The application in is getting more and more attention. Among them, MIMO technology mainly includes two categories, one is space diversity technology for the purpose of maximizing diversity gain, and the other is space division multiplexing technology for the purpose of maximizing data rate.
其中，MIMO技术中的空分复用技术典型的可以分为以下两种模式：Among them, the space division multiplexing technology in the MIMO technology can typically be divided into the following two modes:
(1)单码字(SCW，Single Code Word)模式(1) Single Code Word (SCW, Single Code Word) mode
如图1所示，为现有MIMO技术中SCW模式的数据发送处理过程示意图，其中发送端将待发送的数据流首先经过信道编码、交织及其星座图映射等处理后，分路为M路(M为发送端包括的天线数目)相同速率的数据流，每路数据流经过相应的信道化处理后分别经不同的天线发射出去。As shown in Figure 1, it is a schematic diagram of the data transmission process of the SCW mode in the existing MIMO technology, wherein the data stream to be transmitted is firstly processed by the transmitting end through channel coding, interleaving and constellation map mapping, etc., and then divided into M channels (M is the number of antennas included in the transmitting end) For data streams of the same rate, each data stream is transmitted through different antennas after corresponding channelization processing.
其中根据系统所采用的多址方式不同，发送端包括的这M个天线发射的数据占用相同的信道码或频率或时间等信道资源；例如，对码分多址(CDMA)系统而言，发送端包括的M个天线会使用相同的信道码，而对正交频分多址(OFDMA)系统而言，发送端包括的M个天线会使用相同的一组子载波等，该图1中所示的信道化处理即指根据系统所采用的多址方式，将要通过相应天线发射出去的信号进行扩频处理(对CDMA系统而言)、子载波映射处理(对OFDMA系统而言)等。Among them, according to the different multiple access methods adopted by the system, the data transmitted by the M antennas included in the transmitting end occupy the same channel resources such as channel code or frequency or time; for example, for a code division multiple access (CDMA) system, the transmission The M antennas included in the transmitting end will use the same channel code, and for an Orthogonal Frequency Division Multiple Access (OFDMA) system, the M antennas included in the transmitting end will use the same set of subcarriers, etc., as shown in Figure 1 The channelization processing shown in the figure refers to the spread spectrum processing (for the CDMA system) and subcarrier mapping processing (for the OFDMA system) of the signal to be transmitted through the corresponding antenna according to the multiple access method adopted by the system.
(2)多码字(MCW，Multiple Code Word)模式(2) Multiple Code Word (MCW, Multiple Code Word) mode
如图2所示，为现有MIMO技术中MCW模式的数据发送处理过程示意图，其中发送端将待发送数据流首先分路为M路数据流，每一路数据流的速率分别和M个发射天线中的一个对应天线能够支持的数据传输速率相符，然后每一路数据流分别经过独立的信道编码、交织及其星座图映射等处理后，最后分别由相应的发射天线发射出去。同理，根据系统所采用的多址方式不同，这M个发射天线发射的数据流占用相同的信道码或频率或时间等信道资源，例如，对CDMA系统而言，这M个发射天线使用相同的信道码，对OFDMA系统而言，这M个发射天线使用相同的一组子载波等。As shown in Figure 2, it is a schematic diagram of the data transmission process in the MCW mode in the existing MIMO technology, wherein the transmitting end first divides the data stream to be transmitted into M data streams, and the rate of each data stream is respectively related to the M transmitting antennas The data transmission rate supported by one of the corresponding antennas is consistent, and then each data stream is processed by independent channel coding, interleaving and constellation map mapping, etc., and finally transmitted by the corresponding transmitting antenna. Similarly, according to the different multiple access methods adopted by the system, the data streams transmitted by the M transmit antennas occupy the same channel resources such as channel code or frequency or time. For example, for a CDMA system, the M transmit antennas use the same For the OFDMA system, the M transmit antennas use the same group of subcarriers and so on.
此外，目前在移动通信系统中也通常会用到自适应调制和编码(AMC，Adaptive Modulation and Coding)技术，AMC技术具体是指接收端将测量的信道质量等信息通过反馈信道反馈给发射端，以使得发射端进而根据接收端反馈的信道质量等信息选择合适的信道编码及其调制等方式，来进行信道编码及其调制等处理，其中接收端反馈的信道质量等信息包括编码类型、编码速率、调制方式(如QPSK/16QAM)等信息，从而达到使信道的自适应并最大化传输速率的目的。In addition, adaptive modulation and coding (AMC, Adaptive Modulation and Coding) technology is usually used in mobile communication systems at present. AMC technology specifically means that the receiver feeds back the measured channel quality and other information to the transmitter through the feedback channel. In order to enable the transmitting end to select appropriate channel coding and modulation methods according to the channel quality and other information fed back by the receiving end to perform channel coding and modulation and other processing, where the channel quality and other information fed back by the receiving end includes coding type, coding rate, etc. , Modulation mode (such as QPSK/16QAM) and other information, so as to achieve the purpose of adapting the channel and maximizing the transmission rate.
其中在AMC技术的具体实施过程中，为了减少接收端反馈信道质量等信息所带来的控制信令开销，通用的做法是将发射端所支持的典型调制和编码方式(MCS，Modulation and Coding Scheme)与对应的信道质量指示值(CQI，Channel Quality Indicator)之间建立对应关系，从而制成一个CQI索引表同时保存在发射端和接收端。这样接收端就可以根据自身接收机支持的性能要求，来预先确定其在一定的接收性能(如误码率等)要求下接收每一种MCS所需要的信道质量(典型地是以信号干扰噪声比SINR，Signal to Interference andNoise Ratio来表征的)，因此接收端就可以根据实际测量到的信道质量来就判断其能够接收的MCS，并将该MCS在所述CQI索引表中对应的CQI值反馈给发射端，从而减少接收端反馈的控制信令开销。Among them, in the specific implementation process of AMC technology, in order to reduce the control signaling overhead caused by the feedback of channel quality and other information at the receiving end, the common practice is to use the typical modulation and coding scheme (MCS, Modulation and Coding Scheme) supported by the transmitting end ) and the corresponding channel quality indicator (CQI, Channel Quality Indicator) to establish a corresponding relationship, so as to make a CQI index table and save it at the transmitting end and the receiving end at the same time. In this way, the receiving end can pre-determine the channel quality (typically signal-interference-noise than SINR, Signal to Interference and Noise Ratio), so the receiving end can judge the MCS that it can receive according to the actual measured channel quality, and feed back the corresponding CQI value of the MCS in the CQI index table to the transmitting end, thereby reducing the control signaling overhead of feedback from the receiving end.
通常在移动通信系统中，上述的MIMO技术和AMC技术常常是结合在一起使用的，这样在基于AMC的MIMO方案中，由于SCW模式中各个天线支持的数据传输速率相同，因此接收端只需要反馈一个总的CQI信息即可，这与单路天线下的AMC技术相类似；但是在MCW模式中，不同的天线会采用不同的编码调制方式，各个天线能够支持的数据传输速率也不相同，因此就需要接收端针对每一个发射天线分别反馈相应的CQI信息，因此在基于AMC的MIMO方案中，MCW模式需要接收端反馈更多的控制信令开销，其所需反馈的控制信息量是单天线情况的M倍(M为MIMO系统中包含的发射天线数目)。Usually in mobile communication systems, the above-mentioned MIMO technology and AMC technology are often used together, so in the AMC-based MIMO scheme, since the data transmission rate supported by each antenna in SCW mode is the same, the receiving end only needs to feedback A total CQI information is enough, which is similar to the AMC technology under a single antenna; but in MCW mode, different antennas will use different coding and modulation methods, and the data transmission rates that each antenna can support are also different, so The receiving end needs to feed back the corresponding CQI information for each transmitting antenna. Therefore, in the AMC-based MIMO scheme, the MCW mode requires the receiving end to feed back more control signaling overhead, and the amount of control information required for feedback is a single antenna M times of the case (M is the number of transmit antennas included in the MIMO system).
其中接收端是将CQI信息通过高速下行分组接入(HSPDA，High SpeedPacket Data Access)系统物理层中的高速专用物理控制信道(HS-DPCCH，HighSpeed-Dedicated Physical Control Channel)反馈给发射端的，其中HSPDA是第三代合作项目(3GPP)在Release 5中引入的一种下行无线增强技术，与其相关的HS-DPCCH信道可以用于承载接收端反馈的确认(ACK)/不确认(NACK)信息和CQI信息等。The receiving end feeds back the CQI information to the transmitting end through the high-speed dedicated physical control channel (HS-DPCCH, High Speed-Dedicated Physical Control Channel) in the physical layer of the high-speed downlink packet access (HSPDA, High Speed Packet Data Access) system. It is a downlink wireless enhancement technology introduced by the third generation cooperation project (3GPP) in Release 5. The HS-DPCCH channel related to it can be used to carry the acknowledgment (ACK)/non-acknowledgement (NACK) information and CQI fed back by the receiving end information etc.
如图3所示，为现有HS-DPCCH信道上传输的HS-DPCCH子帧结构示意图，由图3可以看出，一个HS-DPCCH子帧中包含3个时隙，每个时隙可以传输10个信道比特，其中第一个时隙用于传输接收端在混合自动重传请求(HARQ，Hybrid Automatic Repeat request)中反馈的HARQ相关信息，后两个时隙用于传输相关的CQI信息。其中，CQI信息长度为5比特，经过(20，5)编码处理后形成20个比特在HS-DPCCH子帧的后两个时隙上进行传输，接收端反馈的HARQ信息主要包括接收端接收信息成功消息(ACK消息)、接收端接收信息失败消息(NACK消息)、HARQ Preamble消息(PRE消息)、以及HARQ Postamble消息(POST消息)。As shown in Figure 3, it is a schematic diagram of the HS-DPCCH subframe structure transmitted on the existing HS-DPCCH channel. It can be seen from Figure 3 that an HS-DPCCH subframe contains 3 time slots, and each time slot can transmit 10 channel bits, of which the first time slot is used to transmit HARQ-related information fed back by the receiving end in a Hybrid Automatic Repeat request (HARQ, Hybrid Automatic Repeat request), and the last two time slots are used to transmit related CQI information. Among them, the length of the CQI information is 5 bits. After (20, 5) encoding processing, 20 bits are formed and transmitted on the last two time slots of the HS-DPCCH subframe. The HARQ information fed back by the receiving end mainly includes the receiving information received by the receiving end. Success message (ACK message), receiving terminal failure message (NACK message), HARQ Preamble message (PRE message), and HARQ Postamble message (POST message).
当前MIMO技术已经作为一个重要的工作项(WI，Work Item)将在Release7中进行标准化，3GPP的研究报告TR25.876也已经对侯选的MIMO技术方案进行了较为全面的介绍和分析，因此就使得基于AMC的MIMO技术将在移动通信系统中得到广泛应用，但是目前在基于AMC的MCW模式的MIMO技术中需要解决的一个关键问题是如何减少接收端反馈的CQI信息量，从而达到减小接收端反馈控制信令开销的目的。At present, MIMO technology has been standardized in Release7 as an important work item (WI, Work Item). The 3GPP research report TR25.876 has also introduced and analyzed the candidate MIMO technology solutions comprehensively. Therefore, The AMC-based MIMO technology will be widely used in mobile communication systems, but a key problem to be solved in the AMC-based MCW mode MIMO technology is how to reduce the amount of CQI information fed back by the receiving end, so as to reduce the receiving The purpose of terminal feedback control signaling overhead.
发明内容Contents of the invention
本发明要解决的技术问题在于提出一种基于多天线自适应调制编码的信息反馈方法及其装置，以在基于AMC的MCW模式的MIMO技术中减少接收端反馈的信息量，从而减小接收端反馈的控制信令开销。The technical problem to be solved by the present invention is to propose an information feedback method and device based on multi-antenna adaptive modulation and coding, so as to reduce the amount of information fed back by the receiving end in the MIMO technology based on the AMC-MCW mode, thereby reducing the Feedback control signaling overhead.
为解决上述问题，本发明提出的技术方案如下：In order to solve the above problems, the technical scheme proposed by the present invention is as follows:
一种基于多天线自适应调制编码的信息反馈方法，包括步骤：An information feedback method based on multi-antenna adaptive modulation and coding, comprising steps:
针对每一发射天线，接收端按照与发射端预先协定的交错规则，将时域资源划分为基于所述交错规则的第一时域部分和第二时域部分；For each transmitting antenna, the receiving end divides the time domain resource into a first time domain part and a second time domain part based on the interleaving rule according to the interleaving rule pre-agreed with the transmitting end;
接收端分别在各个第一时域部分，将当时需要反馈的自适应调制编码信息反馈给该发射天线；并The receiving end respectively feeds back the adaptive modulation and coding information that needs to be fed back to the transmitting antenna in each first time domain part; and
分别在各个第二时域部分，将当时需要反馈的自适应调制编码信息相对于前面已反馈的自适应调制编码信息的相对信息反馈给该发射天线。In each second time domain part, the relative information of the adaptive modulation and coding information that needs to be fed back at that time relative to the previously fed back adaptive modulation and coding information is fed back to the transmitting antenna.
较佳地，接收端将在各个第一时域部分反馈的自适应调制编码信息和在各个第二时域部分反馈的自适应调制编码相对信息分别通过不同的反向信道反馈给该发射天线。Preferably, the receiving end feeds back the adaptive modulation and coding information fed back in each first time domain part and the adaptive modulation and coding relative information fed back in each second time domain part to the transmitting antenna respectively through different reverse channels.
较佳地，所述交错规则为任意两个第一时域部分之间间隔规定数目个第二时域部分。Preferably, the interleaving rule is that any two first time domain parts are separated by a specified number of second time domain parts.
较佳地，在用于反馈自适应调制编码信息的反向信道上，接收端在各个第二时域部分进行非连续传输处理。Preferably, on the reverse channel for feeding back adaptive modulation and coding information, the receiving end performs discontinuous transmission processing in each second time domain part.
较佳地，在用于反馈自适应调制编码信息的反向信道上，接收端在各个第二时域部分进行反馈当时需要反馈给该发射天线之外的其他发射天线的自适应调制编码信息。Preferably, on the reverse channel for feeding back the adaptive modulation and coding information, the receiving end feeds back the adaptive modulation and coding information that needs to be fed back to other transmitting antennas other than the transmitting antenna at that time in each second time domain part.
较佳地，在用于反馈自适应调制编码相对信息的反向信道上，接收端在各个第一时域部分进行非连续传输处理。Preferably, on the reverse channel for feeding back the relative information of adaptive modulation and coding, the receiving end performs discontinuous transmission processing in each first time domain part.
较佳地，在用于反馈自适应调制编码相对信息的反向信道上，接收端在各个第一时域部分进行反馈当时需要反馈给该发射天线之外的其他发射天线的自适应调制编码相对信息。Preferably, on the reverse channel used to feed back the relative information of adaptive modulation and coding, the receiving end performs feedback in each first time domain part and then needs to feed back the relative information of adaptive modulation and coding to other transmitting antennas other than the transmitting antenna. information.
较佳地，接收端将需要在各个第一时域部分反馈的自适应调制编码信息进行分组编码处理或卷积编码处理后再进行反馈。Preferably, the receiving end needs to perform block coding processing or convolution coding processing on the adaptive modulation coding information fed back by each first time domain part before feeding back.
较佳地，接收端使用两个比特来表征要反馈给各个发射天线的自适应调制编码相对信息。较佳地，接收端使用信道编码1111111111来表征要反馈的自适应调制编码相对信息为+2或-2；并Preferably, the receiving end uses two bits to represent the relative adaptive modulation and coding information to be fed back to each transmitting antenna. Preferably, the receiving end uses channel coding 1111111111 to represent that the adaptive modulation and coding relative information to be fed back is +2 or -2; and
使用信道编码0000000000来表征要反馈的自适应调制编码相对信息为-2或+2；Use channel code 0000000000 to represent that the relative information of adaptive modulation coding to be fed back is -2 or +2;
同时使用信道编码0100100100来表征要反馈的自适应调制编码相对信息为+1或-1；并At the same time, channel coding 0100100100 is used to represent that the relative information of the adaptive modulation coding to be fed back is +1 or -1; and
使用信道编码0010010010来表征要反馈的自适应调制编码相对信息为-1或+1。Channel coding 0010010010 is used to represent that the relative information of adaptive modulation coding to be fed back is -1 or +1.
较佳地，接收端使用一个比特来表征要反馈给各个发射天线的自适应调制编码相对信息。较佳地，接收端使用信道编码1111111111来表征要反馈的自适应调制编码相对信息为+1或-1；并Preferably, the receiving end uses one bit to represent the relative information of the adaptive modulation and coding to be fed back to each transmitting antenna. Preferably, the receiving end uses channel coding 1111111111 to indicate that the relative information of adaptive modulation and coding to be fed back is +1 or -1; and
使用信道编码0000000000来表征要反馈的自适应调制编码相对信息为-1或+1。The channel code 0000000000 is used to represent that the relative information of the adaptive modulation code to be fed back is -1 or +1.
较佳地，接收端在各个第二时域部分，在当时需要反馈给发射天线的自适应调制编码相对信息为零时，进行非连续传输处理。Preferably, the receiving end performs discontinuous transmission processing in each second time domain part when the adaptive modulation and coding relative information that needs to be fed back to the transmitting antenna at that time is zero.
较佳地，接收端针对每一发射天线，在反向信道上的各个第二时域部分始终向该发射天线反馈当时需要反馈的自适应调制编码相对信息。Preferably, for each transmitting antenna, the receiving end always feeds back the adaptive modulation and coding relative information that needs to be fed back at that time in each second time domain part on the reverse channel to the transmitting antenna.
较佳地，接收端针对每一发射天线，在反向信道上的各个第二时域部分分别向该发射天线和其他相应发射天线反馈当时需要反馈的对应自适应调制编码相对信息。Preferably, for each transmitting antenna, the receiving end feeds back corresponding adaptive modulation and coding relative information that needs to be fed back at that time to the transmitting antenna and other corresponding transmitting antennas in each second time domain part on the reverse channel.
较佳地，所述自适应调制编码相对信息指当时需要反馈的自适应调制编码信息相对于前面最近一次已反馈的自适应调制编码信息的信息差值。Preferably, the adaptive modulation and coding relative information refers to an information difference between the adaptive modulation and coding information that needs to be fed back at that time and the previous adaptive modulation and coding information that has been fed back last time.
较佳地，所述自适应调制编码信息为信道质量指示信息。Preferably, the adaptive modulation and coding information is channel quality indication information.
一种基于多天线自适应调制编码的信息反馈装置，包括：An information feedback device based on multi-antenna adaptive modulation and coding, comprising:
时域划分单元，用于针对每一发射天线，接收端按照与发射端预先协定的交错规则，将时域资源划分为基于所述交错规则的第一时域部分和第二时域部分；A time-domain division unit, configured to divide the time-domain resource into a first time-domain part and a second time-domain part based on the interleaving rule, according to the staggering rule pre-agreed by the receiving end and the transmitting end, for each transmitting antenna;
第一反馈单元，用于接收端分别在所述时域划分单元划分出的各个第一时域部分，将当时需要反馈的自适应调制编码信息反馈给对应发射天线；The first feedback unit is used for the receiving end to feed back the adaptive modulation and coding information that needs to be fed back to the corresponding transmitting antenna in each of the first time domain parts divided by the time domain division unit;
第二反馈单元，用于接收端分别在所述时域划分单元划分出的各个第二时域部分，将当时需要反馈的自适应调制编码信息相对于前面已反馈的自适应调制编码信息的相对信息反馈给对应发射天线。The second feedback unit is used for the receiving end to divide the respective second time domain parts divided by the time domain division unit, and compare the adaptive modulation and coding information that needs to be fed back at that time with respect to the previous adaptive modulation and coding information that has been fed back. The information is fed back to the corresponding transmit antenna.
较佳地，所述第一反馈单元和第二反馈单元分别使用不同的反向信道反馈自适应调制编码信息和自适应调制编码相对信息。Preferably, the first feedback unit and the second feedback unit respectively use different reverse channels to feed back adaptive modulation and coding information and adaptive modulation and coding relative information.
一种基于多天线自适应调制编码的信息反馈方法，包括步骤：An information feedback method based on multi-antenna adaptive modulation and coding, comprising steps:
接收端在高速专用物理控制信道的不同传输时间间隔内向不同发射天线反馈当时对应的自适应调制编码信息；并The receiving end feeds back the corresponding adaptive modulation and coding information to different transmit antennas within different transmission time intervals of the high-speed dedicated physical control channel; and
在所述高速专用物理控制信道用于向一个发射天线反馈对应自适应调制编码信息的传输时间间隔内，在第一附加信道上向该发射天线之外的其他相应发射天线反馈当时需要反馈的自适应调制编码信息相对于前面已反馈的自适应调制编码信息的相对信息。During the transmission time interval when the high-speed dedicated physical control channel is used to feed back corresponding adaptive modulation and coding information to a transmitting antenna, the self-adaptive information that needs to be fed back at that time is fed back to other corresponding transmitting antennas other than the transmitting antenna on the first additional channel. The relative information of the adaptive modulation and coding information relative to the previously fed back adaptive modulation and coding information.
较佳地，接收端在所述高速专用物理控制信道的不同传输时间间隔内的后两个时隙中反馈自适应调制编码信息；Preferably, the receiving end feeds back the adaptive modulation and coding information in the last two time slots in different transmission time intervals of the high-speed dedicated physical control channel;
并在所述高速专用物理控制信道的不同传输时间间隔内的第一时隙中反馈相应的混合自动重传请求信息。And feed back corresponding hybrid automatic repeat request information in the first time slots in different transmission time intervals of the high-speed dedicated physical control channel.
较佳地，接收端在所述高速专用物理控制信道上还预留有部分传输时间间隔；并Preferably, the receiving end also reserves a part of the transmission time interval on the high-speed dedicated physical control channel; and
在所述预留的传输时间间隔内的第一时隙中反馈相应的混合自动重传请求信息，并在后两个时隙中进行非连续传输处理。Corresponding HARQ information is fed back in the first time slot within the reserved transmission time interval, and discontinuous transmission processing is performed in the last two time slots.
较佳地，接收端在所述高速专用物理控制信道用于向一个发射天线反馈对应自适应调制编码信息的传输时间间隔内，在所述第一附加信道上始终向该发射天线之外的其他任一发射天线反馈当时需要反馈的自适应调制编码相对信息。Preferably, within the transmission time interval during which the high-speed dedicated physical control channel is used to feed back corresponding adaptive modulation and coding information to a transmitting antenna, the receiving end always transmits information to other channels other than the transmitting antenna on the first additional channel. Any transmitting antenna feeds back the relative information of the adaptive modulation coding that needs to be fed back at that time.
较佳地，接收端在所述高速专用物理控制信道用于向一个发射天线反馈对应自适应调制编码信息的传输时间间隔内，在所述第一附加信道上向该发射天线之外的其他每一发射天线分别反馈当时需要反馈的自适应调制编码相对信息。Preferably, within the transmission time interval when the high-speed dedicated physical control channel is used to feed back corresponding adaptive modulation and coding information to a transmitting antenna, the receiving end transmits information to each other than the transmitting antenna on the first additional channel. A transmitting antenna respectively feeds back the relative information of adaptive modulation and coding that needs to be fed back at that time.
较佳地，接收端在所述高速专用物理控制信道用于向一个发射天线反馈对应自适应调制编码信息的传输时间间隔的第一个时隙内，在所述第一附加信道上进行非连续传输处理。Preferably, in the first time slot of the transmission time interval in which the high-speed dedicated physical control channel is used to feed back corresponding adaptive modulation and coding information to a transmitting antenna, the receiving end performs discontinuous transmission on the first additional channel Transfer processing.
较佳地，接收端在所述高速专用物理控制信道的不同传输时间间隔内的第一时隙中分别向不同发射天线反馈相应的混合自动重传请求信息。Preferably, the receiving end respectively feeds back corresponding HARQ information to different transmitting antennas in the first time slots in different transmission time intervals of the high-speed dedicated physical control channel.
较佳地，接收端在所述高速专用物理控制信道的不同传输时间间隔内的第一时隙中始终向一个发射天线反馈相应的混合自动重传请求信息；并Preferably, the receiving end always feeds back corresponding HARQ information to a transmitting antenna in the first time slots of different transmission time intervals of the high-speed dedicated physical control channel; and
在一个第二附加信道上向该发射天线之外的其他各个发射天线分别反馈相应的混合自动重传请求信息。Corresponding HARQ information is respectively fed back to other transmit antennas other than the transmit antenna on a second additional channel.
较佳地，接收端在该第二附加信道上优先通过每一传输时间间隔的靠前时隙向其他各个发射天线分别反馈相应的混合自动重传请求信息；并Preferably, on the second additional channel, the receiving end feeds back corresponding HARQ information respectively to other transmitting antennas through the first time slot of each transmission time interval; and
在每一传输时间间隔的靠后不使用时隙进行非连续传输处理。No time slots are used for discontinuous transmission processing at the end of each transmission time interval.
较佳地，接收端在所述高速专用物理控制信道的不同传输时间间隔内的第一时隙中始终向一个发射天线反馈相应的混合自动重传请求信息；并Preferably, the receiving end always feeds back corresponding HARQ information to a transmitting antenna in the first time slots of different transmission time intervals of the high-speed dedicated physical control channel; and
将需要反馈给该发射天线之外的其他各个发射天线的混合自动重传请求信息分别通过不同的第二附加信道进行反馈。The hybrid automatic repeat request information that needs to be fed back to other transmitting antennas other than the transmitting antenna is respectively fed back through different second additional channels.
较佳地，接收端将需要反馈给其他各个发射天线的混合自动重传请求信息分别在不同的第二附加信道的每一传输时间间隔内的第一个时隙上进行反馈。Preferably, the receiving end feeds back the HARQ information that needs to be fed back to the other transmitting antennas on the first time slot in each transmission time interval of different second additional channels.
较佳地，所述自适应调制编码相对信息指当时需要反馈的自适应调制编码信息相对于前面最近一次已反馈的自适应调制编码信息的信息差值。Preferably, the adaptive modulation and coding relative information refers to an information difference between the adaptive modulation and coding information that needs to be fed back at that time and the previous adaptive modulation and coding information that has been fed back last time.
较佳地，所述自适应调制编码信息为信道质量指示信息。Preferably, the adaptive modulation and coding information is channel quality indication information.
较佳地，所述混合自动重传请求信息为接收端接收信息成功消息；或为接收端接收信息失败消息；或为HARQ Preamble消息；或为HARQ Postamble消息。Preferably, the hybrid automatic repeat request information is a message that the receiver successfully receives information; or a message that the receiver fails to receive information; or a HARQ Preamble message; or a HARQ Postamble message.
一种基于多天线自适应调制编码的信息反馈装置，包括：An information feedback device based on multi-antenna adaptive modulation and coding, comprising:
第一信息反馈单元，用于接收端在高速专用物理控制信道的不同传输时间间隔内向不同发射天线反馈当时对应的自适应调制编码信息；The first information feedback unit is used for the receiving end to feed back the corresponding adaptive modulation and coding information to different transmitting antennas during different transmission time intervals of the high-speed dedicated physical control channel;
第二信息反馈单元，用于所述第一信息反馈单元在所述高速专用物理控制信道用于向一个发射天线反馈对应自适应调制编码信息的传输时间间隔内，在另外的附加信道上向该发射天线之外的其他相应发射天线反馈当时需要反馈的自适应调制编码信息相对于前面已反馈的自适应调制编码信息的相对信息。The second information feedback unit is used for the first information feedback unit to send the high-speed dedicated physical control channel to a transmitting antenna on another additional channel during the transmission time interval when the high-speed dedicated physical control channel is used to feed back corresponding adaptive modulation and coding information to the transmitting antenna. Other corresponding transmitting antennas other than the transmitting antenna feed back the relative information of the adaptive modulation and coding information that needs to be fed back at that time relative to the previously fed back adaptive modulation and coding information.
本发明能够达到的有益效果如下：The beneficial effect that the present invention can reach is as follows:
本发明技术方案通过接收端按照与发射端预先协定的交错规则，将整个时域资源划分为基于所述交错规则的第一时域部分和第二时域部分，接收端分别在各个第一时域部分，将当时需要反馈的绝对AMC信息反馈给该发射天线，并分别在各个第二时域部分，将当时需要反馈的相对AMC信息反馈给该发射天线，从而通过在不同时间域向同一发射天线反馈绝对AMC信息或相对AMC信息，从而可以减少接收端向各个发射天线反馈AMC信息的信息量，相应的也就减小了接收端反馈的控制信令开销。According to the technical solution of the present invention, the receiving end divides the entire time domain resource into the first time domain part and the second time domain part based on the interleaving rule according to the interleaving rules pre-agreed with the transmitting end, and the receiving end respectively In the domain part, the absolute AMC information that needs to be fed back at that time is fed back to the transmitting antenna, and in each second time domain part, the relative AMC information that needs to be fed back at that time is fed back to the transmitting antenna, thereby transmitting The antenna feeds back the absolute AMC information or the relative AMC information, thereby reducing the amount of information that the receiving end feeds back the AMC information to each transmitting antenna, and correspondingly reduces the control signaling overhead fed back by the receiving end.
附图说明Description of drawings
图1为现有MIMO技术中SCW模式的数据发送处理过程示意图；FIG. 1 is a schematic diagram of a data transmission process in an SCW mode in an existing MIMO technology;
图2为现有MIMO技术中MCW模式的数据发送处理过程示意图；FIG. 2 is a schematic diagram of the data transmission process in the MCW mode in the existing MIMO technology;
图3为现有HS-DPCCH信道上传输的HS-DPCCH子帧结构示意图；FIG. 3 is a schematic diagram of the structure of an HS-DPCCH subframe transmitted on an existing HS-DPCCH channel;
图4为本发明提出的第一种基于多天线AMC的信息反馈方法的主要实现原理流程图；Fig. 4 is the main realization principle flowchart of the first kind of information feedback method based on multi-antenna AMC proposed by the present invention;
图5为本发明方法中将整个时域资源划分为任意两个第一时域部分之间间隔2个第二时域部分的不同时域部分交错状态示意图；Fig. 5 is a schematic diagram of the interleaving state of different time domain parts in which the entire time domain resource is divided into two second time domain parts between any two first time domain parts in the method of the present invention;
图6为基于本发明方法在ACQI反馈信道上的第二时域部分进行DTX传输，并在RCQI反馈信道上的第一时域部分进行DTX传输的信道传输状态示意图；Fig. 6 is a schematic diagram of the channel transmission state of performing DTX transmission on the second time domain part on the ACQI feedback channel based on the method of the present invention, and performing DTX transmission on the first time domain part on the RCQI feedback channel;
图7为基于本发明方法在ACQI反馈信道上的第二时域部分进行传输其他相关发射天线的ACQI信息，并在RCQI反馈信道上的第一时域部分进行传输其他相关天线的RCQI信息的信道传输状态示意图；Fig. 7 is a channel for transmitting ACQI information of other relevant transmit antennas in the second time domain part of the ACQI feedback channel based on the method of the present invention, and transmitting RCQI information of other relevant antennas in the first time domain part of the RCQI feedback channel Schematic diagram of transmission status;
图8为本发明提出的第一种基于多天线AMC的信息反馈装置的具体组成结构框图；Fig. 8 is a specific structural block diagram of the first multi-antenna AMC-based information feedback device proposed by the present invention;
图9为本发明提出的第二种基于多天线AMC的信息反馈方法的主要实现原理流程图；FIG. 9 is a flow chart of the main realization principles of the second multi-antenna AMC-based information feedback method proposed by the present invention;
图10为接收端在HS-DPCCH信道上的不同TTI内反馈不同发射天线的ACQI信息的同时，在部分TTI内进行DTX传输的HS-DPCCH信道状态示意图；FIG. 10 is a schematic diagram of the HS-DPCCH channel status of DTX transmission in some TTIs while the receiving end feeds back ACQI information of different transmit antennas in different TTIs on the HS-DPCCH channel;
图11为接收端在ACQI反馈信道的一个TTI内向一个发射天线反馈ACQI信息的同时，在RCQI反馈信道上向其他任一发射天线始终反馈对应RCQI信息的状态示意图；FIG. 11 is a schematic diagram of a state in which the receiving end feeds back the corresponding RCQI information to any other transmitting antenna on the RCQI feedback channel while feeding back ACQI information to one transmitting antenna within one TTI of the ACQI feedback channel;
图12为接收端在ACQI反馈信道的一个TTI内向一个发射天线反馈ACQI信息的同时，在RCQI反馈信道上分别进行DTX处理及其向其他每个发射天线反馈RCQI信息的状态示意图；FIG. 12 is a schematic diagram of the receiving end performing DTX processing on the RCQI feedback channel and feeding back RCQI information to each of the other transmitting antennas while feeding back ACQI information to one transmit antenna within one TTI of the ACQI feedback channel;
图13为接收端在ACQI反馈信道的一个TTI内向一个发射天线反馈ACQI信息的同时，在RCQI反馈信道上分别向其他每个发射天线反馈RCQI信息的状态示意图；FIG. 13 is a schematic diagram of a state where the receiving end feeds back ACQI information to one transmit antenna within one TTI of the ACQI feedback channel, and feeds back RCQI information to each of the other transmit antennas on the RCQI feedback channel;
图14为接收端在ACQI反馈信道的每个TTI内的第一时隙中始终向第一发射天线反馈ACK信息，在另一HARQ-ACK反馈信道向第二发射天线反馈ACK信息的状态示意图；FIG. 14 is a schematic diagram of a state where the receiving end always feeds back ACK information to the first transmit antenna in the first time slot of each TTI of the ACQI feedback channel, and feeds back ACK information to the second transmit antenna on another HARQ-ACK feedback channel;
图15为接收端在ACQI反馈信道的每个TTI内的第一时隙中始终向第一发射天线反馈ACK信息，在另一HARQ-ACK反馈信道的每个TTI内的第一时隙和第二时隙分别向第二发射天线和第三发射天线反馈ACK信息，并在第三时隙进行DTX传输的状态示意图；Figure 15 shows that the receiving end always feeds back ACK information to the first transmit antenna in the first time slot of each TTI of the ACQI feedback channel, and the first time slot and the second time slot of each TTI of another HARQ-ACK feedback channel A schematic diagram of feeding back ACK information to the second transmit antenna and the third transmit antenna in the second time slot, and performing DTX transmission in the third time slot;
图16为接收端在ACQI反馈信道的每个TTI内的第一时隙中始终向第一发射天线反馈ACK信息，在另一HARQ-ACK反馈信道的每个TTI内的三个时隙中分别向第二、第三、第四发射天线反馈ACK信息的状态示意图；Figure 16 shows that the receiving end always feeds back ACK information to the first transmit antenna in the first time slot of each TTI of the ACQI feedback channel, and respectively in the three time slots of each TTI of another HARQ-ACK feedback channel A schematic diagram of the state of feeding back ACK information to the second, third, and fourth transmit antennas;
图17为接收端在ACQI反馈信道的每个TTI内的第一时隙中始终向第一发射天线反馈ACK信息，在其他每个附加HARQ-ACK反馈信道的每个TTI内的第一时隙中分别向其他发射天线反馈ACK信息的状态示意图；Figure 17 shows that the receiving end always feeds back ACK information to the first transmit antenna in the first time slot of each TTI of the ACQI feedback channel, and in the first time slot of each TTI of each additional HARQ-ACK feedback channel A schematic diagram of the state of feeding back ACK information to other transmit antennas respectively in ;
图18为本发明提出的第二种基于多天线AMC的信息反馈装置的主要组成结构框图。FIG. 18 is a structural block diagram of the main components of the second multi-antenna AMC-based information feedback device proposed by the present invention.
具体实施方式Detailed ways
本发明技术方案主要根据在移动通信系统中的MIMO技术中，当传输时间间隔(TTI，Transmission Time Interval)长度小于信道相关时间时，同一发射天线的相邻TTI之间信道衰落变化差值较小的特点，而提出在基于AMC的MCW模式的MIMO系统中，接收端分别对每根发射天线采用AMC绝对量(指当时需要反馈给发射天线的AMC信息量，如CQI绝对量ACQI，Absolute CQI)和AMC相对量(指当时需要反馈给发射天线的AMC信息量相对于前面已反馈给该发射天线的AMC信息量的差值，如CQI相对量RCQI，Relative CQI)相结合反馈的方法，从而较为有效的减少接收端向MIMO系统中每个发射天线反馈的AMC信息量(如CQI信息量)，并以此来达到减小接收端反馈控制信令开销的目的。The technical scheme of the present invention is mainly based on the fact that in the MIMO technology in the mobile communication system, when the transmission time interval (TTI, Transmission Time Interval) length is less than the channel correlation time, the channel fading variation difference between adjacent TTIs of the same transmitting antenna is small It is proposed that in the MIMO system based on the MCW mode of AMC, the receiving end adopts the absolute amount of AMC for each transmitting antenna (referring to the amount of AMC information that needs to be fed back to the transmitting antenna at that time, such as the absolute amount of CQI ACQI, Absolute CQI) The method of combining the feedback with the relative amount of AMC (referring to the difference between the amount of AMC information that needs to be fed back to the transmitting antenna at that time and the amount of AMC information that has been fed back to the transmitting antenna in the past, such as the relative amount of CQI RCQI, Relative CQI), so as to compare Effectively reduce the amount of AMC information (such as the amount of CQI information) that the receiving end feeds back to each transmit antenna in the MIMO system, and thereby achieve the purpose of reducing the overhead of feedback control signaling at the receiving end.
下面将结合各个附图对本发明技术方案的主要实现原理、具体实施方式及其对应能够达到的有益效果进行详细的阐述。The main realization principles, specific implementation methods and corresponding beneficial effects of the technical solution of the present invention will be described in detail below in conjunction with each accompanying drawing.
请参照图4，该图是本发明提出的第一种基于多天线AMC的信息反馈方法的主要实现原理流程图，其主要实现过程如下：Please refer to Fig. 4, this figure is the main implementation principle flowchart of the first kind of information feedback method based on multi-antenna AMC proposed by the present invention, and its main implementation process is as follows:
步骤S10，针对MIMO系统中的每一发射天线，接收端按照与发射端预先协定的交错规则，将整个时域资源划分为基于该交错规则的第一时域部分和第二时域部分；其中该交错规则可以但不限于为任意两个第一时域部分之间间隔规定数目个第二时域部分，如图5所示，即为本发明方法中将整个时域资源划分为任意两个第一时域部分之间间隔2个第二时域部分的不同时域部分交错状态示意图。Step S10, for each transmitting antenna in the MIMO system, the receiving end divides the entire time domain resource into a first time domain part and a second time domain part based on the interleaving rule according to the interleaving rule pre-agreed with the transmitting end; wherein The interleaving rule can be, but not limited to, a specified number of second time domain parts for the interval between any two first time domain parts, as shown in Figure 5, that is, the entire time domain resource is divided into any two A schematic diagram of the interleaving state of different time domain parts separated by 2 second time domain parts between the first time domain parts.
步骤S20，接收端分别在上述划分出的各个第一时域部分，分别将当时需要反馈的AMC信息(较佳地可以为用于索引收发双方保存的CQI索引表的CQI信息，下述简称“绝对CQI信息”)反馈给该发射天线；In step S20, the receiving end, in each of the first time domain parts divided above, respectively sends the AMC information that needs to be fed back at that time (preferably, it can be used to index the CQI information of the CQI index table saved by both the sending and receiving parties, hereinafter referred to as " Absolute CQI information") is fed back to the transmit antenna;
步骤S30，接收端分别在上述划分出的各个第二时域部分，将当时需要反馈的AMC信息相对于前面已反馈的AMC信息的相对信息(如CQI相对信息，下述简称“相对CQI信息”)反馈给该发射天线；Step S30, the receiving end, in each of the above-mentioned divided second time domain parts, compares the relative information of the AMC information that needs to be fed back at that time relative to the AMC information that has been fed back (such as CQI relative information, hereinafter referred to as "relative CQI information") ) is fed back to the transmitting antenna;
具体地，这里的AMC相对信息可以但不限于为当时需要反馈的AMC信息相对于前面最近一次已反馈的AMC信息的信息差值，该AMC相对信息可以使用1个比特或者2个比特来进行表征，以减少接收端向发射天线反馈AMC相对信息相对于直接反馈AMC信息的信息反馈量，后续相应部分将对AMC相对信息及其传输过程给予具体说明。Specifically, the relative AMC information here may be, but not limited to, the information difference between the AMC information that needs to be fed back at that time and the AMC information that has been fed back last time, and the relative AMC information may be represented by 1 bit or 2 bits , in order to reduce the amount of information feedback that the receiving end feeds back the AMC relative information to the transmitting antenna relative to the direct feedback of the AMC information. The subsequent corresponding sections will give specific instructions on the AMC relative information and its transmission process.
较佳地，接收端可以将在上述划分出的各个第一时域部分反馈的AMC信息和在各个第二时域部分反馈的AMC相对信息分别通过不同的反向信道反馈给该发射天线，如接收端在向同一发射天线反馈CQI信息的过程中，可以将在不同时域上反馈的绝对CQI信息ACQI和相对CQI信息RCQI采用分离的反向信道进行反馈传输。Preferably, the receiving end can feed back the AMC information fed back in each of the above-mentioned divided first time domain parts and the AMC relative information fed back in each second time domain part respectively to the transmitting antenna through different reverse channels, such as During the process of feeding back the CQI information to the same transmit antenna, the receiving end may use separate reverse channels for feedback transmission of the absolute CQI information ACQI and the relative CQI information RCQI fed back in different time domains.
其中当接收端将AMC信息和AMC相对信息分别通过不同的反向信道反馈给该发射天线时，在用于反馈AMC信息的反向信道上，接收端可以在各个第二时域部分进行非连续传输(DTX，Discontinuous Transmission)处理，即在第二时域部分不进行任何信息的反馈传输，还可以在各个第二时域部分进行反馈当时需要反馈给该发射天线之外的其他发射天线的AMC信息。并且在用于反馈AMC相对信息的反向信道上，接收端可以在各个第一时域部分进行DTX传输处理，还可以在各个第一时域部分进行反馈当时需要反馈给该发射天线之外的其他发射天线的AMC相对信息。Wherein, when the receiving end feeds back the AMC information and the AMC relative information to the transmitting antenna through different reverse channels, on the reverse channel used to feed back the AMC information, the receiving end can perform discontinuous Transmission (DTX, Discontinuous Transmission) processing, that is, no feedback transmission of any information is performed in the second time domain part, and feedback can also be performed in each second time domain part. At that time, it needs to be fed back to the AMC of other transmitting antennas other than the transmitting antenna. information. And on the reverse channel used to feed back the AMC relative information, the receiving end can perform DTX transmission processing in each first time domain part, and can also perform feedback in each first time domain part. AMC relative information for other transmit antennas.
如图6所示，为基于本发明方法在ACQI反馈信道上的第二时域部分进行DTX传输，并在RCQI反馈信道上的第一时域部分进行DTX传输的信道传输状态示意图。As shown in FIG. 6 , it is a schematic diagram of the channel transmission state of performing DTX transmission in the second time domain part on the ACQI feedback channel and performing DTX transmission in the first time domain part on the RCQI feedback channel based on the method of the present invention.
如图7所示，为基于本发明方法在ACQI反馈信道上的第二时域部分进行传输其他相关发射天线的ACQI信息，并在RCQI反馈信道上的第一时域部分进行传输其他相关天线的RCQI信息的信道传输状态示意图。As shown in Fig. 7, it is based on the method of the present invention to transmit the ACQI information of other relevant transmit antennas in the second time domain part on the ACQI feedback channel, and transmit the information of other relevant antennas in the first time domain part on the RCQI feedback channel Schematic diagram of channel transmission status of RCQI information.
其中接收端在各个第一时域部分将相应AMC信息通过反馈信道反馈给对应发射天线之前，接收端可以对相应的AMC信息进行分组编码处理或卷积编码处理后再进行反馈，如对预反馈给相应发射天线的ACQI信息先采用分组编码处理或卷积编码处理后再映射到反向物理信道上进行传输。Wherein, before the receiving end feeds back the corresponding AMC information to the corresponding transmitting antenna through the feedback channel in each first time domain part, the receiving end may perform block coding processing or convolution coding processing on the corresponding AMC information and then perform feedback, such as pre-feedback The ACQI information for the corresponding transmit antenna is first processed by block coding or convolution coding and then mapped to the reverse physical channel for transmission.
根据本发明方法上述原理，接收端对每根发射天线反馈的ACQI信息不是在每个TTI上连续反馈传输的，而是以一定的反馈周期(一个ACQI反馈周期包括一个以上的TTI)进行反馈传输的。对于对应某发射天线的一个ACQI反馈周期，除了能够反馈该发射天线的ACQI信息以外，还可以在该反馈周期的其它TTI上，来反馈传输对应其它发射天线的ACQI信息，否则在该反馈周期的其他TTI上采用DTX传输，即在这些相应TTI内不发射任何信号。According to the above principles of the method of the present invention, the ACQI information fed back by the receiving end to each transmit antenna is not continuously fed back and transmitted on each TTI, but is fed back and transmitted with a certain feedback cycle (one ACQI feedback cycle includes more than one TTI) of. For an ACQI feedback cycle corresponding to a certain transmit antenna, in addition to being able to feed back the ACQI information of the transmit antenna, it is also possible to feed back and transmit the ACQI information corresponding to other transmit antennas in other TTIs of the feedback cycle; DTX transmission is used on other TTIs, ie no signal is transmitted during these corresponding TTIs.
其中，对应于不同发射天线的ACQI反馈周期定时图案(Timing Pattern)是系统预先配置的，因此收发双方能够根据该定时图案正确的发送和接收各发射天线的ACQI信息，如一个ACQI反馈周期定时图案实施例如下：Among them, the ACQI feedback cycle timing pattern (Timing Pattern) corresponding to different transmit antennas is pre-configured by the system, so the sending and receiving parties can correctly send and receive the ACQI information of each transmit antenna according to the timing pattern, such as an ACQI feedback cycle timing pattern Examples are as follows:
以发射天线数目M＝4的ACQI信息反馈为例，可以在第1，5，9…个TTI内来反馈传输对应第1发射天线的ACQI信息，同时在第2，6，10…个TTI内来反馈传输对应第2发射天线的ACQI信息，同时在第3，7，11…个TTI内来反馈传输对应第3天线的ACQI信息，并同时在第4，8，12…个TTI内来反馈传输对应第4天线的ACQI信息。Taking the ACQI information feedback with the number of transmit antennas M=4 as an example, the ACQI information corresponding to the first transmit antenna can be fed back and transmitted in the 1st, 5th, 9th... TTIs, and at the same time in the 2nd, 6th, 10th... TTIs To feed back and transmit the ACQI information corresponding to the second transmit antenna, and at the same time to feed back and transmit the ACQI information corresponding to the third antenna in the 3rd, 7th, 11th TTI, and at the same time to feed back in the 4th, 8th, 12th TTI ACQI information corresponding to the 4th antenna is transmitted.
上述已阐述，接收端可以使用1个比特或者2个比特来表征要反馈给各个发射天线的AMC相对信息，如可以采用1个或2个比特来表示要反馈给各个发射天线的RCQI信息，由于用于传输RCQI信息的信道扩频因子(SF)为256，即每个时隙可传输10个物理信道比特，因此可以基于一个时隙的10个物理信道比特来传输一个RCQI信息值。典型的，如对使用2个比特来表示RCQI信息的情况，可以使用“1111111111”和“0000000000”来分别表示+2和-2(或分别表示-2和+2)，并使用“0100100100”和“0010010010”来分别表示+1和-1(或分别表示-1和+1)，具体如下表1所示；对使用1个比特来表示RCQI信息的情况，可以使用“1111111111”和“0000000000”来分别表示+1和-1(或分别表示-1和+1)，具体如下表2所示，这样可以减小接收端的反馈信息量，并降低传输过程中出现的误码率。As explained above, the receiving end can use 1 bit or 2 bits to represent the AMC relative information to be fed back to each transmit antenna, for example, 1 or 2 bits can be used to represent the RCQI information to be fed back to each transmit antenna, because The channel spreading factor (SF) used to transmit RCQI information is 256, that is, each time slot can transmit 10 physical channel bits, so one RCQI information value can be transmitted based on 10 physical channel bits in one time slot. Typically, if 2 bits are used to represent RCQI information, "1111111111" and "0000000000" can be used to represent +2 and -2 (or -2 and +2 respectively), and "0100100100" and "0010010010" to represent +1 and -1 (or respectively represent -1 and +1), as shown in Table 1 below; for the case of using 1 bit to represent RCQI information, you can use "1111111111" and "0000000000" to represent +1 and -1 (or respectively represent -1 and +1), as shown in Table 2 below, which can reduce the amount of feedback information at the receiving end and reduce the bit error rate during transmission.
表1：使用2个比特表示RCQI信息时的编码表
表2：使用1个比特表示RCQI信息时的编码表
同时由上表1和2也可以看出，接收端可以在各个第二时域部分，在当时需要反馈给对应发射天线的AMC相对信息为0时，采用非连续传输进行处理，具体的，如接收端要反馈给对应发射天线的RCQI＝0时，即表明当前TTI将反馈的RCQI信息与上一TTI反馈的RCQI信息完全相同，因此在当前TTI可以基于DTX来表示，发射天线所在的Node B可以采用能量检测方式来判断相应时隙内的RCQI反馈信道是否为DTX形式，其中，该能量检测方式是指NodeB将该时隙内的RCQI反馈信道上的接收信号能量与一规定的判决门限值进行比较，若RCQI反馈信道上的接收信号能量小于该判决门限则值则可以判定RCQI反馈信道上该时隙内传输形式为DTX，这样又进一步减少了接收端的反馈信息量。At the same time, it can also be seen from the above tables 1 and 2 that the receiving end can use discontinuous transmission for processing when the AMC relative information that needs to be fed back to the corresponding transmitting antenna is 0 in each second time domain part, specifically, as When the receiving end wants to feed back RCQI=0 to the corresponding transmitting antenna, it means that the RCQI information fed back by the current TTI is exactly the same as the RCQI information fed back by the previous TTI. Therefore, the current TTI can be expressed based on DTX, and the Node B where the transmitting antenna is located An energy detection method can be used to determine whether the RCQI feedback channel in the corresponding time slot is in the form of DTX, wherein the energy detection method means that the NodeB compares the received signal energy on the RCQI feedback channel in the time slot with a specified decision threshold If the received signal energy on the RCQI feedback channel is less than the decision threshold, it can be determined that the transmission form in the time slot on the RCQI feedback channel is DTX, which further reduces the amount of feedback information at the receiving end.
其中接收端在用于向一个发射天线反馈AMC相对信息的反向信道上，可以在各个第二时域部分始终向该发射天线分别反馈当时需要反馈的AMC相对信息，还可以在各个第二时域部分分别向该发射天线和其他相应发射天线分别反馈当时需要反馈的AMC相对信息。如假设一个第二时域部分的长度为一个TTI长度，则在用于反馈RCQI信息的反向信道上，可以在用于反馈RCQI信息的一个TTI内的多个时隙中始终反馈同一个RCQI信息值，即该TTI内的所有用于传输该RCQI信息值的时隙均相同，也就是说将其中一个时隙中的RCQI信息的编码在这些用于传输该RCQI信息值的时隙中进行重复，同时根据本发明方法原理，在ACQI反馈周期定时图案(Timing Pattern)所给出的用于反馈一发射天线的ACQI信息的TTI内，不能反馈传输该发射天线的RCQI信息值。Wherein the receiving end is used to feed back the AMC relative information to a transmit antenna on the reverse channel, and can always feed back the AMC relative information that needs to be fed back at that time to the transmit antenna in each second time domain part, and can also be in each second time domain The domain part respectively feeds back the AMC relative information that needs to be fed back at that time to the transmit antenna and other corresponding transmit antennas. Assuming that the length of a second time domain part is one TTI length, on the reverse channel used to feed back RCQI information, the same RCQI can always be fed back in multiple time slots within one TTI used to feed back RCQI information The information value, that is, all the time slots used to transmit the RCQI information value in the TTI are the same, that is to say, the encoding of the RCQI information in one of the time slots is performed in these time slots used to transmit the RCQI information value Repeat, while according to the principle of the method of the present invention, within the TTI for feeding back the ACQI information of a transmit antenna given by the ACQI feedback cycle timing pattern (Timing Pattern), the RCQI information value of the transmit antenna cannot be fed back and transmitted.
相应于本发明上述提出的第一种基于多天线AMC的信息反馈方法，本发明这里还进而提出了一种基于多天线AMC的信息反馈装置，该装置可以安置于移动通信系统中的移动用户终端内，用于向发射端反馈相应的AMC信息(具体的如CQI信息等)。请参照图8，该图是本发明提出的第一种基于多天线AMC的信息反馈装置的具体组成结构框图，其主要包括时域划分单元10、第一反馈单元20和第二反馈单元30，其中各个组成单元的具体作用如下：Corresponding to the first multi-antenna AMC-based information feedback method proposed above in the present invention, the present invention further proposes a multi-antenna AMC-based information feedback device, which can be placed in a mobile user terminal in a mobile communication system Inside, it is used to feed back corresponding AMC information (specifically, CQI information, etc.) to the transmitting end. Please refer to FIG. 8 , which is a specific structural block diagram of the first multi-antenna AMC-based information feedback device proposed by the present invention, which mainly includes a time
时域划分单元10，主要用于针对每一发射天线，接收端按照与发射端预先协定的交错规则，将整个时域资源划分为基于该交错规则的第一时域部分和第二时域部分；The time
第一反馈单元20，主要用于接收端分别在上述时域划分单元10划分出的各个第一时域部分，分别将当时需要反馈的AMC信息(典型的可以为CQI信息)反馈给对应发射天线；The
第二反馈单元30，主要用于接收端分别在上述时域划分单元10划分出的各个第二时域部分，分别将当时需要反馈的AMC信息相对于前面已反馈的AMC信息的相对信息反馈给对应发射天线。The
其中上述的第一反馈单元20和第二反馈单元30可以分别使用不同的反向信道来反馈AMC信息和AMC相对信息，即对应每一发射天线，接收端是通过不同的反向信道将AMC信息和AMC相对信息反馈给对应发射天线的。Wherein the above-mentioned
其中这里提出的基于多天线AMC的信息反馈装置的其他具体相关技术实现细节请参照上述本发明提出的第一种方法中的相关技术实现细节的描述，这里就不再给予过多赘述。For other specific related technical implementation details of the multi-antenna AMC-based information feedback device proposed here, please refer to the description of related technical implementation details in the above-mentioned first method proposed by the present invention, and no more details will be given here.
这里将本发明上述提出的第一种方法具体应用在WCDMA移动通信系统中的HS-DPCCH信道上，又可以衍生出本发明这里提出的第二种基于多天线AMC的信息反馈方法，请参照图9，该图是本发明提出的第二种基于多天线AMC的信息反馈方法的主要实现原理流程图，其主要实现过程如下：Here, the first method proposed by the present invention is specifically applied to the HS-DPCCH channel in the WCDMA mobile communication system, and the second multi-antenna AMC-based information feedback method proposed by the present invention can be derived. Please refer to the figure 9. This figure is a flow chart of the main realization principles of the second multi-antenna AMC-based information feedback method proposed by the present invention, and its main realization process is as follows:
步骤S100，接收端在高速专用物理控制信道(HS-DPCCH)的不同传输时间间隔(TTI)内向不同发射天线反馈当时对应的AMC信息(典型的可以为CQI信息，并这里将当时反馈的AMC信息简称为绝对AMC信息，对应的CQI信息下述也简称为绝对CQI信息—ACQI信息)；Step S100, the receiving end feeds back the corresponding AMC information (typically CQI information) to different transmit antennas in different transmission time intervals (TTIs) of the high-speed dedicated physical control channel (HS-DPCCH). It is referred to as absolute AMC information for short, and the corresponding CQI information is also referred to as absolute CQI information—ACQI information for short below);
步骤S200，同时，接收端在上述HS-DPCCH信道用于向一个发射天线反馈对应AMC信息的TTI内，在第一附加信道(该第一附加信道和该HS-DPCCH信道在物理上为两个不同的信道)上向该发射天线之外的其他相应发射天线反馈当时需要反馈的AMC信息相对于前面已反馈的AMC信息的相对信息，其中这里的AMC相对信息可以但不限于为当时需要反馈的AMC信息相对于前面最近一次已反馈的AMC信息的信息差值，下述可以将AMC相对信息简称为相对AMC信息，具体的下述也将CQI相对信息简称为相对CQI信息—RCQI信息。Step S200, at the same time, in the TTI that the above-mentioned HS-DPCCH channel is used to feed back the corresponding AMC information to a transmitting antenna, the receiving end uses the first additional channel (the first additional channel and the HS-DPCCH channel are physically two different channels) to feed back the relative information of the AMC information that needs to be fed back at that time to the AMC information that has been fed back to other corresponding transmitting antennas other than the transmitting antenna, where the relative AMC information here can be but not limited to the AMC information that needs to be fed back at that time For the information difference between the AMC information and the latest AMC information that has been fed back before, the relative AMC information may be referred to as relative AMC information for short below, and the relative CQI information may also be referred to as relative CQI information—RCQI information for short below.
根据上述发明方法原理，如在HS-DPCCH信道上，在第一个TTI内向第1个发射天线反馈当时需要反馈给该第1个发射天线的ACQI信息，在第二个TTI内向第2个发射天线反馈当时需要反馈给该第2个发射天线的ACQI信息，在第三个TTI内向第3个发射天线反馈当时需要反馈给该第3个发射天线的ACQI信息……以此类推。同时在一个第一附加信道上，在第一个TTI内可以向第2、第3发射天线反馈当时需要反馈该第2、第3天线的RCQI信息，在第二个TTI内向第1、第3发射天线反馈当时需要反馈给第1、第3发射天线的RCQI信息，在第三个TTI内向第1、第2发射天线反馈当时需要反馈给第1、第2发射天线的RCQI信息，以此类推……。According to the principle of the above-mentioned inventive method, for example, on the HS-DPCCH channel, the ACQI information that needs to be fed back to the first transmit antenna at that time is fed back to the first transmit antenna in the first TTI, and the ACQI information that needs to be fed back to the first transmit antenna is fed back to the second transmit antenna in the second TTI. The antenna feeds back the ACQI information that needs to be fed back to the second transmit antenna at that time, and feeds back the ACQI information that needs to be fed back to the third transmit antenna at that time to the third transmit antenna within the third TTI...and so on. At the same time, on a first additional channel, the RCQI information that needs to be fed back to the second and third antennas can be fed back to the second and third transmit antennas in the first TTI, and the RCQI information that needs to be fed back to the second and third antennas can be fed back to the first and third transmit antennas in the second TTI. The transmitting antenna feeds back the RCQI information that needs to be fed back to the first and third transmitting antennas at that time, and feeds back the RCQI information that needs to be fed back to the first and second transmitting antennas to the first and second transmitting antennas in the third TTI, and so on ....
为了能够应用本发明方法原理，并对现有HS-DPCCH信道的信道结构进行尽可能小的改动，这里接收端优选在HS-DPCCH的不同TTI内的后两个时隙中向不同发射天线进行反馈相应的AMC信息，并保持现有技术在不同TTI内的第一时隙中向相应发射天线反馈相应的混合自动重传请求信息(HARQ信息)，其中接收端反馈的HARQ信息主要包括接收端接收信息成功消息(ACK消息)和接收端接收信息失败消息(NACK消息)，还可以为HARQ Preamble消息(PRE消息)或HARQ Postamble消息(POST消息)。In order to be able to apply the principle of the method of the present invention, and to make as little change as possible to the channel structure of the existing HS-DPCCH channel, here the receiving end preferably transmits to different transmit antennas in the last two time slots in different TTIs of the HS-DPCCH Feedback the corresponding AMC information, and maintain the existing technology to feed back the corresponding hybrid automatic repeat request information (HARQ information) to the corresponding transmitting antenna in the first time slot in different TTIs, wherein the HARQ information fed back by the receiving end mainly includes the receiving end The information success message (ACK message) and the failure message (NACK message) received by the receiving end may also be a HARQ Preamble message (PRE message) or a HARQ Postamble message (POST message).
例如，为了简化HARQ重传机制，本发明这里要求接收端采用统一的HARQ重传机制，即接收端UE在HS-DPCCH上的每个TTI内只反馈一个ACK/NACK信号(在每个TTI内的第一时隙上反馈)，发射端NodeB在接收到NACK信号后将自动重传对应TTI内的所有传输块；同时将原来用于向发射天线反馈CQI信息的每个TTI内的后两个时隙用于向发射天线反馈相应的ACQI信息。For example, in order to simplify the HARQ retransmission mechanism, the present invention requires the receiving end to adopt a unified HARQ retransmission mechanism, that is, the receiving end UE only feeds back one ACK/NACK signal in each TTI on the HS-DPCCH (in each TTI Feedback on the first time slot), the NodeB at the transmitting end will automatically retransmit all transport blocks in the corresponding TTI after receiving the NACK signal; at the same time, the last two transport blocks in each TTI that were originally used to feed back CQI information to the transmitting antenna The slots are used to feed back the corresponding ACQI information to the transmit antennas.
其中接收端在HS-DPCCH信道上的不同TTI内向不同发射天线反馈相应AMC信息的同时，还可以在该HS-DPCCH信道上预留部分TTI，并在这些预留的TTI内的第一时隙中反馈相应的HARQ信息，同时在后两个时隙中进行DTX传输处理。具体如图10所示，为接收端在HS-DPCCH信道上的不同TTI内反馈不同发射天线的ACQI信息的同时，在部分TTI内进行DTX传输的HS-DPCCH信道状态示意图，即在HS-DPCCH信道上的某些TTI内不反馈ACQI信息，而采用DTX传输处理，这样可以降低先后向同一发射天线反馈ACQI信息的更新速率，相应的就会增大对应所有发射天线的ACQI报告周期。由于实际上，移动通信系统中的MIMO技术主要是多应用于中低速环境，典型的情况如室内应用，由于中低速环境下的信道衰落变化很小，所以这时如果采用在HS-DPCCH信道上进行ACQI信息反馈的同时，在某些时隙上还进行DTX传输可以使得在满足通信性能的同时大大降低每个TTI内平均反馈的CQI信息量。如前所述，ACQI信息的反馈采用了收发双方已知的ACQI报告周期定时图案，因此在HS-DPCCH信道上的哪些TTI进行了DTX传输，Node B是能够确定的，无需进行其他的检测处理。While the receiving end feeds back the corresponding AMC information to different transmit antennas in different TTIs on the HS-DPCCH channel, it can also reserve some TTIs on the HS-DPCCH channel, and in the first time slot in these reserved TTIs Corresponding HARQ information is fed back in the time slot, and DTX transmission processing is performed in the last two time slots at the same time. Specifically, as shown in Figure 10, it is a schematic diagram of the HS-DPCCH channel state for DTX transmission in some TTIs while the receiving end feeds back the ACQI information of different transmit antennas in different TTIs on the HS-DPCCH channel, that is, the HS-DPCCH Some TTIs on the channel do not feed back ACQI information, but use DTX transmission processing, which can reduce the update rate of ACQI information fed back to the same transmit antenna, and correspondingly increase the ACQI report period corresponding to all transmit antennas. In fact, MIMO technology in mobile communication systems is mainly used in medium and low-speed environments. Typical cases are indoor applications. Since channel fading changes little in medium and low-speed environments, if it is used on the HS-DPCCH channel While performing ACQI information feedback, performing DTX transmission on certain time slots can greatly reduce the average amount of CQI information fed back in each TTI while satisfying communication performance. As mentioned above, the feedback of ACQI information adopts the ACQI report cycle timing pattern known by both the sender and receiver, so the Node B can determine which TTIs on the HS-DPCCH channel are used for DTX transmission, and no other detection processing is required .
较佳的，接收端在HS-DPCCH信道用于向一个发射天线反馈对应AMC信息的TTI内，可以在第一附加信道上始终向该发射天线之外的其他任一个发射天线反馈当时需要反馈的AMC相对信息。具体如图11所示，为接收端在ACQI反馈信道的一个TTI内向一个发射天线反馈ACQI信息的同时，在RCQI反馈信道上向其他任一发射天线始终反馈对应RCQI信息的状态示意图；图中ACQI报告周期在发射天线数目M＝2，3，4时分别为2，3，4个TTI。这里将另外新引入的用于向发射天线反馈RCQI信息的反馈信息称之为RCQI反馈信道(定义为HS-RCQICH信道)，对于M＝2的情况，在ACQI反馈信道上用于向一根发射天线反馈ACQI信息的TTI内则在RCQI反馈信道上向另外一根发射天线反馈RCQI信息，并对应一个发射天线的RCQI信息在RCQI反馈信道的一个TTI内的3个时隙中重复3次。Preferably, within the TTI that the receiving end is used to feed back corresponding AMC information to a transmit antenna on the HS-DPCCH channel, it can always feed back information that needs to be fed back to any other transmit antenna other than the transmit antenna on the first additional channel. AMC relative information. Specifically, as shown in Figure 11, it is a schematic diagram of the state in which the receiving end feeds back the corresponding RCQI information to any other transmitting antenna on the RCQI feedback channel while feeding back ACQI information to one transmitting antenna within one TTI of the ACQI feedback channel; the ACQI in the figure The reporting periods are 2, 3, and 4 TTIs when the number of transmitting antennas M=2, 3, and 4, respectively. Here, the newly introduced feedback information for feeding back RCQI information to the transmitting antenna is called the RCQI feedback channel (defined as the HS-RCQICH channel). For the case of M=2, it is used on the ACQI feedback channel to send an In the TTI when the antenna feeds back the ACQI information, the RCQI information is fed back to another transmit antenna on the RCQI feedback channel, and the RCQI information corresponding to one transmit antenna is repeated 3 times in 3 time slots in one TTI of the RCQI feedback channel.
较佳的，接收端在HS-DPCCH信道用于向一个发射天线反馈对应AMC信息的TTI内，也可以在第一附加信道上向该发射天线之外的其他每一发射天线分别反馈当时需要反馈的AMC相对信息，同时接收端还可以在HS-DPCCH信道用于向一个发射天线反馈对应AMC信息的TTI内的第一个时隙中，在第一附加信道上进行DTX传输处理。Preferably, the receiving end uses the HS-DPCCH channel to feed back the corresponding AMC information to a transmitting antenna within the TTI, and can also separately feed back the feedback required at that time to each other transmitting antenna other than the transmitting antenna on the first additional channel. At the same time, the receiving end can also perform DTX transmission processing on the first additional channel in the first time slot in the TTI where the HS-DPCCH channel is used to feed back the corresponding AMC information to a transmitting antenna.
具体的如图12所示，为接收端在ACQI反馈信道的一个TTI内向一个发射天线反馈ACQI信息的同时，在RCQI反馈信道上分别进行DTX处理及其向其他每个发射天线反馈RCQI信息的状态示意图，图中所示对应于发射天线数目M＝3的情况，在ACQI反馈信道上用于向一根发射天线反馈ACQI信息的TTI内，在RCQI反馈信道上分别向另外2根发射天线反馈RCQI信息，其中一个不使用的时隙采用DTX传输处理，该DTX传输可以由系统预先配置，以使不需要发射端Node B进行检测。Specifically, as shown in Figure 12, the receiving end feeds back ACQI information to one transmit antenna within one TTI of the ACQI feedback channel, and at the same time performs DTX processing on the RCQI feedback channel and feeds back RCQI information to each of the other transmit antennas. Schematic diagram, shown in the figure corresponds to the case where the number of transmit antennas is M=3, in the TTI used to feed back ACQI information to one transmit antenna on the ACQI feedback channel, feed back RCQI to the other two transmit antennas on the RCQI feedback channel Information, one of the unused time slots is processed by DTX transmission, which can be pre-configured by the system so that the Node B at the transmitting end is not required to perform detection.
如图13所示，为接收端在ACQI反馈信道的一个TTI内向一个发射天线反馈ACQI信息的同时，在RCQI反馈信道上分别向其他每个发射天线反馈RCQI信息的状态示意图，图中所示对应发射天线数目M＝4的情况，在ACQI反馈信道上用于向一根发射天线反馈ACQI信息的TTI内，在RCQI反馈信道上分别向另外3根发射天线反馈RCQI信息。As shown in Figure 13, it is a schematic diagram of the receiving end feeding back ACQI information to one transmitting antenna within one TTI of the ACQI feedback channel, and at the same time feeding back RCQI information to each other transmitting antenna on the RCQI feedback channel. In the case where the number of transmit antennas is M=4, within the TTI used to feed back ACQI information to one transmit antenna on the ACQI feedback channel, feed back RCQI information to the other three transmit antennas on the RCQI feedback channel.
对于现有技术中HS-DPCCH信道中的HARQ信息反馈，本发明结合上述传输ACQI信息和RCQI信息的方式，提出了如下几种具体反馈方式：For the HARQ information feedback in the HS-DPCCH channel in the prior art, the present invention proposes the following several specific feedback methods in combination with the above-mentioned manners of transmitting ACQI information and RCQI information:
第一种：接收端在HS-DPCCH信道的不同TTI内的第一时隙中分别向不同发射天线反馈相应的HARQ信息，具体如上述图10、图11、图12和图13中HARQ信息的反馈方式。The first type: the receiving end feeds back the corresponding HARQ information to different transmit antennas in the first time slots of different TTIs of the HS-DPCCH channel, specifically as the above-mentioned HARQ information in Figure 10, Figure 11, Figure 12 and Figure 13 Feedback method.
第二种：接收端在HS-DPCCH信道的不同TTI内的第一时隙中可以始终向一个发射天线反馈相应的HARQ信息，并在一个第二附加信道上向该发射天线之外的其他各个发射天线分别反馈相应的HARQ信息。具体的如图14所示，为接收端在ACQI反馈信道的每个TTI内的第一时隙中始终向第一发射天线反馈ACK信息，在另一HARQ-ACK反馈信道向第二发射天线反馈ACK信息的状态示意图，其中接收端在该第二附加信道上可以优先通过每一TTI的靠前时隙部分向其他各个发射天线分别反馈相应的HARQ信息，并在每一TTI的靠后不使用时隙部分进行DTX传输处理，如在图14中，在另一HARQ-ACK反馈信道中分别在每一TTI内的第一时隙中向第二发射天线反馈ACK信息，并在每一TTI内的后两个时隙中进行DTX传输处理。The second type: the receiving end can always feed back the corresponding HARQ information to a transmit antenna in the first time slot in different TTIs of the HS-DPCCH channel, and send the corresponding HARQ information to each other than the transmit antenna on a second additional channel The transmitting antennas respectively feed back corresponding HARQ information. Specifically, as shown in Figure 14, the receiving end always feeds back ACK information to the first transmit antenna in the first time slot of each TTI of the ACQI feedback channel, and feeds back ACK information to the second transmit antenna in another HARQ-ACK feedback channel. Schematic diagram of the state of ACK information, in which the receiving end can preferentially feed back the corresponding HARQ information to other transmit antennas through the first time slot part of each TTI on the second additional channel, and not use it at the end of each TTI The time slot part performs DTX transmission processing. As shown in Figure 14, in another HARQ-ACK feedback channel, the ACK information is fed back to the second transmit antenna in the first time slot in each TTI respectively, and in each TTI The DTX transmission process is performed in the last two time slots of the time slot.
上述第二种HARQ信息的反馈方式原理即为除了使用当前协议的HS-DPCCH信道的每一TTI内的第一时隙来反馈一根天线的HARQ-ACK信息之外，还为其它天线另外分配一个(或者多个)HARQ-ACK反馈信道(可以称之为HS-ACKCH信道)，该分配的HARQ-ACK反馈信道的SF＝256，其上每个TTI内的3个时隙分别用于向不同发射天线反馈对应的HARQ-ACK信息，而每个时隙的信道结构与当前协议的HS-DPCCH信道的用于反馈HARQ-ACK信息的每个TTI内的第一个时隙的信道结构完全相同，当一个额外分配的HARQ-ACK反馈信道的某些时隙不使用时，可以进行DTX传输处理。The principle of the above-mentioned second HARQ information feedback method is that in addition to using the first time slot in each TTI of the HS-DPCCH channel of the current protocol to feed back the HARQ-ACK information of one antenna, it also allocates additional data for other antennas. One (or more) HARQ-ACK feedback channels (may be referred to as HS-ACKCH channels), the allocated HARQ-ACK feedback channel has SF=256, and the 3 time slots in each TTI are used to send The corresponding HARQ-ACK information is fed back by different transmit antennas, and the channel structure of each time slot is exactly the same as the channel structure of the first time slot in each TTI used to feed back HARQ-ACK information in the HS-DPCCH channel of the current protocol. Similarly, when some time slots of an additionally allocated HARQ-ACK feedback channel are not in use, DTX transmission processing can be performed.
具体如图15所示，为接收端在ACQI反馈信道的每个TTI内的第一时隙中始终向第一发射天线反馈ACK信息，在另一HARQ-ACK反馈信道的每个TTI内的第一时隙和第二时隙分别向第二发射天线和第三发射天线反馈ACK信息，并在第三时隙进行DTX传输的状态示意图；Specifically as shown in Figure 15, the receiving end always feeds back ACK information to the first transmit antenna in the first time slot of each TTI of the ACQI feedback channel, and the first time slot of each TTI of another HARQ-ACK feedback channel A schematic diagram of feeding back ACK information to the second transmit antenna and the third transmit antenna in the first time slot and the second time slot, and performing DTX transmission in the third time slot;
如图16所示，为接收端在ACQI反馈信道的每个TTI内的第一时隙中始终向第一发射天线反馈ACK信息，在另一HARQ-ACK反馈信道的每个TTI内的三个时隙中分别向第二、第三、第四发射天线反馈ACK信息的状态示意图。As shown in Figure 16, for the receiving end to always feed back ACK information to the first transmit antenna in the first time slot in each TTI of the ACQI feedback channel, three HARQ-ACK feedback channels in each TTI of another HARQ-ACK feedback channel A schematic diagram of states of feeding back ACK information to the second, third, and fourth transmit antennas respectively in a time slot.
第三种：接收端可以在HS-DPCCH信道的不同TTI内的第一时隙中始终向一个发射天线反馈相应的HARQ信息，并将需要反馈给该发射天线之外的其他各个发射天线的HARQ信息分别通过设置不同的第二附加信道进行反馈。The third type: the receiving end can always feed back the corresponding HARQ information to a transmit antenna in the first time slot in different TTIs of the HS-DPCCH channel, and will need to feed back the HARQ information of other transmit antennas other than the transmit antenna The information is fed back by setting different second additional channels respectively.
具体的如图17所示，为接收端在ACQI反馈信道的每个TTI内的第一时隙中始终向第一发射天线反馈ACK信息，在其他每个附加HARQ-ACK反馈信道的每个TTI内的第一时隙中分别向其他发射天线反馈ACK信息的状态示意图，其中在为第二发射天线配置的HARQ-ACK反馈信道的每个TTI内的第一时隙中分别向第一发射天线反馈当时对应的ACK信息，并在为第三发射天线配置的HARQ-ACK反馈信道的每个TTI内的第一时隙中分别向第三发射天线反馈当时对应的ACK信息，并在为第四发射天线配置的HARQ-ACK反馈信道的每个TTI内的第一时隙中分别向该第四发射天线反馈当时对应的ACK信息。Specifically, as shown in Figure 17, the receiving end always feeds back ACK information to the first transmit antenna in the first time slot in each TTI of the ACQI feedback channel, and in each TTI of each additional HARQ-ACK feedback channel Schematic diagram of the status of feeding back ACK information to other transmit antennas in the first time slot in , wherein the first time slot in each TTI of the HARQ-ACK feedback channel configured for the second transmit antenna is respectively sent to the first transmit antenna Feedback the corresponding ACK information at that time, and respectively feed back the corresponding ACK information to the third transmitting antenna in the first time slot in each TTI of the HARQ-ACK feedback channel configured for the third transmitting antenna, and in the fourth In the first time slot in each TTI of the HARQ-ACK feedback channel configured by the transmitting antenna, the corresponding ACK information at that time is respectively fed back to the fourth transmitting antenna.
即第三种HARQ信息的反馈方式采用分别设置不同的HARQ-ACK反馈信道(HS-ACKCH)，来分别反馈不同发射天线的ACK信息，其中这里额外设置的HARQ-ACK反馈信道的信道结构与当前协议的HS-DPCCH信道中用于反馈HARQ-ACK信息的TTI内的第一时隙信道结构完全相同，只使用每个设置的HARQ-ACK反馈信道的每个TTI内的第一个时隙来反馈ACK信息，每个TTI内剩余的两个时隙采用DTX传输。这样可以使Node B更快的获得各个发射天线需要的HARQ反馈信息(ACK/NACK信息)，从而减小反馈HARQ信息的延时，但是当发射天线数目比较大时，会造成在每个TTI内的第一个时隙中峰值功率比较大，这里可以通过让不同的接收端在上行反馈信道上定时将不同时隙相互错开，从而来减少由此所产生的上行峰值干扰功率。That is, the third HARQ information feedback method adopts setting different HARQ-ACK feedback channels (HS-ACKCH) respectively to feed back the ACK information of different transmitting antennas, wherein the channel structure of the additionally set HARQ-ACK feedback channel here is different from that of the current The channel structure of the first time slot in the TTI used to feed back HARQ-ACK information in the HS-DPCCH channel of the protocol is exactly the same, and only the first time slot in each TTI of each configured HARQ-ACK feedback channel is used to ACK information is fed back, and the remaining two time slots in each TTI are transmitted using DTX. In this way, the Node B can obtain the HARQ feedback information (ACK/NACK information) required by each transmit antenna faster, thereby reducing the delay in feeding back the HARQ information, but when the number of transmit antennas is relatively large, it will cause a delay in each TTI. The peak power in the first time slot is relatively large. Here, the uplink peak interference power can be reduced by allowing different receiving ends to stagger different time slots on the uplink feedback channel.
相应于本发明上述提出的第二种基于多天线AMC的信息反馈方法，本发明这里还进而提出了另一种基于多天线AMC的信息反馈装置，该装置可以安置于移动通信系统中的移动用户终端内部。请参照图18，该图是本发明提出的第二种基于多天线AMC的信息反馈装置的主要组成结构框图，其主要包括第一信息反馈单元100和第二信息反馈单元200，这两个主要组成单元的具体作用如下：Corresponding to the second information feedback method based on multi-antenna AMC proposed above in the present invention, the present invention further proposes another information feedback device based on multi-antenna AMC, which can be installed in mobile users in the mobile communication system inside the terminal. Please refer to FIG. 18 , which is a block diagram of the main components of the second information feedback device based on multi-antenna AMC proposed by the present invention, which mainly includes a first
第一信息反馈单元100，主要用于接收端在HS-DPCCH信道的不同TTI内向不同发射天线反馈当时对应的AMC信息(绝对AMC信息)；The first
第二信息反馈单元200，主要用于上述第一信息反馈单元100在HS-DPCCH信道用于向一个发射天线反馈对应AMC信息的TTI内，在另外的附加信道上向该发射天线之外的其他相应发射天线反馈当时需要反馈的AMC信息相对于前面已反馈的AMC信息的相对信息(相对AMC信息)。The second
有关于本发明提出的第二种基于多天线AMC的信息反馈装置的其他具体技术实现细节请参照本发明上述提出的第二种基于多天线AMC的信息反馈方法的相应具体技术实现细节，这里不再给予过多赘述。For other specific technical implementation details of the second multi-antenna AMC-based information feedback device proposed in the present invention, please refer to the corresponding specific technical implementation details of the second multi-antenna AMC-based information feedback method proposed above in the present invention. Give too much restatement.
由此可见，本发明上述方案通过在不同时间域向同一发射天线反馈绝对AMC信息或相对AMC信息，从而可以减少接收端向各个发射天线反馈的AMC信息量，相应的也就减小了接收端反馈的控制信令开销，本发明技术方案不但可以适用于WCDMA系统，还可以适用于OFDM/OFDMA系统和CDMA系统等等。It can be seen that the above scheme of the present invention feeds back absolute AMC information or relative AMC information to the same transmitting antenna in different time domains, thereby reducing the amount of AMC information fed back by the receiving end to each transmitting antenna, and correspondingly reducing the amount of AMC information fed back by the receiving end. For the feedback control signaling overhead, the technical solution of the present invention is not only applicable to WCDMA systems, but also applicable to OFDM/OFDMA systems, CDMA systems and the like.
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.
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| CN101741488A (en)* | 2010-01-29 | 2010-06-16 | 华为技术有限公司 | Link adaptation method and device based on time division system |
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