WO2017143899A1

WO2017143899A1 - Method and device for sending and receiving control information

Info

Publication number: WO2017143899A1
Application number: PCT/CN2017/072532
Authority: WO
Inventors: 陈晓航; 李安新; 蒋惠玲
Original assignee: 株式会社Ntt都科摩
Priority date: 2016-02-24
Filing date: 2017-01-25
Publication date: 2017-08-31
Also published as: CN107124771A; JP6770077B2; CN109196938A; JP2019512182A; CN109196938B

Abstract

The present invention relates to a method for sending control information, comprising: a base station determining demodulation information about a first user terminal (UE) and demodulation auxiliary information about a second UE paired with a first UE, wherein the demodulation information about the first UE is used for the first UE to demodulate downlink data of the first UE, and the demodulation auxiliary information about the second UE is used for the first UE to demodulate downlink data of the second UE; determining the length of the demodulation auxiliary information about the second UE; sending the demodulation information about the first UE and the length of the demodulation auxiliary information about the second UE to the first UE via a first downlink control message; and sending the demodulation auxiliary information about the second UE to the first UE via a second downlink control message, wherein the first UE receives the second downlink control message according to the length of the demodulation auxiliary information about the second UE. The present invention also relates to a method for receiving control information and a corresponding base station and user terminal.

Description

控制信息的发送、接收方法及装置Method and device for transmitting and receiving control information

技术领域Technical field

本发明涉及无线通信***，特别涉及非正交多址接入(NOMA)***中的控制信息的发送和接收方法及对应的基站和用户终端。The present invention relates to a wireless communication system, and more particularly to a method for transmitting and receiving control information in a non-orthogonal multiple access (NOMA) system and a corresponding base station and user terminal.

发明背景Background of the invention

在频谱资源日趋紧缺的今天，能极大地提高频谱效率的非正交多址接入(NOMA)技术越来越受到人们的关注。NOMA技术的基本思想是在发送端采用非正交传输，主动引入干扰信息，而在接收端通过接收机的处理，如干扰消除或最大似然检测等方法实现正确解调。虽然在接收端引入干扰消除等技术会增加接收机的复杂度，但是采用非正交的多址接入可以很好地提高***的频谱效率，因此，NOMA技术已经成为目前无线通信的热点技术之一。In today's increasingly scarce spectrum resources, non-orthogonal multiple access (NOMA) technology, which can greatly improve spectral efficiency, has received increasing attention. The basic idea of NOMA technology is to use non-orthogonal transmission at the transmitting end to actively introduce interference information, and at the receiving end to achieve correct demodulation by means of receiver processing such as interference cancellation or maximum likelihood detection. Although introducing interference cancellation techniques at the receiving end increases the complexity of the receiver, non-orthogonal multiple access can improve the spectrum efficiency of the system. Therefore, NOMA technology has become a hotspot technology for wireless communication. One.

发明内容Summary of the invention

本发明的实施例提供了控制信息的发送方法，主要包括：基站在进行用户调度确定与第一用户终端(UE)配对的第二UE后，确定所述第一UE的解调信息和第二UE的解调辅助信息；其中，所述第一UE的解调信息用于由所述第一UE解调所述第一UE的下行数据；所述第二UE的解调辅助信息用于由所述第一UE解调第二UE的下行数据；基站确定第二UE的解调辅助信息的长度；基站将第一UE的解调信息以及第二UE解调辅助信息的长度通过第一下行控制消息发送给第一UE；以及基站将第二UE的解调辅助信息通过第二下行控制消息发送给第一UE；其中，所述第一UE根据所述第二UE的解调辅助信息的长度接收所述第二下行控制消息。 An embodiment of the present invention provides a method for transmitting control information, which mainly includes: determining, by a base station, demodulation information and second information of the first UE after performing a user scheduling to determine a second UE paired with a first user terminal (UE) Demodulation assistance information of the UE, where demodulation information of the first UE is used to demodulate downlink data of the first UE by the first UE; demodulation assistance information of the second UE is used by Decoding the downlink data of the second UE by the first UE; determining, by the base station, the length of the demodulation assistance information of the second UE; the base station passes the demodulation information of the first UE and the length of the second UE demodulation auxiliary information through the first And sending, by the base station, the demodulation assistance information of the second UE to the first UE by using a second downlink control message, where the first UE is configured according to the demodulation auxiliary information of the second UE The length receives the second downlink control message.

本发明的实施例还提供了控制信息接收方法，包括：UE接收第一下行控制消息；UE从接收的第一下行控制消息中提取自身的解调信息以及配对UE的解调辅助信息的长度，其中，所述UE的解调信息用于由所述UE解调所述UE的下行数据；UE根据所述配对UE的解调辅助信息的长度确定第二下行控制消息的长度；UE根据确定的第二下行控制消息的长度接收第二下行控制消息；UE从所述第二下行控制消息中提取所述配对UE的解调辅助信息；其中所述UE根据所述配对UE的解调辅助信息解调所述配对UE的下行数据。The embodiment of the present invention further provides a method for receiving control information, including: receiving, by a UE, a first downlink control message; and extracting, by the UE, the demodulation information of the first downlink control message and the demodulation auxiliary information of the paired UE. a length, where the demodulation information of the UE is used to demodulate downlink data of the UE by the UE; the UE determines a length of the second downlink control message according to a length of the demodulation auxiliary information of the paired UE; Receiving, by the length of the second downlink control message, a second downlink control message, where the UE extracts demodulation assistance information of the paired UE from the second downlink control message, where the UE is configured according to demodulation of the paired UE The information demodulates the downlink data of the paired UE.

本发明的实施例还提供了一种基站，包括：An embodiment of the present invention further provides a base station, including:

用户调度单元，用于进行用户调度，确定与第一UE配对的第二UE；a user scheduling unit, configured to perform user scheduling, and determine a second UE that is paired with the first UE;

解调信息确定单元，用于确定所述第一UE的解调信息；其中，所述第一UE的解调信息用于由所述第一UE解调所述第一UE的下行数据；a demodulation information determining unit, configured to determine demodulation information of the first UE, where the demodulation information of the first UE is used to demodulate downlink data of the first UE by the first UE;

解调辅助信息确定单元，用于确定所述第二UE的解调辅助信息；其中，所述第二UE的解调辅助信息用于由所述第一UE解调所述第二UE的下行数据；a demodulation assistance information determining unit, configured to determine demodulation assistance information of the second UE, where demodulation assistance information of the second UE is used to demodulate downlink of the second UE by the first UE data;

信息长度确定单元，用于确定所述第二UE的解调辅助信息的长度；An information length determining unit, configured to determine a length of demodulation auxiliary information of the second UE;

第一生成单元，用于根据所述第一UE的解调信息以及第二UE解调辅助信息的长度生成第一下行控制消息；a first generating unit, configured to generate a first downlink control message according to the demodulation information of the first UE and the length of the second UE demodulation auxiliary information;

第二生成单元，用于根据所述第二UE的解调辅助信息生成第二下行控制消息；以及a second generating unit, configured to generate a second downlink control message according to the demodulation assistance information of the second UE;

发送单元，用于将所述第一下行控制消息和所述第二下行控制消息发送给第一UE，其中，所述第一UE根据所述第二UE的解调辅助信息的长度接收所述第二下行控制消息。a sending unit, configured to send the first downlink control message and the second downlink control message to the first UE, where the first UE receives the length according to the length of the demodulation auxiliary information of the second UE The second downlink control message is described.

本发明的实施例还提供了一种UE，包括： An embodiment of the present invention further provides a UE, including:

接收单元，用于接收第一下行控制消息和第二下行控制消息；a receiving unit, configured to receive a first downlink control message and a second downlink control message;

信息提取单元，用于从第一下行控制消息中提取自身的解调信息以及配对UE的解调辅助信息的长度，以及用于从第二下行控制消息中提取配对UE的解调辅助信息；其中所述UE的解调信息用于由所述UE解调所述UE的下行数据；所述配对UE的解调辅助信息用于由所述UE解调所述配对UE的下行数据；以及An information extracting unit, configured to extract, from the first downlink control message, the demodulation information of the UE and the length of the demodulation assistance information of the paired UE, and the demodulation assistance information used to extract the paired UE from the second downlink control message; The demodulation information of the UE is used to demodulate downlink data of the UE by the UE; demodulation assistance information of the paired UE is used to demodulate downlink data of the paired UE by the UE;

消息长度确定单元，用于根据所述配对UE的解调辅助信息的长度确定第二下行控制消息的长度，并将确定的第二下行控制消息的长度反馈给接收单元用于接收所述第二下行控制消息。a message length determining unit, configured to determine a length of the second downlink control message according to the length of the demodulation auxiliary information of the paired UE, and feed back the determined length of the second downlink control message to the receiving unit, to receive the second Downstream control message.

如前所述，本实施例提供的控制信息的发送和接收方法以及对应的基站和用户终端可以实现下行控制信息的传输，为采用非正交多址接入方式复用的用户终端进行干扰的检测或消除提供了足够的信息，适用多种接收机类型，且对现有的协议改动很小，更进一步还具有信令的开销小以及对UE接收机的复杂度要求不高等优点。As described above, the method for transmitting and receiving control information and the corresponding base station and user terminal provided by the embodiment may implement downlink control information transmission, and perform interference for user terminals multiplexed by using non-orthogonal multiple access mode. Detecting or eliminating provides sufficient information for a variety of receiver types, and has little change to existing protocols, and further has the advantages of low signaling overhead and low complexity of UE receivers.

附图简要说明BRIEF DESCRIPTION OF THE DRAWINGS

图1显示了在NOMA***中两个用户终端复用相同的时频资源的示例；FIG. 1 shows an example of multiplexing the same time-frequency resources by two user terminals in a NOMA system;

图2显示了本发明实施例所述的基站发送控制信息的方法；2 shows a method for a base station to send control information according to an embodiment of the present invention;

图3显示了本申请一些实施例中第一下行控制消息的消息结构；FIG. 3 shows a message structure of a first downlink control message in some embodiments of the present application;

图4显示了本申请一些实施例中第二下行控制消息的消息结构；4 shows a message structure of a second downlink control message in some embodiments of the present application;

图5显示了本发明实施例所述的用户终端接收控制信息的方法；FIG. 5 shows a method for receiving control information by a user terminal according to an embodiment of the present invention;

图6显示了另一本发明实施例所述的用户终端接收控制信息的方法；FIG. 6 shows another method for receiving user control information according to an embodiment of the present invention;

图7显示了本发明实施例所述的基站的内部结构示意图；以及FIG. 7 is a schematic diagram showing the internal structure of a base station according to an embodiment of the present invention;

图8显示了本发明实施例所述的用户终端的内部结构示意图。 FIG. 8 is a schematic diagram showing the internal structure of a user terminal according to an embodiment of the present invention.

具体实施方式detailed description

在NOMA***中，由于多个用户采用的是非正交的多址接入方式，因此多个用户可以同时占用相同的时频资源，从而可以极大地提高通信***的频率效率。为实现非正交的多址接入方式，占用相同时频资源的多个用户的下行数据是通过基站分配的不同下行发射功率来相互区分的。In the NOMA system, since multiple users adopt a non-orthogonal multiple access method, multiple users can simultaneously occupy the same time-frequency resource, thereby greatly improving the frequency efficiency of the communication system. To implement the non-orthogonal multiple access mode, downlink data of multiple users occupying the same time-frequency resource are distinguished from each other by different downlink transmit powers allocated by the base station.

下文中，为了描述方便，将经过基站用户调度而被分配相同时频资源的用户终端相互称各自的配对用户终端，也即用户终端A的配对用户终端是指被分配与用户A占用相同时频资源的用户终端。例如，用户终端A和用户终端B被分配占用相同的时频资源，则用户终端A为用户终端B的配对用户终端，而用户终端B为用户终端A的配对用户终端。Hereinafter, for convenience of description, user terminals that are allocated by the base station user and allocated the same time-frequency resource are referred to as respective paired user terminals, that is, the paired user terminal of the user terminal A is assigned the same time frequency as that occupied by the user A. User terminal for the resource. For example, if user terminal A and user terminal B are allocated to occupy the same time-frequency resource, user terminal A is the paired user terminal of user terminal B, and user terminal B is the paired user terminal of user terminal A.

下面还将通过举例简要说明在NOMA***中如何通过不同的下行发射功率来区分不同用户终端的数据。In the following, a brief description will be given of how to distinguish data of different user terminals by different downlink transmission powers in the NOMA system.

图1显示了在NOMA***中两个用户终端UE1和UE2复用相同时频资源的一个示例。在这两个用户终端(UE)中，UE1距离基站(BS)较近，可以称为近端UE(NUE，Near UE)；而UE2距离基站(BS)较远，可以称为远端UE(FUE，Far UE)。且UE1和UE2将复用相同的下行时频资源，也即针对UE1和UE2，基站将使用相同的下行时频资源发送这两个UE的下行数据，从而实现非正交的多址接入，也即基站发送的信号是包含两个UE下行数据的混合信号。FIG. 1 shows an example in which two user terminals UE1 and UE2 multiplex the same time-frequency resources in the NOMA system. In the two user terminals (UEs), the UE1 is closer to the base station (BS) and may be referred to as a near-end UE (NUE, Near UE); and the UE2 is farther away from the base station (BS) and may be referred to as a remote UE ( FUE, Far UE). The UE1 and the UE2 will multiplex the same downlink time-frequency resources, that is, for the UE1 and the UE2, the base station will use the same downlink time-frequency resource to transmit the downlink data of the two UEs, thereby implementing non-orthogonal multiple access. That is, the signal transmitted by the base station is a mixed signal including downlink data of two UEs.

为了区分基站发送给UE1的下行数据和基站发送给UE2的下行数据，基站将使用较高的发射功率发送FUE(UE2)的下行数据，而使用较低的发射功率发送NUE(UE1)的下行数据。这样，在UE侧，即使所接收到的信号是NUE和FUE下行数据的混合信号，接收端也可以首先通过干扰消除技术从所接收信号中去除基站发送给其他用户的信号，然后再解调出自身的下行数据。In order to distinguish the downlink data sent by the base station to the UE1 and the downlink data sent by the base station to the UE2, the base station will use the higher transmit power to transmit the downlink data of the FUE (UE2), and use the lower transmit power to transmit the downlink data of the NUE (UE1). . Thus, on the UE side, even if the received signal is a mixed signal of downlink data of NUE and FUE, the receiving end also The signal sent by the base station to other users may be removed from the received signal by the interference cancellation technique, and then the downlink data of the base station may be demodulated.

例如，对于NUE(UE1)而言，由于基站发送自身下行数据时使用的下行发射功率比较小，而发送其他FUE(UE2)的下行数据时所使用的下行发射功率比较大，因此，UE1所接收到的混合信号中，基站发给FUE(UE2)的下行信号所占的比重很大，导致直接解调UE1自身的下行数据很难成功。在这种情况下，如果UE1可以预先知道解调FUE(UE2)下行数据所需的辅助信息，例如，FUE(UE2)的功率分配信息、资源分配信息以及调制编码方式(MCS)等进行下行数据解调所需的信息，UE1就可以先进行干扰消除，也即先将基站发给FUE(UE2)的下行数据解调出来；然后，再从自身接收的混合信号中将基站发给FUE(UE2)的信号去除掉，从而还原得到主要包含自身下行数据的信号。为了描述方便，在下文中，将上述解调自身以外某个其他用户终端下行数据所需的辅助信息简称为该其他用户终端的解调辅助信息。在进行干扰消除后，UE1再根据解调自身下行数据所需的信息对干扰消除后的信号进行解调，从而可以得到基站发送给自身的下行数据。为了与其他用户终端的解调辅助信息进行区分，将某个用户终端解调自身下行数据所需的信息称为该用户终端的解调信息。同样，对于FUE(UE2)而言，如果可以预先知道解调NUE(UE1)下行数据所需的辅助信息，即NUE(UE1)的解调辅助信息，UE2就可以先进行干扰消除，然后，再根据自身的解调辅助信息对干扰消除后的信号进行解调，得到基站发送给自身的下行数据。当然，由于基站发送NUE(UE1)的下行数据时使用的下行发射功率比较小，而发送FUE(UE2)的下行数据时所使用的下行发射功率比较大，因此，在UE2所接收到的混合信号中，基站发给NUE(UE1)的下行信号所占的比重很小。在这种情况下，FUE(UE2)也可以不进行干扰消除而将基站发送给NUE(UE1)的下行数据作为噪声，直接解调自身的下行数据。For example, for the NUE (UE1), the downlink transmit power used by the base station to transmit its own downlink data is relatively small, and the downlink transmit power used when transmitting the downlink data of other FUEs (UE2) is relatively large. Therefore, the UE1 receives the downlink transmit power. In the mixed signal, the downlink signal sent by the base station to the FUE (UE2) accounts for a large proportion, which makes it difficult to directly demodulate the downlink data of the UE1 itself. In this case, if the UE1 can know in advance the auxiliary information required to demodulate the FUE (UE2) downlink data, for example, the FUE (UE2) power allocation information, the resource allocation information, and the modulation and coding scheme (MCS), etc., perform downlink data. To demodulate the required information, UE1 can perform interference cancellation first, that is, first demodulate the downlink data sent by the base station to the FUE (UE2); then, send the base station to the FUE from the mixed signal received by itself (UE2) The signal is removed, thereby reducing the signal that mainly contains its own downlink data. For convenience of description, in the following, the auxiliary information required for demodulating downlink data of some other user terminal other than itself is simply referred to as demodulation auxiliary information of the other user terminals. After the interference cancellation is performed, the UE1 demodulates the interference-cancelled signal according to the information required to demodulate the downlink data, so that the downlink data sent by the base station to itself can be obtained. In order to distinguish from the demodulation auxiliary information of other user terminals, the information required for a certain user terminal to demodulate its own downlink data is referred to as demodulation information of the user terminal. Similarly, for FUE (UE2), if the auxiliary information required to demodulate the NUE (UE1) downlink data, that is, the demodulation assistance information of the NUE (UE1), can be known in advance, the UE2 can perform interference cancellation first, and then, The signal after the interference cancellation is demodulated according to the demodulation auxiliary information of the self, and the downlink data sent by the base station to itself is obtained. Certainly, the downlink transmit power used when the base station transmits the downlink data of the NUE (UE1) is relatively small, and the downlink transmit power used when transmitting the downlink data of the FUE (UE2) is relatively large, so the mixed signal received by the UE2 is In the downlink sent by the base station to the NUE (UE1) The proportion of signals is small. In this case, the FUE (UE2) may directly demodulate its own downlink data by using the downlink data transmitted by the base station to the NUE (UE1) as noise without performing interference cancellation.

由上述干扰消除过程可以看出，为了在某个用户终端的接收机处完成干扰消除，基站需要先将其配对用户终端的解调辅助信息发送给该用户终端，例如将FUE(UE2)的解调辅助信息发送给NUE(UE1)。然而，当前的长期演进***(LTE)协议版本中并未给出基站如何将某个用户终端的配对用户终端的解调辅助信息发送给该用户终端的方法。It can be seen from the above interference cancellation process that in order to complete the interference cancellation at the receiver of a certain user terminal, the base station needs to first send the demodulation auxiliary information of its paired user terminal to the user terminal, for example, the solution of FUE (UE2). The adjustment auxiliary information is sent to the NUE (UE1). However, the current version of the Long Term Evolution System (LTE) protocol does not teach how the base station transmits demodulation assistance information of a paired user terminal of a certain user terminal to the user terminal.

本发明的实施例提供了下行控制信息的发送和接收方法，可以用于传输用户终端的解调信息及其配对用户终端的解调辅助信息。为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。The embodiment of the present invention provides a method for transmitting and receiving downlink control information, which can be used to transmit demodulation information of a user terminal and demodulation auxiliary information of the paired user terminal. The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

图2显示了本发明的实施例提供的一种控制信息的发送方法。如图2所示，该方法主要包括以下过程。FIG. 2 shows a method for transmitting control information provided by an embodiment of the present invention. As shown in FIG. 2, the method mainly includes the following process.

步骤201，基站进行用户调度，确定与第一用户终端(UE)配对的第二UE。Step 201: The base station performs user scheduling, and determines a second UE that is paired with the first user terminal (UE).

其中，上述第一UE是指参与用户调度的任意一个UE。与第一UE配对的第二UE即为被分配与第一UE占用相同下行时频资源的UE，也即在本***中第一UE与第二UE将采用非正交的多址接入方式复用相同的时频资源。The first UE refers to any UE that participates in user scheduling. The second UE that is paired with the first UE is a UE that is allocated the same downlink time-frequency resource as the first UE, that is, in the present system, the first UE and the second UE will adopt a non-orthogonal multiple access mode. Reuse the same time-frequency resources.

在本实施例中，上述第二UE可以是一个UE也可以包括多个UE。也即，本实施例所应用的NOMA***既可以支持对齐的资源分配方式(Aligned Resource Allocation)也可以支持非对齐的资源分配方式(Non-Aligned Resource Allocation)。In this embodiment, the foregoing second UE may be one UE or multiple UEs. That is, the NOMA system applied in this embodiment can support both aligned resource allocation (Aligned Resource Allocation) and non-aligned resource allocation (Non-Aligned Resource Allocation).

此外，在本步骤中，基站在进行用户调度时可以参考现有LTE协议版本规定的用户调度方法。例如，正比公平调度、轮询调度等等。In addition, in this step, the base station may refer to the user scheduling method specified by the existing LTE protocol version when performing user scheduling. For example, proportional fair scheduling, polling scheduling, and the like.

步骤202，基站确定上述第一UE的解调信息。Step 202: The base station determines demodulation information of the first UE.

如前所述，上述第一UE的解调信息是指解调第一UE下行数据所需的各种信息。例如，第一UE的解调信息可以包括：资源分配(RA)信息、解调参考信号(DMRS)信息、调制编码方式(MCS)信息、混合自动重传请求(HARQ)信息等等之一或其组合。在本发明的一个实施例中，上述第一UE的解调信息还可以不包含RA信息。在这种情况下，第一UE可以根据第二UE的解调辅助信息中第二UE的RA信息来确定自身的RA信息，从而进一步减小信令开销。As described above, the demodulation information of the first UE refers to various information required to demodulate downlink data of the first UE. For example, the demodulation information of the first UE may include one of resource allocation (RA) information, demodulation reference signal (DMRS) information, modulation and coding scheme (MCS) information, hybrid automatic repeat request (HARQ) information, or the like. Its combination. In an embodiment of the present invention, the demodulation information of the first UE may not include RA information. In this case, the first UE may determine its own RA information according to the RA information of the second UE in the demodulation assistance information of the second UE, thereby further reducing the signaling overhead.

步骤203，基站确定上述第二UE的解调辅助信息。Step 203: The base station determines demodulation assistance information of the second UE.

如前所述，上述第二UE的解调辅助信息是指解调第二UE下行数据所需的各种信息。例如，第二UE的解调辅助信息可以包括：发射功率分配(TPA)信息、RA信息、DMRS信息、UE间干扰信息(Existence of Intra-UE Interference)、调制级别(Modulation Order)、预编码向量(Pre-Coding Vector)、传输方案(Transmission Scheme)以及MCS信息、HARQ信息、传输块大小(TBS)信息、解扰以及循环冗余校验信息等之一或其组合。As described above, the demodulation assistance information of the second UE refers to various information required to demodulate the downlink data of the second UE. For example, the demodulation assistance information of the second UE may include: transmit power allocation (TPA) information, RA information, DMRS information, Existence of Intra-UE Interference, Modulation Order, precoding vector. (Pre-Coding Vector), Transmission Scheme, and one or a combination of MCS information, HARQ information, Transport Block Size (TBS) information, descrambling, and cyclic redundancy check information.

上述第二UE的解调辅助信息具体包括哪些内容与第一UE所采用的接收机类型及功能有关。因此，在应用中，基站将根据第一UE的接收机类型以及是否支持盲检测来确定第二UE的解调辅助信息的内容。 The demodulation assistance information of the second UE specifically includes what content is related to the receiver type and function used by the first UE. Therefore, in an application, the base station will determine the content of the demodulation assistance information of the second UE according to the receiver type of the first UE and whether or not blind detection is supported.

具体而言，例如，若UE侧采用低复杂度最大似然(R-ML)接收机或符号级干扰消除(SLIC)接收机，则上述解调辅助信息可以包括：TPA信息、RA信息、DMRS信息、UE间干扰信息、调制级别、预编码向量、以及传输方案等。若UE侧采用码字级干扰消除(CWIC)接收机则上述解调辅助信息还应当包括：MCS信息，混合自动重传请求(HARQ)信息、TBS信息、解扰以及循环冗余校验信息等。Specifically, for example, if the UE side adopts a low complexity maximum likelihood (R-ML) receiver or a symbol level interference cancellation (SLIC) receiver, the demodulation auxiliary information may include: TPA information, RA information, DMRS. Information, inter-UE interference information, modulation level, precoding vector, and transmission scheme. If the UE side adopts a codeword level interference cancellation (CWIC) receiver, the demodulation auxiliary information should also include: MCS information, hybrid automatic repeat request (HARQ) information, TBS information, descrambling, and cyclic redundancy check information. .

又例如，如果UE所采用的接收机为支持盲检测的接收机，则上述辅助信息可以进一步减少，可以不包括：UE间干扰信息、调制级别、预编码向量、传输方案等。在这种情况下，由于UE的接收机支持盲检测，因此，UE在收到第一UE的解调信息和第二UE的解调辅助信息后，需要再通过盲检测获取解调第二UE下行数据所需的全部辅助信息，然后即可解调出基站发送给第二UE的下行数据，并在进行干扰消除后解调出基站发送给第一UE的下行数据。而如果UE所采用的接收机为不支持盲检测的接收机，则上述辅助信息则应当包括：UE间干扰信息、调制级别、预编码向量、传输方案等。在这种情况下，UE在收到第一UE的解调信息和第二UE的解调辅助信息后，即可解调出基站发送给第二UE的下行数据，并在进行干扰消除后解调出基站发送给第一UE的下行数据。For another example, if the receiver used by the UE is a receiver supporting blind detection, the auxiliary information may be further reduced, and may not include: inter-UE interference information, modulation level, precoding vector, transmission scheme, and the like. In this case, since the receiver of the UE supports the blind detection, after receiving the demodulation information of the first UE and the demodulation auxiliary information of the second UE, the UE needs to acquire the demodulated second UE by using the blind detection. All the auxiliary information required for the downlink data is used, and then the downlink data sent by the base station to the second UE is demodulated, and after the interference cancellation is performed, the downlink data sent by the base station to the first UE is demodulated. If the receiver used by the UE is a receiver that does not support blind detection, the auxiliary information should include: inter-UE interference information, modulation level, precoding vector, transmission scheme, and the like. In this case, after receiving the demodulation information of the first UE and the demodulation auxiliary information of the second UE, the UE may demodulate the downlink data sent by the base station to the second UE, and perform solution after interference cancellation. The downlink data sent by the base station to the first UE is called.

步骤204，基站确定第二UE的解调辅助信息的长度。Step 204: The base station determines the length of the demodulation auxiliary information of the second UE.

如前所述，第二UE可以是一个UE也可以包括多个UE，因此，所有第二UE的解调辅助信息的总长度也是不固定的，特别是在支持非对齐的资源分配方式下，第二UE的数目越多，第二UE的解调辅助信息的长度就越长。As described above, the second UE may be one UE or multiple UEs. Therefore, the total length of the demodulation assistance information of all the second UEs is also not fixed, especially in the case of supporting non-aligned resource allocation modes. The greater the number of second UEs, the longer the demodulation assistance information of the second UE is.

在本发明的一个实施例中，上述第二UE的解调辅助信息的长度可以是第二UE的数目，也即第二UE的数目是N，本步骤所确定的第二UE的解调信息的长度就是N。In an embodiment of the present invention, the length of the demodulation assistance information of the second UE may be the number of the second UE, that is, the number of the second UE is N, determined by this step. The length of the demodulation information of the second UE is N.

在本发明的另一个实施例中，基站首先对第二UE进行分组，将分组后第二UE的组数作为第二UE解调辅助信息的长度。也即，假设第二UE的数目是M，但是经过分组后，仅得到N个分组，其中，N≤M，本步骤所确定的第二UE的解调信息的长度就是N。本实施例所述确定第二UE的解调辅助信息的长度信息可以具体包括如下的步骤：In another embodiment of the present invention, the base station first groups the second UE, and uses the number of groups of the second UE after the packet as the length of the second UE demodulation assistance information. That is, it is assumed that the number of the second UE is M, but after the grouping, only N packets are obtained, where N≤M, and the length of the demodulation information of the second UE determined in this step is N. The determining the length information of the demodulation auxiliary information of the second UE in this embodiment may specifically include the following steps:

步骤2041，基站预先定义一种以上的UE复用模式。Step 2041: The base station pre-defines more than one UE multiplexing mode.

在本实施例中，UE的复用模式是由该UE的解调辅助信息中的一项或一项以上信息确定的表征UE复用方式的信息。上述一项或一项以上信息可以包括UE的调制级别、MCS信息、信道的秩(Rank)、DMRS信息、发射功率分配比例(TPA Ratio)、HARQ信息以及TBS信息之一或其组合。具体由哪些项信息确定UE的复用模式，也与UE所使用的接收机类型有关。例如，针对R-ML接收机或SLIC接收机，每一种UE的复用模式可以确定这个UE对应的调制级别、MCS信息、Rank和/或DMRS信息等。如果支持子带发射功率分配，则每一种UE的复用模式还将确定发射功率分配比例。又例如，针对CWIC接收机，每一种UE的复用模式还将确定HARQ信息以及TBS信息等。In this embodiment, the multiplexing mode of the UE is information that identifies the multiplexing mode of the UE, which is determined by one or more pieces of information of the demodulation assistance information of the UE. The one or more pieces of information may include one or a combination of a modulation level of the UE, MCS information, a rank of a channel, a DMRS information, a TPA ratio, a HARQ information, and a TBS information. Specifically, which item information determines the multiplexing mode of the UE, and is also related to the type of receiver used by the UE. For example, for an R-ML receiver or a SLIC receiver, the multiplexing mode of each UE may determine the modulation level, MCS information, Rank and/or DMRS information, etc. corresponding to this UE. If subband transmit power allocation is supported, the multiplexing mode of each UE will also determine the transmit power allocation ratio. For another example, for a CWIC receiver, the multiplexing mode of each UE will also determine HARQ information as well as TBS information and the like.

步骤2042，基站分别确定每个第二UE的复用模式，并按照各个第二UE的复用模式将第二UE进行分组，将复用模式相同的第二UE分为一组。Step 2042: The base station determines a multiplexing mode of each second UE, and groups the second UE according to the multiplexing mode of each second UE, and groups the second UEs with the same multiplexing mode into one group.

由上述步骤2041可以看出，对于不同的UE上述表征UE复用方式的信息却可能是相同的，也即不同的UE可能具有相同的复用模式。因此，在本步骤2042中，基站在确定每个第二UE的复用模式后，可以将第二UE进行分组，将复用模式相同的第二UE分在一组中。It can be seen from the above step 2041 that the information indicating the multiplexing mode of the UE may be the same for different UEs, that is, different UEs may have the same multiplexing mode. Therefore, in this step 2042, after determining the multiplexing mode of each second UE, the base station The second UE may be grouped, and the second UEs having the same multiplexing mode are grouped into one group.

步骤2043，基站将第二UE的组数作为第二UE解调辅助信息的长度。Step 2043: The base station uses the number of groups of the second UE as the length of the second UE demodulation auxiliary information.

通过上述步骤2041～2043也可以确定解调第二UE下行数据的辅助信息的长度。且很容易理解，在本方法中，第二UE的组数要小于或者等于第二UE的数目。因此，通过本方法确定的第二UE解调辅助信息的长度要小于或者等于前面直接根据第二UE数目确定的第二UE解调辅助信息的长度。The length of the auxiliary information for demodulating the downlink data of the second UE can also be determined by the above steps 2041 to 2043. It is easy to understand that in the method, the number of groups of the second UE is less than or equal to the number of the second UE. Therefore, the length of the second UE demodulation assistance information determined by the method is less than or equal to the length of the second UE demodulation assistance information determined directly according to the second UE number.

接下来继续说明基站发送控制信息的方法。Next, the method of transmitting control information by the base station will be described.

步骤205，在确定了第一UE的解调信息和第二UE的解调辅助信息以及第二UE的解调辅助信息的长度后，基站将第一UE的解调信息以及第二UE解调辅助信息的长度通过第一下行控制消息发送给第一UE。 Step 205, after determining the demodulation information of the first UE, the demodulation assistance information of the second UE, and the length of the demodulation assistance information of the second UE, the base station demodulates the demodulation information of the first UE and the second UE. The length of the auxiliary information is sent to the first UE by using the first downlink control message.

在本步骤205中，基站可以通过物理下行链路控制信道(PDCCH)或LTE版本11中引入的增强的物理下行链路控制信道(EPDCCH)将第一下行控制消息发送给第一UE。具体而言，图3显示了本申请一些实施例中第一下行控制消息的一个示例。如图3所示，第一下行控制消息包括两个字段，第一个字段用于承载第一UE的解调信息；第二个字段用于承载第二UE解调辅助信息的长度，例如第二UE的数目或经过分组后第二UE的组数。可以看出，第一下行控制消息的长度是确定的。In this step 205, the base station may send the first downlink control message to the first UE by using an enhanced physical downlink control channel (EPDCCH) introduced in the physical downlink control channel (PDCCH) or the LTE version 11. In particular, Figure 3 shows an example of a first downlink control message in some embodiments of the present application. As shown in FIG. 3, the first downlink control message includes two fields, where the first field is used to carry the demodulation information of the first UE, and the second field is used to carry the length of the second UE demodulation auxiliary information, for example, The number of second UEs or the number of groups of second UEs after grouping. It can be seen that the length of the first downlink control message is determined.

步骤206，基站将第二UE的解调辅助信息通过第二下行控制消息发送给第一UE。Step 206: The base station sends the demodulation assistance information of the second UE to the first UE by using a second downlink control message.

在本步骤中，基站可以通过PDCCH或EPDCCH将第二下行控制消息发送给第一UE。具体而言，图4显示了本申请一些实施例中第二下行控制消息的一个示例。如图4所示，第二下行控制消息将包含N的字段，其中，N为步骤204确定的第二UE解调辅助信息的长度，例如第二UE的数目或经过分组后第二UE的组数。若N为第二UE的数目，则第二下行控制消息的每个字段将分别承载每个第二UE的解调辅助信息；若N为第二UE的组数，则第二下行控制消息的每个字段将分别承载每组第二UE的解调辅助信息。如前所述，解调辅助信息的内容与第一UE的接收机类型和是否支持盲检测有很大关系，主要可以包括：TPA、RA、DMRS信息、MCS等等。且通过比较两种方法可以看出，由于第二UE的组数必然小于或等于第二UE的数目，因此，通过采用设定UE复用模式的方式可以减小第二下行控制消息的长度，从而实现减少信令开销的目的。In this step, the base station may send the second downlink control message to the first UE by using the PDCCH or the EPDCCH. In particular, Figure 4 shows some embodiments of the present application. An example of a second downlink control message. As shown in FIG. 4, the second downlink control message will include a field of N, where N is the length of the second UE demodulation assistance information determined in step 204, such as the number of second UEs or the group of the second UE after packetization. number. If N is the number of the second UE, each field of the second downlink control message will respectively carry demodulation assistance information of each second UE; if N is the number of groups of the second UE, the second downlink control message Each field will carry demodulation assistance information for each group of second UEs, respectively. As described above, the content of the demodulation auxiliary information has a great relationship with the receiver type of the first UE and whether the blind detection is supported, and may mainly include: TPA, RA, DMRS information, MCS, and the like. And by comparing the two methods, it can be seen that, since the number of groups of the second UE is inevitably smaller than or equal to the number of the second UE, the length of the second downlink control message can be reduced by adopting a manner of setting the UE multiplexing mode. Thereby achieving the purpose of reducing signaling overhead.

通过上述方法，基站可以将第一UE的解调信息和第二UE的解调辅助信息发送给第一UE。此后，第一UE即可解调出基站发送给第二UE的下行数据，并在进行干扰消除后解调出基站发送给第一UE的下行数据。特别是在第一UE为NUE时，可以大大提高接收机解调的正确率。且由于在上述方法中，UE在接收到第一下行控制消息后可以直接确定第二下行控制消息的长度，因此，UE接收机检测第二下行控制消息的复杂度将大大降低。由此可以看出，本实施例提供的下行控制信息的发送方法不仅对现有的协议改动很小，而且还尽可能地折衷考虑了信令的开销以及UE接收机的复杂度等因素，是一种信令开销尽可能小，接收机复杂度也不高的方案。Through the above method, the base station may send the demodulation information of the first UE and the demodulation assistance information of the second UE to the first UE. Thereafter, the first UE can demodulate the downlink data sent by the base station to the second UE, and demodulate the downlink data sent by the base station to the first UE after performing interference cancellation. Especially when the first UE is NUE, the correct rate of receiver demodulation can be greatly improved. In the above method, the UE can directly determine the length of the second downlink control message after receiving the first downlink control message, and therefore, the complexity of detecting the second downlink control message by the UE receiver is greatly reduced. It can be seen that the method for transmitting the downlink control information provided by this embodiment not only has little change to the existing protocol, but also compromises the signaling overhead and the complexity of the UE receiver as much as possible. A scheme in which the signaling overhead is as small as possible and the receiver complexity is not high.

除此之外，如前所述，在上述本发明实施例的方法中，还可以进一步通过以下两个技术手段减少信令开销：第一个技术手段：第一UE的解调信息中不包括RA信息。在这种情况下，第一UE可以通过接收的第二UE的RA信息得到第一UE自身的RA信息。第二个技术手段：根据第二UE的解调辅助信息对第二UE进行分组，并将分组后的组数作为第二UE解调辅助信息的长度，且第二下行控制消息的每个字段用于承载每组第二UE的解调辅助信息。在这种情况下，第二下行控制消息的长度将与第二UE的组数有关，而不是与第二UE的数目有关。如此，通过上述第一个手段可以减少第一下行控制消息的长度，而通过上述第二个手段则可以减少第二下行控制信息的长度，从而实现减少信令开销的目的。需要说明的是，在实际的应用中，根据实际的情况需要，可以独立使用上述两个技术手段，也可以同时使用上述两个手段，也即最大限度地减少信令开销。In addition, as described above, in the foregoing method of the embodiment of the present invention, the signaling overhead can be further reduced by the following two technical means: the first technical means: the demodulation information of the first UE is not included. RA information. In this case, the first UE may obtain the RA information of the first UE itself by using the received RA information of the second UE. the second The technical means: grouping the second UE according to the demodulation auxiliary information of the second UE, and using the number of groups after the packet as the length of the second UE demodulation auxiliary information, and each field of the second downlink control message is used for carrying Demodulation assistance information for each group of second UEs. In this case, the length of the second downlink control message will be related to the number of groups of the second UE, rather than to the number of second UEs. In this way, the length of the first downlink control message can be reduced by using the foregoing first method, and the length of the second downlink control information can be reduced by using the foregoing second means, thereby achieving the purpose of reducing signaling overhead. It should be noted that, in actual applications, the foregoing two technical means may be used independently according to the actual situation, or the foregoing two means may be used simultaneously, that is, the signaling overhead is minimized.

相对应地，本发明的实施例还提供了一种下行控制信息的接收方法，其流程如图5所示，主要包括以下过程。Correspondingly, the embodiment of the present invention further provides a method for receiving downlink control information, and the process thereof is as shown in FIG. 5, and mainly includes the following process.

步骤501，UE接收第一下行控制消息。Step 501: The UE receives the first downlink control message.

在本发明的实施例中，UE可以从PDCCH或EPDCCH检测并接收第一下行控制消息。In an embodiment of the present invention, the UE may detect and receive the first downlink control message from the PDCCH or the EPDCCH.

步骤502，UE从接收的第一下行控制消息中提取自身的解调信息以及与自身配对的其他UE的解调辅助信息的长度。Step 502: The UE extracts its own demodulation information and the length of demodulation auxiliary information of other UEs paired with itself from the received first downlink control message.

步骤503，UE根据与自身配对的其他UE的解调辅助信息的长度，确定第二下行控制消息的长度。Step 503: The UE determines the length of the second downlink control message according to the length of the demodulation assistance information of the other UEs that are paired with the UE.

如前所述，第二下行控制消息包含的字段数目N为第二UE的解调辅助信息的长度，例如第二UE的数目或经过分组后第二UE的组数。因此，UE在从第一下行控制消息中获取了与自身配对的其他UE的解调辅助信息的长度即可确定第二下行控制消息的长度。且，在本发明的实施例中，第一和第二下行控制消息均可以通过PDCCH或EPDCCH信道传输。此外，由于在现有LTE协议版本中对PDCCH 或EPDCCH的长度有具体的规定，因此，UE在确定了第二下行控制消息的长度后也可以基本确定第二下行控制消息的大致位置。因此，UE接收机检测第二下行控制消息的复杂度可以大大降低。As described above, the number N of fields included in the second downlink control message is the length of the demodulation assistance information of the second UE, for example, the number of the second UE or the number of groups of the second UE after the grouping. Therefore, the UE can determine the length of the second downlink control message by acquiring the length of the demodulation assistance information of other UEs paired with itself from the first downlink control message. Moreover, in the embodiment of the present invention, the first and second downlink control messages may all be transmitted through a PDCCH or an EPDCCH channel. In addition, due to the PDCCH in the existing LTE protocol version Or the length of the EPDCCH is specifically specified. Therefore, after determining the length of the second downlink control message, the UE may basically determine the approximate location of the second downlink control message. Therefore, the complexity of the UE receiver detecting the second downlink control message can be greatly reduced.

步骤504，UE根据确定的第二下行控制消息的长度接收第二下行控制消息。Step 504: The UE receives the second downlink control message according to the determined length of the second downlink control message.

在本步骤中，UE也可以从PDCCH或EPDCCH检测并接收第二下行控制消息。In this step, the UE may also detect and receive the second downlink control message from the PDCCH or the EPDCCH.

步骤505，UE从第二下行控制消息中提取与自身配对的其他用户的解调辅助信息。Step 505: The UE extracts demodulation assistance information of other users paired with itself from the second downlink control message.

如前所述，第二下行控制消息中包含的解调辅助信息与UE接收机的类型有关，可能不包括解调下行数据所需的全部辅助信息，因此，在UE提取了与自身配对的其他用户的解调辅助信息之后，在接收机支持盲检测的情况下，还将进一步通过盲检测获取其他辅助信息。在得到所有辅助信息后，UE即可根据提取的和/或盲检测的辅助信息解调出基站发送给与自身配对的其他用户的下行数据，然后进行干扰消除后，最后，再根据从第一下行控制消息中提取的自身的解调信息和/或通过盲检测检测到的其他辅助信息进一步解调出基站发给自身的下行数据。As described above, the demodulation assistance information included in the second downlink control message is related to the type of the UE receiver, and may not include all the auxiliary information required for demodulating the downlink data. Therefore, the UE extracts other pairs that are paired with itself. After the user's demodulation assistance information, in the case where the receiver supports blind detection, other auxiliary information is further obtained by blind detection. After obtaining all the auxiliary information, the UE may demodulate the downlink data sent by the base station to other users paired with itself according to the extracted and/or blindly detected auxiliary information, and then perform interference cancellation, and finally, according to the first The demodulation information extracted by the downlink control message and/or other auxiliary information detected by the blind detection further demodulate the downlink data sent by the base station to itself.

如前所述，本实施例提供的下行控制信息的发送方法对现有的协议改动很小，且具有信令的开销小以及对UE接收机的复杂度要求不高等优点。As described above, the method for transmitting downlink control information provided in this embodiment has little change to the existing protocol, and has the advantages of low signaling overhead and low complexity of the UE receiver.

如前所述，在本发明的一个实施例中，在上述步骤202确定的第一UE的解调信息中可以不包括第一UE的资源分配RA信息。且由于本实施例中发送的第一下行控制消息中不包括第一UE的资源分配信息，因此，第一下行控制消息的长度将进一步减小，使得信令开销进一步减少。As described above, in one embodiment of the present invention, the resource allocation RA information of the first UE may not be included in the demodulation information of the first UE determined in the foregoing step 202. And the resource allocation of the first UE is not included in the first downlink control message sent in this embodiment. Information, therefore, the length of the first downlink control message will be further reduced, so that the signaling overhead is further reduced.

相对应地，这对这种方法，本发明的实施例还提供了另一种下行控制信息的接收方法，其流程如图6所示，主要包括以下过程。Correspondingly, in this method, the embodiment of the present invention further provides another method for receiving downlink control information, and the flow thereof is as shown in FIG. 6, and mainly includes the following process.

步骤502，UE从接收的第一下行控制消息中提取自身的解调辅助信息以及与自身配对的其他UE的解调辅助信息的长度。Step 502: The UE extracts its own demodulation assistance information and the length of demodulation assistance information of other UEs paired with itself from the received first downlink control message.

如前所述，在本步骤中提取的自身的解调信息中将不包含自身的资源分配信息。As described above, the self-demodulation information extracted in this step will not contain its own resource allocation information.

上述步骤501～505与图5所示的步骤501～505的实现方法是相同的，在此就不再赘述了。The above steps 501 to 505 are the same as the implementation methods of steps 501 to 505 shown in FIG. 5, and will not be described again.

步骤506，UE从与自身配对的其他用户的解调辅助信息中提取与自身配对的其他用户的资源分配信息。Step 506: The UE extracts resource allocation information of other users paired with itself from demodulation auxiliary information of other users paired with itself.

步骤507，UE对与自身配对的其他用户的资源分配信息进行合并，确定自身的资源分配信息。Step 507: The UE combines resource allocation information of other users paired with itself to determine its own resource allocation information.

由此可以看出，虽然基站发送的该UE自身的解调信息中不包含的该UE的资源分配信息，但是由于与该UE配对的其他UE实际与该UE占用了相同的时频资源，因此，在确定了与该UE配对的其他UE的资源分配信息后，即可确定该UE的资源分配信息。也即UE 可以通过第二下行控制消息确定自身的资源分配信息。例如，与UE1配对的UE包括UE2和UE3，则第二下行控制信息中会包括UE2和UE3的资源分配信息。这样，UE1在收到第二下行控制信息后，可以确定为与之配对的UE2和UE3分配的时频资源，并将这些资源进行合并后，即可确定基站为自身UE1分配的时频资源。It can be seen that although the UE allocates the resource allocation information of the UE that is not included in the demodulation information of the UE itself, since other UEs paired with the UE actually occupy the same time-frequency resource with the UE, After determining the resource allocation information of other UEs paired with the UE, the resource allocation information of the UE may be determined. UE The resource allocation information of itself can be determined by the second downlink control message. For example, the UE that is paired with the UE1 includes the UE2 and the UE3, and the second downlink control information includes the resource allocation information of the UE2 and the UE3. In this way, after receiving the second downlink control information, the UE1 can determine the time-frequency resources allocated by the paired UE2 and the UE3, and combine the resources to determine the time-frequency resources allocated by the base station to the UE1.

由此可以看出，通过上述方法不仅可以完成下行控制信息的传输，且与在第一下行控制消息中携带第一UE的资源分配信息的方法相比，下行控制消息的长度将进一步减少，使得信令开销进一步减少。It can be seen that the transmission of the downlink control information can be completed not only by the method described above, but also the length of the downlink control message is further reduced compared with the method of carrying the resource allocation information of the first UE in the first downlink control message. The signaling overhead is further reduced.

相对应地，本发明的实施例还提供了实现上述方法的基站和用户终端。Correspondingly, embodiments of the present invention also provide a base station and a user terminal that implement the above method.

图7显示了本发明的实施例提供的基站。如图7所示，该基站主要包括：Figure 7 shows a base station provided by an embodiment of the present invention. As shown in FIG. 7, the base station mainly includes:

用户调度单元701，用于进行用户调度，确定与第一UE配对的第二UE。The user scheduling unit 701 is configured to perform user scheduling, and determine a second UE that is paired with the first UE.

解调信息确定单元702，用于确定上述第一UE的解调信息；其中，所述第一UE的解调信息用于由所述第一UE解调所述第一UE的下行数据。The demodulation information determining unit 702 is configured to determine demodulation information of the first UE, where the demodulation information of the first UE is used to demodulate downlink data of the first UE by the first UE.

解调辅助信息确定单元703，用于确定上述第二UE的解调辅助信息；其中，所述第二UE的解调辅助信息用于由所述第一UE解调所述第二UE的下行数据；Demodulation assistance information determining unit 703, configured to determine demodulation assistance information of the second UE, where demodulation assistance information of the second UE is used to demodulate downlink of the second UE by the first UE data;

信息长度确定单元704，用于确定第二UE的解调辅助信息的长度。The information length determining unit 704 is configured to determine the length of the demodulation auxiliary information of the second UE.

第一生成单元705，用于根据第一UE的解调信息以及第二UE解调辅助信息的长度生成第一下行控制消息。 The first generating unit 705 is configured to generate a first downlink control message according to the demodulation information of the first UE and the length of the second UE demodulation assistance information.

第二生成单元706，用于根据第二UE的解调辅助信息生成第二下行控制消息。The second generating unit 706 is configured to generate a second downlink control message according to the demodulation assistance information of the second UE.

发送单元707，用于将第一下行控制消息和第二下行控制消息发送给第一UE，其中，所述第一UE根据所述第二UE的解调辅助信息的长度接收所述第二下行控制消息。The sending unit 707 is configured to send the first downlink control message and the second downlink control message to the first UE, where the first UE receives the second according to the length of the demodulation auxiliary information of the second UE Downstream control message.

如前所述，为了进一步减小第二下行控制消息的长度，在本发明的一个实施例中，上述信息长度确定单元704可以进一步包括：As described above, in order to further reduce the length of the second downlink control message, in an embodiment of the present invention, the information length determining unit 704 may further include:

复用模式设定模块7041，用于预先定义一种以上的UE复用模式。The multiplexing mode setting module 7041 is configured to predefine one or more UE multiplexing modes.

分组模块7042，用于分别确定每个第二UE的复用模式，并按照各个第二UE的复用模式将第二UE进行分组，将复用模式相同的第二UE分为一组。The grouping module 7042 is configured to respectively determine a multiplexing mode of each second UE, and group the second UE according to the multiplexing mode of each second UE, and group the second UEs with the same multiplexing mode into one group.

长度确定模块7043，用于将第二UE的组数作为第二UE解调辅助信息的长度。The length determining module 7043 is configured to use the number of groups of the second UE as the length of the second UE demodulation auxiliary information.

如前所述，为了进一步减小第一下行控制消息的长度，上述解调信息确定单元702确定的上述第一UE的解调信息中可以不包括资源分配信息。As described above, in order to further reduce the length of the first downlink control message, the demodulation information determined by the demodulation information determining unit 702 may not include the resource allocation information in the demodulation information of the first UE.

需要说明的是，上述基站各个单元以及各个模块的具体实现方法可以参考图2所示的方法。It should be noted that the specific implementation methods of each unit and each module of the foregoing base station may refer to the method shown in FIG. 2 .

图8显示了本发明实施例所述的用户终端。如图8所示，该用户终端主要包括：FIG. 8 shows a user terminal according to an embodiment of the present invention. As shown in FIG. 8, the user terminal mainly includes:

接收单元801，用于接收第一下行控制消息和第二下行控制消息。The receiving unit 801 is configured to receive the first downlink control message and the second downlink control message.

信息提取单元802，用于从第一下行控制消息中提取自身的解调辅助信息以及配对UE的解调辅助信息的长度；以及用于从第二下行控制消息中提取配对UE的解调辅助信息；其中所述用户终端的解调信息用于由所述用户终端解调所述UE的下行数据；所述配对UE的解调辅助信息用于由所述用户终端解调所述配对UE的下行数据。The information extracting unit 802 is configured to extract, from the first downlink control message, the demodulation assistance information of the UE and the length of the demodulation assistance information of the paired UE, and the demodulation assistance for extracting the paired UE from the second downlink control message. Information; wherein the demodulation information of the user terminal is used to demodulate downlink data of the UE by the user terminal; The auxiliary information is used to demodulate downlink data of the paired UE by the user terminal.

消息长度确定单元803，用于根据配对UE的解调辅助信息的长度确定第二下行控制消息的长度，并将确定的第二下行控制消息的长度反馈给接收单元801用于接收第二下行控制消息。The message length determining unit 803 is configured to determine the length of the second downlink control message according to the length of the demodulation auxiliary information of the paired UE, and feed back the determined length of the second downlink control message to the receiving unit 801 for receiving the second downlink control. Message.

如前所述，为了减小第一下行控制消息的长度，基站侧可以不发送UE自身的资源分配信息，在这种情况下，UE还将进一步包括：As described above, in order to reduce the length of the first downlink control message, the base station side may not send the resource allocation information of the UE itself. In this case, the UE further includes:

资源分配信息提取单元804，用于从配对UE的解调辅助信息中提取与自身配对的其他用户的资源分配信息。The resource allocation information extracting unit 804 is configured to extract resource allocation information of other users paired with itself from the demodulation auxiliary information of the paired UE.

资源合并单元805，用于对配对UE的资源分配信息进行合并，确定自身的资源分配信息。The resource combining unit 805 is configured to combine the resource allocation information of the paired UE to determine its own resource allocation information.

需要说明的是，上述用户终端各个单元的具体实现方法可以参考图5以及图6所示的方法。It should be noted that the specific implementation methods of the foregoing units of the user terminal may refer to the methods shown in FIG. 5 and FIG. 6.

如前所述，本实施例提供的基站以及用户终端可以实现下行控制信息的传输，为采用非正交多址接入方式复用的用户终端进行干扰消除提供了足够的信息，且对现有的协议改动很小，更进一步具有信令的开销小以及对UE接收机的复杂度要求不高等优点。As described above, the base station and the user terminal provided in this embodiment can implement downlink control information transmission, and provide sufficient information for interference cancellation by the user terminal multiplexed by the non-orthogonal multiple access method, and The protocol changes are small, and further have the advantages of small signaling overhead and low complexity of the UE receiver.

本领域技术人员应当理解，本申请实施例的用户终端和基站中各处理单元的功能，可参照前述方法实施例的相关描述而理解，本申请实施例的用户终端和基站中各处理单元，可通过实现本申请实施例所述方法的软件在用户终端和基站上的运行而实现。It should be understood by those skilled in the art that the functions of the user terminals and the processing units in the base station in the embodiments of the present application can be understood by referring to the related descriptions of the foregoing method embodiments, and the user terminals in the embodiments of the present application and the processing units in the base station may be used. The software running the method described in the embodiment of the present application is implemented on a user terminal and a base station.

在本申请所提供的几个实施例中，应该理解到，所揭露的设备和方法，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个模块或组件可以结合，或可以集成到另一个***，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或模块的间接耦合或通信连接，可以是电性的、机械的或其它形式的。In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple modules or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed. In addition, each shown or discussed The coupling, or direct coupling, or communication connection of the components to each other may be an indirect coupling or communication connection through some interface, device or module, and may be electrical, mechanical or other.

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：移动存储设备、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing storage device includes the following steps: the foregoing storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. A medium that can store program code.

以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明保护的范围之内。 The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included in the present invention. Within the scope of protection.

Claims

一种控制信息发送方法，其特征在于，包括：A method for transmitting control information, comprising:

基站在进行用户调度确定与第一用户终端UE配对的第二UE后，确定所述第一UE的解调信息和所述第二UE的解调辅助信息；其中，所述第一UE的解调信息用于由所述第一UE解调所述第一UE的下行数据；所述第二UE的解调辅助信息用于由所述第一UE解调第二UE的下行数据；After performing the user scheduling to determine the second UE paired with the first user terminal UE, the base station determines demodulation information of the first UE and demodulation auxiliary information of the second UE, where the solution of the first UE is The tune information is used to demodulate the downlink data of the first UE by the first UE; the demodulation assistance information of the second UE is used to demodulate downlink data of the second UE by the first UE;

所述基站确定第二UE的解调辅助信息的长度；Determining, by the base station, a length of demodulation assistance information of the second UE;

所述基站将第一UE的解调信息以及第二UE解调辅助信息的长度通过第一下行控制消息发送给第一UE；以及Transmitting, by the base station, the demodulation information of the first UE and the length of the second UE demodulation auxiliary information to the first UE by using a first downlink control message;

所述基站将第二UE的解调辅助信息通过第二下行控制消息发送给第一UE；其中，所述第一UE根据所述第二UE的解调辅助信息的长度接收所述第二下行控制消息。The base station sends the demodulation assistance information of the second UE to the first UE by using a second downlink control message, where the first UE receives the second downlink according to the length of the demodulation auxiliary information of the second UE. Control messages.
根据权利要求1所述的方法，其特征在于，所述第一UE的解调信息包括：解调参考信号信息、调制编码方式信息、混合自动重传请求信息之一或其组合但不包括资源分配信息。The method according to claim 1, wherein the demodulation information of the first UE comprises: one of demodulation reference signal information, modulation and coding mode information, hybrid automatic repeat request information, or a combination thereof, but does not include resources. Assign information.
根据权利要求1所述的方法，其特征在于，所述第一UE的解调信息包括：资源分配信息、解调参考信号信息、调制编码方式信息、混合自动重传请求信息之一或其组合。The method according to claim 1, wherein the demodulation information of the first UE comprises: one of resource allocation information, demodulation reference signal information, modulation and coding mode information, hybrid automatic repeat request information, or a combination thereof. .
根据权利要求1所述的方法，其特征在于，确定所述第二UE的解调辅助信息包括：基站根据第一UE的接收机类型确定所述第二UE的解调辅助信息。The method according to claim 1, wherein determining the demodulation assistance information of the second UE comprises: determining, by the base station, demodulation assistance information of the second UE according to a receiver type of the first UE.
根据权利要求4所述的方法，其特征在于，所述解调辅助信息包括：发射功率分配信息、资源分配信息、解调参考信号信息、UE间干扰信息、调制级别、预编码向量、传输方案、调制编码方式信息、混合自动重传请求信息、传输块大小信息、解扰以及循环冗余校验信息之一或其组合。The method according to claim 4, wherein the demodulation assistance information comprises: transmit power allocation information, resource allocation information, demodulation reference signal information, inter-UE interference information, modulation level, precoding vector, and transmission scheme. Modulation coding information, mixing One or a combination of automatic retransmission request information, transport block size information, descrambling, and cyclic redundancy check information.
根据权利要求1至5中任一项权利要求所述的方法，其特征在于，所述确定第二UE的解调辅助信息的长度包括：将所述第二UE的数目作为所述第二UE的解调辅助信息的长度。The method according to any one of claims 1 to 5, wherein the determining the length of the demodulation assistance information of the second UE comprises: using the number of the second UE as the second UE The length of the demodulation auxiliary information.
根据权利要求1至5中任一项权利要求所述的方法，其特征在于，所述第二UE的数量为一个或者多个；所述确定第二UE的解调辅助信息的长度包括：对所述第二UE进行分组，以及将分组后所述第二UE的组数作为第二UE解调辅助信息的长度。The method according to any one of claims 1 to 5, wherein the number of the second UEs is one or more; the length of determining the demodulation assistance information of the second UE comprises: The second UE performs grouping, and the number of groups of the second UE after the grouping is used as the length of the second UE demodulation assistance information.
根据权利要求7所述的方法，其特征在于，所述对所述第二UE进行分组包括：The method according to claim 7, wherein the grouping the second UE comprises:

预先定义一种以上的UE复用模式；Predefining more than one UE multiplexing mode;

分别确定每个第二UE的复用模式；以及Determining a multiplexing mode of each second UE separately;

按照各个第二UE的复用模式将第二UE进行分组，将复用模式相同的第二UE分为一组。The second UEs are grouped according to the multiplexing mode of each of the second UEs, and the second UEs having the same multiplexing mode are grouped into one group.
根据权利要求8所述的方法，其特征在于，所述UE的复用模式由所述UE的解调辅助信息中的一项或一项以上信息确定。The method according to claim 8, wherein the multiplexing mode of the UE is determined by one or more pieces of information of demodulation assistance information of the UE.
根据权利要求9所述的方法，其特征在于，所述一项或一项以上信息包括UE的调制级别、调制编码方式信息、信道的秩Rank、解调参考信号信息、发射功率分配比例、混合自动重传请求信息以及传输块大小信息之一或其组合。The method according to claim 9, wherein the one or more pieces of information comprise a modulation level of the UE, modulation and coding mode information, a rank Rank of the channel, demodulation reference signal information, a transmission power allocation ratio, and a mixture. One or a combination of automatic retransmission request information and transport block size information.
根据权利要求1所述的方法，其特征在于，所述基站通过物理下行链路控制信道PDCCH或增强的物理下行链路控制信道EPDCCH将所述第一下行控制消息和第二下行控制消息发送给所述第一UE。 The method according to claim 1, wherein the base station sends the first downlink control message and the second downlink control message by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH. To the first UE.
一种控制信息接收方法，其特征在于，包括：A control information receiving method, comprising:

用户终端UE接收第一下行控制消息；The user terminal UE receives the first downlink control message;

所述UE从接收的第一下行控制消息中提取自身的解调信息以及配对UE的解调辅助信息的长度，其中，所述UE的解调信息用于由所述UE解调所述UE的下行数据；The UE extracts its own demodulation information and the length of the demodulation assistance information of the paired UE from the received first downlink control message, where the demodulation information of the UE is used to demodulate the UE by the UE Downstream data;

所述UE根据所述配对UE的解调辅助信息的长度确定第二下行控制消息的长度；Determining, by the UE, a length of the second downlink control message according to a length of the demodulation auxiliary information of the paired UE;

所述UE根据确定的第二下行控制消息的长度接收第二下行控制消息；Receiving, by the UE, the second downlink control message according to the determined length of the second downlink control message;

所述UE从所述第二下行控制消息中提取所述配对UE的解调辅助信息；其中所述UE根据所述配对UE的解调辅助信息解调所述配对UE的下行数据。And the UE extracts demodulation assistance information of the paired UE from the second downlink control message, where the UE demodulates downlink data of the paired UE according to demodulation assistance information of the paired UE.
根据权利要求12所述的方法，其特征在于，所述UE从物理下行链路控制信道PDCCH或增强的物理下行链路控制信道EPDCCH检测并接收所述第一下行控制消息和所述第二下行控制消息。The method according to claim 12, wherein the UE detects and receives the first downlink control message and the second from a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH. Downstream control message.
根据权利要求12或13所述的方法，其特征在于，所述配对UE的数量为一个或多个；所述方法进一步包括：The method according to claim 12 or 13, wherein the number of the paired UEs is one or more; the method further comprising:

所述UE从所述配对UE的解调辅助信息中提取所述一个或多个配对UE的资源分配信息；以及Extracting, by the UE, resource allocation information of the one or more paired UEs from demodulation assistance information of the paired UE;

所述UE对所述一个或多个配对UE的资源分配信息进行合并，确定自身的资源分配信息。The UE combines the resource allocation information of the one or more paired UEs to determine its own resource allocation information.
一种基站，其特征在于，包括：A base station, comprising:

用户调度单元，用于进行用户调度，确定与第一用户终端UE配对的第二UE； a user scheduling unit, configured to perform user scheduling, and determine a second UE that is paired with the first user terminal UE;

解调信息确定单元，用于确定所述第一UE的解调信息；其中，所述第一UE的解调信息用于由所述第一UE解调所述第一UE的下行数据；a demodulation information determining unit, configured to determine demodulation information of the first UE, where the demodulation information of the first UE is used to demodulate downlink data of the first UE by the first UE;

解调辅助信息确定单元，用于确定所述第二UE的解调辅助信息；其中，所述第二UE的解调辅助信息用于由所述第一UE解调所述第二UE的下行数据；a demodulation assistance information determining unit, configured to determine demodulation assistance information of the second UE, where demodulation assistance information of the second UE is used to demodulate downlink of the second UE by the first UE data;

信息长度确定单元，用于确定所述第二UE的解调辅助信息的长度；An information length determining unit, configured to determine a length of demodulation auxiliary information of the second UE;

第一生成单元，用于根据所述第一UE的解调信息以及第二UE解调辅助信息的长度生成第一下行控制消息；a first generating unit, configured to generate a first downlink control message according to the demodulation information of the first UE and the length of the second UE demodulation auxiliary information;

第二生成单元，用于根据所述第二UE的解调辅助信息生成第二下行控制消息；以及a second generating unit, configured to generate a second downlink control message according to the demodulation assistance information of the second UE;

发送单元，用于将所述第一下行控制消息和所述第二下行控制消息发送给第一UE，其中，所述第一UE根据所述第二UE的解调辅助信息的长度接收所述第二下行控制消息。a sending unit, configured to send the first downlink control message and the second downlink control message to the first UE, where the first UE receives the length according to the length of the demodulation auxiliary information of the second UE The second downlink control message is described.
根据权利要求15所述的基站，其特征在于，所述第二UE的数量为一个或多个，所述信息长度确定单元包括：The base station according to claim 15, wherein the number of the second UEs is one or more, and the information length determining unit comprises:

复用模式设定模块，用于预先定义一种以上的UE复用模式；a multiplexing mode setting module, configured to predefine more than one UE multiplexing mode;

分组模块，用于分别确定每个第二UE的复用模式，并按照各个第二UE的复用模式将所述第二UE进行分组，将复用模式相同的第二UE分为一组；a grouping module, configured to separately determine a multiplexing mode of each second UE, and group the second UE according to a multiplexing mode of each second UE, and group the second UEs with the same multiplexing mode into one group;

长度确定模块，用于将所述第二UE的组数作为所述第二UE解调辅助信息的长度。And a length determining module, configured to use the number of groups of the second UE as the length of the second UE demodulation auxiliary information.
根据权利要求15或16所述的基站，其特征在于，所述解调信息确定单元确定的所述第一UE的解调信息包括：解调参考信号信息、调制编码方式信息、混合自动重传请求信息之一或其组合但不包括资源分配信息。The base station according to claim 15 or 16, wherein the demodulation information of the first UE determined by the demodulation information determining unit comprises: demodulation reference signal information, modulation and coding mode information, and hybrid automatic retransmission. Request one or a combination of information but not a resource Assign information.
一种用户终端UE，其特征在于，包括：A user terminal UE, comprising:

接收单元，用于接收第一下行控制消息和第二下行控制消息；a receiving unit, configured to receive a first downlink control message and a second downlink control message;

信息提取单元，用于从第一下行控制消息中提取自身的解调信息以及配对UE的解调辅助信息的长度，以及用于从第二下行控制消息中提取与所述配对UE的解调辅助信息；其中所述UE的解调信息用于由所述UE解调所述UE的下行数据；所述配对UE的解调辅助信息用于由所述UE解调所述配对UE的下行数据；以及An information extracting unit, configured to extract, from the first downlink control message, demodulation information of the UE and the length of the demodulation assistance information of the paired UE, and to extract, from the second downlink control message, demodulation with the paired UE The auxiliary information; wherein the demodulation information of the UE is used to demodulate downlink data of the UE by the UE; and the demodulation auxiliary information of the paired UE is used to demodulate downlink data of the paired UE by the UE ;as well as

消息长度确定单元，用于根据所述配对UE的解调辅助信息的长度确定第二下行控制消息的长度，并将确定的第二下行控制消息的长度反馈给接收单元用于接收所述第二下行控制消息。a message length determining unit, configured to determine a length of the second downlink control message according to the length of the demodulation auxiliary information of the paired UE, and feed back the determined length of the second downlink control message to the receiving unit, to receive the second Downstream control message.
根据权利要求18所述的UE，其特征在于，所述配对UE的数量为一个或多个，所述UE进一步包括：The UE according to claim 18, wherein the number of the paired UEs is one or more, and the UE further comprises:

资源分配信息提取单元，用于从所述配对UE的解调辅助信息中提取所述一个或多个配对UE的资源分配信息；以及a resource allocation information extracting unit, configured to extract resource allocation information of the one or more paired UEs from demodulation assistance information of the paired UE;

资源合并单元，用于对所述一个或多个配对UE的资源分配信息进行合并，确定自身的资源分配信息。 And a resource merging unit, configured to combine resource allocation information of the one or more paired UEs to determine resource allocation information of the one.