CN111585708B - Method for determining multicast feedback resource, receiving node and sending node - Google Patents
Method for determining multicast feedback resource, receiving node and sending nodeDownload PDFInfo
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及通信技术领域，尤其是指一种组播反馈资源的确定方法、接收节点及发送节点。The present invention relates to the field of communication technologies, in particular to a method for determining multicast feedback resources, a receiving node and a sending node.
背景技术Background technique
V2X(vehicle to everything，车对外界的信息交换)技术借助车-车，车与路测基础设施、车与路人之间的无线通信，可实时感知车辆周边状况、共享道路信息并进行及时预警，已成为当前解决道路安全问题的一个研究热点。V2X (vehicle to everything, information exchange between vehicles and the outside world) technology can sense the surrounding conditions of vehicles in real time, share road information and give timely early warning by means of vehicle-to-vehicle, vehicle and road testing infrastructure, and wireless communication between vehicles and passers-by. It has become a research hotspot to solve road safety problems.
在现有的LTE(Long Term Evolution，长期演进)V2X技术中(Rel-14 LTE V2X技术)，在UE(User Equipment，用户设备)与UE之间传输数据的PC5接口(也称之为直通链路，协议上描述为Sidelink)广播通信已经可以支持基本的基于道路安全的业务的传输。In the existing LTE (Long Term Evolution, Long Term Evolution) V2X technology (Rel-14 LTE V2X technology), a PC5 interface (also called a straight-through link) that transmits data between a UE (User Equipment, user equipment) and the UE Road, the protocol is described as Sidelink) broadcast communication can already support the transmission of basic road safety-based services.
随着车联网技术的进一步发展，NR V2X现阶段相比LTE V2X，新的一些应用场景的出现，例如：车辆编队、高级驾驶、传感器信息共享、以及远程控制等应用。对于LTEsidelink广播通信不需要接收端进行重传反馈，然而对于单播以及组播，为了提升资源的利用率，希望引入反馈机制来控制发送端的重传次数。With the further development of the Internet of Vehicles technology, NR V2X now has some new application scenarios compared with LTE V2X, such as: vehicle formation, advanced driving, sensor information sharing, and remote control applications. For LTE sidelink broadcast communication, the receiver does not need to perform retransmission feedback, but for unicast and multicast, in order to improve resource utilization, it is hoped to introduce a feedback mechanism to control the number of retransmissions at the transmitter.
R14 V2X并没有引入反馈，Uu接口上反馈的是UE和其驻留基站之间的反馈，可以看作一种单播的反馈。故现有技术中并没有针对组播的反馈过程设计。R14 V2X does not introduce feedback. The feedback on the Uu interface is the feedback between the UE and its resident base station, which can be regarded as a unicast feedback. Therefore, there is no feedback process design for multicast in the prior art.
发明内容SUMMARY OF THE INVENTION
本发明实施例的目的在于提供一种组播反馈资源的确定方法、接收节点及发送节点，以解决现有技术中组播反馈过程不完善的问题。The purpose of the embodiments of the present invention is to provide a method for determining multicast feedback resources, a receiving node and a sending node, so as to solve the problem of imperfect multicast feedback process in the prior art.
为了解决上述问题，本发明实施例提供一种组播反馈资源的确定方法，应用于组播的接收节点，包括：In order to solve the above problem, an embodiment of the present invention provides a method for determining multicast feedback resources, which is applied to a multicast receiving node, including:
接收组播的发送节点发送的指示信息，所述指示信息用于指示组播的第一反馈资源；receiving the indication information sent by the sending node of the multicast, where the indication information is used to indicate the first feedback resource of the multicast;
根据所述指示信息指示的第一反馈资源和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源。The dedicated feedback resource of the receiving node is determined according to the first feedback resource indicated by the indication information and the receiving intra-group number of the receiving node.
其中，同一个组内的不同接收节点的专用反馈资源为正交资源。The dedicated feedback resources of different receiving nodes in the same group are orthogonal resources.
其中，所述组播的第一反馈资源为：时频资源；Wherein, the first feedback resource of the multicast is: time-frequency resource;
所述接收节点的专用反馈资源为：专用时频码字资源。The dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
其中，所述方法还包括：Wherein, the method also includes:
接收所述发送节点或高层配置的资源复用系数，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；Receive a resource multiplexing coefficient configured by the sending node or a higher layer, where the resource multiplexing coefficient is: the maximum number of code division multiplexing nodes of the first feedback resource;
若所述资源复用系数大于或者等于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：将所述第一反馈资源的不同码字分配给不同的接收节点；If the resource multiplexing coefficient is greater than or equal to the total number of valid receiving nodes in the group, the principle of determining the allocation of the first feedback resource is: allocating different codewords of the first feedback resource to different receiving nodes;
若所述资源复用系数小于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：根据所述有效接收节点的总个数对所述第一反馈资源的频域进行划分得到至少两个子反馈资源，将子反馈资源的不同码字分配给不同的接收节点。If the resource multiplexing coefficient is less than the total number of valid receiving nodes in the group, the principle of determining the allocation of the first feedback resource is: according to the total number of valid receiving nodes, the frequency domain of the first feedback resource is determined. The division is performed to obtain at least two sub-feedback resources, and different codewords of the sub-feedback resources are allocated to different receiving nodes.
其中，所述高层配置的资源复用系数包括：Wherein, the resource multiplexing coefficient configured by the high layer includes:
通过PC5接口在组播连接建立过程中配置的资源复用系数；The resource reuse factor configured during the establishment of the multicast connection through the PC5 interface;
或者，or,
通过系统Uu接口配置的资源复用系数。Resource reuse factor configured through the system Uu interface.
其中，所述根据所述指示信息指示的第一反馈资源和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源，包括；Wherein, determining the dedicated feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving node's internal number in the receiving group includes;
根据确定的所述第一反馈资源的分配原则和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源的码字信息和/或频域信息。The codeword information and/or frequency domain information of the dedicated feedback resource of the receiving node is determined according to the determined allocation principle of the first feedback resource and the receiving intra-group number of the receiving node.
其中，所述方法还包括：Wherein, the method also includes:
接收发送节点为所述接收节点分配的组建立组内编号；The receiving and sending node establishes an intra-group number for the group allocated by the receiving node;
或者，or,
接收网络侧设备为所述接收节点分配的组建立组内编号。The receiving network-side device establishes an intra-group number for the group allocated by the receiving node.
其中，所述方法还包括：Wherein, the method also includes:
根据所述接收节点的组建立组内编号，以及，组内有效接收节点的组建立组内编号以及组内有效接收节点的个数，确定所述接收节点在组内的接收组内编号。The receiving group number of the receiving node in the group is determined according to the group establishment group number of the receiving node, the group establishment group number of the valid receiving nodes in the group, and the number of valid receiving nodes in the group.
其中，所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值。The size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value.
本发明实施例还提供一种组播反馈资源的确定方法，应用于组播的发送节点，包括：An embodiment of the present invention also provides a method for determining multicast feedback resources, which is applied to a multicast sending node, including:
确定组播的第一反馈资源；determining the first feedback resource for multicast;
向组播的接收节点发送指示信息，所述指示信息用于指示组播的第一反馈资源。Sending indication information to the multicast receiving node, where the indication information is used to indicate the first feedback resource of the multicast.
其中，所述确定组播的第一反馈资源，包括：Wherein, the determining the first feedback resource for multicast includes:
根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小，确定组播所需的反馈资源的大小；其中，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；The size of the feedback resources required for multicast is determined according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient, and the size of the pre-configured frequency domain resources of the dedicated feedback resources of the receiving nodes; wherein, the resource multiplexing The coefficient is: the maximum number of code division multiplexing nodes of the first feedback resource;
根据所述组播所需的反馈资源的大小，确定组播的第一反馈资源。The first feedback resource of the multicast is determined according to the size of the feedback resource required for the multicast.
其中，所述根据所述组播所需的反馈资源的大小，确定组播的第一反馈资源，包括：Wherein, determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast includes:
向网络侧设备指示所述组播所需的反馈资源的大小，并确定网络侧设备根据所述组播所需的反馈资源的大小为组播分配的第一反馈资源；Indicating the size of the feedback resource required by the multicast to the network side device, and determining the first feedback resource allocated by the network side device for the multicast according to the size of the feedback resource required by the multicast;
或者，or,
根据所述组播所需的反馈资源的大小，自主确定组播的第一反馈资源。According to the size of the feedback resource required for the multicast, the first feedback resource for the multicast is autonomously determined.
其中，所述确定组播的第一反馈资源，包括：Wherein, the determining the first feedback resource for multicast includes:
向网络侧设备指示组内有效接收节点的总个数；Indicate the total number of valid receiving nodes in the group to the network side device;
确定网络侧设备根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小为组播分配的第一反馈资源。Determine the first feedback resource allocated by the network side device for multicast according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient, and the size of the frequency domain resource of the preconfigured receiving node's dedicated feedback resources.
其中，所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值。The size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value.
其中，所述资源复用系数为：Wherein, the resource multiplexing coefficient is:
通过PC5接口在组播连接建立过程中配置的资源复用系数；The resource reuse factor configured during the establishment of the multicast connection through the PC5 interface;
或者，or,
通过系统Uu接口配置的资源复用系数。Resource reuse factor configured through the system Uu interface.
本发明实施例还提供一种接收节点，包括：收发机、存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，所述收发机用于：接收组播的发送节点发送的指示信息，所述指示信息用于指示组播的第一反馈资源；An embodiment of the present invention further provides a receiving node, including: a transceiver, a memory, a processor, and a program stored in the memory and running on the processor, the transceiver being used for: receiving multicast data indication information sent by the sending node, where the indication information is used to indicate the first feedback resource of the multicast;
所述处理器用于读取存储器中的程序，执行下列过程：根据所述指示信息指示的第一反馈资源和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源。The processor is configured to read the program in the memory, and perform the following process: determine the dedicated feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving group internal number of the receiving node.
其中，同一个组内的不同接收节点的专用反馈资源为正交资源。The dedicated feedback resources of different receiving nodes in the same group are orthogonal resources.
其中，所述组播的第一反馈资源为：时频资源；Wherein, the first feedback resource of the multicast is: time-frequency resource;
所述接收节点的专用反馈资源为：专用时频码字资源。The dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
其中，所述收发机还用于：Wherein, the transceiver is also used for:
接收所述发送节点或高层配置的资源复用系数，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；Receive a resource multiplexing coefficient configured by the sending node or a higher layer, where the resource multiplexing coefficient is: the maximum number of code division multiplexing nodes of the first feedback resource;
所述处理器还用于：The processor is also used to:
若所述资源复用系数大于或者等于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：将所述第一反馈资源的不同码字分配给不同的接收节点；If the resource multiplexing coefficient is greater than or equal to the total number of valid receiving nodes in the group, the principle of determining the allocation of the first feedback resource is: allocating different codewords of the first feedback resource to different receiving nodes;
若所述资源复用系数小于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：根据所述有效接收节点的总个数对所述第一反馈资源的频域进行划分得到至少两个子反馈资源，将子反馈资源的不同码字分配给不同的接收节点。If the resource multiplexing coefficient is less than the total number of valid receiving nodes in the group, the principle of determining the allocation of the first feedback resource is: according to the total number of valid receiving nodes, the frequency domain of the first feedback resource is determined. The division is performed to obtain at least two sub-feedback resources, and different codewords of the sub-feedback resources are allocated to different receiving nodes.
其中，所述高层配置的资源复用系数包括：Wherein, the resource multiplexing coefficient configured by the high layer includes:
通过PC5接口在组播连接建立过程中配置的资源复用系数；The resource reuse factor configured during the establishment of the multicast connection through the PC5 interface;
或者，or,
通过系统Uu接口配置的资源复用系数。Resource reuse factor configured through the system Uu interface.
其中，所述处理器还用于：Wherein, the processor is also used for:
根据确定的所述第一反馈资源的分配原则和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源的码字信息和/或频域信息。The codeword information and/or frequency domain information of the dedicated feedback resource of the receiving node is determined according to the determined allocation principle of the first feedback resource and the receiving intra-group number of the receiving node.
其中，所述收发机还用于：Wherein, the transceiver is also used for:
接收发送节点为所述接收节点分配的组建立组内编号；The receiving and sending node establishes an intra-group number for the group allocated by the receiving node;
或者，or,
接收网络侧设备为所述接收节点分配的组建立组内编号。The receiving network-side device establishes an intra-group number for the group allocated by the receiving node.
其中，所述处理器还用于：Wherein, the processor is also used for:
根据所述接收节点的组建立组内编号，以及，组内有效接收节点的组建立组内编号以及组内有效接收节点的个数，确定所述接收节点在组内的接收组内编号。The receiving group number of the receiving node in the group is determined according to the group establishment group number of the receiving node, the group establishment group number of the valid receiving nodes in the group, and the number of valid receiving nodes in the group.
其中，所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值。The size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value.
本发明实施例还提供一种组播反馈资源的确定装置，应用于组播的接收节点，包括：An embodiment of the present invention also provides a device for determining multicast feedback resources, which is applied to a multicast receiving node, including:
接收模块，用于接收组播的发送节点发送的指示信息，所述指示信息用于指示组播的第一反馈资源；a receiving module, configured to receive indication information sent by a multicast sending node, where the indication information is used to indicate the first feedback resource of the multicast;
第一确定模块，用于根据所述指示信息指示的第一反馈资源和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源。A first determining module, configured to determine the dedicated feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving intra-group number of the receiving node.
本发明实施例还提供一种发送节点，包括：收发机、存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，所述处理器用于读取存储器中的程序，执行下列过程：确定组播的第一反馈资源；An embodiment of the present invention further provides a sending node, including: a transceiver, a memory, a processor, and a program stored in the memory and running on the processor, where the processor is configured to read the program in the memory , and perform the following process: determine the first feedback resource of the multicast;
所述收发机用于向组播的接收节点发送指示信息，所述指示信息用于指示组播的第一反馈资源。The transceiver is configured to send indication information to a multicast receiving node, where the indication information is used to indicate the first feedback resource of the multicast.
其中，所述处理器还用于：Wherein, the processor is also used for:
根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小，确定组播所需的反馈资源的大小；其中，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；The size of the feedback resources required for multicast is determined according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient, and the size of the pre-configured frequency domain resources of the dedicated feedback resources of the receiving nodes; wherein, the resource multiplexing The coefficient is: the maximum number of code division multiplexing nodes of the first feedback resource;
根据所述组播所需的反馈资源的大小，确定组播的第一反馈资源。The first feedback resource of the multicast is determined according to the size of the feedback resource required for the multicast.
其中，所述处理器还用于：Wherein, the processor is also used for:
向网络侧设备指示所述组播所需的反馈资源的大小，并确定网络侧设备根据所述组播所需的反馈资源的大小为组播分配的第一反馈资源；Indicating the size of the feedback resource required by the multicast to the network side device, and determining the first feedback resource allocated by the network side device for the multicast according to the size of the feedback resource required by the multicast;
或者，or,
根据所述组播所需的反馈资源的大小，自主确定组播的第一反馈资源。According to the size of the feedback resource required for the multicast, the first feedback resource for the multicast is autonomously determined.
其中，所述收发机还用于：Wherein, the transceiver is also used for:
向网络侧设备指示组内有效接收节点的总个数；Indicate the total number of valid receiving nodes in the group to the network side device;
所述处理器还用于：The processor is also used to:
确定网络侧设备根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小为组播分配的第一反馈资源。Determine the first feedback resource allocated by the network side device for multicast according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient, and the size of the frequency domain resource of the preconfigured receiving node's dedicated feedback resources.
其中，所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值。The size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value.
其中，所述资源复用系数为：Wherein, the resource multiplexing coefficient is:
通过PC5接口在组播连接建立过程中配置的资源复用系数；The resource reuse factor configured during the establishment of the multicast connection through the PC5 interface;
或者，or,
通过系统Uu接口配置的资源复用系数。Resource reuse factor configured through the system Uu interface.
本发明实施例还提供一种组播反馈资源的确定装置，应用于组播的发送节点，包括：An embodiment of the present invention also provides a device for determining multicast feedback resources, which is applied to a multicast sending node, including:
第二确定模块，用于确定组播的第一反馈资源；a second determining module, configured to determine the first feedback resource of the multicast;
发送模块，用于向组播的接收节点发送指示信息，所述指示信息用于指示组播的第一反馈资源。A sending module, configured to send indication information to a multicast receiving node, where the indication information is used to indicate the first feedback resource of the multicast.
本发明实施例还提供一种计算机可读存储介质，所述计算机可读存储介质上存储计算机程序，所述计算机程序被处理器执行时实现如上所述的组播反馈资源的确定方法的步骤。Embodiments of the present invention further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, implements the steps of the foregoing method for determining multicast feedback resources.
本发明的上述技术方案至少具有如下有益效果：The above-mentioned technical scheme of the present invention has at least the following beneficial effects:
本发明实施例的组播反馈资源的确定方法、接收节点及发送节点中，发送节点指示组播的第一反馈资源，接收节点根据自身的接收组内编号和发送节点指示的第一反馈资源，确定该接收节点的专用反馈资源，并在相应的专用反馈资源上发送反馈信息。In the method for determining multicast feedback resources, the receiving node, and the sending node according to the embodiment of the present invention, the sending node indicates the first feedback resource of the multicast, and the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, Dedicated feedback resources of the receiving node are determined, and feedback information is sent on the corresponding dedicated feedback resources.
附图说明Description of drawings
图1表示本发明实施例提供的组播反馈资源的确定方法的步骤流程图之一；FIG. 1 shows one of the flowcharts of the steps of a method for determining multicast feedback resources provided by an embodiment of the present invention;
图2表示本发明实施例提供的组播反馈资源的确定方法的步骤流程图之二；FIG. 2 shows the second flow chart of the steps of the method for determining multicast feedback resources provided by an embodiment of the present invention;
图3表示本发明实施例提供的接收节点和发送节点的结构示意图；3 is a schematic structural diagram of a receiving node and a sending node provided by an embodiment of the present invention;
图4表示本发明实施例提供的组播反馈资源的确定装置的结构示意图之一；FIG. 4 shows one of the schematic structural diagrams of an apparatus for determining multicast feedback resources provided by an embodiment of the present invention;
图5表示本发明实施例提供的组播反馈资源的确定装置的结构示意图之二。FIG. 5 shows the second schematic structural diagram of an apparatus for determining a multicast feedback resource provided by an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.
如图1所示，本发明实施例提供一种组播反馈资源的确定方法，应用于组播的接收节点，包括：As shown in FIG. 1 , an embodiment of the present invention provides a method for determining multicast feedback resources, which is applied to a multicast receiving node, including:
步骤11，接收组播的发送节点发送的指示信息，所述指示信息用于指示组播的第一反馈资源。Step 11: Receive indication information sent by the multicast sending node, where the indication information is used to indicate the first feedback resource of the multicast.
本步骤中，发送节点可通过SCI(Sidelink Control Information，直通链路控制信息)携带所述指示信息。接收节点对SCI进行译码，获取所述指示信息。In this step, the sending node may carry the indication information through SCI (Sidelink Control Information, direct link control information). The receiving node decodes the SCI to obtain the indication information.
步骤12，根据所述指示信息指示的第一反馈资源和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源。Step 12: Determine the dedicated feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving intra-group number of the receiving node.
进一步的，确定接收节点的专用反馈资源之后，接收节点根据PSSCH(PhysicalSidelink Shared Channel，物理直通链路共享信道)的接收情况，在相应的专用反馈资源上发送反馈信息。Further, after determining the dedicated feedback resources of the receiving node, the receiving node sends feedback information on the corresponding dedicated feedback resources according to the reception situation of PSSCH (Physical Sidelink Shared Channel, Physical Direct Link Shared Channel).
本发明实施例中，组播反馈为基于ACK(确认)或NACK(非确认)的反馈；即无论是正反馈还是负反馈接收节点都需要发送反馈信息。In the embodiment of the present invention, the multicast feedback is feedback based on ACK (acknowledgement) or NACK (non-acknowledgement); that is, whether it is positive feedback or negative feedback, the receiving node needs to send feedback information.
对于组播，ACK或NACK的目标就是可以区分ACK或NACK或DTX(非连续接收)的情况，即需要为每个接收节点分配专用的反馈资源。For multicast, the goal of ACK or NACK is to distinguish between ACK or NACK or DTX (discontinuous reception), that is, to allocate dedicated feedback resources for each receiving node.
可选的，本发明的上述实施例中，所述组播的第一反馈资源为：时频资源；所述接收节点的专用反馈资源为：专用时频码字资源。Optionally, in the above embodiment of the present invention, the first feedback resource of the multicast is: time-frequency resource; the dedicated feedback resource of the receiving node is: dedicated time-frequency codeword resource.
优选的，所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值。例如，专用反馈资源的频域资源的大小为m个物理资源块PRB。如m等于2。Preferably, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value. For example, the size of the frequency domain resource of the dedicated feedback resource is m physical resource blocks PRB. Such as m is equal to 2.
需要说明的是，组播的建立过程可以看做是每一个接收节点与发送节点的多个连接建立，连接建立形成一个组，该组内包括一个发送节点(也可称为簇头或组头)以及至少两个接收节点(也可称为簇成员或组成员)。其中，上述指示信息指示的第一反馈资源可以看做是为一个组分配的反馈资源，该组内的接收节点均可依据自身的接收组内编号从为该组分配的反馈资源内确定自身的专用反馈资源。It should be noted that the multicast establishment process can be regarded as the establishment of multiple connections between each receiving node and the sending node, and the connection establishment forms a group, which includes a sending node (also called a cluster head or a group head). ) and at least two receiving nodes (also referred to as cluster members or group members). The first feedback resource indicated by the above indication information can be regarded as a feedback resource allocated for a group, and the receiving nodes in the group can determine their own Dedicated feedback resources.
对于每一个接收节点的反馈，每一次只可能是一种反馈(ACK或NACK)，故每个接收节点的反馈可采用相同的时频资源，并通过不同的码字来区分是ACK还是NACK。For the feedback of each receiving node, only one kind of feedback (ACK or NACK) is possible at a time, so the feedback of each receiving node can use the same time-frequency resources, and use different code words to distinguish whether it is ACK or NACK.
对于组内的不同接收节点，同一个组内的不同接收节点的专用反馈资源为正交资源；即组内任意两个接收节点的专用反馈资源至少在频域或码字上是不同的。For different receiving nodes in a group, the dedicated feedback resources of different receiving nodes in the same group are orthogonal resources; that is, the dedicated feedback resources of any two receiving nodes in the group are different at least in frequency domain or codeword.
作为一个可选实施例，所述方法还包括：As an optional embodiment, the method further includes:
接收所述发送节点或高层配置的资源复用系数，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；该资源复用系数可以是预先配置的，也可以是连接建立过程中交互的，也可以由发送节点在SCI中显示指示，在此不做具体限定。Receive a resource multiplexing coefficient configured by the sending node or a higher layer, where the resource multiplexing coefficient is: the maximum number of code division multiplexing nodes for the first feedback resource; the resource multiplexing coefficient may be pre-configured, or It may be interactive during the connection establishment process, or may be indicated by the sending node in the SCI, which is not specifically limited here.
若所述资源复用系数大于或者等于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：将所述第一反馈资源的不同码字分配给不同的接收节点；If the resource multiplexing coefficient is greater than or equal to the total number of valid receiving nodes in the group, the principle of determining the allocation of the first feedback resource is: allocating different codewords of the first feedback resource to different receiving nodes;
若所述资源复用系数小于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：根据所述有效接收节点的总个数对所述第一反馈资源的频域进行划分得到至少两个子反馈资源，将子反馈资源的不同码字分配给不同的接收节点。If the resource multiplexing coefficient is less than the total number of valid receiving nodes in the group, the principle of determining the allocation of the first feedback resource is: according to the total number of valid receiving nodes, the frequency domain of the first feedback resource is determined. The division is performed to obtain at least two sub-feedback resources, and different codewords of the sub-feedback resources are allocated to different receiving nodes.
其中，所述高层配置的资源复用系数包括：Wherein, the resource multiplexing coefficient configured by the high layer includes:
通过PC5接口在组播连接建立过程中配置的资源复用系数；The resource reuse factor configured during the establishment of the multicast connection through the PC5 interface;
或者，or,
通过系统Uu接口配置的资源复用系数。Resource reuse factor configured through the system Uu interface.
承接上例，本发明的上述实施例中，步骤12包括；Continuing the above example, in the above-mentioned embodiment of the present invention,
根据确定的所述第一反馈资源的分配原则和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源的码字信息和/或频域信息。The codeword information and/or frequency domain information of the dedicated feedback resource of the receiving node is determined according to the determined allocation principle of the first feedback resource and the receiving intra-group number of the receiving node.
具体来说，每个资源上可以码分复用的终端的数量是有限的。Specifically, the number of terminals that can be code-division multiplexed on each resource is limited.
如果所述资源复用系数大于或者等于组内有效接收节点的总个数，则不同的接收节点在第一反馈资源上进行码分复用即可；例如，第一反馈资源上支持6个接收节点，对应的循环移位为：{0,6}{1,7}{2,8}{3,9}{4,10}{5,11}；分别对应接收节点1、接收节点2、接收节点3、接收节点4、接收节点5以及接收节点6。对于接收节点1，ACK则在时频资源(第一反馈资源)上对应的移位为0；对于接收节点2，NACK则在时频资源(第一反馈资源)上对应的移位为7。If the resource multiplexing coefficient is greater than or equal to the total number of valid receiving nodes in the group, different receiving nodes can perform code division multiplexing on the first feedback resource; for example, the first feedback resource supports 6 receiving nodes node, the corresponding cyclic shift is: {0,6}{1,7}{2,8}{3,9}{4,10}{5,11}; corresponding to receiving node 1, receiving
如果接收节点个数较多，即所述资源复用系数小于组内有效接收节点的总个数，则需要根据有效接收节点的总个数对第一反馈资源的频域进行划分得到至少两个子反馈资源，不同的接收节点在至少两个子反馈资源上进行码分复用。If the number of receiving nodes is large, that is, the resource multiplexing coefficient is less than the total number of valid receiving nodes in the group, it is necessary to divide the frequency domain of the first feedback resource according to the total number of valid receiving nodes to obtain at least two sub-systems. Feedback resources, different receiving nodes perform code division multiplexing on at least two sub-feedback resources.
例如，资源复用系数最大为6，有效接收节点的总个数为12，考虑为ACK/NACK分配不同的码字，则需要将第一反馈资源划分为第一子反馈资源和第二子反馈资源(子反馈资源的划分为对频域的划分)。For example, the maximum resource multiplexing factor is 6, and the total number of valid receiving nodes is 12. Considering allocating different codewords for ACK/NACK, the first feedback resource needs to be divided into the first sub-feedback resource and the second sub-feedback. Resources (the division of sub-feedback resources is the division of frequency domain).
例如，发送节点指示了第一反馈资源，该第一反馈资源为时域上1个TTI(transmission time interval，传输时间间隔)；频域上10个PRB(Physical ResourceBlock，物理资源块)。发送节点通过SCI指示了资源复用系数为6。For example, the sending node indicates the first feedback resource, where the first feedback resource is 1 TTI (transmission time interval, transmission time interval) in the time domain and 10 PRBs (Physical ResourceBlock, physical resource block) in the frequency domain. The sending node indicates that the resource multiplexing factor is 6 through the SCI.
如果接收节点获知有效接收节点的总个数为5。因为有效接收节点个数小于码分复用节点个数，则接收节点可以共享整个时频域资源，接收节点通过码字来正交区分足够。进一步的，接收节点根据自己的接收组内编号得到具体的码字信息，比如自己的接收组内编号为3，则码本使用3.If the receiving node knows that the total number of valid receiving nodes is 5. Because the number of effective receiving nodes is less than the number of code division multiplexing nodes, the receiving nodes can share the entire time-frequency domain resources, and it is sufficient for the receiving nodes to distinguish orthogonally through codewords. Further, the receiving node obtains specific codeword information according to its own receiving group number, for example, its own receiving group number is 3, then the codebook uses 3.
类似的，如果有效接收节点的总个数是10，因为有效接收节点个数大于码分复用节点个数，则认为第一反馈资源需要频分；例如认为连续的5个PRB是一份频域资源。然后根据接收节点的组内编号来确定具体的时频码资源。比如接收节点的接收组内编号是7；由于7大于码分复用节点个数6，则该接收节点采用第二份频域资源，且mode(7,6)＝1，故该接收节点的专用反馈资源为：第二份频域资源上第一个码字资源。Similarly, if the total number of valid receiving nodes is 10, because the number of valid receiving nodes is greater than the number of code division multiplexing nodes, it is considered that the first feedback resource needs frequency division; for example, five consecutive PRBs are considered to be a frequency division. domain resources. Then, the specific time-frequency code resource is determined according to the intra-group number of the receiving node. For example, the receiving node's receiving group number is 7; since 7 is greater than the number of CDMA nodes, 6, the receiving node uses the second frequency domain resource, and mode(7,6)=1, so the receiving node's The dedicated feedback resource is: the first codeword resource on the second frequency domain resource.
本发明的上述实施例中第一反馈资源的大分配原则为先码域分配再频域分配的原则，即先判断码域是否足够使用，若足够使用则仅对第一反馈资源进行码域分配；若码域不足够使用，则先对第一反馈资源进行频域划分，再对划分后的子时频资源进行码域分配。The principle of large allocation of the first feedback resources in the above-mentioned embodiments of the present invention is the principle of code domain allocation first and then frequency domain allocation, that is, it is judged first whether the code domain is sufficient for use, and if it is sufficient, only code domain allocation is performed on the first feedback resource ; If the code domain is not enough, firstly divide the first feedback resource in the frequency domain, and then allocate the divided sub-time-frequency resources in the code domain.
作为一个可选实施例，所述方法还包括：As an optional embodiment, the method further includes:
接收发送节点为所述接收节点分配的组建立组内编号；The receiving and sending node establishes an intra-group number for the group allocated by the receiving node;
或者，or,
接收网络侧设备为所述接收节点分配的组建立组内编号。The receiving network-side device establishes an intra-group number for the group allocated by the receiving node.
需要说明的是，组建立组内编号为组播建立过程中发送节点或网络侧设备为接收节点分配的编号，也可以称为绝对编号。It should be noted that the group establishment group number is the number assigned by the sending node or the network side device to the receiving node during the multicast establishment process, and may also be called an absolute number.
发送节点为接收节点分配组建立组内编号过程如下：The process for the sending node to assign a group to the receiving node to establish an intra-group number is as follows:
组播建立过程可以看做是每一个接收节点与发送节点的多个连接建立，连接建立过程中发送节点为加入的节点分配组建立组内编号。发送节点维护着整个组的一些信息，包括组大小以及每一个组成员的信息(组建立组内编号，能力等)。The multicast establishment process can be regarded as the establishment of multiple connections between each receiving node and the sending node. During the connection establishment process, the sending node assigns a group to the joined nodes to establish an intra-group number. The sending node maintains some information about the entire group, including group size and information about each group member (group establishment group number, capability, etc.).
当有节点加入，连接建立过程中，发送节点根据维护的信息，为该新加入的节点分配组建立组内编号(也可称为组内ID)，与蜂窝网C-RNTI不同的是，同一个组内的接收节点的组内ID尽可能保证连续性，即最大组内ID号与组大小是一致的。When a node joins, during the connection establishment process, the sending node assigns a group to the newly added node to establish an intra-group number (also called intra-group ID) according to the maintenance information. The intra-group IDs of the receiving nodes in a group should be as continuous as possible, that is, the maximum intra-group ID number is consistent with the group size.
发送节点为接收节点分配组内ID时，可以通过Sidelink RRC信令。该RRC信令是加密的，这样第三方不可知，保护了隐私。When the sending node assigns the intra-group ID to the receiving node, it can use Sidelink RRC signaling. The RRC signaling is encrypted so that the third party is agnostic and privacy is protected.
网络侧设备为接收节点分配组建立组内编号过程如下：The network-side device assigns a group to a receiving node to establish an intra-group numbering process as follows:
整个组播建立成组的过程是网络管理的。The entire process of establishing a multicast group is managed by the network.
当有节点需要加入一个组时，在成组过程中网络为其分配的初始的组内ID。这里的分配可以是网络NAS层(非接入层)分配。When a node needs to join a group, the initial group ID assigned by the network to it during the grouping process. The allocation here may be a network NAS layer (non-access stratum) allocation.
关于一个组一般包括两种场景：A group generally includes two scenarios:
场景一：完全静态的组，比如运营车队。对于场景一，接收节点的组建立组内编号不需要变更，一旦初始分配后就不会发生变更。Scenario 1: A completely static group, such as an operating fleet. For scenario 1, the group establishment group number of the receiving node does not need to be changed, and will not change once it is initially allocated.
场景二：半静态的组，允许加入组以及离开组。对于场景二，如果有节点加入，只对新接入的节点做初始ID的分配，不影响别的节点的ID；当有节点离开，则可能会影响别的节点的ID；需要通过高层信息，比如重配消息，保证接收节点的ID是连续的最新的(可选)。Scenario 2: Semi-static group, allowing to join and leave the group. For
例如，当有节点离开，发送节点根据维护的信息，确定受到影响的接收节点的集合；给受到影响的相应的接收节点重新分配组内ID，并且可以通过SL RRC信令更新组内ID。该RRC信令是加密的，这样第三方不可知，保护了隐私。当发送节点发出“更新ID信令”后，当收到对端接收节点的L1/R2/R3确认消息后，发送节点才认为此次更新有效。For example, when a node leaves, the sending node determines the set of affected receiving nodes according to the maintained information; reassigns intra-group IDs to the corresponding affected receiving nodes, and can update the intra-group IDs through SL RRC signaling. The RRC signaling is encrypted so that the third party is agnostic and privacy is protected. After the sending node sends "update ID signaling", the sending node considers the update to be valid only after receiving the L1/R2/R3 confirmation message from the receiving node at the opposite end.
进一步的，本发明的上述实施例中，所述方法还包括：Further, in the above-mentioned embodiment of the present invention, the method further includes:
根据所述接收节点的组建立组内编号(该组建立组内编号为最新的组建立组内编号，如初始分配的组建立组内编号或者更新完成后的组建立组内编号)，以及，组内有效接收节点的组建立组内编号以及组内有效接收节点的个数，确定所述接收节点在组内的接收组内编号。The intra-group number is established according to the group of the receiving node (the intra-group number for the group is the latest intra-group number, such as the initially allocated intra-group number or the group after the update is completed), and, The group of valid receiving nodes in the group establishes the intra-group number and the number of valid receiving nodes in the group, and determines the receiving group number of the receiving node in the group.
需要说明的是，接收组内编号为接收节点确定专用反馈资源所使用的编号，为了减少资源的浪费，本发明实施例中接收组内编号为接收节点在一个组内的相对编号，也可称为接收节点在一个组内的相对于有效节点的编号。It should be noted that the number in the receiving group is the number used by the receiving node to determine the dedicated feedback resources. In order to reduce the waste of resources, in the embodiment of the present invention, the number in the receiving group is the relative number of the receiving node in a group, which may also be called The number of the receiving node relative to the valid node within a group.
假如当前ID最大为11，但实际上组内成员才是8个，即有效ID是8个。比如{2，5，10}节点已经离开；{1，3，4，6，7，8，9，11}还在组内；If the current ID is up to 11, but in fact there are only 8 members in the group, that is, the effective ID is 8. For example, {2, 5, 10} nodes have left; {1, 3, 4, 6, 7, 8, 9, 11} are still in the group;
发送节点可以采用如下的指示：最大组大小(ID最大值)+组有效位图(bitmap)指示；其中，bitmap:10110111101；接收到该指示的接收节点可以获知组内有效接收节点的组建立组内编号以及组内有效接收节点的个数，从而可以确认所述接收节点在组内的接收组内编号。The sending node may use the following indication: maximum group size (maximum ID value) + group valid bitmap (bitmap) indication; wherein, bitmap: 10110111101; the receiving node that receives this indication can learn the group establishment group of valid receiving nodes in the group The internal number and the number of valid receiving nodes in the group can be confirmed, so that the receiving group internal number of the receiving node in the group can be confirmed.
例如，对于簇1，节点A为簇头(即发送节点)；节点B加入后，连接建立过程中簇头或者高层为其分配的组内ID为6。根据当前的发送节点的指示，节点B可以认为自己的相对组内ID为4，因为ID2和ID 5都已经离开这个组了。For example, for cluster 1, node A is the cluster head (ie, the sending node); after node B joins, the intra-group ID assigned to it by the cluster head or a higher layer during the connection establishment process is 6. According to the instruction of the current sending node, Node B can consider its relative intra-group ID to be 4, because both ID2 and ID5 have left this group.
通过上述确定接收节点的接收组内编号的过程，对于组内每一个接收节点均可以知道自己的相对的接收组内编号以及组内有效接收节点的大小。接收节点在选择自己的专用反馈资源时根据实际的大小以及接收组内编号来确定专用的时频码资源。Through the above process of determining the receiving group number of the receiving node, each receiving node in the group can know its own relative receiving group number and the size of the effective receiving node in the group. When selecting its own dedicated feedback resource, the receiving node determines the dedicated time-frequency code resource according to the actual size and the number within the receiving group.
需要说明的是，若接收节点的组建立组内编号只有初始维护，后续不做更新，有可能会出现组内编号不连续的情况，若接收节点不知道组内其他接收节点是否有效，则该接收节点可以根据初始维护的组建立组内编号来确定其专用反馈资源。It should be noted that if the group number of the receiving node is only for initial maintenance and does not update in the future, there may be a situation where the group number is discontinuous. If the receiving node does not know whether other receiving nodes in the group are valid, the The receiving node can determine its dedicated feedback resources according to the group establishment intra-group number initially maintained.
综上，本发明的上述实施例中，发送节点指示组播的第一反馈资源，接收节点根据自身的接收组内编号和发送节点指示的第一反馈资源，确定该接收节点的专用反馈资源，并在相应的专用反馈资源上发送反馈信息。To sum up, in the above embodiments of the present invention, the sending node indicates the first feedback resource of the multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, And send feedback information on the corresponding dedicated feedback resources.
如图2所示，本发明实施例还提供一种组播反馈资源的确定方法，应用于组播的发送节点，包括：As shown in FIG. 2 , an embodiment of the present invention further provides a method for determining multicast feedback resources, which is applied to a multicast sending node, including:
步骤21，确定组播的第一反馈资源；
步骤22，向组播的接收节点发送指示信息，所述指示信息用于指示组播的第一反馈资源。Step 22: Send indication information to the multicast receiving node, where the indication information is used to indicate the first feedback resource of the multicast.
本步骤中，发送节点可通过SCI(Sidelink Control Information，直通链路控制信息)携带所述指示信息。接收节点对SCI进行译码，获取所述指示信息。In this step, the sending node may carry the indication information through SCI (Sidelink Control Information, direct link control information). The receiving node decodes the SCI to obtain the indication information.
本发明实施例中，发送节点通过序列检测的方式来确定接收节点以及确定是对发送节点的反馈信息。In the embodiment of the present invention, the sending node determines the receiving node and the feedback information to the sending node by means of sequence detection.
本发明实施例中，组播反馈为基于ACK(确认)或NACK(非确认)的反馈；即无论是正反馈还是负反馈接收节点都需要发送反馈信息。In the embodiment of the present invention, the multicast feedback is feedback based on ACK (acknowledgement) or NACK (non-acknowledgement); that is, whether it is positive feedback or negative feedback, the receiving node needs to send feedback information.
对于组播，ACK或NACK的目标就是可以区分ACK或NACK或DTX(非连续接收)的情况，即需要为每个接收节点分配专用的反馈资源。For multicast, the goal of ACK or NACK is to distinguish between ACK or NACK or DTX (discontinuous reception), that is, to allocate dedicated feedback resources for each receiving node.
可选的，本发明的上述实施例中，所述组播的第一反馈资源为：时频资源。Optionally, in the above embodiment of the present invention, the first feedback resource of the multicast is: time-frequency resource.
第一反馈资源的确定方式如下：The method for determining the first feedback resource is as follows:
方式一：发送节点根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小，确定组播所需的反馈资源的大小；其中，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；Mode 1: The sending node determines the size of the feedback resources required by the multicast according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient, and the size of the pre-configured frequency domain resources of the dedicated feedback resources of the receiving nodes; wherein, The resource multiplexing coefficient is: the maximum number of code division multiplexing nodes of the first feedback resource;
根据所述组播所需的反馈资源的大小，确定组播的第一反馈资源。The first feedback resource of the multicast is determined according to the size of the feedback resource required for the multicast.
需要说明的是，此种方式下，资源复用系数由方发送节点确定，资源复用系数的取值可与拥塞测量结果相关。该资源复用系数可以是预先配置的，也可以是连接建立过程中交互的，在此不做具体限定；该资源复用系数也可以为一个固定值。所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值，例如m个PRB。It should be noted that, in this manner, the resource multiplexing coefficient is determined by the sending node, and the value of the resource multiplexing coefficient may be related to the congestion measurement result. The resource multiplexing coefficient may be pre-configured, or may be exchanged during the connection establishment process, which is not specifically limited here; the resource multiplexing coefficient may also be a fixed value. The size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value, such as m PRBs.
此种方式下，所述根据所述组播所需的反馈资源的大小，确定组播的第一反馈资源，包括：In this manner, determining the first feedback resource for multicast according to the size of the feedback resource required by the multicast includes:
向网络侧设备指示所述组播所需的反馈资源的大小，并确定网络侧设备根据所述组播所需的反馈资源的大小为组播分配的第一反馈资源；即基站分配资源的模式；Indicate the size of the feedback resources required by the multicast to the network side device, and determine the first feedback resource allocated by the network side device for the multicast according to the size of the feedback resources required by the multicast; that is, the mode in which the base station allocates resources ;
或者，根据所述组播所需的反馈资源的大小，自主确定组播的第一反馈资源；即发送节点自主选择资源的模式。Alternatively, according to the size of the feedback resources required for the multicast, the first feedback resource of the multicast can be autonomously determined; that is, a mode in which the sending node autonomously selects the resources.
优选的，所述资源复用系数包括：Preferably, the resource multiplexing coefficient includes:
通过PC5接口在组播连接建立过程中配置的资源复用系数；或者，通过系统Uu接口配置的资源复用系数。The resource multiplexing factor configured through the PC5 interface during the establishment of the multicast connection; or, the resource multiplexing factor configured through the system Uu interface.
方式二：发送节点上报组内的有效接收节点的个数，由网络侧设备确定具体的反馈资源的大小。即步骤21包括：Mode 2: The sending node reports the number of valid receiving nodes in the group, and the network side device determines the size of the specific feedback resource. That is,
向网络侧设备指示组内有效接收节点的总个数；Indicate the total number of valid receiving nodes in the group to the network side device;
确定网络侧设备根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小为组播分配的第一反馈资源。Determine the first feedback resource allocated by the network side device for multicast according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient, and the size of the frequency domain resource of the preconfigured receiving node's dedicated feedback resources.
系统预配置资源复用系数或者基站来确定资源复用系数。资源复用系数的取值由基站根据DCC(数据通信信道)上报和/或支持的节点数两个因素来确定，资源分配时动态指示给节点；或者采用预配置的方式，静态预配置或者半静态方式通过RRC信令生效。The resource multiplexing coefficient is preconfigured by the system or the base station determines the resource multiplexing coefficient. The value of the resource multiplexing coefficient is determined by the base station according to two factors, the number of nodes reported and/or supported by the DCC (Data Communication Channel), and is dynamically indicated to the nodes during resource allocation; Static mode takes effect through RRC signaling.
所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值，例如m个PRB。The size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value, such as m PRBs.
例如，预先预定专用反馈资源的频域资源的大小为2个PRB，资源复用系数为8，组内有效接收节点的总个数为6，则第一反馈资源的频域大小为2个PRB；再例如，组内有效接收节点的总个数为10，则第一反馈资源的频域大小为4个PRB等，在此不一一枚举。For example, the size of the frequency domain resource of the pre-predetermined dedicated feedback resource is 2 PRBs, the resource multiplexing coefficient is 8, and the total number of valid receiving nodes in the group is 6, then the frequency domain size of the first feedback resource is 2 PRBs For another example, if the total number of valid receiving nodes in the group is 10, the frequency domain size of the first feedback resource is 4 PRBs, etc., which are not enumerated here.
作为一个可选实施例，发送节点在确知的反馈资源上，通过序列检测，可以得到每一个接收节点是否做了反馈(DTX)，以及具体的反馈情况(ACK或者NACK)。进一步的，发送节点可以采用差异化的重传方式，即可以根据确定的终端来确定重传的资源，采用非自适应重传，比如调整MCS(Modulation and Coding Scheme，调制与编码策略)，调整RV(Redundancy Version，冗余版本)等。As an optional embodiment, the sending node can obtain whether each receiving node has performed feedback (DTX) and the specific feedback situation (ACK or NACK) through sequence detection on the known feedback resources. Further, the sending node can adopt a differentiated retransmission method, that is, it can determine the retransmission resources according to the determined terminal, and adopt non-adaptive retransmission, such as adjusting MCS (Modulation and Coding Scheme, modulation and coding strategy), adjust RV (Redundancy Version, redundancy version) and so on.
对于发送节点而言，发送节点可以根据实际的反馈节点个数以及应该反馈节点个数来确定是否有非连续接收DTX用户。例如，发送节点的序列检测是确定个数的，与实际的用户个数是一致的；再例如，序列检测次数是根据组内最大ID来确定的，是大于实际的用户个数的。For the sending node, the sending node may determine whether there are discontinuous DTX users according to the actual number of feedback nodes and the number of nodes that should be fed back. For example, the number of sequence detections of the sending node is determined, which is consistent with the actual number of users; for another example, the number of sequence detections is determined according to the largest ID in the group, which is greater than the actual number of users.
综上，本发明的上述实施例中，发送节点指示组播的第一反馈资源，接收节点根据自身的接收组内编号和发送节点指示的第一反馈资源，确定该接收节点的专用反馈资源，并在相应的专用反馈资源上发送反馈信息。To sum up, in the above embodiments of the present invention, the sending node indicates the first feedback resource of the multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, And send feedback information on the corresponding dedicated feedback resources.
如图3所示，本发明实施例还提供一种接收节点，包括：收发机320、存储器310、处理器300及存储在所述存储器310上并可在所述处理器300上运行的程序，所述收发机320用于：接收组播的发送节点发送的指示信息，所述指示信息用于指示组播的第一反馈资源；As shown in FIG. 3 , an embodiment of the present invention further provides a receiving node, including: a
所述处理器300用于读取存储器中的程序，执行下列过程：根据所述指示信息指示的第一反馈资源和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源。The
可选的，本发明的上述实施例中，同一个组内的不同接收节点的专用反馈资源为正交资源。Optionally, in the above-mentioned embodiment of the present invention, the dedicated feedback resources of different receiving nodes in the same group are orthogonal resources.
可选的，本发明的上述实施例中，所述组播的第一反馈资源为：时频资源；Optionally, in the foregoing embodiment of the present invention, the first feedback resource of the multicast is: time-frequency resource;
所述接收节点的专用反馈资源为：专用时频码字资源。The dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
可选的，本发明的上述实施例中，所述收发机320还用于：Optionally, in the foregoing embodiment of the present invention, the
接收所述发送节点或高层配置的资源复用系数，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；receiving a resource multiplexing coefficient configured by the sending node or a higher layer, where the resource multiplexing coefficient is: the maximum number of code division multiplexing nodes of the first feedback resource;
所述处理器300还用于：The
若所述资源复用系数大于或者等于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：将所述第一反馈资源的不同码字分配给不同的接收节点；If the resource multiplexing coefficient is greater than or equal to the total number of valid receiving nodes in the group, the principle of determining the allocation of the first feedback resource is: allocating different codewords of the first feedback resource to different receiving nodes;
若所述资源复用系数小于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：根据所述有效接收节点的总个数对所述第一反馈资源的频域进行划分得到至少两个子反馈资源，将子反馈资源的不同码字分配给不同的接收节点。If the resource multiplexing coefficient is less than the total number of valid receiving nodes in the group, the principle of determining the allocation of the first feedback resource is: according to the total number of valid receiving nodes, the frequency domain of the first feedback resource is determined. The division is performed to obtain at least two sub-feedback resources, and different codewords of the sub-feedback resources are allocated to different receiving nodes.
可选的，本发明的上述实施例中，所述高层配置的资源复用系数包括：Optionally, in the above embodiment of the present invention, the resource multiplexing coefficient configured by the high layer includes:
通过PC5接口在组播连接建立过程中配置的资源复用系数；The resource reuse factor configured during the establishment of the multicast connection through the PC5 interface;
或者，or,
通过系统Uu接口配置的资源复用系数。Resource reuse factor configured through the system Uu interface.
可选的，本发明的上述实施例中，所述处理器300还用于：Optionally, in the foregoing embodiment of the present invention, the
根据确定的所述第一反馈资源的分配原则和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源的码字信息和/或频域信息。The codeword information and/or frequency domain information of the dedicated feedback resource of the receiving node is determined according to the determined allocation principle of the first feedback resource and the receiving intra-group number of the receiving node.
可选的，本发明的上述实施例中，所述收发机320还用于：Optionally, in the foregoing embodiment of the present invention, the
接收发送节点为所述接收节点分配的组建立组内编号；The receiving and sending node establishes an intra-group number for the group allocated by the receiving node;
或者，or,
接收网络侧设备为所述接收节点分配的组建立组内编号。The receiving network-side device establishes an intra-group number for the group allocated by the receiving node.
可选的，本发明的上述实施例中，所述处理器300还用于：Optionally, in the foregoing embodiment of the present invention, the
根据所述接收节点的组建立组内编号，以及，组内有效接收节点的组建立组内编号以及组内有效接收节点的个数，确定所述接收节点在组内的接收组编内号。According to the group establishment group ID of the receiving node, the group establishment group ID of the valid receiving nodes in the group, and the number of valid receiving nodes in the group, the receiving group ID of the receiving node in the group is determined.
可选的，本发明的上述实施例中，所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值。Optionally, in the above embodiment of the present invention, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value.
综上，本发明的上述实施例中，发送节点指示组播的第一反馈资源，接收节点根据自身的接收组内编号和发送节点指示的第一反馈资源，确定该接收节点的专用反馈资源，并在相应的专用反馈资源上发送反馈信息。To sum up, in the above embodiments of the present invention, the sending node indicates the first feedback resource of the multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, And send feedback information on the corresponding dedicated feedback resources.
需要说明的是，本发明实施例提供的接收节点是能够执行上述组播反馈资源的确定方法的接收节点，则上述组播反馈资源的确定方法的所有实施例均适用于该接收节点，且均能达到相同或相似的有益效果。It should be noted that the receiving node provided by the embodiment of the present invention is a receiving node capable of executing the foregoing method for determining multicast feedback resources, and all embodiments of the foregoing method for determining multicast feedback resources are applicable to the receiving node, and all of them are applicable to the receiving node. can achieve the same or similar beneficial effects.
如图4所示，本发明实施例提供一种组播反馈资源的确定装置，应用于组播的接收节点，包括：As shown in FIG. 4 , an embodiment of the present invention provides an apparatus for determining multicast feedback resources, which is applied to a multicast receiving node, including:
接收模块41，用于接收组播的发送节点发送的指示信息，所述指示信息用于指示组播的第一反馈资源；a receiving
第一确定模块42，用于根据所述指示信息指示的第一反馈资源和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源。The first determining
可选的，本发明的上述实施例中，同一个组内的不同接收节点的专用反馈资源为正交资源。Optionally, in the above embodiment of the present invention, the dedicated feedback resources of different receiving nodes in the same group are orthogonal resources.
可选的，本发明的上述实施例中，所述组播的第一反馈资源为：时频资源；Optionally, in the foregoing embodiment of the present invention, the first feedback resource of the multicast is: time-frequency resource;
所述接收节点的专用反馈资源为：专用时频码字资源。The dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
可选的，本发明的上述实施例中，所述装置还包括：Optionally, in the above-mentioned embodiment of the present invention, the device further includes:
系数确定模块，用于接收所述发送节点或高层配置的资源复用系数，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；a coefficient determination module, configured to receive a resource multiplexing coefficient configured by the sending node or a higher layer, where the resource multiplexing coefficient is: the maximum number of code division multiplexing nodes of the first feedback resource;
第一分配确定模块，用于若所述资源复用系数大于或者等于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：将所述第一反馈资源的不同码字分配给不同的接收节点；A first allocation determining module, configured to determine the allocation principle of the first feedback resource if the resource multiplexing coefficient is greater than or equal to the total number of valid receiving nodes in the group: Words are allocated to different receiving nodes;
第二分配确定模块，用于若所述资源复用系数小于组内有效接收节点的总个数，确定所述第一反馈资源的分配原则为：根据所述有效接收节点的总个数对所述第一反馈资源的频域进行划分得到至少两个子反馈资源，将子反馈资源的不同码字分配给不同的接收节点。The second allocation determining module is configured to determine the allocation principle of the first feedback resource if the resource multiplexing coefficient is less than the total number of valid receiving nodes in the group: according to the total number of valid receiving nodes The frequency domain of the first feedback resource is divided to obtain at least two sub-feedback resources, and different codewords of the sub-feedback resources are allocated to different receiving nodes.
可选的，本发明的上述实施例中，所述高层配置的资源复用系数包括：Optionally, in the above embodiment of the present invention, the resource multiplexing coefficient configured by the high layer includes:
通过PC5接口在组播连接建立过程中配置的资源复用系数；The resource reuse factor configured during the establishment of the multicast connection through the PC5 interface;
或者，or,
通过系统Uu接口配置的资源复用系数。Resource reuse factor configured through the system Uu interface.
可选的，本发明的上述实施例中，所述第一确定模块包括；Optionally, in the foregoing embodiment of the present invention, the first determining module includes;
第一确定子模块，用于根据确定的所述第一反馈资源的分配原则和所述接收节点的接收组内编号，确定所述接收节点的专用反馈资源的码字信息和/或频域信息。A first determining submodule, configured to determine the codeword information and/or frequency domain information of the dedicated feedback resources of the receiving node according to the determined allocation principle of the first feedback resource and the receiving group number of the receiving node .
可选的，本发明的上述实施例中，所述装置还包括：Optionally, in the above-mentioned embodiment of the present invention, the device further includes:
编号接收模块，用于接收发送节点为所述接收节点分配的组建立组内编号；或者，用于接收网络侧设备为所述接收节点分配的组建立组内编号。The number receiving module is configured to receive the group allocated by the sending node to the receiving node to establish an intra-group number; or, configured to receive the group allocated by the network side device to the receiving node to establish the intra-group number.
可选的，本发明的上述实施例中，所述装置还包括：Optionally, in the above-mentioned embodiment of the present invention, the device further includes:
编号确定模块，用于根据所述接收节点的组建立组内编号，以及，组内有效接收节点的组建立组内编号以及组内有效接收节点的个数，确定所述接收节点在组内的接收组内编号。The number determination module is used to establish the group number according to the group of the receiving nodes, and, according to the group of valid receiving nodes in the group, establish the group number and the number of valid receiving nodes in the group, and determine the number of the receiving nodes in the group. Receive group number.
可选的，本发明的上述实施例中，所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值。Optionally, in the above embodiment of the present invention, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value.
综上，本发明的上述实施例中，发送节点指示组播的第一反馈资源，接收节点根据自身的接收组内编号和发送节点指示的第一反馈资源，确定该接收节点的专用反馈资源，并在相应的专用反馈资源上发送反馈信息。To sum up, in the above embodiments of the present invention, the sending node indicates the first feedback resource of the multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, And send feedback information on the corresponding dedicated feedback resources.
需要说明的是，本发明实施例提供的组播反馈资源的确定装置是能够执行上述组播反馈资源的确定方法的装置，则上述组播反馈资源的确定方法的所有实施例均适用于该装置，且均能达到相同或相似的有益效果。It should be noted that the apparatus for determining multicast feedback resources provided by the embodiments of the present invention is a device capable of executing the foregoing method for determining multicast feedback resources, and all the foregoing embodiments of the foregoing methods for determining multicast feedback resources are applicable to this apparatus , and can achieve the same or similar beneficial effects.
如图3所示，本发明实施例还提供一种发送节点，包括：收发机320、存储器310、处理器300及存储在所述存储器310上并可在所述处理器300上运行的程序，所述处理器300用于读取存储器中的程序，执行下列过程：确定组播的第一反馈资源；As shown in FIG. 3, an embodiment of the present invention further provides a sending node, including: a
所述收发机320用于向组播的接收节点发送指示信息，所述指示信息用于指示组播的第一反馈资源。The
可选的，本发明的上述实施例中，所述处理器300还用于：Optionally, in the foregoing embodiment of the present invention, the
根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小，确定组播所需的反馈资源的大小；其中，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；The size of the feedback resources required for multicast is determined according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient, and the size of the pre-configured frequency domain resources of the dedicated feedback resources of the receiving nodes; wherein the resource multiplexing The coefficient is: the maximum number of code division multiplexing nodes of the first feedback resource;
根据所述组播所需的反馈资源的大小，确定组播的第一反馈资源。The first feedback resource of the multicast is determined according to the size of the feedback resource required for the multicast.
可选的，本发明的上述实施例中，所述处理器300还用于：Optionally, in the foregoing embodiment of the present invention, the
向网络侧设备指示所述组播所需的反馈资源的大小，并确定网络侧设备根据所述组播所需的反馈资源的大小为组播分配的第一反馈资源；Indicating the size of the feedback resource required by the multicast to the network side device, and determining the first feedback resource allocated by the network side device for the multicast according to the size of the feedback resource required by the multicast;
或者，or,
根据所述组播所需的反馈资源的大小，自主确定组播的第一反馈资源。According to the size of the feedback resource required for the multicast, the first feedback resource for the multicast is autonomously determined.
可选的，本发明的上述实施例中，所述收发机320还用于：Optionally, in the foregoing embodiment of the present invention, the
向网络侧设备指示组内有效接收节点的总个数；Indicate the total number of valid receiving nodes in the group to the network side device;
所述处理器300还用于：The
确定网络侧设备根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小为组播分配的第一反馈资源。Determine the first feedback resource allocated by the network side device for multicast according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient, and the size of the frequency domain resource of the preconfigured receiving node's dedicated feedback resources.
可选的，本发明的上述实施例中，所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值。Optionally, in the above embodiment of the present invention, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value.
可选的，本发明的上述实施例中，所述资源复用系数包括：Optionally, in the above embodiment of the present invention, the resource multiplexing coefficient includes:
通过PC5接口在组播连接建立过程中配置的资源复用系数；The resource reuse factor configured during the establishment of the multicast connection through the PC5 interface;
或者，or,
通过系统Uu接口配置的资源复用系数。Resource reuse factor configured through the system Uu interface.
综上，本发明的上述实施例中，发送节点指示组播的第一反馈资源，接收节点根据自身的接收组内编号和发送节点指示的第一反馈资源，确定该接收节点的专用反馈资源，并在相应的专用反馈资源上发送反馈信息。To sum up, in the above embodiments of the present invention, the sending node indicates the first feedback resource of the multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, And send feedback information on the corresponding dedicated feedback resources.
需要说明的是，本发明实施例提供的发送节点是能够执行上述组播反馈资源的确定方法的发送节点，则上述组播反馈资源的确定方法的所有实施例均适用于该发送节点，且均能达到相同或相似的有益效果。It should be noted that the sending node provided by the embodiment of the present invention is a sending node capable of executing the foregoing method for determining multicast feedback resources, and all the foregoing embodiments of the method for determining multicast feedback resources are applicable to the sending node, and all of them are applicable to the sending node. can achieve the same or similar beneficial effects.
如图5所示，本发明实施例还提供一种组播反馈资源的确定装置，应用于组播的发送节点，包括：As shown in FIG. 5 , an embodiment of the present invention further provides a device for determining multicast feedback resources, which is applied to a multicast sending node, including:
第二确定模块51，用于确定组播的第一反馈资源；a second determining
发送模块52，用于向组播的接收节点发送指示信息，所述指示信息用于指示组播的第一反馈资源。The sending
可选的，本发明的上述实施例中，所述第二确定模块包括：Optionally, in the above embodiment of the present invention, the second determining module includes:
第二确定子模块，用于根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小，确定组播所需的反馈资源的大小；其中，所述资源复用系数为：所述第一反馈资源的最大码分复用节点个数；The second determination sub-module is used to determine the size of the feedback resources required for multicast according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient, and the size of the frequency domain resources of the pre-configured dedicated feedback resources of the receiving nodes ; wherein, the resource multiplexing coefficient is: the maximum number of code division multiplexing nodes of the first feedback resource;
第三确定子模块，用于根据所述组播所需的反馈资源的大小，确定组播的第一反馈资源。The third determination sub-module is configured to determine the first feedback resource of the multicast according to the size of the feedback resource required for the multicast.
可选的，本发明的上述实施例中，所述第三确定子模块包括：Optionally, in the above embodiment of the present invention, the third determination sub-module includes:
确定单元，用于向网络侧设备指示所述组播所需的反馈资源的大小，并确定网络侧设备根据所述组播所需的反馈资源的大小为组播分配的第一反馈资源；a determining unit, configured to indicate the size of the feedback resource required by the multicast to the network side device, and determine the first feedback resource allocated by the network side device for the multicast according to the size of the feedback resource required by the multicast;
或者，用于根据所述组播所需的反馈资源的大小，自主确定组播的第一反馈资源。Alternatively, it is used to autonomously determine the first feedback resource of the multicast according to the size of the feedback resource required for the multicast.
可选的，本发明的上述实施例中，所述第二确定模块包括：Optionally, in the above embodiment of the present invention, the second determining module includes:
第四确定子模块，用于向网络侧设备指示组内有效接收节点的总个数；a fourth determination submodule, used to indicate to the network side device the total number of valid receiving nodes in the group;
第五确定子模块，用于确定网络侧设备根据组内有效接收节点的总个数、资源复用系数以及预先配置的接收节点的专用反馈资源的频域资源的大小为组播分配的第一反馈资源。The fifth determination sub-module is used to determine the network side device according to the total number of valid receiving nodes in the group, the resource multiplexing coefficient and the pre-configured size of the frequency domain resources of the dedicated feedback resources of the receiving nodes for the multicast allocation. Feedback resources.
可选的，本发明的上述实施例中，所述接收节点的专用反馈资源的频域资源的大小为预配置的固定值。Optionally, in the above embodiment of the present invention, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a preconfigured fixed value.
可选的，本发明的上述实施例中，所述资源复用系数包括：Optionally, in the above embodiment of the present invention, the resource multiplexing coefficient includes:
通过PC5接口在组播连接建立过程中配置的资源复用系数；The resource reuse factor configured during the establishment of the multicast connection through the PC5 interface;
或者，or,
通过系统Uu接口配置的资源复用系数。Resource reuse factor configured through the system Uu interface.
综上，本发明的上述实施例中，发送节点指示组播的第一反馈资源，接收节点根据自身的接收组内编号和发送节点指示的第一反馈资源，确定该接收节点的专用反馈资源，并在相应的专用反馈资源上发送反馈信息。To sum up, in the above embodiments of the present invention, the sending node indicates the first feedback resource of the multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, And send feedback information on the corresponding dedicated feedback resources.
需要说明的是，本发明实施例提供的组播反馈资源的确定装置是能够执行上述组播反馈资源的确定方法的装置，则上述组播反馈资源的确定方法的所有实施例均适用于该装置，且均能达到相同或相似的有益效果。It should be noted that the apparatus for determining multicast feedback resources provided by the embodiments of the present invention is a device capable of executing the foregoing method for determining multicast feedback resources, and all the foregoing embodiments of the foregoing methods for determining multicast feedback resources are applicable to this apparatus , and can achieve the same or similar beneficial effects.
本发明实施例还提供一种计算机可读存储介质，所述计算机可读存储介质上存储计算机程序，所述计算机程序被处理器执行时实现如上所述的组播反馈资源的确定方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(RandomAccess Memory，简称RAM)、磁碟或者光盘等。Embodiments of the present invention further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the above-described method for determining multicast feedback resources is implemented Each process can achieve the same technical effect. In order to avoid repetition, it will not be repeated here. The computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like.
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本发明各个实施例所述的方法。From the description of the above embodiments, those skilled in the art can clearly understand that the method of the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, CD), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present invention.
上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本发明的保护之内。The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.
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