CN108768598B - Method and device for transmitting downlink control information in ultrahigh-reliability ultralow-time communication - Google Patents
Method and device for transmitting downlink control information in ultrahigh-reliability ultralow-time communicationDownload PDFInfo
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Abstract
Description
Translated fromChinese技术领域technical field
本申请涉及通信技术领域，特别是涉及一种超高可靠超低时通信中下行控制信息传输方法及装置。The present application relates to the field of communication technologies, and in particular, to a method and device for transmitting downlink control information in ultra-reliable and ultra-low time communication.
背景技术Background technique
URLLC(Ultra-Reliable and Low Latency Communications，超高可靠超低时延通信)是无线通信中的一种通信场景，主要针对时延要求以及可靠性较高的业务场景，具体包括的业务有：自动驾驶、辅助驾驶、工业自动控制和高优先级关键通信等。URLLC (Ultra-Reliable and Low Latency Communications, Ultra-Reliable and Low Latency Communications) is a communication scenario in wireless communication. It is mainly aimed at business scenarios with high latency requirements and high reliability. The specific services include: automatic Driving, assisted driving, industrial automation and high-priority critical communications, etc.
现有URLLC系统中数据的传输过程为：基站发送DCI(Downlink ControlInformation，下行控制信息)；UE(User Equipment，用户设备)接收DCI，并在DCI指示的时频域资源上发送/接收数据包；接收端接收数据并对接收的数据进行解码，将解码结果进行反馈。如果UE漏检DCI，基站将按照预先配置的发送次数重复发送DCI。The data transmission process in the existing URLLC system is: the base station sends DCI (Downlink Control Information, downlink control information); UE (User Equipment, user equipment) receives the DCI, and sends/receives data packets on the time-frequency domain resources indicated by the DCI; The receiving end receives the data and decodes the received data, and feeds back the decoding result. If the UE misses detection of DCI, the base station will repeatedly send the DCI according to the pre-configured sending times.
然而，UE漏检DCI时，基站按照预先配置的发送次数重复发送DCI，并不会对DCI的发送方式做出调整，如果发送DCI的时频域资源块上信号传输性能不好，每次都在这一时频域资源块上发送DCI，可能会使DCI传输次次失败，还会造成漏检。所以现有URLLC系统中DCI的传输可靠性不是很高。However, when the UE misses detection of DCI, the base station repeatedly sends DCI according to the pre-configured sending times, and does not adjust the sending method of DCI. Sending DCI on this time-frequency domain resource block may cause DCI transmission to fail several times, and may also cause missed detection. Therefore, the transmission reliability of DCI in the existing URLLC system is not very high.
发明内容SUMMARY OF THE INVENTION
本申请实施例的目的在于提供一种超高可靠超低时通信中下行控制信息传输方法及装置，以提高DCI传输的可靠性。具体技术方案如下：The purpose of the embodiments of the present application is to provide a method and apparatus for transmitting downlink control information in ultra-reliable and ultra-low time communication, so as to improve the reliability of DCI transmission. The specific technical solutions are as follows:
第一方面，提供了一种超高可靠超低时通信中下行控制信息传输的方法，所述方法应用于用户设备，所述方法包括：In a first aspect, a method for downlink control information transmission in ultra-reliable and ultra-low time communication is provided, the method is applied to user equipment, and the method includes:
接收基站发送的下行控制信息；Receive downlink control information sent by the base station;
对所述下行控制信息进行解码，并将所述下行控制信息的解码结果反馈给基站。The downlink control information is decoded, and the decoding result of the downlink control information is fed back to the base station.
可选的，所述将所述下行控制信息的解码结果反馈给基站之后，还包括：Optionally, after feeding back the decoding result of the downlink control information to the base station, the method further includes:
如果所述下行控制信息解码正确，则在所述下行控制信息指示的时频域资源上向所述基站发送数据或接收所述基站发送的数据。If the downlink control information is decoded correctly, send data to the base station or receive data sent by the base station on the time-frequency domain resource indicated by the downlink control information.
第二方面，提供了一种超高可靠超低时通信中下行控制信息传输的方法，所述方法应用于基站，所述方法包括：In a second aspect, a method for downlink control information transmission in ultra-reliable and ultra-low time communication is provided, the method is applied to a base station, and the method includes:
向用户设备发送下行控制信息；Send downlink control information to the user equipment;
如果接收到所述用户设备发送的表示所述下行控制信息解码正确的解码结果，则判定所述下行控制信息传输成功；否则，按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息。If a decoding result indicating that the downlink control information is correctly decoded and sent by the user equipment is received, it is determined that the transmission of the downlink control information is successful; otherwise, according to the preset downlink control information retransmission policy, the downlink control information is sent to the user equipment again. Downlink control information.
可选的，所述按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息，包括：Optionally, sending downlink control information to the user equipment again according to a preset downlink control information retransmission policy includes:
在控制资源集CORESET(control-resource set，控制资源集)内部配置的预设数目个时频域资源上，分别发送下行控制信息。Downlink control information is respectively sent on a preset number of time-frequency domain resources configured in a control resource set CORESET (control-resource set, control resource set).
可选的，所述按照预设下行控制信息重传策略，再次发送所述下行控制信息之后，还包括：Optionally, after the retransmission of the downlink control information according to the preset downlink control information retransmission policy, the method further includes:
如果所述下行控制信息传输成功，则在所述下行控制信息指示的时频域资源上向所述用户设备发送数据或接收所述用户设备发送的数据。If the transmission of the downlink control information is successful, send data to the user equipment or receive data sent by the user equipment on the time-frequency domain resources indicated by the downlink control information.
第三方面，提供了一种超高可靠超低时通信中下行控制信息传输的装置，所述装置应用于用户设备，所述装置包括：In a third aspect, a device for transmitting downlink control information in ultra-reliable and ultra-low time communication is provided, the device is applied to user equipment, and the device includes:
第一收发模块，用于接收基站发送的下行控制信息；a first transceiver module, configured to receive downlink control information sent by the base station;
第一处理模块，用于对所述下行控制信息进行解码；a first processing module, configured to decode the downlink control information;
所述第一收发模块，还用于将所述下行控制信息的解码结果反馈给基站。The first transceiver module is further configured to feed back the decoding result of the downlink control information to the base station.
可选的，所述第一收发模块还用于：Optionally, the first transceiver module is also used for:
如果所述下行控制信息解码正确，则在所述下行控制信息指示的时频域资源上向所述基站发送数据或接收所述基站发送的数据。If the downlink control information is decoded correctly, send data to the base station or receive data sent by the base station on the time-frequency domain resource indicated by the downlink control information.
第四方面，提供了一种超高可靠超低时通信中下行控制信息传输的装置，所述装置应用于基站，所述装置包括：In a fourth aspect, a device for transmission of downlink control information in ultra-reliable and ultra-low time communication is provided, the device is applied to a base station, and the device includes:
第二收发模块，用于向用户设备发送下行控制信息；a second transceiver module, configured to send downlink control information to the user equipment;
第二处理模块，用于如果接收到所述用户设备发送的表示所述下行控制信息解码正确的解码结果，则判定所述下行控制信息传输成功；否则，触发所述第二收发模块按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息。The second processing module is configured to determine that the transmission of the downlink control information is successful if the decoding result indicating that the downlink control information is correctly decoded and sent by the user equipment is received; otherwise, trigger the second transceiver module according to the preset The downlink control information retransmission strategy is to send the downlink control information to the user equipment again.
可选的，所述第二处理模块具体用于：Optionally, the second processing module is specifically used for:
触发所述第二收发模块在控制资源集CORESET内部配置的预设数目个时频域资源上，分别发送下行控制信息。Trigger the second transceiver module to send downlink control information respectively on a preset number of time-frequency domain resources configured in the control resource set CORESET.
可选的，所述装置还包括：Optionally, the device further includes:
数据收发模块，如果所述下行控制信息传输成功，则在所述下行控制信息指示的时频域资源上向所述用户设备发送数据或接收所述用户设备发送的数据。A data transceiver module, if the downlink control information is successfully transmitted, send data to the user equipment or receive data sent by the user equipment on the time-frequency domain resources indicated by the downlink control information.
本发明实施例提供的一种超高可靠超低时通信中下行控制信息传输的方法，可以在用户设备接收到DCI后立即对DCI进行解码，并将解码结果反馈给基站，如果基站没有接收到DCI解码正确的反馈，则CORESET内部配置多个时频域资源以更高聚合等级重复发送DCI，这样不仅降低了发送DCI的码率，还良好地实现了DCI在时域和/或频域上的分集，使得UE更加容易接收到DCI，有效提高了DCI传输的可靠性。A method for downlink control information transmission in ultra-reliable and ultra-low time communication provided by the embodiment of the present invention can decode the DCI immediately after the user equipment receives the DCI, and feed back the decoding result to the base station. If the DCI decodes the correct feedback, CORESET internally configures multiple time-frequency domain resources to repeatedly transmit DCI at a higher aggregation level, which not only reduces the code rate of transmitting DCI, but also effectively realizes the DCI in the time domain and/or frequency domain. The diversity of DCI makes it easier for the UE to receive DCI, which effectively improves the reliability of DCI transmission.
当然，实施本申请的任一产品或方法必不一定需要同时达到以上所述的所有优点。Of course, implementation of any product or method of the present application does not necessarily require achieving all of the above-described advantages simultaneously.
附图说明Description of drawings
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.
图1为本发明实施例提供的一种超高可靠超低时通信中下行控制信息传输的方法流程图；1 is a flowchart of a method for transmitting downlink control information in ultra-high reliability and ultra-low time communication according to an embodiment of the present invention;
图2为本发明实施例提供的一种短调度粒度下行数据传输示意图；FIG. 2 is a schematic diagram of downlink data transmission with short scheduling granularity according to an embodiment of the present invention;
图3为本发明实施例提供的一种短调度粒度下行数据传输示意图；3 is a schematic diagram of downlink data transmission with short scheduling granularity according to an embodiment of the present invention;
图4为本发明实施例提供的一种长调度粒度下行数据传输示意图；FIG. 4 is a schematic diagram of downlink data transmission with long scheduling granularity according to an embodiment of the present invention;
图5为本发明实施例提供的一种长调度时延上行数据传输示意图；FIG. 5 is a schematic diagram of uplink data transmission with long scheduling delay according to an embodiment of the present invention;
图6为本发明实施例提供的一种超高可靠超低时通信中下行控制信息传输的装置结构示意图；6 is a schematic structural diagram of an apparatus for transmitting downlink control information in ultra-reliable and ultra-low time communication according to an embodiment of the present invention;
图7为本发明实施例提供的一种超高可靠超低时通信中下行控制信息传输的装置结构示意图；7 is a schematic structural diagram of an apparatus for transmitting downlink control information in ultra-high reliability and ultra-low time communication according to an embodiment of the present invention;
图8为本发明实施例提供的一种终端的结构示意图；FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
图9为本发明实施例提供的一种服务器的结构示意图。FIG. 9 is a schematic structural diagram of a server according to an embodiment of the present invention.
具体实施方式Detailed ways
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
本发明实施例还提供了一种超高可靠超低时通信中下行控制信息传输的方法，该方法可以由用户设备和服务器共同实现。如图1所示，该方法可以包括以下步骤：The embodiment of the present invention also provides a method for downlink control information transmission in ultra-reliable and ultra-low time communication, and the method can be jointly implemented by the user equipment and the server. As shown in Figure 1, the method may include the following steps:
步骤101，基站向用户设备发送下行控制信息。
在实施中，基站在需要向用户设备发送数据或者基站需要用户设备向基站发送数据时，基站为该用户设备分配用于传输数据的时频域资源，然后根据为该用户设备分配的时频域资源，生成下行控制信息，进而将该下行控制信息发送给该用户设备。In implementation, when the base station needs to send data to the user equipment or the base station needs the user equipment to send data to the base station, the base station allocates time-frequency domain resources for data transmission to the user equipment, and then according to the time-frequency domain resources allocated for the user equipment resources, generate downlink control information, and then send the downlink control information to the user equipment.
步骤102，用户设备接收基站发送的下行控制信息。
步骤103，用户设备对所述下行控制信息进行解码，并将所述下行控制信息的解码结果反馈给基站。
在实施中，用户设备对接收到的下行控制信息进行解码，判断下行控制信息是否解码正确，得到下行控制信息的解码结果，并将解码结果反馈给基站。例如，用户设备可以对接收到的下行控制信息进行CRC(Cyclic Redundancy Check，循环冗余检查)校验，得到下行控制信息解码结果。如果解码正确则向基站反馈ACK(Acknowledgement，应答)信号；如果解码错误，则向基站反馈NACK(Not-acknowledgement，非应答)信号。In implementation, the user equipment decodes the received downlink control information, determines whether the downlink control information is decoded correctly, obtains a decoding result of the downlink control information, and feeds back the decoding result to the base station. For example, the user equipment may perform a CRC (Cyclic Redundancy Check, cyclic redundancy check) check on the received downlink control information to obtain a decoding result of the downlink control information. If the decoding is correct, an ACK (Acknowledgement, acknowledgement) signal is fed back to the base station; if the decoding is incorrect, a NACK (Not-acknowledgement, non-acknowledgement) signal is fed back to the base station.
这样，可以使得基站确定下行控制信息是否传输成功，以便做出相应的处理。In this way, the base station can be made to determine whether the downlink control information is successfully transmitted, so as to perform corresponding processing.
可选的，用户设备将所述下行控制信息的解码结果反馈给基站之后，如果所述下行控制信息解码正确，则用户设备在所述下行控制信息指示的时频域资源上向所述基站发送数据或接收所述基站发送的数据。Optionally, after the user equipment feeds back the decoding result of the downlink control information to the base station, if the downlink control information is decoded correctly, the user equipment sends to the base station on the time-frequency domain resources indicated by the downlink control information. data or receive data sent by the base station.
在实施中，如果下行控制信息解码正确，用户设备根据下行控制信息内容确定接收数据或者发送数据的时频域资源，在接收数据的时频域资源上接收基站发送的数据或者在发送数据的时频域资源上向基站发送数据。In implementation, if the downlink control information is decoded correctly, the user equipment determines the time-frequency domain resources for receiving data or transmitting data according to the content of the downlink control information, and receives the data sent by the base station on the time-frequency domain resources for receiving data or when sending data. Send data to the base station on frequency domain resources.
可选的，对于用户设备接收基站发送的数据的情况，用户设备在对基站发送的数据进行解码之后，可以将解码结果反馈给基站。Optionally, in the case where the user equipment receives data sent by the base station, after the user equipment decodes the data sent by the base station, the user equipment may feed back the decoding result to the base station.
在实施中，用户设备接收基站发送的数据，然后对基站发送的数据进行解码，如果解码正确则向基站反馈ACK信号；如果解码错误，则向基站反馈NACK信号。In implementation, the user equipment receives the data sent by the base station, then decodes the data sent by the base station, and feeds back an ACK signal to the base station if the decoding is correct; and feeds back a NACK signal to the base station if the decoding is wrong.
步骤104，基站如果接收到所述用户设备发送的表示所述下行控制信息解码正确的解码结果，则判定所述下行控制信息传输成功；否则，按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息。Step 104: If the base station receives the decoding result indicating that the downlink control information is correctly decoded and sent by the user equipment, it determines that the downlink control information is transmitted successfully; The user equipment sends downlink control information.
在实施中，基站发送下行控制信息后开始计时，如果在基站发送下行控制信息后的预设时长内，基站没有接收到下行控制信息的解码结果，表示下行控制信息传输失败，基站会按照预设下行控制信息重传策略再次向用户设备发送下行控制信息。如果在基站发送下行控制信息后的预设时长内，基站接收到下行控制信息解码结果且该解码结果表示下行控制信息解码错误，则下行控制信息传输失败，基站会按照预设下行控制信息重传策略再次向用户设备发送下行控制信息。如果在基站发送下行控制信息后的预设时长内，基站接收到下行控制信息解码结果且该解码结果表示下行控制信息解码正确，则判定下行控制信息传输成功。In the implementation, the base station starts timing after sending the downlink control information. If the base station does not receive the decoding result of the downlink control information within the preset time period after the base station sends the downlink control information, it means that the transmission of the downlink control information fails, and the base station will follow the preset time. The downlink control information retransmission policy sends the downlink control information to the user equipment again. If the base station receives the decoding result of the downlink control information within the preset time period after the base station sends the downlink control information, and the decoding result indicates that the downlink control information is decoded incorrectly, the transmission of the downlink control information fails, and the base station will retransmit the downlink control information according to the preset downlink control information. The policy sends downlink control information to the user equipment again. If the base station receives a decoding result of the downlink control information within a preset time period after the base station sends the downlink control information, and the decoding result indicates that the downlink control information is correctly decoded, it is determined that the transmission of the downlink control information is successful.
这样，基站可以根据下行控制信息的解码结果，迅速确定下行控制信息是否传输成功。如果下行控制信息传输失败，可以对当前的下行控制信息发送方式进行调整，增大下行控制信息传输的成功可能性，能有效提高下行控制信息传输的可靠性。In this way, the base station can quickly determine whether the downlink control information is successfully transmitted according to the decoding result of the downlink control information. If the transmission of the downlink control information fails, the current transmission mode of the downlink control information can be adjusted to increase the possibility of successful transmission of the downlink control information, which can effectively improve the reliability of the transmission of the downlink control information.
可选的，按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息的具体处理可以为：基站在控制资源集CORESET内部配置的预设数目个时频域资源上，分别发送下行控制信息。Optionally, according to the preset downlink control information retransmission policy, the specific process of sending the downlink control information to the user equipment again may be: the base station, on the preset number of time-frequency domain resources configured in the control resource set CORESET, respectively. Send downlink control information.
在实施中，基站根据当前的下行控制信息发送方式，对下行控制信息发送方式进行调整，在CORESET内部配置多个时频域资源，例如，在CORESET内部配置多个时域资源，或者在CORESET内部配置多个频域资源，或者在CORESET内部配置多个时域资源和多个频域资源，在CORESET内部配置的时频域资源上分别发送下行控制信息。In implementation, the base station adjusts the transmission mode of downlink control information according to the current transmission mode of downlink control information, and configures multiple time-frequency domain resources in CORESET, for example, configures multiple time domain resources in CORESET, or configures multiple time-domain resources in CORESET Configure multiple frequency domain resources, or configure multiple time domain resources and multiple frequency domain resources inside the CORESET, and send downlink control information respectively on the time-frequency domain resources configured inside the CORESET.
这样，在CORESET内部配置的多个时频域上以更高聚合等级采用重复的方式分别发送下行控制信息，降低了发送下行控制信息的码率，使得用户设备更加容易接收到下行控制信息，能有效提高下行控制信息传输的可靠性。In this way, the downlink control information is sent in a repeated manner at a higher aggregation level in multiple time-frequency domains configured inside CORESET, which reduces the code rate for sending downlink control information, makes it easier for the user equipment to receive the downlink control information, and can Effectively improve the reliability of downlink control information transmission.
可选的，按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息之后，如果所述下行控制信息传输成功，则基站在所述下行控制信息指示的时频域资源上向所述用户设备发送数据或接收所述用户设备发送的数据。Optionally, after sending the downlink control information to the user equipment again according to the preset downlink control information retransmission policy, if the downlink control information is successfully transmitted, the base station sends the downlink control information on the time-frequency domain resources indicated by the downlink control information. Sending data to the user equipment or receiving data sent by the user equipment.
在实施中，如果下行控制信息传输成功，基站根据下行控制信息内容确定接收数据或者发送数据的时频域资源，在接收数据的时频域资源上接收基站发送的数据或者在发送数据的时频域资源上向基站发送数据。In the implementation, if the transmission of downlink control information is successful, the base station determines the time-frequency domain resources for receiving data or transmitting data according to the content of the downlink control information, and receives the data sent by the base station on the time-frequency domain resources for receiving data or at the time-frequency domain of sending data. Send data to the base station on the domain resources.
针对URLLC系统中的不同场景，应用本发明的具体实施例如下:For different scenarios in the URLLC system, the specific embodiments of the present invention are as follows:
场景1：在短调度粒度下行数据传输场景下，本方案的具体过程如下：Scenario 1: In the short scheduling granularity downlink data transmission scenario, the specific process of this solution is as follows:
其中，短调度粒度指的是下行控制信息调度的的下行数据占据的OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号个数小于等于2。The short scheduling granularity refers to that the number of OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbols occupied by downlink data scheduled by the downlink control information is less than or equal to 2.
基站向用户设备发送下行控制信息；用户设备接收下行控制信息并对下行控制信息进行解码，如果下行控制信息解码成功，则向基站反馈ACK信号；如果下行控制信息解码失败，则向基站反馈NACK信号；如果基站收到ACK信号，则认为用户设备对下行控制信息解码成功，按照先前配置对下行控制信息和数据进行发送，如图2所示。如果基站并没有接收到ACK/NACK或者收到NACK，则认为用户设备漏检了下行控制信息，将在CORESET内部配置多个时频域资源重复发送下行控制信息，如图3所示。The base station sends downlink control information to the user equipment; the user equipment receives the downlink control information and decodes the downlink control information. If the downlink control information is decoded successfully, it feeds back an ACK signal to the base station; if the downlink control information fails to be decoded, it feeds back a NACK signal to the base station ; If the base station receives the ACK signal, it is considered that the user equipment successfully decodes the downlink control information, and sends the downlink control information and data according to the previous configuration, as shown in FIG. 2 . If the base station does not receive ACK/NACK or receives NACK, it is considered that the user equipment has missed the downlink control information, and multiple time-frequency domain resources will be configured in the CORESET to repeatedly send the downlink control information, as shown in Figure 3.
场景2：在长调度粒度下行数据传输场景下，本方案的具体过程如下：Scenario 2: In the long scheduling granularity downlink data transmission scenario, the specific process of this solution is as follows:
其中，长调度粒度指的是下行控制信息调度的的下行数据占据的OFDM符号个数大于等于3。The long scheduling granularity refers to that the number of OFDM symbols occupied by the downlink data scheduled by the downlink control information is greater than or equal to 3.
基站向用户设备发送下行控制信息；用户设备接收下行控制信息并对下行控制信息进行解码；如果下行控制信息解码成功，则向基站反馈ACK信号；如果下行控制信息解码失败，则向基站反馈NACK信号；如果基站第一次接收到ACK信号，则认为用户设备对下行控制信息解码成功，将按照先前配置对下行控制信息和数据进行发送；用户设备接收基站发送的数据并对接收的数据进行解码，如果数据解码成功，则向基站反馈ACK信号；如果数据解码失败，则向基站反馈NACK信号；如果基站第二次接收到ACK，则认为UE对数据解码成功，从而终止数据发送。如果基站没有接收到ACK/NACK或者收到NACK，则认为用户设备漏检了下行控制信息，基站将在CORESET内部配置多个时频域资源重复发送下行控制信息，如图4所示。The base station sends downlink control information to the user equipment; the user equipment receives the downlink control information and decodes the downlink control information; if the downlink control information is decoded successfully, it feeds back an ACK signal to the base station; if the downlink control information fails to be decoded, it feeds back a NACK signal to the base station ; If the base station receives the ACK signal for the first time, it is considered that the user equipment has successfully decoded the downlink control information, and will send the downlink control information and data according to the previous configuration; the user equipment receives the data sent by the base station and decodes the received data, If the data decoding is successful, the ACK signal is fed back to the base station; if the data decoding fails, the NACK signal is fed back to the base station; if the base station receives the ACK for the second time, it is considered that the UE decodes the data successfully, thereby terminating the data transmission. If the base station does not receive ACK/NACK or receives NACK, it is considered that the user equipment has missed the downlink control information, and the base station will configure multiple time-frequency domain resources in the CORESET to repeatedly send the downlink control information, as shown in Figure 4.
场景3：在长调度时延上行数据传输场景下，本方案的具体过程如下：Scenario 3: In the scenario of long scheduling delay uplink data transmission, the specific process of this solution is as follows:
其中，长调度时延指的是从基站发送下行控制信息到用户设备发送相应数据时的时间差大于等于3个OFDM符号。The long scheduling delay refers to the time difference between when the base station sends the downlink control information to when the user equipment sends the corresponding data, which is greater than or equal to 3 OFDM symbols.
基站向用户设备发送下行控制信息；用户设备接收下行控制信息并对下行控制信息进行解码；如果下行控制信息解码成功，则向基站反馈ACK信号；如果下行控制信息解码失败，则向基站反馈NACK信号；如果基站接收到ACK信号，则认为用户设备对下行控制信息解码成功，基站将不再传输下行控制信息；如果基站并没有接收到ACK/NACK或者收到NACK，则认为用户设备漏检了下行控制信息，基站将重复发送下行控制信息。如图5所示，基站发送下行控制信息时到用户设备发送相应数据时的时间差为4个OFDM符号，用户设备对第一个下行控制信息解码失败，并迅速向基站反馈NACK信号；基站接收到NACK信号，并在接收到NACK信号时的下一个OFDM符号即第4个OFDM符号开始，在CORESET控制资源集内部配置多个时频域资源重复发送下行控制信息；用户设备再次接收基站发送的下行控制信息并对下行控制信息解码；这次用户设备对下行控制信息解码成功，向基站反馈ACK信号；基站接收到ACK号，并终止对下行控制信息的重复发送；然后，用户设备在下行控制信息指示的时频域资源上向基站发送数据。The base station sends downlink control information to the user equipment; the user equipment receives the downlink control information and decodes the downlink control information; if the downlink control information is decoded successfully, it feeds back an ACK signal to the base station; if the downlink control information fails to be decoded, it feeds back a NACK signal to the base station ; If the base station receives the ACK signal, it is considered that the user equipment has successfully decoded the downlink control information, and the base station will no longer transmit the downlink control information; if the base station does not receive ACK/NACK or NACK, it is considered that the user equipment has missed the downlink detection. control information, the base station will repeatedly send downlink control information. As shown in Figure 5, the time difference between when the base station sends the downlink control information and when the user equipment sends the corresponding data is 4 OFDM symbols. The user equipment fails to decode the first downlink control information and quickly feeds back a NACK signal to the base station; the base station receives NACK signal, and starting from the next OFDM symbol when the NACK signal is received, that is, the fourth OFDM symbol, multiple time-frequency domain resources are configured in the CORESET control resource set to repeatedly send downlink control information; the user equipment receives the downlink control information sent by the base station again. Control information and decode the downlink control information; this time, the user equipment successfully decodes the downlink control information and feeds back an ACK signal to the base station; the base station receives the ACK number and terminates the repeated transmission of the downlink control information; then, the user equipment in the downlink control information Data is sent to the base station on the indicated time-frequency domain resources.
基于相同的技术构思，如图6所示，本发明实施例还提供了一种超高可靠超低时通信中下行控制信息传输的装置，装置应用于用户设备，装置包括：Based on the same technical concept, as shown in FIG. 6 , an embodiment of the present invention also provides a device for transmitting downlink control information in ultra-reliable and ultra-low time communication. The device is applied to user equipment, and the device includes:
第一收发模块601，用于接收基站发送的下行控制信息；The
第一处理模块602，用于对所述下行控制信息进行解码；a
所述第一收发模块，还用于将所述下行控制信息的解码结果反馈给基站。The first transceiver module is further configured to feed back the decoding result of the downlink control information to the base station.
可选的，第一收发模块，还用于：Optionally, the first transceiver module is further used for:
如果所述下行控制信息解码正确，则在所述下行控制信息指示的时频域资源上向所述基站发送数据或接收所述基站发送的数据。If the downlink control information is decoded correctly, send data to the base station or receive data sent by the base station on the time-frequency domain resource indicated by the downlink control information.
基于相同的技术构思，如图7所示，本发明实施例还提供了一种超高可靠超低时通信中下行控制信息传输的装置，装置应用于基站，装置包括：Based on the same technical concept, as shown in FIG. 7 , an embodiment of the present invention also provides a device for transmitting downlink control information in ultra-reliable and ultra-low time communication. The device is applied to a base station, and the device includes:
第二收发模块701，用于向用户设备发送下行控制信息；A
第二处理模块702，用于如果接收到所述用户设备发送的表示所述下行控制信息解码正确的解码结果，则判定所述下行控制信息传输成功；否则，触发所述第二收发模块按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息。The
可选的，第二处理模块，具体用于：Optionally, the second processing module is specifically used for:
触发所述第二收发模块在控制资源集CORESET内部配置的预设数目个时频域资源上，分别发送所述下行控制信息。Trigger the second transceiver module to send the downlink control information respectively on a preset number of time-frequency domain resources configured in the control resource set CORESET.
可选的，所述装置还包括：Optionally, the device further includes:
数据收发模块，如果所述下行控制信息传输成功，则在所述下行控制信息指示的时频域资源上向所述用户设备发送数据或接收所述用户设备发送的数据。A data transceiver module, if the downlink control information is successfully transmitted, send data to the user equipment or receive data sent by the user equipment on the time-frequency domain resources indicated by the downlink control information.
本发明实施例还提供了一种终端，如图8所示，包括处理器901、通信接口802、存储器803和通信总线804，其中，处理器801，通信接口802，存储器803通过通信总线804完成相互间的通信；An embodiment of the present invention also provides a terminal, as shown in FIG. 8 , including a
存储器803，用于存放计算机程序；a
处理器801，用于执行存储器803上所存放的程序时，以使该终端执行如下步骤，该步骤包括：The
接收基站发送的下行控制信息；Receive downlink control information sent by the base station;
对所述下行控制信息进行解码，并将所述下行控制信息的解码结果反馈给基站。The downlink control information is decoded, and the decoding result of the downlink control information is fed back to the base station.
可选的，所述将所述下行控制信息的解码结果反馈给基站之后，还包括：Optionally, after feeding back the decoding result of the downlink control information to the base station, the method further includes:
如果所述下行控制信息解码正确，则在所述下行控制信息指示的时频域资源上向所述基站发送数据或接收所述基站发送的数据。If the downlink control information is decoded correctly, send data to the base station or receive data sent by the base station on the time-frequency domain resource indicated by the downlink control information.
本发明实施例还提供了一种服务器，如图9所示，包括处理器901、通信接口902、存储器903和通信总线904，其中，处理器901，通信接口902，存储器903通过通信总线904完成相互间的通信；An embodiment of the present invention further provides a server, as shown in FIG. 9 , including a
存储器903，用于存放计算机程序；a
处理器901，用于执行存储器903上所存放的程序时，以使该服务器执行如下步骤，该步骤包括：The
向用户设备发送下行控制信息；Send downlink control information to the user equipment;
如果接收到所述用户设备发送的表示所述下行控制信息解码正确的解码结果，则判定所述下行控制信息传输成功；否则，按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息。If a decoding result indicating that the downlink control information is correctly decoded and sent by the user equipment is received, it is determined that the transmission of the downlink control information is successful; otherwise, according to the preset downlink control information retransmission policy, the downlink control information is sent to the user equipment again. Downlink control information.
可选的，所述按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息，包括：Optionally, sending downlink control information to the user equipment again according to a preset downlink control information retransmission policy includes:
在控制资源集CORESET内部配置的预设数目个时频域资源上，分别发送下行控制信息。Downlink control information is respectively sent on a preset number of time-frequency domain resources configured in the control resource set CORESET.
可选的，所述按照预设下行控制信息重传策略，再次向所述用户设备发送下行控制信息之后，还包括：Optionally, after the downlink control information is sent to the user equipment again according to the preset downlink control information retransmission policy, the method further includes:
如果所述下行控制信息传输成功，则在所述下行控制信息指示的时频域资源上向所述用户设备发送数据或接收所述用户设备发送的数据。If the transmission of the downlink control information is successful, send data to the user equipment or receive data sent by the user equipment on the time-frequency domain resources indicated by the downlink control information.
机器可读存储介质可以包括RAM(Random Access Memory，随机存取存储器)，也可以包括NVM(Non-Volatile Memory，非易失性存储器)，例如至少一个磁盘存储器。另外，机器可读存储介质还可以是至少一个位于远离前述处理器的存储装置。The machine-readable storage medium may include RAM (Random Access Memory, random access memory), and may also include NVM (Non-Volatile Memory, non-volatile memory), such as at least one disk storage. Additionally, the machine-readable storage medium can also be at least one storage device located remotely from the aforementioned processor.
上述处理器可以是通用处理器，包括CPU(Central Processing Unit，中央处理器)、NP(Network Processor，网络处理器)等；还可以是DSP(Digital Signal Processing，数字信号处理器)、ASIC(Application Specific Integrated Circuit，专用集成电路)、FPGA(Field-Programmable Gate Array，现场可编程门阵列)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。The above-mentioned processor may be a general-purpose processor, including a CPU (Central Processing Unit, central processing unit), an NP (Network Processor, network processor), etc.; it may also be a DSP (Digital Signal Processing, digital signal processor), an ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array, Field Programmable Gate Array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
本发明实施例提供的一种超高可靠超低时通信中下行控制信息传输的方法，可以在用户设备接收到下行控制信息后立即对下行控制信息进行解码，并将解码结果反馈给基站，如果基站没有接收到下行控制信息解码正确的反馈，则在控制资源集CORESET内部配置多个时频域资源以更高聚合等级重复发送下行控制信息，这样降低了发送下行控制信息的码率，使得用户设备更加容易接收到下行控制信息，能有效提高下行控制信息传输的可靠性。A method for downlink control information transmission in ultra-reliable and ultra-low time communication provided by the embodiment of the present invention can decode the downlink control information immediately after the user equipment receives the downlink control information, and feed back the decoding result to the base station. If the base station does not receive feedback that the downlink control information is decoded correctly, it configures multiple time-frequency domain resources in the control resource set CORESET to repeatedly send downlink control information at a higher aggregation level, which reduces the code rate for sending downlink control information and makes the user It is easier for the device to receive downlink control information, which can effectively improve the reliability of downlink control information transmission.
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，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、物品或者设备不仅包括那些要素，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、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。It should be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, 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 list of elements includes not only those elements, but also includes not explicitly listed or other elements 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.
本说明书中的各个实施例均采用相关的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其，对于装置实施例而言，由于其基本相似于方法实施例，所以描述的比较简单，相关之处参见方法实施例的部分说明即可。Each embodiment in this specification is described in a related manner, and the same and similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the apparatus embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for related parts.
以上所述仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等，均包含在本发明的保护范围内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
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