CN110012543B - Data transmission method, system and storage medium for low control overhead in Internet of things - Google Patents
Data transmission method, system and storage medium for low control overhead in Internet of thingsDownload PDFInfo
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- CN110012543B CN110012543BCN201910249503.5ACN201910249503ACN110012543BCN 110012543 BCN110012543 BCN 110012543BCN 201910249503 ACN201910249503 ACN 201910249503ACN 110012543 BCN110012543 BCN 110012543B
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及无线通信技术领域，尤其涉及一种物联网中低控制开销的数据传输方法、系统及存储介质。The invention relates to the technical field of wireless communication, in particular to a data transmission method, system and storage medium with low control overhead in the Internet of Things.
背景技术Background technique
5G将满足人们在居住、工作、休闲和交通等各种区域的多样化业务需求，即便在密集住宅区、办公室、体育场、露天集会、地铁、快速路、高铁和广域覆盖等具有超高流量密度、超高连接数密度、超高移动性特征的场景，也可以为用户提供超高清视频、虚拟现实、增强现实、云桌面、在线游戏等极致业务体验。与此同时，5G还将渗透到物联网及各种行业领域，与工业设施、医疗仪器、交通工具等深度融合，有效满足工业、医疗、交通等垂直行业的多样化业务需求，实现真正的“万物互联”。5G will meet the diverse business needs of people in various areas such as living, working, leisure, and transportation, even in dense residential areas, offices, stadiums, open-air gatherings, subways, expressways, high-speed rails, and wide-area coverage. It can also provide users with extreme business experiences such as ultra-high-definition video, virtual reality, augmented reality, cloud desktop, and online games. At the same time, 5G will penetrate into the Internet of Things and various industries, and will be deeply integrated with industrial facilities, medical equipment, transportation, etc., to effectively meet the diversified business needs of vertical industries such as industry, medical care, and transportation, and realize the real " Internet of Everything".
5G应用场景可以分为两大类，即移动宽带(MBB,Mobile Broadband)和物联网(IoT，Internet of Things)。其中，移动宽带接入的主要技术需求是高容量，提供高数据速率，以满足数据业务需求的不断增长。物联网主要是受机器通信(MTC,Machine TypeCommunication)需求的驱动，可以进一步分为两种类型，包括低速率的海量机器通信(MMC,Massive Machine Communication)和低时延高可靠的机器通信。其中，对于低速率的海量机器通信，海量节点低速率接入，传输的数据包通常较小，间隔时间会相对较长，这类节点的成本和功耗通常也会很低；对于低时延高可靠的机器通信，主要面向实时性和可靠性要求比较高的机器通信，例如实时警报、实时监控等。5G application scenarios can be divided into two categories, namely Mobile Broadband (MBB, Mobile Broadband) and Internet of Things (IoT, Internet of Things). Among them, the main technical requirement for mobile broadband access is high capacity and high data rate to meet the growing demand for data services. The Internet of Things is mainly driven by the needs of machine communication (MTC, Machine Type Communication), which can be further divided into two types, including low-speed massive machine communication (MMC, Massive Machine Communication) and low-latency and high-reliability machine communication. Among them, for low-rate massive machine communication, when massive nodes are connected at a low rate, the transmitted data packets are usually small and the interval time is relatively long, and the cost and power consumption of such nodes are usually very low; for low-latency Highly reliable machine communication, mainly for machine communication with high real-time and reliability requirements, such as real-time alarm, real-time monitoring, etc.
第五代移动通信系统中,一种需要研究的场景是快速、较低的控制开销的数据传输方法,常用的解决方案主要问题是控制开销非常大,传输时延比较长,这就导致系统的频谱效率比较低,如何增加物联网系统的频谱效率,是物联网系统亟待解决的重要问题。In the fifth-generation mobile communication system, a scenario that needs to be studied is a data transmission method with fast and low control overhead. The main problem of the commonly used solutions is that the control overhead is very large and the transmission delay is relatively long, which leads to system failure. The spectral efficiency is relatively low, how to increase the spectral efficiency of the Internet of Things system is an important problem to be solved urgently in the Internet of Things system.
发明内容Contents of the invention
本发明提供了一种物联网中低控制开销的数据传输方法，包括依次执行如下步骤：The present invention provides a data transmission method with low control overhead in the Internet of Things, comprising performing the following steps in sequence:
步骤1：第二通信节点接收第一通信节点发送的第一配置信息，并将所述第一配置信息存储到存储器中，所述第一配置信息包括N个接入序列组配置信息、N个数据资源配置信息，所述N为大于等于1的整数；Step 1: The second communication node receives the first configuration information sent by the first communication node, and stores the first configuration information in a memory, and the first configuration information includes N access sequence group configuration information, N access sequence group configuration information, and N access sequence group configuration information. Data resource configuration information, the N is an integer greater than or equal to 1;
所述第二通信节点获取需要给所述第一通信节点发送的信源数据业务比特序列，根据所述信源数据业务比特序列的前LOG2(N)个比特确定所述第一配置信息确定需要使用的候选接入序列组；The second communication node obtains the source data service bit sequence that needs to be sent to the first communication node, and determines the first configuration information according to the first LOG2(N) bits of the source data service bit sequence. the set of candidate access sequences used;
所述第二通信节点对所述信源数据业务比特序列进行信道编码得到信道数据业务比特序列，所述第二通信节点根据所述信道数据业务比特序列的前LOG2(N)个比特确定候选数据资源；The second communication node performs channel coding on the source data service bit sequence to obtain a channel data service bit sequence, and the second communication node determines candidate data according to the first LOG2(N) bits of the channel data service bit sequence resource;
步骤4：所述第二通信节点随机从所述候选接入序列组中选择一条候选接入序列，所述第二通信节点发送所述候选接入序列，使用所述候选数据资源传输所述信道数据业务比特序列给所述第一通信节点。Step 4: The second communication node randomly selects a candidate access sequence from the candidate access sequence group, the second communication node sends the candidate access sequence, and uses the candidate data resource to transmit the channel A data service bit sequence is sent to the first communication node.
作为本发明的进一步改进，所述候选数据资源包含的子载波个数为3*512个，所述候选数据资源包含的子载波中1/3的子载波用来传输解调参考信号，传输所述解调参考信号的所述子载波均匀分布在所述候选数据资源包含的3*512个子载波中。As a further improvement of the present invention, the number of subcarriers included in the candidate data resources is 3*512, and 1/3 of the subcarriers included in the candidate data resources are used to transmit demodulation reference signals, and transmit the The subcarriers of the demodulation reference signal are evenly distributed among the 3*512 subcarriers included in the candidate data resources.
作为本发明的进一步改进，对所述信源数据业务比特序列进行信道编码时采用的码率小于等于1/2。As a further improvement of the present invention, the code rate used for channel coding the source data service bit sequence is less than or equal to 1/2.
作为本发明的进一步改进，如果所述信道数据业务比特序列的长度小于等于64，则所述第二通信节点在时间上使用先于所述候选数据资源的时频资源发送1条所述候选接入序列。As a further improvement of the present invention, if the length of the channel data service bit sequence is less than or equal to 64, the second communication node uses the time-frequency resource earlier than the candidate data resource to send one of the candidate access points in time. into the sequence.
作为本发明的进一步改进，如果所述信道数据业务比特序列的长度大于64、且小于等于128，则所述第二通信节点在时间上使用先于所述候选数据资源的时频资源重复发送2条所述候选接入序列。As a further improvement of the present invention, if the length of the channel data service bit sequence is greater than 64 and less than or equal to 128, the second communication node uses the time-frequency resource prior to the candidate data resource to repeatedly send 2 The candidate access sequence described in the article.
作为本发明的进一步改进，如果所述信道数据业务比特序列的长度大于等于128，则所述第二通信节点在时间上使用位于所述候选数据资源两侧的时频资源各重复发送2条所述候选接入序列。As a further improvement of the present invention, if the length of the channel data service bit sequence is greater than or equal to 128, the second communication node uses time-frequency resources located on both sides of the candidate data resource to repeatedly send two The above candidate access sequence.
作为本发明的进一步改进，所述第二通信节点发送所述候选接入序列时在每个子载波上的发送功率比发送所述信道数据业务比特序列在每个子载波上的发送功率高6dB。As a further improvement of the present invention, when the second communication node sends the candidate access sequence, the transmission power on each subcarrier is 6dB higher than the transmission power on each subcarrier when sending the channel data service bit sequence.
作为本发明的进一步改进，如果所述第二通信节点在发送完所述信道数据业务比特序列的10ms内，没有收到所述第一通信节点的接收成功反馈信息，则所述第二通信节点使用所述信道数据业务比特序列的前2*LOG2(N)个比特确定两个候选数据资源，所述第二通信节点使用所述两个候选数据资源重传所述信道数据业务比特序列。As a further improvement of the present invention, if the second communication node does not receive the reception success feedback information from the first communication node within 10 ms after sending the channel data service bit sequence, the second communication node Using the first 2*LOG2(N) bits of the channel data service bit sequence to determine two candidate data resources, the second communication node uses the two candidate data resources to retransmit the channel data service bit sequence.
本发明还提供了一种物联网中低控制开销的数据传输系统，包括：存储器、处理器以及存储在所述存储器上的计算机程序，所述计算机程序配置为由所述处理器调用时实现本发明所述的方法的步骤。The present invention also provides a data transmission system with low control overhead in the Internet of Things, including: a memory, a processor, and a computer program stored on the memory, and the computer program is configured to implement the present invention when called by the processor. The steps of the method described in the invention.
本发明还提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序配置为由处理器调用时实现本发明所述的方法的步骤。The present invention also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and the computer program is configured to realize the steps of the method described in the present invention when invoked by a processor.
本发明的有益效果是：本发明与现有技术相比,克服现有物联网中频谱效率差的问题,提高了物联网系统的频谱效率,降低了控制开销。The beneficial effects of the present invention are: compared with the prior art, the present invention overcomes the problem of poor spectral efficiency in the existing Internet of Things, improves the spectral efficiency of the Internet of Things system, and reduces control overhead.
附图说明Description of drawings
图1是本发明的方法流程图。Fig. 1 is a flow chart of the method of the present invention.
具体实施方式detailed description
如图1所示，本发明公开了一种物联网中低控制开销的数据传输方法，作为本发明的实施例1，该数据传输方法包括依次执行如下步骤：As shown in Figure 1, the present invention discloses a data transmission method with low control overhead in the Internet of Things. As Embodiment 1 of the present invention, the data transmission method includes performing the following steps in sequence:
步骤S1：第二通信节点接收第一通信节点发送的第一配置信息，并将所述第一配置信息存储到存储器中，所述第一配置信息包括N个接入序列组配置信息、N个数据资源配置信息，所述N为大于等于1的整数；Step S1: The second communication node receives the first configuration information sent by the first communication node, and stores the first configuration information in the memory, the first configuration information includes N access sequence group configuration information, N Data resource configuration information, the N is an integer greater than or equal to 1;
步骤S2：所述第二通信节点获取需要给所述第一通信节点发送的信源数据业务比特序列，根据所述信源数据业务比特序列的前LOG2(N)个比特确定所述第一配置信息确定需要使用的候选接入序列组；Step S2: The second communication node obtains the source data service bit sequence to be sent to the first communication node, and determines the first configuration according to the first LOG2(N) bits of the source data service bit sequence The information determines the set of candidate access sequences that need to be used;
步骤S3：所述第二通信节点对所述信源数据业务比特序列进行信道编码得到信道数据业务比特序列，所述第二通信节点根据所述信道数据业务比特序列的前LOG2(N)个比特确定候选数据资源；Step S3: The second communication node performs channel coding on the source data service bit sequence to obtain a channel data service bit sequence, and the second communication node according to the first LOG2(N) bits of the channel data service bit sequence Identify candidate data sources;
步骤S4：所述第二通信节点随机从所述候选接入序列组中选择一条候选接入序列，所述第二通信节点发送所述候选接入序列，使用所述候选数据资源传输所述信道数据业务比特序列给所述第一通信节点。Step S4: The second communication node randomly selects a candidate access sequence from the candidate access sequence group, the second communication node sends the candidate access sequence, and uses the candidate data resource to transmit the channel A data service bit sequence is sent to the first communication node.
所述第一通信节点为基站，所述第二通信节点为终端。The first communication node is a base station, and the second communication node is a terminal.
实施例2：在实施例1的基础上，候选数据资源包含的子载波个数为3*512个，这个取值是基于物理网数据包的特点进行分析后确定的，可以适用于90％以上的物联网数据结构。Embodiment 2: On the basis of Embodiment 1, the number of subcarriers contained in the candidate data resources is 3*512. This value is determined after analyzing the characteristics of the data packets on the physical network, and can be applied to more than 90% IoT data structure.
实施例3：在实施例2的基础上，所述候选数据资源包含的子载波中1/3的子载波用来传输解调参考信号。通常，基站可以使用终端发送的接入序列进行信道估计，从而去解调终端发送的上行数据，这里增加解调导频的好处是提高需要重点保护的特定长度业务数据的信道估计精度，从而提升该类长度业务数据的传输成功率。Embodiment 3: On the basis of Embodiment 2, 1/3 of the subcarriers included in the candidate data resources are used to transmit demodulation reference signals. Usually, the base station can use the access sequence sent by the terminal to perform channel estimation to demodulate the uplink data sent by the terminal. The advantage of adding demodulation pilots here is to improve the channel estimation accuracy of service data of a specific length that needs to be protected, thereby improving The transmission success rate of service data of this length.
实施例4：在实施例3的基础上，传输解调参考信号的子载波均匀分布在候选数据资源包含的3*512个子载波中。这样做的好处是可以让基站相对准确地获得终端发送数据所使用资源的信道信息，提高数据接收功率的概率。Embodiment 4: On the basis of Embodiment 3, the subcarriers for transmitting demodulation reference signals are evenly distributed among the 3*512 subcarriers included in the candidate data resources. The advantage of doing this is that the base station can relatively accurately obtain the channel information of the resource used by the terminal to send data, and improve the probability of receiving data power.
实施例5：在实施例1的基础上，对信源数据业务比特序列进行信道编码时采用的码率小于等于1/2。这样要求的目的是通过极低的码率，确保即使终端之间在发生数据传输碰撞的情况下，基站也能成功解码终端发送的上行数据。Embodiment 5: On the basis of Embodiment 1, the code rate used when performing channel coding on the information source data service bit sequence is less than or equal to 1/2. The purpose of this requirement is to ensure that the base station can successfully decode the uplink data sent by the terminal even if data transmission collision occurs between the terminals through an extremely low code rate.
实施例6：在实施例1的基础上，如果所述信道数据业务比特序列的长度小于等于64，则所述第二通信节点在时间上使用先于所述候选数据资源的时频资源发送1条所述候选接入序列。这样做的目的是由于终端的信源比特长度比较小时，即使接入序列由于发送能量低导致基站未能成功接收接入序列，进而基站无法去解码相关数据的情况下，对系统的频谱效率影响较小。Embodiment 6: On the basis of Embodiment 1, if the length of the channel data service bit sequence is less than or equal to 64, the second communication node uses the time-frequency resource prior to the candidate data resource to send 1 The candidate access sequence described in the article. The purpose of this is that since the source bit length of the terminal is relatively small, even if the access sequence fails to receive the access sequence due to low transmission energy, and the base station cannot decode the relevant data, the spectral efficiency of the system will be affected. smaller.
实施例7：在实施例1的基础上，如果所述信道数据业务比特序列的长度大于64、且小于等于128，则所述第二通信节点在时间上使用先于所述候选数据资源的时频资源重复发送2条所述候选接入序列。这样做的目的是由于终端的信源比特长度适中时，尽可能通过重复发送接入序列的方式增加基站接收接入序列的能量，成功接收接入序列的概率，进而增加基站成功接收数据的概率。Embodiment 7: On the basis of Embodiment 1, if the length of the channel data service bit sequence is greater than 64 and less than or equal to 128, then the second communication node uses a time that is earlier than the candidate data resource in time. Repeatedly sending the two candidate access sequences using frequency resources. The purpose of this is that when the source bit length of the terminal is moderate, the energy of the base station receiving the access sequence is increased as much as possible by repeatedly sending the access sequence, the probability of successfully receiving the access sequence, and thus increasing the probability of the base station successfully receiving data .
实施例8：在实施例1的基础上，如果所述信道数据业务比特序列的长度大于等于128，则所述第二通信节点在时间上使用位于所述候选数据资源两侧的时频资源各重复发送2条所述候选接入序列。这样做的目的是由于终端的信源比特长度适中时，尽可能通过重复发送接入序列的方式增加基站接收接入序列的能量，成功接收接入序列的概率，进而增加基站成功接收数据的概率。Embodiment 8: On the basis of Embodiment 1, if the length of the channel data service bit sequence is greater than or equal to 128, the second communication node uses time-frequency resources located on both sides of the candidate data resource in time. Repeatedly sending the two candidate access sequences. The purpose of this is that when the source bit length of the terminal is moderate, the energy of the base station receiving the access sequence is increased as much as possible by repeatedly sending the access sequence, the probability of successfully receiving the access sequence, and thus increasing the probability of the base station successfully receiving data .
实施例9：在实施例1的基础上，所述第二通信节点发送所述候选接入序列时在每个子载波上的发送功率比发送所述信道数据业务比特序列在每个子载波上的发送功率高6dB。这样做的原因是数据业务比特有编码增益，而接入序列没有任何编码增益，而且接入序列对数据业务的接收成功与否具有决定性的影响，所以通过增加接入序列发送功率的方式来提高基站接收上行数据业务的成功率。Embodiment 9: On the basis of Embodiment 1, the transmission power of the second communication node on each subcarrier when sending the candidate access sequence is higher than the transmission power of the channel data service bit sequence on each subcarrier 6dB higher power. The reason for this is that the data service bits have coding gain, but the access sequence does not have any coding gain, and the access sequence has a decisive impact on the success of the data service reception, so the transmission power of the access sequence is increased to improve The success rate of the base station receiving uplink data services.
实施例10：在实施例1的基础上，如果所述第二通信节点在发送完所述信道数据业务比特序列的10ms内，没有收到所述第一通信节点的接收成功反馈信息，则所述第二通信节点使用所述信道数据业务比特序列的前2*LOG2(N)个比特确定两个候选数据资源，所述第二通信节点使用所述两个候选数据资源重传所述信道数据业务比特序列。这样做的好处是通过尽可能增加传输资源来获取频率分集增益，从而增加数据接收成功的概率。Embodiment 10: On the basis of Embodiment 1, if the second communication node does not receive the reception success feedback information from the first communication node within 10 ms after sending the channel data service bit sequence, then the The second communication node uses the first 2*LOG2(N) bits of the channel data service bit sequence to determine two candidate data resources, and the second communication node uses the two candidate data resources to retransmit the channel data business bit sequence. The advantage of doing this is to obtain frequency diversity gain by increasing transmission resources as much as possible, thereby increasing the probability of successful data reception.
本发明还公开了一种物联网中低控制开销的数据传输系统，包括：存储器、处理器以及存储在所述存储器上的计算机程序，所述计算机程序配置为由所述处理器调用时实现本发明所述的方法的步骤。The invention also discloses a data transmission system with low control overhead in the Internet of Things, including: a memory, a processor, and a computer program stored on the memory, and the computer program is configured to realize the present invention when called by the processor. The steps of the method described in the invention.
本发明还公开了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序配置为由处理器调用时实现本发明所述的方法的步骤。The present invention also discloses a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program is configured to realize the steps of the method described in the present invention when invoked by a processor.
本发明的有益效果是：本发明与现有技术相比,克服现有物联网中频谱效率差的问题,提高了物联网系统的频谱效率,降低了控制开销。The beneficial effects of the present invention are: compared with the prior art, the present invention overcomes the problem of poor spectral efficiency in the existing Internet of Things, improves the spectral efficiency of the Internet of Things system, and reduces control overhead.
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.
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