CN111737004B - Remote sensing satellite data transmission resource scheduling method and device based on two-way degrees of freedom - Google Patents
Remote sensing satellite data transmission resource scheduling method and device based on two-way degrees of freedom Download PDFInfo
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Abstract
本发明提供了一种基于双向自由度的遥感卫星数传资源调度方法及装置。该方法包括：确定遥感卫星观测时间区间，计算各数传资源对遥感卫星的接收时段；基于卫星测站预报，计算每个观测任务对应的接收自由度；选择接收自由度最小的观测任务进行分析，计算具备接收该观测任务的各数传资源的服务自由度；将服务自由度最小的数传资源分配给选定的观测任务；删除已经分配数传资源的观测任务，并且删除已经分配的数传资源；重复上述过程，直至所有观测任务均分配有数传资源。本发明提供的基于双向自由度的卫星数传资源调度方法及装置针对不同遥感卫星对数传资源使用冲突消解，具有判断逻辑简单、时间复杂度低的特点。
The invention provides a remote sensing satellite data transmission resource scheduling method and device based on two-way degrees of freedom. The method includes: determining the remote sensing satellite observation time interval, calculating the reception period of each data transmission resource for the remote sensing satellite; based on the satellite station forecast, calculating the reception degree of freedom corresponding to each observation task; selecting the observation task with the smallest reception degree of freedom for analysis , calculate the service degree of freedom of each data transmission resource capable of receiving the observation task; allocate the data transmission resource with the smallest service degree of freedom to the selected observation task; delete the observation task that has been allocated data transmission resources, and delete the allocated data transmission resources; repeat the above process until all observation tasks are allocated data transmission resources. The satellite data transmission resource scheduling method and device based on two-way degrees of freedom provided by the present invention resolve conflicts in the use of data transmission resources by different remote sensing satellites, and have the characteristics of simple judgment logic and low time complexity.
Description
技术领域Technical field
本发明涉及遥感卫星数传资源预分配技术领域，特别是涉及一种基于双向自由度的遥感卫星数传资源调度方法及装置。The invention relates to the technical field of remote sensing satellite data transmission resource pre-allocation, and in particular to a remote sensing satellite data transmission resource scheduling method and device based on two-way degrees of freedom.
背景技术Background technique
遥感卫星依靠数传资源实现遥感数据对地回传。遥感卫星可综合调度使用多个数传资源进行遥感数据回传，数传资源可分时接收不同遥感卫星回传的遥感数据。但是，一个数传资源同一时刻只能为一颗遥感卫星提供数据回传服务。如何自动进行数传资源冲突消解、将多个数传资源科学高效给多颗遥感卫星，是遥感卫星任务管控和资源调度的核心业务和难点所在。Remote sensing satellites rely on digital transmission resources to transmit remote sensing data back to the earth. Remote sensing satellites can be comprehensively scheduled to use multiple data transmission resources to transmit remote sensing data back. The data transmission resources can receive remote sensing data returned by different remote sensing satellites in a time-sharing manner. However, one data transmission resource can only provide data return services for one remote sensing satellite at a time. How to automatically resolve data transmission resource conflicts and provide multiple data transmission resources to multiple remote sensing satellites scientifically and efficiently is the core business and difficulty of remote sensing satellite mission control and resource scheduling.
遥感卫星数传资源调度的目的是合理筹划分配有限数传资源，最大限度满足遥感卫星数据回传需求，核心在于不同遥感卫星对数传资源使用冲突消解，当前没有相关研究成果可支撑此项工作。The purpose of remote sensing satellite data transmission resource scheduling is to rationally plan and allocate limited data transmission resources to meet the remote sensing satellite data return needs to the maximum extent. The core lies in the resolution of conflicts in the use of data transmission resources by different remote sensing satellites. Currently, there are no relevant research results to support this work. .
发明内容Contents of the invention
本发明要解决的技术问题是提供一种基于双向自由度的遥感卫星数传资源调度方法及装置，针对不同遥感卫星对数传资源使用冲突进行消解，具有判断逻辑简单、时间复杂度低的特点。The technical problem to be solved by the present invention is to provide a remote sensing satellite data transmission resource scheduling method and device based on two-way degrees of freedom, which resolves conflicts in the use of data transmission resources by different remote sensing satellites and has the characteristics of simple judgment logic and low time complexity. .
为解决上述技术问题，本发明提供了一种基于双向自由度的遥感卫星数传资源调度方法，所述方法包括：确定遥感卫星观测时间区间，计算各数传资源对遥感卫星的接收时段；基于卫星测站预报，计算每个观测任务对应的接收自由度；选择接收自由度最小的观测任务进行分析，计算具备接收该观测任务的各数传资源的服务自由度；将服务自由度最小的数传资源分配给选定的观测任务；删除已经分配数传资源的观测任务，并且删除已经分配的数传资源；重复上述过程，直至所有观测任务均分配有数传资源。In order to solve the above technical problems, the present invention provides a remote sensing satellite data transmission resource scheduling method based on two-way degrees of freedom. The method includes: determining the remote sensing satellite observation time interval, calculating the reception period of each data transmission resource to the remote sensing satellite; based on For satellite station forecasting, calculate the receiving degree of freedom corresponding to each observation task; select the observation task with the smallest receiving degree of freedom for analysis, and calculate the service degree of freedom of each data transmission resource capable of receiving the observation task; combine the data with the smallest service degree of freedom Allocate transmission resources to the selected observation tasks; delete the observation tasks to which data transmission resources have been allocated, and delete the allocated data transmission resources; repeat the above process until all observation tasks are allocated data transmission resources.
在一些实施方式中，还包括：在计算每个观测任务对应的接收自由度之后，选择接收自由度最小的观测任务进行分析，计算具备接收该观测任务的各数传资源的服务自由度之前，删除自由度计算结果为0的观测任务。In some embodiments, the method further includes: after calculating the receiving degree of freedom corresponding to each observation task, selecting the observation task with the smallest receiving degree of freedom for analysis, and before calculating the service degree of freedom of each data transmission resource capable of receiving the observation task, Delete the observation task whose degree of freedom calculation result is 0.
在一些实施方式中，选择接收自由度最小的观测任务进行分析，包括：如果同时有多个自由度同时最小的观测任务，按照优先级由高至低的次序对所述观测任务进行分析。In some implementations, selecting the observation task with the smallest degree of freedom for reception for analysis includes: if there are multiple observation tasks with the smallest degree of freedom at the same time, analyzing the observation tasks in order from high to low priority.
在一些实施方式中，按照优先级由高至低的次序对所述观测任务进行分析，包括：当存在多个观测任务的接收自由度最小时，按照观测任务的优先级进行选择，优先选择优先级高的观测任务进行分析。In some embodiments, analyzing the observation tasks in order from high to low priority includes: when there are multiple observation tasks with the smallest receiving freedom, selecting according to the priority of the observation task, with priority given Advanced observation tasks are analyzed.
在一些实施方式中，将服务自由度最小的数传资源分配给选定的观测任务，包括：如存在多个服务自由度最小的数传资源，选择时效性最高的数传资源进行分配。In some implementations, allocating the data transmission resource with the smallest service degree of freedom to the selected observation task includes: if there are multiple data transmission resources with the smallest service degree of freedom, selecting the most timely data transmission resource for allocation.
在一些实施方式中，重复上述过程，直至所有观测任务均分配有数传资源，包括：重复执行由接收自由度计算至观测任务及数传资源删除的操作，直至所有观测任务均分配有数传资源。In some implementations, repeating the above process until all observation tasks are allocated data transmission resources includes: repeatedly performing operations from receiving degree of freedom calculation to observation tasks and data transmission resource deletion until all observation tasks are allocated data transmission resources.
此外，本发明还提供了一种基于双向自由度的遥感卫星数传资源调度装置，所述装置包括：一个或多个处理器；存储装置，用于存储一个或多个程序；当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现根据前文所述的基于双向自由度的遥感卫星数传资源调度方法。In addition, the present invention also provides a remote sensing satellite data transmission resource scheduling device based on two-way degrees of freedom. The device includes: one or more processors; a storage device for storing one or more programs; when the one Or multiple programs are executed by the one or more processors, so that the one or more processors implement the remote sensing satellite data transmission resource scheduling method based on two-way degrees of freedom as described above.
采用这样的设计后，本发明至少具有以下优点：After adopting such a design, the present invention has at least the following advantages:
将使用范围最为有限的数传资源，分配给数传资源选择范围最小的观测任务，解决了不同遥感卫星对数传资源使用冲突消解的问题，具有判断逻辑简单、时间复杂度低的特点。Allocating the data transmission resources with the most limited range of use to the observation tasks with the smallest selection range of data transmission resources solves the problem of conflict resolution in the use of data transmission resources by different remote sensing satellites, and has the characteristics of simple judgment logic and low time complexity.
附图说明Description of the drawings
上述仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，以下结合附图与具体实施方式对本发明作进一步的详细说明。The above is only an overview of the technical solution of the present invention. In order to have a clearer understanding of the technical means of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
图1是本发明实施例提供的基于双向自由度的数传资源分配方法的流程示意图；Figure 1 is a schematic flow chart of a data transmission resource allocation method based on two-way degrees of freedom provided by an embodiment of the present invention;
图2是本发明实施例提供的双自由度计算的流程示意图；Figure 2 is a schematic flowchart of a two-degree-of-freedom calculation provided by an embodiment of the present invention;
图3是本发明实施例提供的基于双向自由度的数传资源分配装置的结构示意图。Figure 3 is a schematic structural diagram of a data transmission resource allocation device based on two-way degrees of freedom provided by an embodiment of the present invention.
具体实施方式Detailed ways
以下结合附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明。The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
图1是本发明实施例提供的基于双向自由度的数传资源分配方法的流程图。参见图1，基于双向自由度的数传资源分配方法包括以下步骤：Figure 1 is a flow chart of a data transmission resource allocation method based on two-way degrees of freedom provided by an embodiment of the present invention. Referring to Figure 1, the data transmission resource allocation method based on two-way degrees of freedom includes the following steps:
(1)确定遥感卫星观测时间区间，计算各数传资源对遥感卫星的接收时段。(1) Determine the remote sensing satellite observation time interval and calculate the reception period of each data transmission resource for the remote sensing satellite.
(2)基于卫星测站预报，计算每个观测任务对应的接收自由度，删除接收自由度为0的观测任务。(2) Based on the satellite station forecast, calculate the receiving degree of freedom corresponding to each observation task, and delete the observation task with a receiving degree of freedom of 0.
(3)选择接收自由度最小的观测任务进行分析；如存在多个自由度最小的观测任务，选择优先级高的观测任务；计算具备接收此观测任务的各数传资源的服务自由度。(3) Select the observation task with the smallest degree of freedom for receiving for analysis; if there are multiple observation tasks with the smallest degree of freedom, select the observation task with the highest priority; calculate the service degrees of freedom of each data transmission resource capable of receiving this observation task.
(4)将服务自由度最小的数传资源分配给选定的观测任务；如存在多个服务自由度最小的数传资源，选择时效性高的。(4) Allocate the data transmission resource with the smallest service degree of freedom to the selected observation task; if there are multiple data transmission resources with the smallest service degree of freedom, select the one with high timeliness.
(5)删除已分配数传资源的观测任务，删除已分配的数传资源以及与之存在使用冲突的数传资源。(5) Delete the observation tasks that have allocated data transmission resources, delete the allocated data transmission resources and the data transmission resources that conflict with them.
循环步骤(2)、(3)、(4)、(5)，直至完成所有遥感卫星数传资源分配。Repeat steps (2), (3), (4), and (5) until all remote sensing satellite data transmission resources are allocated.
在观测任务众多而数传资源相对有限的背景下，某一观测任务可能同时存在多个满足数传需求的弧段，某一接收弧段也可能满足多个观测任务的数传需求，为此提出基于双向自由度的遥感卫星数传资源分配方法。该方法核心思想为“将使用范围最为有限的数传资源，分配给数传资源选择范围最小的观测任务”。In the context of numerous observation tasks and relatively limited data transmission resources, a certain observation task may have multiple arc segments that meet the data transmission requirements at the same time, and a certain receiving arc segment may also meet the data transmission requirements of multiple observation tasks. For this reason A remote sensing satellite data transmission resource allocation method based on two-way degrees of freedom is proposed. The core idea of this method is to "allocate the data transmission resources with the most limited range of use to the observation tasks with the smallest selection range of data transmission resources."
下面结合图1和图2，对一种基于双向自由度的遥感卫星数传资源调度方法进一步说明，具体如下：The following is a further explanation of a remote sensing satellite data transmission resource scheduling method based on two-way degrees of freedom based on Figure 1 and Figure 2, as follows:
(1)确定遥感卫星观测时间区间，计算各数传资源对遥感卫星的接收时段。(1) Determine the remote sensing satellite observation time interval and calculate the reception period of each data transmission resource for the remote sensing satellite.
设遥感卫星satellitei第j个观测任务scouttaski,j，观测时间区间为[s_sctimei,j,e_sctimei,j]；数传资源resourcek对遥感卫星satellitei的第l个接收时段awi,k,l起止时间表示为[s_awi,k,l,e_awi,k.l]。Assume that the jth observation task scouttask i,j of the remote sensing satellite satellite i , the observation time interval is [s_sctime i,j ,e_sctime i,j ]; the data transmission resource resource k has the lth receiving period aw i of the remote sensing satellite satellite i , The start and end times of k,l are expressed as [s_aw i,k,l ,e_aw i,kl ].
(2)基于卫星测站预报，计算每个观测任务对应的接收自由度，删除接收自由度为0的观测任务。(2) Based on the satellite station forecast, calculate the receiving degree of freedom corresponding to each observation task, and delete the observation task with a receiving degree of freedom of 0.
观测任务接收自由度：满足观测任务数传需要的所有数传资源数量，例如：观测任务scouttaski,j对应满足要求的数传资源数量为Numszyi,j，则观测任务的接收自由度即为Numszyi,j。如图1所示，观测卫星satellite1对应的观测任务1，可用数传资源窗口包括aw1,1,1、aw1,2,1、aw1,3,1，故其接收自由度为3；观测卫星satellite3对应的观测任务1，可用数传资源窗口包括aw3,2,1、aw3,3,1，故其接收自由度为2。The receiving degree of freedom of the observation task: the number of all data transmission resources that meet the data transmission requirements of the observation task. For example: the number of data transmission resources that meet the requirements for the observation task scouttask i,j is Numszy i,j , then the receiving degree of freedom of the observation task is Numszy i,j . As shown in Figure 1, for the observation task 1 corresponding to the observation satellite satellite 1 , the available data transmission resource windows include aw 1,1,1 , aw 1,2,1 , aw 1,3,1 , so its receiving degree of freedom is 3 ; For the observation mission 1 corresponding to the observation satellite satellite 3 , the available data transmission resource windows include aw 3,2,1 and aw 3,3,1 , so its receiving degree of freedom is 2.
(3)选择接收自由度最小的观测任务进行分析；如存在多个自由度最小的观测任务，选择优先级高的观测任务；计算具备接收此观测任务的各数传资源的服务自由度。(3) Select the observation task with the smallest degree of freedom for receiving for analysis; if there are multiple observation tasks with the smallest degree of freedom, select the observation task with the highest priority; calculate the service degrees of freedom of each data transmission resource capable of receiving this observation task.
数传资源服务自由度：为保障观测任务scouttaski,j而导致无法使用的该资源其他接收弧段数量Numrzyi,j,k。如图1所示，如将aw2,1,2分配给satellite2的观测任务2，将导致resource1对应的aw1,1,2和aw3,1,1无法为satellite1观测任务2和satellite3观测任务1提供服务，其服务自由度为2。Degree of freedom of data transmission resource service: the number of other receiving arc segments Numrzy i,j,k of this resource that cannot be used to ensure the observation task scouttask i ,j. As shown in Figure 1, if aw 2,1,2 is assigned to observation task 2 of satellite 2 , it will cause aw 1,1,2 and aw 3,1,1 corresponding to resource 1 to be unable to observe tasks 2 and 2 of satellite 1 . Satellite 3 observation mission 1 provides services, and its service degree of freedom is 2.
(4)将服务自由度最小的数传资源分配给选定的观测任务；如存在多个服务自由度最小的数传资源，选择时效性高的。(4) Allocate the data transmission resource with the smallest service degree of freedom to the selected observation task; if there are multiple data transmission resources with the smallest service degree of freedom, select the one with high timeliness.
如图2所示，如对satellite2的观测任务1分配数传资源，对应resource1和resource1的服务自由度分别为1和2，基于服务自由度最小原则，应该选择resource1的aw2,1,1。As shown in Figure 2, if data transmission resources are allocated to observation task 1 of satellite 2 , the service degrees of freedom corresponding to resource 1 and resource 1 are 1 and 2 respectively. Based on the principle of minimum service degree of freedom, aw 2 of resource 1 should be selected . 1,1 .
(5)删除已分配数传资源的观测任务，删除已分配的数传资源以及与之存在使用冲突的数传资源。(5) Delete the observation tasks that have allocated data transmission resources, delete the allocated data transmission resources and the data transmission resources that conflict with them.
循环步骤(2)、(3)、(4)、(5)，直至完成所有遥感卫星数传资源分配。Repeat steps (2), (3), (4), and (5) until all remote sensing satellite data transmission resources are allocated.
图3示出了基于双向自由度的数传资源分配装置的结构图。参见图3，例如，所述基于双向自由度的数传资源分配装置300可以用于充当遥感卫星控制系统中的资源分配主机。如本文所述，基于双向自由度的数传资源分配装置300可以用于在遥感卫星控制系统中实现对数传资源的分配功能。基于双向自由度的数传资源分配装置300可以在单个节点中实现，或者基于双向自由度的数传资源分配装置300的功能可以在网络中的多个节点中实现。本领域的技术人员应意识到，术语基于双向自由度的数传资源分配装置包括广泛意义上的设备，图3中示出的基于双向自由度的数传资源分配装置300仅是其中一个示例。包括基于双向自由度的数传资源分配装置300是为了表述清楚，并不旨在将本发明的应用限制为特定的基于双向自由度的数传资源分配装置实施例或某一类基于双向自由度的数传资源分配装置实施例。本发明所述的至少部分特征/方法可以在网络装置或组件，例如，基于双向自由度的数传资源分配装置300中实现。例如，本发明中的特征/方法可以采用硬件、固件和/或在硬件上安装运行的软件实现。基于双向自由度的数传资源分配装置300可以是任何通过网络处理，存储和/或转发数据帧的设备，例如，服务器，客户端，数据源等。如图3所示，基于双向自由度的数传资源分配装置300可以包括收发器(Tx/Rx)310，其可以是发射器，接收器，或其组合。Tx/Rx 310可以耦合到多个端口350(例如上行接口和/或下行接口)，用于从其他节点发送和/或接收帧。处理器330可耦合至Tx/Rx 310，以处理帧和/或确定向哪些节点发送帧。处理器330可以包括一个或多个多核处理器和/或存储器设备332，其可以用作数据存储器，缓冲区等。处理器330可以被实现为通用处理器，或者可以是一个或多个专用集成电路(application specific integrated circuit，简称ASIC)和/或数字信号处理器(digital signal processor，简称DSP)的一部分。Figure 3 shows a structural diagram of a data transmission resource allocation device based on two-way degrees of freedom. Referring to Figure 3, for example, the data transmission resource allocation device 300 based on two-way degrees of freedom can be used to serve as a resource allocation host in a remote sensing satellite control system. As described in this article, the data transmission resource allocation device 300 based on two-way degrees of freedom can be used to implement the allocation function of data transmission resources in a remote sensing satellite control system. The data transmission resource allocation device 300 based on bidirectional degrees of freedom can be implemented in a single node, or the functions of the data transmission resource allocation device 300 based on bidirectional degrees of freedom can be implemented in multiple nodes in the network. Those skilled in the art should realize that the term data transmission resource allocation device based on two-way degrees of freedom includes equipment in a broad sense, and the data transmission resource allocation device 300 based on two-way degrees of freedom shown in FIG. 3 is only one example. The inclusion of the data transmission resource allocation device 300 based on the two-way degree of freedom is for the sake of clarity and is not intended to limit the application of the present invention to a specific embodiment of the data transmission resource allocation device based on the two-way degree of freedom or a certain type of data transmission resource allocation device based on the two-way degree of freedom. An embodiment of a data transmission resource allocation device. At least part of the features/methods described in the present invention can be implemented in a network device or component, for example, the data transmission resource allocation device 300 based on two-way degrees of freedom. For example, the features/methods in the present invention may be implemented using hardware, firmware and/or software installed and run on hardware. The data transmission resource allocation device 300 based on two-way degrees of freedom can be any device that processes, stores and/or forwards data frames through the network, for example, a server, a client, a data source, etc. As shown in Figure 3, the data transmission resource allocation device 300 based on bidirectional degrees of freedom may include a transceiver (Tx/Rx) 310, which may be a transmitter, a receiver, or a combination thereof. Tx/Rx 310 may be coupled to multiple ports 350 (eg, upstream interfaces and/or downstream interfaces) for sending and/or receiving frames from other nodes. Processor 330 may be coupled to Tx/Rx 310 to process frames and/or determine which nodes to send frames to. Processor 330 may include one or more multi-core processors and/or memory devices 332, which may serve as data storage, buffers, etc. Processor 330 may be implemented as a general-purpose processor, or may be part of one or more application specific integrated circuits (ASICs) and/or digital signal processors (DSPs).
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，本领域技术人员利用上述揭示的技术内容做出些许简单修改、等同变化或修饰，均落在本发明的保护范围内。The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Those skilled in the art may make some simple modifications, equivalent changes or modifications using the technical contents disclosed above, and they all fall within the scope of this invention. within the scope of protection of the invention.
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