CN116996936A - Aerospace measurement and control network centralized monitoring data packet based on ordered tree and processing method thereof - Google Patents
Aerospace measurement and control network centralized monitoring data packet based on ordered tree and processing method thereof Download PDFInfo
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Abstract
The embodiment of the disclosure relates to a centralized monitoring data packet of an aerospace measurement and control network based on an ordered tree and a processing method thereof. The data packet includes: a packet header and a data field; the packet header comprises a packet identifier, a sub-packet pointer and a data length, and is used for identifying and analyzing the data packet; the data field comprises a parameter field and a data sub-packet, and the parameter field is arranged before the data sub-packet; the packet header is a branch node, the parameter value in the parameter field is a leaf node, the data field consists of the packet header of the data sub-packet and the leaf node, and the packet identifiers in all non-root parent nodes of the branch node form a packet identifier. The method separates data description from analysis codes by designing the data packet and the parameter field based on the ordered tree structure, and uses stable codes to process unstable data packets, thereby realizing unified processing and scalability of the data packets. In addition, the data packets are segmented, matched and asynchronously analyzed by the data packet processing method, so that real-time and rapid processing of a large number of data packets can be realized.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of aerospace measurement and control, in particular to an aerospace measurement and control network centralized monitoring data packet based on an ordered tree and a processing method thereof.
Background
The centralized monitoring data of the aerospace measurement and control network generally comprises state information release data, parameter query setting commands, control command responses and various log information. Because the functions and parameters of the equipment are different, the monitoring data formats are different greatly, and the equipment cannot be directly applied to a remote centralized monitoring system.
Accordingly, there is a need to improve one or more problems in the related art as described above.
It is noted that this section is intended to provide a background or context for the technical solutions of the present disclosure as set forth in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
An object of an embodiment of the present disclosure is to provide an ordered tree-based aerospace measurement and control network for centralized monitoring of data packets, thereby overcoming, at least to some extent, one or more of the problems caused by the limitations and disadvantages of the related art.
According to a first aspect of an embodiment of the present disclosure, there is provided an aerospace measurement and control network centralized monitoring data packet based on an ordered tree, the data packet including:
a packet header and a data field;
the packet header comprises a packet identifier, a sub-packet pointer and a data length, and is used for identifying and analyzing the data packet;
the data field comprises a parameter field and a data sub-packet, and the parameter field is arranged before the data sub-packet;
the data field consists of a packet head of a data sub-packet and the leaf nodes, and packet identifiers in all non-root father nodes of the branch nodes form a packet identifier.
In an embodiment of the disclosure, the parameter field includes:
a parameter description table;
the parameter description table corresponds to the data packets based on the ordered tree structure one by one, and is associated through the packet identification number.
In an embodiment of the disclosure, the parameter description table includes at least:
parameter number, parameter name, offset, parameter length, the packet identification number, calculation method number, calculation coefficient, and parameter description.
In an embodiment of the disclosure, the structure of the data sub-packet is the same as the structure of the data packet.
In an embodiment of the disclosure, all data in the data packet are sequentially stored in the one-dimensional array according to a tree-first traversal order.
According to a second aspect of the embodiments of the present disclosure, a method for processing a data packet is provided, which is applied to the above-mentioned centralized monitoring data packet of an aerospace measurement and control network based on an ordered tree, and the method includes:
analyzing the data packet by using an ordered tree traversal algorithm to extract a packet identification number and a parameter field;
and processing the parameter field, and calculating a parameter value to obtain a parameter physical quantity.
In one embodiment of the present disclosure, the traversing algorithm using the ordered tree comprises:
and when the data packet is analyzed, node data are not processed when traversing to the leaf nodes, all the leaf nodes of the same layer are regarded as one node, and asynchronous processing is carried out after the whole node is taken out.
In an embodiment of the disclosure, the step of processing the parameter field and calculating the parameter value to obtain the parameter physical quantity includes:
taking the packet identification number and the parameter field as input, and positioning a parameter description table according to the packet identification number;
traversing the parameter description table, and processing each item in the parameter description table to obtain a parameter key value pair consisting of a parameter number and the parameter physical quantity;
and storing or outputting the calculated physical parameter according to a preset format.
In an embodiment of the disclosure, the step of traversing the parameter description table and processing each entry in the parameter description table to obtain a parameter key pair composed of the parameter number and the parameter physical quantity includes:
extracting a parameter original code according to the offset and the parameter length;
matching a calculation method according to the calculation method number;
and calling the calculation method according to the parameter original code and the calculation coefficient, and calculating the parameter physical quantity to obtain a parameter key value pair consisting of the parameter number and the parameter physical quantity.
In an embodiment of the present disclosure, the data packet is stored in a data packet information base, and a description item of the data packet information base includes the packet identifier, a sub-packet header pointer position, a current sub-packet length, and a total length of a data field.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
in the embodiment of the disclosure, through the method for centralized monitoring of the data packets and the processing method thereof by the aerospace measurement and control network based on the ordered tree, on one hand, the data description and the analysis code are separated by designing the data packets and the parameter fields based on the ordered tree structure, and the unstable data packets are processed by using the stable codes, so that unified processing and expandability of the data packets are realized. On the other hand, the data packets are segmented, matched and asynchronously analyzed by the data packet processing method, so that real-time and rapid processing of a large number of data packets can be realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
FIG. 1 is a schematic diagram of a framework of a format of a centralized monitoring data packet for an aerospace measurement and control network based on an ordered tree in an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic diagram illustrating a structure of an ordered tree-based centralized monitoring data packet of an aerospace measurement and control network in an exemplary embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a storage mode of a centralized monitoring data packet of an aerospace measurement and control network based on an ordered tree in an exemplary embodiment of the present disclosure;
FIG. 4 is a step diagram of a method of processing a data packet in an exemplary embodiment of the present disclosure;
FIG. 5 illustrates a flow chart of the processing of a data packet in an exemplary embodiment of the present disclosure;
fig. 6 shows a flowchart of an ordered tree traversal algorithm in an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
In this example embodiment, first, an aerospace measurement and control network centralized monitoring data packet based on an ordered tree is provided. Referring to fig. 1, the data packet may include: a packet header and a data field; the packet header comprises a packet identifier, a sub-packet pointer and a data length, and is used for identifying and analyzing the data packet; the data field comprises a parameter field and a data sub-packet, and the parameter field is arranged before the data sub-packet; the data packet is in an ordered tree structure, the packet header is a branch node, the parameter value in the parameter field is a leaf node, the data field consists of the packet header of a data sub-packet and the leaf node, and the packet identifiers in all non-root parent nodes of the branch node form a packet identifier.
According to the method, the data package is monitored in a centralized manner through the aerospace measurement and control network based on the ordered tree, the data package and the parameter field based on the ordered tree structure are designed, the data description is separated from the analysis code, and the unstable data package is processed through the stable code, so that unified processing and expandability of the data package are realized.
The format of the above-described centralized monitoring data packet for an aerospace measurement and control network based on an ordered tree in this exemplary embodiment will be described in more detail with reference to fig. 1 to 3.
In one embodiment, a typical aerospace measurement and control system is in a tree structure, and the system is divided into sub-system, extension, unit and other layers from top to bottom, wherein each layer may comprise a plurality of state parameters and a plurality of sub-levels. According to this feature, the state parameters and sub-levels contained in each hierarchy are encapsulated into a data packet.
By defining the data packet and the parameter description table which accord with the actual structure level of the aerospace measurement and control equipment, a monitoring data format framework is constructed, data description and analysis codes are separated, and unstable data packets are processed by stable codes, so that unified processing and expandability of the data packets are realized.
As shown in fig. 1, the monitoring data format frame in fig. 1 shows the relationship between a data packet and an application layer data exchange protocol, the data packet is applicable to application layer data frames of various versions, an information identification field in a data frame header can be used as a key field for identifying monitoring data and sources thereof, and a data field is a data packet based on an ordered tree structure (i.e. an aerospace measurement and control network centralized monitoring data packet based on an ordered tree).
In a data packet based on an ordered tree structure, a packet header contains a packet identifier, a sub-packet pointer and 3 fields of data length, which are used for identifying and analyzing the data packet. The packet identifier occupies 1 byte, the packet header is a branch node, the packet identifiers of the branch node and all the father nodes form a packet identifier, and particularly, the packet identifiers in all the non-root father nodes of the branch node form a packet identifier which is used as a unique identifier of the data packet. The sub-packet pointer occupies 2 bytes and indicates the start position of the first data sub-packet in the data field, and when the data sub-packet is not included in the data packet, the field is filled with 0xFFFF. The data length is 2 bytes, which represents the data field length, ranging from 0 to 65535.
In the data packet based on the ordered tree structure, the data field contains a parameter field and a data sub-packet, or one of them. And when the data field comprises a parameter field and a data sub-packet, the parameter field is always arranged before the data sub-packet, the structure of the data sub-packet is completely consistent with that of the data packet, the parameter field is used for storing the state parameters of the hierarchy, and the data sub-packet corresponds to each sub-level contained in the hierarchy. In fig. 2, a packet header of a packet a based on an ordered tree structure is A0, parameter fields are A1 and A2, a packet header of a packet B is a B0, parameter fields are B1 and B2, a packet header of a packet C is a C0, parameter fields are C1 and C2, D is a packet header of a packet B, a packet header is a D0, parameter fields are D1 and D2, and A1, A2, B and C together form a data field of the packet a.
As shown in FIG. 2, the ordered tree structure-based packet structure of FIG. 2 represents a nested structure of packets that facilitates flexible customization of packets according to different hierarchies of devices. Wherein A0, B0, C0 and D0 respectively represent packet headers, which means that the packet a is nested with 3-level 4 packets (or data sub-packets), and each packet contains two status parameters with sequence numbers 1 and 2. In order to correspond to the data packet one by one, 4 parameter description tables TA, TB, TC and TD are defined, each parameter description table containing 2 data lines.
The packet identifiers in the corresponding 4 parameter description tables are 01, 0102, 0103 and 010204, respectively, if the 4 packet identifiers in fig. 2 are defined as 0x01, 0x02, 0x03 and 0x04, respectively. And adding a parameter number, a parameter name, an offset, a parameter length, a calculation method number, a calculation coefficient and a parameter description for the parameters in the parameter description table to form a complete parameter description table. The parameter description table is stored in the form of a database table or an XML file. Wherein, the parameter number is the unique identifier of the parameter; the parameter name is Chinese description of the parameter name; the offset is the relative offset of the parameter in the data packet; the parameter length is the number of bytes occupied by the parameter; the packet identification number is the packet identification number of the data packet where the parameter is located and is used for associating the parameter with the data packet; the calculation method number is a calculation method for the physical quantity of the identification parameter; the calculation coefficients are input parameters of a calculation method, such as conversion coefficients and the like; the parameter description is a detailed description of the parameter name.
Assuming that the status parameter lengths included in the 4 packets in fig. 2 are all 1 byte (denoted by 0 xFF), the sub-packet pointers in the packet headers of the corresponding 4 packets are 0x0002, 0xFFFF, and the data lengths are 0x0017, 0x0010, 0x0002, and 0x0002, respectively.
As shown in fig. 3, the data storage mode of the data packet based on the ordered tree structure in fig. 3 represents that all data in the data packet in fig. 2 are sequentially stored in a one-dimensional array according to the order of traversal of the order, and based on the above conditions, the storage structure of the data packet in the memory is as follows (hexadecimal, based on small-end storage):
01 02 00 17 00 FF FF 02 02 00 10 00 FF FF 04 FF FF 02 00 FF FF 03 FF FF 02 00 FF FF。
further, in this example embodiment, a method for processing a data packet is further provided, which is used for processing the foregoing centralized monitoring data packet of the aerospace measurement and control network based on the ordered tree. Referring to fig. 4, the method includes: step S101 to step S102.
Step S101: and analyzing the data packet by using an ordered tree traversal algorithm to extract a packet identification number and a parameter field.
Step S102: and processing the parameter field, and calculating a parameter value to obtain a parameter physical quantity.
Specifically, the first step is implemented by adopting an ordered tree traversal algorithm, and packet identification numbers and parameter fields of all data packets (or data sub-packets) are extracted by analyzing packet headers and data fields.
When calculating the parameter value, the parameter field output by the analysis data packet is asynchronously processed by adopting a reverse mapping method based on a parameter description table, and the specific processing steps are as follows: taking the packet identification number and the parameter field as input, and positioning a parameter description table according to the packet identification number; taking the packet identification number and the parameter field as input, and positioning the parameter description table according to the packet identification number; traversing the parameter description table, and processing each item in the parameter description table to obtain a parameter key value pair consisting of a parameter number and a parameter physical quantity; and storing or outputting the calculated physical parameter according to a preset format.
Wherein, the processing steps of each item in the parameter description table are as follows: extracting a parameter original code according to the offset and the parameter length; matching a calculation method according to the calculation method number; and calling a calculation method according to the parameter original code and the calculation coefficient, and calculating the parameter physical quantity to obtain a parameter key value pair consisting of the parameter number and the parameter physical quantity.
In one embodiment, a data packet based on an ordered tree structure is used as transmission content of an application layer data frame, firstly, the application layer data frame is preprocessed, a data source is analyzed, and a space measurement and control network centralized monitoring data packet based on an ordered tree is obtained; and then processing according to a data packet processing method.
As shown in fig. 5, the monitoring data format processing flow in fig. 5 shows that the application layer data frame processing environment includes a data frame processing program and a frame structure description, and is input as an application layer data frame and output as a data packet based on an ordered tree structure. The frame structure description is a description of a frame header structure of an application layer data frame for identifying a data source and acquiring a data packet based on an ordered tree structure.
The supervisory data format process flow of fig. 5 illustrates that the packet processing environment includes a packet processing program and a packet information base, inputs as packets based on an ordered tree structure, and outputs as packet identification numbers and parameter fields for each packet (or sub-packet).
The description item of the data packet information base comprises a packet identification number, a sub-packet head pointer position, a current sub-packet length and a total length of a data field, and is used for identifying a parameter field and the data sub-packet in the data packet. The packet information base is a type, and each packet (or sub-packet) has a packet information base object corresponding to it.
The structure of data packets from different sources is generally different, so that an information base needs to be constructed to facilitate unified processing of the data packets. The description items of the data packet information base are as follows: a packet identification number for distinguishing parameter description tables of different data packets; the sub-packet head pointer position is used for judging the end position of the parameter field and the start position of the data sub-packet; the current sub-packet position is used for extracting the current data sub-packet; the current sub-packet length is used for extracting the current data sub-packet; and the total length of the data field is used for judging whether the parameter field or the data sub-packet is processed. The data packet information base based on the description items is constructed, a large amount of monitoring data is divided and delivered to a data processing system for analysis and matching, and real-time and rapid processing of a large amount of original data can be realized.
The traversal of the ordered tree generally adopts a recursion method, and the nodes in the tree are processed one by one according to a certain sequence. This traversal algorithm is inefficient when there are too many nodes in the tree. In the data packet based on the ordered tree structure, the leaf nodes occupy larger area, so the application optimizes the tree preface traversal algorithm, when traversing to the leaf nodes, all the leaf nodes in the same layer are regarded as one node, the whole is taken out and then asynchronously processed, the problem of lower efficiency of the recursion traversal algorithm when the leaf nodes are too many can be solved, the optimized algorithm (namely the ordered tree traversal algorithm) flow is shown in figure 6, and the algorithm output is a packet identification number and a parameter field.
The ordered tree traversal algorithm is as follows:
the criterion of containing the leaf nodes is whether the sub-packet pointers in the packet header are 0, if so, the leaf nodes are not contained, otherwise, the leaf nodes are contained;
when a leaf node is positioned, the starting position is 0, and the length is a sub-packet pointer in the packet header;
when outputting the leaf nodes, synchronously generating and outputting packet identification numbers;
the criterion of containing the branch node is whether the sub-packet pointer in the packet header is 0xFFFF, if yes, the branch node is not contained, otherwise, the branch node is contained;
when the next branch node is extracted, the starting position is the current sub-packet position plus the current sub-packet length;
the processed criterion of the branch node is whether the recursion processing of the sub-packet is created and completed, if yes, the branch node is processed, otherwise, the branch node is not processed;
the criterion of the branching nodes is whether the total length of the data field is equal to the current sub-packet position plus the current sub-packet length, if yes, no branching nodes exist, otherwise, branching nodes exist.
In addition, the process flow of the monitoring data format in fig. 5 shows that the parameter field processing environment includes a parameter field processing program and a parameter description table, and inputs a packet identification number and a parameter field for each data packet (or data sub-packet) and outputs a parameter key value pair composed of a parameter number and a parameter physical quantity for each data packet (or data sub-packet).
The parameter field processing program is to realize the parameter field processing flow in the technical scheme, and adopts the inverse mapping method asynchronous processing based on the parameter description table. The calculation method and calculation coefficient in the process flow are listed as follows:
the integer, character type and date and time type are directly converted from byte type, and no calculation coefficient exists;
the floating point type is divided into two types, one type is obtained by directly converting byte type without calculation coefficient, the other type is obtained by converting byte type into integer type and multiplying calculation coefficient;
the enumeration type parameter calculation coefficient is the combination description of the parameter original code and the parameter physical quantity, and the format is as follows:
{ parameter original code 1: parameter physical quantity 1, parameter original code 2: parameter physical quantity 2, …, parameter original code m: parameter physical quantity n }
Wherein m represents an mth parameter original code, n represents an nth parameter physical quantity, and m and n are equal. The calculation method is to search the above combination description to obtain the parameter physical quantity.
According to the method for intensively monitoring the data packets and the processing method thereof, the data packets and the parameter description table based on the ordered tree structure are designed, the data description and the analysis codes are separated, and the unstable data packets are processed by using the stable codes, so that unified processing and expandability of the data packets are realized; by designing an ordered tree traversal algorithm, a data packet information base and a data packet processing method based on an ordered tree structure, the data packets are segmented, matched and asynchronously analyzed, and real-time and rapid processing of a large number of data packets can be realized.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains.
Claims (10)
1. The utility model provides a space flight measurement and control net centralized monitoring data package based on ordered tree which characterized in that, this data package includes:
a packet header and a data field;
the packet header comprises a packet identifier, a sub-packet pointer and a data length, and is used for identifying and analyzing the data packet;
the data field comprises a parameter field and a data sub-packet, and the parameter field is arranged before the data sub-packet;
the data field consists of a packet head of a data sub-packet and the leaf nodes, and packet identifiers in all non-root father nodes of the branch nodes form a packet identifier.
2. The ordered tree based aerospace measurement and control network centralized monitoring data packet according to claim 1, wherein the parameter fields comprise:
a parameter description table;
the parameter description table corresponds to the data packets based on the ordered tree structure one by one, and is associated through the packet identification number.
3. The ordered tree-based centralized monitoring data packet for the aerospace measurement and control network according to claim 2, wherein the parameter description table at least comprises:
parameter number, parameter name, offset, parameter length, the packet identification number, calculation method number, calculation coefficient, and parameter description.
4. The ordered tree-based aerospace measurement and control network centralized monitoring data packet according to claim 3, wherein the data sub-packet has the same structure as the data packet.
5. The ordered tree-based aerospace measurement and control network centralized monitoring data packet according to claim 1, wherein all data in the data packet are sequentially stored in a one-dimensional array according to a tree-first traversal order.
6. The method for processing the data packet is characterized by being applied to the ordered tree-based aerospace measurement and control network centralized monitoring data packet according to any one of claims 1-5, and the method comprises the following steps:
analyzing the data packet by using an ordered tree traversal algorithm to extract a packet identification number and a parameter field;
and processing the parameter field, and calculating a parameter value to obtain a parameter physical quantity.
7. The method of claim 6, wherein the using an ordered tree traversal algorithm comprises:
and when the data packet is analyzed, node data are not processed when traversing to the leaf nodes, all the leaf nodes of the same layer are regarded as one node, and asynchronous processing is carried out after the whole node is taken out.
8. The method of claim 6, wherein the step of processing the parameter field to calculate a parameter value to obtain a parameter physical quantity comprises:
taking the packet identification number and the parameter field as input, and positioning a parameter description table according to the packet identification number;
traversing the parameter description table, and processing each item in the parameter description table to obtain a parameter key value pair consisting of a parameter number and the parameter physical quantity;
and storing or outputting the calculated physical parameter according to a preset format.
9. The method according to claim 8, wherein the step of traversing the parameter description table and processing each entry in the parameter description table to obtain a parameter key pair composed of the parameter number and the parameter physical quantity comprises:
extracting a parameter original code according to the offset and the parameter length;
matching a calculation method according to the calculation method number;
and calling the calculation method according to the parameter original code and the calculation coefficient, and calculating the parameter physical quantity to obtain a parameter key value pair consisting of the parameter number and the parameter physical quantity.
10. The method of claim 6, wherein the data packet is stored in a data packet information base, and wherein the description items of the data packet information base include the packet identification number, a sub-packet header pointer location, a current sub-packet length, and a total length of a data field.
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