CN110290089B - Communication method and device, computer equipment and storage medium applied to high-speed industrial communication system - Google Patents

Communication method and device, computer equipment and storage medium applied to high-speed industrial communication system Download PDF

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Publication number
CN110290089B
CN110290089B CN201910606576.5A CN201910606576A CN110290089B CN 110290089 B CN110290089 B CN 110290089B CN 201910606576 A CN201910606576 A CN 201910606576A CN 110290089 B CN110290089 B CN 110290089B
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pilot
frequency domain
data
sub
frequency
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CN110290089A (en
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康良川
邵枝晖
史兢
欧春湘
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Beijing Neuron Network Technology Co ltd
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Beijing Neuron Network Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

The present disclosure relates to a communication method, a transmission apparatus, a computer device, and a computer-readable storage medium applied to a high-speed industrial communication system. The high-speed industrial communication system is mainly used for solving the problems that the traditional bus of the industrial field is low in bandwidth, cannot simultaneously bear real time and non-real time and is complex in network structure, can support IPV6 address communication, can support time-triggered industrial control communication, can support TSN, and can support safety mechanisms such as white lists, depth detection, data encryption and the like. By allowing the mixed arrangement of the pilot frequency structure, the utilization efficiency of the communication resources of the high-speed industrial communication system is improved and the communication real-time performance is improved by using the frequency domain discrete pilot frequency structure, the distribution of the frequency domain continuous pilot frequency structure can not be restricted by the distribution period, and the time frequency resources can be flexibly distributed to the user equipment connected on the industrial communication system according to the requirement.

Description

Communication method and device, computer equipment and storage medium applied to high-speed industrial communication system
Technical Field
The present disclosure relates generally to the field of high-speed industrial communication systems, and more particularly, to a communication method, a transmission apparatus, a computer device, and a computer-readable storage medium applied to a high-speed industrial communication system.
Background
In the industrial field, a plurality of industrial devices (e.g., measurement instruments) are usually attached to an industrial bus, and each industrial device can communicate via the industrial bus, such as transmitting control signals and data signals for controlling the industrial devices to perform industrial production activities.
Typically, the industrial bus is a field bus, and the communication is performed in a wired manner. Data transmission is generally performed by using a baseband transmission method. Baseband transmission is a transmission mode without moving a baseband signal spectrum, and actually, a signal to be transmitted is a baseband signal, so that a step of modulating a carrier is omitted. The transmission distance of baseband transmission is short, the data amount of parallel transmission is small, and the anti-interference performance is poor.
Conventionally, it is generally recognized in the art that it is sufficient for an industrial control bus to be able to handle low speed data, since it is typically the control parameters, and a small amount of low definition video data, that are transmitted over the industrial control bus. However, with the development of big data and the popularization of intelligent devices, more and more data need to be transmitted in the industrial bus, the transmission rate requirement is higher, and meanwhile, the complexity and the transmission difficulty of the data are greatly increased. In view of the above problems, the baseband transmission has been unable to meet the current data transmission requirements.
It is to be noted that the statements made in the background section above are only provided to enhance the understanding of the technical background of the present disclosure and do not, of course, represent prior art which is certainly known to those of ordinary skill in the art.
Disclosure of Invention
In view of the above, one of the objectives of the technical solutions described in the present disclosure is to provide an improved communication method applied to a high-speed industrial communication system.
In a first aspect, a communication method applied to a high-speed industrial communication system is provided. The method comprises the following steps: receiving a data stream to be transmitted; and modulating the data stream to be transmitted to a plurality of sub-bands of physical communication resources of the high-speed industrial communication system by utilizing an OFDM technology, wherein each sub-carrier included in the sub-bands is used for carrying pilot frequency data or service data, and the pilot frequency data is transmitted by adopting a frequency domain scattered pilot frequency structure and a frequency domain continuous pilot frequency structure. The physical communication resources are logically divided into a plurality of subbands each of which includes a plurality of subcarriers per OFDM symbol. In the frequency domain discrete pilot structure, all OFDM symbols in an allocation period are divided into a plurality of groups, the pilot data are distributed discretely in each subband, and the pilot data occupy subcarriers of all frequency points in the same-position subband of each group in the plurality of groups. The frequency domain continuous pilot structure comprises at least two sub-bands under the same frequency band, and pilot data are continuously distributed in at least one sub-band.
In a second aspect, a communication device for application in a high speed industrial communication system is provided. The device includes: a receiving unit, configured to receive a data stream to be transmitted; and a transmitting unit, configured to modulate the data stream to be transmitted onto multiple subbands of physical communication resources of the high-speed industrial communication system by using an OFDM technique, where each subcarrier included in a subband is used to carry pilot data or traffic data, and the pilot data is transmitted by using a frequency domain scattered pilot structure and a frequency domain continuous pilot structure. The physical communication resources are logically divided into a plurality of subbands each of which includes a plurality of subcarriers per OFDM symbol. In the frequency domain discrete pilot structure, all OFDM symbols in an allocation period are divided into a plurality of groups, the pilot data are distributed discretely in each subband, and the pilot data occupy subcarriers of all frequency points in the same-position subband of each group in the plurality of groups. The frequency domain continuous pilot structure comprises at least two sub-bands under the same frequency band, and pilot data are continuously distributed in at least one sub-band.
In a third aspect, there is provided a computer device applied to a high-speed industrial communication system, comprising: a communication interface; a memory having computer-executable instructions stored thereon; a processor configured to execute the computer-executable instructions to perform the method according to the preceding aspects.
In a fourth aspect, there is provided a computer-readable storage medium comprising computer-executable instructions stored thereon which, when executed by a processor, perform the method according to the preceding aspects.
In the above aspects, further, in the frequency domain scattered pilot structure, the physical communication resource is logically divided into a plurality of groups, and a placement position and a distribution structure of pilot data between subbands in each of the plurality of groups are different or the same.
In the above aspects, further, the distribution of the pilot data within the subbands is a comb-type structure, a block-type structure, or a mixed structure of the two.
In the above aspects, further, in the frequency domain scattered pilot structure, the physical communication resource is logically divided into groups, and the same user equipment of the high-speed industrial communication system is allocated to the same co-located sub-band in each group.
In the various aspects above, further, each user device may occupy multiple subbands in each group.
In the above aspects, a certain subband arranged in one of the groups is a frequency domain scattered pilot structure, and a collocated subband arranged in the other group of the groups is a frequency domain scattered pilot structure.
According to various embodiments of the present invention, by allowing a hybrid arrangement of pilot structures, the use of a frequency domain scattered pilot structure improves the utilization efficiency of communication resources of a high-speed industrial communication system and improves the communication real-time performance, and the allocation of a frequency domain continuous pilot structure may not be restricted by an allocation period, and time-frequency resources may be flexibly allocated to user equipments connected to the industrial communication system as needed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure. For a person skilled in the art, without inventive effort, further figures can be obtained from these figures. In the drawings:
FIG. 1 illustrates a schematic diagram of a high-speed industrial communication system in which embodiments of the present invention may be implemented;
fig. 2 schematically shows a flow chart of a communication method applied to a high speed industrial communication system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a time-frequency resource structure of a high-speed industrial communication system according to an embodiment of the present invention;
FIG. 4 is a diagram schematically illustrating an allocation cycle of time-frequency resources according to an embodiment of the present invention;
fig. 5 schematically shows a diagram of subcarriers of a time-frequency resource according to an embodiment of the invention;
FIG. 6 is a diagram schematically illustrating a distribution of pilot structures according to an embodiment of the present invention;
fig. 7 is a diagram showing a distribution structure of pilot data in one subband;
FIG. 8 is a diagram schematically illustrating subband partitioning and pilot structure of a high speed industrial communication system according to an embodiment of the present invention;
fig. 9 schematically shows a schematic diagram of a communication device applied to a high speed industrial communication system according to an embodiment of the present invention; and
fig. 10 schematically shows a schematic configuration of a computer apparatus according to an embodiment of the present invention.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments can be modified in various different ways, without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and the following description are to be regarded as illustrative in nature and not restrictive.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. Furthermore, for ease of illustration, optional steps in the following detailed description are shown in dashed box form.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that the number of technical features indicated is significant. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present disclosure, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected: may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the disclosure. To simplify the disclosure of the present disclosure, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present disclosure. Moreover, the present disclosure may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.
The high-speed industrial communication system is mainly used for solving the problems that the traditional bus of the industrial field is low in bandwidth, cannot simultaneously bear real time and non-real time and is complex in network structure, can support IPV6 address communication, can support time-triggered industrial control communication, can support TSN, and can support safety mechanisms such as white lists, depth detection, data encryption and the like.
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, and it is to be understood that the preferred embodiments described herein are merely for purposes of illustrating and explaining the present disclosure and are not to be taken as limiting the same.
Fig. 1 shows a schematic diagram of a high speed industrial communication system 100 in which embodiments of the present invention may be implemented. Referring to fig. 1, four industrial nodes, node 1, node 2, node 3 and node 4, are shown interconnected by a high speed industrial communication system 110. In fig. 1, node 1 is shown as a sender of data, and nodes 2, 3 and 4 are shown as receivers of data.
A node may be any possible electronic device having the capability to communicate via a high speed industrial communication system, typically also having some data processing capabilities. For example, a node may include, but is not limited to, an industrial computer, an industrial line control device, a robot, a smart phone, a Portable Digital Assistant (PDA), a laptop computer, a pager, a television, a camera, a video recorder, a GPS device, and possibly other devices that may be present in an industrial control scenario.
Embodiments of the present disclosure relate to the transmission of data over high-speed industrial communication systems operating at the physical layer or equivalent of the OS I reference model, involving the scheduling, organization and communication of physical communication resources. The basic principle of the disclosed embodiment is to apply the OFDM communication system to a high-speed industrial communication system, and meet the requirement of high-speed data communication of the high-speed industrial communication system.
Fig. 2 schematically shows a flow chart of a communication method 200 applied to a high speed industrial communication system according to an embodiment of the present invention.
In step S210, a data stream to be transmitted is received. The data stream to be transmitted can be understood as data from a higher layer in the OSI reference model, for example from the network layer.
In step S220, the data stream to be transmitted is modulated onto a plurality of subbands of physical communication resources of the high-speed industrial communication system by using an OFDM technique, where each subcarrier included in a subband is used for carrying pilot data or traffic data, and the transmission employs a frequency domain scattered pilot structure and a frequency domain continuous pilot structure.
According to an embodiment of the present invention, the physical communication resources are logically divided into a plurality of subbands each of which includes a plurality of subcarriers, each OFDM symbol. For the frequency domain scattered pilot structure, all OFDM symbols in an allocation period are divided into a plurality of groups, pilot data are distributed discretely in each sub-band, and the pilot data occupy sub-carriers of all frequency points in the sub-band at the same position of each group in the plurality of groups. For the frequency domain continuous pilot structure, the frequency domain continuous pilot structure comprises at least two sub-bands under the same frequency band, and the pilot data is continuously distributed in at least one sub-band.
The implementation principle of the present invention is described below with reference to fig. 3 to 6.
Fig. 3 is a schematic diagram of a time-frequency resource structure of a high-speed industrial communication system according to an embodiment of the present invention. In fig. 3, the lateral direction represents time, and the longitudinal direction represents frequency. As shown, in the lateral direction, N is showncSub-carriers, i.e. NcA different frequency. The time element and the frequency element are orthogonal to each other, and one logical communication resource formed by the intersection of the two is called a subcarrier. The combination of all subcarriers over one time unit (slot) is also referred to herein as one OFDM symbol. It can be seen that one OFDM symbol includes NcAnd (4) sub-carriers.
Fig. 4 is a schematic diagram illustrating an allocation cycle of time-frequency resources according to an embodiment of the present invention. Referring to fig. 4, one communication resource allocation period may include M groups, M being greater than or equal to 2. One group comprises NuA symbol, NuGreater than or equal to 1. N is a radical ofuCan represent the number of user devices onto a high speed industrial communication system.
Fig. 5 schematically shows a diagram of subcarriers of a time-frequency resource according to an embodiment of the invention. Referring to fig. 5, each symbol is divided into NsbNumber of sub-bands, NsbGreater than or equal to 1. Thus, each subband may include N1Sub-carriers, N1＝Nc/Nsb。
According to the embodiment of the invention, for the transmission of the data stream, a mixed structure of a frequency domain scattered pilot structure and a frequency domain continuous pilot structure of the sub-bands is adopted. The frequency domain continuous pilot structure sub-bands can be in any position of one allocation period. The frequency domain scattered pilot structure sub-band can be at any position of one group, if a certain sub-band configured to a group is the frequency domain scattered pilot structure, the other groups of the position sub-bands configured to an allocation period are correspondingly configured to be the frequency domain scattered pilot structure. Fig. 6 is a schematic diagram illustrating a distribution of a pilot structure according to an embodiment of the present invention, wherein the sub-bands shown in green represent a frequency domain scattered pilot structure, the sub-bands shown in purple represent a frequency domain continuous pilot structure, and the sub-bands shown in light gray represent that the sub-bands are not used.
According to one embodiment of the invention, the minimum allocation unit of the frequency domain continuous pilot structure is N of continuous symbols of the same frequency band2Number of sub-bands, N2Greater than or equal to 2, wherein at least 1 sub-band is placed with pilot frequency, and the rest sub-bands are placed with data. That is, the frequency domain continuous pilot structure includes at least two sub-bands in the same frequency band, and the pilot data is continuously distributed in at least one sub-band. The minimum time granularity of the frequency domain continuous pilot frequency is 2 sub-bands under the same frequency band, pilot frequency is placed in 1 sub-band, and data is sent by 1 sub-band. In one embodiment, N can be assigned to a user device on a high-speed industrial communication system4Minimum allocation unit, N, of a frequency domain continuous pilot structure4Greater than or equal to 1.
According to an embodiment of the present invention, in the above logical partition manner of video resources, for the sub-bands adopting the frequency domain scattered pilot structure, the number of sub-carriers that can be used for placing pilots in each sub-band is N3N is3＝N1/M to satisfy pilot dataAnd the subcarriers of all frequency points are occupied in the same-position subbands of each group in the multiple groups. The pilot locations on the co-located subbands in each of the plurality of groups are configured to cover all of the subcarriers included in that subband.
In one embodiment, in the frequency domain scattered pilot structure, the physical communication resources are logically divided into groups, and the placement position and distribution structure of pilot data among subbands in each of the groups are different or the same. The distribution of pilot data within the subbands is a comb-type structure, a block-type structure, or a hybrid structure of the two.
Fig. 7 is a diagram showing a comb-type structure distribution and a block-type structure distribution of pilot data within one sub-band. Referring to fig. 7, an ith subband group in one resource allocation period is shown, in which two subbands are shown. The pilot blocks are distributed in a comb-like structure in the left subband and in a block-like structure in the right subband.
In one embodiment, for allocating a frequency domain scattered pilot structure to a user equipment in a high-speed industrial communication system, each group of frequency domain scattered pilot structure sub-bands is a minimum allocation unit, each group of co-located frequency domain scattered pilot structure sub-bands is allocated to the same user equipment, and one user equipment in a group can occupy a plurality of frequency domain scattered pilot structure sub-bands.
According to an embodiment of the present invention, an OFDM communication scheme is adopted in a high-speed industrial communication system, and pilot data is discretely allocated within one subband. Thus, one sub-band can be allocated to a user in real time, and high real-time performance is achieved.
An exemplary embodiment of the present invention is described below with reference to fig. 8.
Fig. 8 is a diagram schematically illustrating subband division and a pilot structure of a high-speed industrial communication system according to an embodiment of the present invention. In the example shown in fig. 8, a schematic diagram of logical resource partitioning for one resource allocation period is shown.
Referring to fig. 8, 8 OFDM symbols of one resource partition period are shown in the horizontal direction (representing time), divided into 4 groups, and 8 subcarriers are shown in the vertical direction (representing frequency). Each symbol is divided into 2 subbands. Thus, in fig. 7, one symbol includes 8 subcarriers, each subband includes 4 subcarriers, one allocation period includes 4 groups, and one group includes 4 symbols. Each group comprising 8 subbands.
In fig. 8, the subbands shown in 801 represent frequency domain scattered pilot structure subbands, where one of 4 subcarriers is used for carrying pilot data (shown in light yellow), and the remaining three are used for carrying traffic data. The subbands denoted by 802 represent subbands of a frequency-domain continuous pilot structure, where one basic unit is three subbands in the horizontal direction, and 4 subcarriers in one subband are all used for carrying pilot data. The frequency domain contiguous pilot structure subbands shown in fig. 8 are three laterally adjacent subbands, but it should be understood that the subbands that make up the frequency domain contiguous pilot structure subbands may be laterally spaced subbands.
In the example shown in fig. 8, in each group, 2 subbands are configured as 2 frequency-domain scattered pilot structures, 6 subbands are configured as 2 frequency-domain continuous pilot structures, and the division unit of the frequency-domain continuous pilot structure is 3 subbands of a same-frequency-band continuous symbol.
The minimum time granularity of the frequency domain continuous pilot frequency is 2 symbols, pilot frequency is placed in 1 symbol, and data is sent in 1 symbol, so that the resource utilization rate is 50%. Therefore, when the time granularity of the frequency domain continuous pilot frequency is smaller, the frequency domain discrete pilot frequency structure has higher resource utilization rate. When the time granularity of the frequency domain continuous pilot frequency is large, for example, the time granularity comprises 8 symbols, 1 symbol places the pilot frequency, 7 symbols send data, the cycle period is 8 symbols, and the resource utilization rate of the frequency domain continuous pilot frequency is improved. Therefore, when the time granularity of the frequency domain continuous pilot is larger, the frequency domain discrete pilot structure has better real-time performance.
Therefore, according to the embodiments of the present invention, by allowing a hybrid arrangement of the pilot structures, the use of the frequency domain scattered pilot structure improves the utilization efficiency of the communication resources of the high-speed industrial communication system and improves the communication real-time performance, and the allocation of the frequency domain continuous pilot structure may not be restricted by the allocation period, and the time frequency resources may be flexibly allocated to the user equipment connected to the bus system as needed. If a user has a high real-time requirement, the frequency domain scattered pilot structure can be selected to be allocated to the user. Embodiments according to the present invention may be applicable to situations where there are higher demands on communication rate and communication capacity.
Fig. 9 schematically shows a schematic diagram of a communication device 900 applied to a high-speed industrial communication system according to an embodiment of the present invention. The apparatus 900 includes: the system comprises a receiving unit used for receiving the data stream to be transmitted and a transmitting unit used for modulating the data stream to be transmitted to a plurality of sub-bands of physical communication resources of a high-speed industrial communication system by utilizing OFDM technology, wherein each sub-carrier included in the sub-bands is used for bearing pilot frequency data or service data, and the pilot frequency data is transmitted by adopting a frequency domain scattered pilot frequency structure and a frequency domain continuous pilot frequency structure. The physical communication resources are logically divided into a plurality of subbands each of which includes a plurality of subcarriers per OFDM symbol. In the frequency domain discrete pilot structure, all OFDM symbols in an allocation period are divided into a plurality of groups, the pilot data are distributed discretely in each subband, and the pilot data occupy subcarriers of all frequency points in the same-position subband of each group in the plurality of groups. The frequency domain continuous pilot structure comprises at least two sub-bands under the same frequency band, and pilot data are continuously distributed in at least one sub-band.
Fig. 10 schematically shows a schematic configuration of a computer apparatus according to an embodiment of the present invention. The computer device 12 shown in FIG. 10 is only an example and should not bring any limitations to the functionality or scope of use of embodiments of the present invention.
As shown in FIG. 10, computer device 12 is embodied in the form of a general purpose computing device. The components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16. The computer device 12 may be a device that is hooked up to a high-speed industrial communication system.
Bus 18 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MCA) bus, an enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.
Computer device 12 typically includes a variety of computer system readable media. Such media may be any available media that is accessible by computer device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)30 and/or cache memory 32. Computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 4, and commonly referred to as a "hard drive"). Although not shown in FIG. 4, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a Compact disk Read-Only Memory (CD-ROM), Digital Video disk (DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. System memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.
Computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), with one or more devices that enable a user to interact with computer device 12, and/or with any devices (e.g., network card, modem, etc.) that enable computer device 12 to communicate with one or more other computing devices. Such communication may be through an Input/Output (I/O) interface 22. Also, computer device 12 may communicate with one or more networks (e.g., Local Area Network (LAN), Wide Area Network (WAN)) via Network adapter 20. As shown, Network adapter 20 communicates with other modules of computer device 12 via bus 18. it should be understood that although not shown in FIG. 4, other hardware and/or software modules may be used in conjunction with computer device 12, including without limitation, microcode, device drivers, Redundant processing units, external disk drive Arrays, (Redundant Arrays of Inesponsive Disks, RAID) systems, tape drives, data backup storage systems, and the like.
The processing unit 16 executes various functional applications and data processing, such as implementing a real-time communication method provided by any of the embodiments of the present invention, by executing programs stored in the system memory 28.
In one embodiment, a computer-readable storage medium is provided that includes computer-executable instructions stored thereon that, when executed by a processor, perform various operations according to embodiments of the present invention.
According to the embodiment of the disclosure, a multi-node, high-bandwidth and time-sensitive high-speed industrial communication system is provided, which is used for automatically controlling the transmission and application of real-time data and non-real-time data in industrial fields such as process control and discrete control, and is compatible with applications such as ISO/IEC/IEEE 8802-3 Ethernet and IPv 6. The high-speed industrial communication system has the characteristics of high bandwidth, high real-time performance, long distance and high reliability transmission, is simple in wiring and installation, provides convenient network maintenance, and supports the utilization of the existing cable assets.
It should be appreciated that the foregoing various exemplary methods and apparatus can be implemented at various user devices connected in a high speed industrial communication system, which can be implemented in various ways, for example, in some embodiments, the foregoing various apparatus can be implemented using software and/or firmware modules, as well as hardware modules. Other ways, now known or later developed, are also feasible, and the scope of the present invention is not limited in this respect.
In particular, embodiments of the invention may be implemented in the form of a computer program product, in addition to hardware embodiments. For example, the method 200 described with reference to FIG. 2 may be implemented by a computer program product. The computer program product may be stored in RAM, ROM, hard disk and/or any suitable storage medium or downloaded over a network from a suitable location to a computer system. The computer program product may comprise computer code portions comprising program instructions executable by a suitable processing device.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and modules thereof of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, such as firmware.
It should be noted that although in the above detailed description several modules or sub-modules of the apparatus are mentioned, this division is only not mandatory. Indeed, the features and functions of two or more of the modules described above may be implemented in one module according to embodiments of the invention. Conversely, the features and functions of one module described above may be further divided into embodiments by a plurality of modules.
While the invention has been described with reference to what are presently considered to be the embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. On the contrary, the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Although the present disclosure has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims (10)

1. A communication method applied to a high-speed industrial communication system comprises the following steps:
receiving a data stream to be transmitted; and
modulating the data stream to be transmitted onto a plurality of sub-bands of physical communication resources of a high-speed industrial communication system by utilizing OFDM technology, wherein each sub-carrier included in a sub-band is used for carrying pilot frequency data or service data, and the pilot frequency data is transmitted by adopting a frequency domain scattered pilot structure of the sub-band and a frequency domain continuous pilot structure of the sub-band,
wherein the physical communication resources are logically divided into a plurality of subbands each of which includes a plurality of subcarriers,
wherein, in the frequency domain discrete pilot structure, all OFDM symbols in an allocation period are divided into multiple groups, the pilot data are distributed discretely in each subband, and the pilot data occupy the subcarriers of all frequency points in the same-position subband of each group in the multiple groups,
the frequency domain continuous pilot frequency structure comprises at least two sub-bands under the same frequency band, and pilot frequency data are continuously distributed in at least one sub-band.
2. The method of claim 1, wherein the physical communication resource is logically divided into frequency domain scattered pilot structures, the placement position and distribution structure of pilot data among subbands in each of the plurality of groups are different or the same, and the distribution of pilot data within subbands is a comb-type structure, a block-type structure, or a mixed structure of the two.
3. The method as claimed in claim 1, wherein, in the frequency domain scattered pilot structure, the physical communication resources are logically divided into groups, and the same user equipment in each group is allocated to the same user equipment of the high-speed industrial communication system, and each user equipment can occupy a plurality of sub-bands in each group.
4. The method according to any of claims 1-3, wherein the physical communication resources are logically divided in such a way that a certain subband configured in one of the groups is a frequency domain scattered pilot structure, while co-located subbands configured in other groups of the groups are frequency domain scattered pilot structures.
5. A communication device for use in a high speed industrial communication system, comprising:
a receiving unit, configured to receive a data stream to be transmitted; and
a transmitting unit, configured to modulate the data stream to be transmitted onto multiple subbands of physical communication resources of a high-speed industrial communication system by using an OFDM technique, where each subcarrier included in a subband is used to carry pilot data or traffic data, and the pilot data is transmitted by using a frequency domain scattered pilot structure and a frequency domain continuous pilot structure,
wherein the physical communication resources are logically divided into a plurality of subbands each of which includes a plurality of subcarriers,
wherein, in the frequency domain discrete pilot structure, all OFDM symbols in an allocation period are divided into multiple groups, the pilot data are distributed discretely in each subband, and the pilot data occupy the subcarriers of all frequency points in the same-position subband of each group in the multiple groups,
the frequency domain continuous pilot frequency structure comprises at least two sub-bands under the same frequency band, and pilot frequency data are continuously distributed in at least one sub-band.
6. The communication apparatus according to claim 5, wherein in the frequency domain scattered pilot structure, the physical communication resource is logically divided into a plurality of groups, a placement position and a distribution structure of pilot data between subbands in each of the plurality of groups are different or the same, and a distribution of pilot data within a subband is a comb-type structure, a block-type structure, or a mixed structure of the two.
7. The communication apparatus of claim 5, wherein in the frequency domain scattered pilot structure, the physical communication resource is logically divided into a plurality of sub-bands, and the sub-bands at the same position in each group are allocated to the same user equipment of the high speed industrial communication system, and each user equipment can occupy a plurality of sub-bands in each group.
8. The communication apparatus according to any of claims 5-7, wherein the physical communication resources are logically divided such that a certain subband configured in one of the groups is a frequency domain scattered pilot structure, while co-located subbands configured in other groups of the groups are frequency domain scattered pilot structures.
9. A computer device for use in a high speed industrial communication system, comprising:
a communication interface;
a memory having computer-executable instructions stored thereon;
a processor configured to execute the computer-executable instructions to perform the method of any of claims 1-4.
10. A computer-readable storage medium comprising computer-executable instructions stored thereon which, when executed by a processor, perform the method of any of claims 1-4.
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