CN102707920B - Data processing equipment and method for filtering identical AIS messages - Google Patents
Data processing equipment and method for filtering identical AIS messages Download PDFInfo
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Abstract
The invention discloses data processing equipment for filtering identical AIS (Automatic Identification System) messages. The data processing equipment comprises an information I/O (Input/Output) interface, and is characterized by further comprising an information processing module and information storage equipment, wherein the information processing module comprises an identical AIS message filtration module. A data processing method for filtering identical AIS messages comprises the following steps: comparing data of both AIS messages in information and AIS messages in information of an information buffering queue, if the AIS messages are different, storing the information including the AIS messages into the information storage equipment or outputting the information including the AIS messages through the information I/O interface and managing and processing the information buffering queue, and if the AIS messages are identical, the information including the AIS messages is abandoned and managing and processing the waste information queue. The invention has the characteristics that data redundancy is reduced, and the information storage, transmission and management costs are lowered.
Description
Technical field
The present invention relates to data processing equipment and the method for the identical AIS message of a kind of filtering, belong to the data processing field of boats and ships message.
Background technology
Ship automatic identification system (Automatic Identification System, be called for short AIS) be the boats and ships and the base station broadcasts system that are operated in very high frequency(VHF) (VHF) marine cellular band, be promote navigation safety, improve the advanced tools of the shipping traffic efficiency of management.AIS is a kind of VHF radio set, and the ship informations such as such as user identification code (MMSI), accommodation longitude and latitude, course, the speed of a ship or plane can be received and dispatched mutually by the AIS of prescribed form (i.e. AIS message) with other boats and ships and base station by it.AIS can make boats and ships and base station " see " operation conditions of the boats and ships, base station, navigation mark etc. being equipped with AIS over the display, thus improves waterborne traffic context-aware and the function for monitoring of boats and ships.
The distance sent and received information of AIS equipment is limited, about 30 ~ 50 nautical miles, and therefore, in order to receive the watercraft AIS message in monitoring range with not omitting, the distance between base station can be less than the sending/receiving distance of AIS equipment.As shown in Figure 1, the AIS message that an AIS building berth sends, probably received by two or more AIS base station (being A, AIS base station, AIS base station B, AIS base station C in figure), form the information containing identical AIS message, data center is uploaded to by network interface, after data processing equipment, upload stored in information storing device or superior data center.These are containing the information of identical AIS message, as long as in fact preserve or upload one, other are all redundant informations.
Because the ships quantity equipping AIS is a lot, and constantly all in transmission AIS message, the accumulation throughout the year of these redundant informations can increase the weight of to store, the cost of transmission and management information, therefore needs properly to solve.
Summary of the invention
The object of the invention is to affect storage, transmission and the problem of management information cost to solve factor data redundancy, providing a kind of and reducing data redundancy, reduce store, the data processing equipment of transmission AIS message identical with the filtering of management information cost and method.
In order to achieve the above object, the invention provides the data processing equipment of the identical AIS message of a kind of filtering, comprise information I/O interface, it is characterized in that, also comprise message processing module and information storing device, described message processing module is connected with information I/O interface and information storing device, message processing module comprises identical AIS message filtering module, message processing module is proceeded to after information I/O interface information, message processing module is judged and is found by identical AIS message filtering module and discard the information containing identical AIS message, by the information after process stored in information storing device.
Preferably, described identical AIS message filtering module comprises information content comparison module and message buffer queue administration module, and information content comparison module is connected with message buffer queue administration module.
Preferably, described identical AIS message filtering module also comprises discard information queue management module, and discard information queue management module is connected with information content comparison module.
A data processing method for the identical AIS message of filtering, is characterized in that, comprise the following steps:
Step one, compare carrying out data containing the AIS message in the information of AIS message with the AIS message of the information in message buffer queue, if not identical, the information then this being contained AIS message exports stored in information storing device or by information I/O interface, and bring step 2 into and carry out message buffer queue management processing, otherwise this information containing AIS message discarded;
Step 2, whether discriminant information buffer queue is filled with, if be not filled with, then tail of the queue stored in bring into containing the information of AIS message; If be filled with, then delete at first stored in the information being head of the queue in queue, then at tail of the queue stored in the information containing AIS message of bringing into.
Preferably, in described step one the discarded information containing AIS message operation after, differentiate whether discard information queue is filled with, if be not filled with, then at tail of the queue stored in the discarded information containing AIS message; If be filled with, then delete at first stored in the information being head of the queue in queue, then at tail of the queue stored in the discarded information containing AIS message.
Preferably, the described information containing AIS message comprises time mark when receiving this AIS message; Compare for the time mark of the information in the time mark contained in the information of AIS message and user identification code and message buffer queue and user identification code are compared by carrying out data containing the AIS message in the information of AIS message and the AIS message of the information in message buffer queue in described step one, if life period mark comparative result is in an AIS slot time and the identical information of user identification code, the then discarded information containing AIS message in message buffer queue; Otherwise will export stored in information storing device or by information I/O interface containing the information of AIS message, and bring described step 2 into and carry out message buffer queue management processing.
Preferably, compare for the AIS message true form containing the AIS message true form in the information of AIS message and the information in message buffer queue is compared by carrying out data containing the AIS message in the information of AIS message and the AIS message of the information in message buffer queue in described step one, both can whole AIS message true form, also the crucial true form of AIS message can only be compared, if both AIS message true forms are identical, then the discarded information containing AIS message; Otherwise will export stored in information storing device or by information I/O interface containing the information of AIS message, and bring described step 2 into and carry out message buffer queue management processing.
Preferably, described AIS message true form can replace with AIS source codec, compares the message segment data of the message identifier in AIS source codec, user identification code, accommodation longitude and latitude.
The invention provides data processing equipment and the method for the identical AIS message of filtering, by the information containing AIS message, compare by carrying out data with the information containing AIS message inputted, find and discard redundancy containing the information of identical AIS message, effectively can reduce storages, transmit and the cost of management information.The present invention also proposes arrange and operate a certain amount of discard information buffer queue, all information containing AIS message received with equipment in certain hour length for future reference, the filtering efficiency of AIS message identical with calculating for future reference.
Accompanying drawing explanation
Fig. 1 is AIS building berth, AIS base station and data center operations schematic diagram;
Fig. 2 is the composition schematic diagram of the data processing equipment of the identical AIS message of filtering of the present invention;
Fig. 3 is the process flow diagram of the data processing method of the identical AIS message of filtering of the present invention.
Embodiment
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Embodiment 1
Following examples are available to those of ordinary skill in the art to realize and use of the present invention, but and be not used to limit the present invention, any amendment not departing from the spirit and scope of the present invention and do, is still included in scope of patent protection of the present invention.What protection scope of the present invention defined with claims is as the criterion.
As shown in Figure 2, be the composition schematic diagram of the data processing equipment of the identical AIS message of filtering of the present invention.The data processing equipment of the identical AIS message of a kind of filtering of the present invention, comprise information I/O interface, message processing module and information storing device, message processing module is connected with information I/O interface and information storing device; Message processing module comprises identical AIS message filtering module, and identical AIS message filtering module comprises information content comparison module, message buffer queue administration module and discard information queue management module, described information content comparison module is connected with message buffer queue administration module and discard information queue management module.
The present invention is generally used in the data center connecting multiple AIS base station, wherein information I/O interface normally network interface (as shown in Figure 1), information storing device is harddisk memory normally, message processing module comprises identical AIS message filtering module and information content comparison module wherein, message buffer queue administration module and discard information queue management module, and one of their implementation method writes computer program to realize.Information containing AIS message is formed when receiving the AIS message that AIS building berth sends by AIS base station, and normally standard statement, uploads to equipment of the present invention by public network or dedicated network.
As shown in Figure 3, be the process flow diagram of the data processing method of the identical AIS message of filtering of the present invention, write to the computer program of the data processing equipment of filtering identical AIS message and a reference is provided.Details are as follows for the data processing method of the identical AIS message of filtering of the present invention:
Message processing module of the present invention selects to need the information (hereinafter referred to as information A) of filtering identical AIS message to bring information content comparison module in identical AIS message filtering module into.Information content comparison module compares carrying out data containing the AIS message in the information A of AIS message with the AIS message of the information in message buffer queue.Here data more both can directly adopt AIS message true form to compare, and also by AIS source codec, can compare message segment data such as message identifier, user identification code (MMSI), accommodation longitudes and latitudes; Both can compare the total data of AIS message, also only can compare the critical data segment of AIS message.If the AIS message in information A is not identical with the AIS message of the information in message buffer queue, descriptive information A is not redundant information, then by information A stored in information storing device, if also have higher level data center in system, then exported as desired, by network interface and uploaded, then carry it into message buffer queue administration module and carry out subsequent processes.If otherwise comparative result is identical, descriptive information A is redundant information, and the information containing identical AIS message has been deposited or uploaded, then abandoned by information A, and information A is brought into discard information queue management module and carry out subsequent processes.
The data of information content comparison module relatively can also use another mode.AIS base station receives AIS message that AIS building berth sends when forming the information containing AIS message, can add the time mark receiving the moment in the information.A kind of mode of time mark or can be added AIS timeslot number and forms by AIS base station system time.Because AIS base station system time is usually by the GPS calibration time, time mark when therefore AIS base station receives the AIS message that same AIS building berth sends is basically identical: represent if time mark adds AIS timeslot number by AIS base station system time, then should be consistent; If represented with millisecond by AIS base station system time, then may there are some errors, but can not more than an AIS slot time (about 26 milliseconds).Time mark locality specific and data bits is less in containing the information of AIS message.Therefore, in order to data compare operation is simply rapid, first the time mark of the information in the time mark comprised in information A and message buffer queue can compare by information content comparison module, if identical or within the scope of certain error, such as, in 10 milliseconds, descriptive information A is likely redundant information.And then compare user identification code (MMSI) the message segment data of these two information further, if identical, this AIS message contained by two information can be estimated identical, namely information A is redundant information, then abandoned, and carry it into discard information queue management module and carry out subsequent processes.If otherwise to can not find in message buffer queue with information A time mark comparative result within the scope of certain error and the identical information of user identification code (MMSI), then descriptive information A is not redundant information, then by information A deposit or upload, and bring message buffer queue administration module into and carry out subsequent processes.
Message buffer queue administration module, the information mainly producing and keep a certain amount of up-to-date deposit or upload, is supplied to information content comparison module and carries out data as redundant information sample and compare.Information first in first out in message buffer queue, its typical operation is, whether discriminant information buffer queue is filled with, if be not filled with, then tail of the queue stored in bring into containing the information of AIS message; If be filled with, then delete at first stored in the information being head of the queue in queue, then at tail of the queue stored in the information containing AIS message of bringing into.
The data processing equipment of the identical AIS message of filtering of the present invention also comprises discard information queue management module.Information content comparison module finds and the redundant information of discarding, discard information queue management module can be brought into process, to produce and to keep a certain amount of up-to-date discarded information, for all information containing AIS message that equipment in system nearest certain hour length for future reference receives, namely to deposit or the information uploaded adds information in discard information queue; Also the filtering efficiency of the identical AIS message of calculating for future reference can be used for.Information first in first out in discard information queue, its typical operation is, differentiates whether discard information queue is filled with, if be not filled with, then at tail of the queue stored in the discarded information containing AIS message; If be filled with, then delete at first stored in the information being head of the queue in queue, then at tail of the queue stored in the discarded information containing AIS message.
Claims (4)
1. the data processing equipment of the identical AIS message of filtering, comprise information I/O interface, it is characterized in that, also comprise message processing module and information storing device, described message processing module is connected with information I/O interface and information storing device, message processing module comprises identical AIS message filtering module, message processing module is proceeded to after information I/O interface information, message processing module is judged and is found by identical AIS message filtering module and discard the information containing identical AIS message, by the information after process stored in information storing device;
Described identical AIS message filtering module comprises information content comparison module and message buffer queue administration module, and information content comparison module is connected with message buffer queue administration module;
Described identical AIS message filtering module also comprises discard information queue management module, and discard information queue management module is connected with information content comparison module;
Described information content comparison module comprises and will carry out time mark containing the information of AIS message with the information in message buffer queue and user identification code compares, by time mark comparative result in an AIS slot time and the identical reception information of user identification code, send into the process of discard information queue management module, other reception information are stored in information storing device and send into the process of message buffer queue administration module; Described time mark is added AIS timeslot number by the AIS base station system time comprised when receiving AIS message or AIS base station system time and is formed.
2. a data processing method for the identical AIS message of filtering, is characterized in that, comprise the following steps:
Step one, compare carrying out data containing the AIS message in the information of AIS message with the AIS message of the information in message buffer queue, if not identical, the information then this being contained AIS message exports stored in information storing device or by information I/O interface, and bring step 2 into and carry out message buffer queue management processing, otherwise this information containing AIS message discarded;
Step 2, whether discriminant information buffer queue is filled with, if be not filled with, then tail of the queue stored in bring into containing the information of AIS message; If be filled with, then delete at first stored in the information being head of the queue in queue, then at tail of the queue stored in the information containing AIS message of bringing into;
In described step one the discarded information containing AIS message operation after, differentiate whether discard information queue is filled with, if be not filled with, then at tail of the queue stored in the discarded information containing AIS message; If be filled with, then delete at first stored in the information being head of the queue in queue, then at tail of the queue stored in the discarded information containing AIS message;
The described information containing AIS message comprises time mark when receiving this AIS message; Compare for the time mark of the information in the time mark contained in the information of AIS message and user identification code and message buffer queue and user identification code are compared by carrying out data containing the AIS message in the information of AIS message and the AIS message of the information in message buffer queue in described step one, if life period mark comparative result is in an AIS slot time and the identical information of user identification code, the then discarded information containing AIS message in message buffer queue; Otherwise will export stored in information storing device or by information I/O interface containing the information of AIS message, and bring described step 2 into and carry out message buffer queue management processing.
3. the data processing method of the identical AIS message of a kind of filtering as claimed in claim 2, it is characterized in that, compare for the AIS message true form containing the AIS message true form in the information of AIS message and the information in message buffer queue is compared by carrying out data containing the AIS message in the information of AIS message and the AIS message of the information in message buffer queue in described step one, whole AIS message true form, or only compare the crucial true form of AIS message, if both AIS message true forms are identical, then the discarded information containing AIS message; Otherwise will export stored in information storing device or by information I/O interface containing the information of AIS message, and bring described step 2 into and carry out message buffer queue management processing.
4. the data processing method of the identical AIS message of a kind of filtering as claimed in claim 3, it is characterized in that, described AIS message true form AIS source codec replaces, and compares the message segment data of the message identifier in AIS source codec, user identification code, accommodation longitude and latitude.
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| CN105262603B (en) * | 2015-09-16 | 2018-07-06 | 上海海事大学 | VHF communication device drives AIS equipment sends out the device of automatic identification message |
| CN110879804A (en) * | 2019-11-20 | 2020-03-13 | 珠海格力电器股份有限公司 | Streaming positioning data processing method, system, processing device and storage medium |
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| CN102034367A (en) * | 2010-12-24 | 2011-04-27 | 吴安新 | System for identifying and positioning ships, and identification and positioning method thereof |
| CN201936459U (en) * | 2010-12-24 | 2011-08-17 | 吴安新 | Ship recognition and locating system |
| CN102263654A (en) * | 2010-05-26 | 2011-11-30 | 杭州华三通信技术有限公司 | In-maintenance domain multilayer cross-level alarm suppression method, system and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102263654A (en) * | 2010-05-26 | 2011-11-30 | 杭州华三通信技术有限公司 | In-maintenance domain multilayer cross-level alarm suppression method, system and device |
| CN102034367A (en) * | 2010-12-24 | 2011-04-27 | 吴安新 | System for identifying and positioning ships, and identification and positioning method thereof |
| CN201936459U (en) * | 2010-12-24 | 2011-08-17 | 吴安新 | Ship recognition and locating system |
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