CN101923624B - RFID (Radio Frequency Identification Devices) event processing method based on channel flow - Google Patents
RFID (Radio Frequency Identification Devices) event processing method based on channel flow Download PDFInfo
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Abstract
The invention relates to an RFID (Radio Frequency Identification Devices) information processing method based on a channel flow, which comprises a step S2 of processing a tag message to produce a tag event for supplying an upper level application program. The process for processing the tag message to produce the tag event for supplying the upper level application program comprises the following steps of: defining processors for realizing different processing functions before processing the tag message; writing a calling sequence of all processors in a configuration table of an event engine; during processing, acquiring the tag message, and putting the acquired message into a defined channel; and calling each processor according to the sequence set in the configuration table of the event engine, and processing the information in the channel in a channel flow mode. The invention enhances the flexibility of the event processing procedure, dynamically enhances and expands the functions ofthe processors, avoids the rigescence and the low efficiency of process configuration and improves the response and processing capabilities of the system to bottom-level events.
Description
Technical field
The present invention relates to REID, or rather, what the present invention relates to is in a kind of RFID application system, is used for the data processing method of the RFID middleware between rfid interrogator and the RFID application program.
Background technology
When obtaining label information, can once obtain label data in batches with rfid interrogator (Reader) usually.Limit by the principle of work of RF identification; Numerous in number of labels; And by a plurality of read write line information of carrying out obtain and/or in real time the monitoring the application scenario; For example under the situation such as stock, logistics management, the label data that read write line obtains often have data volume huge with have two characteristics of a large amount of redundant informations.Therefore these label datas often need pass through after certain processing and the filtration, could inscribe the application program of supplying with the upper strata and carry out information processing.The process of the information of supplying with application program is handled and generated to label data, accomplish by the RFID middleware usually.
The RFID middleware is a kind of message-oriented middleware, and information is the form with message, is sent to another or a plurality of program from a program.Information can transmit with asynchronous mode, so conveyer needn't await a response.The function that message-oriented middleware comprises is not only transmission information, also must comprise interpret data, security, data broadcasting, mistake recovery, fixer network resource, the priority ranking of finding out the path, message and the requirement that meet cost and the services such as debugging tool of extension.
The effect of RFID middleware is mainly reflected in three aspects:
(1) control RFID read-write equipment is worked according to predetermined mode, guarantees matching coordinative between the different read-write equipments, shields the otherness between each read write line.
(2) according to certain rule-based filtering data, screen out most redundant datas, send real active data to the background information system.
(3) reliable communication between assurance read write line and the enterprise-level distribution applications system platform.
The problem of the maximum that the RFID middleware faces is: the data of the flood tide that Treated Base is reported up how.For example in a medium retail chain, the label event quantity that scanned in one day can reach 5,000,000,000.The challenge that brings the RFID middleware to face thus is how to go out valuable information in extracting data of flood tide like this.So filtering data how, sieve place redundant data, sending real active data to the background information system is RFID middleware important effect.
The EPCGlobal of international organization has given definition and standardization explanation to association area functions of components such as RFID technology and RFID middlewares, and the standard relevant with the electronic product code data processing is ALE (ApplicationLevel Event) standard.It has stipulated the flow process of electronic product code data processing and the function of processing unit, but does not provide the related content that processing unit design realizes etc.In this simultaneously, during domestic standard about RFID technology and RFID middleware Technology is also actively being formulated.
The major function of RFID event handling layer is that original RFID data are filtered, divided into groups and pack, and it is in important status in the RFID centre.
In the RFID middleware product of the maturation of having come out at present, all comprise RFID event handling part.But itself otherwise be that function is thin, filtering rule is simple, lacks the definition and the processing power of complicated event; Be based on core product or The Application of Technology that the developer researches and develops, too big dependence and less extendability are arranged; Simple these models and the method used can not solve the event handling problem that is faced in the complicated RFID application effectively.Based on present Research and the RFID data characteristic of RFID, how in real time the RFID data of flood tide to be handled, how fully excavating the useful information that the RFID data are comprised becomes the major issue of demanding urgently studying.
Summary of the invention
For under the prerequisite of the framework that does not change existing system, overcome above-mentioned shortcoming, solve the problem of a large amount of RFID data being carried out dynamic process, the present invention proposes a kind of RFID information processing method based on channel flow.
The present invention is based on the RFID information processing method of channel flow; Comprise tag message is handled to generate the step S2 of the label event of supplying with upper level applications; It is characterized in that the process that said tag message is handled to generate the label event of supplying with upper level applications comprises:
Before tag message was handled: definition realized the processor of different processing functions; The allocation list that order writes an event engine that calls with said each processor;
In the processing procedure: obtain tag message, and make the information of obtaining be positioned at a pipeline of definition;
, ducted information is handled according to set each processor of sequence call of allocation list by said event engine with the mode of channel flow.
Wherein, said method also is included in before the said step S2, obtains label information, label information is handled the step S1 that generates tag message from rfid interrogator; And after step S2, label event is delivered to the step S3 of application program.
Preferably, said step S1 process comprises:
S110 monitors by monitoring module pair and the rfid interrogator network port that is connected of communicating by letter;
S120 when the monitoring module receives the link of read write line, generates corresponding connector object, and carries out next step S130; Otherwise attonity;
S130, said connector receives label information from said read write line, and said label information is delivered to a message pump;
S140, said message pump produces two threads, and a thread will be put into a message buffer from the label information of connector; Another thread is delivered to message handling device with the label information in the message buffer;
S150, said message handling device carries out primary treatment to label information, and the information after the said afterwards processing is encapsulated as a notify object with file structure model again, and said notify object is called tag message.
Preferably, said step S3 process comprises:
Generate two threads by a label event pump; One of them thread is put into a label event buffer zone with the label event that step S2 produces; Another thread takes out label event and according to its type, delivers to corresponding RFID application program via event sniffer from said label event buffer zone.
Beneficial effect of the present invention is, can support the dynamic-configuration for the RFID event handling, improves RFID event handling ability.Can flexibly, effectively handle the magnanimity information that comes from read write line based on the RFID event-handling method of channel flow, to its filter fast, accurately, packing and division operation, and effective support is provided for the generation of advanced event and upper layer application.Owing to adopted the event handling model of channel flow, and used configuration file that all kinds of event handlers are loaded, come to carry out more effective and configuration flexibly to event handling, also interface is provided for the expansion of event handling.And method of the present invention is classified processor and abstract interface definition, and concrete processor is realized the abstraction interface of respective classes according to affiliated classification.The processor that needs in the system to use is carried out detailed configuration by processing sequence in configuration file.Can be when system moves according to configuration file order loading processing device; And call each processor with the mode of channel flow; With the RFID incident of corresponding processor sequential processes bottom input, the next processor that the incident after each processor processes will flow in the configuration file carries out relevant treatment.If want to increase or delete corresponding processor, only need to revise configuration file, let configuration file increase or reduce corresponding processor configuration get final product.Thereby solved the dynamic process problem for the RFID event handling effectively, the processor that needs through realization also disposes accordingly, can further handle for the RFID incident, and need not change the framework of existing system.
Therefore, can overcome that existing model and methodological function property are weak, dependence strong, be difficult for the characteristics using and expand, provide that a kind of uses is more convenient, function is more powerful, the configuration is more flexible, move RFID event-handling method more efficiently.Through using configurable channel flow event handling pattern, strengthened the dirigibility of event handler procedure, and its function can be strengthened and expand dynamically, avoided ossifing and poor efficiency of flow process configuration, improved response and the processing power of system to the bottom incident.
Description of drawings
Fig. 1 is the general hierarchical structure of rfid system;
Fig. 2 is the schematic flow sheet of RFID data processing;
Fig. 3 is a data flow diagram in the pipeline of the present invention;
Fig. 4 is an embodiment schematic flow sheet that the present invention is based on the RFID information processing method of channel flow;
Fig. 5 be in the inventive method event handler to the processing procedure synoptic diagram of incident.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention and various characteristics are carried out detailed explanation.
Fig. 1 is the structural representation of a RFID application system, and Fig. 2 is the schematic flow sheet of RFID data processing.Generally speaking to handling from the information of RFID label also through 3 levels.First; By the rfid interrogator reading tag data; Each read write line can read many strip labels data, by read write line label data is delivered to the main frame of networking with it afterwards, carries out the data rough handling by the RFID middleware; Said rough handling fundamental purpose is label data to be carried out the format of standard; After after preliminary filtration and the packing etc., make it to become data type that is suitable for the upper level applications processing and the deal with data amount of simplifying upper level applications, and it is passed to upper level applications.
In this process, the information of label has experienced by label data to tag message again to label event, generates the data conversion flow process of API (application programming interfaces) incoming event at last, and packed and filter in this process.
In the present invention, label data is defined as the raw data that each RFID label by the read write line collection sends, and its different bags according to read write line and label are breathed out has information such as different data layouts and data item.Tag message is defined as the notify object with file structure model with the rough handling of RFID middleware, and this object has unified data describing mode and and structure.Label event, the state of expression tag message in processing procedures at different levels, it is to have semantic event context structure, also abbreviates incident as.Thereby, tag message with become the API incoming event also to can be considered label event.
Method of the present invention is done bright specifically below in conjunction with Fig. 3 and Fig. 4.Wherein, Fig. 3 is a data flow diagram in the pipeline of the present invention; Fig. 4 is an embodiment schematic flow sheet that the present invention is based on the RFID information processing method of channel flow.Here so-called channel flow a kind of form that to be computing machine handle data, " pipeline " are the structures of an abstract deal with data, for example all relate to the channel flow processing what machine words such as C language and java called the turn.
According to the embodiment of Fig. 4, the RFID information processing method based on channel flow of the present invention comprises: obtain label information, label information handled the step S1 that generates tag message from rfid interrogator; Tag message is handled to generate the step S2 of the label event of supplying with upper level applications; And after step S2, label event is delivered to the step S3 of application program.Wherein step S1 and step S3 all have multiple implementation in the prior art; The present invention below is merely a preferred embodiments with the implementation method of S1 that mentions and S3 and is not construed as limiting, and any method of delivering to application program with the method for existing generation tag message and with label event combines with step S2 of the present invention and the technical scheme that constitutes all belongs to protection scope of the present invention.Any method that RFID information is handled that comprises step S2 of the present invention also will belong to protection scope of the present invention.
Referring to Fig. 4, said step S1 process to label information processing generation tag message comprises:
S110 monitors by monitoring module pair and the rfid interrogator network port that is connected of communicating by letter; Here monitor module and can have a plurality of listening points, for example each listening point is monitored a port numbers;
S120 when the monitoring module receives the link of read write line, generates corresponding connector object, and carries out next step S130; Otherwise attonity;
S130, said connector receives label information from said read write line, and said label information is delivered to a message pump;
S140, said message pump produces two threads, and a thread will be put into a message buffer from the label information of connector; Another thread is delivered to message handling device with the label information in the message buffer;
S150, said message handling device carries out primary treatment to label information, and the information after the said afterwards processing is encapsulated as a notify object with file structure model again, and said notify object is called tag message.Wherein, the message of from the message buffer, taking out is plain text format, and the function of message handling device is carried out processed to plain text exactly, for example decompresses and deciphers.After all processing to message finish, again result is encapsulated into a notify object with DOM structure, supply step S2 to use, for example in the present embodiment, send to report processor.These are all accomplished in " pipeline ".
Afterwards, tag message is being handled to generate the step S2 of the label event of supplying with upper level applications, process comprises:
Before tag message was handled: definition realized the processor of different processing functions; The allocation list that order writes an event engine that calls with said each processor; Also can comprise in the said allocation list among the step S1 with S3 in the configuration of the message handling device that relates to and label event pump etc., and can dynamically change, call flexibly realizing.
In the processing procedure: obtain tag message, and make the information of obtaining be positioned at a pipeline for its definition; , ducted information is handled according to set each processor of sequence call of allocation list by said event engine with the mode of channel flow.
For example, the processor of described realization different processing functions can comprise a plurality of report processors and event handler.In this example, introduce a report processor notify object is added signing messages, like need signature object is carried out more multiprocessing and can dynamically add new report processor.Afterwards, the new notify object incident of carrying out that Report Builder generates is peeled off, and, then the incident of peeling off is sent to event processing module for each incident generates an event context by event engine." peel off " to notify object and carry out, promptly from notify object, obtain elementary event.Event processing module calls the events corresponding processor according to event type, and event handler is mainly processed incoming event, and fresh information is put into the event context of incident, keeps supplying the advanced event that layer is used with generation.For example, event processing module is a Manager, and event handler is Handler.Event processing module mainly is that Distribution Events is given the events corresponding processor.
The said step S3 process that label event is delivered to application program comprises:
Generate two threads by a label event pump; One of them thread is put into a label event buffer zone with the label event that step S2 produces; Another thread takes out label event and according to its type, delivers to corresponding RFID application program via event sniffer from said label event buffer zone.
Wherein, all configuration informations of the present invention are all stored with the XML document form, represent dissimilar processors with different nodes, through being provided with of nodal community being disposed the concrete realization object and the respective attributes value thereof of this processor.Precedence relationship in configuration file between the different processor must be maintained, and for example message handling device must state that before event handler the plain text information that at first obtains must be passed through some message processor processes, generated the text with XML form.From then on event handler extracts events corresponding information again in the text and handles.Equally; Order between a plurality of processors of same type must also be maintained, for example in the message processing procedure, if read write line is encrypted earlier text; Compress again, in the message handling device configuration, text is carried out must guaranteeing that the inverse process of said process is able to carry out when original text recovers.
Fig. 5 be in the inventive method processor to the processing procedure synoptic diagram of incident.Flow model be bottom to the basic RFID incident of upper strata transmission.Have several processors in the whole event transaction module, processor is responsible for basic RFID incident is handled, and submits to upper layer application to generate complicated event.Each processor be input as an incident, output also is an incident, outgoing event be through after the processor processes to the processing and packing of incoming event.In the treatment project of each processor, after the event information of input extracted, handles and process, generation is directed to the fresh information of this incident, and fresh information is put into the corresponding event context of this event object by the events corresponding processor.Through after ducted all processors, have semantic advanced event context object with forming one, this object is passed to upper layer application as advanced event.
In the event handling model, realized the incident filtering treater, realize filtering function to incident, promptly keep the incident that suits the requirements, go out not meet the incident that needs.Can control incident total amount, with the load of mitigation system to the upper strata report.The not restriction of event handler number can dynamically load in configuration file and unload, to reach the effect of dynamic-configuration according to demand among Fig. 3 or Fig. 5.For example, event handler is configurable again: packet handler, semantic processor, filtering treater and log processor etc.
The corresponding event context of each incident is designed to a Hash table (key-value pair structure); In the whole event transaction module; Each processor is exactly in event context, to insert new key-value pair in the middle of the processing procedure, simple event is encapsulated the formation complicated event.An example of event context structure is seen shown in the table one.The key assignments of Hash table can repeat, and the key assignments of repetition should correspondingly be override.For example processor one has upwards hereinafter inserted a new key assignments, and processor two has inserted a key assignments of the same name again, and this moment, system thought that the key-value pair that processor one inserts finishes dealing with the old key-value pair before the key assignments of the same name that processor two inserts can replace.
Table one event context Hash table
| The context key name is claimed | Type | Explanation |
| TagID | String | Label E PC sign indicating number |
| ReaderID | String | Read write line ID |
| SourceName | String | Source name |
| SourceProtocol | String | The agreement that adopt in the source |
| SourceFrequency | String | The frequency that adopt in the source |
| TagType | String | Tag types |
| EventType | String | Event type equals the primitive event type |
| RawReader | ReaderType | Original read write line |
| RawEventType | String | The original tag event type |
| LogicalReader | String | Logic read write line title equals original read write line title |
Lifting an instantiation below describes the entire process process of the data from label of the present invention.One combines the processing procedure of concrete data following:
1. read write line detects label " 09204F0004B00000 ".
2. produce message by the message pump, form is following:
Observation:
WrapperName:null
ReadPointName:Shelf1
Timestamp:Wed?Apr?2916:59:22CST?2009
Tags:
9204F0004B00000
Successful:true
3. message handling device is handled origination message, as: (concrete form can be configured according to actual needs) such as compression, encryptions.
4. generate the notify object of DOM structure, for example form is following:
<?xml?version＝″1.0″encoding＝″UTF-8″standalone＝″yes″?>
<ns2:notification?xmlns:ns2＝″urn:epcglobal:rp:xsd:1″>
<id>2</id>
<reader>
<readerEPC>9204F0004B00000</readerEPC>
<readerName>virtual?reader2</readerName>
<readerHandle>100</readerHandle>
<readerRole>unknown</readerRole>
</reader>
<notifyTriggerName>NotificationTrigger</notifyTriggerName>
<notifyChannelName>NotificationChannel</notifyChannelName>
<readReport>
<sourceReport>
<sourceInfo>
<sourceName>ReaderProtocol:Default</sourceName>
<sourceFrequency>0</sourceFrequency>
<sourceProtocol>not?supported</sourceProtocol>
</sourceInfo>
<tag>
<tagID>09204F0004B00000</tagID>
<tagIDAsPureURI>urn:epc:raw:60.x9204F0004B00000</tagIDAsPureURI>
<tagIDAsTagURI>urn:epc:raw:60.x9204F0004B00000</tagIDAsTagURI>
<tagType>not?supported</tagTyPe>
<tagEvent>
<eventType>evObserved</eventType>
<eventTriggers>
<trigger>ReadTrigger</trigger>
</eventTriggers>
<time>
<eventTimeTick>1240995564343</eventTimeTick>
<eventTimeUTC>2009-04-29T16:59:24.343+08:00</eventTimeUTC>
</time>
</tagEvent>
</tag>
</sourceReport>
</readReport>
</ns2:notification>
5. each report processor is handled notify object, generates new notify object.
6. the new notice report incident of carrying out is peeled off; Extract like Observed incident that will be wherein, Glimpsed incident etc.; And for each incident generates an event context, comprising incident relevant informations such as event type, incident generation incident and incident scenes.
7. give the different events processor according to the different events type and handle, and the report dependent event, as:
(virtual?reader2)urn:epc:raw:60.x9204F0004B00000 evGlimpsed
(virtual?reader2)urn:epc:raw:60.x9204F0004B00000 evObserved
To sum up; The present invention has designed the event handling model based on channel flow; And can use of the connection of XML configuration file to read write line, read setting a little, and various types of messages processor, report processor, event handler load; Thereby carry out more effective and configuration flexibly to event handling, also interface is provided for the expansion of event handling.Wherein, The design of processor and realization can be with (for example locating the device classification; Be divided into message handling device, report processor and event handler) and and corresponding abstract interface definition is provided, the concrete processor of realizing is realized the abstraction interface of respective classes according to affiliated classification.The processor that needs in the system to use is carried out detailed configuration by processing sequence in configuration file.Can be when system moves according to configuration file order loading processing device; And call each processor with the mode of channel flow; With the RFID incident of corresponding processor sequential processes bottom input, the next processor that the incident after each processor processes will flow in the configuration file carries out relevant treatment.If want to change the connection or the increase of read write line or delete corresponding processor, only need to revise configuration file, revise corresponding connection attribute or let configuration file increase or reduce corresponding processor configuration getting final product.This invention has solved the dynamic process problem for the RFID event handling effectively, and the processor that needs through realization also disposes accordingly, can further handle for the RFID incident, and need not change the framework of existing system.
The above description of this invention is illustrative, and nonrestrictive, and those skilled in the art is understood, and within spirit that claim limits and scope, can carry out many modifications, variation or equivalence to it, but they will fall in protection scope of the present invention all.
Claims (6)
1. the RFID information processing method based on channel flow is characterized in that, comprises the steps:
Step S1: obtain label information, label information is handled the generation tag message from rfid interrogator;
Step S2: tag message is handled the label event of supplying with upper level applications to generate, and the said step S2 that tag message is handled to generate the label event of supplying with upper level applications comprises:
Before tag message was handled: definition realized the processor of different processing functions; The allocation list that order writes an event engine that calls with each processor;
In the processing procedure: obtain tag message, and make the tag message of obtaining be positioned at a pipeline of definition;
, ducted message is handled according to set each processor of sequence call of allocation list by said event engine with the mode of channel flow;
Step S3: label event is delivered to upper level applications, and said step S3 comprises:
Generate two threads by a label event pump; One of them thread is put into a label event buffer zone with the label event that step S2 produces; Another thread takes out label event and according to its type, delivers to corresponding upper level applications via event sniffer from said label event buffer zone.
2. the RFID information processing method based on channel flow according to claim 1 is characterized in that said step S1 comprises:
S110 monitors by monitoring module pair and the rfid interrogator network port that is connected of communicating by letter;
S120 when the monitoring module receives the link of read write line, generates corresponding connector object, and carries out next step S130; Otherwise attonity;
S130, said connector object receives label information from said read write line, and said label information is delivered to a message pump;
S140, said message pump produces two threads, and a thread will be put into a message buffer from the label information of connector object; Another thread is delivered to message handling device with the label information in the message buffer;
S150, said message handling device carries out primary treatment to label information, and the information after handling afterwards is encapsulated as a notify object with file structure model again, and said notify object is a tag message.
3. the RFID information processing method based on channel flow according to claim 2; It is characterized in that; The processor that defines among the said step S2 comprises report processor and event handler, the object that is input as a file structure model of each processor, and output also is an object with file structure model; Said object with file structure model is designated as incident, and said ducted message is treated in incident adds or peel off corresponding upper and lower literary composition.
4. the RFID information processing method based on channel flow according to claim 3 is characterized in that, whether said each message handling device, report processor and event handler are called and call order and dynamically confirmed by said allocation list.
5. the RFID information processing method based on channel flow according to claim 3 is characterized in that, the context of said incident is a Hash table.
6. the RFID information processing method based on channel flow according to claim 1; It is characterized in that; Said allocation list is stored with the XML document form; And represent different processors with different nodes, through the concrete realization object and the respective attributes thereof that are provided with configuration processor to nodal community.
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