CN102693434A - Communication apparatus and method for interface layer of radio frequency identification device - Google Patents

Abstract

The invention discloses a communication device and method of an RFID device interface layer, wherein the device includes: a connection maintenance pool for storing all connections to be established and information about each connection; a device connector for initiating a connection to the RFID device The connection request, after detecting the response message returned by the RFID device, establishes the connection requested by the connection request, seizes the resources of the message processor, and registers the data processing event to the message processor; the connection receiver is used to monitor the connection request event, after receiving the connection request event, establish the connection requested by the connection request event, seize the resources of the message processor, and register the data processing event to the message processor; the message processor is used to monitor the data processing event, After the data processing event, handle the data processing event. Through the present invention, the RFID device can be used as the client and the server at the same time, so as to meet the requirements of different scenarios.

Description

Communication device and method for interface layer of radio frequency identification equipment

technical field

The present invention relates to the field of communication, in particular to a communication device and method for an interface layer of a radio frequency identification device.

Background technique

With the rapid development of the Internet of Things, radio frequency identification (Radio Frequency Identification, referred to as RFID) technology has gradually entered various fields of people's daily work and life, and the performance requirements for the interface layer of application server equipment are also becoming increasingly strong. As we all know, in general network communication, the establishment of a network connection is usually initiated by the client, and the server only needs to monitor the corresponding port and respond to the connection request.

There are mainly two types of network communication schemes used in the current application server: one is to allocate a separate thread for each client connection to process it, this scheme is easy to implement, and when the number of connections is not large Good performance can be obtained, but because each client connection is assigned a thread separately, the RFID application server can only be used as a server or a client, but not both as a client and a server, and, in high concurrency Under normal circumstances, thread switching will consume a large amount of server resources, which seriously affects system performance; another solution is based on input/output (Input/Output, referred to as IO) multiplexing technology and Reactor mode, and a separate thread receives the connection event requests, and assign the received events to the thread pool for processing. Although this solution can make full use of server resources, the RFID application server can only serve as the server or client, and in the case of high concurrency, if Failure to process event requests in time will seriously affect the response time of the server, so its processing performance needs to be optimized.

In the application of RFID, according to the requirements of the Low-Level Reader Protocol (LLRP) protocol, the RFID device can act as a client to actively initiate a connection, or as a server to respond to a connection request initiated by an application. In order to meet the communication needs of the LLRP protocol, it is required that the RFID application can also serve as the client and the server at the same time. However, according to the current above two network communication schemes, the RFID device can only be used as the client or the server, but not at the same time. And the server, so it cannot meet the needs of different scenarios.

Contents of the invention

The main purpose of the present invention is to provide a communication device and method for an interface layer of a radio frequency identification device, so as to at least solve the above problems.

According to another aspect of the present invention, a radio frequency identification device interface layer communication device is provided, including:

The connection maintenance pool is used to store all the connections to be established and the information of each of the connections, and read the information of each of the connections to be established in sequence, and if the mode of the read connection is passive mode, trigger the connection The receiver, if the read mode of the connection is an active mode, then trigger the device connector; the device connector is used to initiate a connection request to the RFID device according to the read information of the connection. After the response message returned by the RFID device, establish the connection requested by the connection request, seize the resources of the message processor, and register the data processing event of the established connection to the message processor; the connection receives The device is used to monitor the connection request event, and after receiving the connection request event, establishes the connection requested by the connection request event, preempts the resource of the message processor, and registers the data processing event of the established connection in the A message processor; the message processor is configured to monitor the data processing event registered therein, and process the data processing event after monitoring the data processing event.

Further, the device connector includes: a connection initiation event listener, configured to detect a response message of the connection request, and after detecting the response message, trigger a connection initiation event processing pool; the connection initiation event processing The pool is configured to complete the establishment operation of the connection requested by the connection request, seize the resources of the message processor, and register the data processing event of the established connection to the message processor.

Further, the connection initiation event processing pool is further configured to update the information of the connection requested to be established by the connection request stored in the connection maintenance pool after the establishment operation of the connection requested by the connection request is completed.

Further, the connection receiver includes: a connection reception event listener, configured to listen to a predetermined port according to the read connection information, detect a connection request event from the port, and when a connection request event is detected, , triggering the connection reception processing pool; the connection reception processing pool is used to process the connection request event, establish the connection requested by the connection request event, seize the resource of the message processor, and establish the data of the connection Handle events registered to the message handler.

Further, the connection receiving processing pool is further configured to update the information of the connection requested to be established by the connection request stored in the connection maintenance pool after the connection requested by the connection request event is established.

Further, the message processor is configured to divide the data processing event into multiple sub-operations, and execute each of the sub-operations in sequence.

Further, the message processor includes: a data processing event listener, configured to monitor a data processing event registered to the message processor, and trigger a message processing scheduling module when the data processing event is detected; the The message processing scheduling module is configured to schedule one thread among the preset multiple threads to process the data processing event.

According to one aspect of the present invention, a communication method for an interface layer of a radio frequency identification device is provided, comprising: Step 1, reading information of a connection to be established stored in the connection maintenance pool, if the mode of the connection is an active mode , then execute step 2, if the connection mode is passive mode, execute step 3; step 2, the device connector initiates a connection request to the RFID device according to the connection information, and detects the response returned by the RFID device After the message, establish the connection, then seize the resources of the message processor, register the data processing event of the established connection to the message processor, and perform step 4; step 3, connect the receiver according to the information of the connection , listening to a predetermined port, after receiving a connection request event, establishing the connection requested by the connection request event, preempting the resources of the message processor, and registering the established data processing event of the connection to the message processor ; Step 4, the message processor monitors the data processing event registered in it, and processes the data processing event after monitoring the data processing event.

Further, after the device connector establishes the connection, the method further includes: the device connector updating information of the connection requested to be established by the connection request stored in the connection maintenance pool.

Further, after the connection receiver establishes the connection requested by the connection request event, the method further includes: the connection receiver updates the information stored in the connection maintenance pool of the connection requested by the connection request to be established information.

Further, the processing of the data processing event by the message processor includes: the message processor divides the data processing event into a plurality of sub-operations, calling one of the preset multiple threads to execute each sub-operation respectively in sequence. subroutine operation.

Further, the multiple sub-operations include: reading, parsing, encapsulating and distributing.

Through the present invention, in the RFID application server, a connection request is initiated and a connection request is received respectively through a device connector and a connection receiver, thereby solving the problem that the RFID device in the prior art can only be used as a client or a server, but not simultaneously as a client And server problems, and then optimize the network communication performance, to meet the needs of different scenarios.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a schematic structural diagram of a communication device of an RFID device interface layer according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a communication device of an RFID device interface layer according to a preferred embodiment of the present invention;

Fig. 3 is the flowchart of the communication method of the RFID equipment interface layer according to the embodiment of the present invention;

Fig. 4 is a schematic diagram of a connection establishment flow chart according to a mixed mode in a preferred embodiment of the present invention;

5 is a flow chart of a message processor performing data processing event processing according to an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a message processing four-stage pipeline according to a preferred embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

According to an embodiment of the present invention, a communication device of an RFID device interface layer is provided, and the device is located on the RFID application server side. Fig. 1 is a schematic structural diagram of a communication device of an RFID device interface layer according to an embodiment of the present invention, as shown in Fig. 1 , the device mainly includes: a connection maintenance pool 11, which is used to store all connections to be established and the information of each connection, and to read the information of each connection to be established in turn, and if the mode of the read connection is a passive mode, trigger Connect receiver 13, if the mode of the connection of reading is active mode, then trigger device connector 12; Device connector 12, be used for initiating the connection request to RFID device according to the information of the connection of reading, detect RFID device After returning the response message, establish the connection requested by the connection request, seize the resources of the message processor 14, and register the data processing event of the established connection to the message processor 14; the connection receiver 13 is used to monitor the connection request event, after receiving the connection request event, set up the connection requested by the connection request event, seize the resources of the message processor 14, and register the data processing event of the connection established to the message processor 14; the message processor 14 is used for Listen to the data processing events registered in it, and process the data processing events after listening to the data processing events.

Through the above-mentioned device provided by the embodiment of the present invention, by setting the device connector 12 and the connection receiver 13 on the RFID application server side, the connection request can be initiated and the connection request can be received respectively, so that the function of the RFID device as the client and the server at the same time can be realized . In addition, the above-mentioned device supports the connection establishment strategy of the hybrid link establishment mode of RFID equipment, manages it through a unified connection maintenance pool, and uses a unified message processor to process the connection. On the one hand, it ensures that devices with different communication modes can communicate with the application The connection is established, on the other hand, the connections of different modes can be maintained and processed in a unified manner, which reduces the development difficulty and complexity of the system for maintaining different modes of connections, and effectively improves the performance of the system.

In general, the connection maintenance pool 11 stores various connections to be established in different ways and the information of each connection. In the specific implementation manner of the embodiment of the present invention, the information of each connection can use the device number and link number as the connection Of course, other information can also be stored in the connection maintenance pool 11, for example, the socket handle (used to identify the connection) on the corresponding connection and the information of the corresponding RFID device (for example, a reader) can also be stored.

In a preferred implementation of the embodiment of the present invention, as shown in FIG. 2, the device connector 12 may include a connection initiation event listener 122 and a connection initiation event processing pool 124, wherein the connection initiation event listener 122 is used to detect the connection request response message, and after detecting the response message, trigger the connection initiation event processing pool 124; the connection initiation event processing pool 124 is used to complete the establishment operation of the connection requested by the connection request, and seize the resources of the message processor 14, and A data processing event of an established connection is registered to the message handler 14 .

In practical applications, after the device connector 12 initiates a connection, the connection initiation event listener 122 is responsible for monitoring the connection initiation event, and after the connection is successfully established, once the connection initiation event listener 122 detects the connection event, it will hand over the connection event to The connection initiates thread processing in the event processing pool 124 .

In a preferred implementation of the embodiment of the present invention, the connection initiation event processing pool 124 can also be used to update the connection request requested to be established stored in the connection maintenance pool 11 after the connection establishment operation requested by the connection request is completed. connection information. That is to update the state of the connection stored in the connection maintenance pool 11 as an established connection, and also store the relevant information of the connection (for example, the IP address of the RFID device, etc.) in the connection maintenance pool 11 .

In another preferred embodiment of the embodiment of the present invention, as shown in FIG. 2 , the connection receiver 13 may include a connection reception event listener 132 and a connection reception processing pool 134 . Wherein, the connection reception event listener 132 is used to monitor a predetermined port according to the connection information read by the connection maintenance pool 11, detect a connection request event from the port, and trigger the connection reception processing pool 134 when a connection request event is detected; The connection receiving processing pool 134 is used to process the connection request event, establish the connection requested by the connection request event, seize the resource of the message processor 14 , and register the data processing event of the established connection to the message processor 14 . In order to achieve a better effect, the connection receiving processing pool 134 is also configured to update the information of the connection requested to be established by the connection request stored in the connection maintenance pool 11 after the connection requested by the connection request event is established. Wherein, the connection information read by the connection maintenance pool 11 may include identification information such as the port number of the port to be monitored.

In order to achieve a better effect of the invention, as shown in FIG. 2 , the message processor 14 may include a data processing event listener 142 and a message processing scheduling module 144 . Wherein, the data processing event listener 142 is used to monitor the data processing event registered to the message processor 14, and triggers the message processing scheduling module 144 when the data processing event is monitored; the message processing scheduling module 144 is used to schedule preset A thread of the plurality of threads handles the data processing event.

Through the above-mentioned device provided by the embodiment of the present invention, the scheduling strategy of preempting the processing time of the message processor by the device connector and the connection receiver avoids that in the case of high concurrency, due to the high load operation of the message processor, it cannot respond to new messages. The event registration request for establishing a connection; at the same time, since the number of requests for event operations is much lower than the number of requests for message processing events, the preemption of message processors will not have a great impact on message processing performance, while improving Transfer speed for connection processing.

In a preferred implementation of the embodiment of the present invention, the message processor 14 can divide the data processing event into a plurality of sub-operations, and then execute each of the sub-operations in order, for example, the data processing event listener 142 is responsible for monitoring the connection After the message processing event is detected, the message processing event will be handed over to the message processing scheduling module for processing 144. The message processing scheduling module 144 is responsible for reading, parsing, and encapsulating the byte stream on the network connection. And finally dispatch the processing result to the superior application for processing. Through this implementation mode, different processing steps of messages on multiple connections can be performed simultaneously, thereby making full use of the performance of multi-core processors, speeding up the processing flow of messages, effectively improving the throughput of message processing, and greatly improving network performance. The processing performance of the communication layer.

Fig. 3 is the flowchart of the communication method of the RFID device interface layer according to the embodiment of the present invention, as shown in Fig. 3, the communication method of the RFID device interface layer in the embodiment of the present invention comprises:

Step S302, read the information of a connection to be established stored in the connection maintenance pool, if the connection mode is the active mode, then perform step S304, if the connection mode is the passive mode, perform step S306;

For example, it can be judged whether the mode of the connection is an active module or a passive module according to whether the connected IP address and port number are specified in the read connection information. Wherein, the connection information in the connection maintenance pool can be added by an upper layer application.

In the specific implementation manner in the embodiment of the present invention, when the connection mode is the active mode, the connection parameters can be initialized first, and then the connection is initiated, and at the same time, the connection is registered to the connection initiation event monitoring of the device connector device.

Step S304, the device connector initiates a connection request to the RFID device according to the connection information, establishes the connection after detecting the response message returned by the RFID device, then seizes the resources of the message processor, and registers the data processing event of the established connection To the message processor, execute step S308;

In order to update the connection information stored in the connection maintenance pool in real time, in this embodiment, after the connection is established, the device connector may update the connection information stored in the connection maintenance pool requested by the connection request to be established.

Among them, a connection initiation event listener and a connection initiation event processing pool can be set in the device connector. After the connection initiation event listener detects the connection initiation event, it will hand over the event to the connection initiation event processing pool responsible for completing the connection operation. After the connection initiation event processing pool completes the establishment of the connection, it tries to preempt the processing time of the message processor. After obtaining the processing time of the message processor, the connection initiation event processing pool simultaneously registers the data processing event of the connection into the data processing event listener of the message processor, and then executes step S308.

Step S306, the connection receiver monitors the predetermined port according to the connection information, and after receiving the connection request event, establishes the connection requested by the connection request event, seizes the resources of the message processor, and registers the data processing event of the established connection to the message handler;

For example, the connection request event can be monitored by the connection receiving event listener in the connection receiver. After listening to the connection request event, the event is handed over to the connection receiving event processing pool responsible for receiving the connection processing. After the connection receiving event processing pool is completed After receiving the connection operation, update the corresponding connection information in the maintenance pool at the same time, and try to preempt the processing time of the message processor. After obtaining the processing time of the message processor, the connection receiving event processing pool registers the data processing event of the connection to the data processing event listener of the message processor.

Similarly, in order to update the connection information stored in the connection maintenance pool in real time, after the connection requested by the connection request event is established, the connection receiver also simultaneously updates the information of the connection requested by the connection request stored in the connection maintenance pool.

In step S308, the message processor monitors the data processing event registered therein, and processes the data processing event after monitoring the data processing event.

In the specific implementation manner of the embodiment of the present invention, the message processor may process the data processing event by dividing the data processing event into multiple sub-operations. Preferably, the preset number of threads is the same as the number of sub-operations. For example, calling one of the preset multiple threads executes each of the sub-operations in sequence, wherein the multiple sub-operations include: reading, parsing, encapsulating and distributing so that different processing of messages on multiple connections can be performed The steps are carried out at the same time, making full use of the multi-core performance of modern processors, speeding up the message processing process, effectively improving the throughput of message processing, and greatly improving the processing performance of the network communication layer. The way of multiple sub-operations can be processed by four-stage pipeline for the data to be processed. First, the data processing event listener will transfer the received data processing event of the connection to the message processing scheduling module, and then the message processing scheduling module Multiple threads assigned to presets are processed sequentially. For example, the processing of one of the data processing events by a message processor may include the following steps:

Step 1, enter the first-level processing of the four-level pipeline: read the network byte stream, and store the read result in the cache;

Step 2, enter the second-level processing of the four-level pipeline: parse the byte stream in the cache into a data frame;

Step 3, enter the third-level processing of the four-level pipeline: encapsulate the parsed data frame into a message object;

Step 4, enter the fourth-level processing of the four-level pipeline: distribute the encapsulated message to the upper-layer application for further processing.

Fig. 4 is a schematic diagram of a connection establishment process in a mixed mode according to a preferred embodiment of the present invention. In combination with Fig. 2, in the embodiment of the present invention, for the RFID device in the hybrid link establishment mode supported by the present invention, its connection establishment method mainly includes the following step:

Step 401: After the system is started, the process starts;

Step 402: Obtain the information about the connections to be established in the connection maintenance pool, wherein all related information about the connections to be established can be added by the upper layer application;

Step 403: Judging whether the connection IP address and port number are specified in the obtained connection information, if not specified, it is regarded as a passive connection, and enters step 404, if specified, it is regarded as an active connection, and enters step 408;

Step 404: connect the receiver to create a passive mode connection;

Step 405: register the connection receiving event to the connection receiving event listener, and wait for the connection establishment request of the device;

Step 406: After listening to the connection receiving event, the connection receiving event processing pool completes the connection establishment operation;

Step 407: According to the actual connection situation, after updating the connection information in the connection pool, go to step 411;

Step 408: the device connector creates a connection in active mode;

Step 409: Initiate a connection request to the device, register a connection initiation event to the connection initiation event listener, and wait for a link establishment response from the device;

Step 410: After getting the response from the device, the connection initiation event processing pool completes the establishment of the connection;

Step 411: Preempting the processing event of the message event handler to release resources;

Step 412: Register the message processing event to the message event handler;

Step 413: release the resources of the message event handler and hand them back to the message event handler;

Step 414: Determine the operating status of the system, if the system continues to operate, return to step 402, otherwise enter step 415;

Step 415: Stop processing, and the flow ends.

Fig. 5 is a schematic diagram of a message processor preemption strategy according to an embodiment of the present invention. As shown in Fig. 5, for a device connector or a connection receiver whose connection is successfully established, the message processor reports a connection initiation event or a connection reception event according to The following data processing procedures are processed:

Step 501: After the system is started, the process starts;

Step 502: Obtain resources required for data processing;

Step 503: Monitor the message processing event of the connection, and after the connection reports the message, hand over the monitored message processing event to the message processing pool for processing;

Step 504: the message processing pool processes the message;

Step 505: Detect whether there is a device connector or connection receiver preempting its occupied resources, if there is a preemption request, perform step 506, if there is no preemption request, then perform step 507;

Step 506: Release the occupied resources and suspend processing;

Step 507: Determine the operating status of the system, if the system continues to operate, return to step 502, otherwise enter step 508;

Step 508: Stop processing, and the flow ends.

6 is a schematic structural diagram of a four-stage message processing pipeline according to a preferred embodiment of the present invention. As shown in FIG. The message processing event to the message processor is processed, including:

The process of message processing is divided into four steps: reading, parsing, encapsulation and distribution. Among them, the reading operation is responsible for reading the byte stream sent by the device and caching it; the parsing operation is responsible for scanning the cache The data in the frame is searched for the frame header and frame tail, and a frame is parsed; the encapsulation operation is responsible for encapsulating the frame data into the object or structure required by the upper-layer application; the distribution operation is responsible for delivering the encapsulated object or structure to the upper-layer application for processing.

In the specific implementation of the embodiment of the present invention, the entire message processing process needs to be divided into four steps for processing, although for a single message analysis, its processing speed is slower than direct processing, but in the case of high message concurrency and data volume In large cases, pipeline processing shows its advantages. For example, the average processing time of a message is about 1/4 of the original message processing method, which can effectively increase the throughput of the system and improve the network performance of the system. .

From the above description, it can be seen that the present invention achieves the following technical effects:

By supporting the mixed connection establishment mode of RFID equipment and the unified connection maintenance pool management method, and using the unified message processor to process the connection, the communication device of the interface layer of the radio frequency identification equipment is adopted, on the one hand, different communication is guaranteed Devices in different modes can establish connections with applications. On the other hand, connections in different modes can be maintained and processed in a unified manner, thereby reducing the development difficulty of maintaining different modes of connection and the complexity of the system, and effectively improving the system. performance. Moreover, in the embodiment of the present invention, the processing time of the message processor is preempted by the device connector and the connection receiver, thereby avoiding the failure to respond to the newly established connection in the case of high concurrency due to the high load operation of the message processor. Event registration requests; at the same time, since the number of requests for event operations is far lower than the number of requests for message processing events, the preemption of message processors will not have a great impact on message processing performance, and at the same time improve the connection processing. transfer speed. In addition, in the embodiment of the present invention, when processing a data processing event, the processing flow of the data processing event (that is, a message) is split into multiple sub-steps, and a multi-stage pipeline processing mode is introduced, so that multiple connected messages Different processing steps are carried out at the same time, making full use of the multi-core performance of modern processors, speeding up the message processing process, effectively improving the throughput of message processing, and greatly improving the processing performance of the network communication layer.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (12)

1. A communication device for radio frequency identification (RFID) device interface layer, characterized in that, comprising: The connection maintenance pool is used to store all the connections to be established and the information of each of the connections, and read the information of each of the connections to be established in sequence, and if the mode of the read connection is passive mode, trigger the connection a receiver that triggers the device connector if the read mode of said connection is an active mode; The device connector is configured to initiate a connection request to the RFID device according to the read connection information, and establish the connection requested by the connection request after detecting the response message returned by the RFID device, and preempt A resource of a message processor, registering the data processing event of the established connection with the message processor; The connection receiver is used to monitor the connection request event, and after receiving the connection request event, establish the connection requested by the connection request event, seize the resource of the message processor, and process the data processing event of the connection register with said message handler; The message processor is configured to monitor the data processing event registered therein, and process the data processing event after monitoring the data processing event. 2. The apparatus of claim 1, wherein the device connector comprises: A connection initiation event listener, configured to detect a response message of the connection request, and after detecting the response message, trigger a connection initiation event processing pool; The connection initiation event processing pool is used to complete the establishment operation of the connection requested by the connection request, seize the resources of the message processor, and register the data processing event of the established connection to the message processing device. 3. The device according to claim 2, wherein the connection initiation event processing pool is further configured to update the connection information stored in the connection maintenance pool after the establishment operation of the connection requested by the connection request is completed. The connection request includes information about the requested connection. 4. The device of claim 1, wherein the connection receiver comprises: A connection reception event listener, configured to monitor a predetermined port according to the read connection information, detect a connection request event from the port, and trigger a connection reception processing pool when a connection request event is detected; The connection receiving processing pool is used for processing the connection request event, establishing the connection requested by the connection request event, preempting the resource of the message processor, and registering the data processing event of the established connection in the message processor. 5. The device according to claim 4, wherein the connection reception processing pool is further configured to update the connection request stored in the connection maintenance pool after the connection requested by the connection request event is established Information about the requested connection. 6. The device according to any one of claims 1 to 5, wherein the message processor is configured to divide the data processing event into multiple sub-operations, and execute each of the sub-operations in sequence. 7. The device according to claim 6, wherein the message processor comprises: A data processing event listener, configured to monitor data processing events registered to the message processor, and trigger a message processing scheduling module when the data processing event is detected; The message processing scheduling module is configured to schedule one thread in a plurality of preset threads to process the data processing event. 8. A communication method of an RFID device interface layer, characterized in that, comprising: Step 1, read the information of a connection to be established stored in the connection maintenance pool, if the mode of the connection is active mode, then perform step 2, if the mode of the connection is passive mode, perform step 3; Step 2, the device connector initiates a connection request to the RFID device according to the connection information, after detecting the response message returned by the RFID device, establishes the connection, then seizes the resources of the message processor, and transfers the established The data processing event of the connection is registered to the message processor, and step 4 is performed; Step 3: The connection receiver listens to a predetermined port according to the connection information, and after receiving the connection request event, establishes the connection requested by the connection request event, seizes the resources of the message processor, and uses the established The connected data processing event is registered to the message handler; Step 4, the message processor monitors the data processing event registered therein, and processes the data processing event after monitoring the data processing event. 9. The method according to claim 8, wherein after the device connector establishes the connection, the method further comprises: the device connector updating the connection stored in the connection maintenance pool Requests information about the requested connection. 10. The method according to claim 8, wherein after the connection receiver establishes the connection requested by the connection request event, the method further comprises: the connection receiver updates the connection maintenance pool The stored information of the connection requested by the connection request to be established. 11. The method according to any one of claims 8 to 10, wherein the message processor processing the data processing event comprises: the message processor dividing the data processing event into a plurality of sub-operations , invoking one of the preset multiple threads to execute each of the sub-operations in sequence. 12. The method according to claim 11, wherein the plurality of sub-operations include: reading, parsing, encapsulating and distributing.

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