CN101639950B - Method and device for synchronizing data in lane toll system - Google Patents

Abstract

The invention discloses a data synchronization method and device in a lane toll collection system. The method includes the following steps: A. setting the last inserted data mark in the lane control unit database, setting a synchronization data mark in the lane toll unit database, The last insertion data mark is updated accordingly with the update of the lane control unit database; B, the lane control unit receives the data synchronization request of the lane toll unit, and returns the last insertion data mark to the lane toll unit; C, the lane toll unit according to the last time Inserting data identification and synchronous data identification calculation requires the data identification returned by the lane control unit and sending it to the lane control unit; D. The lane control unit transmits the corresponding data to the lane toll unit according to the received data identification; E. The lane toll unit Receive corresponding data, update its own database and synchronize data identification. The invention has small synchronous data volume, fast and time-saving synchronous process, and high accuracy.

Description

A data synchronization method and device in a lane toll collection system

technical field

The invention relates to a data synchronization method and device in a lane toll collection system.

Background technique

At present, in the lane toll system, there are existing methods of utilizing radio frequency identification (Radio Frequency Identification, RFID to carry out the data synchronization of the lane and the toll station. The basic RFID lane toll system as shown in Figure 1, mainly consists of RFID vehicle tags (Tag) 100 -102, RFID driveway reader (Reader) 110-112, toll lane 120-122, ETC (Electronic TollCollection, electronic toll collection) toll station system server 130 and ETC toll station system client 140.Maintenance process at the lane toll station Among them, the lane control system will report data to the lane toll station whenever a vehicle passes by, but due to various problems, this kind of information may be lost. Once lost, it will affect the normal report statistics work, so the data needs to be analyzed Accurate synchronization. However, due to the huge number of cars passing through the lane toll booth, all synchronous data will inevitably cause a large amount of data transmission, which will occupy bandwidth and affect other business communications between systems.

In the current RFID system, there is no method for database synchronization. Although in some other application systems (such as communication systems), there are various database synchronization methods, most of them are time-related, and the synchronization methods are complicated and time-consuming, especially there is no data for data synchronization between lanes and toll stations A synchronization method with small differences and high requirements for synchronization accuracy.

Contents of the invention

In view of this, the present invention proposes a data synchronization method and device in a lane toll collection system, which can effectively shorten the synchronization time and reduce the bandwidth occupied by synchronization.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A data synchronization method in a lane toll collection system, comprising the steps of:

A, in the lane control unit database, the insertion data mark is set for the last time, and the synchronous data mark is set in the lane toll unit database, and the insertion data mark for the last time is correspondingly updated with the lane control unit database update;

B. The lane control unit receives the data synchronization request of the lane toll unit, and returns the last inserted data identifier to the lane toll unit;

C. The lane toll collection unit calculates the data identifier that needs to be returned by the lane control unit according to the received last inserted data identifier and its own synchronous data identifier and sends it to the lane control unit;

D. The lane control unit transmits the corresponding data to the lane toll unit according to the received data identification sent back by the lane control unit;

E. The lane toll collection unit receives the corresponding data from the lane control unit, and updates its own database and synchronization data identification.

In the step C, the lane toll collection unit calculates the data identity that needs to be returned by the lane control unit according to the received last insertion data identity and its own synchronous data identity as follows:

C1. The lane toll collection unit compares the received last insertion data identification and its own synchronization data identification, if the synchronization data identification is less than the last insertion data identification, the area between the two values is used as the retrieval area; if the synchronization data identification is greater than the last inserted data mark, the area between the synchronized data mark to the maximum mark and the minimum mark to the last inserted data mark is used as the retrieval area;

C2. Check whether there is a non-existing mark in the search area, and if there is, use the non-existing mark as the data mark that needs to be sent back by the lane control unit.

In the step B, the data synchronization request of the lane toll collection unit is initiated by timing trigger or trigger when needed.

The initiation of the data synchronization request also includes connection exception handling:

For timing triggering, stop the connection attempt after one connection failure, and record it in the exception log;

For triggering when needed, 5 connection attempts are made when the connection fails, and a failure prompt is issued after all failures.

In the data synchronization method, the lane toll collection system is a radio frequency identification system.

The invention also discloses a data synchronization device for a lane toll system, the lane toll system includes a lane control unit and a lane toll unit, and the data synchronization device includes a device for setting the last insertion data in the lane control unit database Identify and set the data identification configuration module of the synchronous data identification in the lane charging unit database, the data identification configuration module is also used to update the synchronous data identification after data synchronization, and insert data for the last time after the lane control unit database update The identification is updated; it also includes a data synchronization module, which is used to control the lane toll collection unit to initiate a data synchronization request to obtain the last insertion data identification of the lane control unit, and calculate the need for the lane control unit to return according to the last insertion data identification and synchronization data identification. For the data identification of the lane toll unit, control the lane control unit to transmit the data corresponding to the data identification that needs to be sent back to the lane toll unit by the lane control unit to the lane toll unit.

In the data synchronization device, the calculation of the data identifier that needs to be returned by the lane control unit according to the last inserted data identifier and its own synchronous data identifier is performed in the following manner: compare the received last inserted data identifier and its own If the synchronization data identifier is smaller than the last inserted data identifier, the area between the two values will be used as the retrieval area; if the synchronized data identifier is greater than the last inserted data identifier, the synchronized data will be identified between the maximum identifier and the minimum The area between the identification and the last inserted data identification is used as a retrieval area; in the retrieval area, check whether there is a non-existing identification, and if so, use the non-existing identification as the data identification that needs to be returned by the lane control unit.

In the data synchronization device, the data synchronization request is initiated by timing trigger or trigger when needed.

In the data synchronization device, the initiation of the data synchronization request also includes connection exception processing:

For timing triggering, stop the connection attempt after one connection failure, and record it in the exception log;

For triggering when needed, 5 connection attempts are made when the connection fails, and a failure prompt is issued after all failures.

In the data synchronization device, the lane toll collection system is a radio frequency identification system.

The present invention sets the latest data mark in the lane control unit database and the previous synchronization mark in the lane toll unit database respectively, so that missing data in the lane toll unit can be quickly found and data synchronization is completed. Therefore, the amount of synchronized data is small, the synchronization process is fast, time-saving, and accurate.

Description of drawings

Fig. 1 is a block diagram of the RFID lane toll collection system in the prior art;

Fig. 2 is a flow chart of a data synchronization method according to a specific embodiment of the present invention;

Fig. 3 is a block diagram of an RFID lane toll collection system according to a specific embodiment of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and in combination with specific embodiments.

As shown in Figure 2, the data synchronization method of the specific embodiment of the present invention mainly comprises the following steps, wherein, the lane toll station corresponds to the aforementioned lane toll unit, and the lane control system corresponds to the aforementioned lane control unit:

(201) The lane toll station is triggered according to the customized time or manual click, and actively connects to the lane control system database;

(202) The lane control system responds after receiving the synchronous information, and returns the last inserted ID data to the lane toll station system;

(203) The lane toll station calculates the data ID that needs to be returned by the lane according to the last synchronous flag position and the last insertion ID of the lane;

(204) The lane toll station transmits these IDs to the lane control system;

(205) The lane control system queries the local database according to these ID values, and sends these data back to the lane toll station;

(206) The lane toll station collects the data transmitted from the lane control system, updates its own data, and updates the sign position at the same time after updating. So far the entire synchronization process is completed.

In step (201), exception handling is also included: if the synchronization triggered by the customized time fails to connect, the attempt will be given up after one attempt and recorded in the exception log. If the data synchronization triggered manually fails to connect, it will continue to try 5 times, and prompt the user if it fails.

In step (203), after the lane toll station receives the last inserted ID value, it will calculate the data that may be missing, and then request these data from the lane control system in step (204). The specific operation process is:

1) The lane toll station receives the last inserted ID value, which is the ID value of the latest data of the lane at that time. Then compare it with the ID value of the synchronization flag. If the flag ID is smaller than the last insertion ID, the area between the two values will be used as the retrieval area; if the flag ID is greater than the last insertion ID, the ID flag will be selected to the maximum. The area between the ID value and the minimum value of ID to the last inserted ID is used as the retrieval area.

2) In the retrieved area, check the non-existing ID values one by one according to the rule of increasing by 1 each time, and then the lane toll station will transmit these non-existing ID values to the lane control system as possible lost data.

As shown in Figure 3, the implementation environment of the present invention is: the data of lane control system, just have an ID value as the primary key of database in the synchronous data table, every time increasing data all can add 1 to the last inserted data ID value as The ID value of the latest data. Similarly, there is a same data table in the database of lane toll stations. When the system is running, the lane control system transmits the data information of vehicles passing to the lane toll station. The data synchronization process of the present invention is described in detail below with an example:

1. Firstly, the lane toll station initiates synchronous information as needed (either a timed task or manually triggered), and transmits the information to the lane control system, corresponding to the aforementioned step (201).

2. If the transmitted data does not receive any response from the lane control system within 5 seconds, it will be regarded as a connection failure, or reconnect, or record the connection failure to the log, corresponding to the exception handling process of the preceding step (201) .

3. After receiving the synchronous connection request, the lane control system sends the ID value 2000 of the last inserted data to the lane toll booth, corresponding to step (202).

4. After the lane toll station receives the last inserted ID value of 2000, check that the current synchronization flag is 1000, then check which ID values are missing in the data with IDs from 1000 to 2000 in the current database, for example, the missing ID is 1997, Two data of 1998 (because synchronous data generally seldom produces missing data, so this set will not be very large), and these missing ID values are sent to the lane control system, corresponding to steps (203), (204).

5. After the lane control system receives the set of ID values, it looks up these data items in its own data table, and transmits these data items to the lane toll booth, corresponding to step (205).

6. After the lane toll station receives these data items, it updates its own database, and sets its own synchronization flag to 2000 after the update. Corresponding to step (206).

Compared with the prior art, the data synchronization method of the RFID lane toll collection system according to the present invention not only effectively reduces the time for data synchronization, but also reduces the bandwidth occupied by synchronization and reduces the synchronization data The transmission volume, thus improving the efficiency, reliability and stability of the RFID lane toll collection system. At the same time, because the technical details are shielded from the user, the user is faced with a whole version, and does not need to know the relevant details of the sub-version, thereby reducing the difficulty of operation, facilitating user operation, and protecting the key technology of the system implementation.

The invention also discloses a data synchronization device for a lane toll system. The lane toll system includes a lane control unit and a lane toll unit. The data identification configuration module of synchronization data identification is set in the charging unit database, and the data identification configuration module is also used for updating the synchronization data identification after data synchronization, and updating the last insertion data identification after the lane control unit database update; It also includes a data synchronization module, which is used to control the lane charging unit to initiate a data synchronization request to obtain the last inserted data identifier of the lane control unit, and calculate the need for the lane control unit to send back to the lane charging unit according to the last inserted data identifier and the synchronized data identifier control the lane control unit to transmit the corresponding data of the data mark that needs to be sent back to the lane toll unit by the lane control unit to the lane toll unit. Since the working mode of the data synchronization device is similar to the data synchronization method, it will not be repeated here.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (8)

1. the method for data synchronization in the lane toll system is characterized in that, comprises following steps:

A, last insertion Data Identification is set in the lane control unit database, in the lane roll unit database, synchronous data identification is set, the corresponding renewal of described last insertion Data Identification with the lane control unit database update;

B, lane control unit receive the data synchronization request of lane roll unit, and described last insertion Data Identification is returned to lane roll unit;

The Data Identification that last insertion Data Identification that C, lane roll unit basis receive and the synchronous data identification of self calculating needs lane control unit are passed back also sends to lane control unit, calculates the Data Identification that needs lane control unit to pass back and carries out as follows:

Last insertion Data Identification and the synchronous data identification of self that the comparison of C1, lane roll unit receives, if synchronous data identification less than the last Data Identification that inserts, then with the zone between two numerical value as search domain; If synchronous data identification is greater than the last Data Identification that inserts, then with synchronous data identification to the zone between the maximum sign, and minimumly be identified to zone between the last insertion Data Identification as search domain;

C2, check in search domain whether non-existent sign is arranged, if any, with described non-existent sign as the Data Identification that needs lane control unit to pass back;

D, lane control unit are passed to lane roll unit according to receiving the Data Identification that described needs lane control unit is passed back with the data of correspondence;

E, lane roll unit receive the corresponding data that lane control unit transmits, and upgrade self database and synchronous data identification.

2. method of data synchronization as claimed in claim 1 is characterized in that, the data synchronization request of lane roll unit is initiated by the mode that regularly triggers or trigger when needing among the described step B.

3. method of data synchronization as claimed in claim 2 is characterized in that, described data synchronization request initiates also to comprise the connection abnormality processing;

For regularly triggering, stop after the connection failure once connecting and attempt, record abnormal log;

Trigger during for needs, connect to carry out connecting for 5 times when obstructed and attempt, sending failure after all fail and pointing out.

4. as the arbitrary described method of data synchronization of claim 1 to 3, it is characterized in that described lane toll system is a radio-frequency recognition system.

5. data synchronization unit that is used for lane toll system, it is characterized in that, described lane toll system comprises lane control unit and lane roll unit, described data synchronization unit comprises and is used for last insertion Data Identification being set and the Data Identification configuration module of synchronous data identification being set in the lane roll unit database at the lane control unit database, described Data Identification configuration module also is used for after data sync synchronous data identification being upgraded, and behind the lane control unit database update last insertion Data Identification is upgraded; Also comprise data simultaneous module, be used to control lane roll unit and initiate the last insertion Data Identification that data synchronization request is obtained lane control unit, calculate the Data Identification that the needs lane control unit is returned to lane roll unit according to described last insertion Data Identification and synchronous data identification, the control lane control unit transmits the corresponding data of the Data Identification that needs lane control unit to be returned to lane roll unit and gives lane roll unit, described basis is inserted Data Identification and the synchronous data identification of self for the last time and is calculated the Data Identification that the needs lane control unit passes back and carry out as follows: last insertion Data Identification and the synchronous data identification of self that comparison receives, if synchronous data identification is less than the last Data Identification that inserts, then with the zone between two numerical value as search domain; If synchronous data identification is greater than the last Data Identification that inserts, then with synchronous data identification to the zone between the maximum sign, and minimumly be identified to zone between the last insertion Data Identification as search domain; Whether check in search domain has non-existent sign, if any, with described non-existent sign as the Data Identification that needs lane control unit to pass back.

6. data synchronization unit as claimed in claim 5 is characterized in that, described data synchronization request is to initiate by the mode that regularly triggers or trigger when needing.

7. data synchronization unit as claimed in claim 6 is characterized in that, described data synchronization request initiates also to comprise the connection abnormality processing:

For regularly triggering, stop after the connection failure once connecting and attempt, record abnormal log;

Trigger during for needs, connect to carry out connecting for 5 times when obstructed and attempt, sending failure after all fail and pointing out.

8. as the arbitrary described data synchronization unit of claim 5 to 7, it is characterized in that described lane toll system is a radio-frequency recognition system.

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