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Remote active radio frequency identification device communication control method used for highway

A radio frequency identification device and expressway technology, applied in the direction of instruments, inductive recording carriers, electrical components, etc., can solve the problems of vehicles that cannot obtain traffic flow information, do not know the vehicle path, etc., and achieve the solution of two-way communication difficulties, communication control methods Simplicity, the effect of reducing transmit power and cost

Inactive Publication Date: 2013-10-23
XI AN CHENGFENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a communication control method for remote active radio frequency identification devices used in expressways, to overcome the inability to obtain traffic flow information in the prior art and the monitoring center does not know the vehicle path if the vehicle does not leave the expressway the problem of the situation

Method used

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  • Remote active radio frequency identification device communication control method used for highway
  • Remote active radio frequency identification device communication control method used for highway
  • Remote active radio frequency identification device communication control method used for highway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: (no retreat)

[0043] (1) After two vehicle identification cards (card numbers ID1 and ID2) receive the data packet (that is, broadcast information) from the wireless path identification station at the rate of 250kbps at the time t1, they back off according to the anti-collision mechanism, and ID1 happens to have no Backoff delay, directly send out its own ID number at 10mw / 10kbps at time t2 after receiving it, while ID2 card waits for time T2 and sends it at time t4; the so-called anti-collision mechanism refers to waiting for several After an integral multiple of T1, the data is sent out;

[0044] (2) At time t3, the wireless path identification station sends its own identification station ID number again, and also sends the ID number of the ID1 card at the same time, that is, the confirmation packet (confirmation information) of the ID1 card, and is received by the ID1 card. Thereafter, the ID1 card does not process the subsequent data until a new ID nu...

Embodiment 2

[0045] Example 2: (in the case of evasion)

[0046] (1) After two vehicle identification cards (card numbers ID1 and ID2) receive the data packet from the wireless path identification station at a rate of 250kbps at time t1, they back off according to the anti-collision mechanism, and ID1 just has no back-off delay. Send out its own ID number at 10mw / 10kbps at time t2 after receiving it, while the ID2 card waits for time T2 before sending it at time t4; the so-called anti-collision mechanism refers to waiting for several integral times of T1 After that, send the data out;

[0047] (2) At time t5, if everything is normal, the ID2 card should receive the data packet from the wireless path identification station, which should contain the confirmation information of ID2. However, if due to various reasons, the ID2 card does not receive the confirmation message containing its own ID2 at time t5, it will delay for a certain time T3 according to the back-off mechanism, and then se...

Embodiment 3

[0048] Example 3: (The confirmation packet cannot be received after backoff, so the user has to give up)

[0049] (1) After two vehicle identification cards (card numbers ID1 and ID2) receive the data packet from the wireless path identification station at a rate of 250kbps at time t1, they back off according to the anti-collision mechanism. ID1 just has no back-off delay, and directly Send out its own ID number at 10mw / 10kbps at time t2 after receiving it, while the ID2 card waits for time T2 before sending it at time t4; the so-called anti-collision mechanism refers to waiting for several integral times of T1 After that, send the data out;

[0050] (2) At time t5, if everything is normal, the ID2 card should receive the data packet from the wireless path identification station, which should contain the confirmation information of ID2. However, if due to various reasons, the ID2 card does not receive the confirmation message containing its own ID2 at t5, it will delay a ce...

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Abstract

The invention relates to a wireless communication control method, more particularly to a remote active radio frequency identification device communication control method used for a highway. According to a remote active radio frequency identification technology that is used currently, bidirectional communication can not be realized, so that traffic flow information can not be obtained in real time and a vehicle path can not be known until the vehicle is turned off the high way; however, the above-mentioned problems can be solved according to the invention. The technical scheme provided in the invention is as follows: a remote active radio frequency identification device communication control method used for a highway is provided; a wireless path identification station continually sends a data packet containing an identification number itself in a broadcasting mode at a set time interval T1, and a data packet that represents a vehicle identification number and is sent back by a vehicle identification card is received by the wireless path identification station within the sending interval; Broadcasting of the identification number itself and confirmation of the vehicle identification number are completed in a same data packet; and the vehicle identification card takes corresponded actions according to different situations. Main advantages of the invention are as follows: a bidirectional communication function between a wireless vehicle identification card and a path identification station is realized; therefore, on the premise that a vehicle path identification function is realized and completed, functions of accurate flow monitoring, vehicle localization and emergent rescue and the like can also be realized; and service and management levels of the highway can be enhanced comprehensively.

Description

technical field [0001] The invention relates to a wireless communication control method, in particular to a wireless communication control method in an expressway wireless path identification and flow monitoring system, in particular to a communication control method for a remote active radio frequency identification device used in an expressway. Background technique [0002] With the gradual formation of my country's expressway network, expressways crisscross and extend in all directions, providing a lot of route options for road transportation, which is conducive to dispersing traffic volume and relieving traffic pressure, but at the same time it also brings many difficulties to traffic management. The most prominent is the path judgment problem. At present, most provinces in my country have implemented network toll collection, and my country's expressway network toll generally adopts a closed toll system. Closed tolls collect tolls based on vehicle category and mileage. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/00H04B5/00
Inventor 陈建峰
Owner XI AN CHENGFENG TECH CO LTD
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