CN103488961A - Error wake-up signal shielding method and active electronic tag - Google Patents
Error wake-up signal shielding method and active electronic tag Download PDFInfo
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Abstract
The invention discloses an error wake-up signal shielding method which includes the steps of after a wake-up signal is received, if a data interaction signal is not received within a preset data interaction time limit, calculating the transmission frequency of the wake-up signal, if the transmission frequency of the wake-up signal is higher than a preset shielding threshold, determining the wake-up signal received at present to be an error wake-up signal, and shielding the error wake-up signal. The invention further discloses an active electronic tag at the same time. According to the error wake-up signal shielding method and the active electronic tag, the error wake-up signal can be effectively recognized, the number of times by which the active electronic tag is switched into a working condition from a dormant condition is reduced, then electric losses of the active electronic tag are reduced, and the service life of the active electronic tag is prolonged.
Description
Technical Field
The present invention relates to Radio Frequency Identification (RFID) technology in the field of wireless communication, and in particular, to a method for shielding a false wake-up signal and an active electronic tag.
Background
RFID is a technology for automatically identifying a target object and acquiring data by a radio frequency signal. The RFID system can be composed of an electronic tag and a reader; wherein, the electronic tags include: active electronic tags and passive electronic tags. The active electronic tag is in a dormant state at ordinary times, and when the active electronic tag receives a wake-up signal from a reader, the active electronic tag is converted into a working state from the dormant state; when data interaction between the active electronic tag and the reader is completed or interaction errors occur, the active electronic tag enters the dormant state again.
However, in practical application scenarios, due to the complex electromagnetic environment, there may be interference sources similar to readers, which may frequently transmit false wake-up signals. Such as: taking a path identification system as an example, an active electronic tag of the path identification system works in a high-frequency band and an ultrahigh-frequency band, wherein a high-frequency signal is used as a wake-up signal, and an ultrahigh-frequency signal is used as a data interaction signal; when the active electronic tag receives the high-frequency signal, the high-frequency signal is used as a wake-up signal to enter a working state, and no data interaction signal is received within a specified time, the wake-up signal is a false wake-up signal, so that when a high-frequency interference source with a long duration exists around the active electronic tag, the active electronic tag can be in the working state within a long time period, the electric quantity loss of the active electronic tag is aggravated, and the working life of the active electronic tag is reduced.
Therefore, the active electronic tag in the prior art cannot effectively identify and shield the false wake-up signal, so that the active electronic tag may be influenced by an external interference source, and frequently changes from a dormant state to a working state, thereby further aggravating the electric quantity loss of the active electronic tag and reducing the working life of the active electronic tag.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method for shielding a false wake-up signal and an active electronic tag, which can effectively identify and shield the false wake-up signal, reduce the number of times that the active electronic tag is switched from a sleep state to a working state, further reduce the power consumption of the active electronic tag, and prolong the working life of the active electronic tag.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a method for shielding false wake-up signals, which comprises the following steps:
after receiving the wake-up signal, if the data interaction signal is not received within a preset data interaction time limit, calculating the sending frequency of the wake-up signal;
and if the sending frequency of the wake-up signal is higher than a preset shielding threshold, determining that the currently received wake-up signal is a false wake-up signal, and shielding the false wake-up signal.
In the foregoing solution, before the receiving the wake-up signal, the method further includes: and detecting whether a wake-up signal is received in real time.
In the above scheme, the calculating the sending frequency of the wake-up signal includes: and within the preset calculation time length, if the wake-up signal is received, adding one to the current wake-up times until the preset calculation time length is ended, and dividing the current wake-up times by the preset calculation time length to obtain a value as the sending frequency of the wake-up signal.
In the above scheme, the shielding the false wake-up signal includes: and within the specified shielding time, closing the function of responding the wake-up signal.
In the above scheme, after the shielding the false wake-up signal, the method further includes: and after the specified shielding duration is finished, starting a function of responding to the awakening signal, reentering the dormant state, setting the awakening frequency to be zero, and continuously detecting whether the awakening signal is received in real time.
The present invention also provides an active electronic tag, comprising: a Central Processing Unit (CPU) module, a wake-up signal receiving module and a data interaction signal receiving module; wherein,
the CPU module is used for calculating the sending frequency of the wake-up signal if the data interaction signal sent by the data interaction signal receiving module is not received within a preset data interaction time limit after the wake-up signal sent by the wake-up signal receiving module is received, and determining the currently received wake-up signal as a false wake-up signal and shielding the false wake-up signal if the sending frequency of the wake-up signal is higher than a preset shielding threshold;
the data interaction signal receiving module is used for sending the data interaction signal to the CPU module;
and the wake-up signal receiving module is used for sending the wake-up signal to the CPU module.
In the above scheme, the CPU module is specifically configured to detect whether the wake-up signal sent by the wake-up signal receiving module is received in real time.
In the above scheme, the CPU module is specifically configured to, within a preset calculation time, add one to the current wake-up time if a wake-up signal sent by the wake-up signal receiving module is received, until the preset calculation time is finished, and divide the preset calculation time by the current wake-up time to obtain a value, which is used as the sending frequency of the wake-up signal.
In the above scheme, the CPU module is specifically configured to close a function of responding to the wake-up signal to shield the false wake-up signal within a specified shielding duration.
In the above scheme, the CPU module is specifically configured to, after the specified shielding duration is over, start a function of responding to the wake-up signal, re-enter a sleep state, set the wake-up frequency to zero, and continue to detect in real time whether the wake-up signal sent by the wake-up signal receiving module is received.
The method for shielding the false wake-up signal and the active electronic tag can calculate the sending frequency of the wake-up signal when the data interaction signal is not received within the preset data interaction time limit, and if the occurrence frequency of the wake-up signal is higher than the preset shielding threshold, the currently received wake-up signal is determined to be the false wake-up signal, and the false wake-up signal is shielded, so that the false wake-up signal can be effectively identified and shielded; and then can reduce the number of times that active electronic tags changed into operating condition from the dormant state through shielding the mistake awakening signal, reduce the electric quantity loss of active electronic tags, prolong active electronic tags's working life.
Drawings
FIG. 1 is a schematic flow chart of a method for shielding a false wake-up signal according to the present invention;
fig. 2 is a schematic view of the structure of the active electronic tag according to the present invention.
Detailed Description
The basic idea of the invention is: after receiving the wake-up signal, if the data interaction signal is not received within a preset data interaction time limit, calculating the sending frequency of the wake-up signal; and if the sending frequency of the wake-up signal is higher than a preset shielding threshold, determining that the currently received wake-up signal is a false wake-up signal, and shielding the false wake-up signal.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The method for shielding the false wake-up signal, as shown in fig. 1, includes the following steps:
step 101: the active electronic tag detects whether the active electronic tag receives a wake-up signal in real time, and if the active electronic tag receives the wake-up signal, the step 102 is executed; otherwise, step 101 is repeatedly performed.
Here, the wake-up signal is a signal specified in the prior art, and may be a high-frequency signal, which is not described herein.
Before step 101 is executed, the active electronic tag is in a sleep state, and the preset wake-up time (N) is zero.
Step 102: the active electronic tag judges whether a data interaction signal is received within a preset data interaction time limit, if so, the active electronic tag operates according to the data interaction signal, and the processing flow is ended; otherwise, step 103 is performed.
Here, the data interaction signal is a signal specified in the prior art, and is sent to the active electronic tag by the reader, and may specifically be an ultrahigh frequency signal, which is not described herein again; the operation according to the data interaction signal is to perform all subsequent operations according to the prior art and the data interaction signal, which is not described herein again; the data interaction time limit is a preset time length according to the actual situation.
In addition, the active electronic tag also increments the wakeup number (N) by one before executing step 103.
This step can time the preset data interaction time limit by starting the timer in the active electronic tag, such as: the active electronic label starts a self timer (T)A) And is provided with TAThe timing time (t1) of (a) is a preset data interaction time limit; if the data interaction signal is received within the time t1, operating according to the data interaction signal, and ending the processing flow; if no data interaction signal is received within the time t1, adding one to the awakening times (N), and executing the step 103;
step 103: the active electronic tag calculates the transmission frequency of the wake-up signal.
The method specifically comprises the following steps: and if the wake-up signal is received within the preset calculation time length, adding 1 to the current wake-up times until the preset calculation time length is finished, and dividing the current wake-up times by the preset calculation time length to obtain a value serving as the sending frequency of the wake-up signal.
Here, the preset calculation time period is a time period preset according to actual conditions, and may be set to 100ms, for example.
In this step, a timer in the active electronic tag may be started to time a preset calculation time, for example: the active electronic label starts a self timer (T)B) And is provided with TBThe timing time (t2) of (2) is the preset calculation time length, in the time t2, if the wake-up signal sent by the wake-up signal receiving module is received, N is added by 1 until the timing time t2 is finished, and the value obtained by dividing N by t2 is used as the sending frequency of the wake-up signal.
Step 104: the active electronic tag judges whether the sending frequency of the wake-up signal is higher than a preset shielding threshold, if so, the currently received wake-up signal is determined to be a false wake-up signal, the false wake-up signal is shielded, and the processing flow is ended; otherwise, the subsequent operation is performed according to the prior art.
Here, the masking the false wake-up signal is: within a specified shielding time, the active electronic tag closes the function of responding to the awakening signal; wherein, the specified masking duration may be equal to any constant divided by the transmission frequency of the wake-up signal, such as: when any constant is 10 and the sending frequency of the wake-up signal is 50Hz, the specified time length is 200 ms; the function of responding to the wake-up signal is a function provided by an active electronic tag specified in the prior art, and is not described herein.
After shielding the false wake-up signal, the method further comprises: and after the designated shielding duration is over, the active electronic tag starts a function of responding to the awakening signal, reenters the dormant state, sets the awakening frequency (N) to be zero, and returns to the step 101.
The following operations according to the prior art may include: after the active electronic tag enters the sleep state again according to the specification of the prior art, the wake-up time is set to 0, and the process returns to step 101.
The invention provides an active electronic tag, as shown in fig. 2, including: a CPU module 21, a wake-up signal receiving module 22 and a data interaction signal receiving module 23; wherein,
the CPU module 21 is configured to calculate a sending frequency of the wake-up signal if the wake-up signal sent by the wake-up signal receiving module 22 is not received within a preset data interaction time limit after receiving the wake-up signal, and determine that the currently received wake-up signal is a false wake-up signal if the sending frequency of the wake-up signal is higher than a preset shielding threshold, and shield the false wake-up signal;
the data interaction signal receiving module 23 is configured to send a data interaction signal to the CPU module 21;
and a wake-up signal receiving module 22, configured to send a wake-up signal to the CPU module 21.
The wake-up signal receiving module 22 is specifically configured to detect whether a wake-up signal sent by a reader is received in real time, and send the received wake-up signal to the CPU module 21; correspondingly, the CPU module 21 is further configured to detect whether the wake-up signal sent by the wake-up signal receiving module 22 is received in real time, and if so, determine whether the data interaction signal is received within the data interaction time limit, otherwise, continue to determine whether the wake-up signal sent by the wake-up signal receiving module 22 is received.
The CPU module 21 is further configured to set the wakeup time N to be zero when the active electronic tag is in the sleep state; the sleep state is a state possessed by an active electronic tag specified in the prior art, and an implementation method thereof is the prior art and is not described herein.
The data interaction signal receiving module 23 is further configured to start detecting a data interaction signal sent by the reader after receiving the start notification sent by the CPU module 21, and send the received data interaction signal sent by the reader to the CPU module 21; correspondingly, the CPU module 21 is further configured to notify the data interaction signal receiving module 23 to start after receiving the wake-up signal, determine whether the data interaction signal sent by the data interaction signal receiving module 23 is received within the data interaction time limit, perform an operation according to the data interaction signal if the data interaction signal is received, and end the operation, otherwise, calculate the sending frequency of the wake-up signal.
The CPU module 21 may time a preset data interaction time limit by starting a timer in the active electronic tag, and is specifically configured to start an internal timer (T) after receiving the wake-up signalA) And is provided with TAIf the data interaction signal sent by the data interaction signal receiving module 23 is received within the time t1, the operation is performed according to the data interaction signal, and the operation is ended; if the data interaction signal sent by the data interaction signal receiving module 23 is not received within the time t1, adding one to N, and starting to calculate the sending frequency of the wake-up signal; and the data interaction time limit is a preset time length according to the actual situation.
The CPU module 21 is specifically configured to, within a preset calculation time, add 1 to the current wake-up time if a wake-up signal is received until the preset calculation time is finished, and divide the preset calculation time by the current wake-up time to obtain a value as a sending frequency of the wake-up signal.
The CPU module 21 may time a preset calculation time by starting a timer in the active electronic tag, for example: start internal timer (T)B) And is provided with TBWhen the wake-up signal from the wake-up signal receiving module 22 is received within the time t2 (t2), N is added by 1 until the end of the time t2, and the value obtained by dividing N by t2 is used as the transmission frequency of the wake-up signal.
The CPU module 21 is specifically configured to determine whether a sending frequency of the wake-up signal is higher than a preset shielding threshold, determine that the currently received wake-up signal is a false wake-up signal if the sending frequency of the wake-up signal is higher than the preset shielding threshold, and shield the false wake-up signal, otherwise, do not perform the operation.
The CPU module 21 is specifically configured to close a function of responding to the wake-up signal within a specified shielding duration; wherein, the specified shielding duration may be equal to any constant divided by the sending frequency of the wake-up signal; the function of responding to the wake-up signal is a function provided by an active electronic tag specified in the prior art, and is not described herein.
The CPU module 21 is further configured to, after the specified shielding duration is over, start a function of responding to the wake-up signal, re-enter the sleep state, set N to zero, and continuously determine whether the wake-up signal sent by the wake-up signal receiving module 22 is received.
The active electronic tag further has all functions specified in the prior art, which are not described herein.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method for masking false wake-up signals, the method comprising:
after receiving the wake-up signal, if the data interaction signal is not received within a preset data interaction time limit, calculating the sending frequency of the wake-up signal;
and if the sending frequency of the wake-up signal is higher than a preset shielding threshold, determining that the currently received wake-up signal is a false wake-up signal, and shielding the false wake-up signal.
2. The method of claim 1, wherein prior to receiving the wake-up signal, the method further comprises: and detecting whether a wake-up signal is received in real time.
3. The method of claim 1, wherein the calculating the transmission frequency of the wake-up signal comprises:
and within the preset calculation time length, if the wake-up signal is received, adding one to the current wake-up times until the preset calculation time length is ended, and dividing the current wake-up times by the preset calculation time length to obtain a value as the sending frequency of the wake-up signal.
4. The method of claim 1, wherein masking the false wake-up signal comprises: and within the specified shielding time, closing the function of responding the wake-up signal.
5. The method according to claim 1 or 4, wherein after masking the false wake-up signal, the method further comprises: and after the specified shielding duration is finished, starting a function of responding to the awakening signal, reentering the dormant state, setting the awakening frequency to be zero, and continuously detecting whether the awakening signal is received in real time.
6. An active electronic tag, comprising: the device comprises a Central Processing Unit (CPU) module, a wake-up signal receiving module and a data interaction signal receiving module; wherein,
the CPU module is used for calculating the sending frequency of the wake-up signal if the data interaction signal sent by the data interaction signal receiving module is not received within a preset data interaction time limit after the wake-up signal sent by the wake-up signal receiving module is received, and determining the currently received wake-up signal as a false wake-up signal and shielding the false wake-up signal if the sending frequency of the wake-up signal is higher than a preset shielding threshold;
the data interaction signal receiving module is used for sending the data interaction signal to the CPU module;
and the wake-up signal receiving module is used for sending the wake-up signal to the CPU module.
7. Active electronic tag according to claim 6,
the CPU module is specifically used for detecting whether the wake-up signal sent by the wake-up signal receiving module is received in real time.
8. Active electronic tag according to claim 7,
the CPU module is specifically configured to, within a preset calculation time, add one to the current wake-up frequency if a wake-up signal sent by the wake-up signal receiving module is received, until the preset calculation time is ended, and divide the current wake-up frequency by the preset calculation time to obtain a value serving as a sending frequency of the wake-up signal.
9. Active electronic tag according to claim 8,
the CPU module is specifically configured to close a function of responding to the wake-up signal to shield the false wake-up signal within a specified shielding duration.
10. Active electronic label according to claim 9,
the CPU module is specifically used for starting the function of responding to the awakening signal after the specified shielding duration is over, reentering the dormant state, setting the awakening frequency to be zero, and continuously detecting whether the awakening signal sent by the awakening signal receiving module is received or not in real time.
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Effective date of registration: 20160908 Address after: 300308 Tianjin Airport Economic Zone, Binhai New Area seven East Road No. 2 Zhongxing Industrial Base Applicant after: ZTE INTELLIGENT IOT TECHNOLOGY CO., LTD. Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Applicant before: ZTE Corporation |
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