CN102542231B - A kind of anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter - Google Patents
A kind of anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter Download PDFInfo
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- CN102542231B CN102542231B CN201210017849.0A CN201210017849A CN102542231B CN 102542231 B CN102542231 B CN 102542231B CN 201210017849 A CN201210017849 A CN 201210017849A CN 102542231 B CN102542231 B CN 102542231B
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Abstract
A kind of special ultrahigh frequency reader-writer anti-collision algorithm of electric intelligent meter, it is comprised the following steps：0) frequency hopping；1) Select orders are sent out；2) Query orders are sent；3) Collision Number C is set to 0, obtains total timeslot number Slot_Count；4) RN16 of circular wait label response；5) QueryRep orders are sent out；If 6) obtained the response of label in the 4th step, but do not interpret EPC, then C adds 1, if interpret come if N plus 1；7) if Slot is not 0, the 4th step is returned to；8) if A is not 0, the 3rd step is returned to；If A_Select is not 0, the 3rd step is returned to；9) EPC of N number of label is issued into host computer.The present invention greatly reduces collision probability, and improves reading speed.
Description
Technical field
The present invention relates to a kind of RFID anti-collision method, particularly a kind of special ultrahigh frequency reader-writer of electric intelligent meter is prevented
Collision method.
Background technology
Existing collision-proof method is：
1) read write line sends Select orders, and the mark of taking inventory that the S of all labels is saved is put into A.
2) read write line sends Query orders, selects all S to save and takes inventory the label for being masked as A and taken inventory, the mark that will be received
Sign number N to set to 0, put cycle-index A for 2, Q values are set to Qs.
3) read write line sets to 0 Collision Number C, according to Q values, obtains total timeslot number Slot_Count (2 Q powers), and will
Slot is set to Slot_Count.
4) RN16 of read write line circular wait label response, sends ACK orders, so if the response of label is received to label
After read EPC, the otherwise time of circular wait 2ms.
5) read write line sends QueryRep orders, and Slot subtracts 1.
If 6) read write line has obtained the response of label in the 3rd step, but EPC is not interpreted, then C adds 1, if interpreting
Then N is carried out and has added 1.(it is interpreted go out EPC label take inventory mark and can be changed into B)
7) if Slot is not 0, the 4th step is come back to.
If 8) A is not for 0, A subtracts 1, Q adds 1 if C values more than Slot_Count 1/4, and Q subtracts 1 if less than 1/8, reads and writes
Device will send out QueryAdjust orders to all of label, and selection S is saved to take inventory and is masked as the label of A and taken inventory, and returns to the 3rd
Step.
9) EPC of N number of label is issued into host computer.
The above method, due to the substantial amounts of metal contained in electric intelligent meter, the signal generation to electronic tag is very big
Interference, the signal for causing to be reflected back read write line is complicated, and discrimination is low.
The content of the invention
In order to solve the above technical problems, the invention provides a kind of special ultrahigh frequency reader-writer anticollision of electric intelligent meter
Method.
Solving the technical scheme of above-mentioned technical problem is：
A kind of anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter, including：
0) the step of read write line is operated with frequency-hopping mode.
1) read write line hair Select orders, for by the S of all labels section the step of taking inventory mark and put A.
2) read write line sends Query orders, and the label that A is masked as selecting all S sections to take inventory is taken inventory, and will receive
Number of tags N set to 0, put cycle-index A for 2, Q is set to Qs, the step of to put selection mark cycle number of times A_Select be 1.
3) for Collision Number C to be set to 0, according to Q values, total timeslot number Slot_Count is obtained, and Slot is set to Slot_
The step of Count.
4) for the RN16 of circular wait label response the step of, if read write line receives label response, read write line hair ACK
The label is ordered, then read write line reads EPC, otherwise one section of read write line circular wait.
5) read write line hair QueryRep orders, the step of for subtracting 1 by Slot.
If 6) obtained the response of label in the 4th step, but read write line does not interpret EPC, then enter to be about to the step that C plus 1
Suddenly, come if read write line is interpreted, the step of enter to be about to N plus 1；
7) if Slot is not 0, the 4th step is returned to.
If 8) A is not 0, the step of carrying out A and subtract 1, the step of Q plus 1 is carried out if C values are more than the 1/4 of Slot_Count,
If C values are less than the 1/8 of Slot_Count, the step of carrying out Q and subtract 1, read write line gives all of label hair QueryAdjust lives
Order, is taken inventory for selecting S to save to take inventory to be masked as the label of A, the step of return to 3 step；If A_Select is not 0, enter
Row A_Select subtracts 1, recalculates Qs values, the step of modification receiving sensitivity, read write line hair Select and Query orders, use
The step of the label for selecting not taking inventory is taken inventory, is returned to 3 step.
9) for the EPC of N number of label to be issued into host computer the step of.
Used as improvement, total timeslot number Slot_Count is 2 Q powers.
As improvement, above-mentioned steps 4) time of circular wait automatically determines according to LF.
Used as improvement, in taking inventory every time, largest loop reads 6 and takes turns label.
The beneficial effects of the invention are as follows：Using frequently frequency hopping working method, can anti-stop signal interference；Add sensitivity
Regulation, increases the probability that label is read；By repeating to send select and query orders, label is prevented because not parsing this
Two are ordered and skip；Take inventory every time, largest loop reads 6 and takes turns label, and existing is 3 wheels, so that it is general greatly to reduce collision
Rate, the label do not read is generally not because the reason for colliding；Stand-by period is automatically determined by LF, its time is much smaller than
2ms, improves the speed of reading；Therefore, for the foregoing reasons and the above method, the special superelevation of electric intelligent meter of the invention
Frequency read write line collision-proof method, greatly reduces collision probability, and improve reading speed.
Brief description of the drawings
Fig. 1 is the flow chart of anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter of the present invention.
Specific embodiment
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, a kind of anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter step is as follows：
0) the step of read write line is operated with frequency-hopping mode.
1) read write line hair Select orders, for by the S of all labels section the step of taking inventory mark and put A.
2) read write line sends Query orders, and the label that A is masked as selecting all S sections to take inventory is taken inventory, and will receive
Number of tags N set to 0, put cycle-index A for 2, Q is set to Qs, the step of to put selection mark cycle number of times A_Select be 1.
3) for Collision Number C to be set to 0, according to Q values, total timeslot number Slot_Count, total timeslot number Slot_Count are obtained
It is 2 Q powers；And the step of Slot is set into Slot_Count.
4) for the RN16 of circular wait label response the step of, if read write line receives label response, read write line hair ACK
Order the label, then read write line reads EPC, otherwise one section of read write line circular wait, time of circular wait according to LF from
It is dynamic to determine.
5) read write line hair QueryRep orders, the step of for subtracting 1 by Slot.
If 6) obtained the response of label in the 4th step, but read write line does not interpret EPC, then enter to be about to the step that C plus 1
Suddenly, come if read write line is interpreted, the step of enter to be about to N plus 1；
7) if Slot is not 0, the 4th step is returned to.
If 8) A is not 0, the step of carrying out A and subtract 1, the step of Q plus 1 is carried out if C values are more than the 1/4 of Slot_Count,
If C values are less than the 1/8 of Slot_Count, the step of carrying out Q and subtract 1, read write line gives all of label hair QueryAdjust lives
Order, is taken inventory for selecting S to save to take inventory to be masked as the label of A, the step of return to 3 step；If A_Select is not 0, enter
Row A_Select subtracts 1, recalculates Qs values, the step of modification receiving sensitivity, read write line hair Select and Query orders, use
The step of the label for selecting not taking inventory is taken inventory, is returned to 3 step.
9) for the EPC of N number of label to be issued into host computer the step of.
In above-mentioned steps, in taking inventory every time, largest loop reads 6 and takes turns label.
The present invention, can anti-stop signal interference using frequently frequency hopping working method；Adjustment of sensitivity is added, increases label
The probability read；By repeating to send select and query orders, prevent label from being leaked because not parsing the two orders
Read；Take inventory every time, largest loop reads 6 and takes turns label, and existing is 3 wheels, so as to greatly reduce collision probability, is not read
Label is generally not because the reason for colliding；Stand-by period is automatically determined by LF, its time is much smaller than 2ms, improves reading
Speed；Therefore, for the foregoing reasons and the above method, the special ultrahigh frequency reader-writer anticollision of electric intelligent meter of the invention
Method, greatly reduces collision probability, and improve reading speed.
In the present invention, Select：Selection tag command；Slot：Time slot；Slot_Count：Timeslot number；QueryRep：
Repeat to inquire about；QueryAdjust：Inquiry adjustment；RN16：16 random numbers；ACK：Confirm order；Q：Take inventory the timeslot number in cycle
Mesh；A：Cycle-index；A_Select：Selection mark cycle number of times；N：Number of tags；C：Collision Number；EPC：Product code.
Claims (4)
1. a kind of anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter, it is characterised in that：Including：
0) the step of read write line is operated with frequency-hopping mode；
1) read write line hair Select orders, for saving the S of all labels the step of taking inventory mark and put A, it is described that the S is saved
Label takes inventory mark；
2) read write line sends Query orders, and the label that A is masked as selecting all S sections to take inventory is taken inventory, the mark that will be received
Sign number N to set to 0, it is 2 to put cycle-index A, and Q is set into Qs, put and select mark cycle number of times A_Select the step of being 1, the Q is
The number of time slot in cycle is taken inventory, the Qs is the initial value of the Q；
3) for Collision Number C to be set to 0, according to Q values, total timeslot number Slot_Count is obtained, and Slot is set to Slot_Count
The step of, the Slot represents time slot；
4) for the RN16 of circular wait label response the step of, if read write line receives label response, read write line hair ACK orders
To the label, then read write line reads EPC, and otherwise one section of read write line circular wait, the RN16 represents 16 random numbers, described
EPC represents product code；
5) read write line hair QueryRep orders, the step of for subtracting 1 by Slot；
If 6) obtained the response of label in the 4th step, but read write line does not interpret EPC, then the step of enter to be about to C plus 1, if
Read write line is interpreted and, then the step of enter to be about to N plus 1；
7) if Slot is not 0, the 4th step is returned to；
If 8) A is not 0, the step of carrying out A and subtract 1, the step of Q plus 1 is carried out if C values are more than the 1/4 of Slot_Count, if C
Less than the 1/8 of Slot_Count, then the step of carrying out Q and subtract 1, read write line sends out QueryAdjust orders, use to value to all of label
Taken inventory in selection S sections and be masked as the label of A and taken inventory, the step of return to 3 step；If A_Select is not 0, A_ is carried out
Select subtracts 1, recalculates Qs values, the step of modification receiving sensitivity, read write line hair Select and Query orders, for selecting
Select the label do not taken inventory to be taken inventory, the step of return to 3 step；
9) for the EPC of N number of label to be issued into host computer the step of.
2. anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter according to claim 1, it is characterised in that：Always
Timeslot number Slot_Count is 2 Q powers.
3. anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter according to claim 1, it is characterised in that：On
State step 4) time of circular wait automatically determines according to LF, and the LF represents low frequency read write line.
4. anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter according to claim 1, it is characterised in that：
In taking inventory every time, largest loop reads 6 and takes turns label.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210017849.0A CN102542231B (en) | 2012-01-19 | 2012-01-19 | A kind of anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter |
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| CN201210017849.0A CN102542231B (en) | 2012-01-19 | 2012-01-19 | A kind of anti-collision method for super-high frequency reader-writer dedicated for electricity intelligent meter |
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| CN102542231B true CN102542231B (en) | 2017-05-31 |
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| CN103903045B (en) * | 2012-12-24 | 2018-01-09 | 中国科学院上海高等研究院 | Mark generation system is taken inventory in the call of ultra-high frequency RFID label chip |
| CN104036210B (en) * | 2014-05-27 | 2017-04-12 | 成都九洲电子信息系统股份有限公司 | Test method of identifying multi-tag performance by UHF reader |
Citations (3)
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|---|---|---|---|---|
| CN101183422A (en) * | 2007-12-20 | 2008-05-21 | 复旦大学 | Random type anticollision algorithm combined Bit-Slot and ID-Slot |
| CN101286192A (en) * | 2008-06-05 | 2008-10-15 | 复旦大学 | Time slot ALOHA anticollision algorithm suitable for dynamic environment |
| CN101620665A (en) * | 2009-08-10 | 2010-01-06 | 成都三零盛安信息系统有限公司 | Ultrahigh frequency passive radio frequency identification reader and frequency hopping method thereof |
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2012
- 2012-01-19 CN CN201210017849.0A patent/CN102542231B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183422A (en) * | 2007-12-20 | 2008-05-21 | 复旦大学 | Random type anticollision algorithm combined Bit-Slot and ID-Slot |
| CN101286192A (en) * | 2008-06-05 | 2008-10-15 | 复旦大学 | Time slot ALOHA anticollision algorithm suitable for dynamic environment |
| CN101620665A (en) * | 2009-08-10 | 2010-01-06 | 成都三零盛安信息系统有限公司 | Ultrahigh frequency passive radio frequency identification reader and frequency hopping method thereof |
Non-Patent Citations (1)
| Title |
|---|
| "面向电力智能表计资产管理的UHF RFID读写器研究";肖勇等;《华东电力》;20120731;第40卷(第7期);全文 * |
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Effective date of registration: 20180528 Address after: 518000 17 floor, block A, CLOU building, North Road, Nanshan District, Xili street, Shenzhen, Guangdong. Patentee after: Shenzhen Hong Lu Technology Co., Ltd. Address before: 518000 5 building, T2 building, Nanshan District science and Technology Park, Shenzhen, Guangdong. Patentee before: Kelu Electronic Science-Technology Co., Ltd., Shenzhen |