CN102479312A - Method for avoiding signal interference in radio frequency identification system - Google Patents
Method for avoiding signal interference in radio frequency identification system Download PDFInfo
- Publication number
- CN102479312A CN102479312A CN2010105594987A CN201010559498A CN102479312A CN 102479312 A CN102479312 A CN 102479312A CN 2010105594987 A CN2010105594987 A CN 2010105594987A CN 201010559498 A CN201010559498 A CN 201010559498A CN 102479312 A CN102479312 A CN 102479312A
- Authority
- CN
- China
- Prior art keywords
- reader
- antenna
- response message
- status
- query request
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to the technical field of automatic identification, particularly relates to a method, a system and a reader for avoiding signal interference in a radio frequency identification system, and is used for solving the problem of signal interference. The main method in the invention comprises the following steps that: a first reader sends a status query request message for querying status of a second antenna to a second reader before triggering a first antenna to execute a tag identification operation, wherein the second antenna belongs to the second reader and is neighboring to the first antenna; after receiving the status query request message, the second reader determines whether the second antenna is in working status currently, and feeds back a status query response message, which indicates that the second antenna is in working status, to the first reader when the second antenna is in the working status currently; after receiving the status query response message, the first reader discards the operation of currently triggering the first antenna to execute the tag identification operation. The method, the system and the reader can be used for solving the problem of signal interference better, and can improve the identification rate quickly and accurately.
Description
Technical field
The present invention relates to the automatic identification technology field, relate in particular to and avoid method, system and the reader that signal disturbs in the radio-frequency recognition system
Background technology
RF identification (Radio Frequency Identification, RFID) technology is a kind of contactless automatic identification technology, and it is through the automatic recognition objective object of radiofrequency signal and obtain related data, and identification work need not manual intervention.RFID is a kind of simple wireless system, comprises two basic elements of character: reader (or reader, read write line) and a lot of transponders (or label).Tradition RFID technical work principle: unique coding of storage in the label of RFID; Get into the zone of action of reader when this label; This label sends faint signal to reader, and reader reads in this signal through antenna that self is inner and convert digital signal into, carries out necessary machining and shaping again; Therefrom demodulate at last complete useful message, accomplish identification and reading and writing operation label.The RFID technology can be discerned high-speed moving object, so the RFID technology is by in the electronic license plate label recognition system.
In the actual use of electronic license plate label recognition system, two readers connect 4 antennas respectively, and this mode can be discerned the vehicle in 8 tracks, and the related news that identification obtains are written in the label.The real work mode of each reader is: 4 antennas carry out work in turn, promptly carry out the operation of tag recognition, read and write.But in actual use, when adjacent two antennas of two adjacent readers send radiofrequency signal simultaneously, can make the radiofrequency signal phase mutual interference of sending, also will directly influence the accuracy that label receives signal, greatly reduce discrimination.
Summary of the invention
The embodiment of the invention provides avoids method, system and the reader that signal disturbs in the radio-frequency recognition system; The border antenna that is used to solve reader is when carrying out the tag recognition operation, and the adjacent boundary antenna of its adjacent reader is worked and problem that the signal that produces disturbs, causes discrimination to reduce simultaneously.
A kind of method of avoiding signal interference in the radio frequency discrimination RFID system, this method comprises:
First reader sends the status query request message that is used to inquire about second antenna condition to second reader before triggering first antenna and carrying out the tag recognition operation, second antenna is on second reader, the antenna adjacent with first antenna;
After second reader receives said status query request message, confirm whether second antenna is current in running order, and feed back the in running order status poll response message of second antenna to first reader when in running order in that second antenna is current;
After first reader receives said status poll response message, abandon the operation that current triggering first antenna is carried out the tag recognition operation.
A kind of radio frequency discrimination RFID system, this system comprises:
First reader is used for before triggering the operation of first antenna execution tag recognition, sending the status query request message that is used to inquire about second antenna condition to second reader; After receiving the status poll response message of second reader feedback, abandon the operation that current triggering first antenna is carried out the tag recognition operation; Second antenna is on second reader, the antenna adjacent with first antenna;
Second reader; Be used for after receiving said status query request message; Confirm whether second antenna is current in running order, and feed back the in running order status poll response message of second antenna to first reader when in running order in that second antenna is current.
A kind of reader, this reader comprises:
The status poll unit is used for before triggering first antenna and carrying out the tag recognition operation, sending the status query request message that is used to inquire about second antenna condition to second reader, and second antenna is on second reader, the antenna adjacent with first antenna;
Processing unit is used for behind the in running order status poll response message of second antenna that receives second reader feedback, abandoning the operation that current triggering first antenna is carried out the tag recognition operation.
The mode of STATUS ENQUIRY message is sent in utilization of the present invention to adjacent reader; Whether the adjacent boundary antenna of confirming adjacent reader is in running order; And, judge whether the reader that sends status query request message can trigger its respective antenna and carry out tag recognition operation according to the status poll response message that the reader that receives STATUS ENQUIRY message feeds back.The border antenna that this method can solve reader is when carrying out the tag recognition operation, and the adjacent boundary antenna of its adjacent reader is worked and problem that the signal that produces disturbs, causes discrimination to reduce simultaneously.
Description of drawings
Fig. 1 is the query script synoptic diagram between the adjacent antenna of adjacent reader provided by the invention;
Inquiry mode synoptic diagram between the adjacent antenna of the adjacent reader that Fig. 2 provides for the embodiment of the invention one;
First reader that Fig. 3 provides for the embodiment of the invention one sends the schematic flow sheet of status query request to second reader;
Second reader that Fig. 4 provides for the embodiment of the invention one feeds back to oneself state the schematic flow sheet of first reader;
First reader that Fig. 5 provides for the embodiment of the invention two receives the operating process synoptic diagram behind the status poll response message of second reader feedback;
Fig. 6 the present invention evades the synoptic diagram of conflict.
Embodiment
First reader is inquired about the duty of the adjacent boundary antenna of the second adjacent reader among the present invention; Second reader feeds back to first reader with the duty of adjacent boundary antenna, and first reader judges whether to trigger the operation of respective antenna execution tag recognition according to the duty of the adjacent boundary antenna of feedback.The method that the embodiment of the invention provides goes for a plurality of readers and connects in the situation of many antennas, is presented in for ease and only relates to two readers that connect two antennas respectively in the specific embodiment.As shown in Figure 1, concrete steps are following:
After step 13, second reader receive said status query request message, confirm that second antenna of second reader is current in running order;
After step 15, first reader receive said status poll response message, abandon the operation that current triggering first antenna is carried out the tag recognition operation.
Below describe with two specific embodiments:
Embodiment one:
As shown in Figure 2, the embodiment of the invention provides the method for avoiding signal to disturb between two readers that connect two antennas respectively between the adjacent boundary antenna.As shown in Figure 3, concrete steps are following:
Table 1 is the antenna configurations table of first reader; Address information and the physical link between second reader and first reader number that antenna sign, second reader of antenna adjacent with second reader on first reader are arranged in this table, said physical link number have uniqueness.If the antenna of the antenna of first reader is identified in the said antenna configurations table, explain that then this antenna is the border antenna, the possibility that has generation signals to disturb.
| The antenna sign | Second reader IP and the port | First reader IP and the port | Physical link number |
| Border antenna 22 | 10.86.20.508087 | 3 | |
| |
10.86.20.498086 | 2 |
Table 1
Second antenna is on second reader, the antenna adjacent with first antenna;
When the second antenna oneself state of second reader is " work ", then be the status poll response message of " hurrying " to the first reader feedback states;
When second reader just sends status query request to first reader; And when this fashion is not received the status poll response message of first reader feedback; When then the second antenna oneself state is for " just having sent inquiry ", compares the IP address of two readers, and carry out following steps:
(1) when the IP address of second reader during greater than the IP address of first reader, then second reader is the status poll response message of " hurrying " to the first reader feedback states;
(2) when the IP address of second reader during less than the IP address of first reader, then second reader is the status poll response message in " spare time " to the first reader feedback states;
When the second antenna oneself state of second reader was " free time ", then second reader was the status poll response message in " spare time " to the first reader feedback states.
Receive the status response message of second reader feedback when first reader after, will make corresponding operation, the detailed process of said operation is following:
When second reader feedback be state when being the status poll response message in " spare time ", first reader triggers the operation that first antenna is carried out tag recognition;
When second reader feedback be state when being the status poll response message of " do ", first reader abandons triggering the operation that first antenna is carried out tag recognition, and accomplishes as follows and operate:
(1) first reader is waited for T after the time, and first reader is initiated status query request to second reader once more;
(2) first readers are received second reader feedback at T2 always in the time state is during for the status poll response message of " hurrying ", and then first reader next antenna of switching to first antenna carries out the corresponding state query manipulation;
When first reader when T1 never receives the status poll response message of second reader feedback in the time; Then first reader is immediately to the second reader retransmission state query messages; When first reader to the multiplicity of the operation of the second reader retransmission state query messages during greater than N1 time; And when also not receiving the status poll response message of second reader feedback, then first reader triggers first antenna and carries out the tag recognition operation.
In addition, the value of time T, T1, T2 and repeating transmission times N 1 can specifically be provided with as follows: the occurrence of T is 5 times since 0 moment to a typical time back and forth an of data packet delivery; Time T 1=20ms; Time T 2=1000ms; Retransmit times N 1=2 time.
The method that the embodiment of the invention provides can well avoid the adjacent antenna of adjacent reader to carry out the signal interference problem that the tag recognition operation may produce constantly simultaneously; And the typical transmission time of udp protocol is 1ms; The speed influence of antenna being carried out the tag recognition operation is very little; After using the method that present embodiment provides, the recognition success rate of the adjacent reader of RFID technology be greatly improved (by before 98% to 99.95%).The speed that antenna is carried out the tag recognition operation does not reduce generally.And the problem that the signal that has solved adjacent antenna between adjacent reader on the whole disturbs is improved discrimination, from the software level with the signal of Lin Dao disturb drop to minimum.
Preferable, it is too much that the antenna on the big reader in IP address is carried out the number of times of tag recognition, can adopt the scheme that provides among the embodiment two.
Embodiment two:
Referring to process shown in Figure 3, the concrete steps of the embodiment of the invention two are following:
Second antenna is on second reader, the antenna adjacent with first antenna;
When the second antenna oneself state of second reader is " work ", be the message of " hurrying " then to the first reader feedback states;
When second reader just sends status query request to first reader; And when this fashion is not received the status poll response message of first reader feedback; When then the second antenna oneself state is for " just having sent inquiry ", compares the IP address of two readers and carry out following steps:
(1) when the IP address of second reader during greater than the IP address of first reader; Second reader is the status poll response message of " hurrying " to the first reader feedback states, and the busy not busy flag of second antenna of second reader this reader self is set to the spare time then; After first reader received this status poll response message, the busy not busy zone bit of first antenna of self was set to hurry;
And open the timer T3 that is provided with in advance; Before this timer expiry; If any side receives that the other side sends in first reader and second reader the status query request message of antenna and the side that receives status query request message have been sent status query request message and do not received the response message to this status query request message to the other side before receiving this status query request message; A side who then receives status query request message at self state flag bit when busy; To the in running order status poll response message of the other side's transmitting antenna; When the state flag bit of self is the spare time, to the not in running order status poll response message of the other side's transmitting antenna; And,
State flag bit to the side self of the in running order status poll response message of the other side's transmitting antenna is set to the spare time, and the state flag bit that receives a side self of the in running order status poll response message of antenna is set to hurry;
Be in not to the other side's transmitting antenna that a side's self of the status poll response message of duty state flag bit is set to do, receive antenna and be in not that a side's self of the status poll response message of duty state flag bit is set to the spare time.
Concrete; Second reader is opened the timer T3 that is provided with in advance; Before this timer expiry; If second reader receives the antenna condition inquiry request message and second reader to second antenna that first reader sends and before receiving this status query request message, has sent status query request message and do not received the response message to this status query request message to first reader; Then second reader sends second antenna to first reader and be in not busy status poll response message, and the busy not busy zone bit of second antenna of self is set to hurry when the busy not busy zone bit of second antenna of self is the spare time; , send second antenna to first reader and be in busy status poll response message when busy at self the busy not busy zone bit of second antenna, and self second antenna busy not busy zone bit be set to the spare time;
First reader receives after said second antenna is in busy status poll response message, and the busy not busy zone bit of first antenna of self is set to hurry; Open the timer that is provided with in advance; Before this timer expiry; If first reader receives the antenna condition inquiry request message and first reader to first antenna that second reader sends and before receiving this status query request message, has sent status query request message and do not received the response message to this status query request message to second reader; Then first reader is when the busy not busy zone bit of first antenna of self is the spare time; Send first antenna to second reader and be in not busy status poll response message;, send first antenna to second reader and be in busy status poll response message when busy at self the busy not busy zone bit of first antenna.
Behind timer expiry; If any side receives that the other side sends in first reader and second reader the status query request message of antenna and the side that receives status query request message have been sent status query request message and do not received the response message to this status query request message to the other side before receiving this status query request message; A side who then receives status query request message judges self to be from reader or main reader with respect to the other side; If from reader; Then be in the not status poll response message of duty to the other side's transmitting antenna; If main reader is then to the in running order status poll response message of the other side's transmitting antenna.
(2) when the IP address of second reader during less than the IP address of first reader; To first reader status poll response message that is " spare time " to main reader feedback states; Busy not busy flag with second antenna of second this reader of reader is set to hurry then; After first reader received the not in running order status poll response message of said second antenna, the busy not busy zone bit of first antenna of self was set to the spare time;
And open the timer T3 that is provided with in advance; Before this timer expiry; If any side receives that the other side sends in first reader and second reader the status query request message of antenna and the side that receives status query request message have been sent status query request message and do not received the response message to this status query request message to the other side before receiving this status query request message; A side who then receives status query request message at self state flag bit when busy; To the in running order status poll response message of the other side's transmitting antenna; When the state flag bit of self is the spare time, to the not in running order status poll response message of the other side's transmitting antenna; And,
State flag bit to the side self of the in running order status poll response message of the other side's transmitting antenna is set to the spare time, and the state flag bit that receives a side self of the in running order status poll response message of antenna is set to hurry;
Be in not to the other side's transmitting antenna that a side's self of the status poll response message of duty state flag bit is set to do, receive antenna and be in not that a side's self of the status poll response message of duty state flag bit is set to the spare time.
Concrete; Second reader is opened the timer T3 that is provided with in advance; Before this timer expiry; If second reader receives the antenna condition inquiry request message and second reader to second antenna that first reader sends and before receiving this status query request message, has sent status query request message and do not received the response message to this status query request message to first reader; Then second reader, sends second antenna to first reader and be in busy status poll response message, and the busy not busy zone bit of second antenna of self is set to the spare time when busy at the busy not busy zone bit of second antenna of self; , send second antenna to first reader and be in not busy status poll response message, and the busy not busy zone bit of second antenna of self is set to hurry when being not busy at the busy not busy zone bit of second antenna of self;
First reader receives after said second antenna is in not busy status poll response message, and the busy not busy zone bit of first antenna of self is set to the spare time; Open the timer that is provided with in advance; Before this timer expiry; If first reader receives the antenna condition inquiry request message and first reader to first antenna that second reader sends and before receiving this status query request message, has sent status query request message and do not received the response message to this status query request message to second reader; Then first reader at the busy not busy zone bit of first antenna of self when busy; Send first antenna to second reader and be in busy status poll response message;, send first antenna to second reader and be in not busy status poll response message when being not busy at the busy not busy zone bit of first antenna of self.
Behind timer expiry; If any side receives that the other side sends in first reader and second reader the status query request message of antenna and the side that receives status query request message have been sent status query request message and do not received the response message to this status query request message to the other side before receiving this status query request message; A side who then receives status query request message judges self to be from reader or main reader with respect to the other side; If from reader; Then be in the not status poll response message of duty to the other side's transmitting antenna; If main reader is then to the in running order status poll response message of the other side's transmitting antenna.
In addition, the timing in timer setting described in step (1), (2) is T3.
This method can be effectively through changing the status information of status indicator position, play the work number of times of the little reader in the work number of times of dividing equally the big reader in IP address and IP address; As shown in Figure 6; When first reader and second reader simultaneously when the other side sends status query requests; Can send state through the size of IP address and be the status response message of " do " or " spare time ", receive that status response message is the operation that the reader in " spare time " can trigger self respective antenna execution tag recognition.
When the second antenna oneself state of second reader was " free time ", then second reader utilized udp protocol to the status poll response message of the first reader feedback states for " spare time ".
After first reader receives the feedback states response message that second reader sends, will make corresponding operation, the detailed process of said operation is following:
The feedback states of sending when second reader is during for the status poll response message in " spare time ", and first reader triggers the operation that first antenna is carried out tag recognition;
The feedback states of sending when second reader is during for the status poll response message of " hurry ", and first reader abandons triggering the operation that first antenna is carried out tag recognition, and accomplishes as follows and operate:
Behind (1) the first reader stand-by period T, first reader is initiated the attitude query requests to second reader once more;
(2) when first reader when T2 receives always in the time that state is the status poll response message of " doing ", then first reader next antenna of switching to first antenna carries out the corresponding state query manipulation;
When first reader when T1 never receives the status poll response message of second reader feedback in the time; Then first reader is immediately to the second reader retransmission state query messages; When the multiplicity of the upright operation to the second reader retransmission state query messages of first reader greater than N1 time; And when also not receiving the status poll response message of second reader feedback, then first reader triggers first antenna and carries out the tag recognition operation.
In addition, the value of time T, T1, T2 and repeating transmission times N 1 can specifically be provided with as follows: the occurrence of T is 5 times since 0 moment to a typical time back and forth an of data packet delivery; Time T 1=20ms; Time T 2=1000ms; Retransmit times N 1=2 time.
The method that the embodiment of the invention provides is worked through the adjacent antenna of avoiding adjacent reader simultaneously, the signal interference problem that may produce in the time of can well avoiding the adjacent antenna of adjacent reader to send signal simultaneously or receive signal simultaneously; And the respective antenna that can avoid the big reader in IP address is carried out the too much respective antenna greater than the little reader in IP address of number of times of tag recognition operation and is carried out the number of times that tag recognition is operated; And the typical transmission time of udp protocol is 1ms; The speed influence of antenna being carried out the tag recognition operation is very little; After using the method that present embodiment provides, the recognition success rate of the adjacent reader of RFID technology be greatly improved (by before 98% to 99.95%).The speed that antenna is carried out the tag recognition operation does not reduce generally.And the problem that the signal that has solved adjacent antenna between adjacent reader on the whole disturbs is improved discrimination, from the software level with the signal of Lin Dao disturb drop to minimum.
Referring to Fig. 2, the embodiment of the invention also provides a kind of radio frequency discrimination RFID system, and this system comprises:
First reader is used for before triggering the operation of first antenna execution tag recognition, sending the status query request message that is used to inquire about second antenna condition to second reader; After receiving the status poll response message of second reader feedback, abandon the operation that current triggering first antenna is carried out the tag recognition operation; Second antenna is on second reader, the antenna adjacent with first antenna;
Second reader; Be used for after receiving said status query request message; Confirm whether second antenna is current in running order, and feed back the in running order status poll response message of second antenna to first reader when in running order in that second antenna is current.
Said first reader is used for:
Before triggering the operation of first antenna execution tag recognition; Be retrieved as the antenna configurations table of self configuration, record address information and the physical link between second reader and first reader number of antenna sign, second reader of antenna adjacent on first reader in this antenna configurations table with second reader;
Whether the sign of judging first antenna is included in the said antenna configurations table; If; Then, send the status query request message that is used to inquire about second antenna condition to second reader according to the address information of second reader and the physical link between second reader and first reader number.
Said second reader is used for:
After receiving said status query request message, be retrieved as the antenna configurations table of self configuration, record address information and the physical link between first reader and second reader number of antenna sign, first reader of antenna adjacent on second reader in this antenna configurations table with first reader;
In said antenna configurations table, search the physical link number of first reader, the antenna of this physical link corresponding antenna sign representative is confirmed as second antenna, and confirm whether second antenna is current in running order.
Said second reader also is used for:
Current when not in running order at definite second antenna, feed back the not in running order status poll response message of second antenna to first reader;
First reader also is used for:
After receiving the not in running order status poll response message of second antenna, trigger first antenna and carry out the tag recognition operation.
Said second reader is used for:
Feed back the not in running order status poll response message of second antenna to first reader before, judge whether self had sent status query request message and do not received the response message to this status query request message to first reader before receiving said status query request message; If judge that then second reader is from reader or main reader with respect to first reader; If from reader, then feed back the not in running order status poll response message of second antenna to first reader.
Said second reader also is used for:
When judgement self is main reader with respect to first reader, feed back the in running order status poll response message of second antenna to first reader.
Said second reader is used for:
The IP address of its own IP address and first reader is compared, if its own IP address, confirms then that second reader is main reader with respect to first reader greater than the IP address of first reader; If its own IP address, confirms then that second reader is from reader with respect to first reader less than the IP address of first reader.
The embodiment of the invention also provides a kind of reader, and this reader comprises:
The status poll unit is used for before triggering first antenna and carrying out the tag recognition operation, sending the status query request message that is used to inquire about second antenna condition to second reader, and second antenna is on second reader, the antenna adjacent with first antenna;
Processing unit is used for behind the in running order status poll response message of second antenna that receives second reader feedback, abandoning the operation that current triggering first antenna is carried out the tag recognition operation.
Said reader also comprises:
The inquiry judging unit; Be used in the status poll unit before the transmission of second reader is used to inquire about the status query request message of second antenna condition; Be retrieved as the antenna configurations table of self configuration, record address information and the physical link between second reader and first reader number of antenna sign, second reader of antenna adjacent on first reader in this antenna configurations table with second reader; Whether the sign of judging first antenna is included in the said antenna configurations table;
Said status poll unit is used for:
When the sign of inquiry judging unit judges first antenna is included in the said antenna configurations table; According to the address information of second reader and the physical link between second reader and first reader number, send the status query request message that is used to inquire about second antenna condition to second reader.
Said processing unit also is used for:
Behind the not in running order status poll response message of second antenna that receives second reader feedback, trigger first antenna and carry out the tag recognition operation.
Said reader also comprises:
The feedback of status unit; Be used for after receiving the antenna condition inquiry request message that second reader sends first antenna; Confirm whether first antenna is current in running order, and feed back the in running order status poll response message of first antenna to second reader when in running order in that first antenna is current.
Said reader also comprises:
Antenna is confirmed the unit; Be used to be retrieved as the antenna configurations table of self configuration, record address information and the physical link between first reader and second reader number of antenna sign, second reader of antenna adjacent on second reader in this antenna configurations table with first reader;
Said feedback of status unit is used for:
After receiving the antenna condition inquiry request message that second reader sends to first antenna; In said antenna configurations table, search the physical link number of second reader; The antenna of the antenna of this physical link corresponding antenna sign representative is confirmed as first antenna; And confirm whether first antenna is current in running order, and feed back the in running order status poll response message of first antenna to second reader when in running order in that first antenna is current.
In sum, beneficial effect of the present invention is:
In the scheme that the embodiment of the invention provides, the duty of the adjacent boundary antenna through inquiring about adjacent reader determines whether the current antenna of current reader carries out the operation of tag recognition, and this method can effectively be avoided the interference problem of homogenous frequency signal.Simultaneously, owing to used udp protocol and master-slave strategy, on time and speed, also be greatly improved.Therefore, method and apparatus provided by the invention is obtaining very big progress aspect time, discrimination and the interference of reduction messenger.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disk memory, CD-ROM, optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
The present invention is that reference is described according to the process flow diagram and/or the block scheme of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block scheme and/or square frame and process flow diagram and/or the block scheme and/or the combination of square frame.Can provide these computer program instructions to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computing machine or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame.
These computer program instructions also can be loaded on computing machine or other programmable data processing device; Make on computing machine or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computing machine or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic inventive concept could of cicada, then can make other change and modification to these embodiment.So accompanying claims is intended to be interpreted as all changes and the modification that comprises preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. avoid the method that signal disturbs in the radio frequency discrimination RFID system for one kind, it is characterized in that this method comprises:
First reader sends the status query request message that is used to inquire about second antenna condition to second reader before triggering first antenna and carrying out the tag recognition operation, second antenna is on second reader, the antenna adjacent with first antenna;
After second reader receives said status query request message, confirm whether second antenna is current in running order, and feed back the in running order status poll response message of second antenna to first reader when in running order in that second antenna is current;
After first reader receives said status poll response message, abandon the operation that current triggering first antenna is carried out the tag recognition operation.
2. the method for claim 1 is characterized in that, before being used to inquire about the status query request message of second antenna condition to the transmission of second reader, this method further comprises:
First reader is retrieved as the antenna configurations table of self configuration, records address information and the physical link between second reader and first reader number of antenna sign, second reader of antenna adjacent with second reader on first reader in this antenna configurations table; Whether the sign of judging first antenna is included in the said antenna configurations table;
Saidly send the status query request message be used to inquire about second antenna condition to second reader and comprise:
When first reader is included in the said antenna configurations table in the sign of judging first antenna; According to the address information of second reader and the physical link between second reader and first reader number, send the status query request message that is used to inquire about second antenna condition to second reader.
3. the method for claim 1 is characterized in that, after second reader receives said status query request message and confirm second antenna current whether in running order before, this method further comprises:
Second reader is retrieved as the antenna configurations table of self configuration, records address information and the physical link between first reader and second reader number of antenna sign, first reader of antenna adjacent with first reader on second reader in this antenna configurations table;
Second reader is searched the physical link number of first reader in said antenna configurations table, the antenna of this physical link information corresponding antenna sign representative is confirmed as second antenna.
4. the method for claim 1 is characterized in that, confirms that at second reader second antenna is current when not in running order, and this method further comprises:
Second reader feeds back the not in running order status poll response message of second antenna to first reader;
After first reader receives the not in running order status poll response message of second antenna, trigger first antenna and carry out the tag recognition operation.
5. method as claimed in claim 4 is characterized in that, before first reader fed back the not in running order status poll response message of second antenna, this method further comprised at second reader:
Second reader is judged and self whether before receiving said status query request message, has been sent status query request message to first reader, and do not receive the response message to this status query request message; If judge that then second reader is from reader or main reader with respect to first reader;
Said second reader feeds back the not in running order status poll response message of second antenna to first reader and comprises:
Second reader is judging that self is during from reader with respect to first reader, feeds back the not in running order status poll response message of second antenna to first reader.
6. method as claimed in claim 5 is characterized in that, when the judgement of second reader self was main reader with respect to first reader, this method further comprised:
Second reader feeds back the in running order status poll response message of second antenna to first reader.
7. method as claimed in claim 5 is characterized in that, said judgement second reader is to comprise from reader or main reader with respect to first reader:
Second reader compares the IP address of its own IP address and first reader, if its own IP address, confirms then that second reader is main reader with respect to first reader greater than the IP address of first reader; If its own IP address, confirms then that second reader is from reader with respect to first reader less than the IP address of first reader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105594987A CN102479312A (en) | 2010-11-23 | 2010-11-23 | Method for avoiding signal interference in radio frequency identification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105594987A CN102479312A (en) | 2010-11-23 | 2010-11-23 | Method for avoiding signal interference in radio frequency identification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102479312A true CN102479312A (en) | 2012-05-30 |
Family
ID=46091952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105594987A Pending CN102479312A (en) | 2010-11-23 | 2010-11-23 | Method for avoiding signal interference in radio frequency identification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102479312A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106778420A (en) * | 2016-12-22 | 2017-05-31 | 江苏本能科技有限公司 | Multi-channel rf identifying device interlock method and system |
| CN109255273A (en) * | 2018-08-31 | 2019-01-22 | 连云港伍江数码科技有限公司 | Storage equipment, storage equipment control method, device, refrigerating equipment and system |
| CN111953388A (en) * | 2020-10-19 | 2020-11-17 | 深圳市力博得科技有限公司 | Control method, system, device and medium for preventing near field transmission misidentification |
| CN112399465A (en) * | 2019-08-16 | 2021-02-23 | 华为技术有限公司 | Indication method and device for state of antenna panel |
-
2010
- 2010-11-23 CN CN2010105594987A patent/CN102479312A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106778420A (en) * | 2016-12-22 | 2017-05-31 | 江苏本能科技有限公司 | Multi-channel rf identifying device interlock method and system |
| CN106778420B (en) * | 2016-12-22 | 2020-11-03 | 江苏本能科技有限公司 | Multi-channel radio frequency identification device linkage method and system |
| CN109255273A (en) * | 2018-08-31 | 2019-01-22 | 连云港伍江数码科技有限公司 | Storage equipment, storage equipment control method, device, refrigerating equipment and system |
| CN112399465A (en) * | 2019-08-16 | 2021-02-23 | 华为技术有限公司 | Indication method and device for state of antenna panel |
| CN112399465B (en) * | 2019-08-16 | 2022-11-11 | 华为技术有限公司 | Method and device for indicating state of antenna panel |
| CN111953388A (en) * | 2020-10-19 | 2020-11-17 | 深圳市力博得科技有限公司 | Control method, system, device and medium for preventing near field transmission misidentification |
| CN111953388B (en) * | 2020-10-19 | 2021-02-09 | 深圳市力博得科技有限公司 | Control method, system, device and medium for preventing near field transmission misidentification |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9754143B2 (en) | Radio frequency identification readers, methods and computer program products for adjusting a query command slot-counter parameter Q | |
| US8477016B2 (en) | Method for identifying tags using adaptive binary tree splitting technique in RFID system and RFID system therefore | |
| CN101901360B (en) | Networked radio frequency identification device (RFID) reader and anti-collision method thereof | |
| CN104135339A (en) | Bluetooth low-power-consumption communication method, Bluetooth equipment and system | |
| CN102479312A (en) | Method for avoiding signal interference in radio frequency identification system | |
| CN102298684B (en) | Method, system and reader for avoiding signal interference in radial frequency identification system | |
| EP2183699B1 (en) | A method and reader to conduct a label query in a radio frequency identification system | |
| EP1851674A1 (en) | Communication set up between wire-less devices | |
| CN103927506B (en) | RIFD anti-collision method based on dynamic timeslot conflict tracking tree | |
| JP2007026465A (en) | Method for inventorying data carrier | |
| WO2012022082A1 (en) | Method of radio frequency identification and reader | |
| CN107506674B (en) | ALOHA anti-collision method based on time slot prediction | |
| CN114841180A (en) | Label inventory method and related equipment | |
| CN103679096A (en) | Optimized RFID anti-collision method | |
| CN101231686A (en) | Method for recognizing contrary collision of inquiry tree radio frequency labels of amalgamation database | |
| CN101436243B (en) | Conflict solution method for recognizing multiple radio frequency labels | |
| CN103489016B (en) | RFID anti-collision read-write device and control method thereof | |
| CN108021957B (en) | Anti-collision method and system, readable storage medium and card reading device | |
| CN101739536A (en) | Method for reading and writing tags in radio-frequency recognition system and reader-writer | |
| KR101074061B1 (en) | Method for recognizing rfid tag of the reader | |
| CN104244456A (en) | Near field communication device activation method, near field communication primary device and target device | |
| CN201425747Y (en) | RFID device for identifying dynamically changing objects | |
| WO2024078613A1 (en) | Label inventory method, apparatus, node and storage medium | |
| CN106127096A (en) | The collision-proof method of a kind of RF identification, system, and reader and label | |
| KR20120133247A (en) | RFID tag collection system using tag numbering and the method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120530 |