CN101685494B - Control method of radio frequency identification tag and radio frequency identification system using same - Google Patents
Control method of radio frequency identification tag and radio frequency identification system using same Download PDFInfo
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- CN101685494B CN101685494B CN200810211795.5A CN200810211795A CN101685494B CN 101685494 B CN101685494 B CN 101685494B CN 200810211795 A CN200810211795 A CN 200810211795A CN 101685494 B CN101685494 B CN 101685494B
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Abstract
The invention discloses a control method of a radio frequency identification tag and a radio frequency identification system using the same, which enable the (radio frequency identification device) RFID tag to be read without re-executing all processes. The control method of the radio frequency identification tag comprises the following steps: (a) enabling at least one RFID tag to enter a ready state; (b) enabling the first RFID tag in the at least one RFID tag to enter a readable state, and providing a first identification code to the first RFID tag; and (c) enabling the first RFID tag to enter a standby state from the readable state. The radio frequency identification system comprises at least one RFID tag and one RFID reader, wherein the RFID reader is used for enabling at least one RFID tag to enter the ready state, enabling the first RFID tag in the at least one RFID tag to enter the readable state, providing the first identification code to the first RFID tag, and enabling the first RFID tag to enter the standby state from the readable state.
Description
Technical field
The present invention relates to the control method of a kind of RFID tag (RFID tag) and use the radio-frequency recognition system of the method, the radio-frequency recognition system of the control method of the RFID tag under espespecially a kind of RFID C1G2 (Class1, Generation2) standard and use the method.
Background technology
Fig. 1 has illustrated in known techniques, the schematic diagram of the RFID tag state flow process under RFID C1G2 (Class1, Generation2) standard, and it is be subject to the control of a RFID reader (reader) and enter different states.As shown in Figure 1, this schematic diagram comprises various states: prepare (Ready), arbitration (Arbitrate), reply (Reply), inform (Acknowledged), open (Open), maintain secrecy (Secured) and elimination (Killed).In readiness, if the RFID label of RFID label passive type, it is accepted the signal that RFID reader gives and produces electric power.Then receive the instruction of RFID reader and enter arbitrate state.Then, must be through consuming time and complicated screening (singulation) program, just allow that a RFID label is selected and enters other state after recoil state, other RFID label is awaited orders in arbitrate state.In the state of informing, RFID reader gives RFID label one identification code (being called Handle in this example), using as after the use of identification during access data.
Generally speaking, aforesaid preparation, arbitration, to reply, inform be in order to prepare reading RFID label.And just entered the state of can read after RFID label enters opening, confidential state.Under open state, in a RFID label, stored data only have part to be read.And under confidential state, RFID reader need just can, compared with reading more data under open state, more namely just can be read through the data of confidential treatment by the approval of a RFID label.And once RFID label enters after elimination state, just can maintain this state always, and without being read again.And as shown in Figure 1, RFID label can directly skip over open state from the state of informing and arrive confidential state.Or RFID label also can directly skip over confidential state from open state and arrive elimination state.The detailed description of the RFID label access flow process under other RFID C1G2 standard is by these those skilled in the art are known, therefore do not repeat them here.
But, if according to such flow process, in the same circulation (round) of reading certain a collection of RFID label, just the RFID label being read can not be read again, unless whole flow process restarts once again; Or, when wherein the access of a RFID label needs the data of another RFID label, must first execute all flow processs to read a wherein RFID label, then the data that read are kept in to other memory storage, re-execute once all flow processs to read the data of another device, suitable is not convenient again.
Summary of the invention
The control method that technical matters to be solved by this invention is to provide a kind of RFID label with and related system, make RFID label can not must re-execute all flow processs and just can be read, make RFID label more flexible on data read.
In order to solve above technical matters, the invention provides following technical scheme:
The control method that the invention provides a kind of RFID tag, comprises: (a) make at least one RFID label enter a readiness; (b) make one the one RFID label at least one RFID label enter one and can read state, and give RFID label one first identification code; And (c) make a RFID label enter a holding state by the state of can read.
The present invention separately provides a kind of radio-frequency recognition system that uses said method, comprises at least one RFID label; An and RFID reader, be used for making at least one RFID label to enter a readiness, and make one the one RFID label at least one RFID label enter one to can read state, and give RFID label one first identification code, and make a RFID label enter a holding state by the state of can read.
The radio-frequency recognition system of the control method of the RFID tag that the present invention adopts and use the method, can make RFID label in a holding state, and tell at any time when needed, overcome same RFID label in prior art and read the inconvenience that could again be accessed in circulation in the next one, made RFID label more flexible on data read.
Accompanying drawing explanation
Fig. 1 has illustrated in known techniques, the RFID label access schematic diagram under RFID C1G2 standard.
Fig. 2 has illustrated according to one embodiment of the invention, adds the schematic diagram of a holding state under RFID C1G2 standard.
Fig. 3 has illustrated the process flow diagram of controlling according to an embodiment of the invention the part steps of RFID stamp methods.
Fig. 4 has illustrated the process flow diagram of controlling according to an embodiment of the invention the part steps of RFID stamp methods.
Embodiment
Fig. 2 has illustrated according to one embodiment of the invention, adds the schematic diagram of a holding state under RFID C1G2 standard.For make diagram comparatively succinctly understandable, only illustrated part flow process, please jointly with reference to figure 1 to more understand the present invention.As shown in Figure 2, RFID label, entering after the state of can read (open or secret), can enter a holding state.And not only a RFID label can enter holding state.Under this holding state, RFID label can be given an identification code ID who is different from identification code Handle.The place that identification code Handle is different with ID is: identification code Handle is given at the state of informing, in all RFID labels of identification, which is by the RFID label being read; And identification code ID is in order to all RFID labels in holding state of identification.For instance, have five RFID labels and enter holding state, just can give respectively this five RFID labels 1,2,3,4,5 identification code ID, so RFID label can clearly can not be made a mistake by identification when holding state is told.It is noted that, not necessarily to give RFID tag recognition code ID, giving RFID tag recognition code ID can more successfully be chosen in order to ensure the RFID label that is positioned at holding state, if and do not use identification code ID, only utilizing identification code Handle to carry out all RFID labels in holding state of identification is also feasible mode.But utilizing alternate manner identification RFID label, it for example utilizes identification code ID and identification code Handle also within the scope of the present invention simultaneously, more can guarantee the correctness of identification.
The RFID label that enters holding state also can be always in holding state, and state just can the get back to open or confidential state (that is directly getting back to the state of can read) such as from holding state is told, RFID label can not must enter preparation, arbitration in Fig. 1 again, reply, inform and being directly read.And RFID label, from holding state leaves, not necessarily will be got back to open or confidential state, it can receive an instruction (being called SNAK instruction in this example) and directly get back to readiness.
By the above-mentioned practice, can avoid in known techniques, the data that read RFID label just must re-execute once the shortcoming of all flow processs.Under will explain as example to read two RFID labels so that function mode of the present invention can clearerly present.First, a RFID label (being passive type in this example) provides electric power to enter readiness by a RFID reader.Then through arbitrating, reply, inform after state, enter open or confidential state (entering the state of can read) after being given identification code Handle.Then, the now if desired data of the 2nd RFID label, first allow a RFID label enter holding state.As mentioned above, when making a RFID label enter holding state, RFID reader can give another identification code ID that a RFID label is different from identification code Handle, with the use as the identification of RFID label under holding state; Certainly RFID reader also can not give a RFID tag recognition code ID, and only with identification code Handle, reaches identical object.
The one RFID label enters after holding state, and RFID reader makes the 2nd RFID label be read after data by states such as preparing, arbitrate, reply, inform, be open or secret with known flow process again, allows the 2nd RFID label enter holding state.And then a RFID label is recalled to open or confidential state from holding state, and read the data of a RFID label.Therefore, by above-mentioned method, visual demand and make one or more RFID label enter holding state, and increase the application that the data of RFID label read.
Fig. 3 and Fig. 4 have illustrated the process flow diagram of controlling according to an embodiment of the invention the part steps of the method for RFID label.It is noted that, these steps are only in order to illustrate, not in order to limit the present invention.Process flow diagram shown in Fig. 3 is that supposition RFID label is positioned at situation open or that then confidential state wants to enter holding state, and it comprises:
RFID label is positioned at open or confidential state.
Record RFID label is arranged in open or confidential state (that is which sub-state record RFID label is arranged in), so that RFID label can be got back to original state leaving after holding state.
Receive instruction.
Judge whether this instruction is a signal instruction.Signal instruction is used for RFID label to recall the state of can read (open or confidential state) from holding state.Therefore, if RFID label be not to receive this type of instruction in holding state in the situation that, represent that RFID label receives inappropriate instruction, therefore can force RFID label to get back to readiness.If not step 309 is arrived in signal instruction.
Determine whether holding state instruction, if arrive step 311; To step 319, to follow C1G2 standard according to received instruction, move if not.
Confirm that whether identification code Handle contained in instruction is consistent with the identification code Handle of RFID label.That is, confirm whether instruction is received by correct RFID label.To step 317, get back to readiness if not, if arrive step 313.
Give identification code ID.As mentioned above, this step is step optionally, can determine according to the actual requirements to want to carry out, to increase the elasticity of design.
RFID label enters holding state.
RFID label enters readiness.
Follow other standard action.
Process flow diagram shown in Fig. 4 is that supposition RFID label is arranged in holding state, then wants to leave the situation of holding state, and it comprises:
RFID label is arranged in holding state.
RFID label receives instruction.
Does is instruction a SNAK instruction? that is, allow RFID label leave holding state and to get back to readiness? if arrive step 406, get back to readiness, arrive if not step 407.
Get back to readiness.
Whether decision instruction is holding state instruction, if represent that RFID label should not leave holding state, therefore can enter step 408, continues to maintain holding state.Arrive if not step 409.
RFID label enters (or maintaining) holding state.
Determine whether a signal instruction (signal instruction is used for RFID label to recall from holding state the state of can read).If arrive step 411, arrive if not step 408.
Confirm that whether identification code Handle contained in instruction is consistent with the identification code Handle of RFID label, that is confirm whether instruction is received by correct RFID label.If arrive step 413, arrive if not step 408.
Confirm that whether identification code ID contained in instruction is consistent with the identification code ID of RFID label; If arrive step 415, arrive if not step 408.Similarly, this step is step optionally, carries out with step 313 collocation.Also, time, if make RFID label give its identification code ID from can read when state enters holding state, this step just must be carried out,
Judge previously whether the state of record was open state, if arrive step 417, arrived if not step 419.
RFID label enters open state.
RFID label enters confidential state.
It is noted that, although above-mentioned actual example explains with RFID C1G2 standard, also can apply to other standard, it is not de-scope of the present invention also.By the above embodiments, RFID label is given an extra holding state in can read under state, and enter when needed this holding state, so at single, read in circulation, after some specific RFID labels are accessed, even if there has been other RFID label to be accessed, do not need again to pass through consuming time and complicated screening sequence, just this specific RFID label of access again yet yet.So can remove from known in same RFID label in the next one, read the inconvenience that could again be accessed in circulation, therefore the present invention can make RFID label more flexible in data access.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the claims in the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (12)
1. a control method for RFID tag, is characterized in that, it comprises:
(a) make at least one RFID tag enter a readiness;
(b) make one first RFID tag in this at least one RFID tag enter one and can read state, and give this first RFID tag one first identification code;
(c) make this first RFID tag can read state and enter a holding state by this, give one second identification code that this first RFID tag is different from this first identification code;
(d) according to this second identification code, find out this first RFID tag that is positioned at this holding state; And
(e) make this first RFID tag leave this holding state and must not carry out again this (a) step and just can directly enter this and can read state.
2. the control method of RFID tag as claimed in claim 1, is characterized in that, should (d) step comprise:
(d1) according to this first identification code, find out this first RFID tag that is positioned at this holding state.
3. the control method of RFID tag as claimed in claim 1, is characterized in that, should (d) step comprise:
(d1) make one second RFID tag in this at least one RFID tag enter this and can read state.
4. the control method of RFID tag as claimed in claim 3, is characterized in that, should (d) step comprise:
(d2) make this second RFID tag can read state and enter this holding state by this.
5. the control method of RFID tag as claimed in claim 1, is characterized in that, wherein this can read state and includes plural number sub-state, and the method more comprises:
(f) record this and can read this sub-state of state; And
(g) make this first RFID tag leave this holding state and get back to that step (f) records this can read this sub-state of state.
6. the control method of RFID tag as claimed in claim 1, is characterized in that, is wherein somebody's turn to do (a) step and should (b) step follows radio-frequency (RF) identification C1G2 standard.
7. a radio-frequency recognition system, is characterized in that, it comprises:
At least one RFID tag; And
One RFID reader, be used for making at least one RFID tag to enter a readiness, and make one first RFID tag in this at least one RFID tag enter one to can read state, and give this first RFID tag one first identification code and be different from one second identification code of this first identification code, and make this first RFID tag can read state and enter a holding state by this; Wherein this RFID reader more finds out according to this second identification code this first RFID tag that is positioned at this holding state, and this first RFID tag is left must not enter after this holding state this readiness just can directly enter this to can read state again.
8. radio-frequency recognition system as claimed in claim 7, is characterized in that, wherein this RFID reader more finds out according to this first identification code this first RFID tag that is positioned at this holding state.
9. radio-frequency recognition system as claimed in claim 7, it is characterized in that, wherein this can read state and includes plural number sub-state, and this RFID tag enters this and can read after state and enter this sub-state that records this before this holding state and can read state, and when this RFID reader makes this first RFID tag leave this holding state, make this first RFID tag get back to recorded this to can read this sub-state of state.
10. radio-frequency recognition system as claimed in claim 7, it is characterized in that, wherein this RFID reader more enables to be different from this at least one RFID tag one second RFID tag of the first RFID tag, makes this second RFID tag enter this and can read state.
11. radio-frequency recognition systems as claimed in claim 10, is characterized in that, wherein this RFID reader more makes this second RFID tag be can read state and entered this holding state by this.
12. radio-frequency recognition systems as claimed in claim 7, is characterized in that, it follows radio-frequency (RF) identification C1G2 standard.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810211795.5A CN101685494B (en) | 2008-09-25 | 2008-09-25 | Control method of radio frequency identification tag and radio frequency identification system using same |
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| CN200810211795.5A CN101685494B (en) | 2008-09-25 | 2008-09-25 | Control method of radio frequency identification tag and radio frequency identification system using same |
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| CN102314585A (en) * | 2011-07-22 | 2012-01-11 | 上海聚星仪器有限公司 | Method suitable for testing secure communication of radio frequency identification tag |
| CN102542227B (en) * | 2011-12-26 | 2013-12-25 | 西北工业大学 | Built-up jig assembling detection method based on radio frequency identification devices (RFID) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1934575A (en) * | 2004-02-06 | 2007-03-21 | Zih公司 | Rfid group selection method |
| CN101089872A (en) * | 2006-06-13 | 2007-12-19 | 中兴通讯股份有限公司 | Communication method for reader and tag in RFID system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI319161B (en) * | 2006-10-05 | 2010-01-01 | Mstar Semiconductor Inc | Radio frequency identification chip and setting/identifying method applied to the same |
| CN101236594A (en) * | 2008-01-25 | 2008-08-06 | 北京华海隆科贸有限公司 | Rapid response long distance recognition radio frequency label |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1934575A (en) * | 2004-02-06 | 2007-03-21 | Zih公司 | Rfid group selection method |
| CN101089872A (en) * | 2006-06-13 | 2007-12-19 | 中兴通讯股份有限公司 | Communication method for reader and tag in RFID system |
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