CN102129541B - Radio frequency identification system, reader-writer, tag and communication method - Google Patents
Radio frequency identification system, reader-writer, tag and communication method Download PDFInfo
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- CN102129541B CN102129541B CN201110048786.0A CN201110048786A CN102129541B CN 102129541 B CN102129541 B CN 102129541B CN 201110048786 A CN201110048786 A CN 201110048786A CN 102129541 B CN102129541 B CN 102129541B
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Abstract
The embodiment of the invention provides a radio frequency identification system, a reader-writer, a tag and a communication method. The communication method comprises the following steps of: detecting the tag entering a radio frequency electromagnetic field, wherein if a prestored own radio quiescence command of the tag entering the radio frequency electromagnetic field is nonzero, the tag enters a radio quiescence state; and sending a nonzero wakening command to the tag to waken the tag so that the tag is switched from the radio quiescence state to a ready state, wherein the values of the radio quiescence command and the nonzero wakening command are equal. In the embodiment of the invention, the tag in the radio quiescence state can be wakened to be switched from the radio quiescence state to the ready state only when receiving the nonzero wakening command so as to execute a subsequent checking process to ensure that the only identifying information of the tag is protected by adopting the nonzero wakening command; and the tag can not be checked without an accurate wakening command, and the only identifying information of the tag can not be acquired, therefore, the access safety is enhanced and the illegal communication is effectively resisted.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of radio-frequency recognition system, read write line, label and communication means.
Background technology
Passive radio frequency identification (RFID, Radio Frequency Identify) system comprises label and read write line.REID is a kind of contactless automatic identification technology, and it automatically identifies destination object by radiofrequency signal and obtains related data, and the work of identification need not manual intervention, can work in various rugged surroundings.RFID technique identifiable design high-speed moving object also can identify multiple label simultaneously, swift and convenient to operate.Its principle of work is as follows:
Read write line send information to one or more label by modulated RF carrier signal, and label obtains working power energy by the RF electromagnetic field of read write line; Label information is encoded according to certain coded system; Label transmits information by the amplitude of backscattered modulation radio-frequency carrier or phase place; Read write line is by sending the RF carrier wave of a non-modulated and the backscattered reply intercepting label obtains the information of label; Read write line is to label information decoding; Communication between read write line and label is semiduplex.
Passive label is primarily of formations such as antenna system, radio frequency unit, logical block and storeies.The energy part that it obtains from read write line is consumed by internal circuit, and another part is gone out by antenna transmission.The answer signal of label, on the high frequency carrier that sent to read write line by modulates baseband signals, is wirelessly sent to read write line.In rfid system, be carry out logical process with state machine in the logical block of label, make label correctly can carry out processing response after receiving read write line order.Label has different responses to various order under different states, and this relies on tag state machine to process, and tag state is confidential can ensure that label adapts to orders all in air protocol, there will not be state machine lock-up condition simultaneously.
Fig. 1 shows the tag state transition diagram in the EPC agreement of prior art, mainly comprises preparation, judgement, response, confirmation, opening, encrypts and kill state.As shown in Figure 1, the transfer of its state is as follows:
Standby condition be not both killed does not have currently participating in one and take turns the label powered on checked yet for being represented those.After entering into a radio frequency active region, if label is not killed, then standby condition will be entered.Label can keep standby condition until it receives querying command always.Label can produce a random number, and by this random number stored in time slot counter, if this random number is non-vanishing, then label proceeds to judgement state, if random number is zero, then label proceeds to response status.If label is in non-any one state of killing state, when again obtaining energy after a power failure, enter standby condition.
Judgement state is for representing that those participate in current checking in round, but the part label of time slot counter value non-zero.The label being in judgement state can reduce the value of time slot counter at every turn after receiving repetition querying command, and when time slot counter arrives 0 time, label proceeds to response status.Otherwise judgement state will be remained on.
A RN16 can be reflected after label enters into response status.If label receives an effective acknowledgement command, it will proceed to judgement state, return unique identifying information.If label does not receive acknowledgement command, or receive invalid acknowledgement command, then proceed to judgement state.
The label being in acknowledgement state can be transformed into all states except the state of killing, and this depends on the instruction received.Be in the label of acknowledgement state, if its access code non-zero, will open state be proceeded to when receiving random number and obtaining instruction, send a new RN16, read write line just can use this RN16 in order afterwards, and label also can use this RN16 in reply afterwards.It is all visit orders that can perform except locked that label is in open state.Label can be transformed into all states except acknowledgement state according to the order received when being in open state.
Be in the label of acknowledgement state, if its access code is zero, then receive again apply for RN order after proceed to encrypted state, send a new RN16, read write line just can use this RN16 in order afterwards, and label also can use this RN16 in reply afterwards.Being in the label of open state, if access code non-zero, being then transferred to encrypted state when receiving effective visit order, and the identical RN16 launched when acknowledgement state is transferred to open state before remain.The label being in encrypted state can perform all visit orders.The label being in encrypted state can be transferred to states all except open and acknowledgement state according to the order received.
Be in label that is open or encrypted state, receive one to kill with effective non-zero password and effective RN16 kill instruction after can be transferred to the state of killing.Kill and make a permanent incapacitation of label.Once enter into the state of killing, label can notify that read write line kills successful operation, and all can not respond read write line later.Kill label and all can remain on the state of killing in any environment, more also can immediately enter into kill state after powering on next time.It is irreversible for killing operation.
Fig. 2 shows the tag state transition diagram in the ISO18000-6B agreement of prior art, mainly comprises power-off, preparation, identification, exchanges data state.As shown in Figure 2, the transfer of its state is as follows:
Time label is not powered, be in off-position; Standby condition is entered after label powers on; After the label of standby condition receives select command, enter status recognition, carry out tag-collision identification; Receive read command to enter exchanges data state and carry out data access; If the label be correctly validated at status recognition receives data read command, then enter exchanges data state and carry out data access; After having accessed, label returns standby condition.
Inventor finds that prior art at least exists following problem: existing radio-frequency recognition system does not have good security mechanism, effectively cannot resist illegal communication.
Summary of the invention
The object of the present invention is to provide a kind of radio-frequency recognition system, read write line, label and communication means, with the problem that the security solving prior art existence is poor.
On the one hand, embodiments provide a kind of communication means of radio-frequency recognition system, described method comprises: detect the label entering radio frequency electromagnetic field; Wherein, if the radio listening silence password non-zero that the label itself entering radio frequency electromagnetic field prestores, described label enters radio listening silence state; What send non-zero to described label wakes password up to wake described label up, makes described label proceed to ready state from radio listening silence state, described in wake the value of password up consistent with the radio listening silence password of label itself.
On the other hand, embodiments provide the communication means of another kind of radio-frequency recognition system, described method comprises: after the label prestoring the radio listening silence password of non-zero enters radio frequency electromagnetic field, enter radio listening silence state; What receive the non-zero that described read write line sends wakes password up, proceeds to ready state from radio listening silence state, described in wake password up the radio listening silence password that itself prestores of value and label consistent.
Another aspect, embodiments provides the read write line in a kind of radio-frequency recognition system, and described read write line comprises: detecting unit, for detecting the label entering radio frequency electromagnetic field; Transmitting element, wakes password up to wake described label up for what send non-zero to described label, makes described label proceed to ready state from radio listening silence state, wherein, described in wake password up the radio listening silence password that itself prestores of value and label consistent.
Another aspect, embodiments provide the label in a kind of radio-frequency recognition system, described label itself prestores the radio listening silence password of non-zero, radio listening silence state is in when described label enters radio frequency electromagnetic field, wherein, described label comprises: receiving element, wakes password up for what receive non-zero that read write line sends, described in wake password up the radio listening silence password that itself prestores of value and label consistent; State conversion unit, for waking password up according to non-zero, makes described label proceed to ready state from radio listening silence state.
Another aspect, embodiments provides a kind of radio-frequency recognition system, and described system comprises: label and read write line, described read write line, for detecting the label entering radio frequency electromagnetic field; What send non-zero to described label wakes password up to wake described label up, makes described label proceed to ready state from radio listening silence state; Wherein, the radio listening silence password that the value and label of waking password described in up itself prestore is consistent; Described label, after entering radio frequency electromagnetic field, if the radio listening silence password non-zero itself prestored, described label enters radio listening silence state; And when receive this read write line send the non-zero consistent with the value of described radio listening silence password wake password up time, be waken up to proceed to ready state from radio listening silence state.
The technique scheme that the embodiment of the present invention provides; after label enters radio frequency electromagnetic field; if the radio listening silence password non-zero itself prestored; described label enters radio listening silence state; when being in radio listening silence state, label does not respond and checks order, thus the unique identifying information effectively protecting label is illegally accessed.And the label being in radio listening silence state only have when receive effectively wake password up time; just be waken up to proceed to ready state from radio listening silence state; follow-up process is checked so that perform; achieve like this and adopt radio listening silence password to protect the unique identifying information of label; not corresponding or match wake password up; just cannot check label; thus the unique identifying information of label cannot be obtained; which enhance the security of access, effectively can resist illegal communication.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, introduce doing one to the accompanying drawing used required in embodiment or description of the prior art simply below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the tag state transition diagram in the EPC agreement of prior art;
Fig. 2 is the tag state transition diagram in the ISO18000-6B agreement of prior art;
Fig. 3 is the process flow diagram of the communication means of a kind of radio-frequency recognition system of the embodiment of the present invention;
Fig. 4 is the process flow diagram of the communication means of the another kind of radio-frequency recognition system of the embodiment of the present invention;
Fig. 5 is the functional block diagram of the read write line in a kind of radio-frequency recognition system of the embodiment of the present invention;
Fig. 6 is the functional block diagram of the label in a kind of radio-frequency recognition system of the embodiment of the present invention;
Fig. 7 is the tag state transition diagram in the radio-frequency recognition system of the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 3 is the process flow diagram of the communication means of a kind of radio-frequency recognition system of the embodiment of the present invention.As shown in Figure 3, the executive agent of the method is the read write line in this radio-frequency recognition system, and the method comprises the steps:
Step 101, detection enter the label of radio frequency electromagnetic field; After label enters radio frequency electromagnetic field, if the radio listening silence password non-zero itself prestored, described label enters radio listening silence state.The label being in " radio listening silence " state only responds the password that wakes up of read write line, if password is effective, jumps to " ready " state.
Step 102, to send non-zero to above-mentioned label wake password up to wake this label up, make this label proceed to ready state from radio listening silence state, wherein, this value waking password up is consistent with the radio listening silence password of label itself.
In embodiments of the present invention, radio listening silence password is consistent with waking password up, and its effect is after label carries out silent status, is waken up by label, is transformed into ready state.
Radio listening silence password can prestore in the label, when label is in silent status time, wait for the order of reader/read write line, if in the order of reader to wake password up consistent with the radio listening silence password of label itself, then label is waken up, jump to ready state, otherwise label keeps silent status.
The password of such as label own is 5, if the password that wakes up that reader sends is 5, so label jumps to ready state; If waking password up is 4, so this order just ignored by label, keeps silent status.
Preferably, above-mentioned password can be string number, such as, adopt 32bit number.
Alternatively, shown in Fig. 3, method can further include step: when above-mentioned label is in acknowledgement state, sends the authentication key of RANDOM NUMBER request instruction and non-zero, make above-mentioned label proceed to discriminating state to above-mentioned label; According to the random number that above-mentioned label returns, and carry out identity verify between above-mentioned label; When differentiating successfully, above-mentioned label is proceeded to open state to conduct interviews to above-mentioned label from discriminating state.
Alternatively, shown in Fig. 3, method can further include step: when above-mentioned label is in acknowledgement state, and sending RANDOM NUMBER request instruction with value to above-mentioned label is the authentication key of zero, and above-mentioned label is proceeded to open state from acknowledgement state.
Alternatively, shown in Fig. 3, method can further include step: when the above-mentioned label being in open state comprises the different multiple tag storage district of secure access password, the secure access password expecting the tag storage district accessed in above-mentioned multiple tag storage district is sent to above-mentioned label, make above-mentioned label proceed to safe condition from open state, conduct interviews with the tag storage district accessed above-mentioned expectation.Because there is different access passwords in different tag storage districts, thus can ensure that different users cannot read the information of other memory blocks, make different user access different memory areas like this, each user has respective memory block and password, more convenient to application like this.Each user only has the authority of the memory block of access oneself, and does not have the authority in other tag storage district of access.
In embodiments of the present invention, the state of the label of this radio-frequency recognition system preferably comprises: radio listening silence state, ready state, arbitrate state, response status, acknowledgement state, discriminating state, open state, safe condition and inactivated state.Read write line wakes label up by the correct password that wakes up, checks afterwards in arbitrate state, obtains the random number that label generates; Then read write line is differentiated label according to random number, confirms that identity is legal and to conduct interviews to label afterwards, adopt access password to ensure access rights in access.Due in the whole state flow process of the embodiment of the present invention, employ arbitrary or combination in any in radio listening silence password, access password and authentication mechanism to ensure the security of idle port communication, solve the problem that the security of prior art existence is poor, for different safety problems, adopt multiple safety approach.
In embodiments of the present invention, for the unique identifier information of label, adopt radio listening silence password to protect, do not have correct to wake password up, then cannot check label, thus the unique identifying information of label cannot be obtained; For the authentication of label and read write line, have employed the confirmation that authentication mechanism ensures both sides' identity, prevent the access of illegal identity; For the control of different access authority, by arranging different access password to realize for different tag storage districts.Can also ensure that tag state normally shifts, there will not be the situation of state machine endless loop, improve the security of access simultaneously.
Fig. 4 is the process flow diagram of the communication means of the another kind of radio-frequency recognition system of the embodiment of the present invention.As shown in Figure 4, the executive agent of the method is the label in radio-frequency recognition system, and the method comprises the steps:
After step 201, the label prestoring the radio listening silence password of non-zero enter radio frequency electromagnetic field, enter radio listening silence state;
Particularly, after label enters radio frequency electromagnetic field, if the radio listening silence password non-zero itself prestored, described label enters radio listening silence state.
Step 202, receive this read write line send non-zero wake password up, proceed to ready state from radio listening silence state, the radio listening silence password that this value and label waking password up itself prestores is consistent.
Alternatively, shown in Fig. 4, method can further include step: when being in acknowledgement state, receives the RANDOM NUMBER request instruction of above-mentioned read write line transmission and the authentication key of non-zero, proceeds to discriminating state from acknowledgement state; Generate random number as the identifier of tag access according to above-mentioned RANDOM NUMBER request instruction, between label and above-mentioned read write line, carry out identity verify; When differentiating successfully, proceed to open state from discriminating state to allow the access of above-mentioned read write line.
Alternatively, shown in Fig. 4, method can further include step: when being in acknowledgement state, and the RANDOM NUMBER request instruction and the value that receive the transmission of above-mentioned read write line are the authentication key of zero, proceed to open state from acknowledgement state.
Alternatively, shown in Fig. 4, method can further include step: when having the different multiple tag storage district of secure access password, whether the secure access password for a wherein tag storage district judging that above-mentioned read write line sends is correct, when judged result is for being, proceed to safe condition from open state, to allow above-mentioned read write line, it is expected that the respective labels memory block of access conducts interviews.
Fig. 5 is the functional block diagram of the read write line in a kind of radio-frequency recognition system of the embodiment of the present invention.As shown in Figure 5, this read write line comprises:
Detecting unit 301, for detecting the label entering radio frequency electromagnetic field; Wherein, if the radio listening silence password non-zero that the label itself entering radio frequency electromagnetic field prestores, described label enters radio listening silence state;
Transmitting element 302, for label send non-zero wake password up to wake above-mentioned label up, above-mentioned label is proceeded to ready state from radio listening silence state.The described value waking password up is consistent with the radio listening silence password of label itself.
Alternatively, transmitting element 302, can also be used for when above-mentioned label is in acknowledgement state, sends the authentication key of RANDOM NUMBER request instruction and non-zero, make above-mentioned label proceed to discriminating state to above-mentioned label;
Alternatively, this read write line can also comprise: discriminating unit 303, for the random number returned according to this label, and carries out identity verify between this label; And addressed location 304, for when differentiating successfully, this label is proceeded to open state to conduct interviews to this label.
Alternatively, transmitting element 302, can also be used for when above-mentioned label is in acknowledgement state, and sending RANDOM NUMBER request instruction with value to above-mentioned label is the authentication key of zero, and above-mentioned label is proceeded to open state.
Alternatively, transmitting element 302, can also be used for when the above-mentioned label being in open state comprises the different multiple tag storage district of secure access password, the secure access password expecting the tag storage district accessed in described multiple tag storage district is sent to above-mentioned label, above-mentioned label is proceeded to safe condition, so that above-mentioned addressed location conducts interviews to the tag storage district that above-mentioned expectation is accessed from open state.
Fig. 6 is the functional block diagram of the label in a kind of radio-frequency recognition system of the embodiment of the present invention.As shown in Figure 6, this label itself prestores the radio listening silence password of non-zero, is in radio listening silence state when this label enters radio frequency electromagnetic field, or, if the radio listening silence password that this label itself prestores is zero, be in ready state when this label enters radio frequency electromagnetic field; Wherein, this label comprises:
Receiving element 401, wakes password up for what receive non-zero that read write line sends, described in wake password up the radio listening silence password that itself prestores of value and label consistent;
State conversion unit 402, for waking password up according to above-mentioned non-zero, makes above-mentioned label proceed to ready state from radio listening silence state.
Alternatively, receiving element 401, can also be used for when above-mentioned label is in acknowledgement state, receives the RANDOM NUMBER request instruction of above-mentioned read write line transmission and the authentication key of non-zero; State conversion unit 402, also for proceeding to discriminating state by the state of above-mentioned label from acknowledgement state; Above-mentioned label also comprises: discriminating unit 403, for generating random number according to above-mentioned RANDOM NUMBER request instruction, and makes to carry out identity verify between above-mentioned label and above-mentioned read write line;
Alternatively, state conversion unit 402, can also be used for when differentiating successfully, the state of above-mentioned label is proceeded to open state from discriminating state to allow the access of above-mentioned read write line.
Alternatively, receiving element 401, also for when above-mentioned label is in acknowledgement state, the RANDOM NUMBER request instruction and the value that receive the transmission of above-mentioned read write line are the authentication key of zero; State conversion unit 402, also for the state of above-mentioned label being proceeded to open state from acknowledgement state.
Alternatively, this label also comprises: judging unit 404, and for when having the different multiple tag storage district of secure access password, whether the secure access password for a wherein tag storage district judging that above-mentioned read write line sends is correct; State conversion unit 402, can also be used for, when the judged result of judging unit 404 is for being, proceeding to safe condition by the state of above-mentioned label from open state, conducts interviews to an above-mentioned wherein tag storage district to allow above-mentioned read write line.
Below with reference to the accompanying drawings and, said method, read write line and label are described in detail in conjunction with the embodiments.
Fig. 7 is the tag state transition diagram of the radio-frequency recognition system of the preferred embodiment of the present invention.As shown in Figure 7, the state of the label of this radio-frequency recognition system comprises: radio listening silence state, ready state, arbitrate state, response status, acknowledgement state, discriminating state, open state, safe condition and inactivated state, and the state migration procedure of label is as follows:
1, after label enters radio frequency electromagnetic field, if the label radio listening silence password of non-deactivation is non-vanishing, then " radio listening silence " state is entered; If radio listening silence password is zero, then directly enter ready state.The label being in " radio listening silence " state only responds the wake command of read write line, if wake command is effective, also namely wakes password match up, then jumps to " ready " state.
2, not mourn in silence after powering on configuration, or the label be waken up enters ready state.
If the label 3, being in ready state receives check order Query, and when this label make an inventory tag match time, then enter arbitrate state, carry out anticollision counting; When the mark of making an inventory of this label does not mate, then remain on ready state.
4, in the process of checking, the label meeting response condition jumps to response status, and the random number of backscatter tag, label uses random number as identifier.Particularly, response condition comprises: counter > 0, and makes an inventory and SL tag match.
5, when label is answered successfully, care label is by simplification, and read write line sends and confirms order, and make label enter acknowledgement state, in acknowledgement state, read write line can obtain and be checked the unique identifying information of label.Particularly, this unique identifying information can adopt existing EPC to encode, also can with other article code.
6, in acknowledgement state, after the unique identifying information of label is successfully read, read write line sends RANDOM NUMBER request instruction (RN_req), if now label needs to carry out authentication, namely when authentication key is non-zero, then discriminating state is proceeded to, otherwise when authentication key is 0, proceed to open state, wait to be visited.
7, differentiating that the labeling requirement of state and read write line complete unidirectional or two-way discriminating to confirm both sides' identity, concrete identification flow can be selected according to different demands for security.Differentiate that successful label jumps to open state and conducts interviews, failed label jumps to ready state, does not allow accessed.
8, general reading and writing can be responded at the label of open state, lock, kill order, but correctly can only access the tag storage district not having password, have the tag storage district of access password normally can not access under open state.Can one or more tag storage district be set when label is initialized.
9, when read write line will access the tag storage district of password, by secure access order, after authentication-access password, normally should can access after label jumps to safe condition, comprise the order such as reading and writing, lock.
10, under open state and safe condition label receive password correct kill order, namely inactivated state is proceeded to, label under inactivated state remains at inactivated state, and enters inactivated state immediately when powering on afterwards, does not respond the order of all read write lines.
As can be seen from the above description, the embodiment of the present invention achieves following technique effect: owing to providing multiple tag security access mode, comprise radio listening silence password, deactivation password, memory block access password, authentication key, solve the problem that the security of prior art existence is lower, the secure communication of read write line and label can be realized.
Those of ordinary skill in the art can recognize, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (13)
1. a communication means for radio-frequency recognition system, is characterized in that, described method comprises:
Detect the label entering radio frequency electromagnetic field; Wherein, if the radio listening silence password non-zero that the label itself entering radio frequency electromagnetic field prestores, described label enters radio listening silence state;
What send non-zero to described label wakes password up to wake described label up, makes described label proceed to ready state from radio listening silence state, and described radio listening silence password is consistent with the described value waking password up;
To label send check order, when described label make an inventory tag match time, make described label proceed to arbitrate state from ready state, and carry out anticollision counting;
In the process of checking, make the described label meeting response condition jump to response status, and receive the random number of described label transmission;
When described label is answered successfully, send and confirm order, make label enter acknowledgement state;
When described label is in acknowledgement state, sends the authentication key of RANDOM NUMBER request instruction and non-zero to described label, make described label proceed to discriminating state;
According to the random number that described label returns, and carry out identity verify between described label;
When differentiating successfully, described label is proceeded to open state to conduct interviews to described label from discriminating state.
2. method according to claim 1, is characterized in that, described method also comprises:
When described label is in acknowledgement state, sending RANDOM NUMBER request instruction with value to described label is the authentication key of zero, and described label is proceeded to open state from acknowledgement state.
3. method according to claim 1 and 2, is characterized in that, described method also comprises:
When the described label being in open state comprises the different multiple tag storage district of secure access password, the secure access password expecting the tag storage district accessed in described multiple tag storage district is sent to described label, described label is made to proceed to safe condition from open state, to expect that a tag storage district of access conducts interviews to described.
4. a communication means for radio-frequency recognition system, is characterized in that, described method comprises:
After the label prestoring the radio listening silence password of non-zero enters radio frequency electromagnetic field, enter radio listening silence state;
What receive the non-zero that read write line sends wakes password up, proceeds to ready state from radio listening silence state, described in wake password up the radio listening silence password that itself prestores of value and label consistent;
After order is checked in reception, and when make an inventory tag match time, enter arbitrate state, carry out anticollision counting;
In the process of checking, the described label meeting response condition jumps to response status, and the random number of backscatter tag;
Confirmation of receipt order, proceeds to acknowledgement state from response status;
When being in acknowledgement state, receiving the RANDOM NUMBER request instruction of described read write line transmission and the authentication key of non-zero, proceeding to discriminating state from acknowledgement state;
Random number is generated using the identifier as tag access according to described RANDOM NUMBER request instruction, and and carry out identity verify between described read write line;
When differentiating successfully, proceed to open state from discriminating state to allow the access of described read write line.
5. method according to claim 4, is characterized in that, described method also comprises:
When being in acknowledgement state, the RANDOM NUMBER request instruction and the value that receive the transmission of described read write line are the authentication key of zero, proceed to open state from acknowledgement state.
6. the method according to claim 4 or 5, is characterized in that, described method also comprises:
When having the different multiple tag storage district of secure access password, whether the secure access password for a wherein tag storage district judging that described read write line sends is correct, when judged result is for being, proceed to safe condition from open state, to allow described read write line, a described wherein tag storage district is conducted interviews.
7. the read write line in radio-frequency recognition system, is characterized in that, described read write line comprises:
Detecting unit, for detecting the label entering radio frequency electromagnetic field; Wherein, if the radio listening silence password non-zero that the label itself entering radio frequency electromagnetic field prestores, described label enters radio listening silence state;
Transmitting element, what send non-zero for described label wakes password up to wake described label up, makes described label proceed to ready state from radio listening silence state; Wherein, the radio listening silence password that the value and label of waking password described in up itself prestore is consistent; To label send check order, when described label make an inventory tag match time, make described label proceed to arbitrate state from ready state, and carry out anticollision counting; In the process of checking, make the described label meeting response condition jump to response status, and receive the random number of described label transmission; When described label is answered successfully, send and confirm order, make label enter acknowledgement state;
Described transmitting element, also for when described label is in acknowledgement state, sends the authentication key of RANDOM NUMBER request instruction and non-zero, makes described label proceed to discriminating state to described label;
Described read write line also comprises: discriminating unit, for the random number returned according to described label, and carries out identity verify between described label; And addressed location, for when differentiating successfully, described label is proceeded to open state to conduct interviews to described label.
8. read write line according to claim 7, is characterized in that, described transmitting element, and also for when described label is in acknowledgement state, sending RANDOM NUMBER request instruction with value to described label is the authentication key of zero, and described label is proceeded to open state.
9. the read write line according to claim 7 or 8, it is characterized in that, described transmitting element, also for when described in be in open state label comprise secure access password different multiple tag storage district time, the secure access password expecting the tag storage district accessed in described multiple tag storage district is sent to described label, described label is proceeded to safe condition, to described, described addressed location expects that a tag storage district of access conducts interviews from open state.
10. the label in radio-frequency recognition system, is characterized in that, described label itself prestores the radio listening silence password of non-zero, is in radio listening silence state when described label enters radio frequency electromagnetic field, and wherein, described label comprises:
Receiving element, wakes password up for what receive non-zero that read write line sends, described in wake password up the radio listening silence password that itself prestores of value and label consistent;
State conversion unit, for waking password up according to described non-zero, makes described label proceed to ready state from radio listening silence state; After order is checked in reception, and when make an inventory tag match time, enter arbitrate state, carry out anticollision counting; In the process of checking, the described label meeting response condition jumps to response status, and the random number of backscatter tag; Confirmation of receipt order, proceeds to acknowledgement state from response status;
Described receiving element, also for when described label is in acknowledgement state, receives the RANDOM NUMBER request instruction of described read write line transmission and the authentication key of non-zero;
Described state conversion unit, also for proceeding to discriminating state by the state of described label from acknowledgement state;
Described label also comprises: discriminating unit, for generating random number according to described RANDOM NUMBER request instruction, and makes to carry out identity verify between described label and described read write line;
Described state conversion unit, also for when differentiating successfully, proceeds to the state of described label to open state to allow the access of described read write line from discriminating state.
11. labels according to claim 10, is characterized in that,
Described receiving element, also for when described label is in acknowledgement state, the RANDOM NUMBER request instruction and the value that receive the transmission of described read write line are the authentication key of zero;
Described state conversion unit, also for the state of described label being proceeded to open state from acknowledgement state.
12. labels according to claim 10 or 11, it is characterized in that, described label also comprises: judging unit, for when having the different multiple tag storage district of secure access password, whether the secure access password for a wherein tag storage district judging that described read write line sends is correct;
Described state conversion unit, also for when the judged result of described judging unit is for being, proceeds to safe condition by the state of described label from open state, conducts interviews to a described wherein tag storage district to allow described read write line.
13. 1 kinds of radio-frequency recognition systems, comprise label and read write line, it is characterized in that,
Described read write line, for detecting the label entering radio frequency electromagnetic field; What send non-zero to described label wakes password up to wake described label up, makes described label proceed to ready state from radio listening silence state; Wherein, the radio listening silence password that the value and label of waking password described in up itself prestore is consistent; To label send check order, when described label make an inventory tag match time, make described label proceed to arbitrate state from ready state, and carry out anticollision counting; In the process of checking, make the described label meeting response condition jump to response status, and receive the random number of described label transmission; When described label is answered successfully, send and confirm order, make label enter acknowledgement state;
Described label, if the radio listening silence password non-zero prestored for itself, described label enters radio listening silence state; And when receive described read write line send the non-zero consistent with the value of described radio listening silence password wake password up time, be waken up to proceed to ready state from radio listening silence state; After order is checked in reception, and when make an inventory tag match time, enter arbitrate state, carry out anticollision counting; In the process of checking, the described label meeting response condition jumps to response status, and the random number of backscatter tag; Confirmation of receipt order, proceeds to acknowledgement state from response status; When being in acknowledgement state, receiving the RANDOM NUMBER request instruction of described read write line transmission and the authentication key of non-zero, proceeding to discriminating state from acknowledgement state; Random number is generated using the identifier as tag access according to described RANDOM NUMBER request instruction, and and carry out identity verify between described read write line; When differentiating successfully, proceed to open state from discriminating state to allow the access of described read write line.
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| CN102156895A (en) * | 2011-04-08 | 2011-08-17 | 中国电子技术标准化研究所 | Active RFID (Radio Frequency Identification Device) based method and system for sending broadcast information |
| CN102332083B (en) * | 2011-10-10 | 2014-11-05 | 中国电子技术标准化研究所 | Information transmission methods and devices for radio frequency identification reader and tag |
| CN103500348B (en) * | 2013-09-27 | 2016-08-31 | 爱康普科技（大连）有限公司 | A kind of RFID communication method of enhancing |
| US9740894B1 (en) * | 2016-06-13 | 2017-08-22 | Motorola Mobility Llc | Silent RFID state and restore back |
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