CN1790362A - Method and device for data transmission - Google Patents

Abstract

A method for data transmission between base station and at least a faraway unit such as responder or long-distance sensor. Especially in a RFID system which has at least a base station and various (and variational) type as well as amount labels, the widely-known communication method based on preconcerted uniform transport protocol usual has no effect, the RFID system mentioned in this invention provides solution of a same label for various users. Moreover, when users want to use them special solution, this solution can not describe through single uniform coding. This new method makes the new instruction sequence (protocol expansion) with expanded protocols and identification which is safer than the above mentioned method possible, the above mentioned protocols have no conflict with the existing protocols.

Description

The method and apparatus that is used for data transmission

Technical field

The present invention relates to a kind of method of utilizing the electromagnetic transmission data between being used in base station and at least one remote unit, as transponder or distance sensor, the packets of information that modulation is made of different symbols on this electromagnetic wave, wherein these packets of information have at least one head sections and a data segment, wherein clearly defined this symbol and wherein encode by this symbol in data segment subsequently and transmit data in the head sections of at least one packets of information.

In addition, the present invention relates to a kind of device that is used for by the electromagnetic transmission data, on this electromagnetic wave, can modulate the packets of information that constitutes by distinct symbols, this device has the base station with at least one remote unit, as transponder or distance sensor, wherein packets of information has at least one head sections and a data segment, has wherein clearly defined this symbol and wherein can encode and transmit data by this symbol in data segment subsequently in the head sections of at least one packets of information.

Background technology

Usually, be used for the base station and at a distance unit, for example transponder or distance sensor-below abbreviate as together " label (Tag) "-between the method for transmission data so that in so-called authentication process, carry out identification.At this, data protocol or host-host protocol constitute the basis of the bidirectional data transfers between label and the base station, this data protocol or host-host protocol are mainly determined the quantity of information symbol, for example define the numerical digit valency (Wertigkeiten) of each data bit and the identification of single symbol.Especially the corresponding method that relates to the favourable structure of head sections is the theme of the applicant's (disclosed on May 12nd, 2004) EP1417631, and the content of this application becomes the ingredient of present disclosure hereby by reference gamut ground.

In the scope of the internationalization cooperation in radio frequency identification (RFID) field, in the past, so-called " (minimum) air interface " defines with the form of the data protocol interface between label and the base station, " Specification for an RFID AirInterface; EPCglobal, EPC referring on September 27th, 2004 ^TMRadio-Frequency Identity Protocols, Class-1 Generation-2 UHF RFID, Protocol for Communications at860MHz-960MHz, Version 1.0.7 " (abbreviating EPCglobal as).In such agreement, the order that the later protocol extension that will once determine in simple mode is added with can having difficulty or the order of this class.Also add very difficultly, in such agreement, repeatedly keep coded sequence at the expansion of after a while official.For example, mention at the notion of EPCglobal herein and considering: other the protocol class (class 2 and class 3) that should expand the additional functional block of providing the application relevant based on basic protocol notion (class 1) just like sensor application or safety.At the expansion outside this standard, on the basis of described agreement notion or will consider so-called customer command or will consider the predetermined regularly coded sequence that some are determined, referring to the 11st page of EPCglobal.

In disclosed rfid system with at least one base station and different (with changing) type and amount labels, this method is inoperative usually, provide same label solution to different user in this label.Though in this case, the host-host protocol that is adopted can provide the specific coding of user basically; ; when a plurality of users also relate to the label of different manufacturers in addition; can produce difficulty; because user of each addressable of order that definite user is specific; especially when a plurality of users want to adopt the specific solution of user separately, they thereby no longer can describe by unique unified coding.Thereby, at the platform solution, in this platform solution at low cost the mode of operation (multi-protocols ability) that changed of explosion command coding or switch to, as full duplex work in, novel settlement mechanism is essential.

Summary of the invention

The present invention is with air interface, for example disclosed air interface is that starting point is based on following task in the EPCglobal standard, be the method that following further exploitation starts described type, instruction sequence promptly new, Extended Protocol (back is called " protocol extension " for short with mode switch) than this more safely be identified and do not have with existing protocol conflict.In addition, be suitable for carrying out the high part of utilization once more that the device of method of the present invention should be by the logical circuit that exists according to standard and outstanding, this has determined the additional cost advantage according to solution of the present invention.

This task solves in the method for the described type of beginning thus, promptly revise so at least one head sections in order to change applied host-host protocol, make in not supporting the remote unit of reformed agreement, trigger an error condition (Fehlerzustand) so and this unit from the communicating by letter of base station withdraw from.In order to solve this task, structure starts the device of described type like this, make and appliedly to be used to revise the host-host protocol of at least one head sections and to set up the base station in order to change, by this head sections, in not supporting the remote unit of reformed agreement, error condition can with from the communication of base station withdraw to combine and trigger.Therefore, in the rfid system that is subjected to the constraint of corresponding protocol agreement, may make every effort to the extended instruction storehouse in simple mode, its mode is that above-mentioned head sections changes by the base station, this situation by tag recognition-change at supported protocol not be identified as at least mistake-.The method according to this invention especially can be used for, and the data transmission from the base station to the label is transformed into full-duplex mode, the decoded signal of this label backscattering (backscattert) wherein, but make the mistake that this base station quick identification may exist.Determine that in the EPCglobal standard of having mentioned link only is driven in semiduplex mode; Otherwise the order of just in time avoiding according to the present invention, the user is specific is necessary, and the logic cost correspondingly is limited thus.

Combine with protocol conversion according to the present invention, possible in addition is to explain that therefore some (standard) determined orders that depart from its standard definition also take almost doublely.In this case, the storage arrangement of all existence and decoder device can further be used, because corresponding command word remains unchanged.This state also helps, and reaches the high part of utilizing once more of existing switching logic.

In the EPCglobal standard, describe with reference to the 25th page of Fig. 6 .4 that goes up the there, the two-way RF which head sections structure is used to start between base station and the label connects (Fig. 6 .4's is top) or is used for the instruction transmission (Fig. 6 .4's is following) that the two-way RF between base station and the label connects.Content during these disclose corresponding to those above-mentioned EP the applicant.In " space "-afterwards of so-called delimiter (Delimiter)-predetermined lasting time, shown head sections structure has the data nil symbol of a logic respectively, and it can be used for checking the likelihood of head sections.,, one side changes so being used to this symbol to cause agreement in an advantageous manner in scope of the present invention owing to there is not mandatory provision to implement this likelihood check.In view of the above, the method according to this invention is come outstanding in further configuration thus, and promptly first symbol of at least one head sections is modified.At this preferably, first logical symbol of described at least one head sections is changed into its logical inverse symbol, just according to the present invention, forms data one by data zero.On the other hand, the unfettered property of checking based on likelihood draws, and some labels of determining may not cause the change of respective symbol, because do not test in these labels.Further describe in detail below the further configuration of the method according to this invention, this configuration is more safely avoided this possibility especially.

What convertible ground was also possible is, after head sections, enclose additional symbol, the duration of this symbol is longer than the duration that is used in the symbol in the head sections before each basically, make, when label was not supported the corresponding protocol expansion, the protocol detection device that is present in regularly in the label was interpreted as mistake with this.Yet this solution has shortcoming in principle, is promptly losing the valuable time owing to transmit additional symbol in the arbitration routine fast.

The preferred further configuration regulation of the method according to this invention, first symbol of at least one head sections carries out logical operation by intermediate storage and with subsequently calibration symbol, for example compares aspect time span, so that prove the modification of first symbol.Correspondingly, device according to the present invention in particularly advantageous form of implementation, can have one at relative first protocol modification of at least one head sections the intermediate storage mean, of symbol at the symbol of intermediate storage and logical calculation device and definite device of calibration symbol, this determines that device is configured to prove the modification of the symbol of intermediate storage.

According to the EPCglobal standard, and then the data nil symbol is transmitted calibration symbol RTcal, the length of this calibration symbol is made of jointly the duration addition ground of duration of data zero and data one, and wherein the half value of RTcal is used as the boundary value for the differentiation between the data zero-sum data one later on.Also be, first symbol of head sections is so changed in a preferred manner according to the present invention, the data one that back to back RTcal definition feasible and for first symbol of revising combines and obtains logic, the data one of this logic then can be identified as this symbol by label.For this reason, two described symbols are determined in time and relatively (logical operation) according to above-mentioned situation, wherein the temporal length of first symbol-as described-at least by intermediate storage.

Support the label of corresponding (inquiry of passing through the base station based on explanation in head sections changes considers that following director data also is essential) protocol extension to know in principle in this moment, execution is from the order of the instruction database of being expanded or carry out mode switch.But necessary forcibly for this reason is, this label is in fact also checked the length of first symbol as described, as top further mentioned.If this is not this situation, so corresponding label can not identify the variation in the agreement.For this reason, most preferred further configuration regulation according to the method according to this invention, in the remote unit of supporting reformed agreement, when revising at least one head sections, produce the pseudo-data stream that constitutes by at least one signal pulse, can be employed with the label that can not expand in order clearly to distinguish the label that to expand after this puppet data stream.Correspondingly, preferably constructed like this, make the remote unit of supporting reformed agreement when revising at least one head sections, be configured to produce the pseudo-data stream that constitutes by at least one signal pulse according to device of the present invention.

This puppet data stream is effective during by the base station transmits head sections in the scope of the particularly advantageous embodiment of the method according to this invention.Under this situation, " effectively " means, the pseudo-data stream of a proper device is fed to according to device of the present invention, and the corresponding variation of using according to the defined conclusive signal change procedure of host-host protocol of standard occurs at this.For example, pseudo-data stream is fed to verifying attachment, as the CRC register, and processed together there, make this puppet data stream effectively (together) influence the result that CRC determines.

This puppet data stream is for example by being produced and be suggested during at least one head sections and/or after directly receiving last head sections symbol in an advantageous manner at the signal that the trap that transmits during the head sections (Notch) signal is derived regularly.For its processing on meaning of the present invention, this device has circuit arrangement in addition, and this circuit arrangement is configured to the validity according to pseudo-data stream check data segment subsequently, that is to say the validity of checking data segment subsequently according to pseudo-data stream.This circuit arrangement provides the result of the validity that exactly is used to check the order of transmitting in data segment for this purpose.This circuit arrangement can for example relate to a digit counter, this digit counter begins by pseudo-data stream and the quantity of the bit that transmitted of counting simply, and wherein each command sequence is by the bit waiting for transmission of some precognitions of determining (with being stored) quantity with constitute as the check bit of parity check bit or CRC position in case of necessity.The corresponding further configuration regulation of the method according to this invention, some data bit that will transmit in data segment are verified.In view of the above, when correct and bit number was correspondingly consistent with the predetermined definition of order when coding, order then was considered effective.If exist, then verification and or the verification of this class also must be correct.

The above-mentioned application of digit counter consider cost provable be disadvantageous, because the order that digit counter also can be used to " not crucial " agreement intermediate steps, receive as storage, be used to detect the additional pulse of pseudo-data stream thus and necessary decoding cost increases, this causes negative cost result.

Interchangeable possibility is, to flow to the circuit arrangement of CRC unit for example or parity elements by the pseudo-data stream that label produces, this circuit arrangement is responsible for the safe floor of agreement, makes that check is assigned to the characteristic quantity of data segment according to the present invention, as CRC data or parity data.Therewith correspondingly, in device according to the present invention, in preferred configuration, stipulate that circuit arrangement is configured and is used to check the characteristic quantity that is assigned to data segment.In this, realized that by the further configuration of this method the check of this characteristic quantity just in time triggers the error condition in the unit of not supporting reformed agreement.

In supporting the remote unit of reformed agreement, in further research approach of the present invention, be used for the necessary primary data of verification characteristics amount-so-called prestrain value-, when revising at least one head sections, be conditioned and depart from standard value.This carries out especially thus, promptly is used for the necessary primary data of verification characteristics amount and is transferred to remote unit from the base station, and wherein the transmission of primary data preferably utilizes at least one head sections to realize.At this, this primary data is impliedly transmitted in an advantageous manner, and its mode is to be used to regulate this initial value in response to request ground by the pseudo-data stream that the base station generated by corresponding label." impliedly regulate " and mean that in this case the base station is not to regulate (predesignating) value for the CRC register simply, but uses (puppet) data that for this reason producing in label during the head sections.Replacedly, also may directly regulate the prestrain value and not return the pseudo-data stream of access.

In addition, stipulate in the research approach further that characteristic quantity produces under the situation of the pseudo-data stream of considering to be produced by the base station in the unit of the reformed agreement of support at the corresponding of the method according to this invention.

Label can so will be compared with (known in advance) expectation value by the result that circuit arrangement provided at the place, end of forward transmitted.Under the situation of the circuit arrangement that is constructed to the CRC unit specially, base station and label must be considered according to above-mentioned situation in this case, in order to determine crc value, the initial value of calculating (primary data) must be changed based on the pseudo-data stream relative standard's head sections no-protocol that is added with expanding.Initial value-as already mentioned above like that-be expressed as so-called prestrain value, and preferably impliedly in head sections, be conditioned: realizing resetting of CRC unit after by first time clock that label produced according to the symbol of head sections for label; The pulse of following is presented on the CRC register and correspondingly is used to regulate the prestrain value.Replacedly, in this also can be along with first of boundary symbol (delimiter) the execution CRC unit of introducing head sections resets.This measure has following advantage, can use longer pseudo-data stream.

In process of the present invention, therefore for protocol extension, for example following measures are possible in principle: first symbol of at first revising at least one head sections by the base station.Preferably, first logical symbol of at least one head sections is changed into its logical inverse symbol (data one replace data zero) for this reason.And then may directly regulate a prestrain value (for example EEEEh) definite, that depart from standard (for example FFFFh of 16 CRC registers) simply, but this when certain condition on hardware technology than subsequently more described conversion scheme more unfavorable.In view of the hardware spending that will drive, simpler is that (impliedly) regulates new prestrain value as described under the situation of utilizing the pseudo-data stream that is produced by label in case of necessity.

Therefore, under any circumstance, defined instruction group clearly after head sections.If there is no protocol extension is then carried out resetting again of CRC unit.Depart from that the crc value of being tried to achieve by base station and label causes that error reporting by label, this label have been discerned crc error (perhaps correspondingly parity error) so and withdraw from from this communication.

When at (puppet) data sequence of definite (expansion) instruction expectation when pre-defined, can reach the Hamming distance of optimization by the concrete mathematics configuration of applied unit, how safer aspect this Hamming distance explanation, the security of the polynomial expression wrong identification of in the CRC unit, using on the throne.Pseudo-data stream can be for example open in the tables of data of label or corresponding IC.In having three head sections symbols of CRC time clock respectively, therefore obtain at the possible configuration of the 2^3 kind of pseudo-data stream.

Therefore possiblely according to the present invention be, the minimal definition of the known in advance RFID air interface of expansion like this, make the arbitration order of the intactly instruction sequence of release new-for example decision or " emission subcarrier " instruction-or new mode of operation, as the full-duplex mode in forward link and the return link.First sign as such expansion at first changes head sections under the situation of considering favourable timing (only small time lengthening).And then, guarantee certain property distinguished by at least one additional signals pulse in an advantageous manner, especially guarantee, as previously described in detail by on the safe floor of communication (CRC unit or digit counter), handling pulse.

Description of drawings

Other advantages of the present invention and characteristic are from dependent claims and drawing the explanation of embodiment with reference to the accompanying drawings subsequently.Wherein:

Fig. 1 illustrates one according to the device with base station and passive transponder of the present invention;

Fig. 2 illustrate in schematic form at the situation of the default data flow of no-protocol expansion possible, according to signal change procedure of the present invention;

The diagrammatic sketch that Fig. 3 is similar to Fig. 2 is illustrated in the situation of application by the protocol extension under the situation of the pseudo-data stream of transponder generation; And

Fig. 4 illustrates the process flow diagram according to transmission method of the present invention.

Embodiment

One of the device form that is used for data transmission who draws base station BS and passive transponder (label) TA in Fig. 1 is according to device of the present invention.In this case, transponder tango A draws its energy P from the carrier wave (not shown) of base station BS.Such system mainly is used in automobile (KFZ) field, and wherein transponder is embedded into door key and base station BS is embedded in the automobile.This base station BS has integrated IC circuit 1, and what 1 control of this IC circuit had a radiating portion SXT1 and a receiving unit RXT1 transmits and receives cell S E1.In order to transmit data D, this base station BS at first sends a carrier wave (not shown) of modulating, this carrier wave has transmitting and receiving that cell S E2 receives and being handed to a control module CON for analysis of a receiving unit RXT2 and a radiating portion SXT2 by transponder tango A by one, and wherein this transmits and receives part SE2 and also absorbs in addition in order to supply with the necessary energy P of transponder tango A.This data transmission D also can return base station BS two-way realization (backscattering) from transponder tango A, for example in half-duplex or full-duplex method.

Described reception and radiating portion have a suitable antenna assembly as dipole antenna or this class respectively.In addition, integrated circuit (IC) 2 also comprises a control module CON and a storage unit SP at least, the protocol extension of wherein depositing the determined characteristic quantity of the agreement that is used for the data transmission information bag and determine more in case of necessity according to the present invention in this storage unit SP, as being used for the instruction of mode switch.Corresponding storage unit (not shown) also is comprised in the integrated circuit (IC) 1 of base station BS in an advantageous manner.In addition, storage unit SP also can be used for data or the single data bit that receives that intermediate storage receives by label TA.In addition, two integrated circuit (IC) 1, IC2 also have circuit arrangement SCH1, SCH2, these two circuit arrangement SCH1, SCH2 be configured to produce and check the characteristic quantity that is assigned to the data D that is transmitted, for example CRC check and.Therefore, circuit arrangement especially relates to the CRC register, just has a class robot brain of definite polynomial computation rule, and this robot brain can load suitable data stream, and this is that those skilled in the art are familiar with.

Integrated circuit (IC) 2 or control module CON have according to the present invention at least one in addition by the data symbol (SYM1 of intermediate storage in storage unit SP; Be described in further detail referring to following for this reason) and a calibration symbol (RTcal who receives by base station BS; For this reason referring to being described in further detail below) logical calculation device VER and a definite device BES, this determines that device BES is configured to prove by the definite characteristic that meets SYM1 of intermediate storage, as relatively according to the modification that host-host protocol carried out of standard.In shown embodiment, logical calculation device VER is configured to compare two above-mentioned symbols aspect their time span, make should determine device BES-in case of necessity with the coefficient condition of the storage unit SP that wherein deposits corresponding predetermined value under-can discern, whether length relative standard's length of symbol SYM1 changes, and for example is extended.

According to the diagrammatic sketch among Fig. 1, the cell S E2 that transmits and receives of label TA has one and transmits and receives the path.Combine with passive transponder, transmit and receive usually so structure of path, make the shown embodiment of two paths-deviate from-utilize common antenna to drive, this well known to a person skilled in the art equally.

Protocol extension does not wherein take place in the possible signal change procedure in time under the situation of the schematically illustrated default data flow (Default-Datenstrom) by base station BS (Fig. 1) emission of Fig. 2.Time t changes along the direction of arrow respectively in Fig. 2 and Fig. 3 from left to right.At first in Fig. 2 (above) be illustrated in the signal flow SBS from base station BS to label TA (Fig. 1) under one the first data transfer rate situation.At this, for example relate to the beginning of the head sections that constitutes by two or three symbols, utilize it to make base station and label begin to carry out communicate by letter (referring to the corresponding disclosure among the applicant's the EP 1417631) with each other device ingredient respectively.Before original head sections, there is a delimiter ,-so-called delimiter DL with field space form of definite duration-, referring to the EPCglobal standard.Thereafter, under the situation of Fig. 2, as the first symbol SYM1 of head sections, logical data zero D0 and then.This logical data zero D0 is defined as the symbol that the duration is T＜(1/2) * RTcal, wherein RTcal is the calibration symbol after the first symbol SYM1, this calibration symbol or its duration determined, the base station is how to being worth 0,1 and in case of necessity end of transmission (EOT) EOF (end of frame (end of frame)) is encoded.

Under signal flow SBS, the signal change procedure RCRC that resets of the CRC register SCH2 for label TA (Fig. 1) shown in Figure 2.Because the base station begins the place according to standard emission data zero head sections, thus the CRC register returned in the initial state by twice setting by shown pulse I1, I2, for example after the RTcal symbol.As following illustrated, at this, at pulse I3, the I4 of the clocking CCRC of end of each symbol of head sections and CRC register SCH2 is provided, wherein effectively (aktive) edge is the marginal edge of separately pulse I3, I4.Though CRC register SCH2 obtains two pulse I3, I4 in view of the above under the situation of default data flow, second pulse I4 in these two pulses no longer in head sections, but be arranged in transmission, subsequently data segment in time.But only this second clock pulse I4 works, because realize resetting by pulse I2 before: pulse I2 makes CRC register SCH2 enter basic status (Grundzustand); Then utilize pulse I4 to carry out next calculation procedure.

Possible pseudo-data stream DCRC who calculates for CRC of explanation under the CCRC signal.The data sequence of agreement before this data stream relates to, this data sequence preferably always produces in an identical manner.Just do not work (as follows but finally have only when having pulse I2 to exist; Referring to Fig. 3).Data stream DCRC also can derive from the base station in principle.Must define in this case, which data obtains in control character.

Convertible ground, such realization also is possible in this, promptly wherein this CRC register at first utilizes delimiter DL to be set up back in the initial state.And then, during whole head sections, load pseudo-data stream.Only identified stress not live protocol extension the time when label, the CRC register is just resetted once more by corresponding pulse (referring to the I2 among Fig. 2, I3).

In contrast to this, Fig. 3 illustrates corresponding signal change procedure SBS ', RCRC ', CCRC ', the DCRC ' at this situation, the label TA (Fig. 1) that is the supported protocol expansion is asked by base station BS, in instruction database that visit is expanded or the mode of operation that switches to other.The diagrammatic sketch of Fig. 3 is for the former of drawing thereby separately based on one second data transfer rate, the data transfer rate of this data transfer rate slip chart 2.This is to the exhausted hard-core effect of theme of the present invention.

In order to carry out protocol extension, base station BS is launched data one D1 after the delimiter DL as the first symbol SYM1 of signal flow SBS ', then be calibration symbol RTcal, as mentioned above.Because the data one among the signal flow SBS ' are not carried out resetting of CRC register SCH2 in this case the RTcal symbol after, but only the pulse I1 ' by signal RCRC ' follows delimiter DL.Next, provide all time clock I2 '-I4 ' of signal CCRC ' to CRC register SCH2, make to obtain the prestrain value that a diagrammatic sketch among relative Fig. 2 changes at this CRC register SCH2, this prestrain value CRC check and back to back calculating in comprising under the condition of the pseudo-data stream DCRC ' that produces by label and can considered together.The pseudo-data stream DCRC ' that calculates for CRC is again the data sequence of arranging before, and this data sequence preferably always produces in an identical manner and works under present case, because do not exist reset pulse I2 (referring to top; Referring to Fig. 2).

As interchangeable embodiment, replace data one D1 (Fig. 3) as the first symbol SYM1, also can use other EOF symbolic data of introducing above zero D0 (Fig. 2), so that protocol extension is shown.

The when supported protocol expansion and analyze the first symbol SYM1 of head sections of prestrain value thereby in head sections, impliedly be notified to label TA and by this label TA identification, label by base station BS.Under any circumstance, the base station under the condition of considering the prestrain value, know or by circuit arrangement SCH1 (Fig. 1) can determine correct CRC check with, and send this label to.Now, in section from the head when correctly learning the prestrain value, just when in fact also supported protocol expansion, then will only determine a no crc error according to the present invention.This situation is used in scope of the present invention, will foreclose with such label of base station communication, and these labels identify crc error under the situation of Fig. 3.

And then, Fig. 4 illustrates a possible flow process of the method according to this invention once more by process flow diagram.At first, label TA (Fig. 1) is at the medium delimiter DL (Fig. 2,3) that treats of first step S1.If in step S1, affirmative acknowledgement (ACK) (j) is made in corresponding circulating inquiry and this delimiter DL is received, then in step S2, carry out resetting of CRC register SCH2.Otherwise (n) re-execute step S1.

And then step S2, label is waited for the next rising edge edge among signal flow SBS, the SBS ' (Fig. 2, Fig. 3) in step S3, this rising edge is along the end of the mark first symbol SYM1, herein: data zero D0 (Fig. 2) or data one D1 (Fig. 3).If in step S3, affirmative acknowledgement (ACK) (j) is made in corresponding circulating inquiry, then in step S4 subsequently with the length T intermediate storage of time of the first symbol SYM1 (referring to Fig. 2,3) in storage unit SP (Fig. 1) and change the logic state of DCRC (') data stream (Fig. 2, Fig. 3), DCRC (')=1.Simultaneously, give CRC register SCH2 with time clock I1, I1 '.The corresponding new value of register this clearly (explizit) depend on applied computation rule (polynomial expression).So label is waited for the signal edge that rises again in step S5, the end (Fig. 2, Fig. 3) of RTcal symbol has been determined in the appearance (j) at the signal edge of this rising.And then, at step S6, the value of RTcal is stored among the storage unit SP, and this storage unit SP changes the logic state of DCRC (') data stream (Fig. 2, Fig. 3), DCRC (')=0, and give CRC register SCH2 with another time clock.

In addition, the value of the check first symbol SYM1 in step S6.For this reason, according to the present invention, by the symbol SYM1 of intermediate storage and subsequently calibration symbol RTcal arithmetically comparatively-as top detailed description the in detail like that-in logical calculation device VER (Fig. 1), carry out logical operation, so that by determining that device BES (Fig. 1) proves (temporal) modification of first symbol.Then whether following first symbol of then inquiring relates to data zero D0 in step S7.If affirmative acknowledgement (ACK) (j) is made in this inquiry, then CRC register SCH2 just is reset until the appearance of first data symbol in step S8, referring to the pulse I2 among Fig. 2.After this, label is waited for the end of head sections in step S9, and the end of this head sections for example defines in EP1417631.In situation (j), this process is jumped to step S10, and (first symbol is data one to this step S10, Fig. 3) directly follows step S7, and gives the CRC register SCH2 (I4 among Fig. 2 with other time clock for SYM1=D1; I3 ' among Fig. 3, I4 '), until the end that reaches transmission.When first valid data were transmitted, after this CRC register had different values at above-mentioned two kinds of situations.

According to the present invention, and then be further processed, as top described in detail ground.

The reference number table

BES determines device

The BS base station

CCRC, CCRC ' clock signal

The CON electric insulation layer, field oxide layer

The D transfer of data

The DL symbol of demarcating, delimiter

DCRC, DCRC ' data stream

D0 data zero

D1 data one

The IC1 integrated circuit

The IC2 integrated circuit

I1-I4 ' pulse

The P supplying energy

RCRC, RCRC ' reset signal

The Rtcal calibration symbol

The RXT1 receiving unit

The RXT2 receiving unit

SBS, SBS ' signal flow

The SCH1 circuit arrangement

The SCH2 circuit arrangement

SE1 transmits and receives the unit

SE2 transmits and receives the unit

The SP storage unit

The SXT1 radiating portion

The SXT2 radiating portion

The SYM1 first head sections symbol

The S1-S10 method step

The t time

The TA label

The VER logical calculation device

Claims (21)

1. utilize the method for electromagnetic transmission data between being used in base station and at least one remote unit, as transponder or distance sensor, the packets of information that modulation is made up of distinct symbols on this electromagnetic wave, wherein these packets of information have at least one head sections and a data segment, some symbols of univocality ground definition and wherein in a data segment of following, encode and transmit data in the described head sections of at least one packets of information wherein by means of these symbols

It is characterized in that,

Revise so at least one head sections in order to change applied host-host protocol, make and in a remote unit of not supporting this reformed agreement, trigger an error condition, and make thus this unit from the communicating by letter of this base station withdraw from.

2. the method for claim 1 is characterized in that, first symbol of described at least one head sections is modified.

3. method as claimed in claim 2 is characterized in that, first logical symbol of described at least one head sections is changed into its logical inverse symbol.

4. as claim 2 or 3 described methods, it is characterized in that this of described at least one head sections first symbol carries out logical operation by intermediate storage and with a calibration symbol subsequently, so that prove the described modification of this first symbol.

5. as the described method of one of claim 1 to 4, it is characterized in that, when revising described at least one head sections, in a remote unit of supporting described reformed agreement, produce the pseudo-data stream that constitutes by at least one signal pulse.

6. method as claimed in claim 5 is characterized in that, described pseudo-data stream is being produced during described at least one head sections and/or after directly receiving a last head sections symbol.

7. as claim 5 or 6 described methods, it is characterized in that, according to the validity of a data segment subsequently of this puppet data stream check.

8. method as claimed in claim 7 is characterized in that, some data bit waiting for transmission in described data segment are verified.

9. as claim 7 or 8 described methods, it is characterized in that, characteristic quantity that is assigned to this data segment, be verified as CRC data or parity data.

10. method as claimed in claim 9 is characterized in that, the check of described characteristic quantity triggers the error condition in the unit of not supporting described reformed agreement.

11. as claim 9 or 10 described methods, it is characterized in that, in a remote unit of supporting described reformed agreement, with one be used to check described characteristic quantity and necessary primary data when revising described at least one head sections and a standard value regulate with departing from.

12. method as claimed in claim 11 is characterized in that, with described be used to check described characteristic quantity and necessary primary data from described base station transmits to these remote unit.

13. method as claimed in claim 12 is characterized in that, this primary data is transmitted by described at least one head sections.

14., it is characterized in that this characteristic quantity produces under the situation of considering the described pseudo-data stream that produces in the unit of this reformed agreement of support by this base station as the described method of one of claim 9 to 13.

15. be used for device by the electromagnetic transmission data, has the base station with at least one remote unit, as transponder or distance sensor, on this electromagnetic wave, can modulate the packets of information that constitutes by different symbols, wherein these packets of information have at least one head sections and a data segment, wherein in the head sections of at least one packets of information some symbols of univocality ground definition and wherein in a data segment of following by these symbol codifieds with can transmit data

It is characterized in that,

(BS) set up in this base station, can revise at least one head sections for the change of applied host-host protocol, by this head sections in a remote unit (TA) of not supporting this reformed agreement can with from the communicating by letter of this base station (BS) withdraw from and trigger an error condition with interrelating.

16. device as claimed in claim 15, it is characterized in that, have the intermediate storage mean (SP) of the symbol (SYM1) that relative one first agreement that is used for described at least one head sections is modified, for this by the logical calculation device (VER) of the symbol of intermediate storage and a calibration symbol (RTcal), and having a definite device (BES), this determines that device is configured to prove the modification of the symbol (SYM1) of this intermediate storage.

17. as claim 15 or 16 described devices, it is characterized in that, be used to produce one by at least one signal pulse (I3 when supporting the remote unit (TA) of described reformed agreement to be built into to revise described at least one head sections, I4, I2 ', I3 ', I4 ') the pseudo-data stream (CCRC, CCRC ') that constitutes.

18. device as claimed in claim 17 is characterized in that, this device has a circuit arrangement (SCH1, SCH2), (SCH1 SCH2) is configured to validity according to a data segment subsequently of described pseudo-data stream (CCRC, CCRC ') check to this circuit arrangement.

19. device as claimed in claim 18 is characterized in that, (SCH1 SCH2) is configured to check some data bit waiting for transmission in described data segment to described circuit arrangement.

20. as claim 18 or 19 described devices, it is characterized in that, described circuit arrangement (SCH1, SCH2) be configured to check one be assigned to the characteristic quantity of described data segment, as CRC data or parity data.

21. device as claimed in claim 20 is characterized in that, (SCH1 SCH2) is constructed to CRC unit or parity elements to described circuit arrangement.

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