DE102020200953B4 - Optimized data transmission for UHF transponders - Google Patents

Abstract

The invention presents a concept in which a read-write device (10) with at least one predetermined transponder (20) can exchange data packets more efficiently. The read / write device (10) and the transponder (20) are configured so that the read / write device (10) prepares a communication to the predetermined transponder (20) in a predetermined isolation phase using a communication protocol (28) in order to communicate with the predetermined transponder (20) in a data exchange phase following the predetermined isolation phase. The read / write device (10) and the transponder (20) are configured to exchange a plurality of data packets (50) in the predetermined data exchange phase before the next separation phase begins.

Description

FIELD OF THE INVENTION

The present invention relates to a read-write device and a transponder that can be connected to it, in particular a UHF sensor-transponder for optimized data transmission according to an optimized method.

BACKGROUND

RFID (radio-frequency identification) systems have been in use for a long time and are enjoying increasing popularity. An RFID system consists of a transponder, which contains an identifying code or an identifier, and a reader for reading out this identifier by means of a program that controls the read / write device. A coupling with the transponder takes place via electromagnetic alternating fields generated by the read / write device. The electromagnetic alternating fields not only transmit data, but also supply the transponder with energy. Active transponders with their own power supply are used to achieve greater ranges. A special form of RFID transponders are sensor transponders, which represent a combination of standard transponders with additional logic for the acquisition and transmission of sensor values using standardized protocols. For example, RFID technology can be used for the batteryless reading of sensor values using a UHF field for sensor transponders. When transponders communicate in the UHF range, the ISO 18,000-6 standard is established, which defines a coding and protocol for communication between a transponder and read / write device. In the context of the invention, communication is understood to mean data transmission between the read / write device and at least one transponder. A data transmission of sensor values is currently implemented by means of read or write access to a memory of the transponder. In addition to the duration of the actual data transmission between the read / write device and the transponder, which is dependent on a data transmission rate and a number of data to be transmitted, there are also time segments in the entire process which between one end of the transmission of the read / write device and a beginning of a response from the transponder will pass. In addition, certain steps, which consist of several transmissions, are necessary to identify and address the transponder, for example. In order to be able to carry out read or write access to a transponder, an access code, a so-called "handle", must be exchanged with it. This takes place in an initialization phase through a recognition process, also called “inventory”, whereby the validity of the “handle” can be maintained until the electromagnetic carrier field is switched off or left. Thus, with each individual transmission of data from the read-write device, the full length of the "handle" is transmitted for addressing the individual / respective transponder. This means that a separation mechanism must be carried out before read or write access to a specific transponder. Consequently, when a sensor value of a sensor-transponder is queried cyclically, a certain duration is required for addressing the respective sensor-transponder, which severely restricts a maximum sampling rate of the sensor / transponder. The required duration is made up of a transmission rate, waiting times as well as the duration of the individual transmissions and the number of transmissions necessary for communication. If access to the transponder is restricted by a key or cryptographic method, further operations are required to activate the transponder. As a result, time-critical access to, for example, sensor data from the sensor transponder can no longer be guaranteed.

In the following, further approaches from the prior art will be briefly discussed.

the EP 1 904 948 B1 describes a method for communicating with multiple radio frequency (RF) devices. A first RF reader sends a first signal at a first power level, RF devices that respond to the first signal are interrogated and instructed to change their state, and a second signal is sent at a second power level, which is higher than the first power level, one or more of the RF devices responding to the first signal not responding to the second signal after changing state. The method is characterized in that the first power level or the second power level is selected by a backend system on the basis of responses from the first reader and / or from one or more other readers in communication with said backend system.

the EP 3 090 490 B1 describes a passive wireless transponder, with an antenna, a rectifier, an oscillator, a demodulator, a digital control part, a modulator, and a measuring element. The modulated backscattered signal, which transmits a digital response, includes sidebands that are offset from an interrogation frequency by a modulation frequency that is output by the oscillator. Furthermore, the oscillator is based on a resonator, and the measuring element is connected to the oscillator in order to generate the To load the oscillator, and the modulation frequency output by the oscillator, namely the offset of the sidebands of the modulated backscattered signal is dependent on the oscillation frequency, on a measured value of the predetermined size and transmits it.

the DE 10 2007 035 006 A1 describes an improved method and an improved device for the contactless transmission of data from and / or to a multiplicity of data or information carriers. After information has been exchanged between a reading and / or writing device and a data or information carrier, this is switched to a standby impedance state, which differs from an output impedance, in order to reduce undesirable interaction with the antenna field of neighboring data or information carriers -State and communication impedance states during the transmission of an information signal from the data or information carrier.

TASK UNDERLYING THE INVENTION

It would therefore be desirable to enable more effective and efficient transmission in terms of time in the case of RFID transponders, in particular sensor transponders.

SOLUTION ACCORDING TO THE INVENTION

A read-write device is therefore proposed which is configured to prepare communication or data transmission to a predetermined transponder in a separation phase using a communication protocol in order to communicate with the predetermined transponder in a data exchange phase following the predetermined separation phase, wherein the read-write device is configured to send a plurality of commands to the predetermined transponder in the predetermined data exchange phase before a next isolation phase begins. In other words, the read-write device is configured to, for example, direct / transmit a command that may conform to ISO 18.000-6 to the transponder connected to it, as a result of which at least one further command is executed by the transponder, which, for example, results in the transmission of sensor data. A transmission of a large number of, for example, sensor data without exchanging data or information for a further separation phase between the read-write device and the transponder enables a higher reading rate of the information of the transponder or a sampling rate of sensors of the sensor-transponder. This means that the time normally required for exchanging identification data as part of a “handle” or an “inventory” recognition process for exchanging another value or data package can now be used for exchanging one or more values or data packages . This increases the efficiency when using the read / write device together with the coupled transponder. In the context of the invention, a data exchange phase is understood to mean data transmission or communication between a read-write device and at least one transponder.

Another aspect relates to a transponder which is configured to be put into a command acceptance state by a read-write device in a predetermined isolation phase using a communication protocol, and to be able to use the read-write device in a data exchange phase following the predetermined isolation phase. Device to communicate, wherein the transponder is configured to process a plurality of commands from the read-write device in the predetermined data exchange phase. Analogously to the read-write device described above, the transponder connected to such a read-write device, for example a sensor transponder, is able to execute more than one command or more than one value / data packet with the one coupled to it Exchange read / write device without having to initiate a new separation phase for each individual data packet. The advantages that apply to the read / write device described above can equally be transferred to a transponder used with it.

Yet another aspect relates to a method for communication or data transmission between a read-write device and at least one transponder using a communication protocol, in which the at least one transponder is put into a command acceptance state after a predetermined isolation phase in order to switch to the predetermined To communicate with the read / write device following the isolation phase, so that the transponder processes a plurality of commands from the read / write device in the predetermined data exchange phase. Analogously to the read-write device or the transponder connected to it, the advantages outlined above also apply to the method used with it for communication with one another. The method allows more efficient use of the data transmission rate between the read / write device and at least one transponder connected to it. The data transfer rate - also data transfer rate, data rate - denotes the amount of digital data that is transmitted over a transmission channel within a period of time.

PREFERRED EMBODIMENT OF THE INVENTION

Advantageous training and further developments, which can be used individually or in combination with one another, are the subject of the dependent claims.

The advantageous embodiments and technical effects described for the read-write device, the transponder and the method for communication between the read-write device and the transponder apply to the same extent individually and in combination with one another.

In the context of the exemplary embodiments, a transponder is understood to be a radio communication device that receives incoming signals and automatically responds to or forwards them. The term transponder is a briefcase word from the terms transmitter and responder. Passive transponders are systems that draw the energy required for communication and for processing internal processes exclusively from the field of the sender / receiver unit or read / write device. Passive transponders do not need their own power supply, but can only work over short distances. In contrast, active systems have their own energy supply. They either have a built-in battery or are connected to an external power supply. This not only enables greater communication ranges, it also enables the management of larger data memories and the operation of integrated sensors.

Payload in the sense of the exemplary embodiments is understood to mean those data of a data packet transported during communication between two partners - here read / write device and transponder (s) that contain no control or protocol information, for example addressing data for isolation. Useful data include sensor / measurement data. In the case of interleaved protocols (protocol stacks), however, the designation user data depends on the protocol under consideration: user data is then also understood to mean data packets extended by the header information required for the protocol in order to carry out the protocol. The data received are transferred to the underlying protocol layer - and can in turn represent user data from the perspective of this protocol.

In one embodiment, the read-write device is further configured to prepare a further communication to a further predetermined transponder in a predetermined further isolation phase, at least one predetermined command of the plurality of commands being no transponder address parameters or a transponder address parameter based on the predetermined and the further predetermined transponder applies, so that the at least one command is directed to the predetermined and the further predetermined transponder. After a clear identification or "isolation" of a transponder, the read / write device is configured to make a clear assignment of individual or multiple commands to the corresponding / respective transponder without also having to issue a Address / addressing must be done. By shortening the transponder address parameter with which a specific transponder is addressed, the data packets sent to the predetermined transponder can also be shortened. This makes it possible to increase the effective data throughput and the data transmission rate at which the read / write device reads and / or writes values / data packets from the transponder, saving time and thereby increasing the sampling rate of a sensor of a sensor transponder, for example. In addition, shortening the addressing or isolation of a first transponder also enables faster addressing of further transponders to be interrogated, the data throughput and data transmission rate of which can also be increased.

According to one embodiment, the read / write device is configured to enable the plurality of commands to the predetermined transponder by means of an enable command to the predetermined transponder. By means of the activation command, the read / write device can put the predetermined transponder in a state in which it can transmit, for example, abbreviated commands or further commands without additional addressing - to the transponder in question. This bypasses the respective isolation phase for selecting the relevant transponder on the basis of the addressing. For example, a release command would instruct the transponder to accept further read commands, for example to read sensor data from one and the same memory / storage register of the transponder. Both the activation command and the reader commands, which do not contain the address content, can avoid a data overhead, instead of which so-called useful data can be transmitted. This enables a higher data throughput - of user data - and a resulting higher sampling rate of a sensor coupled to the transponder or to the transponder, the data / measured values of which can be transmitted.

According to one embodiment, at least one command of the plurality of commands which are sent from the read / write device to the relevant transponder is free of a read address parameter. In the context of the invention, read address parameters and, in a broader understanding, address parameters are understood to mean, for example, transponder addresses - identification numbers - or memory addresses of individual memory registers of the memory of a transponder. By avoiding the transmission of a read address parameter, the commands can be shortened as a whole, with the amount of data transmitted being shortened. As a result, the data throughput of the user data can also be increased, since instead of the amount of data saved, user data can now be transmitted between the read / write device and the transponder. As a result, both the release command itself can be a shortened command and the other commands transmitted after it. If certain addressing is necessary, the activation command, which is transmitted to the respective transponder in advance of the subsequent shortened commands for separation, can be provided with a shortened address that can depend on the number of transponders to be addressed. In order to be able to address four different transponders, for example, only 2 bits would be used for addressing.

According to a further exemplary embodiment, the read / write device is configured so that the at least one command is a read command that causes a response from the predetermined transponder in order to allow a shortened response that is shorter as the response of the predetermined transponder to the at least one command , as responses of the predetermined transponder to other read commands of the read-write device. In other words, the at least one command can cause the read-write device in cooperation with the relevant transponder to exchange abbreviated commands or responses between the read-write device and the transponder in response to the at least one command, which is a read command . By shortening the at least one command and the subsequent further commands, the transmission of useful data between the read / write device and the relevant transponder can be additionally optimized. The transmission of useful data would thus be increased considerably the more shortened commands are exchanged between the read / write device and the transponder between two isolation phases.

According to one embodiment, the read-write device is configured to prepare communication to one or more predetermined transponders in one or more predetermined isolation phases using a communication protocol in order to be able to exchange data with the one or more predetermined transponders in a data exchange phase following the predetermined isolation phase To communicate transponders, wherein the read-write device is configured to send a read command to the one or more predetermined transponders in the predetermined data exchange phase, and wherein the read command does not have a transponder address parameter in order to address all of the one or more transponders, or has a transponder address parameter that addresses a number from the one or more transponders via addresses that are shorter than transponder addresses that are used during the isolation phase, and / or wherein the read command does not read eadressparameter, for example a memory register of the memory of the transponder.

According to one embodiment, the transponder is configured to be placed in a command acceptance state by a read / write device in a predetermined isolation phase using a communication protocol, and to communicate with the read / write device in a data exchange phase following the predetermined isolation phase , wherein the transponder is configured to process a plurality of commands from the read-write device in the predetermined data exchange phase.

For example, the transponder can be put into a state by means of an activation command of the read-write device in which it can receive and transmit commands without additional addressing or further shortened commands from the transponder in question, for example. As a result, the respective isolation phase for selecting the relevant transponder and addressing the transponder for each further command can be bypassed. For example, a release command from the read / write device would instruct the transponder to accept further read commands, for example to read sensor data from one and the same memory / storage register of the transponder. A data overhead can be avoided with the release command as well as with the read commands that do not contain the address content, instead of which so-called useful data can be transmitted. This enables a higher data throughput - of user data - and a resulting higher sampling rate of a sensor coupled to the transponder or to the transponder, the data / measured values of which are transmitted.

According to a further exemplary embodiment, the transponder is advantageously configured to issue the plurality of commands process without entering the next isolation phase from the command acceptance state. In such a state, the transponder acts as a means of communication for the transmission of, for example, sensor values to a receiving read / write device that either processes this data further itself or forwards it for processing. The read / write device can transmit commands or control commands to the transponder as a function of the data / values received from the transponder to the transponder without a further / renewed isolation phase to receive further / renewed isolation phase and to react to them.

To increase the data throughput between the read / write device and the transponder communicating with it, at least one predetermined command of the plurality of commands received by the transponder has no transponder address parameters or only one transponder address parameter. For example, data can be transmitted between the read / write device and the transponder by first addressing by means of a command with only one address parameter, with none of the other commands that can be received by the transponder from the read / write device Address parameters included. As a result, the size of the transmitted data packets can be reduced or, in the case of a predetermined / fixed size of the data packets, the portion of the useful data during the transmission can be increased.

According to one exemplary embodiment, the transponder is configured to activate the plurality of commands from the read / write device in response to an activation command from the read / write device. The activation command switches the transponder into an operating mode in which the transponder successively executes a plurality of preferably identical commands. According to a further exemplary embodiment, the transponder is also configured to process different commands. In a further exemplary embodiment, a program located in a memory of the transponder can be triggered by an activation command, for example, to sample successive data / sensor values and to transmit them directly to the read / write device without being read from the read / write device to be prompted for each individual data / sensor value.

In a further exemplary embodiment, at least one command of the plurality of commands which are transmitted to the transponder by the read / write device is free of a read address parameter, for example of memory addresses of a memory or intermediate memory coupled to the transponder. By shortening the data volume of data packets that are received or transmitted by the transponder, the transmission can be optimized to achieve a higher transmission efficiency. In other words, the data throughput is increased, i. H. the amount of digital data that is transmitted over a transmission channel over a period of time.

According to one embodiment, at least one predetermined command of the plurality of commands is a read command, wherein the transponder is configured to send a shortened response to the read / write device to the at least one predetermined command, which is shorter than responses to other read commands of the Read-write devices other than the predetermined command. In other words, the predetermined read command corresponds to a release command that allows shortened responses for communication or data transmission between the read / write device and the transponder. The shortened answers also represent a reduction in the amount of data transmitted or to be transmitted, which is reflected in the optimization of the data throughput.

In a further embodiment, the transponder is configured to process a read command from the read / write device in the predetermined data exchange phase by the transponder sending a response to the read / write device, the read command not having a transponder address parameter and the transponder configuring is to process a further read command from the read-write device, and to extract an address parameter from the further read command, or has a transponder address parameter that addresses a number from the one or more transponders via addresses that are shorter than one Transponder address that the transponder uses during a separation phase and / or wherein the read command has no read address parameters and the transponder is configured to process a further read command from the read / write device and to extract a read address parameter from the further read command. Such a transponder can be used particularly flexibly and can be adapted particularly easily to the needs of the user or to a read-write device addressing this transponder in order to enable transmission with a high data throughput.

To implement the transmission options described above, the method according to an exemplary embodiment has no transponder address parameter or - only - one transponder address parameter for at least one predetermined command of the plurality of commands. Only by commands that compared to conventional Commands that are used in the transmission between the read / write device and the transponder are shortened, a higher data throughput can be achieved. I. E. also that the more shortened commands are transmitted between two isolation phases in a transmission between a read-write device and a transponder connected to it, the more efficient the transmission. In other words, the efficiency increases when transmitting useful data relative to the number of transmitted data packets without address parameters.

According to one embodiment, the majority of the commands of the majority of the commands directed to the transponder are enabled by means of an enable command of the plurality of commands - on the part of the read / write device. This also means that during a transmission of data, for example at a desired point in time, by means of an activation command, the commands following this activation command can be shortened, and thus the data throughput for the transmission of data / data packets following this desired point in time can be increased .

In one embodiment of the method, at least one command of the plurality of commands is free of a read address parameter, for example of the transponder and / or a memory register of the transponder.

According to one exemplary embodiment of the method, the at least one command is a read command that causes a response in order to allow, as the response to the at least one command, a shortened response that is shorter than responses to other read commands from the read / write device.

According to one embodiment, several transponders are put into a transmission mode via the activation command transmitted to them - the several transponders - in each case by the read / write device, in which the data packets of the several transponders transmitted by means of the shortened commands according to a predetermined clock schedule, for example using a predetermined Time schedule and / or depending on a number of coordinated data packets to be transmitted to be transmitted to the read-write device. The activation command can activate a predetermined number of shortened commands that follow it and / or the activation command can activate a transmission with shortened commands for a predetermined time interval. This enables, for example, the transmission of measured values and / or sensor data at a selected point in time or for a selected period of time Read / write device and the associated transponder can be used. In this way, for example, different transponders can be successively addressed or singled out by a read-write device at a predetermined timing and their data packets, for example sensor data, can be queried further analysis can be used. In one embodiment, the number of data packets and / or the time span assigned to the respective transponder can be different.

The present exemplary embodiments enable a switch to a data transmission mode by means of a predetermined activation command, in which shortened commands are exchanged, whereby the data throughput can be increased in the transmission of useful data that are transmitted by means of the shortened commands.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantageous configurations are described in more detail below with reference to an exemplary embodiment shown in the drawing, to which the invention is not limited, however. The reference signs in the claims do not have a restrictive effect, but are only intended to improve their readability.

• 1 vereinfacht anhand eines Blockdiagramms Komponenten eines Systems für eine optimierte Übertragung von Daten gemäß einem Ausführungsbeispiel;
• 2 ein Beispiel für eine Speicher-Lese-Operation zwischen einem Lese-Schreib-Gerät und einem Transponder gemäß dem Stand der Technik;
• 3 eine optimierte Speicher-Lese-Operation zwischen einem Lese-Schreib-Gerät und einem Transponder gemäß einem Ausführungsbeispiel.

They show schematically:

• 1 simplified with the aid of a block diagram, components of a system for optimized transmission of data according to an exemplary embodiment;
• 2 an example of a memory read operation between a read-write device and a transponder according to the prior art;
• 3 an optimized memory read operation between a read-write device and a transponder according to an embodiment.

DETAILED FIGURE DESCRIPTION

In the following description of preferred embodiments of the present invention, the same reference symbols designate the same or comparable components. The reference symbols in all claims do not have a restrictive effect, but are only intended to improve their readability. Method steps that are shown in a block diagram and explained with reference to the same can also be found in FIG in a different order than the one shown or described. In addition, method steps that relate to a specific feature of a device are interchangeable with precisely this feature of the device, and this also applies the other way round.

1 shows the components of a system in a simplified manner by means of a block diagram 100 for an optimized transmission of data according to an embodiment. The system 100 includes a read-write device 10 , which is set up, information with at least one transponder coupled therewith 20th to exchange. The coupling is done, for example, by the read / write device 10 generated electromagnetic alternating fields 70 in short range or by high-frequency radio waves. About the alternating electromagnetic fields 70 are not just data or data packets 50 transmitted, but also the transponder 20th supplied with energy. In the present embodiment according to 1 can optionally supply the transponder 20th with energy via a specially designed energy supply 24 are provided.

In particular, such a power supply 24 to achieve greater ranges when transmitting data or data packets 50 between the read-write device 10 and the transponder 20th provided.

The read-write device 10 contains a software or a microprogram that enables the transmission to the transponder 20th controls. In addition, the read-write device can 10 with other IT systems and / or databases - hereinafter referred to as host 60 called - via an interface using middleware 80 get connected.

The transponder 20th includes a transponder address that identifies it 21 with which he is facing the read-write device 10 can clearly identify and via which the transponder 20th clearly from the read-write device 10 can be addressed. Depending on the embodiment, the transponder 20th even an optional memory 22nd include multiple memory addresses 23 for storage registers in which it can store data. Furthermore, in further exemplary embodiments, the transponder 20th a controller 26th include, for example, targeted individual memory addresses 23 of memory 22nd of the transponder 20th can drive. According to yet another exemplary embodiment, the transponder 20th for example a sensor 30th include whose scanned values, for example, as data in memory addresses 23 of memory 22nd can be saved. The in the memory addresses 23 of memory 22nd written data can be stored volatile or permanently. For the purposes of the invention, for example, transponder addresses 21 - Identification numbers - or memory addresses 23 individual storage registers of the memory 22nd of a transponder 20th understood as read address parameters or address parameters.

The transmission of data packets 50 via the electromagnetic alternating field 70 between the read-write device 10 and the transponder 20th can take place according to an exemplary embodiment using a standardized protocol, for example in accordance with ISO 18000-6. In 2 is an example of a memory read access of the read-write device 10 on the transponder 20th illustrated in accordance with the prior art.

To read or write access to the transponder 20th To be able to do this, an access code, a so-called "handle", must have been exchanged with it. Initially, this can only be done through a recognition process called "inventory".

The read / write device determines during the "inventory" 10 all in its alternating electromagnetic field 70 located transponder 20th , where he is their singular identification number, ie their transponder address 21 read. Has the read-write device 10 all transponder addresses 21 determined, he can use it to identify each individual transponder 20th address and carry out further manipulations, in particular reading and / or writing in memory areas 21 , 23 of the transponder 20th . The maximum validity of the "handle" can be up to the time the carrier field or electromagnetic alternating field is switched off or left 70 be maintained. This means that a separation mechanism must be carried out before read or write access. Is the transponder 20th For example, access is restricted by keys or cryptographic methods, so further operations are required to activate the transponder 20th necessary.

As soon as the read-write device 10 the individual / respective transponders 20th are known, the read-write device 10 the respective transponder 20th address and / or a memory 22nd of the respective transponder 20th read out and / or write. However, data is transferred between the read-write device 10 and the transponder 20th only a certain amount of data is possible per transmission step, so that, for example, a larger memory 22nd of the transponder 20th takes a long time and to access individual memory addresses 23 of memory 22nd to be able to access, whereby the individual steps for generating a "handle" have to be carried out multiple times, which in comparison to the A large data overhead arises for the user data to be transmitted.

2 shows a complete read access to a memory word or a memory address 23 of a transponder 20th . For the required separation process, only the required transponder is displayed in line 1 using the "SELECT" command 20th via its known, unique identification number or its transponder address 21 selected. The separation mechanism is started in line 2, but with a parameter “Q” = 0: only exactly one (2 ^∧ 0 = 1) slot is selected. The transponder then responds 20th directly to the "QUERY" command, which is confirmed with the "ACK" command in line 3 and in line 4 the "handle" for the following accesses is specified with the "REQRN" command.

This process is standard IS018000-6 defined using a state diagram. Read access to the transponder then takes place in line 5 using the “handle” determined 20th . Destination address or transponder address 21 and length to be read from the memory address 23 of memory 22nd of the transponder 20th are defined via the parameters transmitted in the command. The duration of the response depends on the amount of data to be read. In the exemplary embodiment, this is in accordance with 2 a 16 bit word. In the exemplary embodiment, reading out a 16-bit word including negotiating the “handle” (2537 + 1058 + 2333 + 1724 + 12333) takes µs = 20.0 ms. Reading every additional 16-bit word with the same "handle" would take another 12.3 ms, for example. Measurements on various standard Ident transponders and sensor transponders can show that these measured values correspond to a minimum due to the protocol processes. The specific response time also depends on the speed of the processes in the transponder 20th himself off.

According to one exemplary embodiment, one and the same transponder is used in order to avoid the resulting data overhead during the data transmission of a plurality of useful data 20th , for example several data packets 50 , which are in individual memory addresses 23 of memory 22nd of the respective transponder 20th are stored, a release command is provided, with the help of which a new or repetitive inventory or handle procedure for manipulating the memory 22nd of the respective transponder 20th is avoided.

In 3 For example, a predetermined command, for example a quick readout command 101 listed, with the help of which a data overhead when transferring data or data packets 50 between a read-write device 10 and a transponder 20th is deliberately restricted. An activation command that corresponds to the quick readout command 101 precedes, switches one or more of the subsequent fast read commands 101 free. As a quick readout command 101 can in this embodiment of the 3 an abbreviated read command can be understood that is sent to a specific memory address without data overhead 23 can access. The technical effects and advantages detailed below when using a predetermined command or rapid readout command 101 like him in 3 is shown, relate equally to a method or a fast readout command 101 communication protocol used 28 , as well as those involved in a transmission using the method with the fast read command 101 technical components involved, for example a read-write device 10 as well as at least one connected / coupled transponder 20th . In a preferred embodiment, the predetermined command is encoded 101 according to an ISO 18.000 - 6 compliant coding in order to be able to use the transmission standard consistently. In this way, for example, certain transponders 20th multiple transponders 20th can be addressed selectively and set to a data transmission by means of shortened addresses or commands. In other words, by means of the predetermined command 101 and the activation command preceding it, a minimization of the communication steps necessary for data transmission by means of a specially and directly addressed command 101 or activation command reached. This is, for example, in the case of the transmission of sensor data from a sensor 30th that are in memory addresses 23 of a memory 22nd of a transponder 20th are present, particularly advantageous, since this enables, for example, a more efficient use of the sensor 30th - increased sampling rate - can be guaranteed.

In other words, the predetermined command or rapid readout command represents 101 , also called "Fastsense", represents an optimized command for sensor interrogation. The transponder answers when this command is received 20th without one of a standardized communication protocol 28 provided addressing mechanism immediately with a transmission of one or more sensor values. The command can have been activated beforehand by means of a corresponding one-time activation command. The quick readout command 101 can have a minimized address parameter or a memory address 23 included if a selective readout of several sensors 30th and / or transponders 20th should be realized. The address parameter or the memory address 23 is then optimized for the application to the smallest possible size.

The predetermined command or activation command - has the property, following an isolation phase, in which a read-write device 10 a specific transponder 20th identified and using a communication protocol 28 a communication / transmission to a predetermined transponder 20th prepared for in a data exchange phase following the separation phase with the predetermined transponder 20th to communicate with the read-write device 10 is configured to send a plurality of commands to the predetermined transponder in the predetermined data exchange phase 20th to be sent before the next separation phase begins. In other words, the quick readout command enables 101 a transmission of data packets 50 without for each of the transponders 20th to the read-write device 10 transmitted data packet 50 having to carry out a separation phase each time, which would otherwise take up additional time and bandwidth for the transmission. As a result, the data transfer rate of user data between the read-write device 10 and the transponder 20th increase.

In a further exemplary embodiment, the predetermined command or rapid readout command can alternatively or additionally 101 also include single or multiple commands that are configured, no transponder address parameters 21 or just a transponder address parameter 21 for the initial identification of the corresponding transponder 20th to include who is on at least one predetermined transponder 20th applies, so that the at least one predetermined command or fast sensor command 101 on the at least one or more of the predetermined transponders 20th is directed. According to this exemplary embodiment, the predetermined command is used, for example, to provide a shortened address for identifying and then addressing the transponder 20th to the transponder 20th for the transmission of data packets 50 sent. By shortening the transponder address 21 can data packets 50 be reduced in size or in data packets 50 with a fixed size space for further information is created, which leads to more efficient data transfer between the read-write device 10 and the transponder 20th can be used.

In yet another exemplary embodiment, as an alternative or in addition to what has been said above, at least one predetermined command of a plurality of commands can be transmitted between the read-write device 10 and the at least one transponder 20th are transmitted, free of address parameters of the memory address 23 of memory 22nd of the respective at least one transponder 20th be. For example, a specific memory address 23 of a memory 22nd can be addressed in a first step in order to be read out successively several times without a new separation phase for the individual transponder 20th and the relevant memory address 23 to have to initiate. This also applies if the transponder 20th a memory 22nd with multiple memory addresses 23 having, after a separation phase the - several - memory addresses 23 of memory 22nd of the transponder 20th can be read out and / or written to without a further isolation phase. In yet another exemplary embodiment, several are successively using the same read / write device 10 connected transponder 20th who have a memory 22nd with multiple memory addresses 23 have, for example read out and / or described in accordance with a timing plan. The number of memory addresses read out and / or written to can be varied 23 of the respective transponder 20th differ from each other.

In a particular embodiment, the memory is 22nd of the transponder 20th with a sensor 30th tied together. The sensor 30th can, for example, sample values in at least one memory address 23 of memory 22nd write in periodically, for example according to a predetermined time schedule. In a further embodiment, at least one memory address 23 or several memory addresses 23 of the same memory 22nd sequentially with samples from the sensor 30th are occupied by means of a predetermined command, for example a quick readout command 101 , successively from the reader / writer 10 can be read out without a further separation phase between the read-write device 10 and the respective transponder occupied with the sampled values of the sensor 20th perform. In yet another embodiment, individual samples are extracted from specific memory addresses 23 multiple transponders 20th , each with sensors 30th are provided, successively from the read-write device 10 read out and / or written to without any between the respective transponders 20th and the read-write device connected to them 10 a renewed isolation phase when reading out and / or writing to individual memory addresses 23 of memory 22nd of the respective transponder 20th must be made.

For example, in the case of a transponder 20th that with a sensor 30th is connected, an initialization phase and measurement phase are separated from each other in order to only use transponders in the measurement phase 20th to access that have been enabled in advance via a predetermined command or an enable command for a higher data throughput. This allows different transponders 20th from the read-write device 10 be addressed simultaneously and / or sequentially and an optimal coordination between the read-write device 10 and the respective associated transponders 20th guaranteed.

In a still further exemplary embodiment, on the basis of the predetermined command or the rapid readout command 101 a length of the transponder address 21 and / or the memory address 23 of memory 22nd of the respective transponder 20th when transferring data packets 50 between the read-write device 10 and the respective transponder 20th be shortened. This allows, for example, with a fixed packet size of the data packets 50 , the proportion of user data in the data packet 50 can be increased, thereby the data throughput between the read-write device 10 and the respective transponder 20th is increased. In addition, by reducing the number of address bits as a result of the shortened length of the transponder address 21 and / or the memory address 23 of memory 22nd of the respective transponder 20th an addressing of the individual transponders 20th or the individual memory addresses 23 of the transponder 20th be accelerated.

To further accelerate the transfer between the reader / writer 10 and the associated transponder 20th can, for example, by means of predetermined commands or the quick readout command 101 sampled sensor values by a controller 26th of the transponder 20th can be reduced to a minimum number of bits for data transmission.

In a further exemplary embodiment, for example, a “response” from a transponder 20th to the predetermined command or quick readout command 101 for example through signal preprocessing of the controller 26th to a minimum number of bits - one bit for yes / no decisions - for data transmission between the read-write device 10 and the associated transponder 20th be reduced.

The features disclosed in the above description, the claims and the drawings can be important both individually and in any combination for the implementation of the invention in its various configurations.

List of reference symbols

100

system

1 to 5

Lines of the log

101

fast readout command (predetermined command)

10

Read-write device

20th

Transponder

21

Transponder address

22nd

Storage

23

Memory address

24

power supply

26th

steering

28

Communication protocol

30th

sensor

50

Data / data packets (electromagnetic waves UHF; energy)

60

Host (computer that provides services)

70

alternating electromagnetic field

80

Middleware

Claims (12)

Read / write device (10) that is configured to in order to prepare a communication to a predetermined transponder (20) in a predetermined isolation phase using a communication protocol (28) and in order to communicate with the predetermined transponder (20) in a data exchange phase following the predetermined isolation phase, wherein the read-write device (10) is configured to send a plurality of commands to the predetermined transponder (20) in the predetermined data exchange phase before a next isolation phase begins; and wherein at least one predetermined command of the plurality of commands is a read command which causes a response from the predetermined transponder (20) in order to allow a shortened response that is shorter than the response of the predetermined transponder (20) to the at least one predetermined command Responses of the predetermined transponder (20) to other read commands of the read-write device (10). Read-write device (10) according to Claim 1 , which is further configured to prepare a further communication to a further predetermined transponder (20) in a predetermined further isolation phase, at least one predetermined command of the plurality of commands no transponder address parameters (21) or a transponder address parameter (21) based on the predetermined and the further predetermined transponder (20) applies, so that the at least one predetermined command is directed to the predetermined and the further predetermined transponder (20). Read-write device (10) according to Claim 1 or 2 , which is configured to use a release command to the predetermined transponder (20) the Enable a plurality of commands to the predetermined transponder (20). Read-write device (10) according to one of the preceding Claims 1 until 3 wherein at least one of the plurality of commands is free of a read address parameter (21, 23). Transponder (20) that is configured in order to be put into a command acceptance state by a read-write device (10) in a predetermined isolation phase using a communication protocol (28), and in order to communicate with the read-write device (10) in a data exchange phase following the predetermined separation phase, wherein the transponder (20) is configured to process a plurality of commands from the read-write device (10) in the predetermined data exchange phase; and wherein at least one predetermined command of the plurality of commands is a read command (101) and the transponder (20) is configured to send an abbreviated response to the reader / writer (10) to the at least one predetermined command which is shorter than responses to other read commands from the reader / writer (10) . Transponder (20) Claim 5 configured to process the plurality of commands without entering a next isolation phase from the command acceptance state. Transponder (20) according to one of the preceding Claims 5 until 6th which is configured to activate the plurality of commands of the read / write device (10) in response to an activation command of the read / write device (10). Transponder (20) according to one of the preceding Claims 5 until 7th wherein at least one of the plurality of commands is free of a read address parameter (21, 23). Method for communication between a read-write device (10) and at least one transponder (20) using a communication protocol (28), in which the at least one transponder (20) is placed in a command acceptance state after a predetermined isolation phase in order to be able to use a to communicate with the read-write device (10) following the predetermined separation phase, so that the transponder (20) processes a plurality of commands from the read-write device (10) in the predetermined data exchange phase; and where at least one predetermined command of the plurality of commands is a read command (101) which causes a response, in order to allow, as the response to the at least one predetermined command, a shortened response which is shorter than responses to other read commands of the read-write device (10). Procedure according to Claim 9 wherein the plurality of the commands of the plurality of commands directed to the transponder (20) are enabled by means of an enabling command of the plurality of commands. Method according to one of the Claims 9 until 10 wherein at least one of the plurality of commands is free of a read address parameter (21, 23). Method according to one of the Claims 9 until 11 , whereby several transponders (20) are put into a transmission mode via the activation command transmitted to them by the read / write device (10) in which the data packets (50) transmitted by means of the abbreviated commands, the several transponders (20) according to a predetermined timing plan are transmitted to the read-write device (10).

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