WO2021151881A1

WO2021151881A1 - Optimized data transmission for uhf transponders

Info

Publication number: WO2021151881A1
Application number: PCT/EP2021/051738
Authority: WO
Inventors: Andreas Heinig; Andreas Weder
Original assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Priority date: 2020-01-27
Filing date: 2021-01-26
Publication date: 2021-08-05
Also published as: DE102020200953B4; DE102020200953A1

Abstract

The invention presents a design in which a reader/writer (10) can interchange data packets with at least one predetermined transponder (20) more efficiently. The reader/writer (10) and the transponder (20) are configured so that the reader/writer (10) uses a communication protocol (28) in a predetermined singularization phase to prepare for communication with the predetermined transponder (20), in order to communicate with the predetermined transponder (20) in a data interchange phase that follows the predetermined singularization phase. The reader/writer (10) and the transponder (20) are configured to interchange a plurality of data packets (50) in the predetermined data interchange phase before a next singularization phase begins.

Description

Optimized data transmission for UHF transponders

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

RF1D (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 the 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 additional time segments in the entire process, which elapse between the end of the transmission of the read / write device and the start of a response from the transponder . 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 by means of a recognition process, also called “inventory”, whereby the validity of the “handle” can be maintained at most until the electromagnetic carrier field is switched off or exited. 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.

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 associated one 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 transferred 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 are used for Communication and the energy required for processing internal processes can only be obtained 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 be those data of a data packet that are 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, wherein at least one predetermined command of the plurality of commands does not have any transponder address parameters or a transponder address parameter that is 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 certain transponder is addressed, the transponder can sent data packets can also be shortened. As a result, 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 can be increased, 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 lack 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 saved Amount of data, user data can now be transferred 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 interaction 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 Transponders to communicate, 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 has no transponder address parameter to all of the one or more transponders address, 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 where the read command does not have a read address parameter, for example a memory register of the memory of the transponder , having.

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 itself transmit commands without additional addressing or further abbreviated commands from the transponder in question. 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 in the case of the activation command as well as the read commands that lack the address content, and so-called useful data can be transmitted in its place. 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 process the plurality of commands without entering a 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 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 transfer 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 from the read / write device is free of a read address parameter, for example of memory addresses of one with the Transponder-coupled memory or intermediate memory. 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, ie the amount of digital data that is transmitted over a transmission channel within 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 is configured 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, as a 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 a 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. A higher data throughput can only be achieved with commands that are shortened in comparison to conventional commands that are used in the transmission between the read / write device and the transponder. 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 shortened by means of the Commands transmitted data packets of the plurality of transponders 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, are 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. They show schematically:

1, using a block diagram, simplifies components of a system for optimized transmission of data according to an exemplary embodiment;

2 shows an example of a memory read operation between a read / write device and a transponder according to the prior art;

3 shows an optimized memory read operation between a read / write device and a transponder according to an exemplary 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 carried out in a sequence other than that 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, in a simplified manner using a block diagram, components of a system 100 for an optimized transmission of data according to an exemplary embodiment. The system 100 comprises a read-write device 10 which is set up to exchange information with at least one transponder 20 coupled to it. The coupling takes place, for example, through electromagnetic alternating fields 70 generated by the read / write device 10 within a short range or through high-frequency radio waves. Not only data or data packets 50 are transmitted via the electromagnetic alternating fields 70, but the transponder 20 is also supplied with energy. In the present exemplary embodiment according to FIG. 1, the transponder 20 can optionally be supplied with energy via a specially provided energy supply 24. In particular, such an energy supply 24 is provided to achieve greater ranges when transmitting data or data packets 50 between the read / write device 10 and the transponder 20.

The read / write device 10 contains software or a microprogram that controls the transmission to the transponder 20. In addition, the read / write device 10 can be connected to further EDP systems and / or databases - hereinafter referred to as host 60 - via an interface by means of a middleware 80.

The transponder 20 includes a transponder address 21 that identifies it, with which it can uniquely identify itself to the reader / writer 10 and via which the transponder 20 can be uniquely addressed by the reader / writer 10. Depending on the embodiment, the transponder 20 itself can optionally include a memory 22 which has a plurality of memory addresses 23 for memory registers in which it can store data. Furthermore, in further exemplary embodiments, the transponder 20 can comprise a controller 26, which can, for example, specifically control individual memory addresses 23 of the memory 22 of the transponder 20. According to yet another exemplary embodiment, the transponder 20 can include, for example, a sensor 30, the sensed values of which can be stored, for example, as data in memory addresses 23 of the memory 22. The data written in the memory addresses 23 of the memory 22 can be stored in a volatile or fixed manner. For the purposes of the invention, for example, transponder addresses 21 — identification numbers — or memory addresses 23 of individual memory registers of the memory 22 of a transponder 20 are 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 20 can take place according to an exemplary embodiment by means of a standardized protocol, for example according to ISO 18000-6. FIG. 2 shows, by way of example, a memory read access of the read / write device 10 to the transponder 20 according to the prior art.

In order to be able to carry out read or write access to the transponder 20, 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". During the “inventory”, the read / write device 10 determines all of the transponders 20 located in its electromagnetic alternating field 70, reading their singular identification number, ie their transponder address 21. Once the read / write device 10 has determined all the transponder addresses 21, it can use it to address each individual transponder 20 and carry out further manipulations, in particular reading and / or writing in memory areas 21, 23 of the transponder 20. The maximum validity of the “handle” can be up to to switch off or leave the carrier field or electromagnetic alternating field 70 are maintained. This means that a separation mechanism must be carried out before read or write access. If access to the transponder 20 is restricted, for example by means of a key or cryptographic method, further operations are required to activate the transponder 20.

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

Fig. 2 shows a complete read access to a memory word or a memory address 23 of a transponder 20. For the required separation process, exactly only the desired transponder 20 via its known unique identification number or its transponder address 21 is selected in line 1 using the “SELECT” command. The separation mechanism is started in line 2, but with a parameter "Q" = 0: only one (2 ^L 0 = 1) slot is selected. As a result, the transponder 20 responds directly to the “QU ERY” command, which is confirmed with the “ACK” command in line 3 and the “handle” for the following accesses is specified in line 4 with the “REQRN” command. This process is defined in the IS018000-6 standard using a state diagram. In line 5, read access to the transponder 20 takes place using the determined “handle”. The target address or transponder address 21 and the length to be read from the memory address 23 of the memory 22 of the transponder 20 are determined by the parameters transmitted in the command. The duration of the response depends on the amount of data to be read. In the exemplary embodiment according to FIG. 2, this is a 16-bit word. In the exemplary embodiment, reading out a 16-bit word including negotiating the “handle” (2537 + 1058 + 2333 + 1724 + 12333) takes ps = 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 ID 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 20 itself.

According to one embodiment, an activation command is provided to avoid the resulting data overhead when transmitting multiple user data from one and the same transponder 20, for example multiple data packets 50, which are stored in individual memory addresses 23 of the memory 22 of the respective transponder 20 repetitive inventory or handle procedure for manipulating the memory 22 of the respective transponder 20 is avoided.

In FIG. 3, a predetermined command, for example a fast read-out command 101, is listed by way of example, with the aid of which a data overhead in the transmission of data or data packets 50 between a read / write device 10 and a transponder 20 is deliberately restricted. An activation command which precedes the fast readout command 101 activates one or more of the subsequent fast readout commands 101. In this exemplary embodiment in FIG. 3, a shortened read command which can access a specific memory address 23 without data overhead can be understood as a fast read command 101. The technical effects and advantages detailed below when using a predetermined command or fast readout command 101, as shown in FIG Transfer with the procedure with the Fast readout command 101 involved technical components, for example a read-write device 10 and at least one connected / coupled transponder 20. In a preferred embodiment, the predetermined command 101 is encoded according to ISO 18000-6-compliant encoding in order to use the transmission standard consistently to be able to. In this way, for example, certain transponders 20 of several transponders 20 can also be addressed selectively and set for data transmission by means of shortened addresses or commands. In other words, by means of the predetermined command 101 and the enabling command preceding it, the communication steps necessary for a data transmission are minimized by a specially and directly addressed command 101 or enabling command. This is particularly advantageous, for example, in the case of the transmission of sensor data from a sensor 30, which are present in memory addresses 23 of a memory 22 of a transponder 20, since this can ensure, for example, a more efficient use of the sensor 30 - increased sampling rate.

In other words, the predetermined command or fast read command 101, also called "Fastsense", represents an optimized command for sensor interrogation several sensor values. The command can have been activated beforehand by means of a corresponding one-time activation command. The fast read-out command 101 can contain a minimized address parameter or a memory address 23 if a selective read-out of several sensors 30 and / or transponders 20 is to be implemented. The address parameter or the memory address 23 is then optimized to the smallest possible size for a specific application.

The predetermined command or clearing command - has the property, following an isolation phase, in which a reader / writer 10 identifies a specific transponder 20 and, using a communication protocol 28, prepares communication / transmission to a predetermined transponder 20 in order to be able to enter to communicate with the predetermined transponder 20 in a data exchange phase following the isolation phase, the read-write device 10 being configured to to send a plurality of commands to the predetermined transponder 20 in the predetermined data exchange phase before a next separation phase begins. In other words, the fast read command 101 enables data packets 50 to be transmitted without having to carry out a separation phase for each data packet 50 transmitted from the transponder 20 to the reader / writer 10, which would otherwise take up additional time and bandwidth during the transmission . As a result, the data transmission rate of useful data between the read / write device 10 and the transponder 20 can be increased.

In a further exemplary embodiment, the predetermined command or quick readout command 101 can alternatively or additionally also include individual or multiple commands that are configured not to include any transponder address parameters 21 or only one transponder address parameter 21 for the initial identification of the corresponding transponder 20, which is based on at least a predetermined transponder 20 applies, so that the at least one predetermined command or fast sensor command 101 is directed to the at least one or more of the predetermined transponders 20. According to this exemplary embodiment, for example, a shortened address for identification and subsequent addressing of the transponder 20 is sent to the transponder 20 for the transmission of data packets 50 by means of the predetermined command. By shortening the transponder address 21, data packets 50 can be reduced in size or space can be created in data packets 50 with a fixed size for further information that can be used for more efficient data transmission between the read / write device 10 and the transponder 20.

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

In a particular embodiment, the memory 22 of the transponder 20 is connected to a sensor 30. The sensor 30 can, for example, periodically write sampled values into at least one memory address 23 of the memory 22, for example in accordance with a predetermined timing plan. In a further exemplary embodiment, at least one memory address 23 or several memory addresses 23 of the same memory 22 can be sequentially assigned samples from the sensor 30, which are successively read out by the read-write device 10 by means of a predetermined command, for example a fast read-out command 101, without to carry out a further separation phase between the read / write device 10 and the respective transponder 20 which is occupied with samples from the sensor. In yet another exemplary embodiment, individual sampled values are successively read out and / or written to from specific memory addresses 23 of a plurality of transponders 20, which are each provided with sensors 30, by the reader / writer 10, without there being any between the respective transponders 20 and the the read / write device 10 connected to them, a new separation phase must be carried out when reading and / or writing to individual memory addresses 23 of the memory 22 of the respective transponder 20.

For example, in the case of a transponder 20 that is connected to a sensor 30, an initialization phase and a measurement phase can be separated from one another in order to only access transponders 20 in the measurement phase that have previously been issued via a predetermined command or an activation command for a higher data throughput have been unlocked. As a result, different transponders 20 can be addressed simultaneously and / or sequentially by the read / write device 10 and one optimal coordination between the read-write device 10 and the respective transponders 20 connected to it can be guaranteed.

In yet another embodiment, a length of the transponder address 21 and / or the memory address 23 of the memory 22 of the respective transponder 20 during the data transfer of data packets 50 between the read / write device 10 and the respective Transponder 20 can be shortened / be. As a result, for example with a fixed packet size of the data packets 50, the proportion of useful data in the data packet 50 can be increased, whereby the data throughput between the read / write device 10 and the respective transponder 20 is increased. In addition, addressing the individual transponders 20 or the individual memory addresses 23 of the transponder 20 can be accelerated by reducing address bits due to the shortened length of the transponder address 21 and / or the memory address 23 of the memory 22 of the respective transponder 20.

To further accelerate the transmission between the read / write device 10 and the transponder 20 connected to it, sensor values scanned by predetermined commands or the fast read command 101 can be reduced by a controller 26 of the transponder 20 to a minimum number of bits for data transmission, for example.

In a further exemplary embodiment, for example, a “response” from a transponder 20 to the predetermined command or fast read command 101 can be made, for example, by signal preprocessing of the controller 26 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 20 are 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. REFERENCE LIST

100 system

1 to 5 lines of the log

101 fast readout command (predetermined command)

10 Read / write device

20 transponders

21 transponder address

22 memories

23 memory address

24 Energy supply

26 Control

28 Communication protocol

30 sensor

50 data / data packets (electromagnetic waves UHF; energy)

60 host (computer that provides services)

70 alternating electromagnetic field

80 middleware

Claims

PATENT CLAIMS

1. Read-write device (10) which is configured to prepare communication with a predetermined transponder (20) in a predetermined isolation phase using a communication protocol (28) and to exchange data with the predetermined transponder in a data exchange phase following the predetermined isolation phase Transponder (20) to communicate, wherein the read-write device (10) is configured to send a plurality of commands to the predetermined data exchange phase to the predetermined transponder (20) before a next separation phase begins.

2. 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 not having any transponder address parameters ( 21) or a transponder address parameter (21) which applies to the predetermined and the further predetermined transponder (20), so that the at least one predetermined command is directed to the predetermined and the further predetermined transponder (20).

3. Read-write device (10) according to claim 1 or 2, which is configured to activate the plurality of commands to the predetermined transponder (20) by means of an activation command to the predetermined transponder (20).

4. Read-write device (10) according to one of the preceding claims 1 to 3, wherein at least one of the plurality of instructions free from one

Read address parameter (21, 23).

5. Read-write device (10) according to one of the preceding claims 2 to 4, which is configured so that the at least one command is a read command that causes a response of the predetermined transponder (20) to be used as the response of the predetermined Transponder (20) to allow a shortened response to the at least one command, which is shorter than responses of the predetermined transponder (20) to other read commands of the read-write device (10).

6. Read-write device (10) which is configured to prepare a communication to one or more predetermined transponders (20) in one or more predetermined isolation phases using a communication protocol (28) in order to prepare for the predetermined isolation phase to communicate the following data exchange phase with the one or more predetermined transponders (20), the read-write device (10) being configured to send a read command (101) to the one or more predetermined transponders (20) in the predetermined data exchange phase to send, wherein the read command (101) does not have a transponder address parameter (21) to address all of the one or more transponders (20), or has a transponder address parameter (21) which has a number from the one or more transponders (20) via addresses addressed that are shorter than transponder addresses (21) that are used during the isolation phase, and / o the wherein the read command (101) does not have a read address parameter (21, 23).

7. Transponder (20) which is configured to be put into a command acceptance state in a predetermined isolation phase using a communication protocol (28) by a read-write device (10), and in a data exchange phase following the predetermined isolation phase to communicate with the read-write device (10), the transponder (20) being configured to process a plurality of commands from the read-write device (10) in the predetermined data exchange phase.

8. The transponder (20) according to claim 7, which is configured to process the plurality of commands without entering a next isolation phase from the command acceptance state.

9. Transponder (20) according to claim 7 or 8, wherein at least one predetermined command of the plurality of commands has no transponder address parameter or a transponder address parameter.

10. Transponder (20) according to one of the preceding claims 7 to 9, which is configured to activate the plurality of commands of the read-write device (10) on an activation command of the read-write device (10).

11. Transponder (20) according to one of the preceding claims 7 to 10, wherein at least one command of the plurality of commands is free of a read address parameter (21, 23).

12. Transponder (20) according to one of the preceding claims 7 to 11, wherein at least one predetermined command of the plurality of commands is a read command (101) and the transponder (20) is configured to send a shortened response to the at least one predetermined command to the reader / writer device (10), as responses to other read commands from the read / write device (10).

13. Transponder (20) which is configured to process a read command from the read-write device (10) in the predetermined data exchange phase by the transponder (20) sending a response to the read-write device (10) , wherein the read command (101) does not have a transponder address parameter and the transponder (20) is configured to process a further read command from the read / write device (10) and to extract an address parameter or a T from the further read command has transponder address parameters that address a number from the one or more transponders (20) via addresses that are shorter than a transponder address (21) that the transponder (20) uses during a separation phase, and / or wherein the read command (101) has no read address parameters (21, 23) and the transponder (20) is configured to process a further read command from the read-write device (10) and a read address from the further read command to extract parameters (21, 23).

14. A 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 to communicate with the read-write device (10) in a data exchange phase 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.

The method of claim 14, wherein at least one predetermined command of the plurality of commands is none

Having transponder address parameters or a transponder address parameter

16. The method according to claim 14, wherein the plurality of the commands of the plurality of commands directed to the transponder (20) are enabled by means of an enable command of the plurality of commands.

17 The method according to any one of claims 14 to 16, wherein at least one instruction of the plurality of instructions is free of one

Read address parameter (21, 23).

18. The method according to any one of claims 14 to 17, wherein the at least one command is a read command (101) which causes a response in order to allow a shortened response as the response to the at least one command, which is shorter than responses to others Read commands from the read-write device (10).

The method according to one of claims 14 to 18, wherein 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 ), the plurality of transponders (20) are transmitted to the read-write device (10) according to a predetermined timing plan.