Abstract: A radio frequency communication system, method, and device operate in the VHF, UHF, or SHF range, where a controller controls the radio-frequency communication range provided by the VHF, UHF, or SHF radiation.

Abstract: A device, such as a radio frequency identification (RFID) device, includes a receiver to receive interrogation signals transmitted over a first frequency band from an RFID reader device. The device includes a transmitter to transmit a notification signal over a second frequency band to a computing device (e.g., a mobile phone) in response to receiving a particular interrogation signal at the receiver. The computing device is distinct from the RFID reader device and the second frequency band is distinct from the first frequency band. The notification signal includes data indicating that the particular interrogation signal was received at the device.

Abstract: Systems, methods and computer program products for detecting and re-personalizing are provided herein. In an embodiment, the invention operates by obtaining an ID (i.e., an identification, such as a Dynamic Unique Identifier) from a RFID tag, generating a new ID, and writing the new ID to the RFID tag. The ID read from the tag is used to lookup a subject's record in a database. If the write of the new ID to the tag is verified, then database changes are committed to link the new ID to the subject. In an alternative embodiment, the invention operates by obtaining data from a memory of a RFID tag, wherein the memory has a first partition and a second partition, generating a new ID, and writing the new ID to either of the first partition or the second partition of the RFID tag. If such write is verified, then the new ID is written to the other partition of the RFID tag. The data from the tag is used to lookup a subject's record in a database.

Abstract: A device, such as a radio frequency identification (RFID) device, includes a receiver to receive interrogation signals transmitted over a first frequency band from an RFID reader device. The device includes a transmitter to transmit a notification signal over a second frequency band to a computing device (e.g., a mobile phone) in response to receiving a particular interrogation signal at the receiver. The computing device is distinct from the RFID reader device and the second frequency band is distinct from the first frequency band. The notification signal includes data indicating that the particular interrogation signal was received at the device.

Abstract: Systems and methods to detect cross reads in RFID tags are disclosed. Existing RFID reading mechanisms do not have the provision of detecting cross reads and eliminating the cross reads while performing inventory of an area. As a result, the user will have to manually determine the cross reads from the data and eliminate them. The disclosed method employs a RFID reader that is equipped with a plurality of engines for performing scan on the inventories. The scanned data is processed by a processing unit. In the processing unit, normalization is performed on the scanned data, neighboring assets and spatial location maps are created. The data from the above processes is employed for detecting cross reads during the scan. The identified cross reads are eliminated based on various other parameters obtained by analyzing scanned data.

Abstract: Radio Frequency Identification (RFID) tags may receive one or more run commands, prior to being singulated, that specify one or more programs for the tag to execute. A run command may encapsulate the programs, in which case the tag may execute or store and execute the program(s). A run command may alternatively specify programs stored on the tag. The tag may execute the program(s) upon receipt, upon a trigger event, serially or in parallel, and/or may modify the instructions or program(s) by adjusting parameters. A reader may tell the tag to execute the instructions or program(s) via the run command or another command which, in some cases, may be sent prior to tag singulation. A tag may, based on a result of the executed program(s), determine whether to participate in a subsequent inventory round, modify a behavior during a subsequent inventory round, or store the result in tag memory.

Abstract: Radio Frequency Identification (RFID) readers may transmit one or more run commands specifying one or more programs for tag execution prior to tag singulation. A run command may encapsulate the program(s), in which case a tag may store or store and execute the program(s). A run command may alternatively specify programs stored on a tag. The reader may instruct a tag to execute the program(s) upon receipt, upon a trigger event, serially or in parallel, and/or may cause the tag to modify the program(s) by adjusting parameters. The reader may instruct tags to execute the program(s) via the run command or another command, which may be sent prior to tag singulation. A reader may cause a tag to determine whether to participate in a subsequent inventory round, modify a behavior during a subsequent inventory round, or store a result in a tag memory, based on the executed program(s).

Abstract: A sight spot guiding system and an implementing method thereof are provided. The method includes: a mobile terminal equipped with an RFID chip, after arriving at the sight spot, receiving a radio broadcast signal transmitted by an RFID reader set at the sight spot, and transmitting a radio response signal which carriers the ID of the present RFID chip; the RFID reader reading the radio response signal and then reporting the IDs of the RFID chip and the reader to an administration center, which, after receiving the IDs of the RFID and the reader, sends sight spot description information corresponding to the ID of the reader to the mobile terminal corresponding to the ID of the RFID chip, according to corresponding relationships between IDs of RFID readers and sight spot description information and between IDs of RFID chips and mobile terminals.

Abstract: A method and a data carrier for contactless communication of a reading device with at least two communication-ready applications located on a portable data carrier. A first communication-readiness signal is generated for a first application and sent to the reading device, the signal having a first identification number that is assigned to the first application and indicates to the reading device the communication readiness of said first application, and a second communication-readiness signal is generated and sent for a second application, the second signal having a second identification number different from the first identification number, which is assigned to said second application and indicates to the reading device the communication readiness of the second application. The identification numbers simulate for the reading device the communication readiness of a data carrier in each case. The reading device thus has the impression of communicating with applications of two separate data carriers.

Abstract: Where a single cable conveys bidirectional RF signals and bidirectional data using a data carrying DC power signal where the RF signals and the bidirectional data carrying DC power signal are separated using frequency selective networks. Alternatively a single cable conveys bidirectional RF signals and bidirectional data using a modulated RF data signal where the RF signals and the bidirectional modulated RF data signal are separated using frequency selective networks. A array of switchable antennas where RF switching elements are integral to the antennas is connected to the single cable and is powered by and communicated with through the cable. The array of switchable antennas can be arranged to produce an interrogation field in any of one, two or three dimensions by the antennas being arranged to provide for a series of parallel spaced conductors through which currents are sequentially switched in order to produce both tangential and normal magnetic field components.

Abstract: A detection unit positioned on a package includes a magnet, a first magnetic switch, a second magnetic switch, a processor, and a clock. The first magnetic switch outputs a first control signal or a second control signal according to magnetic flux density of the magnet. The second magnetic switch outputs a third control signal or a fourth control signal according to the magnetic flux density of the magnet. The first control signal is the same as the third control signal; the second control signal is the same as the fourth control signal. When the processor receives the first control signal and the third control signal at the same time, the processor reads a first real-time clock (RTC) signal from the clock. When the processor receives the second control signal and the fourth control signal at the same time, the processor reads a second RTC signal from the clock.

Abstract: An object is to provide a data processing device which achieves multiple functions or easy additional providing of a function while suppressing adverse influence on a communication distance or to improve resistance to electrostatic discharge in the data processing device. The data processing device includes an antenna which transmits and receives a first signal to/from a first terminal device through wireless communication, an integrated circuit which executes a process in accordance with the first signal, and a terminal portion which transmits and receives a second signal to/from a second terminal device and has an exposed conductive portion on its surface. A protection circuit is provided between at least one terminal of terminals of the terminal portion and a power supply terminal of a high potential and between the one terminal and a power supply terminal of a low potential.

Abstract: Methods and devices for enabling a user to obtain item information relating to an item (10), the item having associated therewith an item identification means (12) and an RFID response means (14) arranged to provide a predetermined response on being subjected to a currently applicable trigger signal; the method comprising steps of: establishing from the item identification means (12) item identification information; using the item identification information to determine from an item information source (30) a currently applicable trigger signal for the RFID response means (14); subjecting the RFID response means (14) to the currently applicable trigger signal; receiving a predetermined response from the RFID response means (14); and using the predetermined response to obtain item information from the item information source (30); wherein the RFID response means (14) is arranged to generate a new currently applicable trigger signal and a new predetermined response associated therewith following subjecting of th

Abstract: The patient identification system of the preferred embodiments includes a transponder that is affixed to a patient and functions to communicate information that identifies the patient to a device or series of devices. The series of devices includes at least a first device that collects data from the patient and communicates with the transponder. The patient identification system is preferably designed to identify a patient, and more specifically to identify a patient to be associated with the data collected by the device. The patient identification system, however, may be alternatively used in any suitable environment and for any suitable reason.

Abstract: The system for controlling vehicle ignition provides three separate levels of access to prevent unauthorized users from actuating ignition of a vehicle. The system includes a radio frequency identification tag having permanent computer readable memory and volatile computer readable memory associated therewith. The radio frequency identification tag is preferably embedded within a vehicle key. A predetermined permanently assigned authentication code is stored in the permanent computer readable memory and a variable time stamp is stored in the volatile computer readable memory. The permanently assigned authentication code and the variable time stamp are transmitted upon activation of the radio frequency identification tag. Vehicle ignition occurs only upon the mechanical operation of the key in a conventional ignition switch and matching of both the permanently assigned authentication code and the variable time stamp with codes and stamps stored in vehicle memory.

Abstract: A method, system, and device provide asymmetric round-trip-time (RTT) ranging with multipath correction. A RTT ranging determination using the resulting composite received signal contains multipath error, and compensation or correction of this error in a manner compatible with low-power, low-complexity devices, such as tag devices, is provided.

Abstract: A transponder of a contactless data exchange system includes a unit to receive and transmit data provided with at least one first antenna loop and at least one second antenna loop in order to carry out a coupling with a reader. The transponder includes a phase shifter to shift a signal coming from the second loop by a phase shift of K*?, K being an odd integer greater than 0, to produce a phase shifted signal. The transponder includes an adder, to add a signal coming from said first loop and the phase shifted signal to produce a sum signal. The transponder also includes a unit to authorize or prevent a data transmission, depending on the sum signal. A reader of a contactless data exchange system includes a data sending/receiving unit provided with at least one antenna loop, at least one other antenna loop, and a phase shifter.

Abstract: There is provided a physical token for use in a defined venue with a server having communication with the physical token. The physical token may comprise an identification data and a transmitter configured to transmit the identification data. The physical token is configured to transmit the identification data to the server to cause the server to initiate a sensory interaction with a user possessing the physical token. The sensory interaction may comprise a character in the defined venue interacting with the user possessing the physical token. The sensory interaction may also comprise a display screen in the defined venue displaying information to the user possessing the physical token. The sensory interaction may further comprise an audio speaker in the defined venue announcing information to the user possessing the physical token. The physical token may represent an affinity comprising an experience, entitlement, or characteristic of the user possessing the physical token.

Abstract: A method associated with a UWB RFID system provides for receiving a data transmission transmitted using UWB and accessing data within the data transmission using a communications protocol. An initial portion of the data transmission defines a structure of the data transmission such that subsequent data in the data transmission is directly accessible without additional decoding.

Abstract: A transponder communication system and method for communicating with a transponder in an electronic toll collection system. A roadside reader attempts to program the transponder in a normal mode in which a programming signal is transmitted to a first coverage area. If the programming attempt in the normal mode is unsuccessful, the reader attempts to program the transponder in an enhanced mode in which a programming signal is transmitted to a second coverage area. The coverage area is adjusted after the programming attempt in the normal mode by using an adjacent antenna to the antenna used to transmit in the normal mode or by increasing the power of the programming signal to a level that is greater than the level used to transmit the programming signal in the normal mode.

Abstract: A playmate toy or similar children's toy is provided having associated wireless, batteryless ID tag that can be read from and/or written to using a radio-frequency communication protocol. The tag is mounted internally within a cavity of the toy and thereby provides wireless communication of stored information without requiring removal and reinsertion of the tag. In this manner, a stuffed animal or other toy can be quickly and easily identified non-invasively, without damaging the toy. Additional information (e.g., unique personality traits, special powers, skill levels, etc.) can also be stored on the ID tag, thus providing further personality enhancement, input/output programming, simulated intelligence and/or interactive gaming possibilities.

Abstract: A system has a storage bin used to hold a product and a product storage rack intended to hold the storage bin. The storage bin is provided with a near field communication (NFC) tag device and the product storage rack is provided with a NFC antenna device cooperable with the NFC tag device. The NFC antenna device and the NFC tag device are used to determine a relative position of or orientation of the storage bin relative to the product storage rack for the purpose of automatically determining if replenishment of the product within the product storage rack is required.

Abstract: A sensing system comprises a material having a matrix structure in which a plurality of sensing elements are embedded, the sensing elements having electron distribution and/or transport properties that change in response to a change in a physical or chemical property of the material. The sensing system further comprises a receiver, including an antenna, the receiver arranged to receive a source RF signal and a returned RF signal, the returned RF signal being received from the material. A change in the electron distribution and/or transport properties of the sensing elements cause the source RF signal to change, such that a change in a property of the material can be determined from the returned RF signal. A corresponding method of sensing a change in a property of a material is also provided.

Abstract: Transaction processing in an offline environment for a prepaid product comprising a portable consumer device includes responding to presentation of the prepaid product at a reader for offline processing by initiating operation of the prepaid product, receiving data from the prepaid product at the reader that indicates the prepaid product is associated with a prepaid account balance, determining that the prepaid product is in a negative balance condition, and taking preventive action in response to the negative balance condition such that future acceptance of the prepaid product at a reader is prevented.

Abstract: Systems for identifying and categorizing distributed devices, e.g., lighting fixtures and thermostats, is disclosed. In an embodiment, a user (200) sends a low power discovery message to devices (201) using a portable programming tool (100). The devices (201) within range respond with identification information. The portable programming tool (100) organizes the responses by proximity and sends a “flash” message to the device with the closest perceived proximity. That device responds with a visual or audible signal (202), allowing the user (200) to determine whether that device is the one intended for selection. If so, the user initiates a store routine in which identification information, including category information, is stored in one or more locations, such as, the selected device (201), the portable programming tool (100), and/or a central or local controller (1100). The identification and categorization can, for example, be used to automate load shedding and to reduce energy consumption.

Abstract: A computerized vehicle control system and device for limiting the functionality of a mobile asset (e.g., vehicle) capable of performing a plurality of mobile asset functions. The device includes an asset monitor, a mobile wireless transceiver, and a mobile asset processor. The asset monitor is in communication with a first mobile asset for collecting monitored data associated with the first mobile asset. The mobile wireless transceiver is adapted to interface with a management computer. The mobile asset processor is adapted to receive the monitored data from the asset monitor; determine that a first mobile asset function of the plurality of mobile asset functions should be limited; and limit operation of the first mobile asset function. The mobile asset control device can be adapted to override the functionality of the mobile asset, based on the navigation, relative location of the mobile asset, or business rules.

Abstract: A portable consumer device includes a base, and a computer readable medium on the base. The computer readable medium comprises code for an issuer verification value and a supplemental verification value. The issuer verification value is used by an issuer to verify that the portable consumer device is authentic in an on-line transaction and the supplemental verification value is used to verify that the portable consumer device is authentic in an off-line transaction.

Abstract: A method and RF SIM card communication system using a tag recognition to control the RF communication range, a tag for providing data information is installed on a mobile communication terminal equipped with an RF SIM card, a tag reader module for reading out and transmitting the data information is installed on an RF card reader device, setting a card reading condition for the card reader device as: under the condition that the tag reader module reads out the tag data information, the RF card reader module, based on the data information of the tag, establishes wireless communication link with and transfers data to the RF SIM card in the mobile terminal. The present invention is not affected by the shielding effect of the mobile communication terminal, thereby avoids the cumbersome calibration process for the RF SIM card transceiver power and receiver sensitivity in existing technologies, this both brings convenience to the users, and further facilitates of widespread use of RF SIM cards.

Abstract: A method for card-reading anti-collision with automatic frequency hopping is provided, which is used for a system in which a card reader simultaneously reads a plurality of cards in radio frequency identification technologies. The method comprises: both the card reader and the cards to be read are configured to have an automatic frequency-sweep function and a function of hopping from a current channel to another channel, and to store access addresses and transaction addresses; when the card reader is in a frequency-hopping card-seeking state, it is in an n-channel frequency-hopping working state, in which, the access address of each channel is the same, and the card reader reads the cards by means of hopping frequencies in a sequence iteratively through n channels. When the card reader detects that two or more cards collide, the card reader sends a command of random frequency hopping, making all the conflicting cards to hop to other channels randomly and to wait to access those channels.

Abstract: Methods and systems for automatic provisioning of RFID devices in an RFID network are described. A device, such as a Reader, has within its read field a special EPC Identity (ID) Tag that is specifically encoded for that Reader. When the Reader boots up, it reads the special ID Tag. The Tag has fields formatted according to the EPCglobal standards and certain bits within one of the fields indicates that the Tag is an EPC ID Tag and the data contained in the Tag will be used to provision the Reader. The Reader transmits an IP multicast packet containing data from the Tag to a network device referred to as a personality class appliance which receives the IP multicast packet. Thus, the Reader is an IP multicast sender and the appliance is an IP multicast receiver. Upon receiving the packet, the appliance retrieves configuration parameters for the Reader. These parameters collectively make up a personality class for the Reader. The personality data are transmitted back to the Reader via a unicast message.

Abstract: Transaction processing involves receiving data from an access transaction application of a portable consumer device, wherein the received data comprises data from an access transaction data string that includes a transit verification value wherein, with the exception of the transit verification value, the access transaction data string is substantially similar to a retail data string comprising retail data, wherein the access application data string is adapted for use with an access transaction processing system and the retail data string is adapted for use with a retail processing system. The transaction processing involves processing access transaction application data for selective authorization of the transaction.

Abstract: Reader (201) for determining the validity of a connection to a transponder (202) wherein the reader (201) is designed to measure a response time of a transponder (202) based on a time interval between sending a first binary code based on predefined numbers to said transponder (202) and receiving a second binary code from said transponder (202) in response to the first binary code and wherein the reader (201) is designed to authenticate the transponder (202) based on the received second binary code simultaneously with the measuring of the response time.

Abstract: A process management system uses a radio frequency identification (RFID) detection system in the form of, for example, a phased array antenna based RFID detection system to track and manage material storage and flow in a manufacturing process or plant. The process management system operates in conjunction with the various machines that implement manufacturing stages or steps of the manufacturing process to assure that the correct materials and processing procedures are used at or on the various production machines of the process to produce a particular product as defined by a job number or job order. The process management system is thereby able to increase the efficiencies of the plant and to increase the quality of the plant production by reducing or eliminating waste, manufacturing errors and shipping errors in the production facility.

Abstract: Provided are a terminal having a radio frequency identification (RFID) function and a method of processing information of the terminal for allowing intuitive interaction between a screen manipulation and an RFID manipulation with respect to using an RFID related service. The method of processing the information of the terminal including a screen and an RFID recognition unit, includes detecting a screen area corresponding to a position of the RFID recognition unit disposed at a predetermined position of the screen; displaying an RFID icon at a position of the detected screen area; recording information in an RFID tag based on the RFID tag contacting the RFID icon, and recognizing the information from the RFID tag the RFID tag contacting the RFID icon.

Abstract: A method, apparatus and system for radio frequency identification provides a modulated illumination signal containing a sequence of bits configured to illuminate a radio frequency identification (RFID) tag, The illumination signal is received at the RFID tag, rectified to generate a wake signal for waking a processor which is subsequently powered by a battery. The received illumination signal is sampled and subjected to a thresholding process. Mobile telephone band interference is countered by correlating the sampled illumination signal to determine its bit sequence and then correlating the bit sequence against a predetermined key. An identification signal from the RFID tag is sent in response to a match.

Abstract: A method of providing a service at a remote terminal including receiving information broadcast by a commercial radio station in a broadcast radio channel; discriminating an identifier of an application within the received broadcast information; initiating an authentication process for authenticating broadcast information received via the broadcast channel; and in response to a positive authentication, enabling use of information received via the broadcast radio channel by the identified application.

Abstract: A dual mode interrogation is carried out by sending narrow band radio frequency interrogation (RFID) signal for narrow band RFID communication units, the narrow band signal comprising substantially continuous periods, and by sending a high data rate RFID interrogation signal during the substantially continuous periods of the narrow band RFID signal so that two different types of RFID communication units are interrogated substantially simultaneously.

Abstract: A reader and method for adjusting the transmission time of a continuous wave (CW), wherein the method comprises setting an initial value for a response waiting time, sending the CW to a tag after sending a command to the tag and waiting for a response from the tag, judging whether the response from the tag is received within the response waiting time. If the response from the tag is received within the response waiting time, then sending of the CW is stopped and the response waiting time is adjusted. If the response from the tag is still not received beyond the response waiting time, then sending of the CW is stopped. The time for the reader to wait for a response from the tag is far less than 20 ms. Consequently, a command failure can be found early, so as to improve the processing efficiency of an RFID system.

Abstract: The invention is a method of managing a NFC transaction between two hosts and a reader device. The two hosts are embedded in NFC devices and are intended to be identified by the reader device during an anti-collision phase through a first identifier and a second identifier respectively. The first identifier comprises a variable part. The method includes the steps of generating the first identifier, the variable part of the first identifier and the second identifier comprising a common pattern, looking for a common pattern into the first and second identifiers on the reader device side, and if a common pattern is found and if the variable part of the first identifier comprises said common pattern, concluding that the first and second hosts are embedded in a unique NFC device.

Abstract: RFID tags, ICs for RFID tags, and methods are provided. In some embodiments, an RFID tag includes a memory with multiple sections, and a processing block. The processing block may map one of these sections, or another of these sections, for purposes of responding to a first command from an RFID reader. As such, an RFID tag can operate according to the data stored in the section mapped at the time. In some embodiments, a tag can even transition from mapping one of the sections to mapping another of the sections. This can amount to the tag exhibiting alternative behaviors, and permits hiding data on the tag.

Abstract: A security method that includes defining rules specifying permitted movements of passengers in a transportation terminal. Passengers entering the terminal may be issued a boarding pass having a Radio Frequency Identification (RFID) tag attached thereto. The location of the RFID tag may be measured and responsive to the measured location of the RFID tag, a violation of at least one of the rules by the passenger may be detected. An action with respect to the detected violation may be taken. The rules may define a region that is forbidden for access, a region in which the passengers are expected to be in motion, a region in which the passengers are expected not to be stationary for more than a given time period, etc.

Abstract: An electronic tag (8) displays and monitors a maintenance state of an associated electrically-powered device. The tag includes data storage (2) for storing data indicative of the maintenance state, the data comprising information defining an expiry date for the maintenance state. A data processing unit (3) monitors a remaining duration to the expiry date and a display (4) displays information indicative of the maintenance state. A cut-out unit (7) controllably enables transmission of electrical power to the associated electrically powered device dependent on the remaining duration.

Abstract: A RFID tag having a LED is provided. The RFID tag includes an antenna, a RF processor, a controller, a memory, at least one of LEDs, and a LED switching unit. The RF processor receives and transmits a wireless signal through the antenna, and modulates and demodulates transmitted and received signal and data. The controller analyzes a received data outputted from the RF signal processor and generally controls the RFID tag. The memory stores the received data in response to the controller. The LED switching unit turns on/off at least one of the LEDs in response to the controller.

Abstract: According to one embodiment of the present invention, a method for determining the location of a subject is provided.

Abstract: A management system for a container data center (CDC) includes at least one radio frequency identification (RFID) tag, a reader, a processor, an antenna module, and a wireless communication device. The RFID tag pre-stores data as to a manager of the CDC or electronic devices received in the CDC. The reader reads the data from the RFID tag, and outputs the data to the processor. The processor outputs a processing result according to the data, to the antenna module. The antenna module sends the processing result to the wireless communication device via a wireless communication system.

Abstract: An encrypted ID takes as its initial value a tag ID that constitutes an original ID of a wireless tag, and is encrypted using an encryption key each time an ID inquiry is received from a reader/writer. Another encrypted ID also takes the tag ID as its initial value, and is encrypted using an encryption key each time an ID inquiry is received. The wireless tag gives confidential variability to the ID by transmitting a combination of the encrypted ID and the another encrypted ID in reply. The reader/writer can obtain the original ID merely by decoding the two encrypted values until they match, and the decoding load does not increase even if the number of wireless tags that are reading targets increases.

Abstract: A system and method for preventing relay attack on a passive entry system (PES) or other passive system (PS) included within a vehicle or other entity. The relay attack prevention may be based in part on an assessment of whether the fob is able to distinguish signal strength relative to messages communicated form different antennas within the vehicle and/or amongst different signal amplitude communicated from the same antenna.

Abstract: This invention provides a system for operating RFID tags on a single-use connector. The system includes: a first single-use connector configured to receive a first RFID tag and a second single-use connector configured to receive a second RFID tag. The invention also includes a reader placed close to the first RFID tag and the second RFID tag. The reader is configured to: determine if the first RFID tag and the second RFID tag are gamma sterilized; determine if the first RFID tag and the second RFID tag were previously used; determine if the first RFID tag and the second RFID tag are authentic; and determine if the first RFID tag matches with the second RFID tag.

Abstract: The wireless information and safety system for mines of the present invention enables continuously tracking and monitoring underground miners and moveable equipment in underground mines using ZigBee-enabled active RFID devices forming a wireless network among them and other static and mobile ZigBee devices placed at strategic locations. The present invention provides a wireless information and safety system for mines comprises in combination of ZigBee-compliant devices (programmable to operate as end devices, routers and coordinators by hardware specific embedded software) and wireless sensor network (WSN) software having various application modules both for underground and opencast mines. Use of the system of the present invention would help in identifying the miners entering in underground mine to keep the track of the miners and maintain computerized attendance. This would help in monitoring equipment locations and their operation to improve productivity and reduce fatal collision accident.

Abstract: A method and a data carrier for contactless, in particular parallel, communication of a reading device with at least two communication-ready applications located on a portable data carrier. A first communication-readiness signal is generated for a first application and sent to the reading device, the signal having a first identification number that is assigned to the first application and indicates to the reading device the communication readiness of said first application, and a second communication-readiness signal is generated and sent for a second application, the second signal having a second identification number different from the first identification number, which is assigned to said second application and indicates to the reading device the communication readiness of said second application. The identification numbers simulate for the reading device the communication readiness of a data carrier in each case.