Abstract:
A system and methods for measuring the temperature of an RFID reader module and inserting a delay in the RFID reader&#39;s duty cycle to prevent the RFID reader from initiating a thermal shutdown. The system and methods are self-adaptable, therefore incurring the benefit regardless of the design of the RFID reader host and its associated heat sink. The system and methods also provide for archiving the collected data and analyzing the data providing the ability to improve the design of the RFID reader host.

Description:
TECHNICAL FIELD 
     The subject invention relates generally to radio-frequency identification (RFID), and more particularly to managing the duty cycle of an RFID reader module to prevent RFID reader module overheating and protective shutdown. 
     BACKGROUND 
     RFID technology has become prevalent in today&#39;s society as a means of identifying objects in transit. The objects can be anything from vehicles passing through a toll plaza on a highway and lost pets to merchandise leaving a store and parts traveling along on a manufacturing line. In each of the previously described examples, the mechanism is similar, an RFID tag, activated by an RFID reader, transmits its identity information to the RFID reader for further processing. 
     Typically, a vendor provides an RFID reader module to parties interested in developing an RFID system by incorporating the RFID reader module in a host device. The host device is responsible for powering the RFID reader module and providing an adequate heat sink to dissipate any heat buildup from the operation of the RFID reader module. In some cases, the host design is not sufficient to provide the heat sink necessary to prevent the reader module from overheating. 
     In today&#39;s RFID reader technology, the circuits powering the RFID reader module are power inefficient and lead to the buildup of heat in the RFID reader module. The RFID reader module provides overheating protection for itself by including a temperature-measuring component and control logic sufficient to shut down the RFID reader module if the RFID reader module approaches a temperature that would damage the RFID reader module. Although this system satisfies the need of protecting the RFID reader module, it is unacceptable to the host device for the reader module to become inoperative at just the time when the host is reading the greatest amount of RFID data. 
     In another shortcoming of the existing RFID systems, different host devices have different designs and requirements so it is unacceptable to design the reader module to include the heat dissipation capabilities necessary to prevent the RFID reader module from overheating in all circumstances. Market pressure is building to provide an RFID reader module that is more intelligent in its ability to regulate its operation and prevent itself from entering a thermal shutdown if the host device is not capable of dissipating heat at a rate sufficient to allow continued operation. 
     Accordingly, inefficiencies in existing RFID reader modules, variations in host device implementations and expectations for uninterrupted operation have created market demand for an RFID reader module that can automatically determine whether it is overheating and take steps to moderate its operation so it can continue to function without entering a thermal shutdown. 
     SUMMARY 
     The following presents a simplified summary in order to provide a basic understanding of some of the aspects described herein. This summary neither is an extensive overview nor intended to identify key or critical elements or to delineate the scope of the various aspects described herein. The sole purpose of the summary is to present some concepts in a simplified form as a prelude to the more detailed description presented later. 
     The disclosure describes systems and methods for monitoring the temperature of an RFID reader module and adjusting the duty cycle of the RFID reader module to prevent the RFID reader module from overheating and entering a thermal shutdown mode. The method modifies the existing control logic of an RFID reader module to analyze the temperature trend of the RFID reader module, and inserts a programmable delay mechanism into the duty cycle operation to reduce the duty cycle read rate and accordingly lower the amount of heat generated by the RFID reader module. The method is adaptive based on the heat dissipation characteristics and environmental conditions associated with the particular implementation and use of the RFID reader module. 
     In another aspect, the system can collect temperature trend data and duty cycle data from the RFID reader module for analysis and use in designing future generations of host devices. For example, a subsequent analysis of temperature trend data can determine if the heat sink is sufficient for intended operation by reviewing the reduction in duty cycle required to maintain operation of the RFID reader module. 
     To the accomplishment of the foregoing and related ends, certain illustrative aspects are described herein in connection with the following description and the annexed drawings. These aspects are indicative of various ways to practice the invention, all of which are intended to be covered herein. Other advantages and novel features may become apparent from the following detailed description when considered in conjunction with the drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates an embodiment of a system for controlling the duty cycle of an RFID reader module to prevent a thermal shutdown. 
         FIG. 2  illustrates the associated communication, measurement, analysis, control and storage components of an RFID reader module. 
         FIG. 3  illustrates the associated internal and external environment temperature measuring components of an RFID reader temperature measurement component. 
         FIG. 4  illustrates the associated control loop and duty cycle delay components of an RFID reader control component. 
         FIG. 5  illustrates an embodiment of a method of an RFID reader component collecting, archiving and distributing data on the operational temperature trends of the RFID reader component. 
         FIG. 6  illustrates an embodiment of a method of an RFID reader component sampling control data and adjusting the duty cycle of an RFID reader module to prevent thermal shutdown. 
         FIG. 7  illustrates a block diagram of an exemplary, non-limiting operating environment in which various aspects described herein can function. 
     
    
    
     DETAILED DESCRIPTION 
     Various embodiments are now described with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that the various embodiments can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing these embodiments. 
     As used in this application, the terms “component”, “module”, “system”, and the like are intended to refer to a computer-related entity, either hardware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a server and the server can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. 
     Furthermore, the one or more embodiments can be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques to produce software, firmware, hardware, or any combination thereof to control a computer to implement the disclosed embodiments. The term “article of manufacture” (or alternatively, “computer program product”) as used herein is intended to encompass a computer program accessible from any computer-readable device or media. For example, computer readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips . . . optical disks (e.g., compact disk (CD), digital video disk (DVD) . . . ), smart cards, and flash memory devices (e.g., card, stick). Additionally it should be appreciated that computer communication media includes a carrier wave that can be employed to carry computer-readable electronic data such as those used in transmitting and receiving electronic mail or in accessing a network such as the Internet or a local area network (LAN). Of course, those skilled in the art will recognize many modifications can be made to this configuration without departing from the scope of the disclosed embodiments. 
     Various embodiments are presented in terms of systems that can include a number of components, modules, and the like. It is to be understood and appreciated that the various systems can include additional components, modules, etc. and/or cannot include all of the components, modules, etc. discussed in connection with the figures. A combination of these approaches may also be used. 
       FIG. 1  is a block diagram overview of the thermally controlled duty cycle regulated system  100 . The thermally controlled duty cycle regulated system  100  comprises an RFID reader host component  102 , an RFID reader component  104  and an RFID tag component  106 . It should be noted that the RFID reader host component  102  is separate from the RFID reader component  104  and therefore does not necessarily meet all of operational requirements of the RFID reader component  104 . The RFID reader host component  102  incorporates the RFID reader component  104  and provides power to the RFID reader component and communications connectivity. In another aspect, the RFID reader host component  102  is expected to provide a heat sink for the RFID reader component  104  so excess heat can be removed from the RFID reader component. It should be noted that not all RFID reader host components are designed to provide a sufficient heat sink under all operating conditions of the RFID reader component  104 . 
     RFID reader component  104  provides the ability for interaction with the RFID reader host component  102  and the RFID tag component  106 . The RFID reader component  104  provides a communicative connection to the RFID reader host component  102  allowing the RFID reader host component  102  to send control commands such as a read command to the RFID reader component  104  and allowing the RFID reader component  104  to return temperature trend data to the RFID reader host component  102 . 
     In another aspect, the RFID reader component  104  provides the ability to measure the temperature of the RFID reader component  104  and optionally the surrounding environment. The temperature measurements obtained by the RFID reader component  104  are used as they are taken for analysis of the trend in heat generation, for controlling the heat generation through RFID tag component  106  read duty cycle control and for archiving for providing temperature trend data to the RFID reader host component  102 . 
     Further, the RFID reader component  104  provides the ability to analyze the temperature data with regard to the rate of read requests from the RFID reader host and the ambient temperature and provide predictive control for preventing thermal shutdown of the RFID reader component  104 . Additionally, the RFID reader component  104  provides the ability to insert a proportional delay in the duty cycle of the RFID reader component based on the temperature of the hardware implementing the RFID reader component  104 . The proportional delay allows the RFID reader component to continue functioning at a lower rate of reading under conditions that otherwise would require a thermal shutdown of the RFID reader component  104 . 
     In another aspect, the RFID reader component  104  provides the ability to store data associated with the RFID reader component. The stored data comprises data collected from the temperature measuring instrumentation, data based on the current configuration of the RFID reader component and system data required for the RFID reader component operation. 
     Further, the RFID reader component  104  can operate in a trigger mode. When the triggered mode is initiated by the RFID reader host component  102 , the RFID reader component  104  sets the duty-cycle to a peak read rate. The RFID reader component  104  maintains this peak read rate for the duration of the triggered cycle and only reduces the duty cycle to prevent thermal shutdown. 
     RFID tag component  106  provides a data source for the RFID reader component  104 . The RFID tag component  106  can remain stationary allowing the RFID reader component to pass by while reading. For example, the user can install the RFID reader component  104  in a handheld inventory control RFID reader host  102  device. A technician can then walk through the warehouse taking the inventory for later analysis. In another aspect, the RFID tag component  106  can be in motion with the RFID reader component  104  mounted in a stationary fashion. For example, the user can install the RFID reader component  104  in a RFID reader host  102  device mounted at a tollbooth with the RFID tag  106  component attached to a vehicle passing through the tollbooth. 
       FIG. 2  depicts an RFID reader component  104  comprising the host interface component  202 , the temperature measurement component  204 , the duty cycle analysis component  206 , the control component  208  and the storage component  210 . The host interface component  202  provides the ability to establish communications with the RFID reader host component  102 . In one aspect, the RFID reader host component  102  uses this interface to send commands to the RFID reader component  104 . For example, the RFID reader host component  102  device can send an RFID read tag command to the RFID reader component  104  causing the RFID reader component  104  to begin a read cycle. 
     In another aspect of the subject innovation, the RFID reader component  104  can use the host interface component  202  to send archived data from the storage component  210  to the host for further analysis and distribution. For example, a user can manually instruct the RFID reader component  104  to upload its database of archived temperature data so the user can determine the efficiency of operation of a newly designed RFID reader host component  102  device. 
     The temperature measurement component  204 , in one aspect, provides the ability to measure the temperature of the electrical hardware included in the implementation of the RFID reader component  104 . The hardware has an upper thermal limit of operation and is shutdown if the temperature of the hardware components reaches this limit. For example, in one non-limiting implementation, the design includes a thermocouple attached to the processor providing the computational power for the RFID reader component  104 . The temperature measurement component  204  reads temperature data from the thermocouple and provides the data to the analysis component  206  and the control component  208  for further action to protect the RFID reader component  104  from thermal shutdown. 
     In another aspect, the temperature measurement component  204  can provide the ability to measure the ambient temperature. For example, a non-limiting implementation can include a thermocouple thermally isolated from any heat generating hardware components and directed to reading the temperature of the environment surrounding the RFID reader component  104  and the RFID reader host component  102 . The temperature measurement component  204  can read temperature data from this thermocouple and provide the data to the analysis component  206  and the control component  208  for further action to protect the RFID reader component  104  from thermal shutdown. 
     The duty cycle analysis component  206  provides the ability to receive newly sampled data from the temperature measurement component  204  and archived data from the storage component  210 . The duty cycle analysis component  206  can then perform calculations allowing the prediction of the temperature trend of RFID reader component  104  with respect to the future rate at which the RFID reader component  104  can sample data from RFID tags  106  without reaching a temperature requiring a shutdown of the hardware components for thermal protection. 
     In one non-limiting example, the duty cycle analysis component  206  can extrapolate a linear prediction of the proportional delay for the duty cycle that allows the RFID reader component to operate at the maximum read rate without incurring a thermal shutdown. In another non-limiting example, the duty cycle analysis component  206  can implement an artificial intelligence component to perform an analysis on the real-time and historical temperature trend data and again determine the minimum allowable duty cycle delay to prevent the thermal shutdown of the RFID reader component  104 . 
     In another aspect, the duty cycle analysis component  206  can monitor configured trigger points including but not limited to clock times and temperature events to upload temperature profile data to the RFID reader host device. In one non-limiting example, the duty cycle analysis component  206  can monitor the temperature of the RFID reader component  104  for a temperature that exceeds at preconfigured value. When the RFID reader component  104  temperature exceeds the preconfigured value, the duty cycle analysis component  206  can upload the archived data from the storage component  210  to the RFID reader host component  102  for further analysis or for distribution to other locations. In another non-limiting example, the duty cycle analysis component  206  can determine that the duty cycle delay is at an unexpectedly high value for the rate of RFID tag  106  reading and ambient temperature. The duty cycle analysis component  206  can then notify the RFID reader host device  102  of an alarm indicating possible hardware failure. 
     Further, the duty cycle analysis component can generate reports providing information on the efficiency of operation of the RFID reader with respect to the thermal capabilities of the RFID reader host. For example, an efficiency report can illustrate that for a particular RFID reader, the RFID reader host requires a better heat sink for optimal operation in the current environmental setting. The duty cycle analysis component can also distribute the generated reports to other devices and locations for shared analysis. 
     The control component  208 , in one aspect, provides the ability to insert a delay element and the logic to set and update the delay value in the duty cycle loop of an RFID reader component  104 . The control component  208  receives information from the duty cycle analysis component  206  regarding the predicted behavior of the temperature trend for the RFID reader component  104 . Further, the control component  208  receives real-time temperature data from the temperature measurement component  204 . The control component adjusts the duty cycle delay value based on the real-time temperature data with a bias based on the predicted future temperature information. 
     In one non-limiting example, the control component can receive real-time temperature data from the temperature measuring component  204  requiring a greater proportional delay value for the control loop but also receives information from the duty cycle analysis component indicating a projected decline in ambient temperature. The scenario describes a worker transitioning from a heated office complex to an unheated warehouse in the winter months in a northern climate. The control component  208  can bias the change to the delay value based on the information that the ambient heat sink is becoming much more effective at dissipating heat and allowing the RFID reader component  104  to continue operating at a greater read rate than would normally be the case for the real-time temperature readings. 
     The storage component  210 , in one aspect, provides the ability to archive temperature data for analysis and uploading to the RFID reader host component  102  device. The storage component  210  maintains archived temperature data for as long as storage is available with the oldest data flushed as required. In another aspect, the storage component  210  maintains configuration data related to the operation of the RFID reader. For example, the storage component  210  maintains the value for the duty cycle delay and other parameters of the control loop to prevent their loss during loss of power situations. In another aspect, the storage component  210  provides the ability to maintain configured action events and clock times to allow the duty cycle analysis component to upload the temperature trend data based on the occurrence of one of the configured events or the passage of a configured clock time. 
       FIG. 3  depicts a temperature measurement component comprising an internal temperature measurement component  302  and a local environment temperature measurement component  304 . The internal temperature measurement component  302  provides the ability for the temperature measurement component  204  of the RFID reader component  104  to measure the temperature of the hardware components implementing the RFID reader component  104 . In one non-limiting example of the subject innovation, the internal temperature measurement component  302  is a thermocouple attached to the face of a processor performing the logic and calculations of the RFID reader component  104 . In another non-limiting example, the internal temperature measurement component  302  is a thermistor circuit intended for the temperature range of operation of the RFID reader component  104  hardware. 
     The local environment temperature measurement component  304  provides the ability to measure the ambient temperature surrounding the RFID reader component  104  and the RFID reader host component  102 . The environment temperature measurement component  304  is mounted in a location insulated from heat generated by the RFID reader component  104  and the RFID reader host component  102 . As described above for the internal temperature measurement component  302 , example non-limiting implementations of environment temperature measurement components  304  include thermocouples and thermistor circuits. 
       FIG. 4  depicts a control component  208  comprising a control loop component  402 , and a duty cycle delay component  404 . The control loop component  402  provides the ability to monitor the temperature inputs from the temperature measurement component  204  and execute a thermal shutdown of the RFID reader component  104  should the temperature reach a value known to harm the RFID reader component  104  hardware. In one non-limiting example, the control loop is a proportional-integral-derivative (PID) control loop tuned to the characteristics of the RFID reader component  104  hardware. 
     In another aspect of the control component  208 , the duty cycle delay component  404  integrates into the control loop component  402  and provides a mechanism for proportionally delaying the duty cycle of the RFID reader component  104 . In one non-limiting example, the duty cycle delay component is a location for storing a delay value that the control loop component  402  must count through on each pass of the control loop. 
     Referring now to  FIG. 5 , illustrated is a method for collecting, archiving and reporting temperature profile and duty cycle delay value data. Beginning at step  502 , a temperature measurement component  204  reads a temperature value from an internal temperature measurement component  302  and/or the local environment temperature measurement component  304 . The temperature measurement component  204  can time and date stamp the temperature data to preserve the chronology of the temperature data collection. 
     Next at step  504 , the collected and possibly time and date stamped temperature data is communicated to the storage component  210  for archiving. In addition to the temperature data, the duty cycle delay component  404  of the control component  208  can provide the duty cycle delay value for archiving. Similar to the temperature data, the duty cycle delay component can provide a time and date stamp of when the duty cycle delay component  404  changed the duty cycle delay value. 
     Next at step  506 , the provided data is archived on the storage component  210 . The storage component maintains the data in the order provided and on command will upload the data to the RFID reader host component  102 . The RFID reader host component  102  can trigger the upload manually or automatically, based on a previously defined event or time. After uploading, based on the user specified storage component  210  configuration, the storage component can delete the uploaded data from the storage component  210  to provide space for newly collected data. 
     Looking to figure  FIG. 6 , illustrated is a method  600  of managing the duty cycle of an RFID reader module to prevent the RFID reader module from overheating and thermal shutdown. Beginning at step  602 , the RFID reader component  104  receives an RFID read tag command from the RFID reader host component  102 . It should be noted that the RFID reader can receive and act on other commands received from the RFID reader host component  102 . For example, the RFID reader host component  102  can send a command instructing the RFID reader to upload archived data from the storage component  210  based configured events. Configured events include but are not limited to uploading data when the storage component nears full capacity, uploading data when a particular measured temperature is detected and uploading data when a particular clock time is reached. 
     At step  604 , the RFID reader component  104  sets the number of inventory rounds to perform. The user can select the number of inventory rounds from a default value maintained by the RFID reader component or supplied by the RFID reader component host  102  in the RFID read tag command sent to the RFID reader component  104 . 
     Next, at step  606 , the RFID reader component  104  sets the number of antenna cycles. The RFID reader component can contain more than a single antenna system and the RFID reader component  104  provides the ability to interrogate RFID tags enabled by the different antenna systems. At step  608 , the temperature measurement component  204  retrieves the module temperature of the hardware implementing the RFID reader component  104 . 
     Next, at step  610 , the RFID reader component  104  determines if the module temperature is greater than the predetermined high temperature value. If the module temperature is greater than the predetermined high temperature value, then the method  600  proceeds to step  612  and the control component  208  proportionally decreases the duty cycle rate by increasing the duty cycle delay. After decreasing the duty cycle rate, the method  600  continues to step  618  where the RFID reader component performs the read of the RFID tag  106 . If the module temperature is not greater than the predetermined high temperature value, then the method  600  proceeds to step  614  and the RFID reader component determines if the module temperature is lower than the predetermined low temperature value. If the module temperature is lower than the predetermined low temperature value, then the method  600  proceeds to step  616  and the control component  208  proportionally increases the duty cycle rate by decreasing the duty cycle delay. After increasing the duty cycle rate, the method  600  continues to step  618  where the RFID reader component performs the read of the RFID tag  106 . 
     Proceeding at step  620 , the method  600  inserts a delay in the duty cycle to slow the reading rate of the RFID reader component  104 . One non-limiting method of delay is by counting down from a predefined delay count to zero. Once the count reaches zero then the duty cycle loop can proceed to step  622 . In another non-limiting method, delay component  404  programs a timer with the predefined delay value and the timer notifies the delay component  404  when the delay time has expired. After receiving the notification, the duty cycle loop proceeds to step  622 . 
     Next, at step  622 , the method  600  determines if the number of inventory cycles is complete. If the number of inventory cycles is not complete then the method  600  returns to step  608  and continues with another iteration of retrieving the module temperature. If the number of inventory cycles is complete, then the method  600  continues to step  624 . Next, at step  624 , the method  600  switches antennas to inspect another frequency and/or antenna polarization and/or range and continues to step  628 . At step  628 , the method determines if the number of antenna cycles is complete. If the number of antenna cycles is not complete, then the method  600  returns to step  608  and continues with another iteration of retrieving the module temperature. If the number of antenna cycles is complete, then the method  600  proceeds to step  628  and an inventory is complete. 
       FIG. 7  illustrates an example of a suitable computing system environment  700  implementing the claimed subject matter. Although as made clear above, the computing system environment  700  is only one example of a suitable computing environment for a mobile device and is not intended to suggest any limitation as to the scope of use or functionality of the claimed subject matter. Further, the computing environment  700  is not intended to suggest any dependency or requirement relating to the claimed subject matter and any one or combination of components illustrated in the example computing environment  700 . 
     With reference to  FIG. 7 , an example of a remote device for implementing various aspects described herein includes a general purpose computing device in the form of a computer  710 . Components of computer  710  can include, but are not limited to, a processing unit  720 , a system memory  730 , and a system bus  721  that couples various system components including the system memory  730  to the processing unit  720 . The system bus  721  can be any of several types of bus structures including a memory bus or memory controller, a peripheral bus, and a local bus using any of a variety of bus architectures. 
     Computer  710  can include a variety of computer readable media. Computer readable media can be any available media accessible by computer  710 . By way of example, and not limitation, computer readable media can comprise computer storage media. Computer storage media includes volatile and nonvolatile as well as removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. 
     Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CDROM, digital video disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium usable to store the desired information and which can be accessed by computer  710 . 
     Communication media can embody computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and can include any suitable information delivery media. 
     The system memory  730  can include computer storage media in the form of volatile and/or nonvolatile memory such as read only memory (ROM) and/or random access memory (RAM). A basic input/output system (BIOS), containing basic routines that help to transfer information between elements within computer  710 , such as during start-up, can be stored in memory  730 . Memory  730  can also contain data and/or program modules that are immediately accessible to and/or presently operated on by processing unit  720 . By way of non-limiting example, memory  730  can also include an operating system, application programs, other program modules, and program data. 
     The computer  710  can also include other removable/non-removable, volatile/nonvolatile computer storage media. For example, computer  710  can include a hard disk drive that reads from or writes to non-removable, nonvolatile magnetic media, a magnetic disk drive that reads from or writes to a removable, nonvolatile magnetic disk, and/or an optical disk drive that reads from or writes to a removable, nonvolatile optical disk, such as a CD-ROM or other optical media. Other removable/non-removable, volatile/nonvolatile computer storage media usable in the exemplary operating environment include, but are not limited to, magnetic tape cassettes, flash memory cards, digital versatile disks, digital video tape, solid state RAM, solid state ROM and the like. In a non-limiting example, the computer  710  can include a hard disk drive connected to the system bus  721  through a non-removable memory interface. In another non-limiting example, the computer  710  can include a magnetic disk drive or optical disk drive connected to the system bus  721  by a removable memory interface. 
     A user can enter commands and information into the computer  710  through input devices such as a keyboard or a pointing device such as a mouse, trackball, touch pad, and/or other pointing device. Other input devices can include a microphone, joystick, game pad, satellite dish, scanner, or the like. These and/or other input devices can be connected to the processing unit  720  through user input  740  and associated interface(s) that are coupled to the system bus  721 , but can be connected by other interface and bus structures, such as a parallel port, game port or a universal serial bus (USB). A graphics subsystem can also be connected to the system bus  721 . In addition, a monitor or other type of display device can be connected to the system bus  721  via an interface, such as output interface  750 , which can in turn communicate with video memory. In addition to a monitor, computers can also include other peripheral output devices, such as speakers and/or a printer, which can also be connected through output interface  750 . 
     The computer  710  can operate in a networked or distributed environment using logical connections to one or more other remote computers, such as remote server  770 , which can in turn have media capabilities different from device  710 . The remote server  770  can be a personal computer, a server, a router, a network PC, a peer device or other common network node, and/or any other remote media consumption or transmission device, and can include any or all of the elements described above relative to the computer  710 . The logical connections depicted in  FIG. 7  include a network  771 , such local area network (LAN) or a wide area network (WAN), but can also include other networks/buses. Such networking environments are commonplace in homes, offices, enterprise-wide computer networks, intranets and the Internet. 
     The computer  710  includes a receiver/transmitter  780  for activating the RFID tag and receiving the information transmitted by the RFID tag after transmitter energizes the RFID tag. The receiver/transmitter  780  can contain a plurality of antennas suitable for different frequencies of operation or different ranges, and/or polarizations to communicate with the RFID tag. 
     When used in a LAN networking environment, the computer  710  connects to the LAN  771  through a network interface or adapter. When used in a WAN networking environment, the computer  710  can include a communications component, such as a modem, or other means for establishing communications over the WAN, such as the Internet. A communications component, such as a modem, which can be internal or external, connects to the system bus  721  via the user input interface at input  740  and/or other appropriate mechanism. In a networked environment, program modules depicted relative to the computer  710 , or portions thereof, can be stored in a remote memory storage device. It should be appreciated that the network connections shown and described are exemplary and other means of establishing a communications link between the computers can be used. 
     The word “exemplary” is used herein to mean serving as an example, instance, or illustration. For the avoidance of doubt, the subject matter disclosed herein is not limited by such examples. In addition, any aspect or design described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects or designs, nor is it meant to preclude equivalent exemplary structures and techniques known to those of ordinary skill in the art. Furthermore, to the extent that the terms “includes,” “has,” “contains,” and other similar words are used in either the detailed description or the claims, for the avoidance of doubt, such terms are intended to be inclusive in a manner similar to the term “comprising” as an open transition word without precluding any additional or other elements. 
     The aforementioned systems have been described with respect to interaction between several components. It can be appreciated that such systems and components can include those components or specified sub-components, some of the specified components or sub-components, and/or additional components, and according to various permutations and combinations of the foregoing. Sub-components can also be implemented as components communicatively coupled to other components rather than included within parent components (hierarchical). Additionally, it should be noted that one or more components can be combined into a single component providing aggregate functionality or divided into several separate sub-components, and that any one or more middle layers, such as a management layer, can be provided to communicatively couple to such sub-components in order to provide integrated functionality. Any components described herein may also interact with one or more other components not specifically described herein but generally known by those of skill in the art. 
     In view of the exemplary systems described supra, methodologies that can be implemented in accordance with the described subject matter will be better appreciated with reference to the flowcharts of the various figures. While for purposes of simplicity of explanation, the methodologies are shown and described as a series of blocks, it is to be understood and appreciated that the claimed subject matter is not limited by the order of the blocks, as some blocks may occur in different orders and/or concurrently with other blocks from what is depicted and described herein. Where non-sequential, or branched, flow is illustrated via flowchart, it can be appreciated that various other branches, flow paths, and orders of the blocks, can be implemented which achieve the same or a similar result. Moreover, not all illustrated blocks are required to implement the methodologies described hereinafter. In addition to the various embodiments described herein, it is to be understood that other similar embodiments can be used or modifications and additions can be made to the described embodiment(s) for performing the same or equivalent function of the corresponding embodiment(s) without deviating therefrom. Still further, multiple processing chips or multiple devices can share the performance of one or more functions described herein, and similarly, storage can be effected across a plurality of devices. Accordingly, no single embodiment shall be considered limiting, but rather the various embodiments and their equivalents should be construed consistently with the breadth, spirit and scope in accordance with the appended claims.