Abstract: RFID tags capable of transitioning between a private state and one or more public states are provided. In the private state, tags may participate in an inventory round without restriction. In a public state, tags may be prevented from participating in an inventory round, allowed to participate without providing actual identifying information, or allowed to participate providing an alternate identifier. Whether and how the tag responds in a public state may depend on certain conditions including if one or more of the tag's flags are asserted or deasserted. A reader may select a public tag for inventorying by verifying itself, and the tag then asserting or deasserting one or more of its flags accordingly. The asserted or deasserted flag(s) may be used to determine whether and how a tag in a public state participates in an inventory round.

Abstract: RFID tags capable of transitioning between a private state and one or more public states are provided. In the private state, tags may participate in an inventory round without restriction. In a public state, tags may be prevented from participating in an inventory round, allowed to participate without providing actual identifying information, or allowed to participate providing an alternate identifier. Whether and how the tag responds in a public state may depend on certain conditions including if one or more of the tag's flags are asserted or deasserted. A reader may select a public tag for inventorying by verifying itself, and the tag then asserting or deasserting one or more of its flags accordingly. The asserted or deasserted flag(s) may be used to determine whether and how a tag in a public state participates in an inventory round.

Abstract: RFID tags capable of transitioning between a private state and one or more public states are provided. In the private state, tags may participate in an inventory round without restriction. In a public state, tags may be prevented from participating in an inventory round, allowed to participate without providing actual identifying information, or allowed to participate providing an alternate identifier. Whether and how the tag responds in a public state may depend on certain conditions including if one or more of the tag's flags are asserted or deasserted. A reader may select a public tag for inventorying by verifying itself, and the tag then asserting or deasserting one or more of its flags accordingly. The asserted or deasserted flag(s) may be used to determine whether and how a tag in a public state participates in an inventory round.

Abstract: RFID tags capable of transitioning between a private state and one or more public states are provided. In the private state, tags may participate in an inventory round without restriction. In a public state, tags may be prevented from participating in an inventory round, allowed to participate without providing actual identifying information, or allowed to participate providing an alternate identifier. Whether and how the tag responds in public state may depend on certain conditions including if one or more of the tag's flags are asserted or deasserted. Readers may select a public tag for inventorying by providing sufficient information to the tag to verify the reader's authenticity, and the tag then asserting or deasserting one or more of its flags accordingly. The asserted or deasserted flag(s) may be used to determine whether and how a tag in public state participates in an inventory round.

Abstract: An RFID reader controller and methods of controlling an RFID reader by an RFID reader controller are provided to limit or prevent the issuing of confidential information such as encryption keys, passwords, shared secrets, and the like to RFID tags if a reader is not authorized. A controller may determine the authorization status of a reader and limit its communication with the reader or instruct the reader to limit an operational aspect of the reader.

Abstract: RFID reader and methods of operating an RFID reader are provided to limit or prevent the issuing of confidential information such as encryption keys, passwords, shared secrets, and the like to RFID tags if a reader is not authorized. The reader may determine its authorization status based on a self-check, information from another reader, or information from a controller, and limit an operational aspect of itself or for communication with the tags.

Abstract: The present invention is directed to a method and system for operating a secondary diagnostic channel on a modem. The present invention is directed to the transmission of data on a previously defined UI frame. In this manner, various pieces of information may be sent over the secondary logic channel. The present application also discloses the use of a wild card request that allows the sending of multiple pieces of unrelated data at one time, through the use of a special format. The present application also discloses the use pseudo-unique call identification information that can be used to diagnose and prevent problems in various data connections. Modems can be configured to refer to information stored for previous connections to diagnose problems that may have occurred in the previous connection.

Abstract: In a modem system connecting two modems over the telephone lines, a method is disclosed that transmits identification data regarding the two modems. Furthermore, the connection between the two modems may be optimized based upon information regarding the compatibility of the two modems. In addition, a secondary logic channel, which may remain open throughout the duration of the connection may also be used to transmit data about the modems. The secondary logic channel would only transmit data if the primary data channel is not being fully used. The secondary logic channel may be used to transmit various diagnostic information between the modems.

Abstract: A signaling technique for use with an asynchronous transfer mode (ATM) over asymmetric digital subscriber line (ADSL) system is disclosed. The ATM over ADSL system employs an ATM multiplexer (MUX) operatively connected to a number of downstream ATM devices and operatively connected to an upstream ATM switch. The MUX is configured to receive and process upstream setup messages that originate from the downstream ATM devices. In response to an upstream message cell, the MUX compares the call reference number (CRN) contained in the setup message with a table of CRN values associated with other calls. If necessary, the MUX assigns a new CRN value to the current setup message such that the current connection with the originating downstream device is uniquely identified by the assigned CRN. The MUX uses a CRN mapping table to facilitate the unambiguous downstream routing of subsequent signaling cells.

Abstract: The present invention is directed to a method and system for operating a secondary diagnostic channel on a modem. The present invention is directed to the transmission of data on a previously defined UI frame. In this manner, various pieces of information may be sent over the secondary logic channel. The present application also discloses the use of a wild card request that allows the sending of multiple pieces of unrelated data at one time, through the use of a special format. The present application also discloses the use pseudo-unique call identification information that can be used to diagnose and prevent problems in various data connections. Modems can be configured to refer to information stored for previous connections to diagnose problems that may have occurred in the previous connection.