Mindspeed Technologies, Inc.

Conexant Systems, Inc.

Impinj, Inc.

Silicon Laboratories Inc.

Joel D Peshkin

Christopher J Diorio

James W Johnston

Ismail I Eldumiati

Gilles G Fayad

P Michael Henderson

Paul C Wren

Abdelnaser M Adas

John S Walley

Steven A Gronemeyer

Kenneth David Ko

Jamal Haque

Raphael Rahamim

Edward S Zuranski

Ganning Yang

Yongbing Wan

Kenneth Scott Walley

Shahram Famorzadeh

Shrenik P Patravali

Anthony A Tzouris

Frederic M Stubbe

David O Anderton

Don L Harmer

Scott A Cooper

Charles F Raasch

Ali Aiouaz

Jason Brent

Jim W Johnston

Dean Grumlose

Philippe Richard

Andy Webster

Karim Younes

Sverrir Olafsson

Warner B Andrews, Jr

Mickey C Rushing

Warner Andrews

Mounir Ayoub

Diep H Le

Hiep Nguyen

Simon Zhu

Richard Burns

Glendon C King

Paul Wren

Michael Whitfield

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.

RFID tags with public and private inventory states

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.

Disclosed are various systems and methods for controlling a voice activity detector. In one example approach, a method is provided in which a voice over Internet protocol (VOIP) session is initiated in a first gateway with a second gateway. A plurality of jitter adaptation packets are transmitted from the first gateway to the second gateway. Also, the voice activity detector is disabled in the first gateway during the transmission of the jitter adaptation packets. The voice activity detector is enabled in the first gateway after the transmission of the jitter adaptation packets.

Delayed onset of voice activity detection for jitter adaptation

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.

RFID reader controllers limiting theft of confidential information

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.

RFID readers limiting theft of confidential information

An improved data communication technique may be employed with modems through a packet network. The disclosed technique facilitates a virtual end-to-end connection between two modems such that the two modems can effectively behave as if directly connected to each other, unaware of any modifications to the data being transferred or to the protocols configured within the communication connection. Preferably, a data communication system for carrying out the communication technique demodulates data coming from a first modem, transports the demodulated data in packets between two gateways, and then remodulates the data before delivering to a second modem at the other end. In accordance with various aspects of the present invention, various alternatives for calling and quality of service set-up mechanisms, the establishment of a communication session, the transport of data during a communication session, the flow control between all system components involved, and the mechanisms for the termination of communications are also provided.

Methods and apparatus for data communications through packet networks

Disclosed are various systems and methods for controlling a voice activity detector. In one example approach, a method is provided in which a voice over internet protocol (VOIP) session is initiated in a first gateway with a second gateway. A plurality of jitter adaptation packets are transmitted from the first gateway to the second gateway. Also, the voice activity detector is disabled in the first gateway during the transmission of the jitter adaptation packets. The voice activity detector is enabled in the first gateway after the transmission of the jitter adaptation packets.

A digital subscriber line (DSL) communication system that utilizes the high frequency band of a standard telephone line does not require the use of a plain old telephone service (POTS) splitter in the resident's home, which provided isolation between the POTS frequency band (0 to 4 kHz) and the DSL frequency band. A digital subscriber line modem utilizes either constant envelope modulation or quadrature amplitude modulation for outputting DSL signals upstream to a central office. When a telephone in the resident's home is detected as being off-hook, then the constant envelope modulation is used by the DSL modem in order to lessen the intermodulation product distortion that results in audible noise heard by a user of the telephone. When the telephone is on-hook, then another type of modulation, such as QAM, is used to maximize the upstream data rate capability in the DSL frequency band, since any noise generated by the QAM is not a problem due to the non-use of the POTS frequency band.

Modulation switching for DSL signal transmission

A communication system for a computer includes apparatuses and methods for providing commands and data between a host computer and a multi-channel modem via a single host-to-modem physical channel using multiple logical channels. The communication system suitably includes a logical channel upon which each modem receives command data. Signals asserted on the logical channel corresponding to commands for a particular physical channel are automatically treated as commands. Signals on noncommand logical channels are processed as data to be transferred. Consequently, each physical channel of the modem may be controlled without requiring an escape sequence.

Methods and apparatus for communicating commands and data using logical channels

A intelligent network interface network port (INIP) is provided that enables a visiting computer to be connected to a local area network (LAN), even though the LAN is not configured to support the visiting computer. Upon detecting one of several specific types of messages, the INIP modifies the message, retransmits the modified message and notifies the visiting computer that the INIP is the appropriate target for the message, thus acting as a relay point between the visiting computer and other devices both on the LAN and accessible through it. This enables the visiting computer to transparently connect to a LAN that is not configured to support it.

Intelligent network interface port for visiting computers

A system and method for performing power management in a communication system without losing data is disclosed. The G.Lite system is an exemplary system suitable for implementing the present invention because it includes at least one operational state and an idle state in which no data is transmitted. The G.Lite standard defines ATU states. The defined states are full on state L0, low power state L1 and idle state L3. In L0 state, the ADSL link is fully operational at full data rate. In L1 state, the ADSL link is fully operational at a lower data rate. In L3 state, no signal is transmitted. Because no signal is transmitted, no idle cells are transmitted. This will result in losing the cell delineation and ATM link connectivity. Therefore, when data is received for an ATU in L3 state, data cells may be lost. The present invention solves the problem of lost data cells by allowing interaction between the control path and the data path by requesting that the micro-controller be interrupted when a data cell arrives for an ATU-C that is in L3 state. When a data cell arrives for an ATU-C in L3 state, the micro-controller is interrupted. The micro-controller then ensures that a sufficient number of idle cells are sent to the ATU-C prior to any data cells being sent to the ATU-C.

System and method for performing power management without losing data, connectivity or reachability

Growing community of inventors

Irvine, CA, United States of America

Joel D Peshkin