Sharp Laboratories of America, Inc

Richard Thomas Bennett

John Michael Kowalski

Shugong Xu

Srinivas Kandala

Daryl James Hlasny

A system and method allows a user to automatically configure a new device on a local area network (LAN) by pressing a sequence of buttons on a conventional remote control (RC) while pointing the infrared (IR) transmitter of the RC at the new device. The button-sequence includes an arbitrary button-sequence selected by the user, or a pre-established button-sequence stored in an existing network member device, such as the network controller, and displayed to the user. The button-sequence represents a cipher key for an encryption/decryption algorithm. The network member device uses the cipher key to encrypt a configuration message that includes a shared network security key and transmit it over the network. The encrypted configuration message is received by the new device and decrypted using the same cipher key. The decrypted network configuration parameters, including the shared network security key, enable the new device to automatically associate with the network and communicate in a secure manner using the shared network security key.

System and method for automatic setup of a network device with secure network transmission of setup parameters using a standard remote control

A system and method for use with local area networks (LANs) automatically configures a new device on a LAN by secure encrypted transmission of setup parameters. A remote control (RC) with an infrared (IR) transmitter contains a stored setup command and a security number that is used only once (a 'nonce'). Setup of a new device is initiated by pressing a 'setup' button on the RC which generates the security number and transmits it and the setup command to the new device via IR. The new device receives the setup command and security number and queries the network for the setup parameters. The RC also transmits the security number via IR to a network member device that contains the setup parameters. The network member uses the security number as an encryption key to encrypt the setup parameters and transmit them over the network. The new device uses the security number as the decryption key to decrypt the transmitted setup parameters.

System and method for automatic setup of a network device with secure network transmission of setup parameters

Systems and methods for implementing an acknowledgement mechanism for transmission of a real-time data stream from a sending system to a receiving system are disclosed. An exemplary method implemented in a sending system involves establishing a connection with a receiving system for transmitting a real-time data stream to the receiving system. The method also involves transmitting a current segment of the real-time data stream to the receiving system. If an acknowledgement of the current segment is not received from the receiving system during a predetermined time period, the method also involves discontinuing any retransmission attempts for the current segment and transmitting a next segment to the receiving system.

Systems and methods for implementing an acknowledgement mechanism for transmission of a real-time data stream

A method of synchronizing clocks in the stations of ad hoc and infrastructure networks includes providing a time stamp field in a header; reading the header by all stations in a network; extracting the time stamp information from the header by each station in the network as time information; sending extracted time information to a station clock; and adjusting the station clock as a function of the extracted time information. A system for synchronizing clocks in the stations of ad hoc and infrastructure networks includes a DLL having a comparator for receiving the time stamp information and a low-pass filter having a long time-constant for adjusting the station clock in a gradual manner; a time stamp field in a header; and time information extracted from the time stamp information of the header by each station in the network.

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Vancouver, WA, United States of America

Richard Thomas Bennett