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US Patent 6690289 - Message formatting, authentication, and error detection in home control systems
US Patent Issued on February 10, 2004
Estimated Patent Expiration Date:
June 12, 2017Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
June 12, 2017Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA system for communicating over electrical wiring in a house or other building is presented. Components are grouped and each group is assigned a group identifier code. Components communicates only with components of the same group, using the group identifier code. Each message includes the group identifier code, message data, and a message authentication code (MAC) that is calculated for each message. A receiving component disregards any message whose group identifier code is not the same as that of the receiving component. MACs are calculated using a shared key value and a one-way hash function. The shared key value, in turn, is taken from an ordered sequence of key values that is defined for each component group based on a counter value. To change to a new key value, one component of the group simply starts using the new key value. When a receiving component receives a message that does not. | InventorsAssigneeApplicationNo. 08/874046 filed on 06/12/1997US Classes:340/825.52, Addressing375/316RECEIVERSField of Search340/825.52, Addressing340/825.22Program controlExaminersPrimary: Zimmerman, BrianAttorney, Agent or FirmUS Patent References4418333, Appliance control systemIssued on: 11/29/1983 Inventor: Schwarzbach , et al.4703306, Appliance system Issued on: 10/27/1987 Inventor: Barritt4755792, Security control system Issued on: 07/05/1988 Inventor: Pezzolo , et al.5051720, Remote control system using power line of remote site Issued on: 09/24/1991 Inventor: Kittirutsunetorn5227762, Power line carrier controlled lighting system Issued on: 07/13/1993 Inventor: Guidette, et al.5352957, Appliance control system with programmable receivers Issued on: 10/04/1994 Inventor: Werner5471190, Method and apparatus for resource allocation in a communication network system Issued on: 11/28/1995 Inventor: Zimmermann5570085, Programmable distributed appliance control system Issued on: 10/29/1996 Inventor: Bertsch5661804Trainable transceiver capable of learning variable codes Issued on: 08/26/1997 Inventor: Dykema, et al. International ClassH04Q 1/00 (20060101) |
