Multiplex communications – Channel assignment techniques – Carrier sense multiple access
Reexamination Certificate
2007-04-17
2007-04-17
Rao, Seema S. (Department: 2616)
Multiplex communications
Channel assignment techniques
Carrier sense multiple access
C370S445000, C370S447000, C370S458000, C370S459000
Reexamination Certificate
active
10738056
ABSTRACT:
A system and method of providing distributed video and/or audio communication over a network, such as a power-line communications (PLC) network. By way of example, the network is divided into periodic cycles wherein each cycle comprises a number of time slots. The timing of the cycles is determined by a cycle master that assumes the position when it desires to send a transmission and is unable to detect valid cycles on the network. A portion of each cycle is reserved for the transmission of asynchronous data, the remainder being utilized for isochronous streams. Before transmitting a new stream a transmitter wins one or more open slots by arbitration, wherein the winner is selected based on the priority of the stream to be sent. Transmitters may obtain extra slots to improve quality, integrity, or security of the stream. The mechanisms of the invention are compatible with legacy CDMA devices.
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Mais Mark A.
O'Banion John P.
Rao Seema S.
Sony Electronics Inc.
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