Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2005-01-28
2009-06-23
Chan, Wing F (Department: 2419)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S353000, C370S389000, C370S392000, C725S105000
Reexamination Certificate
active
07551606
ABSTRACT:
A method and apparatus for communicating streaming data, such as audio and video streams, isochronously over a network. The invention may be utilized with power-line communication (PLC) networks or other IP-based networks. Hardware is configured for packetizing the streaming data, such as MPEG streaming data, which is communicated at the IP physical layer within a contention-free period within each communication cycle. A reservation mechanism utilizes back-offs to allow a single transmitter to reserve a slot for isochronous communication of a given stream of data. A processing element handles packetizing only for asynchronous communication of data within the remaining portion of each communication cycle which is referred to as a contention period, as a number of transmitters may vie for communication during that interval. Addressing for the isochronous communication is performed with MAC addressing instead of IP addressing. Existing IP stack and protocols can be reused for upper layer control mechanisms.
REFERENCES:
patent: 6378000 (2002-04-01), Akatsu et al.
patent: 6496509 (2002-12-01), Fant
patent: 6587453 (2003-07-01), Romans et al.
patent: 6760797 (2004-07-01), Kim
patent: 6791996 (2004-09-01), Watanabe et al.
patent: 6813282 (2004-11-01), Domon
patent: 6820150 (2004-11-01), Joy et al.
patent: 2002/0120740 (2002-08-01), Ho et al.
patent: 2004/0101288 (2004-05-01), Ohnishi
patent: 2004/0151153 (2004-08-01), Henry et al.
patent: 2004/0153565 (2004-08-01), Bloch et al.
patent: 2004/0170182 (2004-09-01), Higashida et al.
patent: 2004/0223487 (2004-11-01), Ejzak et al.
patent: 2005/0002373 (2005-01-01), Watanabe et al.
patent: 2005/0177860 (2005-08-01), Goyal et al.
patent: 2006/0112272 (2006-05-01), Morioka et al.
patent: 2001160813 (2001-06-01), None
Lee et al., “HomePlug 1.0 Powerline Communication LANs—Protocol Description and Performance Results version 5.4”, International Journal of Communication Systems, Sep. 2002, pp. 1-21.
International Electrotechnical Commission, “Consumer audio/video equipment-Digital interface- Part 4: MPEG2-TS data transmission”, IEC First edition, Feb. 1998, Reference No. 61883-4, pp. 5-23.
IEEE std 802.3-1985, “IEEE standards for local area networks: carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications”, 1985, pp. 23-27.
Campbell Matthew
Chan Wing F
O'Banion John P.
Sony Corporation
Sony Electronics Inc.
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