Packet-based optical communications networks

Details Packet-based optical communications networks Packet-based optical communications networks

2005-05-17

2005-05-17

Chin, Wellington (Department: 2664)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S474000, C398S051000

Reexamination Certificate

active

06895023

ABSTRACT:
A structure for an optical packet for transmission over an optical network comprises a packet header (30) and a packet payload (32). The header comprises first and second sections (34, 36). The first section (34) comprises a series of clock pulses (40) at the data rate of the second section of the packet header, or a multiple or sub-multiple thereof. This header structure enables the clock pulses in the first section (34) to be used to control the timing instants when the header information in the second section (36) is read. The header information can thus be read using the data in the header alone, without needing to alter the structure of the packet payload. The clock pulses can be delayed in order to enable them to be used to control the reading of data in the second section of the packet header. The invention ca be used in optical communications networks.

REFERENCES:
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patent: 5708475 (1998-01-01), Hayashi et al.
patent: 5831752 (1998-11-01), Cotter et al.
patent: 5841560 (1998-11-01), Prucnal
patent: 6694098 (2004-02-01), Warbrick et al.
A. Bononi, F. Forghieri, P.R. Prucnal, “Self-Clocking Scheme For Bit Synchronisation In Ultrafast Packet Switching Transparen Opitcal Networks”, May 13th 1993, Electonics Letters, vol. 29, No. 10, pp. 872-873.*
“Self-Clocking Scheme for Bit Synchronisation inUltrafast Packet Switching Tansparent Optical Networks,” by A. Bononi, F. Forghieri and P.R. Prucnal, Electronics Letters, vol. 29, No. 10, May 13, 1993.

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