Method and apparatus for data frame synchronization

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels

Reexamination Certificate

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C375S368000, C398S154000

Reexamination Certificate

active

07983308

ABSTRACT:
A circuit to synchronize with a data transmission includes a comparator to read a set of data within a serialized data transmission, compare the set of data to a predetermined data pattern and output a comparison result. For a serialized data transmission, the comparator receives the serialized transmission and a shift register serially coupled to the comparator to hold the data pattern. A synchronization detector receives a comparison hit vector based on the comparison result from the comparator and aligns a boundary of a data frame according to the comparison hit vector if the comparison hit vector indicates a match between the data pattern in the set of data and the predetermined data pattern. For a deserialized data transmission, each stage of a multistage shift register read a set of data from the deserialized data transmission and selectively outputs the set of data to a comparator which compares each set to a predetermined data pattern and output a comparison result. A synchronization detector receives the comparison result from the comparator and aligns a boundary of a data frame according to the comparison result if the comparison result indicates a match between a data pattern sub-set within a combined data pattern and the predetermined data pattern, where the sets of deserialized data comprise the combined data pattern.

REFERENCES:
patent: 4208650 (1980-06-01), Horn
patent: 6999543 (2006-02-01), Trinh et al.
patent: 2001/0008550 (2001-07-01), Takahashi
ITU-T Telecommunication Standardization Sector of ITU-G.984.4—Series G: Transmission Systems and Media, Digital Systems and Networks, Digital sections and digital line system—Optical line systems for local and access networks—Gigabit-capable Passive Optical Networks (G-PON): ONT management and control interface specification (2004).
ITU-T Telecommunication Standardization Sector of ITU-G.984.4 Amendment 1, Series G: Transmission Systems and Media, Digital Systems and Networks, Didgital sections and digital line system—Optical line systems for local and access networks—Gigabit-capable Passive Optical Networks (G-PON): ONT management and control interface specification (2005).
ITU-T Telecommunication Standardization Sector of ITU-G.984.4 Amendment 2—Series G: Transmission Systems and Media, Digital Systems and Networks, Digital sections and digital line system—Optical line systems for local and access networks—Gigabit-capable Passive Optical Networks (G-PON): ONT management and control interface specification (2006).
ITU-T Telecommunication Standardization Sector of ITU G.984.3—Series G: Transmission Systems and Media, Digital Systems and Networks, Digital sections and digital line system—Optical line systems for local and access networks—Gigabit-capable Passive Optical Networks (G-PON): Transmission convergence layer specification (2004).
ITU-T Telecommunication Standardization Sector of ITU G.984.4, Series G: Transmission Systems and Media, Digital Systems and Networks, Digital sections and digital line system—Optical line systems for local and access networks, Gigabit-capable Passive Optical Networks (G-PON): ONT management and control interface specification (2004).
ITU-T Telecommunication Standardization Sector of ITU G.984.4 Amendment 1, Series G: Transmission Systems and Media, Digital Systems and Networks—Digital sections and digital line system—Optical line systems for local and access networks, Gigabit-capable Passive Optical Networks (G-PON): ONT management and control interface specification (2005).
ITU-T Telecommunication Standardization Sector of ITU G.984.4 Amendment 2, Series G: Transmission Systems and Media, Digital Systems and Networks—Digital sections and digital line system—Optical line systems for local and access networks, Gigabit-capable Passive Optical Networks (G-PON): ONT management and control interface specification (2006).

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