Simple link protocol providing low overhead coding for LAN serial and WDM solutions
First Claim
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1. A method for frame delineation in a data communication system, comprising:
- transmitting a plurality of data frames temporally separated by respective inter-packet gaps (IPGs), each IPG having positioned within it at least a synchronization pattern suitable for delineating a respective data frame and identifying a transition point between said respective data frame and a subsequent control portion.
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Abstract
A data structure, method and protocol wherein synchronization data indicative of a data frame delineation point is inserted within an inter-packet gap (IPG) proximate a data frame during transmission. Optionally, a cyclical redundancy check (CRC) length indicative data, pointer data, and other data is inserted within the IPG to further insure appropriate delineation of data frames within a data stream.
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Citations
29 Claims
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1. A method for frame delineation in a data communication system, comprising:
transmitting a plurality of data frames temporally separated by respective inter-packet gaps (IPGs), each IPG having positioned within it at least a synchronization pattern suitable for delineating a respective data frame and identifying a transition point between said respective data frame and a subsequent control portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for delineating data frames within a communications link, comprising:
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receiving a data stream to be transmitted as a sequence of data frames; and inserting, into a temporal region following each transmitted data frame, a synchronization pattern suitable for delineating said data frame and identifying a transition point between said respective data frame and a subsequent control portion. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for transmitting data, comprising:
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transmitting, to a physical media dependent (PMD) layer, a sequence of idle control characters; transmitting, to said PMD layer, a start of frame delineator (SFD) upon detecting the presence of data to be transmitted; transmitting said received data until an entire data frame has been transmitting; and transmitting, upon the transmission of said entire data frame, an end of frame delineator (EFD) and a termination flag (T-FLAG), said T-FLAG comprising a respective relatively long synchronization pattern suitable for delineating said data frame and identifying a transition point between said respective data frame and a subsequent control portion. - View Dependent Claims (19, 20, 21, 22)
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23. A method for receiving data, comprising:
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determining data frame delineation points within a received data stream by detecting the presence of a synchronization pattern within said data stream, said synchronization pattern being positioned within inter-packet gaps (IPGs) and identifying a transition point between a respective data frame and a subsequent control portion; and forming data frames for subsequent processing by utilizing said determined delineation points. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification