Method and device for information block coding and synchronization detecting
First Claim
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1. A method for check information block coding in 10 gigabit per second Ethernet passive optical network (EPON), comprising:
- adding a synchronization header to each of a plurality of data information blocks, wherein the synchronization header comprises a bit indicating an information type of the corresponding data information block;
performing a forward error correction (FEC) coding on a predetermined number of the data information blocks and the bits in the synchronization headers associated with the data information blocks to generate M continuous check information blocks following the predetermined number of the data information blocks;
adding a synchronization character to each of the M continuous check information blocks according to a synchronization character sequence {Tj}, wherein one check information block with one synchronization character comprises 66 bits, wherein the synchronization character is used for synchronization of the check information blocks and the synchronization character is “
00”
or “
11”
, wherein the synchronization character added to a jth check information block Pj is Tj, and the synchronization character sequence {Tj} satisfies the following conditions;
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Abstract
A method and a device for information block coding and synchronization detecting are provided. Information block coding and synchronization detecting are preformed according to a synchronization character sequence satisfying certain conditions. Thus, the probability of incorrect synchronization is effectively reduced without increasing the complexity. Optimal synchronization character sequences in different lengths are provided to further reduce the probability of incorrect synchronization.
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Citations
8 Claims
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1. A method for check information block coding in 10 gigabit per second Ethernet passive optical network (EPON), comprising:
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adding a synchronization header to each of a plurality of data information blocks, wherein the synchronization header comprises a bit indicating an information type of the corresponding data information block; performing a forward error correction (FEC) coding on a predetermined number of the data information blocks and the bits in the synchronization headers associated with the data information blocks to generate M continuous check information blocks following the predetermined number of the data information blocks; adding a synchronization character to each of the M continuous check information blocks according to a synchronization character sequence {Tj}, wherein one check information block with one synchronization character comprises 66 bits, wherein the synchronization character is used for synchronization of the check information blocks and the synchronization character is “
00”
or “
11”
, wherein the synchronization character added to a jth check information block Pj is Tj, and the synchronization character sequence {Tj} satisfies the following conditions; - View Dependent Claims (2, 3, 4)
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5. A device for coding check information blocks of forward error correction (FEC) code words in a 10 gigabit per second Ethernet passive optical network (EPON), comprising:
a sequence storage module, adapted to store a synchronization character sequence {Tj}, wherein the {Tj} satisfy the following conditions; - View Dependent Claims (6, 7, 8)
Specification