EPC Tag Data Standard Version 1.1 Contd…

Lets now talk about encoding… For more details on this topic you will have to read the actual standards document I will just try to summarize the information here…

EPC encoding for tag is set of bits with variable header followed by various fields. Header can be 2 bits or 8 bits. Following are details on Header field
64 Bit
01 – reserved scheme
10 – SGTIN 64
1100 1110 – DOD 64
0000 1000 – SSCC 64
0000 1001 – GLN 64
0000 1010 – GRAI 64
0000 1011 – GIAI 64

96 Bits
0010 1111 – DOD 96
0011 0000 – SGTIN 96
0011 0001 – SSCC 96
0011 0010 – GLN 96
0011 0011 – GRAI 96
0011 0100 – GIAI 96
0011 0101 – GID 96

Following are the breakups of various encodings…
GID 96 Details
Header : 8
General Manager number(G): 28 bits
Object class(C): 24 bits
Serial Number(S): 36 bits
Encoding: Concatenate 0011 0101, G, C, S from most significant to least significant
Decoding: First 8 bits are 0011 0101, next G,C,S based on the table above.

Similarly we can perform encoding and decoding for every identity type.. For more details please read EPC Tag data standard version 1.1 document…

Next we will talk about URI representation for each identity type…

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