F.1 3G Cell Identity coding – 28 bitstring
3GPP44.318Generic Access Network (GAN)Mobile GAN interface layer 3 specificationRelease 17TS
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8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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3G Cell Identity |
octet n |
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3G Cell Identity cont. |
octet n+1 |
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3G Cell Identity cont. |
octet n+2 |
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3G Cell Identity cont. |
Spare |
octet n+3 |
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Figure F1.1.1: 3G Cell Identity information element
The 3G Cell Identity is defined in 3GPP TS 25.331 and further clarified in 3GPP TS 25.401 as a 28 bit variable, which in the Up protocol has to be included in 4 octets. Consequently 4 spare bits have to be placed within these 4 octets. Bit 8 in octet n is the most significant bit and bit 5 in octet n+3 is the least significant bit.