8.123 Remote User ID
29.2743GPP3GPP Evolved Packet System (EPS)Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C)Release 18Stage 3TS
Remote User ID is transferred via GTP tunnels and is coded as depicted in Figure 8.123-1. The Remote User ID IE shall contain one IMSI identity and, if available, one IMEI identity and/or one MSISDN identity. The flag MSISDNF in octet 5 indicates if the MSISDN shall be present in the respective field. The flag IMEIF in octet 5 indicates if the IMEI shall be present in the respective field. The IMSI field including the Length of IMSI shall be always present.
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Bits |
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Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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1 |
Type = 192 (decimal) |
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2 to 3 |
Length = n |
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4 |
Spare |
Instance |
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5 6 7 to a b b+1 to c d d+1 to e (e+1) to (n+4) |
Spare |
IMEIF |
MSISDNF |
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Length of IMSI |
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IMSI |
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Length of MSISDN |
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MSISDN |
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Length of IMEI |
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IMEI |
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These octet(s) is/are present only if explicitly specified |
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Figure 8.123-1: Remote User ID
The coding of IMSI field, from octets 7 to ‘a’ shall be encoded as the octets 5 to n+4 of the IMSI IE type specified in clause 8.3.
The coding of MSISDN field, octets ‘b+1’ to ‘c’ shall be encoded as the octets 5 to n+4 of the MSISDN IE type specified in clause 8.11.
The coding of IMEI field, octets ‘d+1’ to ‘e’ shall be encoded as the octets 5 to n+4 of the MEI IE type specified in clause 8.10.