8.8 EPS Bearer ID (EBI)
29.2743GPP3GPP Evolved Packet System (EPS)Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C)Release 18Stage 3TS
EPS Bearer ID (EBI) is coded as depicted in Figure 8.8-1.
The overall length of the IE is 5 octets. In future releases of the spec additional octets may be specified and new semantic for the spare bits may be defined.
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Bits |
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|
Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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|
1 |
Type = 73 (decimal) |
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|
2 to 3 |
Length = n |
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|
4 |
Spare |
Instance |
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|
5 |
Spare (all bits set to 0) |
EPS Bearer ID (EBI) |
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|
6 to (n+4) |
These octet(s) is/are present only if explicitly specified |
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Figure 8.8-1: EPS Bearer ID (EBI)
The following bits within Octet 5 shall indicate:
– Bit 8 to 5 – Spare, for future use and set to zero.
– Bit 4 to 1 – EPS Bearer ID (EBI) field, the coding of EBI field and its value range is specified in 3GPP TS 24.007 [30], clause 11.2.3.1.5, bits 5 to 8. The sending GTPv2 entity shall include a EBI with a value between ‘1’ and ‘4’ only when the target GTPv2 entity is known to support 15 EPS Bearers, based on per PLMN local configuration.