8.91 Additional flags for SRVCC
29.2743GPP3GPP Evolved Packet System (EPS)Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C)Release 18Stage 3TS
Additional flags for SRVCC is coded as depicted in Figure 8.91-1.
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Bits |
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Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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1 |
Type = 160 (decimal) |
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2 to 3 |
Length = n |
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4 |
Spare |
Instance |
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5 |
Spare |
VF |
ICS |
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|
6-(n+4) |
These octet(s) is/are present only if explicitly specified |
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Figure 8.91-1: Additional flags for SRVCC
The following bits within Octet 5 indicate:
– Bit 1 – ICS (IMS Centralized Service): This flag indicates that UE supports ICS specific service as specified in 3GPP TS 23.292 [47].
– Bit 2 – VF (vSRVCC Flag): This flag indicates that the user is subscribed to the vSRVCC.