8.95 Absolute Time of MBMS Data Transfer
29.2743GPP3GPP Evolved Packet System (EPS)Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C)Release 18Stage 3TS
The Absolute Time of MBMS Data Transfer indicates the absolute time of the actual start, update or stop of the MBMS data transfer to ensure a synchronized session control and facilitate a graceful reallocation of resources for the MBSFN (MBMS Single Frequency Network) when needed for E-UTRAN access.
It is coded as shown in figure 8.95-1.
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Bits |
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Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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1 |
Type = 164 (decimal) |
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2 to 3 |
Length = n |
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4 |
Spare |
Instance |
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5 to 12 |
Absolute Time of MBMS Data Transfer value part |
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13 to (n+4) |
These octet(s) is/are present only if explicitly specified |
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Figure 8.95-1: Absolute Time of MBMS Data Transfer
Octets 5 to 12 are coded as the time in seconds relative to 00:00:00 on 1 January 1900 (calculated as continuous time without leap seconds and traceable to a common time reference) where binary encoding of the integer part is in the 32 most significant bits and binary encoding of the fraction part in the 32 least significant bits. The fraction part is expressed with a granularity of 1 /2**32 second.