8.87 EPC Timer
29.2743GPP3GPP Evolved Packet System (EPS)Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C)Release 18Stage 3TS
The purpose of the EPC Timer information element is to specify EPC specific timer values.
The EPC Timer information element is coded as shown in figure 8.87-1 and table 8.87.1
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Bits |
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Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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1 |
Type = 156 (decimal) |
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2 to 3 |
Length = n |
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4 |
Spare |
Instance |
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5 |
Timer unit |
Timer value |
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6 to (n+4) |
These octet(s) is/are present only if explicitly specified |
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Figure 8.87-1: EPC Timer
Table 8.87.1: EPC Timer information element
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Timer value Bits 5 to 1 represent the binary coded timer value. Timer unit Bits 6 to 8 defines the timer value unit for the EPC timer as follows: Bits 8 7 6 0 0 0 value is incremented in multiples of 2 seconds 0 0 1 value is incremented in multiples of 1 minute 0 1 0 value is incremented in multiples of 10 minutes 0 1 1 value is incremented in multiples of 1 hour 1 0 0 value is incremented in multiples of 10 hours 1 1 1 value indicates that the timer is infinite Other values shall be interpreted as multiples of 1 minute in this version of the protocol. Timer unit and Timer value both set to all "zeros" shall be interpreted as an indication that the timer is stopped. |