8.44 UE Time Zone

29.2743GPP3GPP Evolved Packet System (EPS)Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C)Release 16Stage 3TS

UE Time Zone is used to indicate the offset between universal time and local time in steps of 15 minutes of where the UE currently resides. The "Time Zone" field uses the same format as the "Time Zone" IE in 3GPP TS 24.008 [5].

UE Time Zone is coded as this is depicted in Figure 8.44-1. The value of the Time Zone field represents the time zone adjusted for daylight saving time. The value of the Daylight Saving Time field specifies the adjustment that has been made.

The spare bits indicate unused bits, which shall be set to 0 by the sending side and which shall not be evaluated by the receiving side.

Bits

Octets

8

7

6

5

4

3

2

1

1

Type = 114 (decimal)

2 to 3

Length = n

4

Spare

Instance

5

Time Zone

6

Spare

Daylight Saving Time

7 to (n+4)

These octet(s) is/are present only if explicitly specified

Figure 8.44-1: UE Time Zone

Table 8.44-2 Possible values for the "Daylight Saving Time" field and their meanings.

Daylight Saving Time

Value (binary)

Bit 2

Bit 1

No adjustment for Daylight Saving Time

0

0

+1 hour adjustment for Daylight Saving Time

0

1

+2 hours adjustment for Daylight Saving Time

1

0

Spare

1

1