8.18 Serving Network

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

Serving Network is coded as depicted in Figure 8.18-1.

Bits

Octets

8

7

6

5

4

3

2

1

1

Type = 83 (decimal)

2 to 3

Length = n

4

Spare

Instance

5

MCC digit 2

MCC digit 1

6

MNC digit 3

MCC digit 3

7

MNC digit 2

MNC digit 1

8 to (n+4)

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

Figure 8.18-1: Serving Network

If an Administration decides to include only two digits in the MNC, then bits 5 to 8 of octet 6 are coded as "1111".

Unless specified otherwise in the specification, this IE contains the serving core network operator ID provided by the MME, S4-SGSN or ePDG, or the PLMN identity of the selected PLMN used for 3GPP-based access authentication provided by the TWAN.

NOTE: The serving core network operator ID is the PLMN ID of the MME, S4-SGSN or ePDG which is currently serving the UE. An S4-SGSN/MME which supports multiple PLMN IDs is considered as logically different S4-SGSNs/MMEs.