12.33 Temporary Mobile Group Identity (TMGI)

3GPP44.060General Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 17TS

The Temporary Mobile Group Identity (TMGI) identifies an MBMS service. The TMGI is defined in 3GPP TS 24.008.

The Temporary Mobile Group Identity information element always contains an MBMS SERVICE ID. In case the TMGI originates from another PLMN than the local one, the MCC (Mobile Country Code) and the MNC (Mobile Network Code) of that originating PLMN shall also be present.

Table 12.33.1: TMGI information element

< TMGI IE > ::= { 0 — without MCC and MNC parameters < MBMS SERVICE ID : bit (24) > | 1 — with MCC and MNC parameters < MBMS SERVICE ID : bit (24) > < MCC : bit (12) > < MNC : bit (12) > } ;

Table 12.33.2: TMGI information element details

MBMS SERVICE ID (24 bit field) This field contains the identity of the MBMS service. The MBMS SERVICE ID is unique within a PLMN. MCC (12 bit field) This field contains the Mobile Country Code of the originating PLMN. MNC (12 bit field) This field contains the Mobile Network Code of the originating PLMN.