Section: 15.5 Addressing and identification for Bootstrapping MBMS Service Announcement
Content: The UE needs a Service Announcement Fully Qualified Domain Name (FQDN) to bootstrap MBMS Service Announcement as specified in 3GPP TS 26.346[ Multimedia Broadcast/Multicast Service (MBMS); Protocols and codecs ]  [105]. The Service Announcement FQDN is composed of six labels. The last three labels shall be "pub.3gppnetwork.org". The second and third labels together shall uniquely identify the PLMN. The first label shall be "mbmsbs". The Service Announcement FQDN is derived from the IMSI or Visited PLMN Identity as follows: "mbmsbs.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org" where: "mnc" and "mcc" serve as invariable identifiers for the following digits. - When using the Service Announcement FQDN in a visited network, the <MNC> and <MCC> shall be derived from the visited PLMN Identity as defined in clause 12.1. - When using the Service Announcement FQDN in the home network, the <MNC> and <MCC> shall be derived from the components of the IMSI as defined in clause 2.2. In order to guarantee inter-PLMN DNS translation, the <MNC> and <MCC> coding used in the "mbmsbs.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org" format of the Service Announcement FQDN shall be: - <MNC> = 3 digits - <MCC> = 3 digits If there are only 2 significant digits in the MNC, one "0" digit shall be inserted at the left side to fill the 3 digits coding of MNC in the Service Announcement FQDN. As an example, the Service Announcement FQDN for MCC 345 and MNC 12 is coded in the DNS as: "mbmsbs.mnc012.mcc345.pub.3gppnetwork.org".