name: APN
full_form: Access Point Name
context: The protocol responsible for providing signalling information across the Iur interface is called the Radio Network Subsystem Application Part (RNSAP). A subset of RNSAP is used over the Iur-g interface. The RNSAP is terminated by the two RNCs inter-connected via the Iur interface RNSAP Procedure Modules. In addition, the RNSAP is terminated by a RNC and a BSS supporting Iu mode inter-connected via the Iur-g interface (TR 43.930 [17]). For 1.28Mcps TDD, the RNSAP may be terminated by a RNC and a BSS supporting A/Gb mode inter-connected via the Iur-g interface. RNSAP procedures are divided into four modules as follows: 1. RNSAP Basic Mobility Procedures; 2. RNSAP Dedicated Procedures; 3. RNSAP Common Transport Channel Procedures; 4. RNSAP Global Procedures; 5. RNSAP MBMS Procedures. The Basic Mobility Procedures module contains procedures used to handle the mobility within UTRAN as well as to handle mobility in case of UTRAN/GERAN interworking. The Dedicated Procedures module contains
description: The Access Point Name (APN) is a unique identifier used to identify an MBMS service. It is requested by the DRNC along with the IP multicast address for an MBMS service identified by TMGI, and is exchanged between RNCs controlling neighboring cells for selective/soft combining in case of inter-RNC synchronization.
explanation: APN is classified as an Identifier because it serves the primary function of uniquely identifying a specific MBMS service. The text emphasizes its use in requesting and exchanging information related to identified MBMS services.
section_title: 8.2.13	Information Exchange over Iur
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