name: NRI
full_form: Network Resource Identifier
context: The overall UMTS architecture and UTRAN architectures are described in [137]. This subclause specifies only the architecture of the Iu interface when applied for 3G HNB access. Whereas the Iu interface is specified at the boundary between the Core Network and UTRAN, the Iuh- interface is specified between the 3G HNB GW and the 3G HNB. Figure 7.3.1-1 depicts the logical division of the Iu interface and the Iuh interface. From the Iu interface perspective, the UTRAN access point is an 3G HNB GW. Figure 7.3.1-1. Iu and Iuh Interface Architecture. The 3G HNB and 3G HNB GW in combination supports all of the UTRAN functions, as described in section 4 of [135]. The legacy UTRAN functions in the 3G HNB are supported by RANAP, whereas the functions 3G HNB Registstration, UE Registration and 3G HNB GW discovery (FFS) are supported by the new protocol Home NodeB Application Protocol (HNBAP) between the 3G HNB and the 3G HNB GW. These functions are described in section 7.3.4.2. The 3G HNB GW
description: The Network Resource Identifier (NRI) is a unique identifier used to derive the address of a specific Core Network (CN) node for a relevant domain, either Circuit Switched (CS) or Packet Switched (PS). The NRI is utilized by the Radio Network Controller (RNC) to route initial NAS signalling messages to the appropriate CN node based on the configured association between NRI values and CN node addresses.
explanation: The context describes the NRI as a unique identifier used to locate a specific Core Network node. This function of identifying a particular entity within a network aligns with the definition of an Identifier.
section_title: 6.2.1.1	RNC Functions
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