name: RAI
full_form: Routing Area Identification
context: The Routing Area Identification shall be composed as shown in figure 4: Figure 4: Structure of Routing Area Identification The RAI is composed of the following elements: - A valid Location Area Identity (LAI) as defined in clause 4.1. Invalid LAI values are used in some special cases when no valid RAI exists in the mobile station (see 3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  [5], 3GPP TS 31.102[ Characteristics of the Universal Subscriber Identity Module (USIM) application ]  [27] and 3GPP TS 51.011[ Specification of the Subscriber Identity Module - Mobile Equipment (SIM-ME) interface ]  [9]). - Routeing Area Code (RAC) which is a fixed length code (of 1 octet) identifying a routeing area within a location area.
description: The Routing Area Identification (RAI) is a unique identifier used in mobile networks to identify a specific routing area within a location area. It is composed of two elements: the Location Area Identity (LAI) and the Routing Area Code (RAC). The LAI is a valid identity as defined in clause 4.1, while the RAC is a fixed-length code of 1 octet that identifies a routing area within a location area. The RAI plays a crucial role in routing and mobility management in mobile networks.
explanation: RAI is classified as an Identifier because it serves as a unique identifier for routing areas within location areas, enabling efficient routing and mobility management in mobile networks, as specified in various 3GPP technical specifications such as TS 24.008, TS 31.102, and TS 51.011.
section_title: 4.2 Composition of the Routing Area Identification (RAI)
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