name: NAS
full_form: Non Access Stratum
context: In the MOCN configuration only the radio access part of the network is shared. For the MOCN configuration it is required that the rerouting function, as described in TS 25.410 [29], is supported. In the GWCN configuration, besides shared radio access network, the core network operators also share part of the core network, at least MSC and/or SGSN. For both the GWCN and MOCN configurations, the RNC carries the selected PLMN-id between network sharing supporting UEs and the corresponding CN. The network sharing MOCN and GWCN configurations are described in detail in TS 23.251 [28].
description: The Non-Access Stratum (NAS) is a protocol layer responsible for managing the signaling connection between the User Equipment (UE) and the Core Network (CN). It enables the exchange of control messages, such as service requests and location updates, between the UE and CN. The NAS protocol plays a crucial role in establishing and maintaining the signaling connection, allowing the UE to initiate services or respond to paging from the CN.
explanation: The context describes NAS as a layer that manages signaling connections and controls message exchange between network entities. This definition aligns with the core function of a protocol: defining rules and formats for communication.
section_title: 7.2	NAS Signalling Connection Establishment
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