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- Non-access stratum (NAS) is a functional layer in the NR, LTE, UMTS and GSM wireless telecom protocol stacks between the core network and user equipment. This layer is used to manage the establishment of communication sessions and for maintaining continuous communications with the user equipment as it moves. The NAS is defined in contrast to the Access Stratum which is responsible for carrying information over the wireless portion of the network.A further description of NAS is that it is a protocol for messages passed between the User Equipment, also known as mobiles, and Core Nodes (e.g. Mobile Switching Center, Serving GPRS Support Node, or Mobility Management Entity) that is passed transparently through the radio network. Examples of NAS messages include Update or Attach messages, Authentication Messages, Service Requests and so forth. Once the User Equipment (UE) establishes a radio connection, the UE uses the radio connection to communicate with the core nodes to coordinate service. The distinction is that the Access Stratum is for dialogue explicitly between the mobile equipment and the radio network and the NAS is for dialogue between the mobile equipment and core network nodes. For LTE, the Technical Specification for NAS is 3GPP TS 24.301. For NR, the Technical Specification for NAS is TS 24.501. +- – - – - -+ +- – - – - – -+| HTTP | | Application |+- – - – - -+ +- – - – - – -+| TCP | | Transport |+- – - – - -+ +- – - – - – -+| IP | | Internet |+- – - – - -+ +- – - – - – -+| NAS | | Network |+- – - – - -+ +- – - – - – -+| AS | | Link |+- – - – - -+ +- – - – - – -+| Channels | | Physical |+- – - – - -+ +- – - – - – -+ (en)
- NAS(Non Access Stratum)는 UMTS 프로토콜 스택에서 UE와 간의 시그널링, 트래픽 메시지를 주고 받기 위한 기능적인 계층이다. NAS 영역의 하부에는 Mobile Management영역이, 상부에는 Communication Management영역이 있다. 회선영역과 패킷 영역으로도 구분할 수 있다 (ko)
- 非接入层（原名NAS，Non-access stratum）存在于 , LTE, UMTS 和 GSM的无线通信协议栈中，作为核心网与之间的功能层。该层支持在这两者之间的信令和数据传输。 +- – - – - – - – - – - -+ +- – - – - – -+| 超文本傳輸協定（HTTP） | | 應用層 |+- – - – - – - – - – - -+ +- – - – - – -+| 傳輸控制協議（TCP） | | 傳輸層 |+- – - – - – - – - – - -+ +- – - – - – -+| 網際協議（IP） | | |+- – - – - – - – - – - -+ +- – - – - – -+| 非接入層（NAS） | | 網路層 |+- – - – - – - – - – - -+ +- – - – - – -+| （AS） | | 資料連結層 |+- – - – - – - – - – - -+ +- – - – - – -+| 信道（Channels） | | 物理層 |+- – - – - – - – - – - -+ +- – - – - – -+ (zh)
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- NAS(Non Access Stratum)는 UMTS 프로토콜 스택에서 UE와 간의 시그널링, 트래픽 메시지를 주고 받기 위한 기능적인 계층이다. NAS 영역의 하부에는 Mobile Management영역이, 상부에는 Communication Management영역이 있다. 회선영역과 패킷 영역으로도 구분할 수 있다 (ko)
- 非接入层（原名NAS，Non-access stratum）存在于 , LTE, UMTS 和 GSM的无线通信协议栈中，作为核心网与之间的功能层。该层支持在这两者之间的信令和数据传输。 +- – - – - – - – - – - -+ +- – - – - – -+| 超文本傳輸協定（HTTP） | | 應用層 |+- – - – - – - – - – - -+ +- – - – - – -+| 傳輸控制協議（TCP） | | 傳輸層 |+- – - – - – - – - – - -+ +- – - – - – -+| 網際協議（IP） | | |+- – - – - – - – - – - -+ +- – - – - – -+| 非接入層（NAS） | | 網路層 |+- – - – - – - – - – - -+ +- – - – - – -+| （AS） | | 資料連結層 |+- – - – - – - – - – - -+ +- – - – - – -+| 信道（Channels） | | 物理層 |+- – - – - – - – - – - -+ +- – - – - – -+ (zh)
- Non-access stratum (NAS) is a functional layer in the NR, LTE, UMTS and GSM wireless telecom protocol stacks between the core network and user equipment. This layer is used to manage the establishment of communication sessions and for maintaining continuous communications with the user equipment as it moves. The NAS is defined in contrast to the Access Stratum which is responsible for carrying information over the wireless portion of the network.A further description of NAS is that it is a protocol for messages passed between the User Equipment, also known as mobiles, and Core Nodes (e.g. Mobile Switching Center, Serving GPRS Support Node, or Mobility Management Entity) that is passed transparently through the radio network. Examples of NAS messages include Update or Attach messages, Authe (en)
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- Non Access Stratum (ko)
- Non-access stratum (en)
- 非接入层 (zh)
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