在5G(NR)網絡中PDU會話的建立過程與LTE系統(tǒng)中PDN建立相同。PDU會話建立的主要目的是為UE分配IP地址，通知UE網絡中相關單元(應用層單元)IP地址,以便終端的業(yè)務溝通和數據傳遞;而PDU建立的消息主要結構包括以下內容:

整理：kangguoying20200810

1.PDU進行類型(PDU session type)

• IPv4

• IPv6整理：kangguoying20200810

• IPv4v6整理：kangguoying20200810

• Unstructured

• Ethernet整理：kangguoying20200810

• reserved整理：kangguoying20200810

2.SSC會話和服務模式

•               SSC mode 1整理：kangguoying20200810

• SSC mode 2

• SSC mode 3整理：kangguoying20200810

• unused; shall be interpreted as "SSC mode 1", if received by the network

• unused; shall be interpreted as "SSC mode 2", if received by the network整理：kangguoying20200810

• unused; shall be interpreted as "SSC mode 3", if received by the network

3.5G進程管理能力(SM capability )

        RqoS整理：kangguoying20200810

                0 Reflective QoS not supported 0(QOS不支持)

                1 Reflective QoS supported   1 (QOS支持)整理：kangguoying20200810

       Multi-homed IPv6 PDU session (MH6-PDU)  (多宿主IPv6 PDU 會話(

                0 Multi-homed IPv6 PDU session not supported整理：kangguoying20200810

                1 Multi-homed IPv6 PDU session supported整理：kangguoying20200810

4.在線指示(Always-on PDU session indication)

                 Always-on PDU session not allowed

               Always-on PDU session required 整理：kangguoying20200810

      Always-on PDU session requested 整理：kangguoying20200810

               0 Always-on PDU session not requested

               1 Always-on PDU session requested整理：kangguoying20200810

5. DN請求內容(SM PDU DN request container)

              Dn 特定的ID: 根據IETF RFC 7542的網絡訪問標識符(NAI)格式整理：kangguoying20200810

6.協(xié)議擴展配置選項

            擴展協(xié)議配置選項的長度整理：kangguoying20200810

            擴展的協(xié)議配置選項內容(TS 24.008-10.5.6.3)

7. PDU建立消息實例

            {  message c1: ulInformationTransfer: {整理：kangguoying20200810

                criticalExtensions ulInformationTransfer: {整理：kangguoying20200810

                  dedicatedNAS-Message '7E02FF096300027E006701001E2E0509C1FFFF93A17B001380000A00000

                                                  200000100000C00000300000D00120581250403696D73'H    }  }} 

            Message: UL NAS transport
            Data:整理：kangguoying2020整理：kangguoying202008100810

            Protocol discriminator = 0x7e (5GS Mobility Management)

            Security header = 0x2 (Integrity protected and ciphered)

            Auth code = 0xff096300整理：kangguoying20200810

            Sequence number = 0x02整理：kangguoying20200810

            Protocol discriminator = 0x7e (5GS Mobility Management)

            Security header = 0x0 (Plain 5GS NAS message, not security protected)

            Message type = 0x67 (UL NAS transport)整理：kangguoying20200810

            Payload container type = 1 (N1 SM information)

            Payload container:整理：kangguoying20200810

              Protocol discriminator = 0x2e (5GS Session Management)

              PDU session identity = 5整理：kangguoying20200810

              Procedure transaction identity = 9

              Message type = 0xc1 (PDU session establishment request)

              Integrity protection maximum data data:整理：kangguoying20200810

                Maximum data rate per UE for user-plane integrity protection

                                                 for uplink = 0xff (Full data rate)整理：kangguoying20200810

                Maximum data rate per UE for user-plane integrity protection

                                                 for downlink = 0xff (Full data rate)整理：kangguoying20200810

              PDU session type = 0x3 (IPv4v6)

              SSC mode = 0x1 (1)整理：kangguoying20200810

              Extended protocol configuration options:

                Ext = 1整理：kangguoying20200810

                Configuration protocol = 0整理：kangguoying20200810

                Protocol ID = 0x000a (IP address allocation via NAS signalling)

                Data =    Protocol ID = 0x0002 (IM CN Subsystem Signaling Flag)

                Data =    Protocol ID = 0x0001 (P-CSCF IPv6 Address Request)

                Data =    Protocol ID = 0x000c (P-CSCF IPv4 Address Request)

                Data =    Protocol ID = 0x0003 (DNS Server IPv6 Address Request)

                Data =    Protocol ID = 0x000d (DNS Server IPv4 Address Request)

                Data =    PDU session ID = 5整理：kangguoying20200810

            Request type = 0x1 (initial request)整理：kangguoying20200810

            DNN = "ims" 

原文來自:http://www.sharetechnote.com/   整理：kangguoying20200810