在5G(NR)的網(wǎng)絡中PDU會話建立的主要目的是為UE分配IP地址，通知UE網(wǎng)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(shù)據(jù)傳遞; 整理：kangguoying20200811

       在PDU建立接受消息結(jié)構(gòu)中包括：業(yè)務進程能力（SM capability）；進程原因；進程指示；一直在線指示和協(xié)議擴展配置選項外還有數(shù)據(jù)業(yè)務的計時（數(shù)）器等，詳細內(nèi)容如下： 整理：kangguoying20200811

 整理：kangguoying20200811

1.數(shù)據(jù)包計時器（GPRS Timer）

GPRS Timer IEI 整理：kangguoying20200811

Timer Value  Unit 整理：kangguoying20200811

value is incremented in multiples of 2 seconds

value is incremented in multiples of 1 minute

value is incremented in multiples of decihours 整理：kangguoying20200811

value indicates that the timer is deactivated. 

2.核心網(wǎng)承載映射（Mapped EPS bearer contexts）

Length of Mapped EPS bearer contexts contents

Mapped EPS bearer context 1 整理：kangguoying20200811

EPS bearer identity

Length of Mapped EP 整理：kangguoying20200811S bearer context

Number of EPS parameters

Ebit 整理：kangguoying20200811

Operation code 整理：kangguoying20200811

EPS parameters list

EPS parmeter identifier 1 整理：kangguoying20200811

Length of EPS parameter contents 1

EPS parameter contents 1

EPS parmeter identifier 2

Length of EPS parameter contents 2

EPS parameter contents 2

...

EPS parmeter identifier n

Length of EPS parameter contents n

EPS parameter contents n

Mapped EPS bearer context 2 整理：kangguoying20200811

EPS bearer identity 整理：kangguoying20200811

Length of Mapped EPS bearer context

Number of EPS parameters

Ebit 整理：kangguoying20200811

Operation code 整理：kangguoying20200811

EPS parameters list

EPS parmeter identifier 1 整理：kangguoying20200811

Length of EPS parameter contents 1

EPS parameter contents 1

EPS parmeter identifier 2 整理：kangguoying20200811

Length of EPS parameter contents 2

EPS parameter contents 2

...

EPS parmeter identifier n 整理：kangguoying20200811

Length of EPS parameter contents n

EPS parameter contents n

...

Mapped EPS bearer context N

EPS bearer identity 整理：kangguoying20200811

Length of Mapped EPS bearer context

Number of EPS parameters

Ebit 整理：kangguoying20200811

Operation code 整理：kangguoying20200811

EPS parameters list

EPS parmeter identifier 1

Length of EPS parameter contents 1

EPS parameter contents 1 整理：kangguoying20200811

EPS parmeter identifier 2

Length of EPS parameter contents 2

EPS parameter contents 2

...

EPS parmeter identifier n

Length of EPS parameter contents n

EPS parameter contents n

3.PDU業(yè)務進程的最大速率Session-AMBR (Aggregate Maximum Bit Rate) 

        TS24.501-9.11.4.14中規(guī)定PDU業(yè)務進程的速率根據(jù)其調(diào)制方式，其速率分為多級：

Session-AMBR IEI 整理：kangguoying20200811

value is not used

value is incremented in multiples of 1 Kbps

value is incremented in multiples of 4 Kbps

value is incremented in multiples of 16 Kbps

value is incremented in multiples of 64 Kbps

value is incremented in multiples of 256 kbps

value is incremented in multiples of 1 Mbps 整理：kangguoying20200811

value is incremented in multiples of 4 Mbps

value is incremented in multiples of 16 Mbps

value is incremented in multiples of 64 Mbps

value is incremented in multiples of 256 Mbps

value is incremented in multiples of 1 Gbps 整理：kangguoying20200811

value is incremented in multiples of 4 Gbps

value is incremented in multiples of 16 Gbps

value is incremented in multiples of 64 Gbps

value is incremented in multiples of 256 Gbps

value is incremented in multiples of 1 Tbps

value is incremented in multiples of 4 Tbps

value is incremented in multiples of 16 Tbps

value is incremented in multiples of 64 Tbps

value is incremented in multiples of 256 Tbps

value is incremented in multiples of 1 Pbps

value is incremented in multiples of 4 Pbps

value is incremented in multiples of 16 Pbps

value is incremented in multiples of 64 Pbps

value is incremented in multiples of 256 Pbps

Length of Session-AMBR contents 整理：kangguoying20200811

Unit for Session-AMBR for downlink

Session-AMBR for downlink 整理：kangguoying20200811

Unit for Session-AMBR for uplink

Session-AMBR for uplink 整理：kangguoying20200811

4.SM PDU DN（業(yè)務PDU DN)

            網(wǎng)絡接入標識（NAI)根據(jù)見IETF RFC 7542 ；

5.終端網(wǎng)絡切片標識

         S-NSSAI IEI

        Length of S-NSSAI contents 整理：kangguoying20200811

        SST 整理：kangguoying20200811

        SST and mapped HPLMN SST

        SST and SD 整理：kangguoying20200811

        SST, SD and mapped HPLMN SST 整理：kangguoying20200811

        SST, SD, mapped HPLMN SST and mapped HPLMN SD

        SST(Slice/service type) 整理：kangguoying20200811

        SD(Slice differentiator) 整理：kangguoying20200811

        Mapped HPLMN SST

        Mapped HPLMN SD 整理：kangguoying20200811

8.PDU建立接受消息實例

  {  message c1: dlInformationTransfer: {

      rrc-TransactionIdentifier 0, 整理：kangguoying20200811

      criticalExtensions dlInformationTransfer: { 整理：kangguoying20200811

      dedicatedNAS-Message '7E0206FC019B027E0054431081C176589E9EBFCD7490B34CBFBFE56

                            B450981C176589E9EBFCD7446404791118261539040490100'H    }  }} 

Protocol discriminator = 0x7e (5GS Mobility Management) 整理：kangguoying20200811

Security header = 0x2 (Integrity protected and ciphered)

Auth code = 0x66f143b0 整理：kangguoying20200811

Sequence number = 0x03 整理：kangguoying20200811

Protocol discriminator = 0x7e (5GS Mobility Management)

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

Message type = 0x68 (DL NAS transport) 整理：kangguoying20200811

Payload container type = 1 (N1 SM information)

Payload container: 整理：kangguoying20200811

  Protocol discriminator = 0x2e (5GS Session Management)

  PDU session identity = 5 整理：kangguoying20200811

  Procedure transaction identity = 9

  Message type = 0xc2 (PDU session establishment accept)

  Selected PDU session type = 0x3 (IPv4v6)

  Selected SSC mode = 0x1 (1) 整理：kangguoying20200811

  Authorized QoS rules:

    QoS rule 1:

      QoS rule identifier = 1 整理：kangguoying20200811

      Rule operation code = 1 (create new QoS rule)

      DQR = 1 (the QoS rule is the default QoS rule)

      Number of packet filters = 1 整理：kangguoying20200811

      Packet filter identifier = 15

        Packet filter direction = 3 (bidirectional)

        Match-all 整理：kangguoying20200811

      QoS rule precedence = 255

      QFI = 1

  Session AMBR: 整理：kangguoying20200811

    Session-AMBR for downlink = 3000000 kbps

    Session-AMBR for uplink = 1000000 kbps

  PDU address: 整理：kangguoying20200811

    PDU session type = 3 (IPv4v6)

    IPv6 = ::2001:468:3000:1

    IPv4 = 192.168.4.2 整理：kangguoying20200811

  Authorized QoS flow descriptions:

    QoS flow description 1:

      QFI = 1 整理：kangguoying20200811

      Operation code = 1 (create new QoS flow description)

      E = 1 (parameters list is included)

      Number of parameters = 1

      5QI = 5

  Extended protocol configuration options:

    Ext = 1 整理：kangguoying20200811

    Configuration protocol = 0

    Protocol ID = 0x000d (DNS Server IPv4 Address)

    Data = 8.8.8.8 整理：kangguoying20200811

    Protocol ID = 0x0003 (DNS Server IPv6 Address)

    Data = 2001:4860:4860:0:0:0:0:8888

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

    Data = 192.168.4.1 整理：kangguoying20200811

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

    Data = 2001:468:3000:1:0:0:0:0

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

    Data = 整理：kangguoying20200811

  DNN = "ims.mnc001.mcc001.gprs"

  PDU session ID = 5 

原文來自:http://www.sharetechnote.com/   整理：kangguoying20200811