3GPP TS 23502-g40 中英文对照 | 4.17.6 SMF Provisioning of available UPFs using the NRF

Posted 2021-09-12 COCOgsta

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4.17.6 SMF Provisioning of available UPFs using the NRF

4.17.6.1 General

This clause describes the provisioning of available UPFs in SMF using the NRF as documented in TS 23.501 [2], clause 6.3.3.

本条描述了使用TS 23.501[2]第6.3.3条中记录的NRF在SMF中提供可用的UPF。

This optional node-level step takes place prior to selecting the UPF for PDU Sessions and may be followed by N4 Node Level procedures defined in clause 4.4.3 where the UPF and the SMF exchange information such as the support of optional functionalities and capabilities.

此可选node-level步骤发生在为PDU Session选择UPF之前，随后可能会出现第4.4.3条中定义的N4 Node Level程序，其中UPF和SMF交换信息，例如可选功能和能力的支持。

As an option, UPF(s) may register in the NRF. This registration phase uses the Nnrf_NFManagement_NFRegister operation and hence does not use N4.

作为一种选择，UPF可以在NRF中注册。此注册阶段使用Nnrf_NFManagement_NFRegister操作，因此不使用N4。

For the purpose of SMF provisioning of available UPFs, the SMF uses the Nnrf_NFManagement_NFStatusSubscribe, Nnrf_NFManagement_NFStatusNotify and Nnrf_NFDiscovery services to learn about available UPFs.

为了SMF提供可用的UPF，SMF使用Nnrf_NFManagement_NFStatusSubscribe、Nnrf_NFManagement_NFStatusNotify和Nnrf_NFDiscovery服务了解可用的UPF。

NOTE 1: The protocol used by UPF to interact with NRF is described in TS 29.510 [37]

注1:TS 29.510[37]中描述了UPF用于与NRF交互的协议

UPFs may be associated with UPF Provisioning Information in the NRF. The UPF Provisioning Information consists of:

UPF可与NRF中的UPF Provisioning Information相关联。UPF Provisioning Information包括：

- a list of (S-NSSAI, DNN);

-（S-NSSAI，DNN）的列表；

- UE IPv4 Address Ranges and/or IPv6 Prefix Range(s) per (S-NSSAI, DNN); and

-UE IPv4 Address Range和/或IPv6 Prefix Range（S-NSSAI，DNN）；和

NOTE 2: The above information can be used by the SMF for UPF selection when static IP address/prefix allocation is required for a UE.

注2：当UE需要静态IP地址/前缀分配时，SMF可将上述信息用于UPF选择。

- a SMF Area Identity the UPF can serve. The SMF Area Identity allows limiting the SMF provisioning of UPF(s) using NRF to those UPF(s) associated with a certain SMF Area Identity. This can e.g. be used if an SMF is only allowed to control UPF(s) configured in NRF as belonging to a certain SMF Area Identity.

-UPF可以服务的SMF Area Identity。SMF Area Identity允许将使用NRF的UPF的SMF配置限制为与特定SMF Area Identity关联的UPF。例如，如果SMF仅允许控制NRF中配置为属于某个SMF Area Identity的UPF，则可以使用此功能。

- the supported ATSSS steering functionality, i.e. whether MPTCP functionality or ATSSS-LL functionality or both are supported.

-受支持的ATSSS控制功能，即MPTCP功能或ATSSS-LL功能或两者均受支持。

The SMF Area Identity and UE IPv4 Address Ranges and/or IPv6 Prefix Range(s) are optional in the UPF Provisioning Information.

SMF Area Identity和UE IPv4 Address Range和/或IPv6 Prefix Range在UPF Provisioning Information中是可选的。

4.17.6.2 SMF provisioning of UPF instances using NRF

This procedure applies when a SMF wants to get informed about UPFs available in the network and supporting a list of parameters.

当SMF希望了解网络中可用的UPF及支持参数列表时，此过程适用。

 

Figure 4.17.6.2-1: SMF provisioning of UPF instances using NRF procedure

The following takes place when an SMF expects to be informed of UPFs available in the network:

当SMF希望收到网络中可用UPF的通知时，会发生以下情况：

1. The SMF issues a Nnrf_NFManagement_NFStatusSubscribe Service Operation providing the target UPF Provisioning Information it is interested in.
   
   1 SMF发布Nnrf_NFManagement_NFStatusSubscribe Service Operation，提供其感兴趣的目标UPF Provisioning Information。
2. The NRF issues Nnrf_NFManagement_NFStatusNotify with the list of all UPFs that currently meet the SMF subscription. This notification indicates the subset of the target UPF Provisioning Information that is supported by each UPF.
   
   2 NRF发布Nnrf_NFManagement_NFStatusNotify以及当前满足SMF订阅的所有UPF的列表。此通知表示每个UPF支持的目标UPF Provisioning Information的子集。

The following takes place when a new UPF instance is deployed:

部署新的UPF实例时会发生以下情况：

1. At any time a new UPF instance is deployed.
   
   3 随时部署新的UPF实例。
2. The UPF instance is configured with the NRF identity to contact for registration and with its UPF Provisioning Information. An UPF is not required to understand the UPF Provisioning Information beyond usage of this information to register in step 5.
   
   4 UPF实例配置了要联系以进行注册的NRF标识及其UPF Provisioning Information。UPF不需要了解UPF Provisioning Information，只需要在步骤5中使用该信息进行注册即可。
3. The UPF instance issues an Nnrf_NFManagement_NFRegister Request operation providing its NF type, the FQDN or IP address of its N4 interface, and the UPF Provisioning Information configured in step 4.
   
   5 UPF实例发出Nnrf_NFManagement_NFRegister Request操作，提供其NF类型、其N4接口的FQDN或IP地址以及在步骤4中配置的UPF Provisioning Information。

1. Alternatively (to steps 4 and 5) OAM registers the UPF on the NRF indicating the same UPF Provisioning Information as provided in step 5. This configuration mechanism is out of scope of this specification.
   
   6.或者（对于步骤4和5），OAM在NRF上注册UPF，指示步骤5中提供的相同UPF Provisioning Information。此配置机制不在本规范的范围内。
2. Based on the subscription in step 1, the NRF issues Nnrf_NFManagement_NFStatusNotify to all SMFs with a subscription matching the UPF Provisioning Information of the new UPF
   
   7.根据步骤1中的订阅，NRF向所有SMF发出Nnrf_NFManagement_NFStatusNotify，订阅与新UPF的UPF Provisioning Information匹配