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  • 5G核心网SMFUPF拓扑增强技术研究2020年电子技术应用第11期邢燕霞,聂 衡中国电信股份有限公司研究院,北京102209摘要: 3GPP R15版本存在不支持跨SMF服务区切换和归属地路由等问题,为解决这些问题,R16版本定义了...

    5G核心网SMF和UPF拓扑增强技术研究

    2020年电子技术应用第11期

    邢燕霞,聂 衡

    中国电信股份有限公司研究院,北京102209

    摘要: 3GPP R15版本存在不支持跨SMF服务区切换和归属地路由等问题,为解决这些问题,R16版本定义了ETSUN技术。主要介绍ETSUN的需求场景、技术方案以及通信流程,提出了ETSUN的引入建议以及对R15版本网络的增强需求。研究内容将对相关工作者研究ETSUN技术方案以及对网络设备的技术要求有一定的帮助。

    中图分类号: TN929.5

    文献标识码: A

    DOI:10.16157/j.issn.0258-7998.200991

    中文引用格式: 邢燕霞,聂衡. 5G核心网SMF和UPF拓扑增强技术研究[J].电子技术应用,2020,46(11):45-47,51.

    英文引用格式: Xing Yanxia,Nie Heng. Research on 5G Core network ETSUN technologies[J]. Application of Electronic Technique,2020,46(11):45-47,51.

    Research on 5G Core network ETSUN technologies

    Xing Yanxia,Nie Heng

    China Telecom Corporation Limited Research Institute,Beijing 102209,China

    Abstract: 3GPP R15 does not support handoff cross SMF service area and home routing. To solve this problem, ETSUN which is the one of new features of 3GPP Release 16 is introduced. In this paper ,the application scenes, technical solutions and communication flows are introduced,and recommendating about applying ESTUN and requirement of enhancing present R15 5G network are also proposed. This will be helpful to study ETSUN technical solutions and technical requirements of network equipment.

    Key words : inter SMF handover;home routing

    0 引言

    3GPP R15版本满足了5G增强移动宽带(enhanced Mobile BroadBand,eMBB)场景的基本通信需求,3GPP R16提出新的网络特性,在进一步完善eMBB能力的同时,也增强了对超可靠低延迟通信(Ultra-relaible and Low Latency Communication,URLLC)场景的支持,提升和拓展了5G网络服务2B和2C的能力,其中包括5G核心网的会话管理功能(Session Management Function,SMF)和用户面功能(User Plane Function,UPF)拓扑增强技术(Enhancing Topology of SMF and UPF in 5G Networks,ETSUN)特性。ETSUN重点解决了R15版本存在的归属地路由问题、用户跨SMF(会话管理功能)服务区业务中断问题以及会话过程中的IP地址分配等问题。

    本文将从ETSUN的需求出发,分析ETSUN的技术方案和通信流程,并提出ETSUN的引入建议和对当前R15版本的5G网络增强要求。

    作者信息:

    邢燕霞,聂  衡

    (中国电信股份有限公司研究院,北京102209)

    原创声明:此内容为AET网站原创,未经授权禁止转载。

    展开全文
  • 学习5G知识,势必要去阅读相关的技术标准,而纯英文的标准协议对于初学者来说是个门槛。 个人在学习5G标准3GPP TS 29244-g30过程...5.22.3 With one PFCP association per SMF and UPF每个SMFUPF具有一个PFCP关联 .

    学习5G知识,势必要去阅读相关的技术标准,而纯英文的标准协议对于初学者来说是个门槛。

    个人在学习5G标准3GPP TS 29244-g30过程中,也发现google的机器翻译实在晦涩难懂,所以个人在借助百度翻译(中国人更懂中文)的同时,人工对每句话进行了校对。

    在自己学习的同时,也将翻译内容分享给给广大网友。由于个人能力有限,翻译不到位的地方还请各位网友们指正。

    5.22.3 With one PFCP association per SMF and UPF 每个SMF和UPF具有一个PFCP关联

    If multiple PFCP associations are setup between an UPF and the SMFs in an SMF set, the following applies:

    如果在一个UPF和SMF集合中的SMF之间设置了多个PFCP偶联,则以下情况适用:

    1)Each SMF in the SMF set shall establish its own PFCP association with the UPF and shall provide the Node ID IE set to an FQDN or IP address of the SMF and the SMF Set ID IE set to an FQDN representing the SMF set. All SMFs of an SMF set shall indicate the same SMF Set ID.

    The SMF shall indicate that it supports the MPAS feature (Multiple PFCP Associations to the SMFs in an SMF set) in the CP Function Features IE (see clause 8.2.58); this indicates to the UPF that the PFCP sessions established with this PFCP association can be successively controlled by different SMFs of the same SMF set according to the procedure defined in this clause.

    The SMF may also provide a list of alternative IP addresses of PFCP entities pertaining to the same SMF in the PFCP Association Setup Request message.

    1)SMF集合中的每个SMF应与UPF建立自己的PFCP偶联,并应将Node ID IE集合提供给SMF的FQDN或IP地址,并将SMF Set ID IE集合提供给代表SMF集合的FQDN。一个SMF集合的所有SMF应表示相同的SMF Set ID。SMF应表明其支持CP Function Features IE中的MPAS特性;这向UPF表明,用该PFCP偶联建立的PFCP会话可以由同一SMF集的不同SMF连续控制。SMF还可以在PFCP Association Setup Request消息中提供与同一SMF相关的PFCP实体的备选IP地址的列表。

    The UPF and SMF shall identify the PFCP association by the Node ID of the SMF and UPF respectively.

    UPF和SMF应分别通过SMF和UPF的Node ID标识PFCP偶联

    Likewise, when an SMF is added or removed from the SMF set, this SMF shall establish or tear down its PFCP association with the UPF.

    同样,当从SMF集合中添加或删除SMF时,该SMF应建立或删除其与UPF的PFCP偶联

    2)When establishing a PFCP session, the SEID that the SMF assigns in the CP F-SEID of the PFCP Session Establishment Request may be unique or not within the SMF set. However the assigned CP F-SEID shall be unique within the SMF set.

    2)当建立PFCP会话时,SMF在PFCP Session Establishment Request的CP F-SEID中分配的SEID可以是唯一的或者不在SMF集合内。但是,指定的CP F-SEID在SMF集合中应是唯一的。

    NOTE 1: The UPF does not (need to) know whether the SEID in the CP F-SEID is uniquely assigned in the SMF set or not. The SMF and the UPF identifies the PFCP session by its own CP F-SEID and UP F-SEID respectively.

    注意1:UPF不(不需要)知道CP F-SEID中的SEID是否在SMF集中唯一分配。 SMF和UPF分别通过其自己的CP F-SEID和UP F-SEID标识PFCP会话。

    3)Any SMF in the SMF set may issue requests to modify or delete the PFCP session. When the SMF controlling a PFCP session changes, the SMF that takes over the control of the PFCP session shall provide its own Node ID and may provide a new CP F-SEID.

    3)SMF集合中的任何SMF都可以发出修改或删除PFCP会话的请求。当控制PFCP会话的SMF改变时,接管PFCP会话控制的SMF应提供其自己的Node ID并且可以提供新的CP F-SEID。

    The UPF shall allow the PFCP session modification or deletion request to come from any other PFCP association from the same SMF set.

    UPF应允许来自同一SMF集合的任何其他PFCP偶联的PFCP会话修改或删除请求。

    4)At any time, an SMF may update a PFCP session by including the CP F-SEID with the IPv4 or IPv6 address of a new SMF and/or a new SEID assigned by the new SMF in a PFCP Session Modification Request.

    4)在任何时候,SMF可以通过在PFCP Session Modification Request中包括具有新SMF的IPv4或IPv6地址的CP F-SEID和/或新SMF分配的新SEID来更新PFCP会话。

    5)An SMF may redirect a UPF initiated PFCP session related request to another PFCP entity pertaining to the same SMF or to a different SMF in the SMF set by rejecting the request with the cause "Redirection Requested" and with the IP address of the new entity to contact. When sending the redirected request to another PFCP entity pertaining to the same SMF or to the new SMF, the UPF shall set a null SEID in the header of the PFCP request and include the CP F-SEID assigned by the previous SMF in the request.

    5)SMF可以将UPF发起的PFCP会话相关请求重定向到属于同一SMF的另一个PFCP实体或SMF集中的另一个SMF,方法是拒绝该请求,原因是“Redirection Requested”和要联系的新实体的IP地址。当将重定向的请求发送到另一个与同一SMF或新SMF有关的PFCP实体时,UPF应在PFCP请求的头中设置一个空SEID,并在请求中包括由先前SMF分配的CP F-SEID。

    Alternatively, an SMF may forward the UPF request to another PFCP entity pertaining to the same SMF or another SMF in the SMF set; the new PFCP entity or the new SMF answers to the UPF, including the CP F-SEID IE with the IPv4 or IPv6 address of the new entity respectively and the same or a modified SEID, and optionally including the N4-u F-TEID that the UPF shall use for sending data towards the new entity.

    或者,SMF可以将UPF请求转发给与SMF中的同一SMF或另一SMF相关的另一PFCP实体;新PFCP实体或新SMF应答UPF,包括分别具有新实体的IPv4或IPv6地址的CP F-SEID IE和相同或修改的SEID,并且可选地包括UPF用于向新实体发送数据的N4-u F-TEID。

    NOTE 2: This allows to address cases where a different SMF would have been reselected in the 5GC for the PFCP session, e.g. by an AMF.

    注2:这允许解决在5GC中为PFCP会话重新选择了不同的SMF的情况,例如:由AMF。

    6)The UPF shall initiate PFCP session related requests (e.g. PFCP Session Report Request) towards another PFCP entity pertaining to the same SMF or to another SMF in the SMF set with which the UPF has established associations with the same SMF Set ID, if the IP address included in the CP F-SEID assigned to the PFCP session is not responsive, heartbeat failure towards IP address of the CP F-SEID assigned to the PFCP session, or if the UPF receives a GTP-U Error Indication from the SMF over the N4-u tunnel assigned to the N4 session for data forwarding.

    6)如果分配给PFCP会话的CP F-SEID中包含的IP地址没有响应,则UPF应向另一个PFCP实体发起PFCP会话相关请求,该请求涉及同一SMF或UPF与同一SMF Set ID建立偶联的SMF集合中的另一个SMF,向分配给PFCP会话的CP F-SEID的IP地址发送心跳故障,或者如果UPF通过分配给N4会话用于数据转发的N4-U隧道从SMF接收到GTP-U Error Indication

    When sending the request to the new entity, the UPF shall set a null SEID in the header of the PFCP request and include the CP F-SEID assigned by the previous SMF in the request.

    当向新实体发送请求时,UPF应在PFCP请求的头中设置一个空SEID,并在请求中包含前一个SMF分配的CP F-SEID。

    7)The UPF shall not trigger the restoration procedures specified in 3GPP TS 23.527 [40] for a PFCP session that can be controlled by different SMFs of an SMF set when a heartbeat failure is detected. Restoration procedures shall be triggered only if heartbeat procedures fail with all of the SMFs in the SMF set (i.e. the SMFs with which the UPF has established associations with the same SMF Set ID).

    7)当检测到心跳故障时,UPF不应触发可由SMF集的不同SMF控制的PFCP会话的恢复过程。只有当心跳过程在SMF集合中的所有SMF都失败时,才能触发恢复程序。

    8)If an SMF or UPF fails, the peer PFCP node that detects that error shall remove the PFCP association locally.

    8)如果SMF或UPF失败,则检测到该错误的对等PFCP节点应在本地移除PFCP关联。

    9)A UPF supporting the MPAS feature shall support F-TEID allocation and UE IP address/prefix allocation in the UP function (see clauses 5.5 and 5.21).

    9)支持MPAS特性的UPF应在UP功能中支持F-TEID分配和UE IP地址/前缀分配。

    展开全文
  • AMF、UPFSMF

    千次阅读 2021-01-12 14:00:23
    AMF,Access and Mobility Management Function,接入和移动性管理功能。 AMF是5GC的主要功能单元,完成终端用户的接入和移动性管理,相当于MME的一部分功能。...UPF (User Port Function) 用户端口功能

    AMF,Access and Mobility Management Function,接入和移动性管理功能。

    AMF是5GC的主要功能单元,完成终端用户的接入和移动性管理,相当于MME的一部分功能。
    
    AMF通过N2(NG-C)与基站gNB连接。
    

    SMF,Session Management Function,会话管理功能。

    SMF是5GC的重要功能单元,负责处理用户的业务,可以看成是MME承载管理部分以及SGW和PGW的控制面功能的组合。
    UPF (User Port Function) 用户端口功能。
    用户端口功能将特定的UNI要求适配到核心功能和系统管理功能。用户端口功能主要有:A/D转换;信令转换;UNI功能的终接;UNI的激活/去激活;UNI载荷通路/承载能力的处理;UNI的测试、维护、管理、控制功能。

    展开全文
  • 学习5G知识,势必要去阅读相关的技术标准,而纯英文的标准协议对于初学者来说是个门槛。 个人在学习5G标准3GPP TS 29244-g30过程...5.22.2 With one PFCP association per SMF Set and UPF每个SMF集和UPF具有一个PFC.

    学习5G知识,势必要去阅读相关的技术标准,而纯英文的标准协议对于初学者来说是个门槛。

    个人在学习5G标准3GPP TS 29244-g30过程中,也发现google的机器翻译实在晦涩难懂,所以个人在借助百度翻译(中国人更懂中文)的同时,人工对每句话进行了校对。

    在自己学习的同时,也将翻译内容分享给给广大网友。由于个人能力有限,翻译不到位的地方还请各位网友们指正。

    5.22.2 With one PFCP association per SMF Set and UPF 每个SMF集和UPF具有一个PFCP关联

    When a UPF supports that a PFCP session can be successively controlled by different SMF(s) in the same SMF set, the following applies:

    当UPF支持PFCP会话可由同一SMF集中的不同SMF连续控制时,以下适用:

    1)One SMF in the SMF set shall establish one single PFCP Association with the UPF for the SMF set; the Node ID in the PFCP Association Setup Request shall be set to an FQDN representing the SMF set.

    The SMF shall indicate that it supports the SSET feature in the CP Function Features IE (see clause 8.2.58); this indicates to the UPF that the PFCP sessions established with this PFCP association can be successively controlled by different SMFs of an SMF set according to the procedure defined in this clause.

    The SMF may also indicate the IP addresses of alternative SMFs within the SMF Set in the PFCP Association Setup Request.

    1)SMF集合中的一个SMF应与SMF集合的UPF建立一个PFCP偶联;PFCP Association Setup Request中的Node ID应设置为表示SMF集合的FQDN。SMF应表明其支持CP Function Features IE中的SSET特性;这向UPF表明,根据本条中定义的程序,使用该PFCP偶联建立的PFCP会话可以由SMF集的不同SMF连续控制。SMF还可以指示PFCP Association Setup Request中设置的SMF内的替代SMF的IP地址。

    2)When establishing a PFCP session, the SEID that the SMF assigns in the CP F-SEID of the PFCP Session Establishment Request may be unique or not within the SMF set. However the assigned CP F-SEID shall be unique within the SMF set.

    2)当建立PFCP会话时,SMF在PFCP Session Establishment Request的CP F-SEID中分配的SEID可以是唯一的或者不在SMF集合内。但是,指定的CP F-SEID在SMF集合中应是唯一的。

    NOTE 1: The UPF does not (need to) know whether the SEID in the CP F-SEID is uniquely assigned in the SMF set or not.

    注意1:UPF不(不需要)知道CP F-SEID中的SEID是否在SMF集中唯一分配。

    3)Any SMF in the SMF set may issue requests to modify or delete the PFCP session, or to update or release the PFCP association.

    3)SMF集合中的任何SMF都可以发出请求来修改或删除PFCP会话,或者更新或释放PFCP关联。

    4)The UPF shall initiate PFCP session related requests (e.g. PFCP Session Report Request) towards another PFCP entity pertaining to the same SMF or another SMF of the SMF Set, if the IP address included in the CP F-SEID assigned to the PFCP session is not responsive, or if the UPF receives a GTP-U Error Indication from the SMF over the N4-u tunnel assigned to the N4 session for data forwarding if any.

    The UPF shall use the IP addresses of alternative SMFs received during the PFCP association setup or update procedures, if any, or other PFCP entities pertaining to the same SMF. Otherwise the UPF shall use the SMF set FQDN in the CP Node ID to discover alternative SMFs within the SMF Set, e.g. by querying the DNS or by performing a discovery request towards the NRF.

    When sending the request to another PFCP entity pertaining to the same SMF or to the new SMF, the UPF shall set a null SEID in the header of the PFCP request and include the CP F-SEID assigned by the previous SMF in the request.

    4)如果分配给PFCP会话的CP F-SEID中包含的IP地址没有响应,或者如果UPF通过分配给N4会话的N4-u隧道接收到来自SMF的GTP-U Error Indication(如果有),则UPF应向与同一SMF或SMF集的另一SMF相关的另一PFCP实体发起与PFCP会话相关的请求。UPF应使用在PFCP关联建立或更新过程(如有)期间收到的备选SMF的IP地址,或与同一SMF有关的其他PFCP实体的IP地址。否则,UPF应使用CP Node ID中的SMF集FQDN来发现SMF Set中的替代SMF,例如通过查询DNS或通过向NRF执行发现请求。当向另一个PFCP实体发送与同一SMF或新SMF有关的请求时,UPF应在PFCP请求的头中设置一个空SEID,并在请求中包括由先前SMF分配的CP F-SEID。

    5)An SMF may redirect a UPF initiated PFCP session related request to another PFCP entity pertaining to the same SMF or to a different SMF in the SMF set by rejecting the request with the cause "Redirection Requested" and with the IP address of the new entity to contact. When sending the redirected request to the new entity, the UPF shall set a null SEID in the header of the PFCP request and include the CP F-SEID assigned by the previous SMF in the request.

    Alternatively, an SMF may forward the UPF request to another PFCP entity pertaining to the same SMF or to a new SMF in the SMF set; the new PFCP entity or the new SMF answers to the UPF, including the CP F-SEID IE with the IPv4 or IPv6 address of the new entity respectively and the same or a modified SEID, and optionally including the N4-u F-TEID that the UPF shall use for sending data towards the new entity.

    5)SMF可以将UPF发起的PFCP会话相关请求重定向到属于同一SMF的另一个PFCP实体或SMF集中的另一个SMF,方法是拒绝该请求,原因是“Redirection Requested”和要联系的新实体的IP地址。当向新实体发送重定向请求时,UPF应在PFCP请求的头中设置一个空SEID,并在请求中包含前一个SMF分配的CP F-SEID。或者,SMF可以将UPF请求转发给属于同一SMF或SMF集中的新SMF的另一PFCP实体;新PFCP实体或新SMF回答UPF,包括分别具有新实体的IPv4或IPv6地址的CP F-SEID IE和相同或修改的SEID,并且可选地包括UPF用于向新实体发送数据N4-u F-TEID。

    NOTE 2: This allows to address cases where a different SMF would have been reselected in the 5GC for the PFCP session, e.g. by an AMF.

    注2:这允许解决在5GC中为PFCP会话重新选择了不同的SMF的情况,例如:由AMF。

    6)An SMF may also update, at any time, a PFCP session by including the CP F-SEID with the IPv4 or IPv6 address of a new SMF and/or a new SEID assigned by the new SMF in a PFCP Session Modification Request.

    6)SMF还可以随时通过在PFCP Session Modification Request中包括具有新SMF的IPv4或IPv6地址的CP F-SEID和/或新SMF分配的新SEID来更新PFCP会话。

    7)The UPF shall not trigger the restoration procedures specified in 3GPP TS 23.527 [40] for a PFCP session that can be controlled by different SMFs of an SMF set when a heartbeat failure is detected for the IP address of the assigned CP F-SEID. Restoration procedures shall be triggered only if heartbeat procedures fail with all the IP addresses of all the SMFs in the SMF set.

    7)当为分配的CP F-SEID的IP地址检测到心跳故障时,UPF不应触发PFCP会话的恢复过程,该会话可由SMF集的不同SMF控制。只有心跳程序在SMF集合中所有SMF的所有IP地址都失败时,才能触发恢复程序。

    NOTE 3: The above requirements enable all SMFs of a same SMF set to successively control a given PFCP session without causing extra signalling over the N4 interface.

    注3:以上要求使同一SMF集的所有SMF能够连续控制给定的PFCP会话,而不会在N4接口上引起额外的信令。

    8)A UPF supporting the SSET feature shall support F-TEID allocation and UE IP address/prefix allocation in the UP function (see clauses 5.5 and 5.21).

    8)支持SSET特性的UPF应在UP功能中支持F-TEID分配和UE IP地址/前缀分配。

    展开全文
  • N4关联或PFCP关联 N4会话上下文 N4会话管理 N4会话上报
  • https://pmvt.cn/epc/5gc-%e7%bd%91%e5%85%83amf%e3%80%81smf%e3%80%81ausf%e3%80%81upf%e3%80%81pcf%e3%80%81udm%e3%80%81nrf%e3%80%81nssf%e3%80%81nef.html 1、AMF Access and Mobility Management Function,接...
  • 学习5G知识,势必要去阅读相关的技术标准,而纯英文的标准协议对于初学者来说是个门槛。 个人在学习5G标准3GPP TS 29244-g30过程中,也...5.26.4 Reporting clock drift between TSN and 5GS times from UPF to SMF
  • SMF crash

    2020-12-27 01:01:53
    <p>Running MME/HSS/PCRF/SMF/NRF on one server, SGW/UPF on another, so SMF/UPF is acting as a PGW here. <pre><code> git log -1 commit 300123d99085b7e6b64f2b34ebf89154cd082cc1 (HEAD -> master, origin...
  • UPF GTP packets failed

    2020-12-04 16:42:34
    <div><p>GtpHandler() This type[255] ...<p><a href="https://github.com/free5gc/free5gc/files/4728973/config_smf_upf.zip">config_smf_upf.zip</a></p><p>该提问来源于开源项目:free5gc/free5gc</p></div>
  • UPF(User Plane Function,用户面功能): ts 29.24423.501[5.8]SMF 执行选择 UPF,选择的具体细节在 TS 23.501 的 6.3.3 章节UPF 流量检测能力可以被 SMF 用来控制,如下功能列表:流量检测(按照流量 IP 类型,...
  • 内容提要:1)5G核心网作为调度中心,主要负责对数据进行分拣和分发,由AMF、UPFSMF、AUSF、NSSF、NEF、NRF等单元组成;2)5G的用户面单元UPF更加灵活,可以联合MEC,向用户侧下沉,提供超大带宽、超低时延、实时性...
  • NR 5G 网络功能之UPF

    万次阅读 2019-07-16 18:18:13
    UPF简述 用户平面功能(UPF)包括以下功能。 在 UPF 的单个实例中可以支持部分或全部 UPF 功能: 用于 RAT 内/ RAT 间移动性的锚点...数据包检查(例如,基于服务数据流模板的应用流程检测以及从 SMF 接收的可选 ...
  • [5GC] UPF用户面功能

    2021-03-26 11:20:07
    移动性管理 IP地址分配 F-TEID分配和释放 支持多SMF控制UPF 支持ULCL和分支点功能 I-UPF功能要求 隧道管理 ‘End marker’功能 策略执行功能 计费功能 数据转发及路由 用户面数据转发 数据缓存
  • Isolating open5gs UPF

    2020-12-26 08:56:32
    m curious to see how feasible it would be to have only the open5gs UPF talking to simulated gNB, and SMF. Has this been done and are there any configuration notes I could leverage? </p><p>该提问来源于...
  • Meaning I am simulating gNB, AMF and SMF. The PFCP Association setup seems to be working fine but the PFCP Session establishment keeps failing with "Session Context not found". Browsing ...
  • 每天学点5G-5G UPF

    2021-02-14 15:10:22
    -响应SMF请求分配UE IP地址/前缀(如果支持的话)。 -与外部数据网络互联的PDU会话点。 -分组路由和转发(例如,基于UL上行链路分类器支持将业务流路由到数据网络实例,基于BP分支点支持多宿主PDU会话,支持5G VN组...
  • 1. PFCP Association PFCP 关联... 1.1 由 SMFUPF 发起 PFCP 关联请求 根据所有配置文件定义的 UPF 发起 PFCP 关联请求,SMF PFCP 服务端端口 8805 for _, upf := range context.SMF_Self().UserPlaneInfor...
  • NR 5G 网络功能之SMF

    万次阅读 2019-07-16 18:06:23
    会话管理,例如会话建立,修改和释放,包括 UPF 和 AN 节点之间的通道维护。 UE IP 地址分配和管理(包括可选的授权)。 DHCPv4(服务器和客户端)和 DHCPv6(服务器和客户端)功能。 如 IETF RFC 1027 [53]中...
  • 每天学点5G-5G SMF

    2021-02-12 23:01:09
    SMF的单个实例中可以支持部分或全部SMF功能: -会话管理:例如会话建立、修改和发布,包括UPF和节点之间的隧道维护。 -UE IP地址分配和管理(包括可选授权):可以从UPF或从外部数据网络接收UE IP地址。 -DHCPv4...
  • [5GC]SMF会话管理功能

    2021-02-20 13:28:37
    维护UPF和RAN之间的隧道 选择和控制UPF(ARP/ND) 配置UPF流量导向 收集UPF计费数据 会话的SCC模式选择 I-SMF IMS P-CSCF发现 Policy相关功能。。。 具体功能解释 会话管理 PDU会话的属性 S-NSSAI和DNN 网络切片...
  • 5G NGC — SMF 会话管理功能

    千次阅读 2021-02-24 23:12:31
    目录 文章目录目录SMF ...SSC 模式、配置 UPF 的 QoS 策略等。抽取了 4G EPC 中分散在 MME、SGW-C、PGW-C 提供的会话管理功能。 服务化功能:服务注册、更新和去注册,服务订阅,NRF 主备切换、心跳功能。 移动
  • <p>I have an <code>smf.yaml</code> with x1 UPF listed <pre><code> upf: pfcp: - addr: 10.10.0.7 # N4 cloudUPF_1 </code></pre> <ul><li><code>cloudUPF_1</code> is PFCP associated, however so is another...
  • 什么是5G会话管理功能(SMF

    万次阅读 2019-08-01 16:26:17
    SMF主要负责与分离的数据面交互,创建、更新和删除PDU会话,并管理与UPF的会话环境(session context)。 UE和gNB采用NGAP(Next Generation Application Protocol)协议传递NAS(Non Access Stratum)消息,经由...
  • INFO[2020-09-18T06:04:14Z]/go/src/free5gc/src/smf/service/init.go:169 free5gc/src/smf/service.(*SMF).Start() Send PFCP Association Request to UPF[117.112.102.98:8805] SMF=app INFO[2020-09-18T06:04...
  • s - 1 Branching UPF and 2 Anchoring UPF's. Please refer to the diagram attached for the setup. I see the ULCL not working correctly. Need your help on identifying any issues with the configuration...
  • 5G NGC — 开放的 N4 接口

    千次阅读 2021-02-14 12:38:44
    N4 Session 管理流程用于控制 UPF 的功能,SMF 可以在 UPF 中创建、更新、删除 N4 Session 的 Context(上下文)。 N4 Session Context 由 N4 Session ID 标识,分别由 SMFUPF 生成 N4 Session Context 以存
  • 5G PDU会话管理简介(三)

    千次阅读 2020-07-07 21:13:06
    PDU会话建立时,SMF会参考很多因素选择UPF,比如:UPF支持的DN列表、UPF的服务范围(tac列表)、UPF支持的SSC模式、UPF负载、UE当前位置等等。选择的策略可能不是一成不变的,而各个厂家的具体实现也都不一样。 ...
  • 上一篇博文主要是介绍了“非漫游单PDU Session连接场景”下的5G系统架构模型,本文主要介绍“非漫游多PDU Session连接场景”下的5G系统架构模型,其又可以分为两种类型:1)一个SMF多个UPF,2)多个SMF多个UPF ...
  • 23726-g00.docx

    2020-07-06 11:17:36
    23726协议下载,I-SMF使用场景及流程介绍,详细说明在哪些场景下需要进行I-SMF,及I-UPF的插入
  • 5G PDU会话管理简介(二)

    千次阅读 2020-07-06 22:56:22
    SMF精心管控着PDU会话,SMF与AMF、PCF和UPF的联系最为基本。 1、AMF与SMF的关联 SM Context AMF是UE唯一的移动锚点,UE的会话管理相关信令必经AMF透传给SMF。 会话建立时,AMF通过调用SMF提供的服务接口在SMF上...

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