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ID:46579053
大小:1.34 MB
页数:151页
时间:2019-11-25
《5G QoS 学习笔记》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、陈yy的自学笔记5GQos学习笔记(一)Qosmapping的流程1.信令流程1)SMF从PCF/PCC等网元获取Qos信息;2)UE或者AN发起PDUsessionmodification过程,AMF转发给SMF;3)SMF对AMF响应Nsmf_PDUSession_UpdateSMContext消息,这个消息中包含:N2SMinformation(PDUsessionid,QFI,Qosprofile,SessionAMBR)N1SMcontainer(PDUsessionid,Qosrule,QosflowlevelQosparameter,sess
2、ionAMBR)4)AMF收到后,将N2SMinformation发给AN节点;5)SISMcontainer中会有一个PDUSessionModificationCommand,指示给AMF是否要将这个container内容发给UE。陈yy的自学笔记5GQosUERANAMFSMFUPFUDMPCF1a.PDUSessionModificationRequest1a.Nsmf_PDUSession_UpdateSMContextRequest1b.PCFinitiatedSMPolicyAssociationModification1c.Nudm_SDM
3、_Notification1d.QoSUpdateTrigger1e.N2message(PDUsessionID,SMinformation)1e.Nsmf_PDUSession_UpdateSMContextRequest2.SMFinitiatedSMPolicyAssociationModification2a.N4SessionModificationRequest2b.N4SessionModificationResponse3a.Nsmf_PDUSession_UpdateSMContextResponse3b.Namf_Communicat
4、ion_N1N2MessageTransfer3c.Nsmf_PDUSession_SMContextStatusNotify4.N2SessionRequest5.AN-specificresourcemodification(includingPDUSessionModificationCommand/Ack)6.N2SessionResponse7a.Nsmf_PDUSession_UpdateSMContextRequest7b.Nsmf_PDUSession_UpdateSMContextResponse8a.N4SessionModificat
5、ionRequest9.PDUSessionModificationCommandAck8b.N4SessionModificationResponse10.N2NASuplinktransfer11a.Nsmf_PDUSession_UpdateSMContextRequest11b.Nsmf_PDUSession_UpdateSMContextResponse12a.N4SessionModificationRequest12b.N4SessionModificationResponse13.SMFinitiatedSMPolicyAssociatio
6、nModification2.RAN获知Qosprofile:SMF向RAN提供Qosprofile等内容从而实现QosFlowmaping,RAN使用这个Qosprofile进行空口资源的适配,SMF发给RAN的内容含有:QFIQosprofile可选的,对上行业务给出传输级别的报文标签值(从N3tunnel外部IP头提取的DSCP值)陈yy的自学笔记5GQos消息与接口:SMF->AMF->RANN2Sessionmanagement消息,见235024.3.3,SMF将Qosprofile和QFI带给RAN3.UE获得Qosrule/param
7、eter的方法1)信令显式配置,告知UE关于Qosflow到DRBmapping规则SMF以NAS信令的方式向UE提供以下内容。EachsignalledQoSrulecontains:a)anindicationofwhethertheQoSruleisthedefaultQoSrule;b)aQoSruleidentifier(QRI);c)aQoSflowidentifier(QFI);d)optionally,asetofpacketfilters;ande)aprecedencevalue.NOTE:ThedefaultQoSruleindica
8、tion(DQR)ofasignalledQoSrulecanno
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