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Data Session Setup
3AgendaInitial AttachDefault EPS Bearer SetupS1 ReleaseQoS Management
4Initial Attach ProceduresSPRUE ID AcquisitionAuthenticationEPS Session EstablishmentNAS Security SetupLocation UpdateHSS
5IMSI AcquisitionRRC ConnectionRRC ConnectedRRC ConnectedRRC Connection RequestRRC Connection SetupAttach RequestRRC Connection Setup CompleteInitial UE MessageS1 Signaling ConnectionECM ConnectionECM-ConnectedECM-ConnectedEMM-ConnectedEMM-ConnectedMME Acquire IMSI
6AuthenticationProcedure for Authentication
7NAS Security SetupProcedure for NAS Security Setup
8Location UpdateProcedure for Location Update
9EPS Session EstablishmentSPRHSSAssign EPS Bearer IDP-GW selection by HSS or MMECreate Session RequestCreate Session RequestCreate S5 TEID(DL) Receive S5 TEID(DL) UE IP Address AllocationIndication of IP-CAN Session establishment (CCR)Profile RequestProfile ResponsePolicy DecisionAck of IP-CAN Session establishment (CCA)Create Session ResponseSS P-GW TEID will be used for TAU in case of S-GW relocationCreate Session ResponseMME Shall Set the UE AMBR to the sum of APN-AMBR of all active APNs upto the value of the Subscribed UE AMBRCreate S1 TEID(UL) Receive S5 TEID(DL) Create S5 TEID(UL)
10SPRHSSMME Generates Various ParametersAttach AcceptInitial Context Setup RequestReceive S1 TEID(UL) eNB generates AS KeysSecurity Mode CommandUE generates AS KeysSecurity Mode CommandCiphering and Integrity Setup Complete for RRC Message and Bearer RRC Connection ReconfigurationReceive DRB ID Create DRB ID Initial Context Setup responseAttach CompleteModify Bearer RequestModify Bearer ResponseEPS Session Establishment
11SAE Bearer QoS Awareness•One of the major requirements for EUTRAN and EPC to fulfill is that every SAE bearer must be QoS aware.•All data transmitted within a SAE bearer will get the same QoS handling (scheduling, prioritization, discarding probability, etc.). •Different applications (for example take a packet video streaming service and a ftp download) have different QoS setting and cannot share the same SAE bearer.•Other applications with similar traffic characteristics will be able to be placed inside the same SAE bearer provided that the bandwidth of the bearer is scaled accordingly .•Due to this fact, the standard will allow a UE to have several SAE bearers, each one with a different QoS setting.
12There are two types of Bearer, i.e. Dedicated bearer and Default bearer. There is at-least one default bearer established when UE is attached to LTE network while dedicated bearer is always established when there is need to provide QoS to specific service (like VoIP, video etc).
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- Winter '16
- IP address, Dedicated Bearer