30 Flexible Mobile Service Steering
22.1013GPPRelease 17Service aspectsService principlesTS
30.1 Introduction
In order to realize efficient and flexible mobile service steering in (S)Gi-LAN, the network operator uses information (e.g. user profile, network operator’s policies, RAT type, application characteristics) to define traffic steering policies. These policies are used to steer the subscriber’s traffic to appropriate enablers (e.g. NAT, antimalware, parental control, DDoS protection) in the (S)Gi-LAN.
The term (S)Gi-LAN used in the present document represents a system which is out of 3GPP scope.
30.2 General Requirements
The following requirements apply:
– The 3GPP Core Network shall be able to define and modify traffic steering policies that are used to steer traffic in (S)Gi-LAN containing operator or 3rd party service functions e.g. to improve e.g. the user’s QoE, apply the bandwidth limitation and provide valued added services.
– Traffic steering policy shall be able to distinguish between upstream and downstream traffic.
– The 3GPP Core Network shall be able to define different traffic steering policies for a user’s traffic on a per session basis (e.g. for applying parental control, anti-malware, DDoS protection, video optimization).
– The 3GPP Core Network defines traffic steering policies based on one or more pieces of information such as:
– network operator’s policies
– user subscription (e.g. user’s priority, the status of optional subscriber services from the subscription data, based on service provider used, subscribed QoS)
– user’s current RAT
– the network (RAN and CN) load status
– application characteristics such as: application type (video, web browsing, IM, etc), application protocol ( HTTP, P2P, etc), target address name (URL) and application provider (My tube, etc)
– time
– UE location
– information (e.g. APN) of the destination network (i.e. a PDN or an internal IP network) of traffic flow
– In case of roaming, the HPLMN shall be able to apply traffic steering policies for home routed traffic.
Note: Traffic steering policies for local breakout is not specified.