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NEXT GENERATION MOBILE CORE: POLICY BASED "REAL TIME TRAFFIC STEERING" WITH WLAN SYSTEMS

IP.com Disclosure Number: IPCOM000250393D
Publication Date: 2017-Jul-10

Publishing Venue

The IP.com Prior Art Database

Related People

Indermeet Gandhi: AUTHOR [+2]

Abstract

Dynamic traffic steering methods for Long Term Evolution (LTE) - Wireless Local Area Network (WLANs) are provided. In one such method, the chances of a client staying in the WLAN is improved. In another method, various performance indicators are provided to a controller, analytics are performed on the indicators and improved performance for a client via LTE or WLAN network can be achieved. In still other method, analytics are performed at the controller to achieve a client /application distribution that helps to improve efficiency of the overall LTE-WLAN network while at the same time, improving (or maintaining) per-client experience. Using policies defined at a Traffic Steering Controller, a client and its applications can be dynamically steered to the best possible networks and improve overall network efficiency.

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Copyright 2017 Cisco Systems, Inc. 1

NEXT GENERATION MOBILE CORE: POLICY BASED "REAL TIME TRAFFIC STEERING" WITH WLAN SYSTEMS

AUTHORS: Indermeet Gandhi

Mukesh Taneja

CISCO SYSTEMS, INC.

ABSTRACT

Dynamic traffic steering methods for Long Term Evolution (LTE) - Wireless Local

Area Network (WLANs) are provided. In one such method, the chances of a client staying

in the WLAN is improved. In another method, various performance indicators are provided

to a controller, analytics are performed on the indicators and improved performance for a

client via LTE or WLAN network can be achieved. In still other method, analytics are

performed at the controller to achieve a client /application distribution that helps to improve

efficiency of the overall LTE-WLAN network while at the same time, improving (or

maintaining) per-client experience. Using policies defined at a Traffic Steering Controller,

a client and its applications can be dynamically steered to the best possible networks and

improve overall network efficiency.

DETAILED DESCRIPTION

Traffic Steering aims to direct a User Equipment (UE) accessing a Wi-Fi® wireless

local area network (WLAN) to the best network, whether that is Wi-Fi WLAN, Long Term

Evolution (LTE) network, Wideband Code Division Multiple Access (WCDMA) network

or General System for Mobile Communication (GSM) network. Real-time traffic should

make this dynamic based on network policies.

Presented herein is a solution that addresses the "Wi-Fi Bad Habit" scenario, i.e.,

conventional "WLAN preferred if in coverage" scheme, implemented by most current UE

devices. Here, a UE device always connects to a WLAN access point (AP) if a minimum

UE-specific signal quality threshold is satisfied. This is depicted in FIG. 1 below.

Copyright 2017 Cisco Systems, Inc. 2

FIG. 1

More efficient ways for allocating applications / clients to a LTE network or a

WLAN are presented herein, so as to improve chances of applications staying on a WLAN

(or LTE) network and/or to implement some other policy based decisions.

This proposal introduces a "Real Time Traffic Steering Controller" Function in

the Operator Core Network. This could be part of a Load Balancing Node or as part of

enhanced Authentication Authorization and Accounting (AAA) proxy or Application

Policy Infrastructure Controller Enterprise Module (APIC-EM).

FIG. 2

Copyright 2017 Cisco Systems, Inc. 3

FIG. 2 above shows a Traffic Steering Controller (TSC) receiving estimated

throughput from the WLAN as described in IEEE 802.11-14/1246r7 - Mentor. The

throughput can be passed from the WLAN infrastructure to the TSC (acting as AAA proxy)

in Radius VSA at initial access, regular intervals or when throughput level falls below

threshold level when in associated state.

Similarly, the TSC receives estimated throughput from the LTE network based on

the cell at which the UE is attached to.

The following methods are provided to dynamically steer the client to the best

available network with the goals to impro...