distributed policy control_a guide to next generation services

8/4/2019 Distributed Policy Control_A Guide to Next Generation Services

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Monitor. Protect. Deliver.

A guide to cost-effectivenext generation services.

www.gosnetworks.com

August 2011



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visibility and control to the client device

August 2011

Introduction...................................................................................................... 2

Real-Time Multimedia ....................................................................................... 3

Challenge ...................................................................................................... 3

Solution......................................................................................................... 3

Benets ......................................................................................................... 3

Examples ...................................................................................................... 3

Connectivity Aggregation and Ofoad............................................................... 5

Challenge ...................................................................................................... 5 Solution......................................................................................................... 5

Benets ......................................................................................................... 5

Examples ...................................................................................................... 5

Customer Service Support ............................................................................... 7

Challenge ...................................................................................................... 7

Solution......................................................................................................... 7

Benets ......................................................................................................... 7

Examples ...................................................................................................... 8

VoLTE............................................................................................................... 9

Challenge ...................................................................................................... 9 Solution......................................................................................................... 9

Benets ......................................................................................................... 9

Examples .................................................................................................... 10

Policy 2.0: Application-Centric Policies ........................................................... 11

Challenge .................................................................................................... 11

Solution....................................................................................................... 11

Benets ....................................................................................................... 11

Examples .................................................................................................... 12

Cloud Services ............................................................................................... 13

Challenge .................................................................................................... 13 Solution....................................................................................................... 13

Benets ....................................................................................................... 13

Examples .................................................................................................... 14

M2M ............................................................................................................... 15

Challenge .................................................................................................... 15

Solution....................................................................................................... 15

Benets ....................................................................................................... 15

Examples .................................................................................................... 15

Glossary ......................................................................................................... 17

Contents



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August 2011

Introduction

Network operators ace an unprecedented demand or next generation services

while continued growth in data trac threatens to overwhelm their networks.

With this surge in demand comes a complex set o challenges that network

operators have to ace.

• Howtoguaranteethedeliveryofhighvalueserviceswhileatthesametime

using their inrastructure eciently?

• Howtoprotectrevenue-generatingservicesfromthenonrevenue-generating

trac that congests the network and competes or resources?

• Howtoevolvesophisticatedpricingandpersonalisationplansthatmeetthe

demands o a new generation o users?

• How tomeasureandmonitor theactual user experience in away that

supports customer care activities?

Traditional approaches don’t meet these challenges. Cost conscious operators

can’t build themselves out o the problem and standard DPI or policy products

don’t provide the level o visibility and control required to truly manage the network

rom end-to-end.

The solution is to go beyond the traditional network boundary and take control at

the client device, to see and manage trac beore it reaches the network.

GoS 360° is a unique solution that consists o an embeddable GoS Agent

sotware client in the device and a centrally deployed GoS Manager. The GoS

360° solution can be used to ensure trac is identied, prioritised and controlled

at client devices, ensuring ull visibility o user experience, service optimisation

and the most ecient use o bandwidth.

This paper describes a number o use cases in which deployment o GoS 360°

can uniquely solve data problems or network operators.

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August 2011

Real-Time Multimedia

Challenge

Delivering real-time multimedia is complex and demanding. Users expect fexibility

and speed as they access a range o services, switching dynamically rom audio

to video and back again, inviting other parties to join a session, sharing downloads

and streaming their own content to other users. These sessions present signicant

perormance and service optimisation challenges or network operators.

Network operators have to manage real-time multimedia eciently to ensure

consistent quality o experience or their customers. They need the ability to

prioritise revenue-generating or preerred services against competing services

rom OTT providers and other vendors.

Solution

The solution is to deploy GoS Agent on client devices and GoS Manager in the

network core, optionally connected to the PCRF (see Figure 1). The combination

o GoS Agent and GoS Manager gives network operators both visibility and

control o all trac, right down to the end user device. GoS 360° is the only way

to ensure the consistent, reliable end-to-end prioritisation and dynamic allocation

o resources demanded by real-time multi media.

Benefts

With the unique combination o GoS Agent and GoS Manager, network operators

secure:

• Real-timevisibilityofcustomerexperienceanddemand

• OptimisedQoSformultiple,real-timeservices

• Efcientbandwidthutilisation

• Theabilitytoidentify,protectandprioritisepreferredusertrafc

• Reducedcoststhroughefcientnetworkoptimisationandmanagement

• Revenuegenerationwithassured,stickyservices

GoS delivers the only means to ully control upstream, user-generated trac.

Examples

• RichCommunicationsSuite(RCS)

• Mobilebroadbandaccessviadongles

• Gaming

• Videoconferencing

• On-demandIPTVservices

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August 2011

Real-Time Multimedia

Figure 1 GoS 360° in Real-Time Multimedia Applications.

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August 2011

Connectivity Aggregation and Ofoad

ChallengeMany operators are attempting to manage the ofoad o trac rom mobilenetworkstoWiFiconnections,dependingontheoptimumpathavailable.However,switching trac between WiFi and mobile networks makes it dicult to maintainconsistentQoSlevelsforcriticalapplications.

In order to be able to oer this as a service, MNOs need to be able to intelligentlymanage this process in real-time to ensure there is no serious degradation o

application perormance during handover or when sessions are active.

Solution The solution is to deploy GoS Agent in conjunction with a dedicated connection

manager that selects the optimal WAN in real-time (see Figure 2). With GoSManager in the core network, decisions can be made regarding the prioritizationo trac on each connection or all subscribers to the service. GoS Managercan optionally be connected to the PCRF or integration with the overall policyramework.

BeneftsWith the combination o connectivity managers enabled with GoS Agent andGoS Manager, MNOs can: • SwitchtrafcbetweenWiFiand3G/LTEnetworksseamlessly,without

user intervention • Applymultiplepoliciesinreal-timebasedontheavailableWAN

connections • Optimiseuseoftheavailablebandwidth • Prioritiserevenuegeneratingtrafc • Improvecustomersatisfactionandretentionbyintegratinguser preferencesintoQoSpolicies • Reducecoststhroughefcientnetworkoptimisationandmanagement • Generaterevenuewithassured,stickyservicesGoS 360° is the only way in which upstream trac can be controlled or ecientdata ofoad and optimisation rom client devices over multiple interaces.

Examples • Mobilebroadbandaccessviadongles • Embeddedcommunicationsclients

• Femtocells

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August 2011

Connectivity Aggregation and Ofoad

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Figure 2 GoS 360° in Connectivity Aggregation and Ofoad Applications.



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August 2011

Customer Service Support

Challenge

Customer support relies on accurate inormation yet most network operators

have only a very incomplete picture o customer problems. Current network

monitoring solutions cannot routinely access client devices or monitor the

perormance o individual applications in the subscriber domain. They cannot

look beyond the CPE or network demarcation point to “see” the problem that the

customer experiences, either in real-time or historically. Without this data, network

operators cannot eciently solve customer problems that originate beyond their

network boundary.

This can signicantly increase the time taken to resolve individual subscriber

issues and lead to unnecessary costs.

Solution

By installing GoS Agent on client devices, such as mobile handsets, broadband

dongles and CPE gateways, customer support teams can view data on application

perormance, bandwidth problems and LAN-side issues (see Figure 3). Each

instance o the GoS Agent interacts with a centrally deployed GoS Manager,

accessible to customer support agents, presenting them with the inormationrequired to solve customer problems quickly and eciently, saving time and

money.

Benefts

The combination o GoS Agents and GoS Manager provides customer support

teams with:

• Accesstoreal-timeandhistoricvisibilityoftrafcarrivingfromtheLAN

andgoingto/fromtheWAN

• Theabilitytoremotelyidentifyandresolveroot-causesofcustomerissues

on the LAN • Themeanstomeasureactuallinkperformanceandthroughput,not

network estimates

• Theabilitytoshortencustomersupportcalldurationandreducecosts

• Improvedcustomersatisfaction,reducingchurn

• Increasednetreferralsandcustomeradvocacy

• Reducedcoststhroughefcientnetworkoptimisationandmanagement

• Revenuegenerationwithassured,stickyservices

GoS 360° is the only way to obtain the complete visibility o LAN devices

required or 360° customer service assurance.

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August 2011

Customer Service Support

Figure 3 GoS 360° in Customer Service Support Applications.

Examples

• FixedlinebroadbandservicessuchasIPTV

• Measurementofstreamingvideouserexperience

• Businessservices

• Mobilebroadbandperformance

• Applicationspecicmanagementandsupport

• Gaming

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August 2011

VoLTE

Challenge

In the all-IP LTE network or 4th generation mobile, voice sessions compete or

bandwidth with other services. Unlike in earlier generations o mobile networks,

voice calls are not isolated on specic circuits. This presents a challenge or

mobile network operators (MNOs), as voice calls still present a signicant source

o revenue and there are oten clear regulatory guidelines mandating on-going

support or voice services. Currently, Circuit Switched Fallback (CSFB) has been

proposedforVoLTEsessions.However,thispresentsfurtherchallengesas,in

reverting to a 3G or 2G network connection, the data path also alls back to a

narrower bandwidth connection, leading to service degradation or the user and

risking an increase in customer dissatisaction.

Thelatest releasesof the3GPPstandards includeQoSfacilities forVoIPand

other services; however this is o no help to operators deploying LTE today based

on earlier releases.

MNOs need to ensure constant service availability and consistent quality or

voice sessions. They need to oer service assurance to connected devices and

handsets, particularly or premium or enterprise customers. Failure to do so mayresult in regulatory penalties and increase the likelihood o incurring costs through

ailure to support SLAs.

Solution

MNOs can deploy GoS Agent in handset devices and GoS Manager in the network.

The combination allows real-time services, including voice, to be prioritised

(see Figure 4). This means that voice services can be guaranteed in the ace

o competition rom other services. MNOs can protect both core revenues and

ensure perormance o a undamental part o their service oer. By deploying GoS

Agent and GoS Manager, MNOs can avoid having to adopt CSFB. Alternatively, i CSFB is deployed, GoS can also be used to manage critical data services on the

reduced bandwidth connection available once CSFB is activated.

Benefts

Deploying GoS Agents and GoS Manager enables MNOs to:

• Guaranteereal-timevoiceandvideoservices

• AvoidCSFBandensurenoservicedegradationforcustomers

• ProtectcriticaldataserviceswhereCSFBisselected

• Throttlebackothercompetingservices

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August 2011

VoLTE

Figure 4 GoS 360° in VoLTE.

Benefts continued

• MaximisereturnsfromSLAs

• ReduceriskofSLApenalties

• Reducecoststhroughefcientnetworkoptimisationandmanagement

• Generaterevenuewithassured,stickyservices

Examples

• VoiceandvideoinLTE • VoiceforIMS-enabledcorenetworks

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August 2011

Policy 2.0: Application-Centric Policies

Challenge

Policy servers are a key instrument or network operators. Policies enable them to

control access to services, to regulate the service experience, and to ensure that

the correct charging rules are applied. Eective policy rameworks also create

new opportunities to exploit emerging “two-sided” business models. Policy will

move rom being essentially a deensive tool to a business asset.

Under this model, Policy 2.0 will oster innovation as network operators provide

access to policy rameworks to third parties who are willing to pay or service

guarantees or their own customers. Current solutions do not extend to client

devices, where services and applications are actually consumed by users, and

this poses a challenge. Without access to client devices, network operators

cannot monitor data and application consumption, or control sessions to ensure

optimal experience. They cannot guarantee to deliver the policy they seek to

enorce, either internally or to external customers.

Solution

The solution is to deploy GoS Agent on client devices and GoS Manager in the

network core, connected to the PCRF, typically via the Gx interace (see Figure 5).

The combination o GoS Agent and GoS Manager gives network operators both

visibility AND control o all trac, right down to the end user device. This enables

network operators to monitor and enorce policies eectively or their own services

and as a service to third parties.

Benefts

By deploying GoS Agent and GoS Manager to complement and extend the policy

ramework, network operators are able to:

• Createdifferentiatedpoliciesthatcanbeenforcedinclientdevices

• Identify,protectandprioritisepreferredusertrafc

• Controlupstream,usergeneratedtrafc,ensuringrevenue-generating

applications perorm as expected

• Innovatenewserviceoffersbasedonvisibilityandcontrolofusertrafc

• DeliverservicestospecicdevicesonthecustomerLAN

• Ensureembeddedapplicationsperformasexpected



GoS 360° provides the only means by which dynamic policy decisions can be

made and enorced at client devices.

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August 2011

Policy 2.0: Application-Centric Policies

Figure 5 GoS 360° in Policy 2.0 Applications.

Examples

• Video/VoIPclientsinmobileportalsforsocialnetworking

• Applicationidentication

• IPTVdeliverytoSet-Top-Box

• Gaming

• Deviceidenticationanddiscovery

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August 2011

Cloud Services

Challenge

The momentum behind cloud services is continuing to build. But as more and more

services are delivered rom the cloud, the challenge o delivering a consistent user

experience across multiple devices has grown. Subscribers to cloud services

expect them to perorm consistently in xed and mobile domains and will quickly

churn rom services that don’t meet these expectations.

Subscription services will be supported by SLAs, which need to be monitored

and enorced by providers. Many applications have low latency characteristics

and real-time services will increasingly be delivered rom the cloud. These will

compete or the same bandwidth and resources as non real-time services.

To deliver successul, protable cloud services, network operators must be

able to ensure SLA requirements are met and that they can meet demanding

perormance criteria or more complex or real-time services.

Solution

Network operators can ensure secure, reliable delivery o complex cloud-based

services by deploying GoS Agent at client premises and GoS Manager in the

network (see Figure 6). GoS Manager acts as a perormance monitor or all

connected GoS Agents, ensuring accurate, real-time inormation o application

perormance to client devices is available. Network operators can respond to the

data by controlling individual sessions via the embedded GoS Agents.

Benefts

By deploying GoS 360° Agents and Manager, network operators can:

• Introduceserviceassuranceforsubscribers

• Offermanaged,securedserviceperformanceforOTTcloudnetwork

operators

• Monitorandcontrolupstreamtrafc

• Enableconsistentperformanceofcloudserviceacrossmultipledevices



GoS 360° is the only solution that delivers a consistent, predictable user o

cloud services experience across multiple devices.

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August 2011

Cloud Services

Figure 6 GoS 360° or Cloud Services.

Examples

• HostedVoIP

• Hostedcollaborationandsharing

• HostedCRM

• Cloud-basedvideoandaudioconferencing

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August 2011

M2M

Challenge

M2M communications generate signicant volumes o data trac. This is

expected to grow dramatically in the coming years. Much o this data is non-

critical and not real-time, but, amongst this, there is also data that does have real-

time requirements. Network operators need to be able to aggregate M2M trac

and prioritise that which is real-time. M2M trac also needs to be protected rom

other data streams on shared links.

This problem is compounded in areas o variable mobile coverage. Real-time

M2M data rom mobile sources must also be secured and protected against

contention with other data streams, particularly when there are constraints on

bandwidth or variable transmission quality.

Solution

The solution is to deploy GoS Agent in M2M gateways, to perorm prioritisation

o trac beore it is transmitted to the network (see Figure 7). With GoS Manager

installed in the network, each in-service gateway can be managed individually to

ensure consistent, reliable transmission o real-time M2M data streams.

Benefts

Enhancing M2M gateways with GoS Agent and deploying GoS Manager enables

network operators to:

• Protectrevenuegeneratingservices

• Reduceserviceassurancecosts

• Increaseserviceprotability

• RunM2Mservicesacrosssharedlinkswithguaranteedquality



GoS 360° provides the only way in which network operators can accurately

prioritise real-time M2M trac at source, beore it traverses the network.

Examples

• In-vehicleservices

• Alarms,securityandsurveillance

• Remotevideomonitoring

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August 2011

M2M

Figure 7 GoS 360° in M2M Gateways.

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August 2011

Glossary

2G Second Generation Mobile Radio Technology, e.g. GSM

3G Third Generation Mobile Radio Technology, e.g. UMTS

CPE Customer Premise Equipment

CSFB Circuit Switched Fallback

DSLAM Digital Subscriber Line Access Multiplexer

GGSN Gateway GPRS Support Node

GPRS General Packet Radio Service

GSM Global System or Mobile Communications, ormerly Groupe Spécial

Mobile

IMS IP Multi Media Subsystem

IP Internet Protocol

LTE Long Term Evolution

M2M Machine to Machine

MNO Mobile Network Operator

OTT Over the Top

PCRF Policy and Charging Rules Function

PGW Packet Data Network Gateway

QoS QualityofService

SGW Serving GatewaySLA Service Level Agreement

UMTS Universal Mobile Telecommunications System

VoLTE Voice over LTE

WiFi AP WiFi Access Point

distributed policy control_a guide to next generation services

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