BelAir SmallCell WP

White Paper

Improve Metropolitan Coverage, Capacity and Subscriber Services with BelAir Networks - Carrier Tested and Verified with over 140,000 Access Points Deployed

The wireless data industry is experiencing a tremendous amount of growth driven by the following key market influences:

• Smartphones and tablets with cellular/Wi-Fi connectivity

• Extensive application ecosystems for smart mobile devices

• The surge of video enabled internet applications• HD video moving into the mainstream• The emerging “always on” broadband wireless user culture

Mobile service providers continue to offer increasingly innovative and cost competitive wireless data services to capture the demanding smartphone and tablet user markets. The increasing popularity of video enabled applications like Netflix, Apple FaceTime, and Facebook’s Video Chat (Skype), plus streaming and downloading of music/video content will continue to drive users’ desire for lower cost wireless data consumption. One Gbyte of broadband data usage averages $10 in North America and Europe, with continued downward price pressure. Mobile service providers must look to alternate wireless broadband solutions to maintain competitive and profitable mobile broadband service offerings. Carrier Wi-Fi solutions offer broadband data services at a small fraction of the cost of 3G/ LTE macro solutions, enabling a new low cost dimension of mobile broadband data services.

Apple, Android and RIM have created significant application ecosystems to drive smartphone and tablet sales, which in turn drives more wireless data usage. The iPhone has created a huge surge in wireless data traffic since its introduction. The next significant surge in data traffic will result from the introduction of tablets and new smartphones by numerous suppliers. Smartphones data usage are now at par with laptop usage just 2-3 years ago.

Small Cell Networks for Mobile Network Offload

Wi-Fi and small cell

3G/LTE services

will improve the

broadband wireless

user experience,

lower broadband

data service costs

relative to 3G/

LTE, and provide

new revenue

opportunities

Current Mobile Network Operator (MNO) macrocell networks cannot cost effectively scale to meet capacity demands in dense user population environments. Operators are making use of lower-cost Wi-Fi and small cell 3G/LTE solutions as in-fill networks to augment existing services by bringing capacity closer to consumption while lowering cost per Gigabyte thus improving customers’ experience in dense urban areas.

With data demands increasing at a rate of 25x to 35x in the next 3-5 years (according to both FCC and Ofcom) and the potential for a larger increase in the future, a fundamental change in architecture is required. BelAir Networks believes that the most effective option to solve the mobile operator’s broadband challenges of today, and in the future, is with a Wi-Fi and small cell solutions architecture that co-exists with and complements capacity and coverage of macrocell networks in dense wireless user environments. A Wi-Fi and small cell architecture can increase capacity by a multiple of up to 100 by replicating cells more frequently and can deliver a better user experience as base stations are closer to the end user resulting in more frequent and consistent use of higher order modulations.

MNOs without significant wired broadband service capabilities have not been able to widely deploy small cell solutions due to a lack of locations with mounting rights, available power, and backhaul capacity. Strand-based Multiple System Operators (MSO), have access to all those critically important assets by using the Hybrid Fibre Co-axial (HFC) to deliver wireless services. The HFC offers the ability to rapidly deploy Wi-Fi and small cells at a scale, performance, and coverage not previously thought possible. Hosted and shared service capabilities, embedded in the Wi-Fi and small cell architecture, further enables new business models and revenue opportunities for MNOs, MVNOs and strand-based MSOs.

The industry trend towards virtualization of network infrastructure capabilities into cloud based services enables mobile service providers the opportunity to easily commercialize infrastructure services for multiple broadband access services. This also enables new revenue opportunities with business customers wanting to outsource IT infrastructure plus service provider partners who do not want to own and operate their own wireless infrastructure.

This white paper outlines an architecture and roadmap of key capabilities to offload data traffic from congested areas of 3G/LTE mobile networks on a targeted and wide scale. Wi-Fi and small cell 3G/LTE services will improve the broadband wireless user experience, lower broadband data service costs relative to 3G/LTE, and provide new revenue opportunities. With industry leading 3G offload solutions from BelAir Networks, service providers can:

• Increase customer satisfaction of broadband services • Utilize cloud services or re-use broadband service infrastructure for Wi-Fi services • Maintain control of the customer relationship and user experience across multiple wireless access

technologies• Seamlessly offload data traffic from 3G/LTE macro-cell services to carrier Wi-Fi • Offer 3G/LTE offload utilizing Wi-Fi and 3G/LTE small cell solutions from a single architecture

2 Copyright © 2011 BelAir Networks BDMC00140-A01


• Offer multiple Wi-Fi services from a single platform• Utilize 3G/LTE small cell capabilities for macro-cell data offload and coverage/capacity

enhancements• Offer shared and hosted services • Offer location based services• Offer advanced services for video applications• Rapidly deploy new services and coverage

Data Offload ArchitecturesThe massive global adoption of smartphones, tablet devices, and video applications, has driven Wi-Fi to become a mission critical service for mobile service providers to utilize in addressing 3G mobile data networks’ capacity shortfalls. 3G data offload is currently one of the high profile applications for service provider Wi-Fi and 3G Small Cells. Devices with multiple wireless access capabilities and the “always on Broadband” users are driving the need for mobile operators to offer a low cost and ubiquitous broadband service environment to maintain customer loyalty. This emphasizes the need for mobile operators to further develop innovative business models to enable shared and hosted network infrastructure. There will be an increasing need for partnering with Wi-Fi services including roaming, revenue, and cost sharing across MNOs, MVNOs, and strand based Multi-Service Operators (MSO).

Mobile service providers have a great opportunity to become the value added, mobile everywhere, service provider for their target markets. The challenge is to effectively provide:

• Mobile coverage to a wide array of wireless devices, customer types, and service areas • A cost competitive, high capacity network that meets the fast growing market demands for

subscriber functionality, performance, value, and personalization• A seamless subscriber experience for devices with: Wi-Fi, 3G, 4G, Wi-Fi/3G, and Wi-Fi/4G • Easy to use Wi-Fi service access models for customers, partner customers, and guests• Differentiated Wi-Fi video services to enhance the user experience of demanding applications

utilizing streaming video, video calling , and video broadcast• Subscriber control of a trusted Wi-Fi location based information source to enable mobile

capabilities for social networking, local advertising, and search applications• Differentiated Wi-Fi service personalization to enhance user experience and value• Trusted security of user data and network resources

The BelAir Networks architecture is modular, distributed, and flexible. The modularity enables separation of the core network functions from the radio access functions to allow straight forward integration with existing broadband network architectures and infrastructure services. The distributed, intelligent edge, policy enforcement and security provides for smooth and independent network capacity growth including; number of APs in the network, number of simultaneous users, and network data traffic capacity. The architecture is driven by the BelAirOS networking software and managed by the BelView

Copyright © 2011 BelAir Networks BDMC00140-A01 3


The immediate

market need for

Wi-Fi as a 3G offload

solution leads to

the need for an

end to end solution

architecture based on

available technology.

Network Management System. All the network management and gateway control functions can be deployed as a virtual appliance or as integrated products. The shared and hosted service capabilities of the BelAir Networks solutions enable new business models and revenue opportunities.

BelAir Networks solutions also enable subscribers to seamlessly move from access point to access point while maintaining their Wi-Fi and small cell connections as long as they remain in the service coverage area. This metro and national scale of seamless mobility is unique and especially important to allow wide scale Wi-Fi and small cell networks to deliver enhanced services like video, gaming, and VoIP to mobile users.

User Managed Data OffloadUser managed data offload is a user configured method for Wi-Fi enabled devices like smartphones and tablets to gain access to Wi-Fi networks as an alternative connection to 3G data connection for internet access. Figure 1 depicts an overview of the user managed data offload approach. This effectively provides data offload from 3G networks, however, it bypasses service provider involvement in the service for any value added capabilities. This offload method is being utilized today and will continue as an offload solution in some circumstances even when service provider offload solutions are offered. This offload method requires the user to configure the SSIDs to be recognized and configure any authentication information required to access the SSID. The benefits of this approach for the user are: higher performance data connection, lower cost data usage than 3G data (often free), and user control of data connectivity. This bypass of the service provider 3G core network for data represents a loss of revenue opportunity and a loss of user experience control. The benefits for the service provider is this 3G offload capacity is provided by a home or business and does not require any service provider resources.

Figure 1. User Managed Data Offload



3GPP AccessNetwork

WiFi AccessNetwork

3GPP Core Network

Public Internet

Industry Standard Architectures

3GPP I-WLAN architecture The term 3GPP-WLAN interworking refers to the utilization of resources and access to services within the 3GPP system by the Wi-Fi enabled device and user respectively. The intent of 3GPP-WLAN Interworking is to extend 3GPP services and functionality to the WLAN access environment. 3GPP I-WLAN is a 3GPP release 6 set of standards which have not been adopted by the market to date. Considering the limitations of this architecture and the creation of the 4G non trusted access architecture (3GPP release 8), BelAir Networks believes this architecture will not be widely deployed and is only included here for thorough analysis on industry standard approaches.

This Wi-Fi architecture is targeted to co-exist with 3G and 4G cellular service infrastructures based on 3GPP release 6 and onwards. An overview of the architecture is depicted in Figure 2. The key capabilities of this architecture are:

• Compatibility with 3GPP industry standard mobile architectures • Access to 3GPP core network connectivity• Access to internet connectivity via 3GPP core network connectivity• Access to 3GPP IMS services • Access to 3GPP mobile content

The key advantage of this architecture for mobile operators is the Wi-Fi service utilization of the 3GPP AAA service and PDG/PDN-GW infrastructure from a 3G/LTE core network. This architecture provides for automatic user authentication onto Wi-Fi services based on cellular subscriber ID information contained within the device for 3G/LTE service authentication. The main dis-advantages of this architectural approach are:

• No session continuity to/from 3G/LTE and Wi-Fi is supported • Local offload is out of scope in the I-WLAN standards• Requires IPsec tunneling from wireless device to PDG• Smartphones and Tablets do not presently support IPsec • IPsec network termination is resource intensive and adds complexity



Providing automated

Wi-Fi network

access significantly

increases service

utilization through

ease of use and user

transparency.

Figure 2. I-WLAN Architecture Overview (3GPP- Release 6)

4G Non Trusted Access Architecture (Wi-Fi/LTE)Figure 3 depicts an overview of the 4G Non Trusted access architecture based on the 3GPP release 8 set of standards. This architecture allows for various levels of integration between LTE and Wi-Fi networks, plus supports: seamless authentication, session continuity (Automated connection re-establishment), and fully integrated connection hand-off capabilities. This approach also requires IPsec tunnelling from the wireless device to the ePDG. This IPsec requirement is resource intensive for both the device and the ePDG.



Public Internet

3GPP Core Network

3GPP AccessNetwork

IMS

GWGW

WAG

OnlineCharging

OfflineCharging

HLR/HSS

AAA

PDG

Wi-Fi AccessNetwork

Wa

Wn

Public Internet

IMS

GGSN

SGSN

SGSN

Gn

Gn

IP address not preserved when migrating from/to Wi-Fi

IP address preserved when migrating from/to Wi-Fi

S4

Gx

S5/S8

S6b

S2b

S2c

SWm

SWnSWa

S1-U

S14

Gxb(not defined yet)

S12

SWu

UMTS/HSPAAccess Net

LTEAccess Net

PDN-GW

AAA

ePDG

Wi-Fi AP’s

ANDSF

PDN-GW

SERV-GW

eNB

Figure 3. Non Trusted Access Architecture (3GPP Release 8)

Deployment ReadinessBoth the I-WLAN and 4G non-trusted Wi-Fi architectures described above are not yet deployable for the following key technology shortfalls:

• Smartphones and tablets do not presently support IPsec for secure connectivity from the wireless device to the PDG/ePDG• There is a lack of commercially available ePDG/PDG industry standards defined products

BelAir Networks Solution ArchitectureGiven the growth in demand for offload solutions and the lack of commercial technology available for industry standards based solutions, BelAir Networks has over the course of the last decade perfected the deployment of thousands of access points to create a highly scalable and carrier grade Wi-Fi and 3G/4G offload networks. The BelAir Networks 3G offload solutions are based on a flexible Wi-Fi and 3G/LTE small cell architecture for smooth enhancement as requirements evolve to a Heterogeneous Network (HetNet). This approach allows mobile operators to deploy BelAir Networks 3G offload solutions today that leverage the large and diverse population of Wi-Fi enabled devices without the need of client software. Basing the BelAir Networks solution on the System Architecture Evolution (SAE) for the cellular core network ensures investment protection as the service provider’s core network evolves to support LTE. The overall BelAir Networks solution architecture is depicted in Figure 4.

Figure 4. BelAir Networks Architecture for Wi-Fi and 3G/LTE Small Cell Services



CAPWAP

IP

L2VPNPMIPor IP

L2VPNPMIPor IP

RADIUSor

WISPr

GTPGTPV2

or PMIPV6MAP

CAPWAP

Internet

BelAir20Evenue

3G GGSN or 3GPPPDNGW

Mobility Gateway

HLR/HSSBelViewNMS

AAAPolicyOSS

BelAirCIcore

BelAir100Nmesh

BelAir20EOmesh BelAir100NE

Co-Lomesh

BelAir100Pmesh

Picocell

BelAir200mesh

BelAir100SNEstrand

BelAir100SP/LPStrandpicocell

BelAir20Eindoor

BelAirCIvenueAccess Network

Enterprise Network

Control Plane

Data Plane

ManagementPlane

BelAirBIS


See the BelAir Networks Architecture Solutions white paper (BDMC00120) for full details on the service provider Wi-Fi and small cell architecture for all supported applications including 3G Offload.

BelAir Networks 3G/LTE Data Offload ArchitectureThe BelAir Networks solution is based on the SAE architecture and available 3GPP core network components to align our network evolution with 3GPP LTE standards evolution activities. The BelAir Networks approach of a single infrastructure to deliver both Wi-Fi and 3G/LTE small cells, allows the 3G offload solution to easily migrate into a fully integrated heterogeneous network (HetNet) with multiple wireless access technologies, SON managed, plus diverse wired and wireless backhaul. The BelAir Networks 3G offload solutions are based on an open and standards based architecture that allows for the inclusion of best of breed solution components, including cloud based infrastructure services.

The immediate market need for Wi-Fi as a 3G offload solution leads to the need for an end to end solution architecture based on available technology. Figure 5 depicts an overview of the BelAir Networks HetNet Mobility architecture.

Figure 5. BelAir Networks “HetNet Mobility” Architecture

The BelAir Networks Heterogeneous Network (HetNet) mobility architecture utilizes available functionality from smartphones and tablets, plus leverages available 3GPP core network capabilities for GGSN (GTPV1) and PDN-Gateway (GTPV2) connectivity. The Wi-Fi network connectivity to the cellular core network is achieved by having a direct GPRS Tunnelling Protocol (GTP) interface to the 3GPP GGSN or PDN-GW, which has no architectural impact on the 3GPP core network. The GGSN/PDN-GW can provide for Wi-Fi user connectivity to cellular core services, 3GPP content, and Internet access. IMS services and mobile operator portals are examples of 3GPP services that can be made accessible by Wi-Fi users.


3GPP Core Network

Controller Gateway

SWmGTPV1/V2

MobilityGateway

LocaloffloadCAPWAP802.11i

(ePDG minus TTG)

AAAGGSN/

PDN GW

OptionalIPSEC

Public Internet

The key 3GPP integration functionality is delivered by the Mobility Gateway (MG) function of the BelAir Networks architecture. The Mobility Gateway and Controller Gateway functions can be combined into a single integrated product for smaller deployments. The 3G offload functionality provided by the MG is:

• Aggregation of Controller Gateways (CG)• Trusted interface to 3GPP core network AAA services (SWm)• Local internet offload• Trusted 3GPP core network data interface (GTPV1/V2)

Wireless access communications is secured by standard 802.11i mechanisms supported in smartphones and tablets today. BelAir Networks is an industry leader in the deployment of CAPWAP (IETF RFC 5415) with secure transport for communications links between APs and the CG/MGs. The communication link between the CG and MG is IP and can optionally be secured by an aggregated IPsec tunnel which carries the traffic from all CG subtended APs and clients. This aggregated IPsec approach enables larger scalability through minimizing the IPsec overhead required to secure communications, if required.

Macrocell Site Co-locationBelAir Networks 3G offload solutions include integrated macrocell site co-location capabilities. These co-location capabilities are based on the deployment proven architecture depicted in Figure 6. This architecture is capable of delivering Wi-Fi and small cell 3G/LTE services from one infrastructure. The key elements of the cell site co-locations capabilities are:

• Macrocell backhaul, power, and mounting utilization• Cell site co-location APs • Mesh networking underlay architecture • Mesh networking APs delivering Wi-Fi and 3G/LTE small cell services

Figure 6. Cell Site Co-location Architecture



BelAir100NE

BelAir100P

BelAir100N

The BelAir Networks co-location solution utilizes BelAir100NE APs to provide the wireless mesh links from rooftop macrocell sites to street level mesh APs, plus provides the wired backhaul network connectivity at the macrocell site. The architecture supports multiple BelAir100NE APs for direct Wi-Fi service delivery or multiple mesh wireless access links to street level APs. BelAir100N APs are mesh nodes that provide Wi-Fi access and can be located on street level assets where mounting rights and an AP power source are available, such as building walls, street poles, and traffic lights. BelAir100P APS are mesh nodes that provide 3G small cell service and can be located on street level assets where mounting rights and an AP power source are available, such as building walls, street poles, and traffic lights.

Service Provider Managed Data OffloadService provider managed offload capabilities are enabled through an end to end Wi-Fi solution integration approach with 3GPP services by having control of Wi-Fi user authentication and network connectivity. The BelAir Networks architecture provides flexible and diverse user authentication capabilities, content delivery optimization, and simplified 3GPP core network integration. These key capabilities enable service providers to:

• Provide service to a wide range of Wi-Fi enabled devices • Support a wide range of customer access models • Guest, established customer, partner customer, …• Supports multiple partnering models for shared and hosted services • Control 3GPP data traffic off-load and on-load to/from the Wi-Fi access network• Maintain control of the user experience and customer relationship for broadband data• Monetize 3GPP content, services, and internet access to Wi-Fi connected users• Offload data from RAN and RAN/3G Core (Local offload)

Secure Seamless RoamingSeamless authentication is a key Wi-Fi service capability to enhance the Wi-Fi user experience towards parity with 3G services. Providing automated Wi-Fi network access significantly increases service utilization through ease of use and user transparency. To increase the potential service usage rate, a wide variety of authentication methods are supported by the BelAir Networks architecture to enable access from all common Wi-Fi enabled devices and allow known and unknown users access to the service. The diverse set of access methods include:

• Medium Access Control (MAC) authentication• Universal Access Method (UAM) /WISPr 1.0• 802.1x – with all the of Extensible Authentication Protocol (EAP) protocols to the RADIUS server• EAP-SIM/AKA – with full integration with the MNO's HLR/HSS • Hotspot 2.0 / Next Generation Hotspot (NGH)



Open AccessOpen access utilizing web redirect and MAC authentication enables Wi-Fi service access to the widest variety of potential Wi-Fi users. This is the entry level for seamless authentication and security. This method is based on a web portal for initial known user credential entry or guest payment capture, including creation of a user profile that includes the device MAC information. Further service accesses with the authenticated device can be seamlessly authorized based on a MAC pre-authorization check procedure. Figure 7 depicts the call flow for initial Wi-Fi attachment.

The BelAir Networks AP allows an unauthenticated device to start a DHCP session and allocates a local and temporary IP address. All http traffic from the user device will be redirected towards a landing Web page. The Web page provides a registration portal where the client credentials can be entered and stored. The client MAC is also captured and stored during this process for use in further access authorization requests to provide the seamless authentication.

Figure 7. Integrated Re-direct with MAC Pre-check

Secure Access-EAP Utilizing EAP mechanisms for network access provides an increased level of integrated Wi-Fi access security and authentication automation.



Client AP Network

Web Server

DHCP

http

redirect

http

Login page

Credentials

redirect

Allow access

redirect

http

Check MAC with RADIUS

Check MAC results

Check policy with RADIUS and start accounting

Policy Manager Customer Records

RADIUS

Provide privateaddress

Not pre-Authorized

Check MAC forregistration

Blocked and sent to login page Web Server allows

user to login

Internet accessis allowed here

Web Server checks with

RADIUSApplicable Policy

derived from customerdata records or roaming databaseCheck Credentials

OK Policy

OK

GO

II

Figure 8. EAP Detailed Call Flow

Secure Access-EAP SIM/AKAEAP SIM/AKA authentication enables the network operator to re-use their 3G, or 4G authentication services for Wi-Fi access as well. Utilizing EAP SIM/AKA allows the network operator to maintain control of the user data sessions for offload to Wi-Fi from the 3GPP data session and vice versa. Figure 8 depicts the detailed EAP SIM call flow and Figure 9 provides the initial overall attachment call flow including into the 3G/EPC core network.



Client AP Network RADIUS

Access Request (association)

Authentication

Master Key (MK)

4 way group handshake to generate the various

Transient and Temporal keys(PTK, - KCK, KEK, GTK, TK...)

(PMK) (PMK)

DHCP

Allow access

Pairwise Master Key (PMK)

RADIUS

Supplicant Authenticator AAA Server

RADIUS

Authenticationmessages

GO

EAPOL

II



Figure 9. EAP SIM/AKA to 3GPP Call Flow

Hotspot 2.0 BelAir Networks is an active member of the Wi-Fi Alliance task group developing the Hotspot 2.0 industry standard. Hotspot 2.0 is intended to simplify and unify the Wi-Fi user experience when utilizing service provider Wi-Fi networks. Hotspot 2.0 is a collection of standards that provide a cohesive approach to address: user authentication (EAP SIM/AKA and TLS/TTLS) and service query & advertisement (802.11u/ANQP) as well as operator policy download to devices over the air (new) and on-line service signup (new). This standardized set of capabilities will enhance the user experience when utilizing Wi-Fi and offer the service provider new revenue opportunities by enabling value added services, and on-line sign up to Wi-Fi users.

Session MobilitySession mobility between 3G and Wi-Fi networks will enable users to roam between 3G data and Wi-Fi data connectivity without their application sessions being terminated. The always on broadband community sees this capability as very important for the Wi-Fi user experience. The application types that benefit the most from session mobility are: FaceTime, Music/Video content streaming, social networking, VoIP calling, gaming, and many VPNs.

Seamless Wi-Fi to 3G/LTE Service ConnectivityData session connectivity between Wi-Fi networks and 3G/LTE networks is enabled by GTP encapsulation of traffic to the PDN-GW or GGSN in the 3GPP core network (See Figures 5 & 9). GTP encapsulation in the Mobility Gateway (MG) toward the GGSN/PDN-GW allows Wi-Fi access to the Internet through the 3G core

Initial EAP-AKA authentication for access

DHCP Discover

Create Session Req

Create Session Rsp

DHCP Ack

DHCP Request

DHCP Offer

End-to-end IP traffic

PDN-GW Addr Update

IP-CAN Session Estab

BelAirAP/CG AAA PDN-GW PCRF



network as well as access to 3G core services and content. The BelAir Networks solution also offers a local data offload capability directly to the Internet to offload the 3G core network as well as the Radio Access Network (RAN) offload.

Seamless Wi-Fi Session Mobility in Very Large Wi-Fi NetworksFor very large networks, encompassing multiple MGs, this is achieved by mapping standard DHCP messages from the Wi-Fi device to 3GPP handover indication messages to the PDN-GW when roaming across MGs. In this way the Wi-Fi device IP address does not need to change, enabling full session mobility across massive Wi-Fi networks.

Seamless EPC to Wi-Fi Session MobilityThis final step in the BelAir Networks HetNet mobility architecture enables seamless session handover when roaming from EPC to Wi-Fi networks and vice versa without requiring any special client software. BelAir Networks is working with tier-1 EPC vendors to enable this solution. The BelAir Networks MG communicates with the EPC AAA / HSS server to obtain the 3GPP IP addresses of the roaming client. Using that information, the MG then initiates a GTP handover indication to the PDN-GW, using that address, to convey the client is roaming. The PDN-GW communicates with the serving gateway to determine if there is already an active session on the 3GPP network, and if so, terminates the 3GPP session. All established sessions and applications remain active when roaming to Wi-Fi as there is no active session termination in this method. The established 3GPP application session will be preserved when roaming to Wi-Fi using this approach.

3GPP Core Broadband Services

Charging IntegrationBelAir Networks 3G/LTE offload solutions leverage the established 3GPP core network capabilities for Wi-Fi charging systems support. The BelAir Networks solution for EPC core networks relies on the PDN-GW to perform all the necessary usage measurement and interfaces necessary to support online and offline charging systems. This approach has no architectural impact on the EPC core network in order to support integrated Wi-Fi services

IMS services The BelAir Networks solution enables the service provider to offer IMS based services to Wi-Fi connected

clients. Applications based on IMS presence, instant messaging, or video streaming can be made available to clients on 3GPP or Wi-Fi access. The BelAir Networks solution has the key capabilities to support today’s IMS services, plus planned services such as Rich Communications Service (RCS), video telephony, and video sharing services.

BelAir Networks 3G/LTE Offload AdvantagesThe BelAir Networks HetNet mobility solution offers a number of key advantages compared to the 3GPP IWLAN and 4G untrusted network models:

• Unmatched carrier scale and reliability • Deployment proven macrocell site co-location and mesh underlay architecture • Industry leading mesh network performance and scalability• HetNet Mobility Architecture for Wi-Fi , 3G/LTE, and future small cell services• Solution utilizes present client device, GGSN, and PDNGWs allowing for deployment today



• No client software is required • GTP integration approach with GGSN/PDN-GW minimizes impact to 3GPP core networks when adding

Wi-Fi services • Open and industry standards architecture enables best of breed solutions• Lawful Intercept based on industry leading Mobility Gateway, and PDN-GW capabilities• Charging support based on PDN-GW charging capabilities • Optimized performance of video and location enabled applications• Ease of network and operations integration

ConclusionAs the mobile community continues to fuel data demand with increasing numbers of Wi-Fi and 3G/4G devices and video enabled applications, mobile service providers are compelled to consider Wi-Fi and small cell solutions as mission critical services required to remain competitive.

BelAir Networks 3G offload solution is deployable today with investment protection for migration to LTE and a Heterogeneous Network supporting many wireless access technologies.

BelAir Networks Wi-Fi and small cell managed services offer MNOs, MVNOs, and strand based MSOs new business models for partnering and new hosted and shared revenue opportunities. The shared services and cloud infrastructure services approach also provides new shared business and revenue model approaches for SMBs, Large Venues, Large Enterprises, and Metro based public and private services.

3G offload is the present driving force for service provider Wi- Fi, however, Wi-Fi will also continue to be integrated into mobile operator networks as a more ubiquitous, high performance and lower cost wireless data service into the future.



The BelAir Networks solution meets or surpasses all the key service and network values discussed here, in a robust and highly available solution designed for wide scale mobile service provider deployments.

Glossary of Terms 3G 3rd Generation cellular3GPP 3rd Generation Partnership Project3GPP I-WLAN 3GPP – 3G and Wireless LAN Interworking 802.11i IEEE specification amendment for Media Access Control security enhancementsAAA Authentication, Authorization, and AccountingAC Access Controller for WLANs defined in CAPWAP specificationANDSF Access Network Discovery and Selection Function (3GPP Specification) ANQP Access Network Query Protocol (part of IEEE 802.11u)AP Access PointBNMP BelAir Networks Network Management ProtocolCAPWAP Control and Provisioning of Wireless Access Points (IETF – RFC 5415)Controller Wireless network element providing AP management, AP aggregation, user mobility and Gateway local offloadDHCP Dynamic Host Configuration Protocol (IETF Specification)EAP SIM Extensible Authentication Protocol Method for GSM Subscriber Identity Module (IETF Specification)EAP AKA Extensible Authentication Protocol Method for UMTS Authentication and Key Agreement (IETF Specification)EPC Evolved Packet CoreePDG Evolved Packet Data GatewayFA Foreign AgentGGSN Gateway GPRS Support NodeGRE Generic Routing Encapsulation GTP GPRS Tunnelling Protocol (Version 1/Version 2)GW Network GatewayHA Home AgentHetNet Heterogeneous NetworkHFC Hybrid Fiber Co-axial HLR Home Location RegistryHotspot 2.0 Wi-Fi Alliance set of industry standards for Wi-Fi network discovery and authenticationHSS Home Subscriber ServerIMS IP Multimedia SubsystemL2TP Layer 2 Tunnelling ProtocolL2VPN Layer 2 Virtual Private NetworksL2VPNoGRE Layer 2 Virtual Private Network over GRE LAN Local Area NetworkLTE Long Term Evolution Network (4G)MAC Media Access ControlMobility The transparent wireless connectivity of mobile users while roamingMobility Wireless network element providing Controller Gateway aggregation, user Gateway mobility, internet access, and 3G/LTE network integrationMNO Mobile Network OperatorMSO Multi Service OperatorsMVNO Mobile Virtual Network OperatorNGH Next Generation HotspotOnline Charging Charging systems capable of processing real time client usage information for service modification based on client policies and entitlements (Pre-paid)Offline Charging Charging systems for processing client usage billing (Postpaid) PCRF Policy and Charging Rules Function (3GPP) PDG Packet Data GatewayPDN GW Pack Data Network GatewayPEP Policy Enforcement Point


Copyright© 2011 BelAir Networks. BelAir Networks products and associated technology are protected by one or more of the following US patents: 7,171,223 / 7,164,667 / 7,154,356 / 7,030,712 / D501,195 / 7,545,782 / 7,433,343 / 7,162,234 / 7,433,361

To find out more, contact BelAir Networks: [email protected] [email protected] 1-877-BelAir1 (1-877-235-2471) 1-613-254-7070 www.belairnetworks.com BDMC00140-A01

PMIP Proxy Mobile Internet Protocol (IETF Specification)QoS Quality of ServiceRAN Radio access NetworkSaaS Software as a ServiceSAE System Architecture Evolution – core network for LTE SGSN Serving GPRS Support Node Serv-GW Serving GatewaySeamless Mobility Transparent mobile user connection and session persistency when roaming between APsSmall Cell Synonym for short range 3G and LTE wireless base stationsSNMP Simple Network Management ProtocolSON Self Organizing Network (3GPP)SSID Service Set IdentifierTR069 Broadband Forum technical specification - CPE WAN Management ProtocolUMA Unlicensed Mobile AccessVoIP Voice over Internet ProtocolWAG Access control for Wi-Fi usersWi-Fi Synonym for the 802.11 family of standardsWTP Wireless Termination point (WLAN AP) defined in CAPWAPWLAN Wireless Local Area Network


Documents

BelAir SmallCell WP