Launch Fully Integrated Voice Over Wi-Fi in a Fraction of ... · Launch Fully Integrated Voice over Wi-Fi in a Fraction of the Time 3 Mitel provided 100 percent wireless service parity

“Mobile operators can take advantage of voice over Wi-Fi in less than six months, from contract to launch.”

Solution brief

Carriers Want Better Coverage without Disruptions and High CostsMobile operators want to increase their subscriber base by improving in-building coverage using the network edge, as well as a mechanism that allows those subscribers to use their mobile devices and IDs overseas without incurring expensive roaming fees. But it’s difficult to justify the expense of an LTE 4G network before reaching a specific number of potential subscribers. And transitioning to a new network brings inevitable disruptions in service for subscribers, which drives satisfaction levels down.

Operators want a simple option for in-building coverage using the Wi-Fi solution on premises without the high cost of a network buildout; a solution that provides the following:

• Ease of Use. Subscribers can quickly and easily select a setting on their mobile devices with a simplicity that assures greater adoption rates.

• Coverage. Subscribers can use on-premises Wi-Fi coverage, when available, for improved coverage and reduced roaming charges.

• Scalability. Operators can easily add subscribers without degrading the service level or disrupting the coverage for existing subscribers.

Software-Based Network Solutions Reduce Cost and DisruptionUsing virtual network functions (VNF) and IP multi-media subsystem (IMS), Mitel*’s software-centric approach to voice over Wi-Fi (VoWiFi) can integrate into existing network environments without disruption to subscriber service.

Operators with datacenters already equipped with Hewlett Packard Enterprise* (HPE*) - based equipment can take advantage of VoWiFi in less than six months, from contract to launch. Compare that to traditional implementations that can take up to three years. Mitel’s solution also includes full integration over the virtual IMS with existing systems, such as charging and billing, to ensure a consistent subscriber experience regardless if they use VoWiFi or their regular service.

Mitel’s VoWiFi solution provides the following benefits to operators:

• Decreased Time-to-Market. Time-to-market is improved from an average of three years to just six months with full integration with other systems. This prevents disruptions and inconsistency in the subscriber experience, ultimately improving customer satisfaction.

• Increased Cost Savings. Using existing HPE-equipped datacenters, rather than building out new networks, significantly eases virtual IMS system expenses. This further reduces disruptions to subscribers as well.

Mitel* delivers voice over Wi-Fi faster and with less disruption to existing network services.

Launch Fully Integrated Voice Over Wi-Fi in a Fraction of the Time

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• Improved Performance. With a fully integrated system, the subscriber experience remains the same whether they use VoWiFi or regular service. And the system can easily scale to meet the demands for a growing subscriber base.

The Benefits from On-Demand ScalingThe elasticity provided by VNF gives operators a flexible advantage. Mitel’s VoWiFi scales easily, so operators don’t need to predict how many subscribers will eventually use the service prior to implementation. For example, a system originally designed for 50,000 subscribers could experience a dramatic jump to hundreds of thousands of subscribers if VoWiFi suddenly became a market default. Mitel’s flexible commercial licensing model couples with an equally flexible technology solution, allowing operators to take a “wait and see” approach and grow it as they need to.

T-Mobile*’s Next Generation Mobile Experience Using MitelWi-Fi was a logical step for T-Mobile* U.S. to effectively enhance its cellular network, and T-Mobile US has become a disruptive force within the country’s wireless community. It used its existing underlying infrastructure with Mitel VoWiFi, enabling it to quickly deploy new services nationwide without risk.

Customer-centric excellence remains a foundational principle at T-Mobile U.S., and its previous solution provider was unable to maintain compatibility with core services, such as billing and authentication, ringtones, and call forwarding. Since 2011, the underlying technology supporting T-Mobile U.S.’s disruptive strategy is Mitel. The

guarantee was to deliver the same user experience, regardless of the core network.

Mitel’s VoWiFi solution provides the following for T-Mobile US:

• Faster Time-to-Market. With Mitel, T-Mobile US can launch services considerably faster than its competitors and without disclaimers that degrade the brand.

• Elastic Scaling. Mitel provides on-demand scaling to meet T-Mobile’s growing subscriber base.

• Reusable Components. As their VoWiFi service grows, T-Mobile can reuse and repurpose components as needed.

• Uninterrupted Customer Experience. Operator-branded VoWiFi extends services to all deployed smartphone devices. The proven integration works with OEM smartphone-native VoWiFi clients.

End-to-End Solution for Voice over Wi-Fi

Mitel offers a full end-to-end solution for operators who do not already have an HPE-based datacenter. Implementations typically include a software stack made up of pre-integrated telephony application server, messaging application server, IMS core, session border controller (SBC), enhanced packet data gateway (ePDG), and device client.

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Mitel provided 100 percent wireless service parity and T-Mobile U.S. accelerated network readiness for not only voice over LTE as seen in Figure 1, but also video calling, advanced messaging, and future services. T-Mobile U.S.’ rapid roll out of services in 2014-15 demonstrates the disruptive impact IMS has on the U.S. wireless marketplace.

Ecosystem Partners Deliver Innovation and PerformanceWith its unparalleled experience in IT and a long standing telecommunications expertise, HPE serves as a trusted partner to Communications Service Providers (CSP) as they embark on a journey to the Telco Cloud. Recognizing that the benefits of NFV cannot reach its full realization without open solutions and a robust ecosystem of partners, HPE launched its OpenNFV Partner Program for network equipment providers, independent software vendors, and system integrators. The OpenNFV Partner Program upholds a very important move to create a rich, vibrant, and open ecosystem of VNFs.

The goal for HPE’s OpenNFV Program focuses on creating a platform on which CSPs have the freedom to choose applications from their vendor of choice

As part of the OpenNFV platform, HPE provides the NFV infrastructure (NFVI) running on HPE’s converged servers; the HPE Helion* OpenStack Carrier Grade which provides the virtualization layer and VIM functionality and the HPE* NFV Director for NFVO (NFV Orchestrator) and in many cases VNFM functionality. This platform then acts as a foundational reference architecture on which VNFs (from HPE or from any third party partners) can receive tests and benchmarks for performance.

OpenNFV Labs (located in the U.S., France, Israel, and South Korea) help partners accelerate their design, proof-of-concept, trial, and deployment of cloud-enabled network services. The primary goal for HPE’s NFV Labs revolves on assuring CSPs that proposed solutions from multiple vendors get pre-tested and integrated – thereby saving them valuable time and effort in network validation during deployment.

Figure 1. Regardless of the device and core services, subscribers enjoy the same branded experience.

Intel® Open Network Platform

Intel developed an architecture platform based on the ETSI standards for NFV in an effort to accelerate development of commercial hardware and software platforms. The Intel® Open Network Platform (ONP) provides a reference architecture that redefines network architectures by decoupling the network functions from the hardware itself. This provides the Network Function Virtualization Infrastructure (NFVI) necessary to virtualize functions. With ONP, companies in telecom carrier networks, enterprise environments, and cloud data centers can more easily build solutions using an open source software stack running on commercial, off the shelf servers. With the ONP reference architecture, solution providers can plan, evaluate and benchmark designs in advance of NFV deployments.

Data Network

CS Circuit Network

Wi-FiWireless Access

LTE/4GMobile Access

AG ApplicationGateway

MRFC/PMedia Resource

ePDG

ATCF/ATGWS-GW

Third Party

Mitel

POW Packet Data

Gateway

ePDG Evolved Packet Data Gateway

CTAS TelephonyApp Server

PMS (IP-SM)(MMSC)

A-SBC Session Border

Controller

MGCF/MGWMedia GW

S/I-CSCF Call Session

Control

BGCF BreakoutGateway

Wi-FiAccess Point

Wi-FiAccess Point

HSS

HLR

EPC (Evolved Packet Core) and IMS Core

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HPE commits to developing open solutions and an open ecosystem that will accelerate the CSP transformation journey to the Telco Cloud. HPE remains a key contributor to open source initiatives like OpenStack, OpenDaylight Project, OPNFV, and numerous other Industry initiatives and organizations.

ConclusionOperators interested in providing better coverage without the expense to build out a LTE 4G network, as well as reducing subscribers’ roaming fees while overseas, turn to Mitel’s VoWiFi solution. Mitel’s software-centric approach to VoWiFi with VNF and IMS is a low risk, affordable solution. Subscribers enjoy increased coverage, easy to use options, and no disruption

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in performance or changes to the user experience.

With an existing HPE-equipped datacenter, operators can decrease time to market from years to months, reduce costs by taking advantage of existing installations, and easily scale to increased subscriber levels.