Download - Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

Transcript
  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    1/13

    Whitepaper

    VoLTE and VoWi-Fi: crucial

    deployment and assurance

    considerations for operators

    March 2015

    Anil Rao

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    2/13

    VoLTE and VoWi-Fi: crucial deployment and assurance considerations for operators | i

    © Analysys Mason Limited 2015 Contents

    Contents

    Executive summary 2 

    2 VoLTE uptake will increase with LTE but the business case remains unclear 3 

    The current state of LTE 3 2.1

      VoLTE forecast 3 2.2

      The cost of deploying IMS and technological complexity are inhibitors 4 2.3

    3 Operators must get it right first time 5 

    VoLTE increases network complexity and presents new assurance challenges 5 3.1

      Vigorous pre-launch service validation testing can mitigate the risks 6 3.2

      IP probes will be crucial for assuring VoLTE post-launch 6 3.3

    4 Operators should focus on a holistic customer experience 7 

    Deploy advanced analytics and service management applications to measure end-to-end QoS 7 4.1

     

    Compensate for poor coverage with small cells and VoWi-Fi 7 

    4.2

    5 Vendor solution overview  –  Polystar Group 8 

     Network and Customer Insight solutions 8 5.1

      Solver 9 5.2

      ODIN 10 5.3

    About Analysys Mason 11 

    About Polystar Group 12 

    List of figures

    Figure 1.1: VoLTE challenges [Source: Analysys Mason, 2015] .... ............................................................... . 2 

    Figure 2.1: LTE connections forecast [Source: Analysys Mason, 2015] .......................................................... 3 

    Figure 2.2: VoLTE connections forecast [Source: Analysys Mason, 2015] ..................................................... 4 

    Figure 2.3: Current state of VoLTE launches [Source: Analysys Mason, 2015] .............................................. 4 

    Figure 5.1:Polystar solution [Source: Polystar, 2015] ..................................................................................... . 8 

    Figure 5.2: Validation test methodology [Source: Analysys Mason and Polystar, 2015] ................................ 9 

    Figure 5.3: ODIN pre-IMS [Source: Polystar, 2015] ......................................................... ............................. 10 

    Figure 5.4: ODIN post-IMS [Source: Polystar, 2015] .................................................................................... 10 

    Analysys Mason does not endorse any of the vendor’s products or services discussed in this whitepaper.

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    3/13

     | 2

    © Analysys Mason Limited 2015 Executive summary

    1. Executive summary

    Voice over LTE (VoLTE), the next-generation voice service delivered over the LTE infrastructure, is slowly

    gaining traction. Many operators, especially in developed markets, have already launched the service, and many

    more in other markets are expected to follow as LTE penetration increases and coverage improves. Increasedspectral efficiency and improved voice-domain efficiency are the main business benefits of migrating to

    VoLTE, in addition to the savings that can be achieved by retiring legacy 2G infrastructure. However, an

    uncertain business case and the high costs of deploying an IP multimedia subsystem (IMS) platform, the

     backbone of VoLTE, continue to be significant inhibitors, especially for Tier 2 and Tier 3 operators. 

    Despite the rise of data services, voice continues to be a significant source of revenue for mobile operators.

    Given the proliferation and consumer affinity for OTT voice and messaging services, the onus is firmly on the

    operators –  they cannot afford to go wrong with VoLTE. Exacerbating the situation is the technological

    complexity introduced by VoLTE. Single radio voice call continuity (SRVCC), for example, has been

    introduced to provide seamless voice service across both legacy and LTE networks. Voice over Wi-Fi (VoWi-

    Fi) offers another viable solution to the larger challenge of ensuring sufficient outdoor and indoor coverage, butwill require additional call handover capabilities to VoLTE. Ultimately, operators should be aiming to

    collectively improve the user experience of the voice service.

    Figure 1.1: VoLTE challenges

     [Source: Analysys Mason,

    2015]

    Figure 1.1 summarises the challenges facing VoLTE. To counter some of these challenges, operators need a

    robust pre-launch test and validation strategy, and a post-launch comprehensive service assurance capability to

    assure end-to-end quality of service. Operators who want to launch VoLTE should consider cost-efficient and

    lightweight IMS solutions that can enable them to quickly deploy and offer the service, while providing a clear

    migration path to a full IMS solution.

    VoLTE

    challenges

    Technological

    complexity

    High deployment

    costs

    Ensuring QoS and

    customer experience

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    4/13

     | 3

    © Analysys Mason Limited 2015 VoLTE uptake will increase with LTE but the business case remains unclear

    2. VoLTE uptake will increase with LTE but the business case

    remains unclear

    The current state of LTE2.1

    VoLTE is the new incarnation of the native mobile voice service delivered over LTE networks. The last five

    years have seen significant investment in and proliferation of LTE networks with mobile operators in South

    Korea, Japan and later North America deploying LTE networks to accelerate the take-up of data services and

    increase revenue. The ability to create larger data allotments compared with 3G supported by ever more capable

    devices will continue to accelerate the uptake of LTE technology in emerging markets over the next five years. 

    At the end of 2014, there was an estimated 498 million LTE connections (handsets and mobile broadband), and

    this is expected to grow to 2.463 billion connections by 2019. 

    Figure 2.1: LTE

    connections forecast

     [Source: Analysys

    Mason, 2015]1 

    VoLTE forecast2.2

    Many LTE smartphones that were early entrants did not have native support for voice services and relied on the

    circuit-switched (CS) network to deliver voice and SMS services either by running two radios simultaneously or

    through the circuit-switched fallback (CSFB) mechanism. The 3GPP has specified a native LTE voice service,VoLTE, which includes SRVCC, a mechanism to interwork with existing network functions to provide service

    continuity both in terms of coverage (supporting voice services when outside LTE coverage) and also in terms

    of feature support (such as emergency calls, interconnection and roaming). 

    1 Refer to Global telecoms market: interim forecast update 2014–2019, available at

    http://www.analysysmason.com/Research/Content/Regional-forecasts-/Global-telecoms-forecasts-Feb2015-RDDG0

    498

    861

    1279

    1692

    2086

    2463

    0

    500

    1000

    1500

    2000

    2500

    3000

    2014 2015 2016 2017 2018 2019

       L   T   E  c  o  n  n  e  c   t   i  o  n  s   (  m   i   l   l   i  o  n  s   )

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    5/13

     | 4

    © Analysys Mason Limited 2015 VoLTE uptake will increase with LTE but the business case remains unclear

    By 2018, it is expected that about 600 million smartphone users worldwide will use VoLTE as their default

    voice service (Figure 2.2). Following from their leadership in LTE, the developed Asia – Pacific region and

     North America will maintain their lead in VoLTE. In other regions, limited LTE coverage will give operators

    little choice but to rely on 2G and 3G networks for voice services in the near term (Figure 2.3). 

    Figure 2.2: VoLTE connections forecast [Source: Analysys Mason, 2015]2 

    Figure 2.3: Current state of VoLTE launches [Source: Analysys Mason, 2015]

    The cost of deploying IMS and technological complexity are inhibitors2.3

    VoLTE promises important business benefits, prime among them are:

      Operators can achieve increased spectral efficiency because they can free up 2G and 3G carriers by

    moving voice traffic to LTE networks, freeing up capacity and allowing them to reuse the valuable

    spectrum for revenue-generating data services.

      Operators can harness increased efficiency in the voice domain because the LTE interface is very

    efficient and can support up to twice as many voice users in a given bandwidth (per megahertz) as circuit-

    switched services.

    Additionally, the higher voice quality promised by VoLTE adds impetus to the marketing position for operators,

    especially for those aiming to position the service against the established OTTs such as Skype, Viber, etc. Given

    the perceived benefits, one would expect a faster adoption of the VoLTE service. However, the roll-out of

    VoLTE services is not necessarily straightforward because it requires considerable investment in an IMS core

    that is designed to support multimedia sessions in an all-IP environment. Analysys Mason estimates that for a

    typical Tier 1 operator, the cost of deploying and operating an on-premise IMS solution would be about

    USD9 million – USD10 million3 for an initial VoLTE subscriber base of around 2.5 million, and the annual cost

    can rise to about USD45 million in 5 years, for a subscriber base of around 75 million. In the long run, the

    operator would break even by harnessing the spectrum benefits, but the business case tends to be complicated

    and uncertain. The scale of the problem becomes even more magnified in the case of smaller Tier 2 and Tier 3

    operators, as they cannot afford such high deployment costs and long implementation times with unclear

     business benefits.

    2 Refer to OTT communication services worldwide: forecasts 2013–2018, available at

    http://www.analysysmason.com/Research/Content/Reports/OTT-communication-services-worldwide-forecasts-20132018

    3 Refer to VoLTE business cases: the value of spectrum reuse, an enhanced feature set and virtualisation, available at

    http://www.analysysmason.com/Research/Content/Reports/VoLTE-business-cases-Feb2015-RMA04-RDMV0

    0

    100

    200

    300

    400

    500

    600

    700

    2010 2011 2012 2013 2014 2015 2016 2017 2018

       U  s  e  r  s   (  m   i   l   l   i  o  n  s   )

    31

    16

    10

    0

    5

    10

    15

    20

    25

    30

    35

    In deployment Launched Trialling

       N  u  m   b  e  r  o   f  o  p  e  r  a   t  o  r  s

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    6/13

     | 5

    © Analysys Mason Limited 2015 Operators must get it right first time

    3. Operators must get it right first time

    Despite showing a declining trend, voice is still the highest revenue-generating service for mobile operators.

    Moreover, customers still expect a high-quality voice service. This, together with the established quality of

    service (QoS) expectations of CS voice, places significant pressure on operators to get VoLTE right first time.However, operators face the difficult task of implementing an expensive and extremely complex network

    technology and an unclear business case.

    VoLTE increases network complexity and presents new assurance challenges3.1

    Because of the inherently complex nature of the technology, operators face a variety of network and operation

    support system (OSS) challenges to successfully launch, operate and assure VoLTE. Some of these key

    challenges are discussed below.

      Call handover in the RAN  –  In a scenario in which a user has initiated a call in an LTE cell but moved out

    of LTE coverage mid-call, the call must be seamlessly handed over from LTE packet-switched (PS)

    network to the 2G/3G CS voice network. Call drops must be avoided and the expected call quality in terms

    of latency and QoS must be maintained.

      Call anchoring in the core network for SRVCC  –  As the calls can be either PS or CS depending on the

    radio coverage, all calls must be anchored by the IMS. As calls are handed over from PS to CS voice

    network and vice-versa, the IMS needs to accurately maintain the state of the call and provide control for

     both outgoing and incoming calls.

      Expected signalling overloads –  Operators have deployed diameter routing agents (DRA) for load

     balancing of signalling overload from smartphones. It is expected that VoLTE will further increase thesignalling load and any DRA failure will have a significant impact on the VoLTE service.

      End-to-end quality of service  –  Voice being real time in nature, any degradation in network performance

    can have a noticeable impact on call quality. The network has to be optimally tuned to ensure voice packets

    get the highest priority (assigning the appropriate QoS Class Identifier (QCI)). Some of the network

     performance KPIs such as bit-rate, latency, jitter and packet loss must be monitored and actioned in real

    time. Application KPIs such as call set-up delay, call set-up success rates, failed calls, dropped calls and

    mean opinion score (MOS) can be used for further analysis to both reactively and proactively assure the

    service.

      Network performance  –  The network performance and optimisation and self-organising network (SON)capability will enable operators to monitor and assure the VoLTE service in real time.

      Assuring QoS in the RAN and at cell edge  –  Assuring QoS in the RAN is a significant challenge for

    operators, which is further accentuated as customers move to the edge of the cell, as low reliability of the

    connection and interference from neighbouring cells can result in dropped calls.

    Operators face a significant risk of launching an ill-conceived service and failing to meet customer expectations

    if they do not carefully plan for all failure scenarios.

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    7/13

     | 6

    © Analysys Mason Limited 2015 Operators must get it right first time

    Vigorous pre-launch service validation testing can mitigate the risks3.2

    Operators can partly minimise the risks by following a thorough service validation test regime before the launch.

    In doing so, they must consider a plethora of factors and scenarios. Consider, for example, the different call

    scenarios that are possible, such as VoLTE to VoLTE, VoLTE to 2G/3G/CDMA and vice-versa, VoLTE to

    PSTN and vice-versa, E911 and lawful intercept, among others. Furthermore, many legacy network componentsmust be tested because of the software upgrades related to SRVCC.

    The regime needs to cover a wide range of both test methods and scenarios, including handover between

    different networks and domains. For example, such a test regime should include the simulation of individual

    user sessions from both real and test devices. Test devices can be simulated in sophisticated equipment that can

    generate both signalling and media plane traffic, to ensure consistent end-to-end performance. Flows can be

    examined at various points across the network to verify compliance with relevant standards and interworking.

    Individual test cases and scenarios should also be complemented by high volume stress testing, which can

    include mass call or session generation. As VoLTE promises higher quality service, it is also essential to

    validate session quality, for both voice and video. This can be achieved through the use of algorithms such as

    PESQ/POLQA and PEVQ. If operators intend to position VoLTE as a best-in-class solution, then they must be

    able to guarantee that it performs as expected.

    IP probes will be crucial for assuring VoLTE post-launch3.3

    As operators look to launch VoLTE, they must deploy and scale IP probes that are capable of monitoring the

    key interfaces, IP voice traffic and the related protocols to support voice transmission over a PS network. In

    VoLTE, the control plane is used for authentication, mobile attach and bearer creation, while the SIP signalling

    and the IP voice traffic is carried over the user plane. Probe solutions that are capable of correlating control-

     plane and user-plane data for effective troubleshooting will be needed.

    A network call set-up for VoLTE requires significant levels of co-ordination among disparate network elements.

    Signalling for attach registration and call control must be monitored for troubleshooting. A call handover

    scenario (SRVCC) is even more complex as it involves more signalling complexity between the IMS, core

    network and RAN. IP probe solutions cover most of this functionality and are going to be an important part of

    operators’ service assurance strategy. 

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    8/13

     | 7

    © Analysys Mason Limited 2015 Operators should focus on a holistic customer experience

    4. Operators should focus on a holistic customer experience

    The ability to offer a high-quality voice service and superior customer experience is vital for operators to be able

    to compete with the OTT VoIP service providers. As operators prepare to launch VoLTE or scale up the service,

    they will need a two-pronged strategy to ensure that customer experience is not compromised.  

    Deploy advanced analytics and service management applications to measure end-4.1

    to-end QoS

    By design, VoLTE with SRVCC utilises both the PS and CS network infrastructure to deliver the voice service.

    Calls handed over to the CS voice network will need to be monitored and assured for the QoS that has been

    traditionally delivered. From an end-to-end perspective, where a call was initiated in LTE and handed over to

    the CS network, the solution needs to be in a position to perform root cause analysis and cross-domain

    correlation across LTE, 2G/3G and IMS components.

    From a customer experience management perspective, a VoLTE service management application providing per-

    customer KPI reporting as well as additional guidance on likely reasons for service degradation enables both

    operations and customer care personnel to better troubleshoot issues and manage customer relationships

    effectively. Such reporting applications enable other internal organisations such as network engineering to better

     plan and optimise network resources for optimum customer experience. Marketing teams would also potentially

     benefit from this insight.

    Compensate for poor coverage with small cells and VoWi-Fi4.2

    Mobile data consumption will continue to grow rapidly as the LTE networks expand, and the take-up of

    smartphones and other mobile broadband devices increase, causing coverage and capacity problems for mobileoperators. As VoLTE becomes more mainstream, operators will be particularly hard pressed to address this

    issue because an inability to make voice calls due to poor coverage issues will result in poor customer

    experience and cause churn. Operators must plan to minimise the network blind-spots and provide sufficient

    coverage at the most likely places where customers are expected to use the VoLTE service –  for example, at

    indoor and outdoor locations such as city centres, central business districts or sports arenas.

    Operators can achieve this by supplementing their macro network by deploying small cells in dense locations.

    However, deploying small cells is a complex and expensive exercise as operators may encounter many

    challenges such as identifying appropriate locations for installations; providing the necessary backhaul, network

    and traffic planning; and minimising opex associated with large numbers of small cells. Mobile operators can

    also address the coverage issue for voice by implementing the VoWi-Fi service and support seamless call

    handovers between the LTE network and Wi-Fi, and vice-versa. By allowing customers to use the Wi-Fi access

    network for voice calls, operators can also reduce pressures on the LTE bandwidth and capacity. Admittedly,

    VoWi-Fi solutions only address the coverage issue from the voice service perspective, and operators will still

    need to deploy small cells to tackle the broader issue of coverage for data services.

    The launch of the new iPhone 6 with iOS 8, which supports VoWi-Fi (and VoLTE), strengthens the confidence

    of operators in rolling out the service and increases the chances of accelerating the service take-up.

    Both Three UK and T-Mobile USA have live VoWi-Fi services, and more American operators such as AT&T

    and Verizon have announced plans to launch the service to complement their VoLTE plans.

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    9/13

     | 8

    © Analysys Mason Limited 2015 Vendor solution overview – Polystar Group

    5. Vendor solution overview – Polystar Group

    It is clear that the launch of VoLTE is not without challenges. To successfully launch VoLTE/VoWi-Fi, it is

    essential for operators to build partnerships with vendors that can offer the necessary tools, capabilities and

    resources to ensure that the investment objectives are met, and the service is delivered with the required level of performance. Among many vendor options available in the marketplace, one vendor is the Polystar Group.

    Polystar Group offers a complete range of solutions to support the entire lifecycle of VoLTE, including service

    deployment, validation and testing, service assurance, growth and monetisation. Polystar’s solutions have been

    specifically designed to minimise the risk of service launch, enable rich services to be delivered and ensure that

    customer experience is optimised.

    Polystar’s solutions enable: 

      Operators to rapidly launch VoLTE/VoWi-Fi services

      Validation and verification of VoLTE/VoWi-Fi

      Real-time service assurance for VoLTE/VoWi-Fi

      Actionable intelligence to enhance customer service.

    Figure 5.1:Polystar solution

     [Source: Polystar, 2015]

    Network and Customer Insight solutions5.1

    The Network and Customer Insight solutions enable operators to monitor the overall performance of the VoLTE

    network. Operations personnel and engineers can obtain an end-to-end view of the network through a wide

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    10/13

     | 9

    © Analysys Mason Limited 2015 Vendor solution overview – Polystar Group

    range of KPIs and parameters, presented in the form of clear visual dashboards and displays. The dashboards

    offer high levels of flexibility allowing users to modify existing reports and to create dashboards of their own.

    The solution consists of both probes and call-trace applications. It supports all relevant signalling and

     protocols/interfaces for VoLTE/VoWi-Fi, including IMS. The solution provides detailed, real-time insight from

    the network, enabling operators to detect and act on potential network issues with a minimum of delay.

    Additionally, all monitoring is performed with the same components, allowing for easy correlation of signalling

    across different interfaces.

    Operators can use the Network and Customer Insight solutions in tandem to quickly troubleshoot emerging

    network problems that could impact VoLTE/VoWi-Fi services. Upon discovering KPI threshold breaches on the

    dashboards, operations personnel can drill deeper to view granular network level information captured by the

     probe. The ability to gain an end-to-end network view as well as deeper network insight enables operators to

    effectively monitor and troubleshoot VoLTE and VoWi-Fi services.

    Solver5.2

    Implementing VoLTE with SRVCC is a complex process because existing networks and nodes require upgrades

    and configurations to support new functions. New nodes and functions also need to interact seamlessly with

    existing ones and a multi-vendor network environment adds further complexity to the challenge. By planning

    and executing a thorough test strategy, operators can minimise the risks of failure.

    Figure 5.2: Validation

    test methodology

     [Source: Analysys Mason

    and Polystar, 2015]

    Performing tests with real terminals (user equipment) can be a time-consuming task. By using simulated

    terminals and a simulated RAN, the functions in the core network can be validated much faster. In the first

     phase of the implementation, it is sufficient to simulate a few users as the volumes are enough to test basic

    functionality. The second phase of the testing could include several hundreds of users, to validate all the

    network functions to ensure end-to-end functional compliance. This phase will form the crux of the validation

    strategy as it will include testing of the numerous legacy network functions that have been upgraded to support

    SRVCC. The final phase will focus on a full system load test to make sure that all network nodes and functions

    deliver the planned capacity. Quality measurements for voice and video should be carried out during all the

     phases to determine that QoS does not degrade with increased traffic volume.

    Solver supports key IMS interfaces as defined by 3GPP, such as Mb, Ix and Iq; with support for RTP/SRTP and

    H.248 protocols, as well as voice and video quality algorithms. With Solver, operators can execute all required

    tests for a successful VoLTE and SRVCC implementation from a single platform. Using the intuitive user

    interface, test cases can be built and executed within minutes and without the need for extensive training.

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    11/13

     | 10

    © Analysys Mason Limited 2015 Vendor solution overview – Polystar Group

    ODIN5.3

    ODIN is an out-of-the-box software platform that provides a cost-efficient alternative to the expensive IMS,

    enabling operators to quickly launch VoLTE and VoWi-Fi services. It is also future-proof because, if and when

    the operator decides to deploy a complete IMS platform, ODIN can assume the role of an application server in

    the IMS network. It is fully virtualised, running on commodity hardware, offering flexible deployment options,either on-premise or delivered from the cloud. Because ODIN comes as a single node, it requires minimal

    integration, costing much less to integrate into the network environment than traditional IMS solutions. In

    addition, the integration of ODIN requires significantly less time.

    Odin is compliant with a range of 3GPP standard interfaces, including MAP, CAPv2, Cx, Dx, Sh, Gy, SIP (IMS

     profile) and ISC. It can be integrated into the core network as a standard SS7 node, combined S-CSCF and AS

    or as a standalone IMS AS. This flexibility provides a smooth deployment capability with a clear evolution path

    should the core be upgraded to support a full IMS. Currently, ODIN supports VoLTE (IR.92), VoWi-Fi,

    MMTEL, SRVCC and Service Centralisation and Continuity. Figure 5.3 and 5.4 depict the pre-IMS and post-

    IMS deployment scenarios of ODIN.

    Figure 5.3: ODIN pre-IMS

     [Source: Polystar, 2015]

    Figure 5.4: ODIN post-IMS

     [Source: Polystar, 2015]

    Post-IMS

    Pre-IMS

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    12/13

     | 11

    © Analysys Mason Limited 2015 About the author

    About the author

    Anil Rao (Senior Analyst) is a member of Analysys Mason’s Telecoms Software research

    team and is the lead analyst for the Service Assurance programme, focusing on producing

    market share, forecast and research collateral for the programme. He has published research on

    IP probes, real-time network analytics and the importance of service assurance in reducing

    churn and improving customer experience. He holds a BEng in Computer Science from the

    University of Mysore and an MBA from Lancaster University Management School, UK.

    Published by Analysys Mason Limited • Bush House • North West Wing • Aldwych • London • WC2B 4PJ • UK  

    Tel: +44 (0)20 7395 9000 • Fax: +44 (0)20 7395 9001 • Email: [email protected] • www.analysysmason.com/research  

    Registered in England No. 5177472

    © Analysys Mason Limited 2015

    All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means –  electronic,

    mechanical, photocopying, recording or otherwise  –  without the prior written permission of the publisher.

    Figures and projections contained in this report are based on publicly available information only and are produced by the Research Division of Analysys Mason

    Limited independently of any client-specific work within Analysys Mason Limited. The opinions expressed are those of the stated authors only.

    Analysys Mason Limited recognises that many terms appearing in this report are proprietary; all such trademarks are acknowledged and every effort has been

    made to indicate them by the normal UK publishing practice of capitalisation. However, the presence of a term, in whatever form, does not affect its legal status

    as a trademark.

    Analysys Mason Limited maintains that all reasonable care and skill have been used in the compilation of this publication. However, Analysys Mason Limitedshall not be under any liability for loss or damage (including consequential loss) whatsoever or howsoever arising as a result of the use of this publication by the

    customer, his servants, agents or any third party. 

  • 8/18/2019 Analysys Mason VoLTE VoWiFi Whitepaper Mar2015 RMA01

    13/13

     | 12

    © Analysys Mason Limited 2015 About Polystar Group

    About Analysys Mason

    Research

      We analyse, track and forecast the different services accessed by consumers and enterprises, as

    well as the software, infrastructure and technology delivering those services.

      Research clients benefit from regular and timely intelligence in addition to direct access to our

    team of expert analysts.

    For more information, please visit www.analysysmason.com/research . 

    About Polystar Group

    Polystar Group enables communications service providers to achieve excellence in CEM, big data

    analytics, service assurance, network monitoring and high performance testing. Polystar helps CSPs to

    simplify their CEM strategies and drive operational efficiency through real-time network analytics.

    Polystar’s real-time Network and Customer Insights uncover a goldmine of data, which yields

    indispensable insights to CSPs. Polystar is recognised as one of the fastest-growing companies in

    Sweden. Since its inception in Stockholm in 1983, Polystar has experienced continuous and

    sustainable growth, and evolved to a global presence, serving customers in over 50 countries.

    For more information, please visit www.polystar.com. 

    http://www.analysysmason.com/researchhttp://www.analysysmason.com/researchhttp://www.analysysmason.com/researchhttp://www.polystar.com/http://www.polystar.com/http://www.polystar.com/http://www.polystar.com/http://www.analysysmason.com/research