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Voice over LTE

Market report - 10/11/2014 Voice over LTE

2014: Finally, the starting point

This report provides an insight into the Voice over LTE market.
More specifically, we shall see the rationale for using the VoLTE solution rather than keep relying on good old circuit-switch technology, and understand exactly where mobile carriers are in terms of embracing it.
We shall thus discern the challenges that operators face in choosing this solution as well as the opportunities that it represents.

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1. Executive Summary

2. Methodology
 2.1. IDATE's general methodology
 2.2. Methodology specific to this report
 2.3. Definition: what is VoLTE?

3. Deployment status: who did what?

 3.1. Deployments
 3.2. Operator strategies

 3.2.1. Early movers
 3.2.2. 2014 movers
 3.2.3. Next movers

4. VoLTE delays: why is it so complicated?
 4.1. IMS
 4.1.1. IMS developments
 4.1.2. Industry support
 4.2. eSRVCC
 4.3. Signalling
 4.4. Next steps

 4.4.1. VoLTE & Voice over Wifi
 4.4.2. Roaming VoLTE
 4.4.3. VoLTE and RCS 23

5. Device ecosystem
 5.1. Until available worldwide, VoLTE Devices are carrier specific
 5.1.1. A still limited ecosystem
 5.1.2. Apple and the question of VoLTE
 5.2. Power consumption
 5.3. LTE-only devices
 5.3.1. VoLTE enables the emergence of an LTE-only device market
 5.3.2. The M2M challenge
 5.4. Device manufacturer strategies

6. Annex: main stages of transition to VoLTE
Table 1: Quality of Service Class Identifier and LTE
Table 2: Operator launches and deployments around the world
Table 3: eSRVCC evolution path
Table 4: LTE data roaming agreements
Table 5: Operators switching off 2G
Table 6: Voice-over-LTE - interworking with common circuit-switched voice technology

Figure 1: The road to VoLTE
Figure 2: The need to support VoLTE to limit OTT threat through interoperability
Figure 3: The different steps for LTE launch from simple connectivity to advanced services
Figure 4: VoLTE configuration on iPhone 6
Figure 5: Verizon video-calling user interface (through RCS)
Figure 6: Taqua virtual mobile core solution for Wifi Calling
Figure 7: Evolution of IMS standards
Figure 8: Different eSRVCC options
Figure 9: Data and signalling growth worldwide
Figure 10: World&You brings unlimited calling and messaging abroad to Bouygues customers
Figure 11: VoLTE devices availability compared to VoLTE launch by carriers
Figure 12: Verizon LTE-only tablet Ellipsis 7 powered by Altair baseband
Figure 13: M2M development by vertical industry
Figure 14: CS fallback architecture
Figure 15: Voice-over-IMS
The VoLTE-focused activities of the following companies and organisations are reviewed in some detail in this report, either in dedicated sections, or in substantive descriptions in the relevant narrative text.

• Algιrie Tιlιcom (Algeria)
• Apple (USA)
• AT&T (USA)
• Bouygues (France)
• China Mobile (China)
• Everything Everywhere (UK)
• GSM Association (international)
• KT (South Korea)
• LG U+ (South Korea)
• MetroPCS (USA)
• Orange (France)
• NTT DOCOMO (Japan)
• SFR (France)
• SingTel (Singapore)
• SK Telecom (South Korea)
• Sprint (USA)
• T-Mobile (USA)
• Verizon Wireless (USA)
• VoLTE, a technology to transition to an all-IP world
• The search for more capacity and answering OTT threat are main VoLTE drivers
• Market status: 2014 a starting point
• VoLTE, a reality in the USA
• Why such a late adoption?
• VoLTE and Wifi calling, complementary technologies
• Device ecosystem in wait for more massive deployments
• LTE-only devices
• What comes next?
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