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Tuesday, August 13, 2019

How will voice be delivered on private 4G / 5G & CBRS networks? Private VoLTE?

An area I've seen little discussion about is the intersection of new private 4G / 5G networks, with voice and unified communications, UC. Most debate is about either local IoT (i.e. data) connectivity, or neutral-host / wholesale approaches for in-building or rural coverage.

But where enterprises deploy "pure" private networks aimed at employees or visitors, they are likely to want voice / telephony capabilities, plus more advanced communications capabilities. While this is already done for highly-specialised local cellular deployments for mines, military or maritime, it is much less clear how this could scale to more general enterprise users. 

Many of the existing local-cellular users are also just based on 2G/3G, for which simple circuit-switched infrastructure has been available for years (I had a client supplying softswitches for private voice with pico-cells, as early as 2006).

My view is that UCaaS, cPaaS, cloud telephony, IP-PBX & collaboration solution providers should be looking much more closely at the impact of CBRS, and its international equivalents, providing localised 4G/5G wireless in new spectrum, and neutral-host models. 

It is unclear whether enterprises will want to deploy "private IMS" solutions, cloud-based VoLTE & SMS, or use some simpler forms of wireless-capable VoIP in their own domain. There are various deployment scenarios I can see, each of which will require careful thought & focused strategies: 
  • Transition from two-way radio (eg TETRA) to cellular push to talk
  • Integration of existing UC/UCaaS/PBX with private cellular voice
  • IoT integration of realtime voice/video (for example "speak to an engineer" functions)
  • Fit with conferencing, collaboration & messaging platforms
  • Interoperability / roaming scenarios with public PSTN & mobile calling
  • cPaaS scenarios & APIs tailored for private mobile networks
  • Will private 5G networks using slicing techniques to prioritise QoS for non-3GPP VoIP?
  • For neutral hosts, how will they enable roaming telephony / messaging / other voice & video applications
  • What happens with numbering & identity?
  • Can private cellular work for contact centres?
  • Are there "IMS lite" options for enterprise, that cuts down some of the features and integration seen in telcos?
  • Is this a prime candidate for multi-tenant "VoLTE-as-a-service" cloud propositions?
I'm going to be watching this whole area more closely in coming months, as it seems to be rather overlooked, at least publicly. Given that a number of companies in the UCaaS / cPaaS space also have footholds in CBRS or mobile core networks (eg Amazon, Google, Twilio) it wouldn't surprise me if there's a lot going on beneath the surface here too....

(Please contact me if you're interested in exploring this domain, have existing solutions, or would like to engage me on private advisory work)

#5G, #cloudcommunications, #neutralhost, #UCaaS, #cPaaS, #voice, #collaboration

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