Future of Voice - Gotcha!

transcript

Future of Voice Workshop

Gotcha!

8th October 2013Dean Bubley & Martin Geddes

dean.bubley@disruptive-analysis.commail@martingeddes.com

Copyright Disruptive Analysis Ltd 2013

What could possibly go wrong?

Oct 2013

Lots of things…

Battery life Poor UX

“Which browser tab is ringing” RF coverage/interference Microphones/earpieces/headsets Security Etc.

Oct 2013 Copyright Disruptive Analysis Ltd & Martin Geddes Consulting Ltd 2013

There are trade-offs…

Oct 2013

Copyright Disruptive Analysis Ltd & Martin Geddes Consulting Ltd 2013

Call quality: elephant in the room

US – voice in focus Rural call completion Verizon/VoiceLink

UK – regulatory change New consumer

broadband metrics More than “speed”

EU – major debate “Assured services”

Gotcha!

Consumerbroadband voice

Not all broadband is created equal…Example: Two different ADSL providers in the same location, same “speed”

Great for voice Poor for voice

Copyright Disruptive Analysis Ltd & Martin Geddes Consulting Ltd 2013Oct 2013

Bufferbloat & Active Queue Management

A Recent Bad Skype Experience

B C20M/2M Cable broadband 10M/1M ADSL Business LLU

1.8M/448k ADSL – wholesale 20CN

Loss: <0.5%.Delay (one-way): 50ms-60ms, jumping to 500ms for a second or two, then back

Loss: Wandering from a typical 0%-2% up to as high as 48% for a second or two.

Delay: 50-70ms

Loss: 0.1%.Delay: 40ms-50ms

Different speeds & characteristics

B CVERY FAST

& VARIABLE DELAYFAST

& VARIABLE LOSS

SLOW & STATIONARY LOSS/DELAY

Good Experience

Bad ExperienceBad Experience

STATIO

SLOW FAST

Fastest connection had the WORST

Skype experience

Determines the chance that applications can adapt to the network

Determines which applications are feasible

Most stationary connection had the BEST Skype

experience

Voice quality depends on more than speed

Gotcha!

Enterprise &Carrier Voice

Does over-provisioning work?

Can we run a “converged” voice and data network?

How to capacity plan the system? How to measure and manage voice quality?

Other “gotchas”

Assumed substitutability of IP transport Edge/core, first/last 100 kbps, different media (they are not the same!)

Capacity planning “Residual packet service time” problem is repeated service killer

QoS Either uneconomic or ineffective; poor signalling/media interaction

Call admission control Unified Comms is brittle and prone to failure due to lack of CAC

Measurement & management “Jitter”, “bandwidth use” are not direct QoE proxies

The biggie: SLA composability

All the individual SLAs were met along the chain…

…but the voice service doesn’t work!

What’s wrong?

We don’t live in TDM land any more!

Other horrors (or opportunities…)

Ever more NAT/FW/middlebox latency & variability issues NFV/SDN may make things worse…

Internet fragmentation – islands of (non)connectivity IPv6 scaling issues on public Internet + rising routing overheads?

Audio + video processing value chain Noise cancellation + suppression interactions Multi-bearer comms; media processing in the cloud

Ecosystem shift - “climate change” - IT-isation Middle players (i.e. innovative telco suppliers) will get bought out Instability of supplier relationships

Last (but not least…)

Regulators

Get in touch

We can help you prepare for a world where voice is a feature, not a service. Find out more

Oct 2013

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mail@martingeddes.comTwitter.com/martingeddeswww.martingeddes.comNewsletter

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Future of Voice - Gotcha!

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