Full Article: iFlood – How better mobile user interfaces demand Layer Zero openness

Networks guru Andrew Odlyzko recently estimated that a typical mobile user consumes 20MB of data a month for voice service, but that T-Mobile Netherlands reports their iPhone users consuming 640MB of data a month; so upgrading everyone to the Jesus Phone would increase the demand for IP bandwidth on cellular networks by a factor of 30.

It had in the past been estimated that major European cellular operators might be able to provide 500MB/user/month without another wave of network upgrades; if this calculation is at all typical, it looks like there is a substantial risk of an ”iPlayer event” hitting cellular in the near future. Recap: when the BBC placed vast amounts of its content on the Internet through its iPlayer service, DSL traffic in the UK spiked; or rather, it didn’t spike, the trend shifted permanently upwards.

That, of course, is much more worrying; because the marginal costs are set by the capacity needed to handle the peaks, a rise in average traffic means a boost to costs multiplied by the peak/mean ratio. An aggravating factor is the pricing structure for BT Wholesale backhaul service – the commits are 155Mbits/s, so if the new peak demand just exceeded your existing commit, you needed to buy a whole 155Mbits/s pipe. The impact on the UK unbundling/bitstream ISPs has been serious and the sector remains in a critical condition.

Traditionally, a mobile base station was provisioned with 2 E-1 leased lines, 2×2 Mbit/s capacity. Multiplied by 4, that’s 9,676,800 Mbits in a month. Divide by 8 to convert to MB, 1,181GB/1.15TB a month. Which means that a typical cell site could support at the most 1,832 users’ activity, or quite a lot less when you consider the peak/mean issue – typical values are 4:1 for GSM voice (458 users), but as high as 50:1 for IP (36!). Clearly, those operators who have had the foresight to pull fibre to the base stations and, especially, to acquire their own infrastructure will be at a major advantage.

The elements of traffic generation

The iPlayer event was an example of content push – what changed was the availability of a huge quantity of compelling content, which was also free. If Samsung’s recently announced video store takes off, that would be another example of content push. But this is far from the only driver of traffic generation, though. It is important to realise that the Internet video market is a tightly-coupled system. The total user experience is made up of content, of the user interface, of feedback and discovery mechanisms, of delivery over the network, and of the business model. All of them are very closely related – if the product is heavily DRM-restricted, prettying up the front end doesn’t help.

It is characteristic of a coupled system that the slowest-changing factor is the main constraint, but the fastest-changing factor is the driver of change. In this case, the slowest-changing factor is the infrastructure, and within that, the digs and poles of layer zero. Even the copper changes faster than that. The fastest-changing factor is the user interface, which can be changed at will. Sociability, discovery and the like, which require serious software development, are in the middle, with issues like BT Wholesale pricing some way below.

There was not much special about the iPhone technically; the first ones were 2G devices in a 3G world, and good luck to you trying to pull 640MB a month on GPRS alone. Is that even possible? Its integration with iTunes gave it access to content, but the cost issue meant that the bulk of the music on iPhones was probably downloaded over WLANs or sideloaded from a PC. But one thing that it did do very well was the user interface; Apple exploited its historic speciality in industrial design and GUI design to the limit. Typically, a lot of geeks and engineers scoffed at the gadget as an overdesigned bauble for big-kid hipsters; fools that we were.

But the core insight of the iPhone designers was to design for the Web and for rich media, probably helped by not having a telephony background. Therefore, they chose to cover as much of the form factor with a high quality screen as possible, and worked from there. They also made some advances in the GUI (zooming, gesture recognition), but the much talked about browser was less sensational. (Like all versions of Safari, it is based on the open-source WebKit engine that also makes the Nokia browser and Konqueror work.)

So we’re now beginning to see that changing the user interface can radically impact the engineering and economics of the network; and because it is a fast-changing element, it can do so faster than the network layer can react.

From receiving to sending

The Internet is a copying machine, they say; more to the point, it is usually a one-to-many medium that is experienced as a many-to-one medium. I draw content from many different sources according to the stuff I like; but each source is broadcasting itself to many readers. As a rule, people read more than they write, even if P2P distribution blurs this. One criticism of the iPhone is that it’s optimised for passive consumption of content; some users report their uplink/downlink ratio changing dramatically on changing to the iPhone.

Looking at another online-video sensation which hammers the ISP economy, YouTube, it’s quite clear that another driver of traffic is improved content ingestion. As whatever you place on the Web will be written relatively few times and read many times, there is a multiplier effect to anything that makes it easier to create or at least to distribute content.

YouTube’s innovation was three-fold; it made it dramatically simpler to upload video to the Internet, and it made it dramatically simpler to popularise it once it was there, through the embedding process and through its social functions. This latter feature meant there was much more of an incentive to upload stuff in the first place, because it was more likely to get viewed.

Better user interfaces and social mechanisms for content creation, then, are potentially major drivers of change in your cost model. They can change very quickly; and their impact is multiplied. Already, I can uplink photos to Flickr faster from my Nokia E71 than from my DSL link; granted, this is because of the UK’s lamentable infrastructure, but it shows some idea of the possibilities. Perhaps that Samsung device with the mini-decks might be less silly than we thought?

Faster adaptation: considered helpful

As we were wondering what would happen to the cellular networks’ backhaul bills, and contemplating the wreck of the DSL unbundler/bitstream business model, we looked enviously across the Channel to Telco 2.0’s favourite ISP, Iliad. They have just announced another set of fantastic figures; their margins are 70%-80% where they have deployed fibre, and their agility in launching new services doesn’t need to be rehearsed again. They even built their own content-creation service, after all; no fear of the future there.

What makes the difference? Iliad has always been committed to investing in engineering and infrastructure, giving it the agility to match the speed of change the application layer can achieve. It’s been determined to realise the OPEX and unbundling/wholesale savings from fibre deployment; and Iliad’s results have demonstrated that they are real and they are enough to fund deployment.

There is a crucial element, however, in their success; in France, access to duct and pole infrastructure is a regulated product, and major cities are more than keen on selling access to their own physical infrastructures – the sewers of Paris are the classic example. If you want to fix the ISP business model, fixing layer zero is the place to start, before the next fast-changing application knocks us back into the ditch.

Conclusions

  1. The ISP/telco market is a closely coupled system: An analysis in terms of differential rates of change shows that rapidly changing applications and user interfaces can have seismic impact on slowly changing network operator business models
  2. The benefits of fibre are real: Iliad is showing that fibre deployment isn’t just nice to have, it’s saving the ISP business model
  3. Open access to infrastructure is vital: There is no contradiction between applications/VAS and layer zero – instead they go together. If you want fantastic new apps, pick up a shovel.

Full Article: Online Video Usage – YouTube thrashes iPlayer, but for how long?

Online Video consumption is booming. The good news is that clearer demand patterns are beginning to emerge which should help in capacity planning and improving the user experience; the bad news is that an overall economic model which works for all players in the value chain is about as clear as mud.

We previously analysed the leffect of the launch of the BBC iPlayer on the ISP business model, but the truth is that, even in the UK, YouTube traffic still far outweighs the BBC iPlayer in the all important peak hour slot – even though the bitrate is far lower.

Looking at current usage data at a UK ISP we can see that the number of concurrent people using YouTube is roughly seven times that of the iPlayer. However, our analysis suggests that this situation is set to change quite dramatically as traditional broadcasters increase their presence online, with significant impact for all players. Here’s why:

Streaming Traffic Patterns

Our friends at Plusnet, a small UK ISP, have provided Telco 2.0 with their latest data on traffic patterns. The important measurement for ISPs is peak hour load as this determines variable-cost capacity requirements.

iplayer_7_days.PNG

iPlayer accounts for around 7% of total bandwidth at peak hour. The peaks are quite variable and follows the hit shows: the availability of Dr Who episodes or the latest in a long string of British losers at Wimbledon increase traffics.

Included within the iPlayer 7% is the Flash-based streaming traffic. The Kontiki-P2P based free-rental-download iPlayer traffic is included within general streaming volumes. This accounts for 5% of total peak-hour traffic and includes such applications as Real Audio, iChat, Google Video, Joost, Squeezebox, Slingbox, Google Earth, Multicast, DAAP, Kontiki (4OD, SkyPlayer, iPlayer downloads), Quicktime, MS Streaming, Shoutcast, Coral Video, H.323 and IGMP.

The BBC are planning to introduce a “bookmarking��? feature to the iPlayer which will allow pre-ordering of content and hopefully time-of-day based delivery options. This is a win-win-win enhancement and we can’t see any serious objections to the implementation: for the consumers it is great because they can view higher-quality video and allow the download when traffic is not counted towards their allowance; for ISPs it is great because it encourages non-peak hour downloads; and for the BBC it is great as it will potentially reduce their CDN costs.

youtube_7_days.PNG

YouTube traffic accounts for 17% of peak-hour usage – this is despite YouTube streaming at around 200kbps compared to the iPlayer 500kbps. There are about seven times the amount of concurrent users using YouTube compared to the iPlayer at peak hour. Concurrent is important here: YouTubers watch short-length clips whereas iPlayers watch longer shows of broadcast length.

P2P is declining in importance

The real interesting part of the PlusNet data is that peak-hour streaming at around 30% far outweighs p2p and usenet traffic at around 10%. Admittedly the peakhour p2p/usenet traffic at Plusnet is probably far lower than at other ISPs, but it goes to show how ISPs can control their destiny and manage consumption through the use of open and transparent traffic shaping policies. Overall, p2p consumption is 26% of Plusnet traffic across a 24-hour window – the policies are obviously working and people are p2p and usenet downloading when the network is not busy.

Quality and therefore bandwidth bound to increase

Both YouTube and the iPlayer are relatively low-bandwidth solutions compared to broadcast quality shows either in SD (standard definition) or HD (high-definition), however applications are emerging which are real headache material for the ISPs.

The most interesting emerging application is the Move Networks media player. This player is already in use by Fox, ABC, ESPN, Discovery and Televisa — amongst others. In the UK, it is currently only used by ChannelBee, which is a new online channel launched by Tim Lovejoy of Soccer AM fame.

The interesting part of the Move Networks technology is dynamic adjustment of the bit-rate according to the quality of the connection. Also, it does not seem to suffer from the buffering “feature��? that unfortunately seems to be part of the YouTube experience. Move Networks achieve this by installing a client in the form of a browser plug-in which switches the video stream according to the connection much in the same way as the TCP protocol works. We have regularly streamed content at 1.5Mbps which is good enough to view on a big widescreen TV and is indistinguishable to the naked eye from broadcast TV.

Unlike Akamai there is no secret sauce in the Move Networks technology and we expect other Media Players to start to use similar features — after all every content owner wants the best possible experience for viewers.

Clearing the rights

The amount of iPlayer content is also increasing: Wimbledon coverage was available for the first time and upcoming is the Beijing Olympics and the British Golf Open. We also expect that the BBC will eventually get permission to make available content outside of the iPlayer 7-day window. The clearing of rights for the BBC’s vast archive will take many years, but slowly but surely more and more content will be available. This is true for all major broadcasters in the UK and the rest of the world.

YouTube to shrink in importance

It will be extremely interesting to see how YouTube responds to the challenge of the traditional broadcasters — personally we can’t see a future where YouTube market share is anywhere near its current level. We believe watching User Generated Content, free of copyright, will always be a niche market.

Online Video Distribution and the associated economics is a key area of study for the Telco 2.0 team. 

Full Article: BBC’s iPlayer nukes “all you can eat” ISP business model

The UK’s largest broadcaster finally launched its online video streaming and download service on Christmas Day. Plusnet, a small ISP owned by BT,  has provided a preliminary analysis of the traffic and the results should send shivers down the spine of any ISP currently offering an unlimited “all-you-eat” service.

The iPlayer service is basically a 7-day catch-up service which enables people who missed and didn’t record a broadcast to watch the programme at their leisure on a PC connected to the internet. The iPlayer differs from any other internet-based video service in certain key respects:

It is funded by the £135.50 annual licence fee which pays for the majority of BBC activities.

  1. The BBC collected 25.1m licence fees in 2006/7. No advertising is required for the iPlayer business model to work.
  2. It is heavily promoted on the BBC broadcast TV channels. The BBC had a 42.6% share of overall UK viewing in 2006/7 and therefore a lot of people already know about the existence of the iPlayer after one month of launch.
  3. it is a high quality service and is designed for watching whole programmes rather than consumption of small vignettes.

This is sharp contrast to the current #1 streaming site, YouTube.

A massive rise in costs

The key outputs from the Plusnet data is that in January:

  1. more customers are streaming;
  2. streamers are using more; and most importantly
  3. peak usage is being pushed up

This equates for Plusnet to streaming cost increasing in total to £51.7k/month from £17.2k, or an increase of 18.3p/user from 6.1p/user. This is a 200% cost increase in just the first MONTH of the service. If we assume that the Plusnet base of 282k customers is a representative sample of the whole UK internet universe than we can draw some interesting conclusions about the overall impact of the iPlayer on the UK internet. On the whole UK IPstream base of 8.5m the introduction of the iPlayer would equate to an increase in costs to £1.5m in January from 500k.

Despite access unbundling, ‘middle mile’ costs remain a key bottleneck

IPstream is a wholesale product from BT, with BT being being responsible for the transit of the data from the customer’s home to an interconnect point of the ISP’s choice. The ISP pays for bandwidth capacity at the point of interconnect. BT Retail acts like an external ISP in the structurally separated model. The overall effect of the iPlayer for the BT’s IPstream-based customers is roughly neutral, with the increase in revenues at wholesale (external base of 4.2m customers) being offset by the increase in costs at BT Retail (total base of 4.2m customers). Of course, this assumes no bandwidth overages at BT Retail, which probably is not the case as both BT and Plusnet have bandwidth caps. In effect, incremental cost for ISPs using the IPstream product is determined by ordering extra BT IPstream pipes which come in 155-meg bit size chunks. The option for the ISP is either to allow a degradation in performance or order more capacity.

Time to buy more pipes

We tested the bandwidth profile using Wireshark watching a 59mins documentary celebrating the 50 year anniversary of Sputnik with both streaming and P2P. The streaming traffic is easy to analyse as it comes through on port 1935, which is the port used by Flash for streaming. Basically a jitter-free screening ran on average at around 0.5Mbit/sec. Using the 155-meg ordering slice this means only around 300 people need to be watching the iPlayer at the same time (peak = 8pm-10pm) to fill a pipe. Seeing that IPstream customers are aggregated across the UK to a single point, a lot of ISPs will be thinking of the need to order extra capacity. The BBC also offers a P2P download which is of higher quality than the streaming. We managed to download the 500Mb file in just over 20 minutes at an average speed of 3.5Mbit/sec. The total traffic (including overhead) for the streaming was 231MB and for the P2P delivery was 544Mb.

Full unbundling still leaves ISPs at the mercy of backhaul costs

The story for facility-based LLU(Local Loop Unbundling) players, which account for another 3.7m UK broadband customers, is slightly different as it depends completely on network design and distribution of the base across the exchanges. Telco 2.0 market intelligence says that some unbundlers have ordered 1-gig links for the backhaul and should be unaffected least in the short term. However, some unbundlers have only ordered 100-meg links and could be in deep trouble with peak hour people really noticing the difference in experience. The only real option for these unbundlers is to order extra capacity on their backhaul links which could be extremely expensive. The average speed for someone just browsing and doing emails is quite low compared to someone sat back watching videos stream.

Cable companies understand sending telly over wires

The story for Virgin Media, which is the main UK cable operator with 3.3m broadband subscribers, is again is dependent on network design. This time it depends upon the load on the UBR(Universal Broadband Router) within the network segment. Virgin Media have a special angle to this as the iPlayer will be coming to their Video-on-Demand service in the spring, and therefore we assume this will take a lot of load off their IP network. The Virgin VoD service runs on dedicated bandwidth within their network and allows for the content to be watched on TV rather than PC. A big bonus for the Virgin Media subscribers.

Modelling the cost impact

For both cable and LLU players the cost profile is radically different to IPstream players, and it is not a trivial task to calculate the impact. However, we can extrapolate the Plusnet traffic figures to note the effect in volumes of data. We have modelled four scenarios: usage the same as in Jan 2008 (i.e. an average of 19min/month/user) rising to 1 hour/month, 1 hour/week and 1 hour/day. These would give an increase in cost of £1,035k/month, £3,243k/month, £14,053k/month and £98,638k/month respectively for the IPstream industry, only based upon Plusnet cost assumptions. Of course this is assuming the IPstream base stays the same (and they don’t just all go bust straight away!). Across the whole of the UK ISP industry, the increase in traffic (Gb/month) is 1,166, 3,655, 15,837 and 111,161 respectively. That’s a lot of data. The obvious conclusion is that ISP pricing will need to be raised and extra capacity will needed to be added. The data reinforces our belief expressed in our recent Broadband Report that “Video will kill the ISP star”. The problem with the current ISP model is it is like an all you can eat buffet, where one in ten customers eats all the food, one in a hundred takes his chair home too, and one in a thousand unscrews all the fixtures and fittings and loads them into a van as well.

A trigger for industry structural change?

An interesting corollary to the increase in costs for the ISPs is that we believe that the iPlayer will actually speed up consolidation across the industry and make the life of smaller ISPs even more difficult than it is today. Additionally because of the high bandwidth needs of the iPlayer, the long copper lengths in rural England and the lack of cable or LLU competition to the IPstream product, we believe that the iPlayer will increase the digital divide between rural and suburban UK. The iPlayer also poses an interesting question for the legion of UK small businesses who rely on broadband and yet don’t have a full set of telecommunications skills. What do they do about the employee who wants to eat their lunch at their desk whilst simultaneously watching last nights episode of top soap EastEnders?

Time to stop the game of ‘pass the distribution cost parcel’

The BBC is actually in quite a difficult situation, especially as publicity starts to mount over the coming months with users breaking their bandwidth limits and more or more start to get charged for overages. The UK licence payers expect they paid for both content and distribution when they handed over £133.50. In 2006/7, the BBC paid £99.7m for distributing its broadcast TV signal, £42.6m for its radio signal and only £8.8m for its online content. This is out of a total of £3.2bn licence fee income. I would suggest that the easiest way for the BBC to escape the iPlayer conundrum is for them to pay an equitable fee to the ISPs for distributing their content and the ISP plan comes with unlimited BBC content, possibly with a small retail mark-up. The alternative of traffic-shaping your users to death doesn’t seem like a great way of creating high customer satisfaction. The old media saying sums up the situation quite nicely:

“If content is King, then distribution is King Kong”

[Ed – to participate in the debate on sustainable business models in the telecoms-media-tech space, do come to the Telco 2.0 ‘Executive Brainstorm’ on 16-17 April in London.]