Category: Uncategorized

Today, I noticed a report on Teltarif that Vodafone Germany is looking into buying Kable Deutschland, one of the big German cable Internet (and TV) providers. It is speculated that the price would be around 2.5 billion euros. Quite a bit of money and yet another impressive indication that mobile only networks are a thing of the past. Both Vodafone and Telefonica O2 are already offering DSL services in Germany today but I guess those activities would pale against buying a cable operator. In my opinion, having strong fixed and wireless assets is a must to offer an all in one communication solution to private customers for both home and while they are away. And I guess femtocells / home gateways with 3G and Wifi built-in together with local IP access from 3G mobile phones would be an important part of such a strategy.

Sorry for not linking to the original article, I posted this entry from my mobile phone.

Do you know Space Invaders and the artist that puts them on walls in many different cities? If not you might want to have a look here. So what does this have to do with mobile and wireless? Looks like somebody has now started to add another dimension to this with 2D barcodes. If you have a mobile phone with a 2D barcode scanner, take a look at this picture, click on "full screen resolution'" to increase the size of the 2D barcode and point your mobile towards the screen for the application to decode the barcode. Very interesting result… 🙂

Found via the Paris picture stream in Jaiku. Social networking at its best!

Things can be simple when it comes to prepaid SIMs. You walk into a supermarket, get a
SIM and 2 minutes later you are set. Not so with mobile operator '3' in
Italy.

When I wanted to buy a prepaid SIM card from them this week they refused to sell me one. In the first store I went to at Roma Termini station, the shop assistant first doubted that it would work in my non Italian mobile phone. Once we cleared that they refused to accept my German identity card, which by the way is good enough for customs and for boarding airplanes as a valid identity. Hm, but not for buying a SIM card!? Ridiculous.

So in the afternoon, I went to another store in downtown Rome which was on my way, this time equipped with my passport. Just to make sure. Here, the same story again but I made it up to the Italian tax number, which they say is also required. I have one so I gave it to them. However, they insisted that they would only accept it on an official document. Again, no SIM card from me.  Ridiculous.

I have to say I am baffled. I could have understood one shop assistant being a bit difficult, but two in two different stores!? Note that this is a only a '3 Italy' attitude. Some days ago I got a SIM card from mobile operator WIND, my id card was good enough and no Italian tax number was required. Same with Vodafone Italia just three months ago just around the corner from the 3 store and I was not the only foreigner buying a prepaid SIM card while being there. As a matter of fact, I had to take a number and stand in line. Guess where the money is going.

Anybody in '3 Italy' reading this blog? Hello! Wake-up! How many millions of visitors are coming to your country each year who could be your customers!? Hm, but maybe that's one of the reasons why your market share is below 10%…

Scott over at the Mippin blog is hosting the Carnival of the Mobilists this week. As always, lots of interesting posts from various blogs from all over the world on wireless topics. Scott has selected Andrew Grill's "Ask, don't tell: The golden rule for mobile advertising 2.0" as best post of the week. Good choice, I can't wait to be asked 🙂 For this and more, head over and enjoy.

A friend of mine pointed me to this document which gives an overview of which portions of frequencies have been allocated to which mobile operators in Europe. I've been looking for such a document for quite a while now as it can give interesting insights into which options mobile operators in Europe have when it comes to frequency bands in Europe. Here's what I think:

The 900 MHz band

In total, there are 35 MHz available in this band, which are typically shared for GSM today by two to four operators. Even if only two operators use this band, each operator has typically less than 10 MHz of consecutive bandwidth available here. For LTE that means that the best that an operator can do in this band is to deploy a 5 MHz LTE carrier. For most operators, that's unlikely though as the remaining 900 MHz chunks they already own are probably not enough to ensure GSM in-house coverage with enough capacity. So, most operators could only deploy a 1.25 MHz LTE carrier in this band. I wonder if that's attractive as the achievable bandwidth is severely limited. But maybe for deep in-house coverage, it's better than nothing!? Also, there's no possibility to buy additional chunks in this "prime" band, it's all allocated.

The 1800 MHz band

This game is a bit different as in total, 75 MHz were assigned to GSM here and many "second wave" GSM operators in Europe got assigned chunks of more than 10 MHz. Also, in many countries, not all of the 75 MHz have been sold so some operators might be thinking of acquiring some of the so far unused chunks to start with a 5 MHz or 10 MHz LTE carrier here.

The 2100 MHz band

This is the 3G UMTS band in Europe with a total of 60 MHz. In most countries, each operator has a 10 MHz chunk and probably only uses 5 MHz of that for a single 3G carrier. Also, there is some of that bandwidth still available, e.g. due to alternative 3G carriers having given up after they paid a bit too much for the licenses back in the year 2000. So scenarios for this band could be that some operators will start with a 5 MHz carrier in this band or try to by additional spectrum to be able to operate a 10 MHz carrier. Since there is not enough bandwidth left for all, let's see if a price fight breaks out again like in the early 3G days. Doubtful but I see more interested parties then available chunks.

The 2600 MHz band

In most countries, this part of the spectrum is still up for grabs. The issue here is that in-house coverage would be even more difficult to achieve than with the 2100 MHz band. Lots of space for 10 MHz+ carriers.

Do 5 MHz carriers make sense?

This is the big question. With MIMO, the performance of LTE with a 5 MHz carrier is similar as HSPA+ with MIMO. Even if operators do not choose to upgrade their HSPA networks to MIMO, I wonder if the speed difference is big enough to justify the expense to go to LTE compared to upgrading their already existing HSPA base station with a second carrier.

Multiband Devices

So there are four frequency options for LTE in Europe: 900, 1800, 2100 and 2600, each with benefits and drawbacks. Different operators will surely have different strategies, including using several bands at once, so it's likely that single band LTE devices are likely not to be a winner. Supporting all four frequency bands with MIMO, which requires at least two antennas per band in a single device, however, is going to be difficult to achieve. And on top of that we haven't even talked yet about the 700, 850, 1900 MHz band in the US.

I guess both first movers and followers in this space will have difficult choices to make when it comes to frequency bands. As always, comments are welcome.

Despite having been quite a skeptic a couple of years ago when it came to Instant Messaging (IM), I have realized these days that I have fully integrated IM into my working and private life and today I wouldn't want back. In fact, if somebody calls me on Skype these days without sending an IM first to ask if I am available or to let me know what it is about, it feels a bit strange, almost like an intrusion.

Communicating with IM people

I usually don't call people on the phone that regularly use IM. In most cases the questions I have can be answered in a few words. No need to call and 'hard interrupt' the other person or myself. To me, IM seems more like a 'soft interrupt' with the option to ignore for a little while to finish something else first. I can even continue my work and once I have the answer I can quickly go back and fill in the gaps, if the task at hand permits.

While the amount of incoming and outgoing messages remain reasonable, I can get answers and answer questions myself pretty much on the fly without fully interrupting the main task I am doing at the moment. Much more efficient than making a phone call for both parties involved.

I can also see right away when somebody is busy or not available. So instead of calling and leaving a voice mail, I can set a 'notification event' in my messenger so I don't have to guess when the other person might come back or waste time in trying to call.

Communicating with Non-IM people

Seeing people being present gives me a sense of connectedness and the reassurance that I can quickly get help or advice when necessary. With people that are not connected, however, my business practice is quite different. Here, the only way to contact them is by phone or e-mail. While e-mail is definitely less intrusive than IM, you never know when the other person reads it or when he will answer it. And making a phone call will definitely interrupt whatever the other person is doing or I might not be able to reach him at all. It feels a bit like walking in the dark or playing the lottery.

No mobile-IM yet

What I haven't come around to using yet is IM on my mobile phone. Not that it's a technical issue, there are enough mobile IM clients available. Maybe that's because I also don't read my business e-mails on a mobile device since my questions and answers I get/send by e-mails are usually longer than what small keyboards, screens and not being able to look up things in documents, support. Or maybe I just don't want to be bothered while in transition!?

Interesting though how many of my friends, co-workers and customers are using mobile-IM these days, even those that generally questioned the usefulness of Internet access from mobile devices a couple of years ago.

So my question to you is: How do you feel about / use IM today?

P.S.: Have you noticed that almost everyone now uses an avatar (picture) in their IM program. I wonder how that happened!?

While ATM is used as a transport technology in backhaul and core networks for UMTS and ADSL today it looks like the technology is pretty much on the way out in next generation networks. In LTE for example, ATM no longer plays a role, everything is specified only down to the IP layer. The technology used below is up to the network operator. In many cases this will be Ethernet over copper (e.g. VDSL), fiber or Ethernet microwave.

Another example is the VDSL deployment of Deutsche Telekom (DT) in Germany. According to heise magazine 22/08, DT uses Ethernet over a Gigabit fibre (802.3ah) to their outdoor VDSL DSLAMs. Ethernet is also used over the last few meters of copper cable to the customer instead of ATM. While the VDSL modems can still do ATM, DT has decided to use Ethernet in combination with VLAN (Virtual LAN) encapsulation (802.1q). At the moment, only VLAN-ID 7 is used for all kinds of data, but there are rumors that DT plans to use several VLAN-IDs to separate IPTV from normal Internet access in the future with their IADs (Integrated Access Devices) that support Internet access, IPTV and (SIP) telephony.

Recently, while in the dentist’s waiting room I had a bit of time to read another article from the always very interesting Ericsson Review Magazine. In the 2/2008 issue there are lots of articles on IMS. In the article on delivering the optimal end-user experience, the authors describe that their IMS application environment allows to share with other users which IMS applications one is using. This way, one can not only see if it is possible to use a specific application to communicate with someone but it’s also possible to see which applications others are using and thus to discover new services. Kind of a viral marketing approach.

I haven’t read about this in any IMS articles so far and it strikes me as a good idea, not only for the IMS domain. From the article, it’s not quite clear if this is something proprietary of the Ericsson IMS client environment or something that was standardized in 3GPP or OMA. If this is part of an IMS standard and you know where to find it, please leave a note in the comment section.

Unified Communications – The holy grail of combining information technology and telecommunication. There are lots of different opinions on what exactly UC is and when I was offered to have a look at a book giving an introduction, I couldn't resist.

Unified Communication Solutions – A Practical Business and Technology Approach by David Kim, Michael Gibbs and Bob Decker, published by Nortel press, approaches the topic in four steps. The first part of the book introduces the reader to how the evolution and integration of messaging, voice telephony and business applications forms a Unified Communication Solution. Business processes are streamlined with UC by making business applications interact directly with each other and by improving the interaction between people working on a common project and goal.

The second and third part of the book then show how UC can be used to enhance business processes such as Customer service, Customer relationship management, Supply chain management, enterprise resource planning and sales force automation. Quite a thorough analysis which not only discusses UC but also gives an overview of how companies are run.

UC is not a low hanging fruit, as lots of thought has to go into how to introduce UC applications into business processes and how to secure them. By tying information and communication together, new angles of attack for the bad guys emerge and the final chapter of the book gives an introduction of how to secure VoIP, SIP and UC solutions.

Personally, I've been using some of the UC elements described in this book for a couple of years now. Take my VoIP soft-phone and the IPsec VPN software on my PC for example. I can't remember when I last used a desktop phone as I find headphones and a proper address book for phone numbers navigated with the mouse much more convenient than anything a desktop phone could offer. This has opened totally new ways of working to me as I am no longer bound to a specific place but can do my work from pretty much anywhere where an Internet connection is available. Over an encrypted IPsec tunnel my e-mail, SIP telephony and corporate IM work just as well as at my desk in the office, which I rarely use these days.

Thanks to 3.5G networks now common pretty much everywhere I go, I don't even have to worry much anymore about how to connect. The first question of many callers these days is 'Hey Martin, where are you today', because they know I travel a lot or work from home and simply can't tell the difference from the connection or the caller ID of whether I am in the office or somewhere else. That's UC in action.

What I am still missing in my personal setup is the proper integration of voice telephony in my business applications, i.e. in Microsoft Office and Outlook. But then, what would the world be without some room for improvement?

While the book talks about mobile devices in some places, it's clear that this is not really the authors domain and I think this part of UC was treated a little bit too lightly in the book. (Yes, I know, I work in the mobile domain, so that comment had to come…). Another area that I wished were a bit more  discussed is Web based tools for integrating communication functions into programs and web applications for communication inside the company and with the customers.

All in all, a great book and I managed to read it in about a week. In total, the book has 17 chapters and each can be read in 30 – 60 minutes. That's just the right time that can be set aside every now and then before other matters require attention or that train you are sitting in arrives at where you want to get off.

A quick note to point you to the Carnival of the Mobilists, this week over at VoIP Survivor. An incredible amount of posts are featured this week, they should keep you busy for a while 🙂