In case you haven’t made it to Barcelona for this year’s 3GSM / Mobile World Congress or in case you would like to see what you have not seen while being there, Telecom TV has put the shows they produced during the event on the web. Here’s the wrap up of day four:
As reported last week I also very much enjoyed the CTO panel which I watched live. For all their other productions during the MWC take a look here.
I had to hold back with this blog entry a bit because I wanted to get permission first to write about what I would say was the most interesting demo I’ve been invited to during the 3GSM / Mobile World Congress:
Lots of WiMAX demos where shown at this years congress and it’s good to see that 802.16e mobile devices have now reached PC-card card sizes and are close to general availability. It’s also nice to see that when the antenna is just a couple of meters away you can see data rates beyond 10 MBit/s. However, that tells you only little about how the system performs in practice when the base station antenna is a couple of blocks away on top of a building and there is interference from neighboring base stations. To go the extra step, Intel and Motorola have teamed up to show how their kit works in a real environment during this years show.
Network Setup
In just a few days, Intel has put up four Motorola WiMAX base stations on rooftops in central Barcelona which were connected to the core network via 50 MBit/s microwave backhaul equipment from Dragonwave. Each base station was equipped with 3 sectors, each on its own 10 MHz channel in the 2.5 GHz band. In total they had three channels available for the network so each base station used the same set of frequencies. The distance between the base stations was about 2 kilometers which is a bit more then what you would see in an inner city network deployment. They couldn’t choose the sites themselves and had to be happy with what they got. On the upside, there is less interference from neighboring cells then there would be in a public network since there were only 4 cells and thus there is no interference from cells further away.
Indoor Experience
Sitting comfortably in the lobby of a hotel in Central Barcelona, I first had a chat with the technical project manager responsible for the network setup. Very good to have somebody with a technical background to talk to. During our discussion I got a first impression of the network performance as there were two notebooks connected to the network, one via a WiMAX PC-card adapter and the other via a CPE (Customer Premises Equipment) box the size of a DSL or cable modem. Despite sitting in the ground floor lobby, the base station being a couple of rooftops away on the other side of the hotel, the probably heat insulated and RF absorbing windows and just using the built in antennas of the devices we still got a data rate exceeding 2 MBit/s via both the CPE and the PC-card adapter. Note that both were SISO (Single Input Single Output) devices. As even this speed is far beyond what you can make use of while surfing the web we streamed a couple of video streams being sent live from WiMAX connected vehicles touring the city. The resolution of the stream was around 320×240 pixels and with a frame rate of 30 fps and the video streams were crisp and clear. One of the notebooks also had an engineering monitor software package on it to observe lower layer performance of the PC card and it was interesting to see how the card goes through the different modulation and coding schemes from QPSK to 64-QAM as reception conditions changed.
Outdoor Experience
Later on we went outside and used Segways to speed up and down the streets with a notebook attached to it to see how the network copes with mobility. Again the video stream performance was flawless and we streamed a U.S. TV station over the Internet which is quite bandwidth hungry. But even this does not require a bandwidth beyond 5 MBit/s which was obviously not the limit of the network. When asked what the highest throughput is that can be observed in the network I was told that it is around 13 MBit/s with 64-QAM and about 1.5 MBit/s at the cell edge with QPSK ½ modulation and coding despite the fact that the cells are too far away from each other. Interesting numbers showing the direction in which we are headed once 2×2 MIMO is added and proper cell sizes are used.
Here’s a video taken and produced by Marc Wallis and Michael Ambjorn of Intel/Motorola respectively:
(copyright by M. Wallis / M. Ambjorn of Intel/Motorola)
Conclusion
I came away very impressed from the demo as the speeds were amazing. We didn’t loose the connection to the network even once during the one and a half hours sitting in the hotel and touring the city. That says a lot about the software stability of the PC-card and the network. Thanks a lot to Intel for the VIP tour invitation it was definitely the best demo I have seen during the Congress.
After four days of hyper-blogging from the Mobile World Congress I am both sad and happy that the show is over now. Well, at least for this year. Time to take a break. I hope you enjoyed the posts. Normal programming resumes over the weekend.
Ovi’s going to be a lot of things for Nokia in the future. During the congress, I’ve been looking at Ovi Share, one of the first Ovi applications, to see what the difference is to using Shozu to upload to Flickr, YouTube, etc. What Ovi does is to combine all of those services as it let’s you upload all kinds of content from pictures, videos to PDF files to Ovi to share with others. The S60 Ovi client syncs with the portal and knows the groups that have previsously been created to share content with predefined user groups or the public. Also, the client can grab recent uploads of friends and show thumbnails of their new pictures, etc. right on the phone. Very nice integration into the S60 platform. I was also quite impressed with the AJAX implementation on the desktop. Very smooth user interface to view pictures and videos and add information to uploaded material. Forwading content to other people via eMail and the like is also possible. If the Ovi Share client runs on my N93 I’ll create an account once I am back home. Could become my new content home.
I’ll leave it up for others to judge if it has been a smart move of Sony-Ericsson to use Microsoft Mobile along UIQ as an OS for their high end phones. So I have a different pitch for this story: When browsing the specs of their new Windows OS Experia X1 phone I noticed that it will come in two hardware versions: One supporting HSPA in the 850/1700/1900/2100 MHz bands and another one in the 900/1700/1900/2100 bands. The first variant is probably targeted at the US and Australian market since they have networks in the 850 and 1900 MHz bands and that one odd HSPA network of T-Mobile in 1700 MHz. The 2100 Mhz is for roaming. The second variant seems to address the European market where we might see UMTS migrating to the 900 Mhz band soon beyond the first network in Finland using this frequency. So while I am happy to see quad band HSPA support coming soon I have the feeling that the story does not end here.
I am an international traveler so Internet access anytime anywhere no matter where I am is of grate importance to me. I am glad to see that there are now chipset solutions on the market which integrate CDMA and UMTS in a single chip for notebooks. I’ve spoken to Regine Pohl of HP during the congress about this as HP has integrated Qualcomm’s Gobi platform in some of their business notebooks. For HP the advantage is that they can use the same chipset for all their notebooks worldwide while the user benefits from global seamless access no matter of the network technology. The chipset, however, is only one part of the equation, roaming agreements and affordable roaming tarrifs another. To this end, Regine said that HP is in contact with mobile operators to not only offer notebooks to their customers but also customized global access solutions. I am looking forward to this initiative to bear fruits.
Today I noticed an interesting shift in mobile phone usage behavior at the congress. Despite the mobile Internet being evangelized in the past years by many, most people still had their phone at their ears for making phone calls. This year when I look around the majority of people at the event have the phone in their hands to check eMail and browse the web. Good to see that it’s finally happening on a larger scale.
Believe it or not but I have not touched my notebook since last Sunday. The reason is simple: I leave the hotel at 7:30 in the morning and come back home around midnight. During the day carrying a notebook is simply not practicable and once back in the hotel, sleep is much more important. So as you might have noticed due to the spelling errors here and there that I’ve been blogging and picture uploading to Flickr only from the mobile phone. And it has worked very well this year. Typepad has finally managed to get their eMail posting feature straight and posts are now instantly put on the blog. So kudos to them, it works a lot better than last year. To see what others are doing and to keep myself informed, accessing the web from the mobile during the past days has been just as equally imporant. I’ve installed Opera Mini on my N93 before coming to Barcelona for the purpose and played around with it a bit before arriving in town. I’ve been a bit of a sceptic concerning Opera Mini before, being a Java application and all. However, I’ve changed my mind since as the experience of accessing standard web sites via its transcoding features is simply amazing. Especially over the crappy Yoigo network, it shows how its strenghts as it compresses web pages to something that can be downloaded even over such networks in a fly. And on the phone itself the application is very fast despite not being a native application. Might have something to do with the ARM Jazelle extension for executing Java code in hardware. So my prize for the application that gives me the best mobile experience this year goes to Opera for the Opera Mini web browser.
It has been good to meet with John Edwards of picoChip at congress with whom I’ll be holding the WiMAX course at the University of Oxford later this year together with Chris Beardsmore of Intel. Since my scope of interest in wireless ranges from layer one to the application on the top I very much enjoyed to see picoChip’s latest chip for LTE and WiMAX base stations in action. While others use Asics for the lower layer protocol handling and decoding, picoChip has designed their own chip with an ARM 9 processor and their own DSP to do the job more flexibly. The ARM processor used for the higher levels of the protocol stack runs Linux and the chip is used both for WiMAX and LTE. Looks like their solution has become quite popular as their WiMAX implementation has been chosen by testing houses as the reference design all other WiMAX companies have to test against. Chris allowed me to take a picture of their base station reference board and you can find it in my 3GSM Flickr stream on the right of the page.
It looks like somebody at HP has noticed that I think and write a lot about mobile network infrastructure so I was invited to a number of interviews with key people managing HP products for mobile network operators. One striking thought I had during the discussion with Peter Dragunas of HP was that I need to turn my view on how telcom operators and web 2.0 companies could work together totally upside down. So far I was always arguing that the relationship between the two parties is difficult at best as Web 2.0 companies go for the global audience while network operators usually only have a national view. Dealing with hundreds of mobile network operators to bring their applications to mobile is a difficult task at best that few Internet companies will try to undertake. But what if the network operators went out and created services to link their assets to Web 2.0 applications instead of the other way around? Peter gave me a practical example: Telecom Italia Mobile has created an application with HP’s help that allows people in SecondLife to get a virtual mobile phone in their virtual TIM store and then send and receive SMS and potentially also voice calls between virtual phones and phones in the real world. Quite a fascianting applicatio and it’s easy to see how TIM can make revenue with the service. Peter could not say whether the idea came from TIM or SecondLife in the first place but I think it’s a good role model for other wireless operators to think about (mobile) web 2.0.
Anyone out there with other examples of how mobile operators reach out to the web 2.0 world?