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Articles on this Page
- 05/30/13--09:00: _Internet Trends by ...
- 05/31/13--11:00: _Friday rant: OTT, V...
- 06/02/13--08:30: _Everything you want...
- 06/03/13--10:00: _New Carrier Type (N...
- 06/07/13--09:00: _3GPP Public Safety ...
- 06/10/13--01:00: _Summary of Network ...
- 06/16/13--09:00: _Five Future Technol...
- 06/20/13--11:30: _Economical M2M usin...
- 06/23/13--22:00: _3 Band Carrier Aggr...
- 06/29/13--08:00: _Timing Accuracy and...
- 06/30/13--06:30: _Multi-RAT mobile ba...
- 06/30/13--22:30: _Is it too early to ...
- 07/07/13--05:00: _500 Billion devices...
- 07/08/13--14:00: _Adaptive Video Stre...
- 07/09/13--06:00: _Small Cells Enhance...
- 07/11/13--05:00: _Present and Future ...
- 07/12/13--04:00: _Introduction to M2M...
- 07/15/13--12:00: _What's next with 80...
- 07/17/13--06:00: _Decision Tree of Tr...
- 07/18/13--05:00: _Our World Without M...
- 05/30/13--09:00: Internet Trends by Mary Meeker at #D11
- 05/31/13--11:00: Friday rant: OTT, Viber, Roaming, etc.
- 06/02/13--08:30: Everything you wanted to know on Cloud Encryption
- 06/03/13--10:00: New Carrier Type (NCT) in Release-12 and Band 29
- 06/07/13--09:00: 3GPP Public Safety focus in Rel-12
- 06/10/13--01:00: Summary of Network Security Conference (#NetworkSecurity) 2013
- 06/20/13--11:30: Economical M2M using LTE - #LTEWS
- 06/23/13--22:00: 3 Band Carrier Aggregation in Release-12
- 06/29/13--08:00: Timing Accuracy and Phase Performance Requirements in LTE/LTE-A/4G
- 06/30/13--06:30: Multi-RAT mobile backhaul for Het-Nets
- 06/30/13--22:30: Is it too early to talk '5G'
- 07/07/13--05:00: 500 Billion devices by 2030, etc...
- 07/08/13--14:00: Adaptive Video Streaming: Principles, Improvements and Innovation
- 07/09/13--06:00: Small Cells Enhancements for 3GPP Release-12
- 07/11/13--05:00: Present and Future Technologies for Internet of Things (IoT)
- 07/12/13--04:00: Introduction to M2M and its developments in LTE
- 07/15/13--12:00: What's next with 802.11!
- 07/17/13--06:00: Decision Tree of Transmission Modes (TM) for LTE
- 07/18/13--05:00: Our World Without Mobile :-)
Nomophobia and FOMO are a big problem and I see this day in day out working in this industry.
The slide pack which was actually posted yesterday has already crossed 550K as I write this, in just 1 day. So you can understand how eagerly awaited event this has become every year.
To download the above, click on the Slideshare icon and then you can save from Slideshare site.
If you want to watch the video of her presentation, its available on All things digital website here.
Another interesting piece of news was that Viber has launched a desktop application which means it can now rival Skype fully.
Guess what, I would think that operators have more to worry from this news than Skype. I have stopped using Skype for some time now due to many issues I have with it and have moved to Viber for a few months. If you are a regular reader to this blog then you would have read my recent post complaining about the global roaming rates. When I am travelling abroad, I make sure there is WiFi and use Viber as a substitute for Voice and SMS. In fact I can send MMS and emoticons using Viber which would cost a fortune over cellular otherwise.
Sometimes it feels like the operators are sleepwalking into their own destruction by not innovating enough and fast to be a challenge for these OTT services. Not entirely sure what the solutions are but there are quite a few ideas around to start thinking in that direction. An interesting presentation by Dean Bubley I posted here is a good starting point. Another one from him and Martin Geddes is embedded below, which is quite interesting and intutive.
Enough of my rants, what do you think about this?
I like Dropbox (even though I am still a free user) but it is used as an example in many case studies for security related to cloud. A quick search on Google and some useful links summarising the issues with Dropbox security here, here and here.
A user on slideshare recently uploaded many presentations from the Cloud Asia 2013 in Singapore here. One of the presentations that I really liked is embedded below.
The two main things from the presentation that I really want to highlight is the Worldwide compliance which can be a bit of an issue once you want to offer your service universally and the other is the different level of encryption that is required to keep the data secure. Pictures of both as follows:
Enjoy the presentation:
China Mobile, in their Rel-12 workshop presentation, have suggested 3 different types/possibilities for the NCT for what they call as LTE-Hi (Hi = Hotspot and Indoor).
Ericsson, in their Rel-12 whitepaper mention the following with regards to NCT:
Network energy efficiency is to a large extent an implementation issue. However, specific features of the LTE technical specifications may improve energy efficiency. This is especially true for higher-power macro sites, where a substantial part of the energy consumption of the cell site is directly or indirectly caused by the power amplifier.
The energy consumption of the power amplifiers currently available is far from proportional to the power-amplifier output power. On the contrary, the power amplifier consumes a non-negligible amount of energy even at low output power, for example when only limited control signaling is being transmitted within an “empty” cell.
Minimizing the transmission activity of such “always-on” signals is essential, as it allows base stations to turn off transmission circuitry when there is no data to transmit. Eliminating unnecessary transmissions also reduces interference, leading to improved data rates at low to medium load in both homogeneous as well as heterogeneous deployments.
A new carrier type is considered for Release 12 to address these issues. Part of the design has already taken place within 3GPP, with transmission of cell-specific reference signals being removed in four out of five sub frames. Network energy consumption can be further improved by enhancements to idle-mode support.
The IEEE paper I mentioned above is as follows:
Public Safety is still a hot topic in the standards discussion and on this blog as well. Two recent posts containing presentations have been viewed and downloaded like hotcakes. See here and here.
3GPP presented on this topic in the Critical Communications World that took place last month. The following is from the 3GPP press release:
A presentation and video from that event is embedded below:
For more details see here.
You can read more on these topics on Cisco blogs.
Next is the self-healing technology:
These will go very well with phones where you can spray paint phone covers and maybe if its possible to dissolve the skin and re-use it, it would be an added bonus.
Just think how the technology used to design Robots can enable flexible phones and other devices.
With sensors becoming smaller and cheaper, more of them are being put in our devices. Many years back people were saying that breath analysers could be available in mobiles but I guess there wasnt a business case for that. Also many of these sensors have come as part of Bluetooth add-ons to keep the cost/weight/size of the device down. Now there is a possibility of whole new range of sensors coming to our devices.
You can read more details on this here.
Finally, there is always one user who would ask me why is there no mention of LTE in the videos above so here is a **bonus** video.
I have to mention that this didnt sound very convincing to me as a selling point. Its like back in the year 2000, 3G was being sold as an enabler to the must have 'Video calling'.
So it looks like in the latest 3GPP RAN meeting finally more than 2 carriers have been proposed for Carrier Aggregation. The TDoclist has a few items on 3 carriers for CA. In some cases its been specified that there is 1 uplink component carrier (1UL CC) but in other cases its not specified and I have not looked into details. Its good to finally see more than 2 carriers being discussed.
Rohde&Schwarz have explained in one of their whitepapers about the numbering of CA bands.
Finally, If you want to learn more about Carrier Aggregation (CA) or other LTE-Advanced features, my article from last year, here, would be useful.
If you are interested in learning more on this topic or discussions, I would recommend joining the Phase Ready Linkedin group.
here) as opposed to the 2G/3G traffic.
text book picture and the often touted 'flat' architecture. Andy did mention that they see a ping latency of 30-50ms in the LTE network as opposed to around 100ms in the UMTS networks.
Mark Gilmour was able to prove this point practically.
Here is the complete presentation:
While LTE/LTE-A (or 4G) is being rolled out, there is already a talk about 5G. Last week in the LTE World Summit in Amsterdam, there was a whole track on what should 5G be without much technical details. Couple of months back Samsung had announced that they have reached 5G breakthrough. In my talk back in May, I had suggested that 5G would be an evolution on the Radio Access but the core will evolve just little. Anyway, its too early to speculate what the access technology for 5G would be.
Ericsson has published a '5G' whitepaper where they talk about the vision and why and what of 5G rather than going into any technical details. It is embedded below:
John Cunliffe from Ericsson is widely credited for making the statement 50 Billion connected devices by 2020. Recently he spoke in the Cambridge Wireless and defended his forecast on the connected devices. He also provided us with the traffic exploration tool to see how the devices market would look up till 2018. Here is one of the pictures using the tool:
In terms of Cellular connectivity, we are looking at 9 Billion devices by 2018. The interesting thing to notice is that in 2017, there are still some 4 Billion feature phones. While in the developed world our focus is completely on Smartphones, its interesting to see new and existing SMS/USSD based services are still popular in the developing world. Some months back I heard about Facebook developing SMS/USSD based experience for Feature phones, I am sure that would attract a lot of users from the developing world.
One thing missing from the above is non-cellular connections which will make bulk of connectivity. Wi-Fi for example is a major connectivity medium for tablets. In fact 90% of the tablets have only WiFi connectivity. Bluetooth is another popular method of connectivity. While its mostly used in conjunction with phones, it is going to be a popular way of connecting devices in the Personal Area Network's (PAN's). So its no surprise that we will see 50 Billion connected devices but maybe not by 2020. My guess would be around 2022-23.
This process of adaptation could be improved based on the quality of coverage at any particular time.
Interdigital are proposing a further enhancement of improving the adaptation further based on the User behaviour. If for example the user is far away then the quality need not be great on the device. On the other hand if the user is very close-by, the quality should be as good as it can get. They have explained it in a whitepaper for whoever is interested here.
A video showing this method is embedded below:
The following presentation is by 3GPP in the not so long ago, Small Cells World Summit 2013.
Complete slides are embedded below and if you like to see the video, its available here.
LTE Innovation Summit 2013 - Anandamoy Sen from Rohde & Schwarz on Vimeo.
An interesting video on Introduction to M2M and its developments in LTE from Rohde&Schwarz LTE Innovation Summit 2013.
The presentation is also embedded below and can be downloaded from Slideshare.
From another brilliant presentation by R&S from their LTE Summit 2013. Last year I had a similar overview from Agilent here. This one is much more detailed on what's coming next for WiFi.
4G Americas have recently published whitepaper titled "MIMO and Smart Antennas for Mobile Broadband Systems" (available here). The above picture and the following is from that whitepaper:
Figure 3 above shows the taxonomy of antenna configurations supported in Release-10 of the LTE standard (as described in 3GPP Technical Specification TS 36.211, 36.300). The LTE standard supports 1, 2, 4 or 8 base station transmit antennas and 2, 4 or 8 receive antennas in the User Equipment (UE), designated as: 1x2, 1x4, 1x8, 2x2, 2x4, 2x8, 4x2, 4x4, 4x8, and 8x2, 8x4, and 8x8 MIMO, where the first digit is the number of antennas per sector in the transmitter and the second number is the number of antennas in the receiver. The cases where the base station transmits from a single antenna or a single dedicated beam are shown in the left of the figure. The most commonly used MIMO Transmission Mode (TM4) is in the lower right corner, Closed Loop Spatial Multiplexing (CLSM), when multiple streams can be transmitted in a channel with rank 2 or more.
Beyond the single antenna or beamforming array cases diagrammed above, the LTE standard supports Multiple Input Multiple Output (MIMO) antenna configurations as shown on the right of Figure 3. This includes Single User (SU-MIMO) protocols using either open loop or closed loop modes as well as transmit diversity and Multi-User MIMO (MU-MIMO). In the closed loop MIMO mode, the terminals provide channel feedback to the eNodeB with Channel Quality Information (CQI), Rank Indications (RI) and Precoder Matrix Indications (PMI). These mechanisms enable channel state information at the transmitter which improves the peak data rates, and is the most commonly used scheme in current deployments. However, this scheme provides the best performance only when the channel information is accurate and when there is a rich multi-path environment. Thus, closed loop MIMO is most appropriate in low mobility environments such as with fixed terminals or at pedestrian speeds.
In the case of high vehicular speeds, Open Loop MIMO may be used, but because the channel state information is not timely, the PMI is not considered reliable and is typically not used. In TDD networks, the channel is reciprocal and thus the DL channel can be more accurately known based on the uplink transmissions from the terminal (the forward link’s multipath channel signature is the same as the reverse link’s – both paths use the same frequency block). Thus, MIMO improves TDD networks under wider channel conditions than in FDD networks.
One may visualize spatial multiplexing MIMO operation as subtracting the strongest received stream from the total received signal so that the next strongest signal can be decoded and then the next strongest, somewhat like a multi-user detection scheme. However, to solve these simultaneous equations for multiple unknowns, the MIMO algorithms must have relatively large Signal to Interference plus Noise ratios (SINR), say 15 dB or better. With many users active in a base station’s coverage area, and multiple base stations contributing interference to adjacent cells, the SINR is often in the realm of a few dB. This is particularly true for frequency reuse 1 systems, where only users very close to the cell site experience SINRs high enough to benefit from spatial multiplexing SU-MIMO. Consequently, SU-MIMO works to serve the single user (or few users) very well, and is primarily used to increase the peak data rates rather than the median data rate in a network operating at full capacity.
Angle of Arrival (AoA) beamforming schemes form beams which work well when the base station is clearly above the clutter and when the angular spread of the arrival is small, corresponding to users that are well localized in the field of view of the sector; in rural areas, for example. To form a beam, one uses co-polarized antenna elements spaced rather closely together, typically lamda/2, while the spatial diversity required of MIMO requires either cross-polarized antenna columns or columns that are relatively far apart. Path diversity will couple more when the antennas columns are farther apart, often about 10 wavelengths (1.5m or 5’ at 2 GHz). That is why most 2G and 3G tower sites have two receive antennas located at far ends of the sector’s platform, as seen in the photo to the right. The signals to be transmitted are multiplied by complex-valued precoding weights from standardized codebooks to form the antenna patterns with their beam-like main lobes and their nulls that can be directed toward sources of interference. The beamforming can be created, for example, by the UE PMI feedback pointing out the preferred precoder (fixed beam) to use when operating in the closed loop MIMO mode TM4.