Smarter Cars of the Future

We all know that cars are getting smarter. Back in Oct., Google unveiled the cars that can drive by themselves. I am sure they will make our life much better and we will be able to catch on the sleep at early morning commute.

Then there were quite a few futuristic cars at the CES 2011 last month. One such video is embedded below.

The following is a summary from the an IEEE article:

Cars have been getting smarter for years, studded with suites of sensors and supporting electronics aimed at keeping them from crashing. But entertainment and convenience have rapidly caught up to safety as the impetus for new in-car electronics development. Because automakers typically spend three years developing and producing new cars—and new gadget candy to go with them—they’ve found themselves constantly playing catch-up with consumer electronics and consumer expectations. So car companies have teamed up with the makers of smartphone software platforms to integrate a spectacular array of apps designed for handsets with cars’ digital dashboards, center consoles, and speaker systems.

Take for instance Ford’s new Focus all-electric vehicle, which made a big splash at the 2011 International Consumer Electronics Show in Las Vegas last month. It features a software application called MyFord Mobile.

The app, which runs on Ford’s proprietary Sync platform and is compatible with the BlackBerry, iPhone, and Android devices, links the car with the driver’s smartphone and home computer. The software lets the driver listen to a smartphone’s music library and lets passengers watch movies or TV shows. It delivers information such as when electricity prices are at their lowest (to allow for the cheapest battery recharging) and where the nearest charging stations are. And it allows a smartphone to function as a remote control, by means of a connection to cloud-based servers. This remote communication lets the handset keep tabs on the car’s location and the batteries’ state of charge. It will also let the driver start the Focus EV from indoors on a blustery January morning, then step into a car whose seats and steering wheel are already warm. The MyFord Mobile app lets the driver remotely start the car, turn on the heater or air conditioner, or unlock the doors from anywhere in the world (including beneath the bedcovers).

And because the system differentiates one driver’s key from another’s, it presents information on the reconfigurable 4-inch screens on either side of the speedometer in the current driver’s preferred color and style. The state of charge, for example, could be shown as a percentage of the full charge, as an estimate of the remaining miles before recharging, or as a simple bar that gets shorter as the batteries’ energy is consumed. This differentiation also works for utility and entertainment options; it automatically queues up driver A’s list of radio station presets, favorite mobile apps, and preferred display options for the 8-inch center console touch screen. Because MyFord Mobile links the Focus to the driver’s handset, it can also access his or her contact list for hands-free calling and read out e-mails and texts through the car’s speakers.

Ford is trying to position itself as a technological leader in the automotive industry with MyFord Mobile and Sync AppLink Voice Control, which puts the driver in control of all the Sync system’s capabilities via voice commands, but it has stiff competition from the likes of Mercedes-Benz, Continental, and Toyota. Launched by Mercedes-Benz in November 2009, the Mbrace system, designed and engineered by Hughes Telematics of Atlanta, was the first telematics service on the market to give smartphones the power to remotely lock, unlock, or locate a car. It didn’t signal a revolution in the way the average driver interacts with his or her vehicle because when the German luxury vehicle maker offers a new technology or set of features, there is usually a multiyear wait for them to trickle down to cars whose sticker prices aren’t stratospheric.

The second generation of Mbrace debuted last September. It introduced Mercedes-Benz Concierge, which not only opens the car to information from the outside but also makes some car-based information and entertainment options portable. The Mbrace Mobile Application 2.0 gives iPhone and Blackberry users single-phone-number access to recommendations for nearby entertainment and restaurant options, directions, traffic updates, and more, whether the person is in the car or not. The concierge then sends destination information to the smartphone or directly to the in-vehicle navigation system. With the Mbrace system’s latest wrinkle, the Drive2Friend service, the driver can dictate a friend’s mobile number and the app sends a text message reporting that the driver is trying to find the person. The friend has the option of allowing his or her location to be sent back to the car via cellular triangulation.

While Ford was showing off its wares at CES, Continental was also there showcasing the Android-based AutoLinQ system, which lets the driver connect to the car in three ways.

AutoLinQ’s Mobile View lets you to send text messages to your car; the smart vehicle can text you back with information such as its location. In this demo [Flash video], a smartphone user is shown making a remote inquiry about the status of his car. Mobile View reports that the sunroof is open and offers the option to close it or ignore the warning. When he taps Close on the handset’s touch screen, the sunroof’s glass panel glides shut. This type of call-and-response vehicle update also tells whether doors are closed and locked and whether the headlights or interior lights are on. Mobile View doesn’t wait for a query to alert the driver when the alarm is triggered, the battery is depleted, the air bag has been activated, or the internal temperature of the car is too high or low. And like MyFord Mobile, it turns the smartphone into a remote control for locking and unlocking the doors, starting the engine, flashing the lights, and more.

AutoLinQ’s Home View lets you download apps and configure vehicle settings from your home computer. Clickable tabs at the bottom of the Home View screen let the car owner move through screens showing a wealth of data on the car’s status, driver preferences, navigation information, and applications that can be downloaded or fine-tuned. The status menu tells whether the ignition is on and displays the fuel and motor oil levels, the pressure for each of the four tires, and much, much more.

Car View, in AutoLinQ, is for updating features from the driver’s seat. Car View provides the same information as Home View but lets the driver use the center console touch screen to download apps on the fly that provide better control of the car and the ability to remotely manipulate electronic devices back home. An app that sends an alert when a game or match in the driver’s favorite sport is about to appear on television also gives the option to activate a digital video recorder at home, pull up a Web site featuring periodic updates about the game, or listen to play-by-play on the radio.

Continental is also designing unique apps that will enhance vehicle performance. For instance, the Filling Assistant will detect underinflated tires and notify the driver. When the driver goes to inflate the tires, the Filling Assistant will report pressure information to the driver’s smartphone and honk the car’s horn or flash its lights to indicate when a tire has enough air.

Not to be left out, Toyota, the world’s leading automaker, debuted the QNX-based Entune at CES 2011. Entune is an upgradable suite of entertainment, navigation, and information functions. "Consumers have grown accustomed to having the world at their fingertips through their mobile phones," says Jon Bucci, vice president of Toyota’s advanced technology department, who notes that putting them in the car is a natural evolution.

After downloading the Toyota Entune app to a handset and syncing it with the Toyota vehicle, the driver can begin accessing content and services, including Bing for Web navigation and OpenTable, which can make reservations at any one of 15 000 restaurants, with directions sent seamlessly to the navigation system and information appearing on the center console. Entune also lets a driver get customizable real-time traffic updates, sports, weather, stocks, and information on prices at local fueling stations. The system doesn’t forget music, which has almost always been a part of the driving experience. Entune includes Iheartradio, which delivers roughly 750 local radio stations at the touch of a button.

The tide of apps extending handset capabilities to cars will only continue to rise. ABI Research, in Oyster Bay, N.Y., reports that the number of users of automotive apps will increase from 1.4 million in 2010 to more than 28 million by 2015. And according to Global Industry Analysts, the vehicle telematics market is expected to reach US $11.2 billion by 2015.

You can read the complete article here.

In other news, Robots in future will have their own Internet and content like Wikipedia, etc. Does anyone else remember 'The Terminator'?

QoS Control based on Subscriber Spending Limits (QOS_SSL)

Quality of Service (QoS) is very important in LTE/LTE-A and the operators are taking extra efforts to maintain the QoS in the next generation of networks. They are resorting in some cases to Deep packet Inspections (DPI) based controlling of packets and in some cases throttling of data for bandwidth hogs.

The following is from a recent 4G Americas report I blogged about here:

This work item aims to provide a mechanism to allow a mobile operator to have a much finer granularity of control of the subscriber’s usage of the network resources by linking the subscriber’s data session QoS with a spending limit. This gives the operator the ability to deny a subscriber access to particular services if the subscriber has reached his/her allocated spending limit within a certain time period. It would be useful if, in addition, the bandwidth of a subscriber’s data session could be modified when this spending level is reached. This could be done depending on, for example, the type of service being used by the subscriber, the subscriber’s spending limit and amount already spent and operator’s charging models. This allows the operator to have an additional means of shaping the subscriber’s traffic in order to avoid subscribers monopolizing the network resource at any given time. Since support for roaming scenarios is needed, the possibility to provide support for roaming subscribers without having dedicated support in the visited network is needed.

Upon triggers based on the operator’s charging models, the subscriber could be given the opportunity to purchase additional credit that increases the spending limit.

The objective of this study is to provide use cases/service requirements and specs that allow:

* Modification of QoS based on subscriber’s spending limits

* Enforcing of spending limits for roaming subscribers without having dedicated support in the visited network

For further details see: 3GPP TS 22.115 Service aspects; Charging and billing (Release 11)

FlashLinq: A P2P Network For Nearby Phones

Looks like the new technologies and enhancements just keep coming.

Following from MobileCrunch:

Imagine being at a concert. As the band wraps up their last song, the lead singer takes the mic and says: “Thanks for coming out everyone! Just for being here, we’re giving you all an exclusive track from our upcoming CD. It should be available on the local wireless network… now!”

Generally, pulling off something like this would be nigh impossible. You’d need a pretty intense wireless infrastructure to handle thousands of freebie-hungry concert goers connecting at once, and then an even beefier backbone to handle the actual transfer. That’s where Qualcomm’s new localized P2P network technology, FlashLinq, comes into play.

As Qualcomm puts it, FlashLinq “enables devices to discover each other automatically and continuously, and to communicate, peer-to-peer, at broadband speeds without the need for intermediary infrastructure.”

In other words, it’ll build a wireless network between FlashLinq-enabled devices, allowing those devices to pass data (like the theoretical exclusive track mentioned above) without some monstrous server doing all the heavy lifting. Qualcomm says

“But wait!” you say, “Isn’t this what WiFi Direct was built for?”.

Yep — the key difference here is that while WiFi Direct can share files between devices, FlashLinq can do that and share connectivity to a cellular network. Nice idea for those situations when only a handful of people in a big crowd can actually manage to pull down any data, right?

So, when can we expect this tech to roll out? Not for a while. Qualcomm’s working with South Korea’s SK Telecom to test out the tech, with trials beginning later this year. If those go well, Qualcomm will have the task of convincing other hardware partners to build this tech into their new gear.

A presentation on FlashLinq below:

FlashLinQ: A Clean Slate Design for Ad Hoc Networks

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VoLTE: Semi-Persistent Scheduling (SPS) and TTI Bundling

The following is from the recently released 4G Americas paper '4G Mobile Broadband Evolution: 3GPP Release-10 and beyond:

With the support of emergency and location services in Rel-9, interest in Voice over LTE (VoLTE) has increased. This is because the Rel-9 enhancements to support e911 were the last step to enable VoLTE (at least in countries that mandate e911) since the Rel-8 specifications already included the key LTE features required to support good coverage, high capacity/quality VoLTE. There are two main features in Rel-8 that focus on the coverage, capacity and quality of VoLTE: Semi-Persistent Scheduling (SPS) and TTI Bundling.

SPS is a feature that significantly reduces control channel overhead for applications that require persistent radio resource allocations such as VoIP. In LTE, both the DL and UL are fully scheduled since the DL and UL traffic channels are dynamically shared channels. This means that the physical DL control channel (PDCCH) must provide access grant information to indicate which users should decode the physical DL shared channel (PDSCH) in each subframe and which users are allowed to transmit on the physical UL shared channel (PUSCH) in each subframe. Without SPS, every DL or UL physical resource block (PRB) allocation must be granted via an access grant message on the PDCCH. This is sufficient for most bursty best effort types of applications which generally have large packet sizes and thus typically only a few users must be scheduled each subframe. However, for applications that require persistent allocations of small packets (i.e. VoIP), the access grant control channel overhead can be greatly reduced with SPS.

SPS therefore introduces a persistent PRB allocation that a user should expect on the DL or can transmit on the UL. There are many different ways in which SPS can setup persistent allocations, and Figure below shows one way appropriate for VoLTE. Note that speech codecs typically generate a speech packet every 20 ms. In LTE, the HARQ interlace time is 8 ms which means retransmissions of PRBs that have failed to be decoded can occur every 8 ms. Figure below shows an example where a maximum of five total transmissions (initial transmission plus four retransmissions) is assumed for each 20 ms speech packet with two parallel HARQ processes. This figure clearly shows that every 20 ms a new “first transmission” of a new speech packet is sent. This example does require an additional 20 ms of buffering in the receiver to allow for four retransmissions, but this is generally viewed as a good tradeoff to maximize capacity/coverage (compared to only sending a maximum of two retransmissions).

The example in Figure above can be applied to both the DL and UL and note that as long as there are speech packets arriving (i.e. a talk spurt) at the transmitter, the SPS PRBs would be dedicated to the user. Once speech packets stop arriving (i.e. silence period), these PRB resources can be re-assigned to other users. When the user begins talking again, a new SPS set of PRBs would be assigned for the duration of the new talkspurt. Note that dynamic scheduling of best effort data can occur on top of SPS, but the SPS allocations would take precedent over any scheduling conflicts.

TTI bundling is another feature in Rel-8 that optimizes the UL coverage for VoLTE. LTE defined 1 ms subframes as the Transmission Time Interval (TTI) which means scheduling occurs every 1 ms. Small TTIs are good for reducing round trip latency, but do introduce challenges for UL VoIP coverage. This is because on the UL, the maximum coverage is realized when a user sends a single PRB spanning 180 kHz of tones. By using a single 180 kHz wide PRB on the UL, the user transmit power/Hz is maximized. This is critical on the UL since the user transmit power is limited, so maximizing the power/Hz improves coverage. The issue is that since the HARQ interlace time is 8 ms, the subframe utilization is very low (1/8). In other words, 7/8 of the time the user is not transmitting. Therefore, users in poor coverage areas could be transmitting more power when a concept termed TTI bundling (explained in the next paragraph) is deployed.

While it’s true that one fix to the problem is to just initiate several parallel HARQ processes to fill in more of the 7/8 idle time, this approach adds significant IP overhead since each HARQ process requires its own IP header. Therefore, TTI bundling was introduced in Rel-8 which combined four subframes spanning 4 ms. This allowed for a single IP header over a bundled 4 ms TTI that greatly improved the subframe utilization (from 1/8 to 1/2) and thus the coverage (by more than 3 dB).

Martin Sauter puts it in a simpler way in his blog as follows: The purpose of TTI Bundling is to improve cell edge coverage and in-house reception for voice. When the base station detects that the mobile can't increase it's transmission power and reception is getting worse it can instruct the device to activate TTI bundling and send the same packet but with different error detection and correction bits in 2, 3 or even 4 consecutive transmit time intervals. The advantage over sending the packet in a single TTI and then detecting that it wasn't received correctly which in turn would lead to one or more retransmissions is that it saves a lot of signaling overhead. Latency is also reduced as no waiting time is required between the retransmissions. In case the bundle is not received correctly, it is repeated in the same way as an ordinary transmission of a packet. Holma and Toskala anticipate a 4dB cell edge gain for VoIP with this feature which is quite a lot. For details how the feature is implemented have a look at 3GPP TS 36.321.

A whitepaper explaining the concepts of TTI Bundling is available on Slideshare here.

'EU-Alert' in Release-11

In the recently concluded 3GPP CT-50 in Istanbul, EU-Alert was adopted as part of Rel-11. The EU-Alert is introduced under Public Warning System (PWS) in parallel with Earthquake and Tsunami Warning System (ETWS).

PWS was introduced in Rel-9 and I blogged about it here. ETWS has been around since Rel-8 and was blogged here.

In fact EU-Alert is sent as part of the Cell Broadcast Message (CBS) using new identifiers. For more details see 3GPP TS 23.401.

The following is an old video from CHORIST project, which was instrumental in providing details of working of this EU-Alert system.

Also Read: Commercial Mobile Alert System (CMAS) here.

Dilbert Humour: Why your software contains bugs

Source: http://www.dilbert.com

4G Mobile Broadband Evolution: 3GPP Release-10 and Beyond

New Report from 4G Americas:

4G Mobile Broadband Evolution: 3GPP Release 10 and Beyond - HSPA+ SAE/LTE and LTE-Advanced provides detailed discussions of Release 10, including the significant new technology enhancements to LTE/EPC (called LTE-Advanced) that were determined in October 2010 to have successfully met all of the criteria established by the International Telecommunication Union Radiotelecommunication Sector (ITU-R) for the first release of IMT-Advanced. IMT-Advanced, which includes LTE-Advanced, provides a global platform on which to build next generations of interactive mobile services that will provide faster data access, enhanced roaming capabilities, unified messaging and broadband multimedia. The paper also provides detailed information on the introduction of LTE-Advanced and the planning for Release 11 and beyond. Release 10 is expected to be finalized in March 2011, while work on Release 11 will continue through the fourth quarter of 2012.

White paper embedded below and is available to view and download from the 3G4G website.

4G Mobile Broadband Evolution: 3GPP Release-10 and Beyond

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Making small purchases simpler with Ericsson IPX

Yesterday a colleague made me aware of this Ericsson's IPX SMS based payment system that looks like a competitor to the NFC technology and doesn't involve any additional chip/hardware. Here is a video:

From Ericsson's website:

Ericsson Internet Payment Exchange (IPX) is a leading mobile aggregator, providing delivery and billing services, via SMS, MMS, web and online mobile billing, to more than 2 billion mobile subscribers across 26 countries. Ericsson IPX also brokers location information in selected countries and Ericsson IPX Messaging provides reach to 96% of all mobile subscribers worldwide with SMS. Ericsson IPX customers are companies who offer digital content, mobile voting & directory information and enterprises offering mobile marketing, communities and banking.

Now, we all love SMS and we have to admit that its the simplest of technology and even the most primitive phone nowadays support it but there could be scenarios when this can be a bit of a problem:

1. SMS can sometimes be delayed if a particular cell is overloaded, etc. So how long do we have to stand in front of the machine?

2. If say for 2-3 mins we do not receive an indication that the machine has a cash, do we send another SMS to cancel the transaction?

3. If we have a problem, do we have a support number to call to? How much will that cost?

4. If there is a queue of people and someone else wants to purchase something as well, does the next person has to wait till the person before has received the item?

5. If two people have sent an SMS, how do they know whose cash is in the machine now? Do we start putting a Pin as well ?

I agree, this technology could be really useful if you have run out of cash (even if you have NFC chip) and you need to purchase something small.

The other obvious advantage is that you can target advertisement at regular users who are at a particular place at a particular time to make them buy something. Also you can get statistics like what time people tend to purchase, what do they purchase, where, etc.

Anyway, hard for me to see this take off big time.

6th ETSI Security Workshop

6th ETSI Security workshop was held last month. There were some very interesting areas of discussion including Wireless/Mobile Security, Smart Grids Security, etc.

Security in 3GPP

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Embedded SIMs and M2M Communications

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All presentations are available to download from here.

Wireless Friendly Buildings

Long back I wrote about problems with Radiation Proofed homes. Since then the wireless technologies have got more popular and the technologies in infancy have become mainstream.

Last week I heard Professor Richard Langley from Sheffield University speaking on the topic of wireless friendly buildings. The problem now is manifold rather than just keeping the wireless signal in or out.

Think about the WiFi that is installed in nearly every house. The signals from WiFi are best kept indoors to avoid the interference to neighbours. Wifi uses 2.4GHz ISM band. On the other hand we may want the mobile signal to penetrate the house so that we can get good reception. In Europe UMTS is mostly 2.1GHz and LTE may be mostly 2.6GHz. The intention of the building should be to keep the WiFi signal out and the UMTS/LTE signal in.

The problem we have to remember is that with the frequencies going higher, the penetration of signals are becoming a problem. This means that the construction of the buildings should be modified to keep the attenuation to minimum, higher the frequency.

With femtocells most likely to become more popular by the day, you may want to keep these frequencies from going out of the house but allowing them to come in. This presents a big challenge. The intention of the buildings design in the western world is to keep the cold/heat/radiation out. The concept of 'wireless friendly building design' is the least important in the mind of the architects and civil engineers.

The may change over the time due to effort by the organisations like the Wireless Friendly Building Forum (WFBF).

From an article in Building.co.uk:

At the moment, says Chris Yates, chairman of the Wireless Friendly Building Forum (WFBF), predicting the performance of a building to handle wireless signals is almost impossible. “There is a lot of spurious science around and software that purports to give plots of wireless coverage in a building. It’s utterly naive and doesn’t reflect reality,” he says.

One of the reasons the forum was set up at the end of last year was to co-ordinate research into the area of wireless systems in buildings. As the use of wireless devices increases, more and more issues over performance will arise, explains Yates - and there is nobody taking an interdisciplinary approach on how this performance can be improved.

With wireless looking set to be a mainstay of the way we work in the future, the WFBF ultimately wants to develop a way of defining and assessing its performance in any one building, similar to the way in which BREEAM or LEED rate a building’s environmental performance. “Then a value can be placed on it and developers and end users get interested and it becomes part of their decision-making process,” says Yates.

But until this is achieved, what should designers be doing? Here, we take a look at three wireless applications and the main implications for buildings.

Cellular signals are broadcast by public masts and are actually very difficult to keep out of a building. The main path in is through the glazing, but once inside, things can start to go haywire, with signals reflected or absorbed by the building’s structure.

Columns, lift shafts and risers in particular can create blackspots where reception becomes poor or non-existent. Concrete floors cast on lightweight metal decks will block most signals, as will materials such as lead roofing and the metal foils on the back of some insulation materials.

A common way to deal with this is to boost the signal or re-broadcast it using a repeater. These systems usually use an external antenna to collect the signal, which is transmitted to an amplifier and retransmitted locally. For multistorey buildings, several transmitters might be needed.

Of course, this equipment needs to be accommodated and installed, but when this should be done is a source of some confusion. The current BCO guide to specification does not outline at what stage ICT infrastructure should be installed, but according to Yates some sort of infrastructure provision should be made at the core and shell stage, even if the active equipment isn’t installed.

Signal strength can also be significantly decreased by the use of high-performance glazing and solar shading, which are becoming commonplace with the tightening of Part L of the Building Regulations.

Mitigating action can be taken. Buro Happold’s specialist facade division, for example, is now beginning to consider the effect that facade components have on wireless performance, while also considering trade-offs in acoustic, blast, thermal performance and aesthetics.

According to Yates these trade-offs need careful consideration. Some glass options might give marginally better performance in terms of thermal behaviour, but completely ruin the wireless service, whereas another option might give negligible degradation for a similar price. “

So it is something to think about. It’s no good handing the building over and then telling them there’s no wireless signal,” warns Yates.

The following is an interesting presentation on the related topic:

Wireless Friendly Buildings

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Making of the Qualcomm Museum

For Qualcomm, Baker created a corporate museum experience that gives visitors an understanding of what lies at the core of the company’s extraordinary success story.

Attocell: Smaller Femtocell

Over the last year Femtocells et al. have been slowly rebranded as Small cells and I agree that it is a much more generic term and easier for end users to understand.

Last year, around this time, magicJack announced a small USB Femtocell (a lot of Femto manufacturers disagree that its a Femtocell) that can help reduce the cost of call and just a few days back Picochip announced picoXcell, a USB form factor femtocell.

Yesterday, Ubiquisys announced the Attocell. As can be seen in the picture above, in mathematics, femto is 10^-15 and atto is 10^-18. I know that some of you may think that there is still scope for zeptocells and yoctocells but it may be difficult to see in the light of Attocells, what they can be.

A few years back, I blogged about how Femtocells can be used to steal the spectrum. Well, Attocell legally allows to do just that. The press release states the following:

The attocell connects to a user’s laptop via USB, which provides power and an internet connection. It then analyses the IP address and radio environment to determine which country it is in, and sets its 3G radio power accordingly to below the licenced level. In some countries its range will be just 5mm, in other countries, it could cover a whole room.

Like Ubiquisys femtocells, the attocell continuously monitors its radio environment to ensure that there is zero impact on existing mobile networks. This intelligence, combined with its tiny power output, is likely to make the attocell exempt from regulatory controls and the requirement for type approval.

In 5mm mode, the traveller simply lays the iPhone on top of the device and the phone connects automatically, just like a regular femtocell. Calls can be made using a Bluetooth or wired headset , or by using the iPhone’s speaker.

You can understand more by reading the official Attocell FAQ here.

It would be very interesting to see if any of the big operators support this device. Roaming revenues are big part of operators profit. Informa has predicted that this roaming revenue will keep rising. The roaming revenue comes from voice, sms as well as data. Some business users in one business trip frequently shell as much as a personal user would for a years contract. So its not really in operators interest to promote these devices.

On the other hand, small operators and MVNO may really like this as this can help them win more subscribers and can be the differentiators in the market.

Once more thing worth remembering is that since the arrival of Skype, the occasional and cautious mobile users have no hesitation on making VoIP calls and keeping friends, family and colleagues back home up to date with their status. The operators are aware of this and wouldnt mind the users instead using their mobiles via attocell.

Ubiquisys will show the Attocell in MWC in mid-Feb and we will have to wait and see the reaction.

Oops! Texting Fail: Woman Falls in Fountain

You can watch the CBS news video and that woman's interview here.

MAPCON - Multi Access PDN Connectivity

On Monday, I read Bernard Herscovich, CEO, BelAir Networks saying the following in RCR Wireless:

Wi-Fi is obviously a way to offload data to alleviate congestion, but it also contributes to overall network profitability by delivering data at a lower cost per megabit that traditional macrocells. ABI Research estimates that carrier Wi-Fi can deliver data at 5% the cost of adding cellular capacity. Perhaps the most important driver, though, is the fact that, properly designed and architected, a carrier Wi-Fi network will deliver a consistently great user experience. The implications of that on attracting and retaining subscribers are obvious.

We've also seen cable operators taking advantage of their broadband HFC infrastructure to mount Wi-Fi APs throughout their coverage areas, offering free Wi-Fi as a sticky service to attract and retain home broadband subscribers.

At the GSMA Mobile Asia Congress, back in mid-November, 2010, KDDI's president and chairman explained that while they would be migrating to LTE, which would double their network capacity, data demand in Japan was forecast to increase by 15 times over the next five years. So LTE alone, he admitted, would not be enough. A few weeks before that, European operators, including Deutsche Telekom and Telefonica, were making similar statements at the Broadband World Forum in Paris.

It is clear that LTE alone will not be sufficient to meet ongoing mobile data demand. Technical innovation has resulted in huge capacity gains, but we're now at a point where additional bandwidth is more of a by-product of incremental spectrum. And, we all realize the finite nature of that resource. So, based on this new spectrum, LTE macrocells could deliver a 2 – 4X capacity increase. Meanwhile, ABI estimates that data capacity requirements are increasing 150% per year.

So, it's pretty clear that carriers are going to need more than just an LTE swap out to keep delivering a great user experience. They need to, as many already realize, augment their licensed spectrum with Wi-Fi. KT, the second largest mobile carrier in South Korea, claims to be offloading 67% of their mobile data traffic onto Wi-Fi. There may also be additional unlicensed spectrum made available, at least in the U.S. and the U.K., through the release of so-called white space spectrum, freed up through the switch from analog to digital TV.

It is obvious from the technology point of view that Multiple PDN connections would need to be supported when the UE is using LTE for part of data connection and Wi-Fi for other part. In fact these two (or multiple) connections should be under the control of the same EPC core that can help support seamless mobility once you move out of the WiFi hotspot.

One of the items in 3GPP Release-10 is to do with supporting of multiple Packet Data Networks (PDN) connections for a device. A Release-9 network and the UE can only support 3GPP access based connection via EPC. In Release-10 support for upto 1 non-3GPP access has been added.

FMC100044 specifies the following requirements:

• The Evolved Packet System supports the following scenarios: a single Operator offering both fixed and mobile access; different Operators collaborating to deliver services across both networks.
• The Evolved Packet System shall support the access of services from mobile network through fixed access network via interworking.
• The Evolved Packet System shall be able to support functions for connectivity, subscriber authentication, accounting, Policy Control and quality of service for interworking between the fixed broadband access and Evolved Packet Core.
• The Evolved Packet System shall optimize QoS and Policy management meaning that it shall offer minimal signalling overhead, while interworking between the fixed broadband access and Evolved Packet Core.
• The Evolved Packet System shall be able to provide an equivalent experience to users consuming services via different accesses.

The Rel-10 work item extends Rel-9 EPC to allow a UE equipped with multiple network interfaces to establish multiple PDN connections to different APNs via different access systems. The enhancements enable:

• Establishment of PDN connections to different APNs over multiple accesses. A UE opens a new PDN connection on an access that was previously unused or on one of the accesses it is already simultaneously connected to.
• Selective transfer of PDN connections between accesses. Upon inter-system handover a UE transfers only a subset of the active PDN connections from the source to the target access, with the restriction that multiple PDN connections to the same APN shall be kept in one access.
• Transfer of all PDN connections out of a certain access system. A UE that is simultaneously connected to multiple access systems moves all the active PDN connections from the source to target access, e.g. in case the UE goes out of the coverage of the source access.

This work also provides mechanisms enabling operator's control on routing of active PDN connections across available accesses.

The scope of the work is restricted to scenarios where the UE is simultaneously connected to one 3GPP access and one, and only one, non-3GPP access. The non-3GPP access can be either trusted or untrusted.

The design of the required extensions to Rel-9 EPC is based on TR 23.861 Annex A, that provides an overview of the changes that are expected in TS 23.401 and TS 23.402 for the UE to simultaneously connect to different PDNs via different access systems.

See Also:

3GPP TR 23.861: Multi access PDN connectivity and IP flow mobility

3GPP TS 22.278: Service requirements for the Evolved Packet System (EPS)

Old Blog post on Multiple PDN Connectivity

Simplified view of Heterogeneous Networks (HetNets)

A very simple picture explaining HetNets are,

To learn more about HetNet's, see my old blog post here or the Qualcomm video from yesterday here.

Qualcomm Video on LTE Advanced: Heterogeneous Networks

Wilson Street: What can femtocells do - the next big thing!

I have blogged about the Alcatel-Lucent (ALU) Femtocells in the past. Few months back I posted about their shift from using the term Femtocells to Small cells. To make everyone aware of this small cells they launched their Wilson Street experiment and are now producing some episodes to show how these small cells can play big part in everyday life.

The first two episodes are embedded below from Youtube.

The latest (3rd) episode is available on the Wilson Street Website here.

eMPS: Enhanced Multimedia Priority Service in Release-10 and beyond

The response to emergency situations (e.g., floods, hurricanes, earthquakes, terrorist attacks) depends on the communication capabilities of public networks. In most cases, emergency responders use private radio systems to aid in the logistics of providing critically needed restoration services. However, certain government and emergency management officials and other authorised users have to rely on public network services when the communication capability of the serving network may be impaired, for example due to congestion or partial network infrastructure outages, perhaps due to a direct or indirect result of the emergency situation.

Multimedia Priority Service, supported by the 3GPP system set of services and features, is one element creating the ability to deliver calls or complete sessions of a high priority nature from mobile to mobile networks, mobile to fixed networks, and fixed to mobile networks.

Requirements for the Multimedia Priority Service (MPS) have been specified in TS 22.153 for the 3GPP Release-9

The intention of MPS is to enable National Security/Emergency Preparedness (NS/EP) users (herein called Service Users) to make priority calls/sessions using the public networks during network congestion conditions. Service Users are the government-authorized personnel, emergency management officials and/or other authorized users. Effective disaster response and management rely on the Service User’s ability to communicate during congestion conditions. Service Users are expected to receive priority treatment, in support of mission critical multimedia communications.

LTE/EPC Release 9 supports IMS-based voice call origination by a Service User and voice call termination to a Service User with priority. However, mechanisms for completing a call with priority do not exist for call delivery to a regular user for a priority call originated by a Service User. MPS enhancements are needed to support priority treatment for Release 10 and beyond for call termination and for the support of packet data and multimedia services.

MPS will provide broadband IP-based multimedia services (IMS-based and non-IMS-based) over wireless networks in support of voice, video, and data services. Network support for MPS will require end-to-end priority treatment in call/session origination/termination including the Non Access Stratum (NAS) and Access Stratum (AS) signaling establishment procedures at originating/terminating network side as well as resource allocation in the core and radio networks for bearers. The MPS will also require end-to-end priority treatment in case of roaming if supported by the visiting network and if the roaming user is authorized to receive priority service.

MPS requirement is already achieved in the 3G circuit-switched network. Therefore, if the network supports CS Fallback, it is necessary to provide at least the same capability as 3G circuit switched-network in order not to degrade the level of voice service. In CS Fallback, UE initiates the fallback procedures over the LTE as specified in TS 23.272 when UE decides to use the CS voice service for mobile originating and mobile terminating calls. To achieve priority handling of CS Fallback, NAS and AS signaling establishment procedures, common for both IP-based multimedia services and CS Fallback, shall be treated in a prioritized way.

In Release-10, for LTE/EPC, the following mechanisms will be specified.

• Mechanisms to allocate resources for signaling and media with priority based on subscribed priority or based on priority indicated by service signaling.
• For a terminating IMS session over LTE, a mechanism for the network to detect priority of the session and treat it with priority.

In Release-10, for CS Fallback, the following mechanism will be specified:

• A mechanism to properly handle the priority terminating voice call and enable the target UE to establish the AS and NAS connection to fall-back to the GERAN/UTRAN/1xRTT.

For more information, see:

3GPP TR 23.854: Enhancements for Multimedia Priority Service (Release 10)

3GPP TS 22.153: Multimedia priority service (Release 10)

10 business models that rocked 2010

Very interesting read!

10 business models that rocked 2010 - by @nickdemey (boardofinnovation.com)

View more presentations from Board of Innovation (BOI).

3GPP Tutorials via 'The SpecTools'

Some of you may have noticed that the new and revamped 3GPP website have recently started offering 3GPP specs and features tutorials via The SpecTools. There is quite a lot of useful information and most of it is premium but a lot is free as well.

So the new starters or those wishing to refresh their knowledge feel free to check this out:

http://www.thespectool.com/3gpp/index.php

Heterogeneous LTE Networks and Inter-Cell Interference Coordination

An interesting paper that is more of a background to my earlier post here is available from Nomor Research and is embedded below.

Heterogeneous LTE Networks and Inter-Cell Interference Coordination

View more documents from Zahid Ghadialy.

This paper is available to download from here.

RAN mechanisms to avoid CN overload due to MTC

Machine-to-Machine (M2M) is the future and Machine-type communications (MTC) will be very important once we have billions of connected devices. I have talked in the past about the 50 Billion connected devices by 2050 and the Internet of Things.

One of the challenges of today's networks is to handle this additional signalling traffic due to MTC. One of the very important topics being discussed in 3GPP RAN meetings is 'RAN mechanisms to avoid CN overload due to MTC'. Even though it has not been finalised, its interesting to see the direction in which things are moving.

The above figure from R2-106188 shows that an extended wait time could be added in the RRC Connection Reject/Release message in case if the eNodeB is overloaded. The device can reattempt the connection once the wait time has expired.

In R2-110462, another approach is shown where Core Network (CN) is overloaded. Here a NAS Request message is sent with delay tolerant indicator a.k.a. low priority indicator. If the CN is overloaded then it can reject the request with a backoff timer. Another approach would be to send this info to the eNodeB that can do a RRC Connection Reject when new connection request is received.

All Documents from 3GPP RAN2 #72-bis are available here. Search for NIMTC for M2M related and overload related docs.

More Dilbert Humour on Cloud Computing

When I posted a Dilbert cartoon on the weekend, I expected lots of people to click on 'Not Useful' box at the bottom of the post. Honestly I got more response than I expected. Now with Cloud being talked about everywhere, I thought it would be worthwhile sticking some more old Dilbert Cloud crackers.

To combine fun with work, there are some links as well pointing to some recent Cloud based articles. Enjoy!

Ericsson CTO: cloud computing + mobile connectivity = mind-blowing innovation

Look up, it's the future: Learning to love 'the cloud'

CES2011: NEC dual-screen Android Cloud Communicator LT-W hands-on

How the Wikimedia Foundation is Using OpenStack to Build a Cloud Infrastructure

Security researcher uses Amazon cloud to hack WPA-PSK passwords

Data security must improve for the cloud to succeed

Efficiency drive will grow government outsourcing and cloud usage, says Ovum

Introducing Windows Azure

Source of Cartoons: http://dilbert.com/

SI on Signalling and procedure for interference avoidance for in-device coexistence

In order to allow users to access various networks and services ubiquitously, an increasing number of UEs are equipped with multiple radio transceivers. For example, a UE may be equipped with LTE, WiFi, and Bluetooth transceivers, and GNSS receivers. One resulting challenge lies in trying to avoid coexistence interference between those collocated radio transceivers. Figure 4-1 below shows an example of coexistence interference.

3GPP initiated a Study Item (SI) in Release-10 timeframe to investigate the effects of the interference due to multiple radios and signalling. This study is detailed in 3GPP TR 36.816 (see link at the end).

Due to extreme proximity of multiple radio transceivers within the same UE, the transmit power of one transmitter may be much higher than the received power level of another receiver. By means of filter technologies and sufficient frequency separation, the transmit signal may not result in significant interference. But for some coexistence scenarios, e.g. different radio technologies within the same UE operating on adjacent frequencies, current state-of-the-art filter technology might not provide sufficient rejection. Therefore, solving the interference problem by single generic RF design may not always be possible and alternative methods needs to be considered. An illustration of such kind of problem is shown in Figure 4-2 above.

The following scenarios were studied:

- LTE coexisting with WiFi

- LTE coexisting with Bluetooth

- LTE Coexisting with GNSS

Based on the analysis in SI, some examples of the problematic coexistence scenarios that need to be further studied are as follows:

- Case 1: LTE Band 40 radio Tx causing interference to ISM radio Rx;

- Case 2: ISM radio Tx causing interference to LTE Band 40 radio Rx;

- Case 3: LTE Band 7 radio Tx causing interference to ISM radio Rx;

- Case 4: LTE Band 7/13/14 radio Tx causing interference to GNSS radio Rx.

In order to facilitate the study, it is also important to identify the usage scenarios that need to be considered. This is because different usage scenarios will lead to different assumption on behaviours of LTE and other technologies radio, which in turn impact on the potential solutions. The following scenarios will be considered:

1a) LTE + BT earphone (VoIP service)

1b) LTE + BT earphone (Multimedia service)

2) LTE + WiFi portable router

3) LTE + WiFi offload

4) LTE + GNSS Receiver

The SI also proposes some ways of reducing the interference and is work in progress at the moment.

Reference: 3GPP TR 36.816 : Study on signalling and procedure for interference avoidance for in-device coexistence; (Release 10).

Dilbert Humour: Cloud Computing

Source: Dilbert

If you like these then please click 'Very Useful' or 'More like this' so that I know people find these useful.

For similar things follow the label: Mobile Humour.

LTE-Advanced (Rel-10) UE Categories

I blogged about the 1200Mbps of DL with LTE Advanced earlier and quite a few people asked me about the bandwidth, etc. I found another UE categories table in Agilent lterature on LTE-Advanced here.

The existing UE categories 1-5 for Release 8 and Release 9 are shown in Table 4. In order to accommodate LTE-Advanced capabilities, three new UE categories 6-8 have been defined.

Note that category 8 exceeds the requirements of IMT-Advanced by a considerable

margin.

Given the many possible combinations of layers and carrier aggregation, many configurations could be used to meet the data rates in Table 4. Tables 5 and 6 define the most probable cases for which performance requirements will be developed.

Refresher: LTE MAC Layer Protocol

This is following the RLC refresher post here. You can also view logs from real tests on a real LTE UE here.

3GPP LTE-MAC

View more presentations from praveenkmr78.

eICIC: Enhanced inter-cell interference coordination in 3GPP Release-10

Inter-cell interference coordination (ICIC) was introduced in Release-8/9 of the 3GPP LTE standards. The basic idea of ICIC is keeping the inter-cell interferences under control by radio resource management (RRM) methods. ICIC is inherently a multi-cell RRM function that needs to take into account information (e.g. the resource usage status and traffic load situation) from multiple cells.

Broadly speaking, the main target of any ICIC strategy is to determine the resources (bandwidth and power) available at each cell at any time. Then (and typically), an autonomous scheduler assigns those resources to users. Thus, from the Radio Resource Control perspective, there are two kind of decisions: (a) which resources will be allocated to each cell? and, (b) which resources will be allocated to each user?. Clearly, the temporality of such decisions is quite different. Whereas resources to users allocation is in the order of milliseconds, the allocation of resources to cells take much longer periods of time or can be fixed.

Static ICIC schemes are attractive for operators since the complexity of their deployment is very low and there is not need for new extra signaling out of the standard. Static ICIC mostly relies on the fractional reuse concept. This means that users are categorized according to their Signal-to-Noise-plus-Interference Ratio (SINR), that means basically according to their inter-cell interference, and different reuse factors are applied to them, being higher at regions with more interference, mostly outer regions of the cells. The total system bandwidth is divided into sub-bands which are used by the scheduler accordingly.

A simple way to explain ICIC is based on picture above. The users are divided into two categories, one is Cell Center User (CCU), and the other one is Cell Edge User (CEU). CCUs are the users distributed in the gray region of above figure, and CEUs are the users distributed in the above red, green and blue areas. CCU can use all the frequencypoints to communicate with the base station, while CEU must use corresponding specified frequency points to ensure orthogonality between different cells.

CEUs can be assigned a higher transmissionpower for the frequency reuse factor is greater than 1. The frequency points are not overlapped at the edges so the adjacent cell interference is small. CCU’s frequency reuse factor is 1; for the path loss is small and transmission power is low. Therefore the interference to the adjacent cells is not high either.

Dominant interference condition has been shown when Non-CSG/CSG users are in close proximity of Femto, in this case, Rel8/9 ICIC techniques are not fully effective in mitigating control channel interference, and hence, Enhanced interference management is needed At least the following issues should be addressed by any proposed solutions:

o Radio link monitoring (RLM)

o Radio Resource Management (including detection of PSS/SSS and PBCH)

o Interference from CRS

oo To PCFICH/PHICH/PDCCH

oo To PDSCH

o CSI measurement

o Interference from PDCCH masked with P-RNTI and SI-RNTI (for SIB-1 only) and associated PCFICH

As a result, from Release-10 onwards eICIC work was started. In Rel-10, two eICIC or Enhanced inter-cell interference coordination (also incorrectly referred to as Enhanced Inter-Cell Interference Cancellation) were being actively discussed. They are Time domain eICIC and autonomous HeNB power setting. More advanced ideas are being thought of beyong Rel-10 including Interference management techniques on carrier resolution ( optimally exploiting available Networks frequency assets (carriers in same or different bands) , combination with Carrier Aggregation; interference management schemes proposed both during LTE-Advanced Study Item phase, and during Rel-10 HetNet eICIC work.

From an earlier presentation in SON Conference:

eICIC:

- Effectively extends ICIC to DL control - time domain

- Requires synchronization at least between macro eNB and low power eNBs in its footprint

- No negative impact on legacy Rel 8 Use

Range Extension(RE)

- Refers to UE ability to connect and stay connected to a cell with low SINR

- Achieved with advanced UE receivers - DL interference cancellation (IC)

RE + eICIC technique:

– Eliminates coverage holes created by closed HeNBs

– Improves load balancing potential for macro network with low power eNBs and leads to significant network throughput increase

–Enables more UEs can be served by low power eNBs, which can lead to substantially higher network throughput

More details on eICIC is available in 3GPP CR's and TR's listed below:

• R1-105081: Summary of the description of candidate eICIC solutions, 3GPP TSG-WG1 #62, Madrid, Spain, August 23rd – 27th, 2010.
• R1-104942: Views on eICIC Schemes for Rel-10, 3GPP TSG RAN WG1 Meeting #62, Madrid, Spain, 23-27 August, 2010.
• R1-104238: eICIC Chairman’s note, 3GPP TSG RAN WG1 Meeting #61bis, Dresden, Germany, 28th June – 2nd July 2010.
• R1-103822: Enhanced ICIC considerations for HetNet scenarios, 3GPP TSG RAN WG1 #61bis Meeting, Dresden, Germany, June 28 – July 2, 2010.

You can also check out NTT Docomo's presentation on LTE Enhancements and Future Radio Access here.

Mobile Broadband Enablers in future

From a presentation by Huawei at the New Zealand Future Wireless Technologies Seminar. The presentation is available here.